diff options
| -rw-r--r-- | gcc/cppalloc.c | 81 | ||||
| -rw-r--r-- | gcc/cpperror.c | 338 | ||||
| -rw-r--r-- | gcc/cppexp.c | 988 | ||||
| -rw-r--r-- | gcc/cpphash.c | 192 | ||||
| -rw-r--r-- | gcc/cpphash.h | 40 | ||||
| -rw-r--r-- | gcc/cpplib.c | 7288 | ||||
| -rw-r--r-- | gcc/cpplib.h | 657 | ||||
| -rw-r--r-- | gcc/cppmain.c | 102 |
8 files changed, 9686 insertions, 0 deletions
diff --git a/gcc/cppalloc.c b/gcc/cppalloc.c new file mode 100644 index 00000000000..aa37aac25b5 --- /dev/null +++ b/gcc/cppalloc.c @@ -0,0 +1,81 @@ +/* Part of CPP library. (memory allocation - xmalloc etc) + Copyright (C) 1986, 87, 89, 92, 93, 94, 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994. + Based on CCCP program by by Paul Rubin, June 1986 + Adapted to ANSI C, Richard Stallman, Jan 1987 + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +static void +memory_full () +{ + fatal ("Memory exhausted."); +} + +char * +xmalloc (size) + unsigned size; +{ + register char *ptr = (char *) malloc (size); + if (ptr != 0) return (ptr); + memory_full (); + /*NOTREACHED*/ + return 0; +} + +char * +xrealloc (old, size) + char *old; + unsigned size; +{ + register char *ptr = (char *) realloc (old, size); + if (ptr != 0) return (ptr); + memory_full (); + /*NOTREACHED*/ + return 0; +} + +char * +xcalloc (number, size) + unsigned number, size; +{ + register unsigned total = number * size; + register char *ptr = (char *) malloc (total); + if (ptr != 0) { + if (total > 100) + bzero (ptr, total); + else { + /* It's not too long, so loop, zeroing by longs. + It must be safe because malloc values are always well aligned. */ + register long *zp = (long *) ptr; + register long *zl = (long *) (ptr + total - 4); + register int i = total - 4; + while (zp < zl) + *zp++ = 0; + if (i < 0) + i = 0; + while (i < total) + ptr[i++] = 0; + } + return ptr; + } + memory_full (); + /*NOTREACHED*/ + return 0; +} diff --git a/gcc/cpperror.c b/gcc/cpperror.c new file mode 100644 index 00000000000..e552989087c --- /dev/null +++ b/gcc/cpperror.c @@ -0,0 +1,338 @@ +/* Default error handlers for CPP Library. + Copyright (C) 1986, 87, 89, 92, 93, 94, 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994. + Based on CCCP program by by Paul Rubin, June 1986 + Adapted to ANSI C, Richard Stallman, Jan 1987 + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#include "cpplib.h" +#include <stdio.h> + +/* This defines "errno" properly for VMS, and gives us EACCES. */ +#include <errno.h> +#ifndef errno +extern int errno; +#endif + +#ifndef VMS +#ifndef HAVE_STRERROR +extern int sys_nerr; +#if defined(bsd4_4) || defined(__NetBSD__) +extern const char *const sys_errlist[]; +#else +extern char *sys_errlist[]; +#endif +#else /* HAVE_STERRROR */ +char *strerror (); +#endif +#else /* VMS */ +char *strerror (int,...); +#endif + +/* Print the file names and line numbers of the #include + commands which led to the current file. */ + +void +cpp_print_containing_files (pfile) + cpp_reader *pfile; +{ + cpp_buffer *ip; + int i; + int first = 1; + + /* If stack of files hasn't changed since we last printed + this info, don't repeat it. */ + if (pfile->input_stack_listing_current) + return; + + ip = cpp_file_buffer (pfile); + + /* Give up if we don't find a source file. */ + if (ip == NULL) + return; + + /* Find the other, outer source files. */ + while ((ip = CPP_PREV_BUFFER (ip)), ip != CPP_NULL_BUFFER (pfile)) + { + long line, col; + cpp_buf_line_and_col (ip, &line, &col); + if (ip->fname != NULL) + { + if (first) + { + first = 0; + fprintf (stderr, "In file included"); + } + else + fprintf (stderr, ",\n "); + } + +/* start-sanitize-mpw */ +#ifdef MPW + fprintf (stderr, " File \"%s\"; Line %d # ", ip->nominal_fname, line); +#else +/* end-sanitize-mpw */ + fprintf (stderr, " from %s:%d", ip->nominal_fname, line); +/* start-sanitize-mpw */ +#endif /* MPW */ +/* end-sanitize-mpw */ + } + if (! first) + fprintf (stderr, ":\n"); + + /* Record we have printed the status as of this time. */ + pfile->input_stack_listing_current = 1; +} + +void +cpp_print_file_and_line (pfile) + cpp_reader *pfile; +{ + cpp_buffer *ip = cpp_file_buffer (pfile); + + if (ip != NULL) + { + long line, col; + cpp_buf_line_and_col (ip, &line, &col); + if (pfile->show_column) + fprintf (stderr, "%s:%d:%d: ", ip->nominal_fname, line, col); + else + fprintf (stderr, "%s:%d: ", ip->nominal_fname, line); + } +} + +void +cpp_error (pfile, msg, arg1, arg2, arg3) + cpp_reader *pfile; + char *msg; + char *arg1, *arg2, *arg3; +{ + cpp_print_containing_files (pfile); + cpp_print_file_and_line (pfile); + fprintf (stderr, msg, arg1, arg2, arg3); + fprintf (stderr, "\n"); + pfile->errors++; +} + +/* Print error message but don't count it. */ + +void +cpp_warning (pfile, msg, arg1, arg2, arg3) + cpp_reader *pfile; + char *msg; + char *arg1, *arg2, *arg3; +{ + if (CPP_OPTIONS (pfile)->inhibit_warnings) + return; + + if (CPP_OPTIONS (pfile)->warnings_are_errors) + pfile->errors++; + + cpp_print_containing_files (pfile); + cpp_print_file_and_line (pfile); + fprintf (stderr, "warning: "); + fprintf (stderr, msg, arg1, arg2, arg3); + fprintf (stderr, "\n"); +} + +void +cpp_error_with_line (pfile, line, msg, arg1, arg2, arg3) + cpp_reader *pfile; + int line; + char *msg; + char *arg1, *arg2, *arg3; +{ + int i; + cpp_buffer *ip = cpp_file_buffer (pfile); + + cpp_print_containing_files (pfile); + + if (ip != NULL) + fprintf (stderr, "%s:%d: ", ip->nominal_fname, line); + + fprintf (stderr, msg, arg1, arg2, arg3); + fprintf (stderr, "\n"); + pfile->errors++; +} + +void +cpp_warning_with_line (pfile, line, msg, arg1, arg2, arg3) + cpp_reader *pfile; + int line; + char *msg; + char *arg1, *arg2, *arg3; +{ + int i; + cpp_buffer *ip; + + if (CPP_OPTIONS (pfile)->inhibit_warnings) + return; + + if (CPP_OPTIONS (pfile)->warnings_are_errors) + pfile->errors++; + + cpp_print_containing_files (pfile); + + ip = cpp_file_buffer (pfile); + + if (ip != NULL) + fprintf (stderr, "%s:%d: ", ip->nominal_fname, line); + fprintf (stderr, "warning: "); + fprintf (stderr, msg, arg1, arg2, arg3); + fprintf (stderr, "\n"); +} + +/* Print an error message and maybe count it. */ + +void +cpp_pedwarn (pfile, msg, arg1, arg2, arg3) + cpp_reader *pfile; + char *msg; + char *arg1, *arg2, *arg3; +{ + if (CPP_OPTIONS (pfile)->pedantic_errors) + cpp_error (pfile, msg, arg1, arg2, arg3); + else + cpp_warning (pfile, msg, arg1, arg2, arg3); +} + +void +cpp_pedwarn_with_line (pfile, line, msg, arg1, arg2, arg3) + cpp_reader *pfile; + int line; + char *msg; + char *arg1, *arg2, *arg3; +{ + if (CPP_OPTIONS (pfile)->pedantic_errors) + cpp_error_with_line (pfile, line, msg, arg1, arg2, arg3); + else + cpp_warning_with_line (pfile, line, msg, arg1, arg2, arg3); +} + +/* Report a warning (or an error if pedantic_errors) + giving specified file name and line number, not current. */ + +void +cpp_pedwarn_with_file_and_line (pfile, file, line, msg, arg1, arg2, arg3) + cpp_reader *pfile; + char *file; + int line; + char *msg; + char *arg1, *arg2, *arg3; +{ + if (!CPP_OPTIONS (pfile)->pedantic_errors + && CPP_OPTIONS (pfile)->inhibit_warnings) + return; + if (file != NULL) + fprintf (stderr, "%s:%d: ", file, line); + if (CPP_OPTIONS (pfile)->pedantic_errors) + pfile->errors++; + else + fprintf (stderr, "warning: "); + fprintf (stderr, msg, arg1, arg2, arg3); + fprintf (stderr, "\n"); +} + +void +fatal (str, arg) + char *str, *arg; +{ + fprintf (stderr, "%s: ", progname); + fprintf (stderr, str, arg); + fprintf (stderr, "\n"); + exit (FAILURE_EXIT_CODE); +} + + +/* + * my_strerror - return the descriptive text associated with an `errno' code. + */ + +char * +my_strerror (errnum) + int errnum; +{ + char *result; + +#ifndef VMS +#ifndef HAVE_STRERROR + result = (char *) ((errnum < sys_nerr) ? sys_errlist[errnum] : 0); +#else + result = strerror (errnum); +#endif +#else /* VMS */ + /* VAXCRTL's strerror() takes an optional second argument, which only + matters when the first argument is EVMSERR. However, it's simplest + just to pass it unconditionally. `vaxc$errno' is declared in + <errno.h>, and maintained by the library in parallel with `errno'. + We assume that caller's `errnum' either matches the last setting of + `errno' by the library or else does not have the value `EVMSERR'. */ + + result = strerror (errnum, vaxc$errno); +#endif + + if (!result) + result = "undocumented I/O error"; + + return result; +} + +/* Error including a message from `errno'. */ + +void +cpp_error_from_errno (pfile, name) + cpp_reader *pfile; + char *name; +{ + int i; + cpp_buffer *ip = cpp_file_buffer (pfile); + + cpp_print_containing_files (pfile); + + if (ip != NULL) + fprintf (stderr, "%s:%d: ", ip->nominal_fname, ip->lineno); + + fprintf (stderr, "%s: %s\n", name, my_strerror (errno)); + + pfile->errors++; +} + +void +cpp_perror_with_name (pfile, name) + cpp_reader *pfile; + char *name; +{ + fprintf (stderr, "%s: ", progname); + fprintf (stderr, "%s: %s\n", name, my_strerror (errno)); + pfile->errors++; +} + +void +cpp_pfatal_with_name (pfile, name) + cpp_reader *pfile; + char *name; +{ + cpp_perror_with_name (pfile, name); +#ifdef VMS + exit (vaxc$errno); +#else + exit (FAILURE_EXIT_CODE); +#endif +} diff --git a/gcc/cppexp.c b/gcc/cppexp.c new file mode 100644 index 00000000000..11fdfdd95eb --- /dev/null +++ b/gcc/cppexp.c @@ -0,0 +1,988 @@ +/* Parse C expressions for CCCP. + Copyright (C) 1987, 1992, 1994, 1995 Free Software Foundation. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! + +Written by Per Bothner 1994. */ + +/* Parse a C expression from text in a string */ + +#include "config.h" +#include "cpplib.h" + +#ifdef MULTIBYTE_CHARS +#include <stdlib.h> +#include <locale.h> +#endif + +#include <stdio.h> + +/* This is used for communicating lists of keywords with cccp.c. */ +struct arglist { + struct arglist *next; + U_CHAR *name; + int length; + int argno; +}; + +/* Define a generic NULL if one hasn't already been defined. */ + +#ifndef NULL +#define NULL 0 +#endif + +#ifndef GENERIC_PTR +#if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) +#define GENERIC_PTR void * +#else +#define GENERIC_PTR char * +#endif +#endif + +#ifndef NULL_PTR +#define NULL_PTR ((GENERIC_PTR)0) +#endif + +extern char *xmalloc (); + +#ifndef CHAR_TYPE_SIZE +#define CHAR_TYPE_SIZE BITS_PER_UNIT +#endif + +#ifndef INT_TYPE_SIZE +#define INT_TYPE_SIZE BITS_PER_WORD +#endif + +#ifndef LONG_TYPE_SIZE +#define LONG_TYPE_SIZE BITS_PER_WORD +#endif + +#ifndef WCHAR_TYPE_SIZE +#define WCHAR_TYPE_SIZE INT_TYPE_SIZE +#endif + +#ifndef MAX_CHAR_TYPE_SIZE +#define MAX_CHAR_TYPE_SIZE CHAR_TYPE_SIZE +#endif + +#ifndef MAX_INT_TYPE_SIZE +#define MAX_INT_TYPE_SIZE INT_TYPE_SIZE +#endif + +#ifndef MAX_LONG_TYPE_SIZE +#define MAX_LONG_TYPE_SIZE LONG_TYPE_SIZE +#endif + +#ifndef MAX_WCHAR_TYPE_SIZE +#define MAX_WCHAR_TYPE_SIZE WCHAR_TYPE_SIZE +#endif + +/* Yield nonzero if adding two numbers with A's and B's signs can yield a + number with SUM's sign, where A, B, and SUM are all C integers. */ +#define possible_sum_sign(a, b, sum) ((((a) ^ (b)) | ~ ((a) ^ (sum))) < 0) + +static void integer_overflow (); +static long left_shift (); +static long right_shift (); + +#define ERROR 299 +#define OROR 300 +#define ANDAND 301 +#define EQUAL 302 +#define NOTEQUAL 303 +#define LEQ 304 +#define GEQ 305 +#define LSH 306 +#define RSH 307 +#define NAME 308 +#define INT 309 +#define CHAR 310 + +#define LEFT_OPERAND_REQUIRED 1 +#define RIGHT_OPERAND_REQUIRED 2 +#define HAVE_VALUE 4 +/*#define UNSIGNEDP 8*/ + +struct operation { + short op; + char rprio; /* Priority of op (relative to it right operand). */ + char flags; + char unsignedp; /* true if value should be treated as unsigned */ + long value; /* The value logically "right" of op. */ +}; + +/* Take care of parsing a number (anything that starts with a digit). + LEN is the number of characters in it. */ + +/* maybe needs to actually deal with floating point numbers */ + +struct operation +parse_number (pfile, start, olen) + cpp_reader *pfile; + char *start; + int olen; +{ + struct operation op; + register char *p = start; + register int c; + register unsigned long n = 0, nd, ULONG_MAX_over_base; + register int base = 10; + register int len = olen; + register int overflow = 0; + register int digit, largest_digit = 0; + int spec_long = 0; + + op.unsignedp = 0; + + for (c = 0; c < len; c++) + if (p[c] == '.') { + /* It's a float since it contains a point. */ + cpp_error (pfile, + "floating point numbers not allowed in #if expressions"); + op.op = ERROR; + return op; + } + + if (len >= 3 && (!strncmp (p, "0x", 2) || !strncmp (p, "0X", 2))) { + p += 2; + base = 16; + len -= 2; + } + else if (*p == '0') + base = 8; + + ULONG_MAX_over_base = (unsigned long) -1 / base; +/* start-sanitize-mpw */ + /* Work around yet another MPW C bug. */ +#ifdef MPW_C + ULONG_MAX_over_base = ((unsigned long) -1) / ((unsigned long) base); +#endif /* MPW_C */ +/* end-sanitize-mpw */ + + for (; len > 0; len--) { + c = *p++; + + if (c >= '0' && c <= '9') + digit = c - '0'; + else if (base == 16 && c >= 'a' && c <= 'f') + digit = c - 'a' + 10; + else if (base == 16 && c >= 'A' && c <= 'F') + digit = c - 'A' + 10; + else { + /* `l' means long, and `u' means unsigned. */ + while (1) { + if (c == 'l' || c == 'L') + { + if (spec_long) + cpp_error (pfile, "two `l's in integer constant"); + spec_long = 1; + } + else if (c == 'u' || c == 'U') + { + if (op.unsignedp) + cpp_error (pfile, "two `u's in integer constant"); + op.unsignedp = 1; + } + else + break; + + if (--len == 0) + break; + c = *p++; + } + /* Don't look for any more digits after the suffixes. */ + break; + } + if (largest_digit < digit) + largest_digit = digit; + nd = n * base + digit; + overflow |= ULONG_MAX_over_base < n | nd < n; + n = nd; + } + + if (len != 0) + { + cpp_error (pfile, "Invalid number in #if expression"); + op.op = ERROR; + return op; + } + + if (base <= largest_digit) + cpp_warning (pfile, "integer constant contains digits beyond the radix"); + + if (overflow) + cpp_warning (pfile, "integer constant out of range"); + + /* If too big to be signed, consider it unsigned. */ + if ((long) n < 0 && ! op.unsignedp) + { + if (base == 10) + cpp_warning (pfile, "integer constant is so large that it is unsigned"); + op.unsignedp = 1; + } + + op.value = n; + op.op = INT; + return op; +} + +struct token { + char *operator; + int token; +}; + +static struct token tokentab2[] = { + {"&&", ANDAND}, + {"||", OROR}, + {"<<", LSH}, + {">>", RSH}, + {"==", EQUAL}, + {"!=", NOTEQUAL}, + {"<=", LEQ}, + {">=", GEQ}, + {"++", ERROR}, + {"--", ERROR}, + {NULL, ERROR} +}; + +/* Read one token. */ + +struct operation +cpp_lex (pfile) +cpp_reader *pfile; +{ + register int c; + register int namelen; + register struct token *toktab; + enum cpp_token token; + struct operation op; + U_CHAR *tok_start, *tok_end; + int old_written; + + retry: + + c = CPP_BUF_PEEK (CPP_BUFFER (pfile)); + if (c == '#') + return parse_number (pfile, + cpp_read_check_assertion (pfile) ? "1" : "0", 1); + + old_written = CPP_WRITTEN (pfile); + cpp_skip_hspace (pfile); + if (c == '\n') + { + op.op = 0; + return op; + } + + token = cpp_get_token (pfile); + tok_start = pfile->token_buffer + old_written; + tok_end = CPP_PWRITTEN (pfile); + pfile->limit = tok_start; + switch (token) + { + case CPP_EOF: /* Should not happen ... */ + op.op = 0; + return op; + case CPP_VSPACE: + case CPP_POP: + if (CPP_BUFFER (pfile)->fname != NULL) + { + op.op = 0; + return op; + } + goto retry; + case CPP_HSPACE: case CPP_COMMENT: + goto retry; + case CPP_NUMBER: + return parse_number (pfile, tok_start, tok_end - tok_start); + case CPP_STRING: + cpp_error (pfile, "string constants not allowed in #if expressions"); + op.op = ERROR; + return op; + case CPP_CHAR: + /* This code for reading a character constant + handles multicharacter constants and wide characters. + It is mostly copied from c-lex.c. */ + { + register int result = 0; + register num_chars = 0; + unsigned width = MAX_CHAR_TYPE_SIZE; + int wide_flag = 0; + int max_chars; + U_CHAR *ptr = tok_start; +#ifdef MULTIBYTE_CHARS + char token_buffer[MAX_LONG_TYPE_SIZE/MAX_CHAR_TYPE_SIZE + MB_CUR_MAX]; +#else + char token_buffer[MAX_LONG_TYPE_SIZE/MAX_CHAR_TYPE_SIZE + 1]; +#endif + + if (*ptr == 'L') + { + ptr++; + wide_flag = 1; + width = MAX_WCHAR_TYPE_SIZE; +#ifdef MULTIBYTE_CHARS + max_chars = MB_CUR_MAX; +#else + max_chars = 1; +#endif + } + else + max_chars = MAX_LONG_TYPE_SIZE / width; + + while (1) + { + if (ptr >= CPP_PWRITTEN (pfile) || (c = *ptr++) == '\'') + break; + + if (c == '\\') + { + c = cpp_parse_escape (pfile, &ptr); + if (width < HOST_BITS_PER_INT + && (unsigned) c >= (1 << width)) + cpp_pedwarn (pfile, + "escape sequence out of range for character"); + } + + num_chars++; + + /* Merge character into result; ignore excess chars. */ + if (num_chars < max_chars + 1) + { + if (width < HOST_BITS_PER_INT) + result = (result << width) | (c & ((1 << width) - 1)); + else + result = c; + token_buffer[num_chars - 1] = c; + } + } + + token_buffer[num_chars] = 0; + + if (c != '\'') + cpp_error (pfile, "malformatted character constant"); + else if (num_chars == 0) + cpp_error (pfile, "empty character constant"); + else if (num_chars > max_chars) + { + num_chars = max_chars; + cpp_error (pfile, "character constant too long"); + } + else if (num_chars != 1 && ! CPP_TRADITIONAL (pfile)) + cpp_warning (pfile, "multi-character character constant"); + + /* If char type is signed, sign-extend the constant. */ + if (! wide_flag) + { + int num_bits = num_chars * width; + + if (cpp_lookup (pfile, "__CHAR_UNSIGNED__", + sizeof ("__CHAR_UNSIGNED__")-1, -1) + || ((result >> (num_bits - 1)) & 1) == 0) + op.value + = result & ((unsigned long) ~0 >> (HOST_BITS_PER_LONG - num_bits)); + else + op.value + = result | ~((unsigned long) ~0 >> (HOST_BITS_PER_LONG - num_bits)); + } + else + { +#ifdef MULTIBYTE_CHARS + /* Set the initial shift state and convert the next sequence. */ + result = 0; + /* In all locales L'\0' is zero and mbtowc will return zero, + so don't use it. */ + if (num_chars > 1 + || (num_chars == 1 && token_buffer[0] != '\0')) + { + wchar_t wc; + (void) mbtowc (NULL_PTR, NULL_PTR, 0); + if (mbtowc (& wc, token_buffer, num_chars) == num_chars) + result = wc; + else + cpp_warning (pfile,"Ignoring invalid multibyte character"); + } +#endif + op.value = result; + } + } + + /* This is always a signed type. */ + op.unsignedp = 0; + op.op = CHAR; + + return op; + + case CPP_NAME: + return parse_number (pfile, "0", 0); + + case CPP_OTHER: + /* See if it is a special token of length 2. */ + if (tok_start + 2 == tok_end) + { + for (toktab = tokentab2; toktab->operator != NULL; toktab++) + if (tok_start[0] == toktab->operator[0] + && tok_start[1] == toktab->operator[1]) + break; + if (toktab->token == ERROR) + { + char *buf = (char *) alloca (40); + sprintf (buf, "`%s' not allowed in operand of `#if'", tok_start); + cpp_error (pfile, buf); + } + op.op = toktab->token; + return op; + } + /* fall through */ + default: + op.op = *tok_start; + return op; + } +} + + +/* Parse a C escape sequence. STRING_PTR points to a variable + containing a pointer to the string to parse. That pointer + is updated past the characters we use. The value of the + escape sequence is returned. + + A negative value means the sequence \ newline was seen, + which is supposed to be equivalent to nothing at all. + + If \ is followed by a null character, we return a negative + value and leave the string pointer pointing at the null character. + + If \ is followed by 000, we return 0 and leave the string pointer + after the zeros. A value of 0 does not mean end of string. */ + +int +cpp_parse_escape (pfile, string_ptr) + cpp_reader *pfile; + char **string_ptr; +{ + register int c = *(*string_ptr)++; + switch (c) + { + case 'a': + return TARGET_BELL; + case 'b': + return TARGET_BS; + case 'e': + case 'E': + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "non-ANSI-standard escape sequence, `\\%c'", c); + return 033; + case 'f': + return TARGET_FF; + case 'n': + return TARGET_NEWLINE; + case 'r': + return TARGET_CR; + case 't': + return TARGET_TAB; + case 'v': + return TARGET_VT; + case '\n': + return -2; + case 0: + (*string_ptr)--; + return 0; + + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + { + register int i = c - '0'; + register int count = 0; + while (++count < 3) + { + c = *(*string_ptr)++; + if (c >= '0' && c <= '7') + i = (i << 3) + c - '0'; + else + { + (*string_ptr)--; + break; + } + } + if ((i & ~((1 << MAX_CHAR_TYPE_SIZE) - 1)) != 0) + { + i &= (1 << MAX_CHAR_TYPE_SIZE) - 1; + cpp_warning (pfile, + "octal character constant does not fit in a byte"); + } + return i; + } + case 'x': + { + register unsigned i = 0, overflow = 0, digits_found = 0, digit; + for (;;) + { + c = *(*string_ptr)++; + if (c >= '0' && c <= '9') + digit = c - '0'; + else if (c >= 'a' && c <= 'f') + digit = c - 'a' + 10; + else if (c >= 'A' && c <= 'F') + digit = c - 'A' + 10; + else + { + (*string_ptr)--; + break; + } + overflow |= i ^ (i << 4 >> 4); + i = (i << 4) + digit; + digits_found = 1; + } + if (!digits_found) + cpp_error (pfile, "\\x used with no following hex digits"); + if (overflow | (i & ~((1 << BITS_PER_UNIT) - 1))) + { + i &= (1 << BITS_PER_UNIT) - 1; + cpp_warning (pfile, + "hex character constant does not fit in a byte"); + } + return i; + } + default: + return c; + } +} + +static void +integer_overflow (pfile) + cpp_reader *pfile; +{ + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "integer overflow in preprocessor expression"); +} + +static long +left_shift (pfile, a, unsignedp, b) + cpp_reader *pfile; + long a; + int unsignedp; + unsigned long b; +{ + if (b >= HOST_BITS_PER_LONG) + { + if (! unsignedp && a != 0) + integer_overflow (pfile); + return 0; + } + else if (unsignedp) + return (unsigned long) a << b; + else + { + long l = a << b; + if (l >> b != a) + integer_overflow (pfile); + return l; + } +} + +static long +right_shift (pfile, a, unsignedp, b) + cpp_reader *pfile; + long a; + int unsignedp; + unsigned long b; +{ + if (b >= HOST_BITS_PER_LONG) + return unsignedp ? 0 : a >> (HOST_BITS_PER_LONG - 1); + else if (unsignedp) + return (unsigned long) a >> b; + else + return a >> b; +} + +/* These priorities are all even, so we can handle associatively. */ +#define PAREN_INNER_PRIO 0 +#define COMMA_PRIO 4 +#define COND_PRIO (COMMA_PRIO+2) +#define OROR_PRIO (COND_PRIO+2) +#define ANDAND_PRIO (OROR_PRIO+2) +#define OR_PRIO (ANDAND_PRIO+2) +#define XOR_PRIO (OR_PRIO+2) +#define AND_PRIO (XOR_PRIO+2) +#define EQUAL_PRIO (AND_PRIO+2) +#define LESS_PRIO (EQUAL_PRIO+2) +#define SHIFT_PRIO (LESS_PRIO+2) +#define PLUS_PRIO (SHIFT_PRIO+2) +#define MUL_PRIO (PLUS_PRIO+2) +#define UNARY_PRIO (MUL_PRIO+2) +#define PAREN_OUTER_PRIO (UNARY_PRIO+2) + +#define COMPARE(OP) \ + top->unsignedp = 0;\ + top->value = (unsigned1 || unsigned2) ? (unsigned long) v1 OP v2 : (v1 OP v2) + +/* Parse and evaluate a C expression, reading from PFILE. + Returns the value of the expression. */ + +long +cpp_parse_expr (pfile) + cpp_reader *pfile; +{ + /* The implementation is an operator precedence parser, + i.e. a bottom-up parser, using a stack for not-yet-reduced tokens. + + The stack base is 'stack', and the current stack pointer is 'top'. + There is a stack element for each operator (only), + and the most recently pushed operator is 'top->op'. + An operand (value) is stored in the 'value' field of the stack + element of the operator that precedes it. + In that case the 'flags' field has the HAVE_VALUE flag set. */ + +#define INIT_STACK_SIZE 20 + struct operation init_stack[INIT_STACK_SIZE]; + struct operation *stack = init_stack; + struct operation *limit = stack + INIT_STACK_SIZE; + register struct operation *top = stack; + int lprio, rprio; + + top->rprio = 0; + top->flags = 0; + for (;;) + { + struct operation op; + char flags = 0; + + /* Read a token */ + op = cpp_lex (pfile); + + /* See if the token is an operand, in which case go to set_value. + If the token is an operator, figure out its left and right + priorities, and then goto maybe_reduce. */ + + switch (op.op) + { + case NAME: + top->value = 0, top->unsignedp = 0; + goto set_value; + case INT: case CHAR: + top->value = op.value; + top->unsignedp = op.unsignedp; + goto set_value; + case 0: + lprio = 0; goto maybe_reduce; + case '+': case '-': + /* Is this correct if unary ? FIXME */ + flags = RIGHT_OPERAND_REQUIRED; + lprio = PLUS_PRIO; rprio = lprio + 1; goto maybe_reduce; + case '!': case '~': + flags = RIGHT_OPERAND_REQUIRED; + rprio = UNARY_PRIO; lprio = rprio + 1; goto maybe_reduce; + case '*': case '/': case '%': + lprio = MUL_PRIO; goto binop; + case '<': case '>': case LEQ: case GEQ: + lprio = LESS_PRIO; goto binop; + case EQUAL: case NOTEQUAL: + lprio = EQUAL_PRIO; goto binop; + case LSH: case RSH: + lprio = SHIFT_PRIO; goto binop; + case '&': lprio = AND_PRIO; goto binop; + case '^': lprio = XOR_PRIO; goto binop; + case '|': lprio = OR_PRIO; goto binop; + case ANDAND: lprio = ANDAND_PRIO; goto binop; + case OROR: lprio = OROR_PRIO; goto binop; + case ',': + lprio = COMMA_PRIO; goto binop; + case '(': + lprio = PAREN_OUTER_PRIO; rprio = PAREN_INNER_PRIO; + goto maybe_reduce; + case ')': + lprio = PAREN_INNER_PRIO; rprio = PAREN_OUTER_PRIO; + goto maybe_reduce; + case ':': + lprio = COND_PRIO; rprio = COND_PRIO; + goto maybe_reduce; + case '?': + lprio = COND_PRIO + 1; rprio = COND_PRIO; + goto maybe_reduce; + binop: + flags = LEFT_OPERAND_REQUIRED|RIGHT_OPERAND_REQUIRED; + rprio = lprio + 1; + goto maybe_reduce; + default: + cpp_error (pfile, "invalid character in #if"); + goto syntax_error; + } + + set_value: + /* Push a value onto the stack. */ + if (top->flags & HAVE_VALUE) + { + cpp_error (pfile, "syntax error in #if"); + goto syntax_error; + } + top->flags |= HAVE_VALUE; + continue; + + maybe_reduce: + /* Push an operator, and check if we can reduce now. */ + while (top->rprio > lprio) + { + long v1 = top[-1].value, v2 = top[0].value; + int unsigned1 = top[-1].unsignedp, unsigned2 = top[0].unsignedp; + top--; + if ((top[1].flags & LEFT_OPERAND_REQUIRED) + && ! (top[0].flags & HAVE_VALUE)) + { + cpp_error (pfile, "syntax error - missing left operand"); + goto syntax_error; + } + if ((top[1].flags & RIGHT_OPERAND_REQUIRED) + && ! (top[1].flags & HAVE_VALUE)) + { + cpp_error (pfile, "syntax error - missing right operand"); + goto syntax_error; + } + /* top[0].value = (top[1].op)(v1, v2);*/ + switch (top[1].op) + { + case '+': + if (!(top->flags & HAVE_VALUE)) + { /* Unary '+' */ + top->value = v2; + top->unsignedp = unsigned2; + top->flags |= HAVE_VALUE; + } + else + { + top->value = v1 + v2; + top->unsignedp = unsigned1 || unsigned2; + if (! top->unsignedp + && ! possible_sum_sign (v1, v2, top->value)) + integer_overflow (pfile); + } + break; + case '-': + if (!(top->flags & HAVE_VALUE)) + { /* Unary '-' */ + top->value = - v2; + if ((top->value & v2) < 0 && ! unsigned2) + integer_overflow (pfile); + top->unsignedp = unsigned2; + top->flags |= HAVE_VALUE; + } + else + { /* Binary '-' */ + top->value = v1 - v2; + top->unsignedp = unsigned1 || unsigned2; + if (! top->unsignedp + && ! possible_sum_sign (top->value, v2, v1)) + integer_overflow (pfile); + } + break; + case '*': + top->unsignedp = unsigned1 || unsigned2; + if (top->unsignedp) + top->value = (unsigned long) v1 * v2; + else + { + top->value = v1 * v2; + if (v1 + && (top->value / v1 != v2 + || (top->value & v1 & v2) < 0)) + integer_overflow (pfile); + } + break; + case '/': + if (v2 == 0) + { + cpp_error (pfile, "division by zero in #if"); + v2 = 1; + } + top->unsignedp = unsigned1 || unsigned2; + if (top->unsignedp) + top->value = (unsigned long) v1 / v2; + else + { + top->value = v1 / v2; + if ((top->value & v1 & v2) < 0) + integer_overflow (pfile); + } + break; + case '%': + if (v2 == 0) + { + cpp_error (pfile, "division by zero in #if"); + v2 = 1; + } + top->unsignedp = unsigned1 || unsigned2; + if (top->unsignedp) + top->value = (unsigned long) v1 % v2; + else + top->value = v1 % v2; + break; + case '!': + if (top->flags & HAVE_VALUE) + { + cpp_error (pfile, "syntax error"); + goto syntax_error; + } + top->value = ! v2; + top->unsignedp = 0; + top->flags |= HAVE_VALUE; + break; + case '~': + if (top->flags & HAVE_VALUE) + { + cpp_error (pfile, "syntax error"); + goto syntax_error; + } + top->value = ~ v2; + top->unsignedp = unsigned2; + top->flags |= HAVE_VALUE; + break; + case '<': COMPARE(<); break; + case '>': COMPARE(>); break; + case LEQ: COMPARE(<=); break; + case GEQ: COMPARE(>=); break; + case EQUAL: + top->value = (v1 == v2); + top->unsignedp = 0; + break; + case NOTEQUAL: + top->value = (v1 != v2); + top->unsignedp = 0; + break; + case LSH: + top->unsignedp = unsigned1; + if (v2 < 0 && ! unsigned2) + top->value = right_shift (pfile, v1, unsigned1, -v2); + else + top->value = left_shift (pfile, v1, unsigned1, v2); + break; + case RSH: + top->unsignedp = unsigned1; + if (v2 < 0 && ! unsigned2) + top->value = left_shift (pfile, v1, unsigned1, -v2); + else + top->value = right_shift (pfile, v1, unsigned1, v2); + break; +#define LOGICAL(OP) \ + top->value = v1 OP v2;\ + top->unsignedp = unsigned1 || unsigned2; + case '&': LOGICAL(&); break; + case '^': LOGICAL(^); break; + case '|': LOGICAL(|); break; + case ANDAND: + top->value = v1 && v2; top->unsignedp = 0; break; + case OROR: + top->value = v1 || v2; top->unsignedp = 0; break; + case ',': + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "comma operator in operand of `#if'"); + top->value = v2; + top->unsignedp = unsigned2; + break; + case '(': case '?': + cpp_error (pfile, "syntax error in #if"); + goto syntax_error; + case ':': + if (top[0].op != '?') + { + cpp_error (pfile, + "syntax error ':' without preceding '?'"); + goto syntax_error; + } + else if (! (top[1].flags & HAVE_VALUE) + || !(top[-1].flags & HAVE_VALUE) + || !(top[0].flags & HAVE_VALUE)) + { + cpp_error (pfile, "bad syntax for ?: operator"); + goto syntax_error; + } + else + { + top--; + top->value = top->value ? v1 : v2; + top->unsignedp = unsigned1 || unsigned2; + } + break; + case ')': + if ((top[1].flags & HAVE_VALUE) + || ! (top[0].flags & HAVE_VALUE) + || top[0].op != '(' + || (top[-1].flags & HAVE_VALUE)) + { + cpp_error (pfile, "mismatched parentheses in #if"); + goto syntax_error; + } + else + { + top--; + top->value = v1; + top->unsignedp = unsigned1; + top->flags |= HAVE_VALUE; + } + break; + default: + fprintf (stderr, + top[1].op >= ' ' && top[1].op <= '~' + ? "unimplemented operator '%c'\n" + : "unimplemented operator '\\%03o'\n", + top[1].op); + } + } + if (op.op == 0) + { + if (top != stack) + cpp_error (pfile, "internal error in #if expression"); + if (stack != init_stack) + free (stack); + return top->value; + } + top++; + + /* Check for and handle stack overflow. */ + if (top == limit) + { + struct operation *new_stack; + int old_size = (char*)limit - (char*)stack; + int new_size = 2 * old_size; + if (stack != init_stack) + new_stack = (struct operation*) xrealloc (stack, new_size); + else + { + new_stack = (struct operation*) xmalloc (new_size); + bcopy (stack, new_stack, old_size); + } + stack = new_stack; + top = (struct operation*)((char*) new_stack + old_size); + limit = (struct operation*)((char*) new_stack + new_size); + } + + top->flags = flags; + top->rprio = rprio; + top->op = op.op; + } + syntax_error: + if (stack != init_stack) + free (stack); + skip_rest_of_line (pfile); + return 0; +} diff --git a/gcc/cpphash.c b/gcc/cpphash.c new file mode 100644 index 00000000000..fe7cbbf15f1 --- /dev/null +++ b/gcc/cpphash.c @@ -0,0 +1,192 @@ +/* Part of CPP library. (Macro hash table support.) + Copyright (C) 1986, 87, 89, 92, 93, 94, 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994. + Based on CCCP program by by Paul Rubin, June 1986 + Adapted to ANSI C, Richard Stallman, Jan 1987 + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#include "cpplib.h" +#include "cpphash.h" + +/* Define a generic NULL if one hasn't already been defined. */ + +#ifndef NULL +#define NULL 0 +#endif + +/* + * return hash function on name. must be compatible with the one + * computed a step at a time, elsewhere + */ +int +hashf (name, len, hashsize) + register const U_CHAR *name; + register int len; + int hashsize; +{ + register int r = 0; + + while (len--) + r = HASHSTEP (r, *name++); + + return MAKE_POS (r) % hashsize; +} + +/* + * find the most recent hash node for name name (ending with first + * non-identifier char) installed by install + * + * If LEN is >= 0, it is the length of the name. + * Otherwise, compute the length by scanning the entire name. + * + * If HASH is >= 0, it is the precomputed hash code. + * Otherwise, compute the hash code. + */ +HASHNODE * +cpp_lookup (pfile, name, len, hash) + struct parse_file *pfile; + const U_CHAR *name; + int len; + int hash; +{ + register const U_CHAR *bp; + register HASHNODE *bucket; + + if (len < 0) + { + for (bp = name; is_idchar[*bp]; bp++) ; + len = bp - name; + } + + if (hash < 0) + hash = hashf (name, len, HASHSIZE); + + bucket = hashtab[hash]; + while (bucket) { + if (bucket->length == len && strncmp (bucket->name, name, len) == 0) + return bucket; + bucket = bucket->next; + } + return (HASHNODE*) 0; +} + +/* + * Delete a hash node. Some weirdness to free junk from macros. + * More such weirdness will have to be added if you define more hash + * types that need it. + */ + +/* Note that the DEFINITION of a macro is removed from the hash table + but its storage is not freed. This would be a storage leak + except that it is not reasonable to keep undefining and redefining + large numbers of macros many times. + In any case, this is necessary, because a macro can be #undef'd + in the middle of reading the arguments to a call to it. + If #undef freed the DEFINITION, that would crash. */ + +void +delete_macro (hp) + HASHNODE *hp; +{ + + if (hp->prev != NULL) + hp->prev->next = hp->next; + if (hp->next != NULL) + hp->next->prev = hp->prev; + + /* make sure that the bucket chain header that + the deleted guy was on points to the right thing afterwards. */ + if (hp == *hp->bucket_hdr) + *hp->bucket_hdr = hp->next; + +#if 0 + if (hp->type == T_MACRO) { + DEFINITION *d = hp->value.defn; + struct reflist *ap, *nextap; + + for (ap = d->pattern; ap != NULL; ap = nextap) { + nextap = ap->next; + free (ap); + } + free (d); + } +#endif + free (hp); +} +/* + * install a name in the main hash table, even if it is already there. + * name stops with first non alphanumeric, except leading '#'. + * caller must check against redefinition if that is desired. + * delete_macro () removes things installed by install () in fifo order. + * this is important because of the `defined' special symbol used + * in #if, and also if pushdef/popdef directives are ever implemented. + * + * If LEN is >= 0, it is the length of the name. + * Otherwise, compute the length by scanning the entire name. + * + * If HASH is >= 0, it is the precomputed hash code. + * Otherwise, compute the hash code. + */ +HASHNODE * +install (name, len, type, ivalue, value, hash) + U_CHAR *name; + int len; + enum node_type type; + int ivalue; + char *value; + int hash; +{ + register HASHNODE *hp; + register int i, bucket; + register U_CHAR *p, *q; + + if (len < 0) { + p = name; + while (is_idchar[*p]) + p++; + len = p - name; + } + + if (hash < 0) + hash = hashf (name, len, HASHSIZE); + + i = sizeof (HASHNODE) + len + 1; + hp = (HASHNODE *) xmalloc (i); + bucket = hash; + hp->bucket_hdr = &hashtab[bucket]; + hp->next = hashtab[bucket]; + hashtab[bucket] = hp; + hp->prev = NULL; + if (hp->next != NULL) + hp->next->prev = hp; + hp->type = type; + hp->length = len; + if (hp->type == T_CONST) + hp->value.ival = ivalue; + else + hp->value.cpval = value; + hp->name = ((U_CHAR *) hp) + sizeof (HASHNODE); + p = hp->name; + q = name; + for (i = 0; i < len; i++) + *p++ = *q++; + hp->name[len] = 0; + return hp; +} diff --git a/gcc/cpphash.h b/gcc/cpphash.h new file mode 100644 index 00000000000..b4d72078208 --- /dev/null +++ b/gcc/cpphash.h @@ -0,0 +1,40 @@ +enum node_type; + +/* different kinds of things that can appear in the value field + of a hash node. Actually, this may be useless now. */ +union hashval { + int ival; + char *cpval; + DEFINITION *defn; +#if 0 + KEYDEF *keydef; +#endif +}; + +struct hashnode { + struct hashnode *next; /* double links for easy deletion */ + struct hashnode *prev; + struct hashnode **bucket_hdr; /* also, a back pointer to this node's hash + chain is kept, in case the node is the head + of the chain and gets deleted. */ + enum node_type type; /* type of special token */ + int length; /* length of token, for quick comparison */ + U_CHAR *name; /* the actual name */ + union hashval value; /* pointer to expansion, or whatever */ +}; + +typedef struct hashnode HASHNODE; + +/* Some definitions for the hash table. The hash function MUST be + computed as shown in hashf () below. That is because the rescan + loop computes the hash value `on the fly' for most tokens, + in order to avoid the overhead of a lot of procedure calls to + the hashf () function. Hashf () only exists for the sake of + politeness, for use when speed isn't so important. */ + +#define HASHSIZE 1403 +static HASHNODE *hashtab[HASHSIZE]; +#define HASHSTEP(old, c) ((old << 2) + c) +#define MAKE_POS(v) (v & 0x7fffffff) /* make number positive */ + +extern HASHNODE* install PARAMS ((U_CHAR*,int,enum node_type, int,char*,int)); diff --git a/gcc/cpplib.c b/gcc/cpplib.c new file mode 100644 index 00000000000..6c4e555debf --- /dev/null +++ b/gcc/cpplib.c @@ -0,0 +1,7288 @@ +/* CPP Library. + Copyright (C) 1986, 87, 89, 92, 93, 94, 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994-95. + Based on CCCP program by by Paul Rubin, June 1986 + Adapted to ANSI C, Richard Stallman, Jan 1987 + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#ifdef EMACS +#define NO_SHORTNAMES +#include "../src/config.h" +#ifdef open +#undef open +#undef read +#undef write +#endif /* open */ +#endif /* EMACS */ + +/* The macro EMACS is defined when cpp is distributed as part of Emacs, + for the sake of machines with limited C compilers. */ +#ifndef EMACS +#include "config.h" +#endif /* not EMACS */ + +#ifndef STANDARD_INCLUDE_DIR +#define STANDARD_INCLUDE_DIR "/usr/include" +#endif + +#ifndef LOCAL_INCLUDE_DIR +#define LOCAL_INCLUDE_DIR "/usr/local/include" +#endif + +#if 0 /* We can't get ptrdiff_t, so I arranged not to need PTR_INT_TYPE. */ +#ifdef __STDC__ +#define PTR_INT_TYPE ptrdiff_t +#else +#define PTR_INT_TYPE long +#endif +#endif /* 0 */ + +#include "cpplib.h" +#include "cpphash.h" + +#ifndef STDC_VALUE +#define STDC_VALUE 1 +#endif + +/* By default, colon separates directories in a path. */ +#ifndef PATH_SEPARATOR +#define PATH_SEPARATOR ':' +#endif + +/* In case config.h defines these. */ +#undef bcopy +#undef bzero +#undef bcmp + +#include <sys/types.h> +#include <sys/stat.h> +#include <ctype.h> +#include <stdio.h> +#include <signal.h> +#ifdef __STDC__ +#include <string.h> +#include <stdlib.h> +#endif + +#ifndef VMS +#ifndef USG +#include <sys/time.h> /* for __DATE__ and __TIME__ */ +#include <sys/resource.h> +#else +#include <sys/param.h> /* CYGNUS LOCAL: shebs -noquiet */ +#include <sys/times.h> +#include <time.h> +#include <fcntl.h> +#endif /* USG */ +#endif /* not VMS */ + +/* This defines "errno" properly for VMS, and gives us EACCES. */ +#include <errno.h> + +extern char *index (); +extern char *rindex (); + +#ifndef O_RDONLY +#define O_RDONLY 0 +#endif + +#undef MIN +#undef MAX +#define MIN(X,Y) ((X) < (Y) ? (X) : (Y)) +#define MAX(X,Y) ((X) > (Y) ? (X) : (Y)) + +/* Find the largest host integer type and set its size and type. */ + +#ifndef HOST_BITS_PER_WIDE_INT + +#if HOST_BITS_PER_LONG > HOST_BITS_PER_INT +#define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_LONG +#define HOST_WIDE_INT long +#else +#define HOST_BITS_PER_WIDE_INT HOST_BITS_PER_INT +#define HOST_WIDE_INT int +#endif + +#endif + +#ifndef S_ISREG +#define S_ISREG(m) (((m) & S_IFMT) == S_IFREG) +#endif + +#ifndef S_ISDIR +#define S_ISDIR(m) (((m) & S_IFMT) == S_IFDIR) +#endif + +/* Define a generic NULL if one hasn't already been defined. */ + +#ifndef NULL +#define NULL 0 +#endif + +#ifndef GENERIC_PTR +#if defined (USE_PROTOTYPES) ? USE_PROTOTYPES : defined (__STDC__) +#define GENERIC_PTR void * +#else +#define GENERIC_PTR char * +#endif +#endif + +#ifndef NULL_PTR +#define NULL_PTR ((GENERIC_PTR)0) +#endif + +#ifndef INCLUDE_LEN_FUDGE +#define INCLUDE_LEN_FUDGE 0 +#endif + +/* Symbols to predefine. */ + +#ifdef CPP_PREDEFINES +static char *predefs = CPP_PREDEFINES; +#else +static char *predefs = ""; +#endif + +/* We let tm.h override the types used here, to handle trivial differences + such as the choice of unsigned int or long unsigned int for size_t. + When machines start needing nontrivial differences in the size type, + it would be best to do something here to figure out automatically + from other information what type to use. */ + +/* The string value for __SIZE_TYPE__. */ + +#ifndef SIZE_TYPE +#define SIZE_TYPE "long unsigned int" +#endif + +/* The string value for __PTRDIFF_TYPE__. */ + +#ifndef PTRDIFF_TYPE +#define PTRDIFF_TYPE "long int" +#endif + +/* The string value for __WCHAR_TYPE__. */ + +#ifndef WCHAR_TYPE +#define WCHAR_TYPE "int" +#endif +#define CPP_WCHAR_TYPE(PFILE) \ + (CPP_OPTIONS (PFILE)->cplusplus ? "__wchar_t" : WCHAR_TYPE) + +/* The string value for __USER_LABEL_PREFIX__ */ + +#ifndef USER_LABEL_PREFIX +#define USER_LABEL_PREFIX "" +#endif + +/* The string value for __REGISTER_PREFIX__ */ + +#ifndef REGISTER_PREFIX +#define REGISTER_PREFIX "" +#endif + +/* In the definition of a #assert name, this structure forms + a list of the individual values asserted. + Each value is itself a list of "tokens". + These are strings that are compared by name. */ + +struct tokenlist_list { + struct tokenlist_list *next; + struct arglist *tokens; +}; + +struct assertion_hashnode { + struct assertion_hashnode *next; /* double links for easy deletion */ + struct assertion_hashnode *prev; + /* also, a back pointer to this node's hash + chain is kept, in case the node is the head + of the chain and gets deleted. */ + struct assertion_hashnode **bucket_hdr; + int length; /* length of token, for quick comparison */ + U_CHAR *name; /* the actual name */ + /* List of token-sequences. */ + struct tokenlist_list *value; +}; + +#define SKIP_WHITE_SPACE(p) do { while (is_hor_space[*p]) p++; } while (0) +#define SKIP_ALL_WHITE_SPACE(p) do { while (is_space[*p]) p++; } while (0) + +#define PEEKN(N) (CPP_BUFFER (pfile)->rlimit - CPP_BUFFER (pfile)->cur >= (N) ? CPP_BUFFER (pfile)->cur[N] : EOF) +#define FORWARD(N) CPP_FORWARD (CPP_BUFFER (pfile), (N)) +#define GETC() CPP_BUF_GET (CPP_BUFFER (pfile)) +#define PEEKC() CPP_BUF_PEEK (CPP_BUFFER (pfile)) +/* CPP_IS_MACRO_BUFFER is true if the buffer contains macro expansion. + (Note that it is false while we're expanding marco *arguments*.) */ +#define CPP_IS_MACRO_BUFFER(PBUF) ((PBUF)->cleanup == macro_cleanup) + +/* Move all backslash-newline pairs out of embarrassing places. + Exchange all such pairs following BP + with any potentially-embarrassing characters that follow them. + Potentially-embarrassing characters are / and * + (because a backslash-newline inside a comment delimiter + would cause it not to be recognized). */ + +#define NEWLINE_FIX \ + do {while (PEEKC() == '\\' && PEEKN(1) == '\n') FORWARD(2); } while(0) + +/* Same, but assume we've already read the potential '\\' into C. */ +#define NEWLINE_FIX1(C) do { \ + while ((C) == '\\' && PEEKC() == '\n') { FORWARD(1); (C) = GETC(); }\ + } while(0) + +/* Name under which this program was invoked. */ + +char *progname; + +struct cpp_pending { + struct cpp_pending *next; + char *cmd; + char *arg; +}; + +/* Forward declarations. */ + +extern char *xmalloc (); + +static void add_import (); +static void append_include_chain (); +static void make_undef (); +static void make_definition (); +static void make_assertion (); +static void path_include (); +static void initialize_builtins (); +static void initialize_char_syntax (); +static void dump_arg_n (); +static void dump_defn_1 (); +extern void delete_macro (); +static void trigraph_pcp (); +static int finclude (); +static void validate_else (); +static int comp_def_part (); +extern void fancy_abort (); +static void pipe_closed (); +static void print_containing_files (); +static int lookup_import (); +static int redundant_include_p (); +static is_system_include (); +static struct file_name_map *read_name_map (); +static char *read_filename_string (); +static int open_include_file (); +static int check_preconditions (); +static void pcfinclude (); +static void pcstring_used (); +static int check_macro_name (); +static int compare_defs (); +static int compare_token_lists (); +static int eval_if_expression (); +static int change_newlines (); +static int line_for_error (); +extern int hashf (); +static int file_size_and_mode (); +static struct arglist *read_token_list (); +static void free_token_list (); +static int safe_read (); +static void push_macro_expansion PARAMS ((cpp_reader *, + U_CHAR*, int, HASHNODE*)); +extern char *xrealloc (); +extern char *xcalloc (); +static char *savestring (); + +static void conditional_skip (); +static void skip_if_group (); + +/* Last arg to output_line_command. */ +enum file_change_code {same_file, enter_file, leave_file}; + +/* External declarations. */ + +extern char *getenv (); +extern FILE *fdopen (); +extern char *version_string; +extern struct tm *localtime (); + +/* These functions are declared to return int instead of void since they + are going to be placed in a table and some old compilers have trouble with + pointers to functions returning void. */ + +static int do_define (); +static int do_line (); +static int do_include (); +static int do_undef (); +static int do_error (); +static int do_pragma (); +static int do_ident (); +static int do_if (); +static int do_xifdef (); +static int do_else (); +static int do_elif (); +static int do_endif (); +static int do_sccs (); +static int do_once (); +static int do_assert (); +static int do_unassert (); +static int do_warning (); + +struct file_name_list + { + struct file_name_list *next; + char *fname; + /* If the following is nonzero, it is a macro name. + Don't include the file again if that macro is defined. */ + U_CHAR *control_macro; + /* If the following is nonzero, it is a C-language system include + directory. */ + int c_system_include_path; + /* Mapping of file names for this directory. */ + struct file_name_map *name_map; + /* Non-zero if name_map is valid. */ + int got_name_map; + }; + +/* #include "file" looks in source file dir, then stack. */ +/* #include <file> just looks in the stack. */ +/* -I directories are added to the end, then the defaults are added. */ +/* The */ +static struct default_include { + char *fname; /* The name of the directory. */ + int cplusplus; /* Only look here if we're compiling C++. */ + int cxx_aware; /* Includes in this directory don't need to + be wrapped in extern "C" when compiling + C++. */ +} include_defaults_array[] +#ifdef INCLUDE_DEFAULTS + = INCLUDE_DEFAULTS; +#else + = { + /* Pick up GNU C++ specific include files. */ + { GPLUSPLUS_INCLUDE_DIR, 1, 1 }, +#ifdef CROSS_COMPILE + /* This is the dir for fixincludes. Put it just before + the files that we fix. */ + { GCC_INCLUDE_DIR, 0, 0 }, + /* For cross-compilation, this dir name is generated + automatically in Makefile.in. */ + { CROSS_INCLUDE_DIR, 0, 0 }, + /* This is another place that the target system's headers might be. */ + { TOOL_INCLUDE_DIR, 0, 1 }, +#else /* not CROSS_COMPILE */ + /* This should be /usr/local/include and should come before + the fixincludes-fixed header files. */ + { LOCAL_INCLUDE_DIR, 0, 1 }, + /* This is here ahead of GCC_INCLUDE_DIR because assert.h goes here. + Likewise, behind LOCAL_INCLUDE_DIR, where glibc puts its assert.h. */ + { TOOL_INCLUDE_DIR, 0, 1 }, + /* This is the dir for fixincludes. Put it just before + the files that we fix. */ + { GCC_INCLUDE_DIR, 0, 0 }, + /* Some systems have an extra dir of include files. */ +#ifdef SYSTEM_INCLUDE_DIR + { SYSTEM_INCLUDE_DIR, 0, 0 }, +#endif + { STANDARD_INCLUDE_DIR, 0, 0 }, +#endif /* not CROSS_COMPILE */ + { 0, 0, 0 } + }; +#endif /* no INCLUDE_DEFAULTS */ + +/* `struct directive' defines one #-directive, including how to handle it. */ + +struct directive { + int length; /* Length of name */ + int (*func)(); /* Function to handle directive */ + char *name; /* Name of directive */ + enum node_type type; /* Code which describes which directive. */ + char command_reads_line; /* One if rest of line is read by func. */ + char traditional_comments; /* Nonzero: keep comments if -traditional. */ + char pass_thru; /* Copy preprocessed directive to output file.*/ +}; + +/* Here is the actual list of #-directives, most-often-used first. + The initialize_builtins function assumes #define is the very first. */ + +static struct directive directive_table[] = { + { 6, do_define, "define", T_DEFINE, 0, 1}, + { 5, do_xifdef, "ifdef", T_IFDEF, 1}, + { 6, do_xifdef, "ifndef", T_IFNDEF, 1}, + { 7, do_include, "include", T_INCLUDE, 1}, + { 12, do_include, "include_next", T_INCLUDE_NEXT, 1}, + { 6, do_include, "import", T_IMPORT, 1}, + { 5, do_endif, "endif", T_ENDIF, 1}, + { 4, do_else, "else", T_ELSE, 1}, + { 2, do_if, "if", T_IF, 1}, + { 4, do_elif, "elif", T_ELIF, 1}, + { 5, do_undef, "undef", T_UNDEF}, + { 5, do_error, "error", T_ERROR}, + { 7, do_warning, "warning", T_WARNING}, + { 6, do_pragma, "pragma", T_PRAGMA, 0, 0, 1}, + { 4, do_line, "line", T_LINE, 1}, + { 5, do_ident, "ident", T_IDENT, 1, 0, 1}, +#ifdef SCCS_DIRECTIVE + { 4, do_sccs, "sccs", T_SCCS}, +#endif + { 6, do_assert, "assert", T_ASSERT, 1}, + { 8, do_unassert, "unassert", T_UNASSERT, 1}, + { -1, 0, "", T_UNUSED}, +}; + +/* table to tell if char can be part of a C identifier. */ +U_CHAR is_idchar[256]; +/* table to tell if char can be first char of a c identifier. */ +U_CHAR is_idstart[256]; +/* table to tell if c is horizontal space. */ +U_CHAR is_hor_space[256]; +/* table to tell if c is horizontal or vertical space. */ +static U_CHAR is_space[256]; + +/* Initialize syntactic classifications of characters. */ + +static void +initialize_char_syntax (opts) + struct cpp_options *opts; +{ + register int i; + + /* + * Set up is_idchar and is_idstart tables. These should be + * faster than saying (is_alpha (c) || c == '_'), etc. + * Set up these things before calling any routines tthat + * refer to them. + */ + for (i = 'a'; i <= 'z'; i++) { + is_idchar[i - 'a' + 'A'] = 1; + is_idchar[i] = 1; + is_idstart[i - 'a' + 'A'] = 1; + is_idstart[i] = 1; + } + for (i = '0'; i <= '9'; i++) + is_idchar[i] = 1; + is_idchar['_'] = 1; + is_idstart['_'] = 1; + is_idchar['$'] = opts->dollars_in_ident; + is_idstart['$'] = opts->dollars_in_ident; + + /* horizontal space table */ + is_hor_space[' '] = 1; + is_hor_space['\t'] = 1; + is_hor_space['\v'] = 1; + is_hor_space['\f'] = 1; + is_hor_space['\r'] = 1; + + is_space[' '] = 1; + is_space['\t'] = 1; + is_space['\v'] = 1; + is_space['\f'] = 1; + is_space['\n'] = 1; + is_space['\r'] = 1; +} + +/* + * Skip over a quoted string. BP points to the opening quote. + * Returns a pointer after the closing quote. Don't go past LIMIT. + * START_LINE is the line number of the starting point (but it need + * not be valid if the starting point is inside a macro expansion). + * + * The input stack state is not changed. + */ +static U_CHAR * +skip_quoted_string (pfile, first, start_line) + cpp_reader *pfile; + int first; + int start_line; +{ + int c; + + while (1) + { + c = GETC (); + if (c == EOF) + { + cpp_error_with_line (pfile, line_for_error (start_line), + "unterminated string or character constant"); +#if 0 + cpp_error_with_line (pfile, multiline_string_line, + "possible real start of unterminated constant"); + multiline_string_line = 0; +#endif + break; + } + if (c == '\\') + { + c = GETC (); + NEWLINE_FIX1(c); + } + else if (c == '\n') + { + if (CPP_TRADITIONAL (pfile)) + { + /* Unterminated strings and character constants are 'legal'. */ + FORWARD(-1); /* Don't consume the newline. */ + break; + } + if (CPP_PEDANTIC (pfile) || first == '\'') + { + cpp_error_with_line (pfile, line_for_error (start_line), + "unterminated string or character constant"); + FORWARD(-1); + break; + } + /* If not traditional, then allow newlines inside strings. */ +#if 0 + if (multiline_string_line == 0) + multiline_string_line = start_line; +#endif + } + else if (c == first) + break; + } +} + +/* Place into PFILE a quoted string representing the string SRC. + Caller must reserve enough space in pfile->token_buffer. */ +static void +quote_string (pfile, src) + cpp_reader *pfile; + char *src; +{ + U_CHAR c; + + CPP_PUTC_Q (pfile, '\"'); + for (;;) + switch ((c = *src++)) + { + default: + if (isprint (c)) + CPP_PUTC_Q (pfile, c); + else + { + sprintf (CPP_PWRITTEN (pfile), "\\%03o", c); + CPP_ADJUST_WRITTEN (pfile, 4); + } + break; + + case '\"': + case '\\': + CPP_PUTC_Q (pfile, '\\'); + CPP_PUTC_Q (pfile, c); + break; + + case '\0': + CPP_PUTC_Q (pfile, '\"'); + CPP_NUL_TERMINATE_Q (pfile); + return; + } +} + +/* Make sure PFILE->token_buffer will hold at least N more chars. */ + +void +cpp_grow_buffer (pfile, n) + cpp_reader *pfile; + long n; +{ + long old_written = CPP_WRITTEN (pfile); + pfile->token_buffer_size = n + 2 * pfile->token_buffer_size; + pfile->token_buffer = (char*) + xrealloc(pfile->token_buffer, pfile->token_buffer_size); + CPP_SET_WRITTEN (pfile, old_written); +} + + +/* + * process a given definition string, for initialization + * If STR is just an identifier, define it with value 1. + * If STR has anything after the identifier, then it should + * be identifier=definition. + */ + +static void +make_definition (pfile, str) + cpp_reader *pfile; + U_CHAR *str; +{ + U_CHAR *buf, *p; + + buf = str; + p = str; + if (!is_idstart[*p]) + { + cpp_error (pfile, "malformed option `-D %s'", str); + return; + } + while (is_idchar[*++p]) + ; + if (*p == 0) + { + buf = (U_CHAR *) alloca (p - buf + 4); + strcpy ((char *)buf, str); + strcat ((char *)buf, " 1"); + } + else if (*p != '=') + { + cpp_error (pfile, "malformed option `-D %s'", str); + return; + } + else + { + U_CHAR *q; + /* Copy the entire option so we can modify it. */ + buf = (U_CHAR *) alloca (2 * strlen (str) + 1); + strncpy (buf, str, p - str); + /* Change the = to a space. */ + buf[p - str] = ' '; + /* Scan for any backslash-newline and remove it. */ + p++; + q = &buf[p - str]; + while (*p) + { + if (*p == '\\' && p[1] == '\n') + p += 2; + else + *q++ = *p++; + } + *q = 0; + } + + do_define (pfile, NULL, buf, buf + strlen (buf)); +} + +/* Process the string STR as if it appeared as the body of a #assert. + OPTION is the option name for which STR was the argument. */ + +static void +make_assertion (pfile, option, str) + cpp_reader *pfile; + char *option; + U_CHAR *str; +{ + cpp_buffer *ip; + struct directive *kt; + U_CHAR *buf, *p, *q; + + /* Copy the entire option so we can modify it. */ + buf = (U_CHAR *) alloca (strlen (str) + 1); + strcpy ((char *) buf, str); + /* Scan for any backslash-newline and remove it. */ + p = q = buf; + while (*p) { +#if 0 + if (*p == '\\' && p[1] == '\n') + p += 2; + else +#endif + *q++ = *p++; + } + *q = 0; + + p = buf; + if (!is_idstart[*p]) { + cpp_error (pfile, "malformed option `%s %s'", option, str); + return; + } + while (is_idchar[*++p]) + ; + while (*p == ' ' || *p == '\t') p++; + if (! (*p == 0 || *p == '(')) { + cpp_error (pfile, "malformed option `%s %s'", option, str); + return; + } + + ip = cpp_push_buffer (pfile, buf, strlen (buf)); + do_assert (pfile, NULL, NULL, NULL); + cpp_pop_buffer (pfile); +} + +/* Append a chain of `struct file_name_list's + to the end of the main include chain. + FIRST is the beginning of the chain to append, and LAST is the end. */ + +static void +append_include_chain (pfile, first, last) + cpp_reader *pfile; + struct file_name_list *first, *last; +{ + struct cpp_options *opts = CPP_OPTIONS (pfile); + struct file_name_list *dir; + + if (!first || !last) + return; + + if (opts->include == 0) + opts->include = first; + else + opts->last_include->next = first; + + if (opts->first_bracket_include == 0) + opts->first_bracket_include = first; + + for (dir = first; ; dir = dir->next) { + int len = strlen (dir->fname) + INCLUDE_LEN_FUDGE; + if (len > pfile->max_include_len) + pfile->max_include_len = len; + if (dir == last) + break; + } + + last->next = NULL; + opts->last_include = last; +} + +/* Add output to `deps_buffer' for the -M switch. + STRING points to the text to be output. + SPACER is ':' for targets, ' ' for dependencies, zero for text + to be inserted literally. */ + +static void +deps_output (pfile, string, spacer) + cpp_reader *pfile; + char *string; + int spacer; +{ + int size = strlen (string); + + if (size == 0) + return; + +#ifndef MAX_OUTPUT_COLUMNS +#define MAX_OUTPUT_COLUMNS 72 +#endif + if (spacer + && pfile->deps_column > 0 + && (pfile->deps_column + size) > MAX_OUTPUT_COLUMNS) + { + deps_output (pfile, " \\\n ", 0); + pfile->deps_column = 0; + } + + if (pfile->deps_size + size + 8 > pfile->deps_allocated_size) + { + pfile->deps_allocated_size = (pfile->deps_size + size + 50) * 2; + pfile->deps_buffer = (char *) xrealloc (pfile->deps_buffer, + pfile->deps_allocated_size); + } + if (spacer == ' ' && pfile->deps_column > 0) + pfile->deps_buffer[pfile->deps_size++] = ' '; + bcopy (string, &pfile->deps_buffer[pfile->deps_size], size); + pfile->deps_size += size; + pfile->deps_column += size; + if (spacer == ':') + pfile->deps_buffer[pfile->deps_size++] = ':'; + pfile->deps_buffer[pfile->deps_size] = 0; +} + +/* Given a colon-separated list of file names PATH, + add all the names to the search path for include files. */ + +static void +path_include (pfile, path) + cpp_reader *pfile; + char *path; +{ + char *p; + + p = path; + + if (*p) + while (1) { + char *q = p; + char *name; + struct file_name_list *dirtmp; + + /* Find the end of this name. */ + while (*q != 0 && *q != PATH_SEPARATOR) q++; + if (p == q) { + /* An empty name in the path stands for the current directory. */ + name = (char *) xmalloc (2); + name[0] = '.'; + name[1] = 0; + } else { + /* Otherwise use the directory that is named. */ + name = (char *) xmalloc (q - p + 1); + bcopy (p, name, q - p); + name[q - p] = 0; + } + + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; /* New one goes on the end */ + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 0; + dirtmp->fname = name; + dirtmp->got_name_map = 0; + append_include_chain (pfile, dirtmp, dirtmp); + + /* Advance past this name. */ + p = q; + if (*p == 0) + break; + /* Skip the colon. */ + p++; + } +} + +void +init_parse_options (opts) + struct cpp_options *opts; +{ + bzero (opts, sizeof *opts); + opts->in_fname = NULL; + opts->out_fname = NULL; + + /* Initialize is_idchar to allow $. */ + opts->dollars_in_ident = 1; + initialize_char_syntax (opts); + opts->dollars_in_ident = DOLLARS_IN_IDENTIFIERS > 0; + + opts->no_line_commands = 0; + opts->no_trigraphs = 1; + opts->put_out_comments = 0; + opts->print_include_names = 0; + opts->dump_macros = dump_none; + opts->no_output = 0; + opts->cplusplus = 0; + opts->cplusplus_comments = 0; + + opts->verbose = 0; + opts->objc = 0; + opts->lang_asm = 0; + opts->for_lint = 0; + opts->chill = 0; + opts->pedantic_errors = 0; + opts->inhibit_warnings = 0; + opts->warn_comments = 0; + opts->warn_import = 1; + opts->warnings_are_errors = 0; +} + +enum cpp_token +null_underflow (pfile) + cpp_reader *pfile; +{ + return CPP_EOF; +} + +int +null_cleanup (pbuf, pfile) + cpp_buffer *pbuf; + cpp_reader *pfile; +{ + return 0; +} + +int +macro_cleanup (pbuf, pfile) + cpp_buffer *pbuf; + cpp_reader *pfile; +{ + HASHNODE *macro = (HASHNODE*)pbuf->data; + if (macro->type == T_DISABLED) + macro->type = T_MACRO; + if (macro->type != T_MACRO || pbuf->buf != macro->value.defn->expansion) + free (pbuf->buf); + return 0; +} + +int +file_cleanup (pbuf, pfile) + cpp_buffer *pbuf; + cpp_reader *pfile; +{ + return 0; +} + +static void +newline_fix (pfile) + cpp_reader *pfile; +{ +#if 1 + NEWLINE_FIX; +#else + register U_CHAR *p = bp; + + /* First count the backslash-newline pairs here. */ + + while (p[0] == '\\' && p[1] == '\n') + p += 2; + + /* What follows the backslash-newlines is not embarrassing. */ + + if (*p != '/' && *p != '*') + return; + + /* Copy all potentially embarrassing characters + that follow the backslash-newline pairs + down to where the pairs originally started. */ + + while (*p == '*' || *p == '/') + *bp++ = *p++; + + /* Now write the same number of pairs after the embarrassing chars. */ + while (bp < p) { + *bp++ = '\\'; + *bp++ = '\n'; + } +#endif +} + +/* Assuming we have read '/'. + If this is the start of a comment (followed by '*' or '/'), + skip to the end of the comment, and return ' '. + Return EOF if we reached the end of file before the end of the comment. + If not the start of a comment, return '/'. */ + +static int +skip_comment (pfile, linep) + cpp_reader *pfile; + long *linep; +{ + int c; + while (PEEKC() == '\\' && PEEKN(1) == '\n') + { + if (linep) + (*linep)++; + FORWARD(2); + } + if (PEEKC() == '*') + { + FORWARD(1); + for (;;) + { + int prev_c = c; + c = GETC (); + if (c == EOF) + return EOF; + while (c == '\\' && PEEKC() == '\n') + { + if (linep) + (*linep)++; + FORWARD(1), c = GETC(); + } + if (prev_c == '*' && c == '/') + return ' '; + if (c == '\n' && linep) + (*linep)++; + } + } + else if (PEEKC() == '/' && CPP_OPTIONS (pfile)->cplusplus_comments) + { + FORWARD(1); + for (;;) + { + c = GETC (); + if (c == EOF) + return ' '; /* Allow // to be terminated by EOF. */ + while (c == '\\' && PEEKC() == '\n') + { + FORWARD(1); + c = GETC(); + if (linep) + (*linep)++; + } + if (c == '\n') + { + /* Don't consider final '\n' to be part of comment. */ + FORWARD(-1); + return ' '; + } + } + } + else + return '/'; +} + +/* Skip whitespace \-newline and comments. Does not macro-expand. */ +void +cpp_skip_hspace (pfile) + cpp_reader *pfile; +{ + while (1) + { + int c = PEEKC(); + if (c == EOF) + return; /* FIXME */ + if (is_hor_space[c]) + { + if ((c == '\f' || c == '\v') && CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "%s in preprocessing directive", + c == '\f' ? "formfeed" : "vertical tab"); + FORWARD(1); + } + else if (c == '/') + { + FORWARD (1); + c = skip_comment (pfile, NULL); + if (c == '/') + FORWARD(-1); + if (c == EOF || c == '/') + return; + } + else if (c == '\\' && PEEKN(1) == '\n') { + FORWARD(2); + } + else return; + } +} + +/* Read the rest of the current line. + The line is appended to PFILE's output buffer. */ + +void +copy_rest_of_line (pfile) + cpp_reader *pfile; +{ + struct cpp_options *opts = CPP_OPTIONS (pfile); + for (;;) + { + int c = GETC(); + int nextc; + switch (c) + { + case EOF: + goto end_directive; + case '\\': + if (PEEKC() == '\n') + { + FORWARD (1); + continue; + } + case '\'': + case '\"': + goto scan_directive_token; + break; + case '/': + nextc = PEEKC(); + if (nextc == '*' || (opts->cplusplus_comments && nextc == '*')) + goto scan_directive_token; + break; + case '\f': + case '\v': + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "%s in preprocessing directive", + c == '\f' ? "formfeed" : "vertical tab"); + break; + + case '\n': + FORWARD(-1); + goto end_directive; + scan_directive_token: + FORWARD(-1); + cpp_get_token (pfile); + continue; + } + CPP_PUTC (pfile, c); + } + end_directive: ; + CPP_NUL_TERMINATE (pfile); +} + +void +skip_rest_of_line (pfile) + cpp_reader *pfile; +{ + long old = CPP_WRITTEN (pfile); + copy_rest_of_line (pfile); + CPP_SET_WRITTEN (pfile, old); +} + +/* Handle a possible # directive. + '#' has already been read. */ + +int +handle_directive (pfile) + cpp_reader *pfile; +{ int c; + register struct directive *kt; + int ident_length; + long after_ident; + U_CHAR *ident, *line_end; + long old_written = CPP_WRITTEN (pfile); + + cpp_skip_hspace (pfile); + + c = PEEKC (); + if (c >= '0' && c <= '9') + { + /* Handle # followed by a line number. */ + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "`#' followed by integer"); + do_line (pfile, NULL); + goto done_a_directive; + } + + /* Now find the directive name. */ + CPP_PUTC (pfile, '#'); + parse_name (pfile, GETC()); + ident = pfile->token_buffer + old_written + 1; + ident_length = CPP_PWRITTEN (pfile) - ident; + if (ident_length == 0 && PEEKC() == '\n') + { + /* A line of just `#' becomes blank. */ + goto done_a_directive; + } + +#if 0 + if (ident_length == 0 || !is_idstart[*ident]) { + U_CHAR *p = ident; + while (is_idchar[*p]) { + if (*p < '0' || *p > '9') + break; + p++; + } + /* Avoid error for `###' and similar cases unless -pedantic. */ + if (p == ident) { + while (*p == '#' || is_hor_space[*p]) p++; + if (*p == '\n') { + if (pedantic && !lang_asm) + cpp_warning (pfile, "invalid preprocessor directive"); + return 0; + } + } + + if (!lang_asm) + cpp_error (pfile, "invalid preprocessor directive name"); + + return 0; + } +#endif + /* + * Decode the keyword and call the appropriate expansion + * routine, after moving the input pointer up to the next line. + */ + for (kt = directive_table; ; kt++) { + if (kt->length <= 0) + goto not_a_directive; + if (kt->length == ident_length && !strncmp (kt->name, ident, ident_length)) + break; + } + + if (! kt->command_reads_line) + { + /* Nonzero means do not delete comments within the directive. + #define needs this when -traditional. */ + int comments = CPP_TRADITIONAL (pfile) && kt->traditional_comments; + int save_put_out_comments = CPP_OPTIONS (pfile)->put_out_comments; + CPP_OPTIONS (pfile)->put_out_comments = comments; + after_ident = CPP_WRITTEN (pfile); + copy_rest_of_line (pfile); + CPP_OPTIONS (pfile)->put_out_comments = save_put_out_comments; + } + + /* For #pragma and #define, we may want to pass through the directive. + Other directives may create output, but we don't want the directive + itself out, so we pop it now. For example #include may write a #line + command (see comment in do_include), and conditionals may emit + #failed ... #endfailed stuff. But note that popping the buffer + means the parameters to kt->func may point after pfile->limit + so these parameters are invalid as soon as something gets appended + to the token_buffer. */ + + line_end = CPP_PWRITTEN (pfile); + if (!kt->pass_thru && kt->type != T_DEFINE) + CPP_SET_WRITTEN (pfile, old_written); + + (*kt->func) (pfile, kt, pfile->token_buffer + after_ident, line_end); + if (kt->pass_thru + || (kt->type == T_DEFINE + && CPP_OPTIONS (pfile)->dump_macros == dump_definitions)) + { + /* Just leave the entire #define in the output stack. */ + } + else if (kt->type == T_DEFINE + && CPP_OPTIONS (pfile)->dump_macros == dump_names) + { + U_CHAR *p = pfile->token_buffer + old_written + 7; /* Skip "#define". */ + SKIP_WHITE_SPACE (p); + while (is_idchar[*p]) p++; + pfile->limit = p; + CPP_PUTC (pfile, '\n'); + } + else if (kt->type == T_DEFINE) + CPP_SET_WRITTEN (pfile, old_written); + done_a_directive: + return 1; + + not_a_directive: + return 0; +} + +/* Pass a directive through to the output file. + BUF points to the contents of the directive, as a contiguous string. + LIMIT points to the first character past the end of the directive. + KEYWORD is the keyword-table entry for the directive. */ + +static void +pass_thru_directive (buf, limit, pfile, keyword) + U_CHAR *buf, *limit; + cpp_reader *pfile; + struct directive *keyword; +{ + register unsigned keyword_length = keyword->length; + + CPP_RESERVE (pfile, 1 + keyword_length + (limit - buf)); + CPP_PUTC_Q (pfile, '#'); + CPP_PUTS_Q (pfile, keyword->name, keyword_length); + if (limit != buf && buf[0] != ' ') + CPP_PUTC_Q (pfile, ' '); + CPP_PUTS_Q (pfile, buf, limit - buf); +#if 0 + CPP_PUTS_Q (pfile, '\n'); + /* Count the line we have just made in the output, + to get in sync properly. */ + pfile->lineno++; +#endif +} + +/* The arglist structure is built by do_define to tell + collect_definition where the argument names begin. That + is, for a define like "#define f(x,y,z) foo+x-bar*y", the arglist + would contain pointers to the strings x, y, and z. + Collect_definition would then build a DEFINITION node, + with reflist nodes pointing to the places x, y, and z had + appeared. So the arglist is just convenience data passed + between these two routines. It is not kept around after + the current #define has been processed and entered into the + hash table. */ + +struct arglist { + struct arglist *next; + U_CHAR *name; + int length; + int argno; + char rest_args; +}; + +/* Read a replacement list for a macro with parameters. + Build the DEFINITION structure. + Reads characters of text starting at BUF until END. + ARGLIST specifies the formal parameters to look for + in the text of the definition; NARGS is the number of args + in that list, or -1 for a macro name that wants no argument list. + MACRONAME is the macro name itself (so we can avoid recursive expansion) + and NAMELEN is its length in characters. + +Note that comments and backslash-newlines have already been deleted +from the argument. */ + +static DEFINITION * +collect_expansion (pfile, buf, end, nargs, arglist) + cpp_reader *pfile; + U_CHAR *buf, *end; + int nargs; + struct arglist *arglist; +{ + DEFINITION *defn; + register U_CHAR *p, *limit, *lastp, *exp_p; + struct reflist *endpat = NULL; + /* Pointer to first nonspace after last ## seen. */ + U_CHAR *concat = 0; + /* Pointer to first nonspace after last single-# seen. */ + U_CHAR *stringify = 0; + int maxsize; + int expected_delimiter = '\0'; + + /* Scan thru the replacement list, ignoring comments and quoted + strings, picking up on the macro calls. It does a linear search + thru the arg list on every potential symbol. Profiling might say + that something smarter should happen. */ + + if (end < buf) + abort (); + + /* Find the beginning of the trailing whitespace. */ + /* Find end of leading whitespace. */ + limit = end; + p = buf; + while (p < limit && is_space[limit[-1]]) limit--; + while (p < limit && is_space[*p]) p++; + + /* Allocate space for the text in the macro definition. + Leading and trailing whitespace chars need 2 bytes each. + Each other input char may or may not need 1 byte, + so this is an upper bound. + The extra 2 are for invented trailing newline-marker and final null. */ + maxsize = (sizeof (DEFINITION) + + 2 * (end - limit) + 2 * (p - buf) + + (limit - p) + 3); + defn = (DEFINITION *) xcalloc (1, maxsize); + + defn->nargs = nargs; + exp_p = defn->expansion = (U_CHAR *) defn + sizeof (DEFINITION); + lastp = exp_p; + + p = buf; + + /* Add one initial space (often removed by macroexpand). */ + *exp_p++ = ' '; + + if (limit - p >= 2 && p[0] == '#' && p[1] == '#') { + cpp_error (pfile, "`##' at start of macro definition"); + p += 2; + } + + /* Process the main body of the definition. */ + while (p < limit) { + int skipped_arg = 0; + register U_CHAR c = *p++; + + *exp_p++ = c; + + if (!CPP_TRADITIONAL (pfile)) { + switch (c) { + case '\'': + case '\"': + if (expected_delimiter != '\0') { + if (c == expected_delimiter) + expected_delimiter = '\0'; + } else + expected_delimiter = c; + break; + + /* Special hack: if a \# is written in the #define + include a # in the definition. This is useless for C code + but useful for preprocessing other things. */ + + case '\\': + /* \# quotes a # even outside of strings. */ + if (p < limit && *p == '#' && !expected_delimiter) { + exp_p--; + *exp_p++ = *p++; + } else if (p < limit && expected_delimiter) { + /* In a string, backslash goes through + and makes next char ordinary. */ + *exp_p++ = *p++; + } + break; + + case '@': + *exp_p++ = c; + break; + + case '#': + /* # is ordinary inside a string. */ + if (expected_delimiter) + break; + if (p < limit && *p == '#') { + /* ##: concatenate preceding and following tokens. */ + /* Take out the first #, discard preceding whitespace. */ + exp_p--; + while (exp_p > lastp && is_hor_space[exp_p[-1]]) + --exp_p; + /* Skip the second #. */ + p++; + /* Discard following whitespace. */ + SKIP_WHITE_SPACE (p); + concat = p; + if (p == limit) + cpp_error (pfile, "`##' at end of macro definition"); + } else if (nargs >= 0) { + /* Single #: stringify following argument ref. + Don't leave the # in the expansion. */ + exp_p--; + SKIP_WHITE_SPACE (p); + if (p == limit || ! is_idstart[*p]) + cpp_error (pfile, + "`#' operator is not followed by a macro argument name"); + else + stringify = p; + } + break; + } + } else { + /* In -traditional mode, recognize arguments inside strings and + and character constants, and ignore special properties of #. + Arguments inside strings are considered "stringified", but no + extra quote marks are supplied. */ + switch (c) { + case '\'': + case '\"': + if (expected_delimiter != '\0') { + if (c == expected_delimiter) + expected_delimiter = '\0'; + } else + expected_delimiter = c; + break; + + case '\\': + /* Backslash quotes delimiters and itself, but not macro args. */ + if (expected_delimiter != 0 && p < limit + && (*p == expected_delimiter || *p == '\\')) { + *exp_p++ = *p++; + continue; + } + break; + + case '/': + if (expected_delimiter != '\0') /* No comments inside strings. */ + break; + if (*p == '*') { + /* If we find a comment that wasn't removed by handle_directive, + this must be -traditional. So replace the comment with + nothing at all. */ + exp_p--; + p += 1; + while (p < limit && !(p[-2] == '*' && p[-1] == '/')) + p++; +#if 0 + /* Mark this as a concatenation-point, as if it had been ##. */ + concat = p; +#endif + } + break; + } + } + + /* Handle the start of a symbol. */ + if (is_idchar[c] && nargs > 0) { + U_CHAR *id_beg = p - 1; + int id_len; + + --exp_p; + while (p != limit && is_idchar[*p]) p++; + id_len = p - id_beg; + + if (is_idstart[c]) { + register struct arglist *arg; + + for (arg = arglist; arg != NULL; arg = arg->next) { + struct reflist *tpat; + + if (arg->name[0] == c + && arg->length == id_len + && strncmp (arg->name, id_beg, id_len) == 0) { + if (expected_delimiter && CPP_OPTIONS (pfile)->warn_stringify) { + if (CPP_TRADITIONAL (pfile)) { + cpp_warning (pfile, "macro argument `%.*s' is stringified.", + id_len, arg->name); + } else { + cpp_warning (pfile, + "macro arg `%.*s' would be stringified with -traditional.", + id_len, arg->name); + } + } + /* If ANSI, don't actually substitute inside a string. */ + if (!CPP_TRADITIONAL (pfile) && expected_delimiter) + break; + /* make a pat node for this arg and append it to the end of + the pat list */ + tpat = (struct reflist *) xmalloc (sizeof (struct reflist)); + tpat->next = NULL; + tpat->raw_before = concat == id_beg; + tpat->raw_after = 0; + tpat->rest_args = arg->rest_args; + tpat->stringify = (CPP_TRADITIONAL (pfile) + ? expected_delimiter != '\0' + : stringify == id_beg); + + if (endpat == NULL) + defn->pattern = tpat; + else + endpat->next = tpat; + endpat = tpat; + + tpat->argno = arg->argno; + tpat->nchars = exp_p - lastp; + { + register U_CHAR *p1 = p; + SKIP_WHITE_SPACE (p1); + if (p1 + 2 <= limit && p1[0] == '#' && p1[1] == '#') + tpat->raw_after = 1; + } + lastp = exp_p; /* place to start copying from next time */ + skipped_arg = 1; + break; + } + } + } + + /* If this was not a macro arg, copy it into the expansion. */ + if (! skipped_arg) { + register U_CHAR *lim1 = p; + p = id_beg; + while (p != lim1) + *exp_p++ = *p++; + if (stringify == id_beg) + cpp_error (pfile, + "`#' operator should be followed by a macro argument name"); + } + } + } + + if (limit < end) { + while (limit < end && is_space[*limit]) { + *exp_p++ = *limit++; + } + } else if (!CPP_TRADITIONAL (pfile) && expected_delimiter == 0) { + /* There is no trailing whitespace, so invent some in ANSI mode. + But not if "inside a string" (which in ANSI mode + happens only for -D option). */ + *exp_p++ = ' '; + } + + *exp_p = '\0'; + + defn->length = exp_p - defn->expansion; + + /* Crash now if we overrun the allocated size. */ + if (defn->length + 1 > maxsize) + abort (); + +#if 0 +/* This isn't worth the time it takes. */ + /* give back excess storage */ + defn->expansion = (U_CHAR *) xrealloc (defn->expansion, defn->length + 1); +#endif + + return defn; +} + +/* + * special extension string that can be added to the last macro argument to + * allow it to absorb the "rest" of the arguments when expanded. Ex: + * #define wow(a, b...) process (b, a, b) + * { wow (1, 2, 3); } -> { process (2, 3, 1, 2, 3); } + * { wow (one, two); } -> { process (two, one, two); } + * if this "rest_arg" is used with the concat token '##' and if it is not + * supplied then the token attached to with ## will not be outputted. Ex: + * #define wow (a, b...) process (b ## , a, ## b) + * { wow (1, 2); } -> { process (2, 1, 2); } + * { wow (one); } -> { process (one); { + */ +static char rest_extension[] = "..."; +#define REST_EXTENSION_LENGTH (sizeof (rest_extension) - 1) + +/* Create a DEFINITION node from a #define directive. Arguments are + as for do_define. */ +static MACRODEF +create_definition (buf, limit, pfile, predefinition) + U_CHAR *buf, *limit; + cpp_reader *pfile; + int predefinition; +{ + U_CHAR *bp; /* temp ptr into input buffer */ + U_CHAR *symname; /* remember where symbol name starts */ + int sym_length; /* and how long it is */ + int rest_args = 0; + long line, col; + char *file = CPP_BUFFER (pfile) ? CPP_BUFFER (pfile)->nominal_fname : ""; + DEFINITION *defn; + int arglengths = 0; /* Accumulate lengths of arg names + plus number of args. */ + MACRODEF mdef; + cpp_buf_line_and_col (CPP_BUFFER (pfile), &line, &col); + + bp = buf; + + while (is_hor_space[*bp]) + bp++; + + symname = bp; /* remember where it starts */ + + sym_length = check_macro_name (pfile, bp, "macro"); + bp += sym_length; + + /* Lossage will occur if identifiers or control keywords are broken + across lines using backslash. This is not the right place to take + care of that. */ + + if (*bp == '(') { + struct arglist *arg_ptrs = NULL; + int argno = 0; + + bp++; /* skip '(' */ + SKIP_WHITE_SPACE (bp); + + /* Loop over macro argument names. */ + while (*bp != ')') { + struct arglist *temp; + + temp = (struct arglist *) alloca (sizeof (struct arglist)); + temp->name = bp; + temp->next = arg_ptrs; + temp->argno = argno++; + temp->rest_args = 0; + arg_ptrs = temp; + + if (rest_args) + cpp_pedwarn (pfile, "another parameter follows `%s'", rest_extension); + + if (!is_idstart[*bp]) + cpp_pedwarn (pfile, "invalid character in macro parameter name"); + + /* Find the end of the arg name. */ + while (is_idchar[*bp]) { + bp++; + /* do we have a "special" rest-args extension here? */ + if (limit - bp > REST_EXTENSION_LENGTH && + strncmp (rest_extension, bp, REST_EXTENSION_LENGTH) == 0) { + rest_args = 1; + temp->rest_args = 1; + break; + } + } + temp->length = bp - temp->name; + if (rest_args == 1) + bp += REST_EXTENSION_LENGTH; + arglengths += temp->length + 2; + SKIP_WHITE_SPACE (bp); + if (temp->length == 0 || (*bp != ',' && *bp != ')')) { + cpp_error (pfile, "badly punctuated parameter list in `#define'"); + goto nope; + } + if (*bp == ',') { + bp++; + SKIP_WHITE_SPACE (bp); + } + if (bp >= limit) { + cpp_error (pfile, "unterminated parameter list in `#define'"); + goto nope; + } + { + struct arglist *otemp; + + for (otemp = temp->next; otemp != NULL; otemp = otemp->next) + if (temp->length == otemp->length && + strncmp (temp->name, otemp->name, temp->length) == 0) { + U_CHAR *name; + + name = (U_CHAR *) alloca (temp->length + 1); + (void) strncpy (name, temp->name, temp->length); + name[temp->length] = '\0'; + cpp_error (pfile, + "duplicate argument name `%s' in `#define'", name); + goto nope; + } + } + } + + ++bp; /* skip paren */ + /* Skip exactly one space or tab if any. */ + if (bp < limit && (*bp == ' ' || *bp == '\t')) ++bp; + /* now everything from bp before limit is the definition. */ + defn = collect_expansion (pfile, bp, limit, argno, arg_ptrs); + defn->rest_args = rest_args; + + /* Now set defn->args.argnames to the result of concatenating + the argument names in reverse order + with comma-space between them. */ + defn->args.argnames = (U_CHAR *) xmalloc (arglengths + 1); + { + struct arglist *temp; + int i = 0; + for (temp = arg_ptrs; temp; temp = temp->next) { + bcopy (temp->name, &defn->args.argnames[i], temp->length); + i += temp->length; + if (temp->next != 0) { + defn->args.argnames[i++] = ','; + defn->args.argnames[i++] = ' '; + } + } + defn->args.argnames[i] = 0; + } + } else { + /* simple expansion or empty definition; gobble it */ + if (is_hor_space[*bp]) + ++bp; /* skip exactly one blank/tab char */ + /* now everything from bp before limit is the definition. */ + defn = collect_expansion (pfile, bp, limit, -1, NULL_PTR); + defn->args.argnames = (U_CHAR *) ""; + } + + defn->line = line; + defn->file = file; + + /* OP is null if this is a predefinition */ + defn->predefined = predefinition; + mdef.defn = defn; + mdef.symnam = symname; + mdef.symlen = sym_length; + + return mdef; + + nope: + mdef.defn = 0; + return mdef; +} + +/* Check a purported macro name SYMNAME, and yield its length. + USAGE is the kind of name this is intended for. */ + +static int +check_macro_name (pfile, symname, usage) + cpp_reader *pfile; + U_CHAR *symname; + char *usage; +{ + U_CHAR *p; + int sym_length; + + for (p = symname; is_idchar[*p]; p++) + ; + sym_length = p - symname; + if (sym_length == 0) + cpp_error (pfile, "invalid %s name", usage); + else if (!is_idstart[*symname]) { + U_CHAR *msg; /* what pain... */ + msg = (U_CHAR *) alloca (sym_length + 1); + bcopy (symname, msg, sym_length); + msg[sym_length] = 0; + cpp_error (pfile, "invalid %s name `%s'", usage, msg); + } else { + if (! strncmp (symname, "defined", 7) && sym_length == 7) + cpp_error (pfile, "invalid %s name `defined'", usage); + } + return sym_length; +} + +/* + * return zero if two DEFINITIONs are isomorphic + */ +static int +compare_defs (d1, d2) + DEFINITION *d1, *d2; +{ + register struct reflist *a1, *a2; + register U_CHAR *p1 = d1->expansion; + register U_CHAR *p2 = d2->expansion; + int first = 1; + + if (d1->nargs != d2->nargs) + return 1; + if (strcmp ((char *)d1->args.argnames, (char *)d2->args.argnames)) + return 1; + for (a1 = d1->pattern, a2 = d2->pattern; a1 && a2; + a1 = a1->next, a2 = a2->next) { + if (!((a1->nchars == a2->nchars && ! strncmp (p1, p2, a1->nchars)) + || ! comp_def_part (first, p1, a1->nchars, p2, a2->nchars, 0)) + || a1->argno != a2->argno + || a1->stringify != a2->stringify + || a1->raw_before != a2->raw_before + || a1->raw_after != a2->raw_after) + return 1; + first = 0; + p1 += a1->nchars; + p2 += a2->nchars; + } + if (a1 != a2) + return 1; + if (comp_def_part (first, p1, d1->length - (p1 - d1->expansion), + p2, d2->length - (p2 - d2->expansion), 1)) + return 1; + return 0; +} + +/* Return 1 if two parts of two macro definitions are effectively different. + One of the parts starts at BEG1 and has LEN1 chars; + the other has LEN2 chars at BEG2. + Any sequence of whitespace matches any other sequence of whitespace. + FIRST means these parts are the first of a macro definition; + so ignore leading whitespace entirely. + LAST means these parts are the last of a macro definition; + so ignore trailing whitespace entirely. */ + +static int +comp_def_part (first, beg1, len1, beg2, len2, last) + int first; + U_CHAR *beg1, *beg2; + int len1, len2; + int last; +{ + register U_CHAR *end1 = beg1 + len1; + register U_CHAR *end2 = beg2 + len2; + if (first) { + while (beg1 != end1 && is_space[*beg1]) beg1++; + while (beg2 != end2 && is_space[*beg2]) beg2++; + } + if (last) { + while (beg1 != end1 && is_space[end1[-1]]) end1--; + while (beg2 != end2 && is_space[end2[-1]]) end2--; + } + while (beg1 != end1 && beg2 != end2) { + if (is_space[*beg1] && is_space[*beg2]) { + while (beg1 != end1 && is_space[*beg1]) beg1++; + while (beg2 != end2 && is_space[*beg2]) beg2++; + } else if (*beg1 == *beg2) { + beg1++; beg2++; + } else break; + } + return (beg1 != end1) || (beg2 != end2); +} + +/* Process a #define command. +BUF points to the contents of the #define command, as a contiguous string. +LIMIT points to the first character past the end of the definition. +KEYWORD is the keyword-table entry for #define, +or NULL for a "predefined" macro. */ + +static int +do_define (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int hashcode; + MACRODEF mdef; + HASHNODE *hp; + +#if 0 + /* If this is a precompiler run (with -pcp) pass thru #define commands. */ + if (pcp_outfile && keyword) + pass_thru_directive (buf, limit, pfile, keyword); +#endif + + mdef = create_definition (buf, limit, pfile, keyword == NULL); + if (mdef.defn == 0) + goto nope; + + hashcode = hashf (mdef.symnam, mdef.symlen, HASHSIZE); + + if ((hp = cpp_lookup (pfile, mdef.symnam, mdef.symlen, hashcode)) != NULL) + { + int ok = 0; + /* Redefining a precompiled key is ok. */ + if (hp->type == T_PCSTRING) + ok = 1; + /* Redefining a macro is ok if the definitions are the same. */ + else if (hp->type == T_MACRO) + ok = ! compare_defs (mdef.defn, hp->value.defn); + /* Redefining a constant is ok with -D. */ + else if (hp->type == T_CONST) + ok = ! CPP_OPTIONS (pfile)->done_initializing; + /* Print the warning if it's not ok. */ + if (!ok) + { + U_CHAR *msg; /* what pain... */ + + /* If we are passing through #define and #undef directives, do + that for this re-definition now. */ + if (CPP_OPTIONS (pfile)->debug_output && keyword) + pass_thru_directive (buf, limit, pfile, keyword); + + msg = (U_CHAR *) alloca (mdef.symlen + 22); + *msg = '`'; + bcopy (mdef.symnam, msg + 1, mdef.symlen); + strcpy ((char *) (msg + mdef.symlen + 1), "' redefined"); + cpp_pedwarn (pfile, msg); + if (hp->type == T_MACRO) + cpp_pedwarn_with_file_and_line (pfile, hp->value.defn->file, hp->value.defn->line, + "this is the location of the previous definition"); + } + /* Replace the old definition. */ + hp->type = T_MACRO; + hp->value.defn = mdef.defn; + } + else + { + /* If we are passing through #define and #undef directives, do + that for this new definition now. */ + if (CPP_OPTIONS (pfile)->debug_output && keyword) + pass_thru_directive (buf, limit, pfile, keyword); + install (mdef.symnam, mdef.symlen, T_MACRO, 0, + (char *) mdef.defn, hashcode); + } + + return 0; + +nope: + + return 1; +} + +/* This structure represents one parsed argument in a macro call. + `raw' points to the argument text as written (`raw_length' is its length). + `expanded' points to the argument's macro-expansion + (its length is `expand_length'). + `stringified_length' is the length the argument would have + if stringified. + `use_count' is the number of times this macro arg is substituted + into the macro. If the actual use count exceeds 10, + the value stored is 10. */ + +/* raw and expanded are relative to ARG_BASE */ +#define ARG_BASE ((pfile)->token_buffer) + +struct argdata { + /* Strings relative to pfile->token_buffer */ + long raw, expanded, stringified; + int raw_length, expand_length; + int stringified_length; + char newlines; + char comments; + char use_count; +}; + + +cpp_buffer* +cpp_push_buffer (pfile, buffer, length) + cpp_reader *pfile; + U_CHAR *buffer; + long length; +{ +#ifdef STATIC_BUFFERS + register cpp_buffer *buf; + if (buf == pfile->buffer_stack) + fatal ("macro or `#include' recursion too deep"); + buf = CPP_BUFFER (pfile) - 1; + bzero ((char *) buf, sizeof (cpp_buffer)); + CPP_BUFFER (pfile) = buf; +#else + register cpp_buffer *buf = (cpp_buffer*) xmalloc (sizeof(cpp_buffer)); + bzero ((char *) buf, sizeof (cpp_buffer)); + CPP_PREV_BUFFER (buf) = CPP_BUFFER (pfile); + CPP_BUFFER (pfile) = buf; +#endif + buf->if_stack = pfile->if_stack; + buf->cleanup = null_cleanup; + buf->underflow = null_underflow; + buf->buf = buf->cur = buffer; + buf->alimit = buf->rlimit = buffer + length; + + return buf; +} + +cpp_buffer* +cpp_pop_buffer (pfile) + cpp_reader *pfile; +{ + cpp_buffer *buf = CPP_BUFFER (pfile); +#ifdef STATIC_BUFFERS + (*buf->cleanup) (buf, pfile); + return ++CPP_BUFFER (pfile); +#else + cpp_buffer *next_buf = CPP_PREV_BUFFER (buf); + (*buf->cleanup) (buf, pfile); + CPP_BUFFER (pfile) = next_buf; + free (buf); + return next_buf; +#endif +} + +/* Scan until CPP_BUFFER (PFILE) is exhausted into PFILE->token_buffer. + Pop the buffer when done. */ + +void +cpp_scan_buffer (pfile) + cpp_reader *pfile; +{ + cpp_buffer *buffer = CPP_BUFFER (pfile); + for (;;) + { + enum cpp_token token = cpp_get_token (pfile); + if (token == CPP_EOF) /* Should not happen ... */ + break; + if (token == CPP_POP && CPP_BUFFER (pfile) == buffer) + { + cpp_pop_buffer (pfile); + break; + } + } +} + +/* + * Rescan a string into pfile's buffer. + * Place the result in pfile->token_buffer. + * + * The input is copied before it is scanned, so it is safe to pass + * it something from the token_buffer that will get overwritten + * (because it follows CPP_WRITTEN). This is used by do_include. + * + * OUTPUT_MARKS nonzero means keep Newline markers found in the input + * and insert such markers when appropriate. See `rescan' for details. + * OUTPUT_MARKS is 1 for macroexpanding a macro argument separately + * before substitution; it is 0 for other uses. + */ + +void +cpp_expand_to_buffer (pfile, buf, length) + cpp_reader *pfile; + U_CHAR *buf; + int length; +{ + register cpp_buffer *ip; + cpp_buffer obuf; + U_CHAR *limit = buf + length; + U_CHAR *buf1; +#if 0 + int odepth = indepth; +#endif + + if (length < 0) + abort (); + + /* Set up the input on the input stack. */ + + buf1 = (U_CHAR *) alloca (length + 1); + { + register U_CHAR *p1 = buf; + register U_CHAR *p2 = buf1; + + while (p1 != limit) + *p2++ = *p1++; + } + buf1[length] = 0; + + ip = cpp_push_buffer (pfile, buf1, length); +#if 0 + ip->lineno = obuf.lineno = 1; +#endif + + /* Scan the input, create the output. */ + cpp_scan_buffer (pfile); + +#if 0 + if (indepth != odepth) + abort (); +#endif + + CPP_NUL_TERMINATE (pfile); +} + + +static void +adjust_position (buf, limit, linep, colp) + U_CHAR *buf; + U_CHAR *limit; + long *linep; + long *colp; +{ + while (buf < limit) + { + U_CHAR ch = *buf++; + if (ch == '\n') + (*linep)++, (*colp) = 1; + else + (*colp)++; + } +} + +/* Move line_base forward, updating lineno and colno. */ + +static void +update_position (pbuf) + register cpp_buffer *pbuf; +{ + unsigned char *old_pos = pbuf->buf + pbuf->line_base; + unsigned char *new_pos = pbuf->cur; + register struct parse_marker *mark; + for (mark = pbuf->marks; mark != NULL; mark = mark->next) + { + if (pbuf->buf + mark->position < new_pos) + new_pos = pbuf->buf + mark->position; + } + pbuf->line_base += new_pos - old_pos; + adjust_position (old_pos, new_pos, &pbuf->lineno, &pbuf->colno); +} + +void +cpp_buf_line_and_col (pbuf, linep, colp) + register cpp_buffer *pbuf; + long *linep, *colp; +{ + long dummy; + if (colp == NULL) + colp = &dummy; + if (pbuf) + { + *linep = pbuf->lineno; + *colp = pbuf->colno; + adjust_position (pbuf->buf + pbuf->line_base, pbuf->cur, linep, colp); + } + else + { + *linep = 0; + *colp = 0; + } +} + +/* Return the cpp_buffer that corresponds to a file (not a macro). */ + +cpp_buffer* +cpp_file_buffer (pfile) + cpp_reader *pfile; +{ + cpp_buffer *ip; + + for (ip = CPP_BUFFER (pfile); ip != NULL; ip = CPP_PREV_BUFFER (ip)) + if (ip->fname != NULL) + return ip; + return NULL; +} + +static long +count_newlines (buf, limit) + register U_CHAR *buf; + register U_CHAR *limit; +{ + register long count = 0; + while (buf < limit) + { + U_CHAR ch = *buf++; + if (ch == '\n') + count++; + } + return count; +} + +/* + * write out a #line command, for instance, after an #include file. + * If CONDITIONAL is nonzero, we can omit the #line if it would + * appear to be a no-op, and we can output a few newlines instead + * if we want to increase the line number by a small amount. + * FILE_CHANGE says whether we are entering a file, leaving, or neither. + */ + +static void +output_line_command (pfile, conditional, file_change) + cpp_reader *pfile; + int conditional; + enum file_change_code file_change; +{ + int len; + char *line_cmd_buf, *line_end; + long line, col; + cpp_buffer *ip = CPP_BUFFER (pfile); + + if (CPP_OPTIONS (pfile)->no_line_commands + || ip->fname == NULL || CPP_OPTIONS (pfile)->no_output) { + return; + } + + update_position (ip); + line = CPP_BUFFER (pfile)->lineno; + col = CPP_BUFFER (pfile)->colno; + adjust_position (CPP_LINE_BASE (ip), ip->cur, &line, &col); + + if (conditional) { + if (line == pfile->lineno) + return; + + /* If the inherited line number is a little too small, + output some newlines instead of a #line command. */ + if (line > pfile->lineno && line < pfile->lineno + 8) { + CPP_RESERVE (pfile, 20); + while (line > pfile->lineno) { + CPP_PUTC_Q (pfile, '\n'); + pfile->lineno++; + } + return; + } + } + +#if 0 + /* Don't output a line number of 0 if we can help it. */ + if (ip->lineno == 0 && ip->bufp - ip->buf < ip->length + && *ip->bufp == '\n') { + ip->lineno++; + ip->bufp++; + } +#endif + + CPP_RESERVE (pfile, 4 * strlen (ip->nominal_fname) + 50); + { +#ifdef OUTPUT_LINE_COMMANDS + static char sharp_line[] = "#line "; +#else + static char sharp_line[] = "# "; +#endif + CPP_PUTS_Q (pfile, sharp_line, sizeof(sharp_line)-1); + } + + sprintf (CPP_PWRITTEN (pfile), "%d ", line); + CPP_ADJUST_WRITTEN (pfile, strlen (CPP_PWRITTEN (pfile))); + + quote_string (pfile, ip->nominal_fname); + if (file_change != same_file) { + CPP_PUTC_Q (pfile, ' '); + CPP_PUTC_Q (pfile, file_change == enter_file ? '1' : '2'); + } + /* Tell cc1 if following text comes from a system header file. */ + if (ip->system_header_p) { + CPP_PUTC_Q (pfile, ' '); + CPP_PUTC_Q (pfile, '3'); + } +#ifndef NO_IMPLICIT_EXTERN_C + /* Tell cc1plus if following text should be treated as C. */ + if (ip->system_header_p == 2 && CPP_OPTIONS (pfile)->cplusplus) { + CPP_PUTC_Q (pfile, ' '); + CPP_PUTC_Q (pfile, '4'); + } +#endif + CPP_PUTC_Q (pfile, '\n'); + pfile->lineno = line; +} + +/* + * Parse a macro argument and store the info on it into *ARGPTR. + * REST_ARGS means to absorb the rest of the args. + * Return nonzero to indicate a syntax error. + */ + +static enum cpp_token +macarg (pfile, rest_args) + cpp_reader *pfile; + int rest_args; +{ + int paren = 0; + enum cpp_token token; + long arg_start = CPP_WRITTEN (pfile); + char save_put_out_comments = CPP_OPTIONS (pfile)->put_out_comments; + CPP_OPTIONS (pfile)->put_out_comments = 0; + + /* Try to parse as much of the argument as exists at this + input stack level. */ + pfile->no_macro_expand++; + for (;;) + { + token = cpp_get_token (pfile); + switch (token) + { + case CPP_EOF: + goto done; + case CPP_POP: + /* If we've hit end of file, it's an error (reported by caller). + Ditto if it's the end of cpp_expand_to_buffer text. + If we've hit end of macro, just continue. */ + if (! CPP_IS_MACRO_BUFFER (CPP_BUFFER (pfile))) + goto done; + break; + case CPP_LPAREN: + paren++; + break; + case CPP_RPAREN: + if (--paren < 0) + goto found; + break; + case CPP_COMMA: + /* if we've returned to lowest level and + we aren't absorbing all args */ + if (paren == 0 && rest_args == 0) + goto found; + break; + found: + /* Remove ',' or ')' from argument buffer. */ + CPP_ADJUST_WRITTEN (pfile, -1); + goto done; + default: ; + } + } + + done: + CPP_OPTIONS (pfile)->put_out_comments = save_put_out_comments; + pfile->no_macro_expand--; + + return token; +} + +/* Turn newlines to spaces in the string of length LENGTH at START, + except inside of string constants. + The string is copied into itself with its beginning staying fixed. */ + +static int +change_newlines (start, length) + U_CHAR *start; + int length; +{ + register U_CHAR *ibp; + register U_CHAR *obp; + register U_CHAR *limit; + register int c; + + ibp = start; + limit = start + length; + obp = start; + + while (ibp < limit) { + *obp++ = c = *ibp++; + switch (c) { + + case '\'': + case '\"': + /* Notice and skip strings, so that we don't delete newlines in them. */ + { + int quotec = c; + while (ibp < limit) { + *obp++ = c = *ibp++; + if (c == quotec) + break; + if (c == '\n' && quotec == '\'') + break; + } + } + break; + } + } + + return obp - start; +} + + +static struct tm * +timestamp (pfile) + cpp_reader *pfile; +{ + if (!pfile->timebuf) { + time_t t = time ((time_t *)0); + pfile->timebuf = localtime (&t); + } + return pfile->timebuf; +} + +static char *monthnames[] = {"Jan", "Feb", "Mar", "Apr", "May", "Jun", + "Jul", "Aug", "Sep", "Oct", "Nov", "Dec", + }; + +/* + * expand things like __FILE__. Place the expansion into the output + * buffer *without* rescanning. + */ + +static void +special_symbol (hp, pfile) + HASHNODE *hp; + cpp_reader *pfile; +{ + char *buf; + int i, len; + int true_indepth; + cpp_buffer *ip = NULL; + struct tm *timebuf; + + int paren = 0; /* For special `defined' keyword */ + +#if 0 + if (pcp_outfile && pcp_inside_if + && hp->type != T_SPEC_DEFINED && hp->type != T_CONST) + cpp_error (pfile, + "Predefined macro `%s' used inside `#if' during precompilation", + hp->name); +#endif + + for (ip = CPP_BUFFER (pfile); ; ip = CPP_PREV_BUFFER (ip)) + { + if (ip == NULL) + { + cpp_error (pfile, "cccp error: not in any file?!"); + return; /* the show must go on */ + } + if (ip->fname != NULL) + break; + } + + switch (hp->type) + { + case T_FILE: + case T_BASE_FILE: + { + char *string; + if (hp->type == T_BASE_FILE) + { + while (CPP_PREV_BUFFER (ip)) + ip = CPP_PREV_BUFFER (ip); + } + string = ip->nominal_fname; + + if (!string) + string = ""; + CPP_RESERVE (pfile, 3 + 4 * strlen (string)); + quote_string (pfile, string); + return; + } + + case T_INCLUDE_LEVEL: + true_indepth = 0; + for (ip = CPP_BUFFER (pfile); ip != NULL; ip = CPP_PREV_BUFFER (ip)) + if (ip->fname != NULL) + true_indepth++; + + buf = (char *) alloca (8); /* Eight bytes ought to be more than enough */ + sprintf (buf, "%d", true_indepth - 1); + break; + + case T_VERSION: + buf = (char *) alloca (3 + strlen (version_string)); + sprintf (buf, "\"%s\"", version_string); + break; + +#ifndef NO_BUILTIN_SIZE_TYPE + case T_SIZE_TYPE: + buf = SIZE_TYPE; + break; +#endif + +#ifndef NO_BUILTIN_PTRDIFF_TYPE + case T_PTRDIFF_TYPE: + buf = PTRDIFF_TYPE; + break; +#endif + + case T_WCHAR_TYPE: + buf = CPP_WCHAR_TYPE (pfile); + break; + + case T_USER_LABEL_PREFIX_TYPE: + buf = USER_LABEL_PREFIX; + break; + + case T_REGISTER_PREFIX_TYPE: + buf = REGISTER_PREFIX; + break; + + case T_CONST: + buf = (char *) alloca (4 * sizeof (int)); + sprintf (buf, "%d", hp->value.ival); +#if 0 + if (pcp_inside_if && pcp_outfile) + /* Output a precondition for this macro use */ + fprintf (pcp_outfile, "#define %s %d\n", hp->name, hp->value.ival); +#endif + break; + + case T_SPECLINE: + { + long line = CPP_BUFFER (pfile)->lineno; + long col = CPP_BUFFER (pfile)->colno; + cpp_buffer *ip = CPP_BUFFER (pfile); + adjust_position (CPP_LINE_BASE (ip), ip->cur, &line, &col); + + buf = (char *) alloca (10); + sprintf (buf, "%d", line); + } + break; + + case T_DATE: + case T_TIME: + buf = (char *) alloca (20); + timebuf = timestamp (pfile); + if (hp->type == T_DATE) + sprintf (buf, "\"%s %2d %4d\"", monthnames[timebuf->tm_mon], + timebuf->tm_mday, timebuf->tm_year + 1900); + else + sprintf (buf, "\"%02d:%02d:%02d\"", timebuf->tm_hour, timebuf->tm_min, + timebuf->tm_sec); + break; + + case T_SPEC_DEFINED: + buf = " 0 "; /* Assume symbol is not defined */ + ip = CPP_BUFFER (pfile); + SKIP_WHITE_SPACE (ip->cur); + if (*ip->cur == '(') + { + paren++; + ip->cur++; /* Skip over the paren */ + SKIP_WHITE_SPACE (ip->cur); + } + + if (!is_idstart[*ip->cur]) + goto oops; + if (hp = cpp_lookup (pfile, ip->cur, -1, -1)) + { +#if 0 + if (pcp_outfile && pcp_inside_if + && (hp->type == T_CONST + || (hp->type == T_MACRO && hp->value.defn->predefined))) + /* Output a precondition for this macro use. */ + fprintf (pcp_outfile, "#define %s\n", hp->name); +#endif + buf = " 1 "; + } +#if 0 + else + if (pcp_outfile && pcp_inside_if) + { + /* Output a precondition for this macro use */ + U_CHAR *cp = ip->bufp; + fprintf (pcp_outfile, "#undef "); + while (is_idchar[*cp]) /* Ick! */ + fputc (*cp++, pcp_outfile); + putc ('\n', pcp_outfile); + } +#endif + while (is_idchar[*ip->cur]) + ++ip->cur; + SKIP_WHITE_SPACE (ip->cur); + if (paren) + { + if (*ip->cur != ')') + goto oops; + ++ip->cur; + } + break; + + oops: + + cpp_error (pfile, "`defined' without an identifier"); + break; + + default: + cpp_error (pfile, "cccp error: invalid special hash type"); /* time for gdb */ + abort (); + } + len = strlen (buf); + CPP_RESERVE (pfile, len + 1); + CPP_PUTS_Q (pfile, buf, len); + CPP_NUL_TERMINATE_Q (pfile); + + return; +} + +/* Initialize the built-in macros. */ + +static void +initialize_builtins (pfile) + cpp_reader *pfile; +{ + install ("__LINE__", -1, T_SPECLINE, 0, 0, -1); + install ("__DATE__", -1, T_DATE, 0, 0, -1); + install ("__FILE__", -1, T_FILE, 0, 0, -1); + install ("__BASE_FILE__", -1, T_BASE_FILE, 0, 0, -1); + install ("__INCLUDE_LEVEL__", -1, T_INCLUDE_LEVEL, 0, 0, -1); + install ("__VERSION__", -1, T_VERSION, 0, 0, -1); +#ifndef NO_BUILTIN_SIZE_TYPE + install ("__SIZE_TYPE__", -1, T_SIZE_TYPE, 0, 0, -1); +#endif +#ifndef NO_BUILTIN_PTRDIFF_TYPE + install ("__PTRDIFF_TYPE__ ", -1, T_PTRDIFF_TYPE, 0, 0, -1); +#endif + install ("__WCHAR_TYPE__", -1, T_WCHAR_TYPE, 0, 0, -1); + install ("__USER_LABEL_PREFIX__", -1, T_USER_LABEL_PREFIX_TYPE, 0, 0, -1); + install ("__REGISTER_PREFIX__", -1, T_REGISTER_PREFIX_TYPE, 0, 0, -1); + install ("__TIME__", -1, T_TIME, 0, 0, -1); + if (!CPP_TRADITIONAL (pfile)) + install ("__STDC__", -1, T_CONST, STDC_VALUE, 0, -1); + if (CPP_OPTIONS (pfile)->objc) + install ("__OBJC__", -1, T_CONST, 1, 0, -1); +/* This is supplied using a -D by the compiler driver + so that it is present only when truly compiling with GNU C. */ +/* install ("__GNUC__", -1, T_CONST, 2, 0, -1); */ + + if (CPP_OPTIONS (pfile)->debug_output) + { + char directive[2048]; + register struct directive *dp = &directive_table[0]; + struct tm *timebuf = timestamp (); + cpp_buffer *pbuffer = CPP_BUFFER (pfile); + + while (CPP_PREV_BUFFER (pbuffer)) + pbuffer = CPP_PREV_BUFFER (pbuffer); + sprintf (directive, " __BASE_FILE__ \"%s\"\n", + pbuffer->nominal_fname); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); + + sprintf (directive, " __VERSION__ \"%s\"\n", version_string); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); + +#ifndef NO_BUILTIN_SIZE_TYPE + sprintf (directive, " __SIZE_TYPE__ %s\n", SIZE_TYPE); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); +#endif + +#ifndef NO_BUILTIN_PTRDIFF_TYPE + sprintf (directive, " __PTRDIFF_TYPE__ %s\n", PTRDIFF_TYPE); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); +#endif + + sprintf (directive, " __WCHAR_TYPE__ %s\n", CPP_WCHAR_TYPE (pfile)); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); + + sprintf (directive, " __DATE__ \"%s %2d %4d\"\n", + monthnames[timebuf->tm_mon], + timebuf->tm_mday, timebuf->tm_year + 1900); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); + + sprintf (directive, " __TIME__ \"%02d:%02d:%02d\"\n", + timebuf->tm_hour, timebuf->tm_min, timebuf->tm_sec); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], pfile, dp); + + if (!CPP_TRADITIONAL (pfile)) + { + sprintf (directive, " __STDC__ 1"); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], + pfile, dp); + } + if (CPP_OPTIONS (pfile)->objc) + { + sprintf (directive, " __OBJC__ 1"); + output_line_command (pfile, 0, same_file); + pass_thru_directive (directive, &directive[strlen (directive)], + pfile, dp); + } + } +} + +/* Return 1 iff a token ending in C1 followed directly by a token C2 + could cause mis-tokenization. */ + +static int +unsafe_chars (c1, c2) + int c1, c2; +{ + switch (c1) + { + case '+': case '-': + if (c2 == c1 || c2 == '=') + return 1; + goto letter; + case '.': + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + case 'e': case 'E': + if (c2 == '-' || c2 == '+') + return 1; /* could extend a pre-processing number */ + goto letter; + case 'L': + if (c2 == '\'' || c2 == '\"') + return 1; /* Could turn into L"xxx" or L'xxx'. */ + goto letter; + letter: + case '_': + case 'a': case 'b': case 'c': case 'd': case 'f': + case 'g': case 'h': case 'i': case 'j': case 'k': case 'l': + case 'm': case 'n': case 'o': case 'p': case 'q': case 'r': + case 's': case 't': case 'u': case 'v': case 'w': case 'x': + case 'y': case 'z': + case 'A': case 'B': case 'C': case 'D': case 'F': + case 'G': case 'H': case 'I': case 'J': case 'K': + case 'M': case 'N': case 'O': case 'P': case 'Q': case 'R': + case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': + case 'Y': case 'Z': + /* We're in the middle of either a name or a pre-processing number. */ + return (is_idchar[c2] || c2 == '.'); + case '<': case '>': case '!': case '%': case '#': case ':': + case '^': case '&': case '|': case '*': case '/': case '=': + return (c2 == c1 || c2 == '='); + } + return 0; +} + +/* Expand a macro call. + HP points to the symbol that is the macro being called. + Put the result of expansion onto the input stack + so that subsequent input by our caller will use it. + + If macro wants arguments, caller has already verified that + an argument list follows; arguments come from the input stack. */ + +static void +macroexpand (pfile, hp) + cpp_reader *pfile; + HASHNODE *hp; +{ + int nargs; + DEFINITION *defn = hp->value.defn; + register U_CHAR *xbuf; + int xbuf_len; + struct argdata *args; + long old_written = CPP_WRITTEN (pfile); +#if 0 + int start_line = instack[indepth].lineno; +#endif + int rest_args, rest_zero; + register int i; + +#if 0 + CHECK_DEPTH (return;); +#endif + +#if 0 + /* This macro is being used inside a #if, which means it must be */ + /* recorded as a precondition. */ + if (pcp_inside_if && pcp_outfile && defn->predefined) + dump_single_macro (hp, pcp_outfile); +#endif + + nargs = defn->nargs; + + if (nargs >= 0) + { + char *parse_error = 0; + enum cpp_token token; + + args = (struct argdata *) alloca ((nargs + 1) * sizeof (struct argdata)); + + for (i = 0; i < nargs; i++) + { + args[i].raw = args[i].expanded = 0; + args[i].raw_length = 0; + args[i].expand_length = args[i].stringified_length = -1; + args[i].use_count = 0; + } + + /* Parse all the macro args that are supplied. I counts them. + The first NARGS args are stored in ARGS. + The rest are discarded. If rest_args is set then we assume + macarg absorbed the rest of the args. */ + i = 0; + rest_args = 0; + rest_args = 0; + FORWARD(1); /* Discard the open-parenthesis before the first arg. */ + do + { + if (rest_args) + continue; + if (i < nargs || (nargs == 0 && i == 0)) + { + /* if we are working on last arg which absorbs rest of args... */ + if (i == nargs - 1 && defn->rest_args) + rest_args = 1; + args[i].raw = CPP_WRITTEN (pfile); + token = macarg (pfile, rest_args); + args[i].raw_length = CPP_WRITTEN (pfile) - args[i].raw; + args[i].newlines = 0; /* FIXME */ + } + else + token = macarg (pfile, 0); + if (token == CPP_EOF || token == CPP_POP) + { + parse_error = "unterminated macro call"; +#if 1 + cpp_error_with_line (pfile, line_for_error (0), parse_error); +#else + cpp_error_with_line (pfile, line_for_error (start_line), parse_error); +#endif + break; + } + i++; + } while (token == CPP_COMMA); + + /* If we got one arg but it was just whitespace, call that 0 args. */ + if (i == 1) + { + register U_CHAR *bp = ARG_BASE + args[0].raw; + register U_CHAR *lim = bp + args[0].raw_length; + /* cpp.texi says for foo ( ) we provide one argument. + However, if foo wants just 0 arguments, treat this as 0. */ + if (nargs == 0) + while (bp != lim && is_space[*bp]) bp++; + if (bp == lim) + i = 0; + } + + /* Don't output an error message if we have already output one for + a parse error above. */ + rest_zero = 0; + if (nargs == 0 && i > 0) + { + if (! parse_error) + cpp_error (pfile, "arguments given to macro `%s'", hp->name); + } + else if (i < nargs) + { + /* traditional C allows foo() if foo wants one argument. */ + if (nargs == 1 && i == 0 && CPP_TRADITIONAL (pfile)) + ; + /* the rest args token is allowed to absorb 0 tokens */ + else if (i == nargs - 1 && defn->rest_args) + rest_zero = 1; + else if (parse_error) + ; + else if (i == 0) + cpp_error (pfile, "macro `%s' used without args", hp->name); + else if (i == 1) + cpp_error (pfile, "macro `%s' used with just one arg", hp->name); + else + cpp_error (pfile, "macro `%s' used with only %d args", + hp->name, i); + } + else if (i > nargs) + { + if (! parse_error) + cpp_error (pfile, + "macro `%s' used with too many (%d) args", hp->name, i); + } + } + + /* If macro wants zero args, we parsed the arglist for checking only. + Read directly from the macro definition. */ + if (nargs <= 0) + { + xbuf = defn->expansion; + xbuf_len = defn->length; + } + else + { + register U_CHAR *exp = defn->expansion; + register int offset; /* offset in expansion, + copied a piece at a time */ + register int totlen; /* total amount of exp buffer filled so far */ + + register struct reflist *ap, *last_ap; + + /* Macro really takes args. Compute the expansion of this call. */ + + /* Compute length in characters of the macro's expansion. + Also count number of times each arg is used. */ + xbuf_len = defn->length; + for (ap = defn->pattern; ap != NULL; ap = ap->next) + { + if (ap->stringify) + { + register struct argdata *arg = &args[ap->argno]; + /* Stringify it it hasn't already been */ + if (arg->stringified_length < 0) + { + int arglen = arg->raw_length; + int escaped = 0; + int in_string = 0; + int c; + /* Initially need_space is -1. Otherwise, 1 means the + previous character was a space, but we suppressed it; + 0 means the previous character was a non-space. */ + int need_space = -1; + i = 0; + arg->stringified = CPP_WRITTEN (pfile); + if (!CPP_TRADITIONAL (pfile)) + CPP_PUTC (pfile, '\"'); /* insert beginning quote */ + for (; i < arglen; i++) + { + c = (ARG_BASE + arg->raw)[i]; + + if (! in_string) + { + /* Internal sequences of whitespace are replaced by + one space except within an string or char token.*/ + if (is_space[c]) + { + if (need_space == 0) + need_space = 1; + continue; + } + else if (need_space > 0) + CPP_PUTC (pfile, ' '); + need_space = 0; + } + + if (escaped) + escaped = 0; + else + { + if (c == '\\') + escaped = 1; + if (in_string) + { + if (c == in_string) + in_string = 0; + } + else if (c == '\"' || c == '\'') + in_string = c; + } + + /* Escape these chars */ + if (c == '\"' || (in_string && c == '\\')) + CPP_PUTC (pfile, '\\'); + if (isprint (c)) + CPP_PUTC (pfile, c); + else + { + CPP_RESERVE (pfile, 4); + sprintf (CPP_PWRITTEN (pfile), "\\%03o", + (unsigned int) c); + CPP_ADJUST_WRITTEN (pfile, 4); + } + } + if (!CPP_TRADITIONAL (pfile)) + CPP_PUTC (pfile, '\"'); /* insert ending quote */ + arg->stringified_length + = CPP_WRITTEN (pfile) - arg->stringified; + } + xbuf_len += args[ap->argno].stringified_length; + } + else if (ap->raw_before || ap->raw_after || CPP_TRADITIONAL (pfile)) + /* Add 4 for two newline-space markers to prevent + token concatenation. */ + xbuf_len += args[ap->argno].raw_length + 4; + else + { + /* We have an ordinary (expanded) occurrence of the arg. + So compute its expansion, if we have not already. */ + if (args[ap->argno].expand_length < 0) + { + args[ap->argno].expanded = CPP_WRITTEN (pfile); + pfile->output_escapes++; + cpp_expand_to_buffer (pfile, + ARG_BASE + args[ap->argno].raw, + args[ap->argno].raw_length); + + pfile->output_escapes--; + args[ap->argno].expand_length + = CPP_WRITTEN (pfile) - args[ap->argno].expanded; + } + + /* Add 4 for two newline-space markers to prevent + token concatenation. */ + xbuf_len += args[ap->argno].expand_length + 4; + } + if (args[ap->argno].use_count < 10) + args[ap->argno].use_count++; + } + + xbuf = (U_CHAR *) xmalloc (xbuf_len + 1); + + /* Generate in XBUF the complete expansion + with arguments substituted in. + TOTLEN is the total size generated so far. + OFFSET is the index in the definition + of where we are copying from. */ + offset = totlen = 0; + for (last_ap = NULL, ap = defn->pattern; ap != NULL; + last_ap = ap, ap = ap->next) + { + register struct argdata *arg = &args[ap->argno]; + int count_before = totlen; + + /* Add chars to XBUF. */ + for (i = 0; i < ap->nchars; i++, offset++) + xbuf[totlen++] = exp[offset]; + + /* If followed by an empty rest arg with concatenation, + delete the last run of nonwhite chars. */ + if (rest_zero && totlen > count_before + && ((ap->rest_args && ap->raw_before) + || (last_ap != NULL && last_ap->rest_args + && last_ap->raw_after))) + { + /* Delete final whitespace. */ + while (totlen > count_before && is_space[xbuf[totlen - 1]]) + totlen--; + + /* Delete the nonwhites before them. */ + while (totlen > count_before && ! is_space[xbuf[totlen - 1]]) + totlen--; + } + + if (ap->stringify != 0) + { + bcopy (ARG_BASE + arg->stringified, + xbuf + totlen, arg->stringified_length); + totlen += arg->stringified_length; + } + else if (ap->raw_before || ap->raw_after || CPP_TRADITIONAL (pfile)) + { + U_CHAR *p1 = ARG_BASE + arg->raw; + U_CHAR *l1 = p1 + arg->raw_length; + if (ap->raw_before) + { + while (p1 != l1 && is_space[*p1]) p1++; + while (p1 != l1 && is_idchar[*p1]) + xbuf[totlen++] = *p1++; + } + if (ap->raw_after) + { + /* Arg is concatenated after: delete trailing whitespace, + whitespace markers, and no-reexpansion markers. */ + while (p1 != l1) + { + if (is_space[l1[-1]]) l1--; + else if (l1[-1] == '-') + { + U_CHAR *p2 = l1 - 1; + /* If a `-' is preceded by an odd number of newlines then it + and the last newline are a no-reexpansion marker. */ + while (p2 != p1 && p2[-1] == '\n') p2--; + if ((l1 - 1 - p2) & 1) { + l1 -= 2; + } + else break; + } + else break; + } + } + + bcopy (p1, xbuf + totlen, l1 - p1); + totlen += l1 - p1; + } + else + { + U_CHAR *expanded = ARG_BASE + arg->expanded; + if (!ap->raw_before && totlen > 0 && arg->expand_length + && !CPP_TRADITIONAL(pfile) + && unsafe_chars (xbuf[totlen-1], expanded[0])) + xbuf[totlen++] = ' '; + + bcopy (expanded, xbuf + totlen, arg->expand_length); + totlen += arg->expand_length; + + if (!ap->raw_after && totlen > 0 && offset < defn->length + && !CPP_TRADITIONAL(pfile) + && unsafe_chars (xbuf[totlen-1], exp[offset])) + xbuf[totlen++] = ' '; + + /* If a macro argument with newlines is used multiple times, + then only expand the newlines once. This avoids creating + output lines which don't correspond to any input line, + which confuses gdb and gcov. */ + if (arg->use_count > 1 && arg->newlines > 0) + { + /* Don't bother doing change_newlines for subsequent + uses of arg. */ + arg->use_count = 1; + arg->expand_length + = change_newlines (expanded, arg->expand_length); + } + } + + if (totlen > xbuf_len) + abort (); + } + + /* if there is anything left of the definition + after handling the arg list, copy that in too. */ + + for (i = offset; i < defn->length; i++) + { + /* if we've reached the end of the macro */ + if (exp[i] == ')') + rest_zero = 0; + if (! (rest_zero && last_ap != NULL && last_ap->rest_args + && last_ap->raw_after)) + xbuf[totlen++] = exp[i]; + } + + xbuf[totlen] = 0; + xbuf_len = totlen; + + } + + /* Now put the expansion on the input stack + so our caller will commence reading from it. */ + push_macro_expansion (pfile, xbuf, xbuf_len, hp); + CPP_BUFFER (pfile)->has_escapes = 1; + + /* Pop the space we've used in the token_buffer for argument expansion. */ + CPP_SET_WRITTEN (pfile, old_written); + + /* Recursive macro use sometimes works traditionally. + #define foo(x,y) bar (x (y,0), y) + foo (foo, baz) */ + + if (!CPP_TRADITIONAL (pfile)) + hp->type = T_DISABLED; +} + +static void +push_macro_expansion (pfile, xbuf, xbuf_len, hp) + cpp_reader *pfile; + register U_CHAR *xbuf; + int xbuf_len; + HASHNODE *hp; +{ + register cpp_buffer *mbuf = cpp_push_buffer (pfile, xbuf, xbuf_len); + mbuf->cleanup = macro_cleanup; + mbuf->data = hp; + + /* The first char of the expansion should be a ' ' added by + collect_expansion. This is to prevent accidental token-pasting + between the text preceding the macro invocation, and the macro + expansion text. + + We would like to avoid adding unneeded spaces (for the sake of + tools that use cpp, such as imake). In some common cases we can + tell that it is safe to omit the space. + + The character before the macro invocation cannot have been an + idchar (or else it would have been pasted with the idchars of + the macro name). Therefore, if the first non-space character + of the expansion is an idchar, we do not need the extra space + to prevent token pasting. + + Also, we don't need the extra space if the first char is '(', + or some other (less common) characters. */ + + if (xbuf[0] == ' ' + && (is_idchar[xbuf[1]] || xbuf[1] == '(' || xbuf[1] == '\'' + || xbuf[1] == '\"')) + mbuf->cur++; +} + +/* Like cpp_get_token, except that it does not read past end-of-line. + Also, horizontal space is skipped, and macros are popped. */ + +static enum cpp_token +get_directive_token (pfile) + cpp_reader *pfile; +{ + for (;;) + { + long old_written = CPP_WRITTEN (pfile); + enum cpp_token token; + cpp_skip_hspace (pfile); + if (PEEKC () == '\n') + return CPP_VSPACE; + token = cpp_get_token (pfile); + switch (token) + { + case CPP_POP: + if (! CPP_IS_MACRO_BUFFER (CPP_BUFFER (pfile))) + return token; + /* ... else fall though ... */ + case CPP_HSPACE: case CPP_COMMENT: + CPP_SET_WRITTEN (pfile, old_written); + break; + default: + return token; + } + } +} + +/* Handle #include and #import. + This function expects to see "fname" or <fname> on the input. + + The input is normally in part of the output_buffer following + CPP_WRITTEN, and will get overwriiten by output_line_command. + I.e. in input file specification has been popped by handle_directive. + This is safe. */ + +static int +do_include (pfile, keyword, unused1, unused2) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *unused1, *unused2; +{ + int importing = (keyword->type == T_IMPORT); + int skip_dirs = (keyword->type == T_INCLUDE_NEXT); + char *fname; /* Dynamically allocated fname buffer */ + char *pcftry; + char *pcfname; + U_CHAR *fbeg, *fend; /* Beginning and end of fname */ + enum cpp_token token; + + /* Chain of dirs to search */ + struct file_name_list *search_start = CPP_OPTIONS (pfile)->include; + struct file_name_list dsp[1]; /* First in chain, if #include "..." */ + struct file_name_list *searchptr = 0; + long old_written = CPP_WRITTEN (pfile); + + int flen; + + int f; /* file number */ + + int retried = 0; /* Have already tried macro + expanding the include line*/ + int angle_brackets = 0; /* 0 for "...", 1 for <...> */ + int pcf = -1; + char *pcfbuf; + int pcfbuflimit; + int pcfnum; + f= -1; /* JF we iz paranoid! */ + + if (importing && CPP_OPTIONS (pfile)->warn_import + && !CPP_OPTIONS (pfile)->inhibit_warnings + && !CPP_BUFFER (pfile)->system_header_p && !pfile->import_warning) + { + pfile->import_warning = 1; + cpp_warning (pfile, "using `#import' is not recommended"); + fprintf (stderr, "The fact that a certain header file need not be processed more than once\n"); + fprintf (stderr, "should be indicated in the header file, not where it is used.\n"); + fprintf (stderr, "The best way to do this is with a conditional of this form:\n\n"); + fprintf (stderr, " #ifndef _FOO_H_INCLUDED\n"); + fprintf (stderr, " #define _FOO_H_INCLUDED\n"); + fprintf (stderr, " ... <real contents of file> ...\n"); + fprintf (stderr, " #endif /* Not _FOO_H_INCLUDED */\n\n"); + fprintf (stderr, "Then users can use `#include' any number of times.\n"); + fprintf (stderr, "GNU C automatically avoids processing the file more than once\n"); + fprintf (stderr, "when it is equipped with such a conditional.\n"); + } + + pfile->parsing_include_directive++; + token = get_directive_token (pfile); + pfile->parsing_include_directive--; + + if (token == CPP_STRING) + { + /* FIXME - check no trailing garbage */ + fbeg = pfile->token_buffer + old_written + 1; + fend = CPP_PWRITTEN (pfile) - 1; + if (fbeg[-1] == '<') + { + angle_brackets = 1; + /* If -I-, start with the first -I dir after the -I-. */ + if (CPP_OPTIONS (pfile)->first_bracket_include) + search_start = CPP_OPTIONS (pfile)->first_bracket_include; + } + /* If -I- was specified, don't search current dir, only spec'd ones. */ + else if (! CPP_OPTIONS (pfile)->ignore_srcdir) + { + cpp_buffer *fp; + /* We have "filename". Figure out directory this source + file is coming from and put it on the front of the list. */ + + for (fp = CPP_BUFFER (pfile); fp != NULL; fp = CPP_PREV_BUFFER (fp)) + { + int n; + char *ep,*nam; + + if ((nam = fp->nominal_fname) != NULL) + { + /* Found a named file. Figure out dir of the file, + and put it in front of the search list. */ + dsp[0].next = search_start; + search_start = dsp; +#ifndef VMS + ep = rindex (nam, '/'); +#else /* VMS */ + ep = rindex (nam, ']'); + if (ep == NULL) ep = rindex (nam, '>'); + if (ep == NULL) ep = rindex (nam, ':'); + if (ep != NULL) ep++; +#endif /* VMS */ + if (ep != NULL) + { + n = ep - nam; + dsp[0].fname = (char *) alloca (n + 1); + strncpy (dsp[0].fname, nam, n); + dsp[0].fname[n] = '\0'; + if (n + INCLUDE_LEN_FUDGE > pfile->max_include_len) + pfile->max_include_len = n + INCLUDE_LEN_FUDGE; + } + else + { + dsp[0].fname = 0; /* Current directory */ + } + dsp[0].got_name_map = 0; + break; + } + } + } + } +#ifdef VMS + else if (token == CPP_NAME) + { + /* + * Support '#include xyz' like VAX-C to allow for easy use of all the + * decwindow include files. It defaults to '#include <xyz.h>' (so the + * code from case '<' is repeated here) and generates a warning. + */ + cpp_warning (pfile, + "VAX-C-style include specification found, use '#include <filename.h>' !"); + angle_brackets = 1; + /* If -I-, start with the first -I dir after the -I-. */ + if (CPP_OPTIONS (pfile)->first_bracket_include) + search_start = CPP_OPTIONS (pfile)->first_bracket_include; + fbeg = pfile->token_buffer + old_written; + fend = CPP_PWRITTEN (pfile); + } +#endif + else + { + cpp_error (pfile, + "`#%s' expects \"FILENAME\" or <FILENAME>", keyword->name); + CPP_SET_WRITTEN (pfile, old_written); + skip_rest_of_line (pfile); + return 0; + } + + *fend = 0; + + token = get_directive_token (pfile); + if (token != CPP_VSPACE) + { + cpp_error (pfile, "junk at end of `#include'"); + while (token != CPP_VSPACE && token != CPP_EOF && token != CPP_POP) + token = get_directive_token (pfile); + } + + /* For #include_next, skip in the search path + past the dir in which the containing file was found. */ + if (skip_dirs) + { + cpp_buffer *fp; + for (fp = CPP_BUFFER (pfile); fp != NULL; fp = CPP_PREV_BUFFER (fp)) + if (fp->fname != NULL) + { + /* fp->dir is null if the containing file was specified with + an absolute file name. In that case, don't skip anything. */ + if (fp->dir) + search_start = fp->dir->next; + break; + } + } + + CPP_SET_WRITTEN (pfile, old_written); + + flen = fend - fbeg; + + if (flen == 0) + { + cpp_error (pfile, "empty file name in `#%s'", keyword->name); + return 0; + } + + /* Allocate this permanently, because it gets stored in the definitions + of macros. */ + fname = (char *) xmalloc (pfile->max_include_len + flen + 4); + /* + 2 above for slash and terminating null. */ + /* + 2 added for '.h' on VMS (to support '#include filename') */ + + /* If specified file name is absolute, just open it. */ + + if (*fbeg == '/') { + strncpy (fname, fbeg, flen); + fname[flen] = 0; + if (redundant_include_p (pfile, fname)) + return 0; + if (importing) + f = lookup_import (pfile, fname, NULL_PTR); + else + f = open_include_file (fname, NULL_PTR); + if (f == -2) + return 0; /* Already included this file */ + } else { + /* Search directory path, trying to open the file. + Copy each filename tried into FNAME. */ + + for (searchptr = search_start; searchptr; searchptr = searchptr->next) { + if (searchptr->fname) { + /* The empty string in a search path is ignored. + This makes it possible to turn off entirely + a standard piece of the list. */ + if (searchptr->fname[0] == 0) + continue; + strcpy (fname, searchptr->fname); + strcat (fname, "/"); + fname[strlen (fname) + flen] = 0; + } else { + fname[0] = 0; + } + strncat (fname, fbeg, flen); +#ifdef VMS + /* Change this 1/2 Unix 1/2 VMS file specification into a + full VMS file specification */ + if (searchptr->fname && (searchptr->fname[0] != 0)) { + /* Fix up the filename */ + hack_vms_include_specification (fname); + } else { + /* This is a normal VMS filespec, so use it unchanged. */ + strncpy (fname, fbeg, flen); + fname[flen] = 0; + /* if it's '#include filename', add the missing .h */ + if (index(fname,'.')==NULL) { + strcat (fname, ".h"); + } + } +#endif /* VMS */ + if (importing) + f = lookup_import (pfile, fname, searchptr); + else + f = open_include_file (fname, searchptr); + if (f == -2) + return 0; /* Already included this file */ +#ifdef EACCES + else if (f == -1 && errno == EACCES) + cpp_warning (pfile, "Header file %s exists, but is not readable", + fname); +#endif + if (redundant_include_p (pfile, fname)) { + close (f); + return 0; + } + if (f >= 0) + break; + } + } + + if (f < 0) + { + /* A file that was not found. */ + strncpy (fname, fbeg, flen); + fname[flen] = 0; + /* If generating dependencies and -MG was specified, we assume missing + files are leaf files, living in the same directory as the source file + or other similar place; these missing files may be generated from + other files and may not exist yet (eg: y.tab.h). */ + + if (CPP_OPTIONS(pfile)->print_deps_missing_files + && CPP_PRINT_DEPS (pfile) + > (angle_brackets || (pfile->system_include_depth > 0))) + { + /* If it was requested as a system header file, + then assume it belongs in the first place to look for such. */ + if (angle_brackets) + { + for (searchptr = search_start; searchptr; + searchptr = searchptr->next) + { + if (searchptr->fname) + { + char *p; + + if (searchptr->fname[0] == 0) + continue; + p = xmalloc (strlen (searchptr->fname) + + strlen (fname) + 2); + strcpy (p, searchptr->fname); + strcat (p, "/"); + strcat (p, fname); + deps_output (pfile, p, ' '); + break; + } + } + } + else + { + /* Otherwise, omit the directory, as if the file existed + in the directory with the source. */ + deps_output (pfile, fname, ' '); + } + } + /* If -M was specified, and this header file won't be added to the + dependency list, then don't count this as an error, because we can + still produce correct output. Otherwise, we can't produce correct + output, because there may be dependencies we need inside the missing + file, and we don't know what directory this missing file exists in.*/ + else if (CPP_PRINT_DEPS (pfile) + && (CPP_PRINT_DEPS (pfile) + <= (angle_brackets || (pfile->system_include_depth > 0)))) + cpp_warning (pfile, "No include path in which to find %s", fname); + else if (search_start) + cpp_error_from_errno (pfile, fname); + else + cpp_error (pfile, "No include path in which to find %s", fname); + } + else { + struct stat stat_f; + + /* Check to see if this include file is a once-only include file. + If so, give up. */ + + struct file_name_list* ptr; + + for (ptr = pfile->dont_repeat_files; ptr; ptr = ptr->next) { + if (!strcmp (ptr->fname, fname)) { + close (f); + return 0; /* This file was once'd. */ + } + } + + for (ptr = pfile->all_include_files; ptr; ptr = ptr->next) { + if (!strcmp (ptr->fname, fname)) + break; /* This file was included before. */ + } + + if (ptr == 0) { + /* This is the first time for this file. */ + /* Add it to list of files included. */ + + ptr = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); + ptr->control_macro = 0; + ptr->c_system_include_path = 0; + ptr->next = pfile->all_include_files; + pfile->all_include_files = ptr; + ptr->fname = savestring (fname); + ptr->got_name_map = 0; + + /* For -M, add this file to the dependencies. */ + if (CPP_PRINT_DEPS (pfile) + > (angle_brackets || (pfile->system_include_depth > 0))) + deps_output (pfile, fname, ' '); + } + + /* Handle -H option. */ + if (CPP_OPTIONS(pfile)->print_include_names) + { + cpp_buffer *buf = CPP_BUFFER (pfile); + while ((buf = CPP_PREV_BUFFER (buf)) != NULL) + putc ('.', stderr); + fprintf (stderr, "%s\n", fname); + } + + if (angle_brackets) + pfile->system_include_depth++; + + /* Actually process the file. */ + + /* Record file on "seen" list for #import. */ + add_import (pfile, f, fname); + + pcftry = (char *) alloca (strlen (fname) + 30); + pcfbuf = 0; + pcfnum = 0; + + fstat (f, &stat_f); + +#if 0 + if (!no_precomp) + do { + sprintf (pcftry, "%s%d", fname, pcfnum++); + + pcf = open (pcftry, O_RDONLY, 0666); + if (pcf != -1) + { + struct stat s; + + fstat (pcf, &s); + if (bcmp (&stat_f.st_ino, &s.st_ino, sizeof (s.st_ino)) + || stat_f.st_dev != s.st_dev) + { + pcfbuf = check_precompiled (pcf, fname, &pcfbuflimit); + /* Don't need it any more. */ + close (pcf); + } + else + { + /* Don't need it at all. */ + close (pcf); + break; + } + } + } while (pcf != -1 && !pcfbuf); +#endif + + /* Actually process the file */ + if (finclude (pfile, f, fname, is_system_include (pfile, fname), + searchptr)) + { + output_line_command (pfile, 0, enter_file); + pfile->only_seen_white = 2; + } + + if (angle_brackets) + pfile->system_include_depth--; + } + return 0; +} + +/* Return nonzero if there is no need to include file NAME + because it has already been included and it contains a conditional + to make a repeated include do nothing. */ + +static int +redundant_include_p (pfile, name) + cpp_reader *pfile; + char *name; +{ + struct file_name_list *l = pfile->all_include_files; + for (; l; l = l->next) + if (! strcmp (name, l->fname) + && l->control_macro + && cpp_lookup (pfile, l->control_macro, -1, -1)) + return 1; + return 0; +} + +/* Return nonzero if the given FILENAME is an absolute pathname which + designates a file within one of the known "system" include file + directories. We assume here that if the given FILENAME looks like + it is the name of a file which resides either directly in a "system" + include file directory, or within any subdirectory thereof, then the + given file must be a "system" include file. This function tells us + if we should suppress pedantic errors/warnings for the given FILENAME. + + The value is 2 if the file is a C-language system header file + for which C++ should (on most systems) assume `extern "C"'. */ + +static int +is_system_include (pfile, filename) + cpp_reader *pfile; + register char *filename; +{ + struct file_name_list *searchptr; + + for (searchptr = CPP_OPTIONS (pfile)->first_system_include; searchptr; + searchptr = searchptr->next) + if (searchptr->fname) { + register char *sys_dir = searchptr->fname; + register unsigned length = strlen (sys_dir); + + if (! strncmp (sys_dir, filename, length) && filename[length] == '/') + { + if (searchptr->c_system_include_path) + return 2; + else + return 1; + } + } + return 0; +} + + +/* + * Install a name in the assertion hash table. + * + * If LEN is >= 0, it is the length of the name. + * Otherwise, compute the length by scanning the entire name. + * + * If HASH is >= 0, it is the precomputed hash code. + * Otherwise, compute the hash code. + */ +static ASSERTION_HASHNODE * +assertion_install (pfile, name, len, hash) + cpp_reader *pfile; + U_CHAR *name; + int len; + int hash; +{ + register ASSERTION_HASHNODE *hp; + register int i, bucket; + register U_CHAR *p, *q; + + i = sizeof (ASSERTION_HASHNODE) + len + 1; + hp = (ASSERTION_HASHNODE *) xmalloc (i); + bucket = hash; + hp->bucket_hdr = &pfile->assertion_hashtab[bucket]; + hp->next = pfile->assertion_hashtab[bucket]; + pfile->assertion_hashtab[bucket] = hp; + hp->prev = NULL; + if (hp->next != NULL) + hp->next->prev = hp; + hp->length = len; + hp->value = 0; + hp->name = ((U_CHAR *) hp) + sizeof (ASSERTION_HASHNODE); + p = hp->name; + q = name; + for (i = 0; i < len; i++) + *p++ = *q++; + hp->name[len] = 0; + return hp; +} +/* + * find the most recent hash node for name name (ending with first + * non-identifier char) installed by install + * + * If LEN is >= 0, it is the length of the name. + * Otherwise, compute the length by scanning the entire name. + * + * If HASH is >= 0, it is the precomputed hash code. + * Otherwise, compute the hash code. + */ + +static ASSERTION_HASHNODE * +assertion_lookup (pfile, name, len, hash) + cpp_reader *pfile; + U_CHAR *name; + int len; + int hash; +{ + register ASSERTION_HASHNODE *bucket; + + bucket = pfile->assertion_hashtab[hash]; + while (bucket) { + if (bucket->length == len && strncmp (bucket->name, name, len) == 0) + return bucket; + bucket = bucket->next; + } + return NULL; +} + +static void +delete_assertion (hp) + ASSERTION_HASHNODE *hp; +{ + + if (hp->prev != NULL) + hp->prev->next = hp->next; + if (hp->next != NULL) + hp->next->prev = hp->prev; + + /* make sure that the bucket chain header that + the deleted guy was on points to the right thing afterwards. */ + if (hp == *hp->bucket_hdr) + *hp->bucket_hdr = hp->next; + + free (hp); +} + +/* Convert a character string literal into a nul-terminated string. + The input string is [IN ... LIMIT). + The result is placed in RESULT. RESULT can be the same as IN. + The value returned in the end of the string written to RESULT, + or NULL on error. */ + +static U_CHAR* +convert_string (pfile, result, in, limit, handle_escapes) + cpp_reader *pfile; + register U_CHAR *result, *in, *limit; + int handle_escapes; +{ + U_CHAR c; + c = *in++; + if (c != '\"') + return NULL; + while (in < limit) + { + U_CHAR c = *in++; + switch (c) + { + case '\0': + return NULL; + case '\"': + limit = in; + break; + case '\\': + if (handle_escapes) + { + char *bpc = (char *) in; + int i = (U_CHAR) cpp_parse_escape (pfile, &bpc); + in = (U_CHAR *) bpc; + if (i >= 0) + *result++ = (U_CHAR)c; + break; + } + /* else fall through */ + default: + *result++ = c; + } + } + *result = 0; + return result; +} + +/* + * interpret #line command. Remembers previously seen fnames + * in its very own hash table. + */ +#define FNAME_HASHSIZE 37 + +static int +do_line (pfile, keyword) + cpp_reader *pfile; + struct directive *keyword; +{ + cpp_buffer *ip = CPP_BUFFER (pfile); + int new_lineno; + long old_written = CPP_WRITTEN (pfile); + enum file_change_code file_change = same_file; + enum cpp_token token; + int i; + + token = get_directive_token (pfile); + + if (token != CPP_NUMBER + || !isdigit(pfile->token_buffer[old_written])) + { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } + + /* The Newline at the end of this line remains to be processed. + To put the next line at the specified line number, + we must store a line number now that is one less. */ + new_lineno = atoi (pfile->token_buffer + old_written) - 1; + CPP_SET_WRITTEN (pfile, old_written); + + /* NEW_LINENO is one less than the actual line number here. */ + if (CPP_PEDANTIC (pfile) && new_lineno < 0) + cpp_pedwarn (pfile, "line number out of range in `#line' command"); + +#if 0 /* #line 10"foo.c" is supposed to be allowed. */ + if (PEEKC() && !is_space[PEEKC()]) { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } +#endif + + token = get_directive_token (pfile); + + if (token == CPP_STRING) { + U_CHAR *fname = pfile->token_buffer + old_written; + U_CHAR *end_name; + static HASHNODE *fname_table[FNAME_HASHSIZE]; + HASHNODE *hp, **hash_bucket; + U_CHAR *p; + long num_start; + int fname_length; + + /* Turn the file name, which is a character string literal, + into a null-terminated string. Do this in place. */ + end_name = convert_string (pfile, fname, fname, CPP_PWRITTEN (pfile), 1); + if (end_name == NULL) + { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } + + fname_length = end_name - fname; + + num_start = CPP_WRITTEN (pfile); + token = get_directive_token (pfile); + if (token != CPP_VSPACE && token != CPP_EOF && token != CPP_POP) { + p = pfile->token_buffer + num_start; + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "garbage at end of `#line' command"); + + if (token != CPP_NUMBER || *p < '0' || *p > '4' || p[1] != '\0') + { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } + if (*p == '1') + file_change = enter_file; + else if (*p == 2) + file_change = leave_file; + else if (*p == 3) + ip->system_header_p = 1; + else /* if (*p == 4) */ + ip->system_header_p = 2; + + CPP_SET_WRITTEN (pfile, num_start); + token = get_directive_token (pfile); + p = pfile->token_buffer + num_start; + if (token == CPP_NUMBER && p[1] == '\0' && (*p == '3' || *p== '4')) { + ip->system_header_p = *p == 3 ? 1 : 2; + token = get_directive_token (pfile); + } + if (token != CPP_VSPACE) { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } + } + + hash_bucket = + &fname_table[hashf (fname, fname_length, FNAME_HASHSIZE)]; + for (hp = *hash_bucket; hp != NULL; hp = hp->next) + if (hp->length == fname_length && + strncmp (hp->value.cpval, fname, fname_length) == 0) { + ip->nominal_fname = hp->value.cpval; + break; + } + if (hp == 0) { + /* Didn't find it; cons up a new one. */ + hp = (HASHNODE *) xcalloc (1, sizeof (HASHNODE) + fname_length + 1); + hp->next = *hash_bucket; + *hash_bucket = hp; + + hp->length = fname_length; + ip->nominal_fname = hp->value.cpval = ((char *) hp) + sizeof (HASHNODE); + bcopy (fname, hp->value.cpval, fname_length); + } + } + else if (token != CPP_VSPACE && token != CPP_EOF) { + cpp_error (pfile, "invalid format `#line' command"); + goto bad_line_directive; + } + + ip->lineno = new_lineno; + bad_line_directive: + skip_rest_of_line (pfile); + CPP_SET_WRITTEN (pfile, old_written); + output_line_command (pfile, 0, file_change); + return 0; +} + +/* + * remove the definition of a symbol from the symbol table. + * according to un*x /lib/cpp, it is not an error to undef + * something that has no definitions, so it isn't one here either. + */ + +static int +do_undef (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int sym_length; + HASHNODE *hp; + U_CHAR *orig_buf = buf; + +#if 0 + /* If this is a precompiler run (with -pcp) pass thru #undef commands. */ + if (pcp_outfile && keyword) + pass_thru_directive (buf, limit, pfile, keyword); +#endif + + SKIP_WHITE_SPACE (buf); + sym_length = check_macro_name (pfile, buf, "macro"); + + while ((hp = cpp_lookup (pfile, buf, sym_length, -1)) != NULL) + { + /* If we are generating additional info for debugging (with -g) we + need to pass through all effective #undef commands. */ + if (CPP_OPTIONS (pfile)->debug_output && keyword) + pass_thru_directive (orig_buf, limit, pfile, keyword); + if (hp->type != T_MACRO) + cpp_warning (pfile, "undefining `%s'", hp->name); + delete_macro (hp); + } + + if (CPP_PEDANTIC (pfile)) { + buf += sym_length; + SKIP_WHITE_SPACE (buf); + if (buf != limit) + cpp_pedwarn (pfile, "garbage after `#undef' directive"); + } + return 0; +} + +/* + * Report an error detected by the program we are processing. + * Use the text of the line in the error message. + * (We use error because it prints the filename & line#.) + */ + +static int +do_error (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int length = limit - buf; + U_CHAR *copy = (U_CHAR *) xmalloc (length + 1); + bcopy (buf, copy, length); + copy[length] = 0; + SKIP_WHITE_SPACE (copy); + cpp_error (pfile, "#error %s", copy); + return 0; +} + +/* + * Report a warning detected by the program we are processing. + * Use the text of the line in the warning message, then continue. + * (We use error because it prints the filename & line#.) + */ + +static int +do_warning (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int length = limit - buf; + U_CHAR *copy = (U_CHAR *) xmalloc (length + 1); + bcopy (buf, copy, length); + copy[length] = 0; + SKIP_WHITE_SPACE (copy); + cpp_warning (pfile, "#warning %s", copy); + return 0; +} + +/* Remember the name of the current file being read from so that we can + avoid ever including it again. */ + +static int +do_once (pfile) + cpp_reader *pfile; +{ + cpp_buffer *ip = NULL; + struct file_name_list *new; + + for (ip = CPP_BUFFER (pfile); ; ip = CPP_PREV_BUFFER (ip)) + { + if (ip == NULL) + return 0; + if (ip->fname != NULL) + break; + } + + + new = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); + new->next = pfile->dont_repeat_files; + pfile->dont_repeat_files = new; + new->fname = savestring (ip->fname); + new->control_macro = 0; + new->got_name_map = 0; + new->c_system_include_path = 0; + + return 0; +} + +/* #ident has already been copied to the output file, so just ignore it. */ + +static int +do_ident (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ +/* long old_written = CPP_WRITTEN (pfile);*/ + int len; + + /* Allow #ident in system headers, since that's not user's fault. */ + if (CPP_PEDANTIC (pfile) && !CPP_BUFFER (pfile)->system_header_p) + cpp_pedwarn (pfile, "ANSI C does not allow `#ident'"); + + /* Leave rest of line to be read by later calls to cpp_get_token. */ + + return 0; +} + +/* #pragma and its argument line have already been copied to the output file. + Just check for some recognized pragmas that need validation here. */ + +static int +do_pragma (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + while (*buf == ' ' || *buf == '\t') + buf++; + if (!strncmp (buf, "once", 4)) { + /* Allow #pragma once in system headers, since that's not the user's + fault. */ + if (!CPP_BUFFER (pfile)->system_header_p) + cpp_warning (pfile, "`#pragma once' is obsolete"); + do_once (pfile); + } + + if (!strncmp (buf, "implementation", 14)) { + /* Be quiet about `#pragma implementation' for a file only if it hasn't + been included yet. */ + struct file_name_list *ptr; + U_CHAR *p = buf + 14, *fname, *inc_fname; + int fname_len; + SKIP_WHITE_SPACE (p); + if (*p == '\n' || *p != '\"') + return 0; + + fname = p + 1; + p = (U_CHAR *) index (fname, '\"'); + fname_len = p != NULL ? p - fname : strlen (fname); + + for (ptr = pfile->all_include_files; ptr; ptr = ptr->next) { + inc_fname = (U_CHAR *) rindex (ptr->fname, '/'); + inc_fname = inc_fname ? inc_fname + 1 : (U_CHAR *) ptr->fname; + if (inc_fname && !strncmp (inc_fname, fname, fname_len)) + cpp_warning (pfile, + "`#pragma implementation' for `%s' appears after file is included", + fname); + } + } + + return 0; +} + +#if 0 +/* This was a fun hack, but #pragma seems to start to be useful. + By failing to recognize it, we pass it through unchanged to cc1. */ + +/* + * the behavior of the #pragma directive is implementation defined. + * this implementation defines it as follows. + */ + +static int +do_pragma () +{ + close (0); + if (open ("/dev/tty", O_RDONLY, 0666) != 0) + goto nope; + close (1); + if (open ("/dev/tty", O_WRONLY, 0666) != 1) + goto nope; + execl ("/usr/games/hack", "#pragma", 0); + execl ("/usr/games/rogue", "#pragma", 0); + execl ("/usr/new/emacs", "-f", "hanoi", "9", "-kill", 0); + execl ("/usr/local/emacs", "-f", "hanoi", "9", "-kill", 0); +nope: + fatal ("You are in a maze of twisty compiler features, all different"); +} +#endif + +/* Just ignore #sccs, on systems where we define it at all. */ + +static int +do_sccs (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + if (CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "ANSI C does not allow `#sccs'"); + return 0; +} + +/* + * handle #if command by + * 1) inserting special `defined' keyword into the hash table + * that gets turned into 0 or 1 by special_symbol (thus, + * if the luser has a symbol called `defined' already, it won't + * work inside the #if command) + * 2) rescan the input into a temporary output buffer + * 3) pass the output buffer to the yacc parser and collect a value + * 4) clean up the mess left from steps 1 and 2. + * 5) call conditional_skip to skip til the next #endif (etc.), + * or not, depending on the value from step 3. + */ + +static int +do_if (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int value; + + value = eval_if_expression (pfile, buf, limit - buf); + conditional_skip (pfile, value == 0, T_IF, NULL_PTR); + return 0; +} + +/* + * handle a #elif directive by not changing if_stack either. + * see the comment above do_else. + */ + +static int +do_elif (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + int value; + + if (pfile->if_stack == CPP_BUFFER (pfile)->if_stack) { + cpp_error (pfile, "`#elif' not within a conditional"); + return 0; + } else { + if (pfile->if_stack->type != T_IF && pfile->if_stack->type != T_ELIF) { + cpp_error (pfile, "`#elif' after `#else'"); +#if 0 + fprintf (stderr, " (matches line %d", pfile->if_stack->lineno); +#endif + if (pfile->if_stack->fname != NULL && CPP_BUFFER (pfile)->fname != NULL + && strcmp (pfile->if_stack->fname, + CPP_BUFFER (pfile)->nominal_fname) != 0) + fprintf (stderr, ", file %s", pfile->if_stack->fname); + fprintf (stderr, ")\n"); + } + pfile->if_stack->type = T_ELIF; + } + + if (pfile->if_stack->if_succeeded) + skip_if_group (pfile, 0); + else { + value = eval_if_expression (pfile, buf, limit - buf); + if (value == 0) + skip_if_group (pfile, 0); + else { + ++pfile->if_stack->if_succeeded; /* continue processing input */ + output_line_command (pfile, 1, same_file); + } + } + return 0; +} + +/* + * evaluate a #if expression in BUF, of length LENGTH, + * then parse the result as a C expression and return the value as an int. + */ +static int +eval_if_expression (pfile, buf, length) + cpp_reader *pfile; + U_CHAR *buf; + int length; +{ + HASHNODE *save_defined; + int value; + long old_written = CPP_WRITTEN (pfile); + + save_defined = install ("defined", -1, T_SPEC_DEFINED, 0, 0, -1); + pfile->pcp_inside_if = 1; + + value = cpp_parse_expr (pfile); + pfile->pcp_inside_if = 0; + delete_macro (save_defined); /* clean up special symbol */ + + CPP_SET_WRITTEN (pfile, old_written); /* Pop */ + + return value; +} + +/* + * routine to handle ifdef/ifndef. Try to look up the symbol, + * then do or don't skip to the #endif/#else/#elif depending + * on what directive is actually being processed. + */ + +static int +do_xifdef (pfile, keyword, unused1, unused2) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *unused1, *unused2; +{ + int skip; + cpp_buffer *ip = CPP_BUFFER (pfile); + U_CHAR* ident; + int ident_length; + enum cpp_token token; + int start_of_file = 0; + U_CHAR *control_macro = 0; + int old_written = CPP_WRITTEN (pfile); + + /* Detect a #ifndef at start of file (not counting comments). */ + if (ip->fname != 0 && keyword->type == T_IFNDEF) + start_of_file = pfile->only_seen_white == 2; + + pfile->no_macro_expand++; + token = get_directive_token (pfile); + pfile->no_macro_expand--; + + ident = pfile->token_buffer + old_written; + ident_length = CPP_WRITTEN (pfile) - old_written; + CPP_SET_WRITTEN (pfile, old_written); /* Pop */ + + if (token == CPP_VSPACE || token == CPP_POP || token == CPP_EOF) + { + skip = (keyword->type == T_IFDEF); + if (! CPP_TRADITIONAL (pfile)) + cpp_pedwarn (pfile, "`#%s' with no argument", keyword->name); + } + else if (token == CPP_NAME) + { + HASHNODE *hp = cpp_lookup (pfile, ident, ident_length, -1); + skip = (hp == NULL) ^ (keyword->type == T_IFNDEF); + if (start_of_file && !skip) + { + control_macro = (U_CHAR *) xmalloc (ident_length + 1); + bcopy (ident, control_macro, ident_length + 1); + } + } + else + { + skip = (keyword->type == T_IFDEF); + if (! CPP_TRADITIONAL (pfile)) + cpp_error (pfile, "`#%s' with invalid argument", keyword->name); + } + + if (!CPP_TRADITIONAL (pfile)) + { int c; + cpp_skip_hspace (pfile); + c = PEEKC (); + if (c != EOF && c != '\n') + cpp_pedwarn (pfile, "garbage at end of `#%s' argument", keyword->name); + } + skip_rest_of_line (pfile); + +#if 0 + if (pcp_outfile) { + /* Output a precondition for this macro. */ + if (hp && hp->value.defn->predefined) + fprintf (pcp_outfile, "#define %s\n", hp->name); + else { + U_CHAR *cp = buf; + fprintf (pcp_outfile, "#undef "); + while (is_idchar[*cp]) /* Ick! */ + fputc (*cp++, pcp_outfile); + putc ('\n', pcp_outfile); + } +#endif + + conditional_skip (pfile, skip, T_IF, control_macro); + return 0; +} + +/* Push TYPE on stack; then, if SKIP is nonzero, skip ahead. + If this is a #ifndef starting at the beginning of a file, + CONTROL_MACRO is the macro name tested by the #ifndef. + Otherwise, CONTROL_MACRO is 0. */ + +static void +conditional_skip (pfile, skip, type, control_macro) + cpp_reader *pfile; + int skip; + enum node_type type; + U_CHAR *control_macro; +{ + IF_STACK_FRAME *temp; + + temp = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME)); + temp->fname = CPP_BUFFER (pfile)->nominal_fname; +#if 0 + temp->lineno = CPP_BUFFER (pfile)->lineno; +#endif + temp->next = pfile->if_stack; + temp->control_macro = control_macro; + pfile->if_stack = temp; + + pfile->if_stack->type = type; + + if (skip != 0) { + skip_if_group (pfile, 0); + return; + } else { + ++pfile->if_stack->if_succeeded; + output_line_command (pfile, 1, same_file); + } +} + +/* + * skip to #endif, #else, or #elif. adjust line numbers, etc. + * leaves input ptr at the sharp sign found. + * If ANY is nonzero, return at next directive of any sort. + */ +static void +skip_if_group (pfile, any) + cpp_reader *pfile; + int any; +{ + int c; + int at_beg_of_line = 1; + struct directive *kt; + IF_STACK_FRAME *save_if_stack = pfile->if_stack; /* don't pop past here */ +#if 0 + U_CHAR *beg_of_line = bp; +#endif + register int ident_length; + U_CHAR *ident, *after_ident; + struct parse_marker line_start_mark; + + parse_set_mark (&line_start_mark, pfile); + + if (CPP_OPTIONS (pfile)->output_conditionals) { + static char failed[] = "#failed\n"; + CPP_PUTS (pfile, failed, sizeof(failed)-1); + pfile->lineno++; + output_line_command (pfile, 1, same_file); + } + + beg_of_line: + if (CPP_OPTIONS (pfile)->output_conditionals) + { + cpp_buffer *pbuf = CPP_BUFFER (pfile); + U_CHAR *start_line = pbuf->buf + line_start_mark.position; + CPP_PUTS (pfile, start_line, pbuf->cur - start_line); + } + parse_move_mark (&line_start_mark, pfile); + if (!CPP_TRADITIONAL (pfile)) + cpp_skip_hspace (pfile); + c = GETC(); + if (c == '#') + { + int old_written = CPP_WRITTEN (pfile); + cpp_skip_hspace (pfile); + + parse_name (pfile, GETC()); + ident_length = CPP_WRITTEN (pfile) - old_written; + ident = pfile->token_buffer + old_written; + pfile->limit = ident; +#if 0 + if (ident_length == 0) + goto not_a_directive; + + /* Handle # followed by a line number. */ + + /* Avoid error for `###' and similar cases unless -pedantic. */ +#endif + + for (kt = directive_table; kt->length >= 0; kt++) + { + IF_STACK_FRAME *temp; + if (ident_length == kt->length + && strncmp (ident, kt->name, kt->length) == 0) + { + /* If we are asked to return on next directive, do so now. */ + if (any) + goto done; + + switch (kt->type) + { + case T_IF: + case T_IFDEF: + case T_IFNDEF: + temp + = (IF_STACK_FRAME *) xcalloc (1, sizeof (IF_STACK_FRAME)); + temp->next = pfile->if_stack; + pfile->if_stack = temp; +#if 0 + temp->lineno = CPP_BUFFER(pfile)->lineno; +#endif + temp->fname = CPP_BUFFER(pfile)->nominal_fname; + temp->type = kt->type; + break; + case T_ELSE: + case T_ENDIF: + if (CPP_PEDANTIC (pfile) && pfile->if_stack != save_if_stack) + validate_else (pfile, + kt->type == T_ELSE ? "#else" : "#endif"); + case T_ELIF: + if (pfile->if_stack == CPP_BUFFER (pfile)->if_stack) + { + cpp_error (pfile, + "`#%s' not within a conditional", kt->name); + break; + } + else if (pfile->if_stack == save_if_stack) + goto done; /* found what we came for */ + + if (kt->type != T_ENDIF) + { + if (pfile->if_stack->type == T_ELSE) + cpp_error (pfile, "`#else' or `#elif' after `#else'"); + pfile->if_stack->type = kt->type; + break; + } + + temp = pfile->if_stack; + pfile->if_stack = temp->next; + free (temp); + break; + default: ; + } + break; + } + /* Don't let erroneous code go by. */ + if (kt->length < 0 && !CPP_OPTIONS (pfile)->lang_asm + && CPP_PEDANTIC (pfile)) + cpp_pedwarn (pfile, "invalid preprocessor directive name"); + } + c = GETC (); + } + /* We're in the middle of a line. Skip the rest of it. */ + for (;;) { + switch (c) + { + case EOF: + goto done; + case '/': /* possible comment */ + c = skip_comment (pfile, NULL); + if (c == EOF) + goto done; + break; + case '\"': + case '\'': + skip_quoted_string (pfile, c, 0 /* FIXME */); + break; + case '\\': + /* Char after backslash loses its special meaning. */ + if (PEEKC() == '\n') + FORWARD (1); + break; + case '\n': + goto beg_of_line; + break; + } + c = GETC (); + } + done: + if (CPP_OPTIONS (pfile)->output_conditionals) { + static char end_failed[] = "#endfailed\n"; + CPP_PUTS (pfile, end_failed, sizeof(end_failed)-1); + pfile->lineno++; + } + pfile->only_seen_white = 1; + parse_goto_mark (&line_start_mark, pfile); + parse_clear_mark (&line_start_mark); +} + +/* + * handle a #else directive. Do this by just continuing processing + * without changing if_stack ; this is so that the error message + * for missing #endif's etc. will point to the original #if. It + * is possible that something different would be better. + */ + +static int +do_else (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + cpp_buffer *ip = CPP_BUFFER (pfile); + + if (CPP_PEDANTIC (pfile)) + validate_else (pfile, "#else"); + skip_rest_of_line (pfile); + + if (pfile->if_stack == CPP_BUFFER (pfile)->if_stack) { + cpp_error (pfile, "`#else' not within a conditional"); + return 0; + } else { + /* #ifndef can't have its special treatment for containing the whole file + if it has a #else clause. */ + pfile->if_stack->control_macro = 0; + + if (pfile->if_stack->type != T_IF && pfile->if_stack->type != T_ELIF) { + cpp_error (pfile, "`#else' after `#else'"); + fprintf (stderr, " (matches line %d", pfile->if_stack->lineno); + if (strcmp (pfile->if_stack->fname, ip->nominal_fname) != 0) + fprintf (stderr, ", file %s", pfile->if_stack->fname); + fprintf (stderr, ")\n"); + } + pfile->if_stack->type = T_ELSE; + } + + if (pfile->if_stack->if_succeeded) + skip_if_group (pfile, 0); + else { + ++pfile->if_stack->if_succeeded; /* continue processing input */ + output_line_command (pfile, 1, same_file); + } + return 0; +} + +/* + * unstack after #endif command + */ + +static int +do_endif (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + if (CPP_PEDANTIC (pfile)) + validate_else (pfile, "#endif"); + skip_rest_of_line (pfile); + + if (pfile->if_stack == CPP_BUFFER (pfile)->if_stack) + cpp_error (pfile, "unbalanced `#endif'"); + else + { + IF_STACK_FRAME *temp = pfile->if_stack; + pfile->if_stack = temp->next; + if (temp->control_macro != 0) + { + /* This #endif matched a #ifndef at the start of the file. + See if it is at the end of the file. */ + struct parse_marker start_mark; + int c; + + parse_set_mark (&start_mark, pfile); + + for (;;) + { + cpp_skip_hspace (pfile); + c = GETC (); + if (c != '\n') + break; + } + parse_goto_mark (&start_mark, pfile); + parse_clear_mark (&start_mark); + + if (c == EOF) + { + /* If we get here, this #endif ends a #ifndef + that contains all of the file (aside from whitespace). + Arrange not to include the file again + if the macro that was tested is defined. + + Do not do this for the top-level file in a -include or any + file in a -imacros. */ +#if 0 +FIXME! + if (indepth != 0 + && ! (indepth == 1 && pfile->no_record_file) + && ! (pfile->no_record_file && no_output)) +#endif + { + struct file_name_list *ifile = pfile->all_include_files; + + for ( ; ifile != NULL; ifile = ifile->next) + { + if (!strcmp (ifile->fname, CPP_BUFFER (pfile)->fname)) + { + ifile->control_macro = temp->control_macro; + break; + } + } + } + } + } + free (temp); + output_line_command (pfile, 1, same_file); + } + return 0; +} + +/* When an #else or #endif is found while skipping failed conditional, + if -pedantic was specified, this is called to warn about text after + the command name. P points to the first char after the command name. */ + +static void +validate_else (pfile, directive) + cpp_reader *pfile; + char *directive; +{ + int c; + cpp_skip_hspace (pfile); + c = PEEKC (); + if (c != EOF && c != '\n') + cpp_pedwarn (pfile, + "text following `%s' violates ANSI standard", directive); +} + +/* Get the next token, and add it to the tex in pfile->token_buffer. + Return the kind of token we got. */ + + +enum cpp_token +cpp_get_token (pfile) + cpp_reader *pfile; +{ + register int c, c2, c3; + long old_written; + enum cpp_token token; + struct cpp_options *opts = CPP_OPTIONS (pfile); + CPP_BUFFER (pfile)->prev = CPP_BUFFER (pfile)->cur; + get_next: + c = GETC(); + if (c == EOF) + { + handle_eof: + if (CPP_BUFFER (pfile)->seen_eof) + { + if (cpp_pop_buffer (pfile) != CPP_NULL_BUFFER (pfile)) + goto get_next; + else + return CPP_EOF; + } + else + { + cpp_buffer *next_buf + = CPP_PREV_BUFFER (CPP_BUFFER (pfile)); + CPP_BUFFER (pfile)->seen_eof = 1; + if (CPP_BUFFER (pfile)->nominal_fname && next_buf != 0) + { + /* We're about to return from an #include file. + Emit #line information now (as part of the CPP_POP) restult. + But the #line refers to the file we will pop to. */ + cpp_buffer *cur_buffer = CPP_BUFFER (pfile); + CPP_BUFFER (pfile) = next_buf; + pfile->input_stack_listing_current = 0; + output_line_command (pfile, 0, leave_file); + CPP_BUFFER (pfile) = cur_buffer; + } + return CPP_POP; + } + } + else + { + switch (c) + { + long newlines; + struct parse_marker start_mark; + case '/': + if (PEEKC () == '=') + goto op2; + if (opts->put_out_comments) + parse_set_mark (&start_mark, pfile); + newlines = 0; + c = skip_comment (pfile, &newlines); + if (opts->put_out_comments && (c == '/' || c == EOF)) + parse_clear_mark (&start_mark); + if (c == '/') + goto randomchar; + if (c == EOF) + { + cpp_error_with_line (pfile, line_for_error (pfile->start_line), + "unterminated comment"); + goto handle_eof; + } + c = '/'; /* Initial letter of comment. */ + return_comment: + /* Comments are equivalent to spaces. + For -traditional, a comment is equivalent to nothing. */ + if (opts->put_out_comments) + { + cpp_buffer *pbuf = CPP_BUFFER (pfile); + long dummy; + U_CHAR *start = pbuf->buf + start_mark.position; + int len = pbuf->cur - start; + CPP_RESERVE(pfile, 1 + len); + CPP_PUTC_Q (pfile, c); + CPP_PUTS_Q (pfile, start, len); + pfile->lineno += newlines; + parse_clear_mark (&start_mark); + return CPP_COMMENT; + } + else if (CPP_TRADITIONAL (pfile)) + goto get_next; + else + { +#if 0 + /* This may not work if cpp_get_token is called recursively, + since many places look for horizontal space. */ + if (newlines) + { + /* Copy the newlines into the output buffer, in order to + avoid the pain of a #line every time a multiline comment + is seen. */ + CPP_RESERVE(pfile, newlines); + while (--newlines >= 0) + { + CPP_PUTC_Q (pfile, '\n'); + pfile->lineno++; + } + return CPP_VSPACE; + } +#endif + CPP_RESERVE(pfile, 1); + CPP_PUTC_Q (pfile, ' '); + return CPP_HSPACE; + } + if (opts->for_lint) { +#if 0 + U_CHAR *argbp; + int cmdlen, arglen; + char *lintcmd = get_lintcmd (ibp, limit, &argbp, &arglen, &cmdlen); + + if (lintcmd != NULL) { + /* I believe it is always safe to emit this newline: */ + obp[-1] = '\n'; + bcopy ("#pragma lint ", (char *) obp, 13); + obp += 13; + bcopy (lintcmd, (char *) obp, cmdlen); + obp += cmdlen; + + if (arglen != 0) { + *(obp++) = ' '; + bcopy (argbp, (char *) obp, arglen); + obp += arglen; + } + + /* OK, now bring us back to the state we were in before we entered + this branch. We need #line b/c the newline for the pragma + could fuck things up. */ + output_line_command (pfile, 0, same_file); + *(obp++) = ' '; /* just in case, if comments are copied thru */ + *(obp++) = '/'; + } +#endif + } + + case '#': +#if 0 + /* If this is expanding a macro definition, don't recognize + preprocessor directives. */ + if (ip->macro != 0) + goto randomchar; + /* If this is expand_into_temp_buffer, recognize them + only after an actual newline at this level, + not at the beginning of the input level. */ + if (ip->fname == 0 && beg_of_line == ip->buf) + goto randomchar; + if (ident_length) + goto specialchar; +#endif + + if (!pfile->only_seen_white) + goto randomchar; + if (handle_directive (pfile)) + return CPP_DIRECTIVE; + pfile->only_seen_white = 0; + return CPP_OTHER; + + case '\"': + case '\'': + /* A single quoted string is treated like a double -- some + programs (e.g., troff) are perverse this way */ +#if 0 + start_line = pfile->lineno; +#endif + old_written = CPP_WRITTEN (pfile); + string: + CPP_PUTC (pfile, c); + while (1) + { + int cc = GETC(); + if (cc == EOF) + { + if (CPP_IS_MACRO_BUFFER (CPP_BUFFER (pfile))) + { + /* try harder: this string crosses a macro expansion + boundary. This can happen naturally if -traditional. + Otherwise, only -D can make a macro with an unmatched + quote. */ + cpp_buffer *next_buf + = CPP_PREV_BUFFER (CPP_BUFFER (pfile)); + (*CPP_BUFFER (pfile)->cleanup) + (CPP_BUFFER (pfile), pfile); + CPP_BUFFER (pfile) = next_buf; + continue; + } +#if 0 + if (!CPP_TRADITIONAL (pfile)) + { + cpp_error_with_line (pfile, line_for_error (start_line), + "unterminated string or character constant"); + cpp_error_with_line (pfile, multiline_string_line, + "possible real start of unterminated constant"); + multiline_string_line = 0; + } +#endif + break; + } + CPP_PUTC (pfile, cc); + switch (cc) + { + case '\n': + /* Traditionally, end of line ends a string constant with + no error. So exit the loop and record the new line. */ + if (CPP_TRADITIONAL (pfile)) + goto while2end; +#if 0 + if (c == '\'') + { + cpp_error_with_line (pfile, line_for_error (start_line), + "unterminated character constant"); + goto while2end; + } + if (CPP_PEDANTIC (pfile) && multiline_string_line == 0) + { + cpp_pedwarn_with_line (pfile, + line_for_error (start_line), + "string constant runs past end of line"); + } + if (multiline_string_line == 0) + multiline_string_line = ip->lineno - 1; +#endif + break; + + case '\\': + cc = GETC(); + if (cc == '\n') + { + /* Backslash newline is replaced by nothing at all. */ + CPP_ADJUST_WRITTEN (pfile, -1); + pfile->lineno++; + } + else + { + /* ANSI stupidly requires that in \\ the second \ + is *not* prevented from combining with a newline. */ + NEWLINE_FIX1(cc); + if (cc != EOF) + CPP_PUTC (pfile, cc); + } + break; + + case '\"': + case '\'': + if (cc == c) + goto while2end; + break; + } + } + while2end: + pfile->lineno += count_newlines (pfile->token_buffer + old_written, + CPP_PWRITTEN (pfile)); + pfile->only_seen_white = 0; + return c == '\'' ? CPP_CHAR : CPP_STRING; + + case '$': + if (!opts->dollars_in_ident) + goto randomchar; + goto letter; + + case ':': + if (opts->cplusplus && PEEKC () == ':') + goto op2; + goto randomchar; + + case '&': + case '+': + case '|': + NEWLINE_FIX; + c2 = PEEKC (); + if (c2 == c || c2 == '=') + goto op2; + goto randomchar; + + case '*': + case '!': + case '%': + case '=': + case '^': + NEWLINE_FIX; + if (PEEKC () == '=') + goto op2; + goto randomchar; + + case '-': + NEWLINE_FIX; + c2 = PEEKC (); + if (c2 == '-' && opts->chill) + { + /* Chill style comment */ + if (opts->put_out_comments) + parse_set_mark (&start_mark, pfile); + FORWARD(1); /* Skip second '-'. */ + for (;;) + { + c = GETC (); + if (c == EOF) + break; + if (c == '\n') + { + /* Don't consider final '\n' to be part of comment. */ + FORWARD(-1); + break; + } + } + c = '-'; + goto return_comment; + } + if (c2 == '-' || c2 == '=' || c2 == '>') + goto op2; + goto randomchar; + + case '<': + if (pfile->parsing_include_directive) + { + for (;;) + { + CPP_PUTC (pfile, c); + if (c == '>') + break; + c = GETC (); + NEWLINE_FIX1 (c); + if (c == '\n' || c == EOF) + { + cpp_error (pfile, + "missing '>' in `#include <FILENAME>'"); + break; + } + } + return CPP_STRING; + } + /* else fall through */ + case '>': + NEWLINE_FIX; + c2 = PEEKC (); + if (c2 == '=') + goto op2; + if (c2 != c) + goto randomchar; + FORWARD(1); + CPP_RESERVE (pfile, 4); + CPP_PUTC (pfile, c); + CPP_PUTC (pfile, c2); + NEWLINE_FIX; + c3 = PEEKC (); + if (c3 == '=') + CPP_PUTC_Q (pfile, GETC ()); + CPP_NUL_TERMINATE_Q (pfile); + pfile->only_seen_white = 0; + return CPP_OTHER; + + case '@': + if (CPP_BUFFER (pfile)->has_escapes) + { + c = GETC (); + if (c == '-') + { + if (pfile->output_escapes) + CPP_PUTS (pfile, "@-", 2); + parse_name (pfile, GETC ()); + return CPP_NAME; + } + } + if (pfile->output_escapes) + { + CPP_PUTS (pfile, "@@", 2); + return CPP_OTHER; + } + goto randomchar; + + case '.': + NEWLINE_FIX; + c2 = PEEKC (); + if (isdigit(c2)) + { + CPP_RESERVE(pfile, 2); + CPP_PUTC_Q (pfile, '.'); + c = GETC (); + goto number; + } + /* FIXME - misses the case "..\\\n." */ + if (c2 == '.' && PEEKN(1) == '.') + { + CPP_RESERVE(pfile, 4); + CPP_PUTC_Q (pfile, '.'); + CPP_PUTC_Q (pfile, '.'); + CPP_PUTC_Q (pfile, '.'); + FORWARD (2); + CPP_NUL_TERMINATE_Q (pfile); + pfile->only_seen_white = 0; + return CPP_3DOTS; + } + goto randomchar; + + op2: + token = CPP_OTHER; + pfile->only_seen_white = 0; + op2any: + CPP_RESERVE(pfile, 3); + CPP_PUTC_Q (pfile, c); + CPP_PUTC_Q (pfile, GETC ()); + CPP_NUL_TERMINATE_Q (pfile); + return token; + + case 'L': + NEWLINE_FIX; + c2 = PEEKC (); + if ((c2 == '\'' || c2 == '\"') && !CPP_TRADITIONAL (pfile)) + { + CPP_PUTC (pfile, c); + c = GETC (); + goto string; + } + goto letter; + + case '0': case '1': case '2': case '3': case '4': + case '5': case '6': case '7': case '8': case '9': + number: + c2 = '.'; + for (;;) + { + CPP_RESERVE (pfile, 2); + CPP_PUTC_Q (pfile, c); + NEWLINE_FIX; + c = PEEKC (); + if (c == EOF) + break; + if (!is_idchar[c] && c != '.' + && ((c2 != 'e' && c2 != 'E') || (c != '+' && c != '-'))) + break; + FORWARD(1); + c2= c; + } + CPP_NUL_TERMINATE_Q (pfile); + pfile->only_seen_white = 0; + return CPP_NUMBER; + case 'b': case 'c': case 'd': case 'h': case 'o': + case 'B': case 'C': case 'D': case 'H': case 'O': + if (opts->chill && PEEKC () == '\'') + { + pfile->only_seen_white = 0; + CPP_RESERVE (pfile, 2); + CPP_PUTC_Q (pfile, c); + CPP_PUTC_Q (pfile, '\''); + FORWARD(1); + for (;;) + { + c = GETC(); + if (c == EOF) + goto chill_number_eof; + if (!is_idchar[c]) + { + if (c == '\\' && PEEKC() == '\n') + { + FORWARD(2); + continue; + } + break; + } + CPP_PUTC (pfile, c); + } + if (c == '\'') + { + CPP_RESERVE (pfile, 2); + CPP_PUTC_Q (pfile, c); + CPP_NUL_TERMINATE_Q (pfile); + return CPP_STRING; + } + else + { + FORWARD(-1); + chill_number_eof: + CPP_NUL_TERMINATE (pfile); + return CPP_NUMBER; + } + } + else + goto letter; + case '_': + case 'a': case 'e': case 'f': case 'g': case 'i': case 'j': + case 'k': case 'l': case 'm': case 'n': case 'p': case 'q': + case 'r': case 's': case 't': case 'u': case 'v': case 'w': + case 'x': case 'y': case 'z': + case 'A': case 'E': case 'F': case 'G': case 'I': case 'J': + case 'K': case 'M': case 'N': case 'P': case 'Q': case 'R': + case 'S': case 'T': case 'U': case 'V': case 'W': case 'X': + case 'Y': case 'Z': + letter: + { + HASHNODE *hp; + unsigned char *ident; + int before_name_written = CPP_WRITTEN (pfile); + int ident_len; + parse_name (pfile, c); + pfile->only_seen_white = 0; + if (pfile->no_macro_expand) + return CPP_NAME; + ident = pfile->token_buffer + before_name_written; + ident_len = CPP_PWRITTEN (pfile) - ident; + hp = cpp_lookup (pfile, ident, ident_len, -1); + if (!hp) + return CPP_NAME; + if (hp->type == T_DISABLED) + { + if (pfile->output_escapes) + { /* Return "@-IDENT", followed by '\0'. */ + int i; + CPP_RESERVE (pfile, 3); + ident = pfile->token_buffer + before_name_written; + CPP_ADJUST_WRITTEN (pfile, 2); + for (i = ident_len; i >= 0; i--) ident[i+2] = ident[i]; + ident[0] = '@'; + ident[1] = '-'; + } + return CPP_NAME; + } + + /* If macro wants an arglist, verify that a '(' follows. + first skip all whitespace, copying it to the output + after the macro name. Then, if there is no '(', + decide this is not a macro call and leave things that way. */ + if (hp->type == T_MACRO && hp->value.defn->nargs >= 0) + { + struct parse_marker macro_mark; + int is_macro_call; + while (CPP_IS_MACRO_BUFFER (CPP_BUFFER (pfile))) + { + cpp_buffer *next_buf; + cpp_skip_hspace (pfile); + if (PEEKC () != EOF) + break; + next_buf = CPP_PREV_BUFFER (CPP_BUFFER (pfile)); + (*CPP_BUFFER (pfile)->cleanup) (CPP_BUFFER (pfile), pfile); + CPP_BUFFER (pfile) = next_buf; + } + parse_set_mark (¯o_mark, pfile); + for (;;) + { + cpp_skip_hspace (pfile); + c = PEEKC (); + is_macro_call = c == '('; + if (c != '\n') + break; + FORWARD (1); + } + if (!is_macro_call) + parse_goto_mark (¯o_mark, pfile); + parse_clear_mark (¯o_mark); + if (!is_macro_call) + return CPP_NAME; + } + /* This is now known to be a macro call. */ + + /* it might not actually be a macro. */ + if (hp->type != T_MACRO) { + int xbuf_len; U_CHAR *xbuf; + CPP_SET_WRITTEN (pfile, before_name_written); + special_symbol (hp, pfile); + xbuf_len = CPP_WRITTEN (pfile) - before_name_written; + xbuf = (U_CHAR *) xmalloc (xbuf_len + 1); + CPP_SET_WRITTEN (pfile, before_name_written); + bcopy (CPP_PWRITTEN (pfile), xbuf, xbuf_len + 1); + push_macro_expansion (pfile, xbuf, xbuf_len, hp); + } + else + { + /* Expand the macro, reading arguments as needed, + and push the expansion on the input stack. */ + macroexpand (pfile, hp); + CPP_SET_WRITTEN (pfile, before_name_written); + } + + /* An extra space is added to the end of a macro expansion + to prevent accidental token pasting. We prefer to avoid + unneeded extra spaces (for the sake of cpp-using tools like + imake). Here we remove the space if it is safe to do so. */ + if (pfile->buffer->rlimit - pfile->buffer->cur >= 2 + && pfile->buffer->cur[-1] == ' ') + { + int c1 = pfile->buffer->rlimit[-2]; + int c2 = CPP_BUF_PEEK (CPP_PREV_BUFFER (CPP_BUFFER (pfile))); + if (c2 == EOF || ! unsafe_chars (c1, c2)) + pfile->buffer->rlimit--; + } + + goto get_next; + } + return CPP_NAME; + + case ' ': case '\t': case '\v': case '\r': + for (;;) + { + CPP_PUTC (pfile, c); + c = PEEKC (); + if (c == EOF || !is_hor_space[c]) + break; + FORWARD(1); + } + return CPP_HSPACE; + + case '\\': + c2 = PEEKC (); + if (c2 != '\n') + goto randomchar; + token = CPP_HSPACE; + goto op2any; + + case '\n': + CPP_PUTC (pfile, c); + if (pfile->only_seen_white == 0) + pfile->only_seen_white = 1; + pfile->lineno++; + output_line_command (pfile, 1, same_file); + return CPP_VSPACE; + + case '(': token = CPP_LPAREN; goto char1; + case ')': token = CPP_RPAREN; goto char1; + case '{': token = CPP_LBRACE; goto char1; + case '}': token = CPP_RBRACE; goto char1; + case ',': token = CPP_COMMA; goto char1; + case ';': token = CPP_SEMICOLON; goto char1; + + randomchar: + default: + token = CPP_OTHER; + char1: + pfile->only_seen_white = 0; + CPP_PUTC (pfile, c); + return token; + } + } +} + +/* Like cpp_get_token, but skip spaces and comments. */ +enum cpp_token +cpp_get_non_space_token (pfile) + cpp_reader *pfile; +{ + int old_written = CPP_WRITTEN (pfile); + for (;;) + { + enum cpp_token token = cpp_get_token (pfile); + if (token != CPP_COMMENT && token != CPP_POP + && token != CPP_HSPACE && token != CPP_VSPACE) + return token; + CPP_SET_WRITTEN (pfile, old_written); + } +} + +/* Parse an identifier starting with C. */ + +int +parse_name (pfile, c) + cpp_reader *pfile; int c; +{ + for (;;) + { + if (! is_idchar[c]) + { + if (c == '\\' && PEEKC() == '\n') + { + FORWARD(2); + continue; + } + FORWARD (-1); + break; + } + + CPP_RESERVE(pfile, 2); /* One more for final NUL. */ + CPP_PUTC_Q (pfile, c); + c = GETC(); + if (c == EOF) + break; + } + CPP_NUL_TERMINATE_Q (pfile); + return 1; +} + + +/* Maintain and search list of included files, for #import. */ + +/* Hash a file name for import_hash_table. */ + +static int +import_hash (f) + char *f; +{ + int val = 0; + + while (*f) val += *f++; + return (val%IMPORT_HASH_SIZE); +} + +/* Search for file FILENAME in import_hash_table. + Return -2 if found, either a matching name or a matching inode. + Otherwise, open the file and return a file descriptor if successful + or -1 if unsuccessful. */ + +static int +lookup_import (pfile, filename, searchptr) +cpp_reader *pfile; + char *filename; + struct file_name_list *searchptr; +{ + struct import_file *i; + int h; + int hashval; + struct stat sb; + int fd; + + hashval = import_hash (filename); + + /* Attempt to find file in list of already included files */ + i = pfile->import_hash_table[hashval]; + + while (i) { + if (!strcmp (filename, i->name)) + return -2; /* return found */ + i = i->next; + } + /* Open it and try a match on inode/dev */ + fd = open_include_file (filename, searchptr); + if (fd < 0) + return fd; + fstat (fd, &sb); + for (h = 0; h < IMPORT_HASH_SIZE; h++) { + i = pfile->import_hash_table[h]; + while (i) { + /* Compare the inode and the device. + Supposedly on some systems the inode is not a scalar. */ + if (!bcmp (&i->inode, &sb.st_ino, sizeof (sb.st_ino)) + && i->dev == sb.st_dev) { + close (fd); + return -2; /* return found */ + } + i = i->next; + } + } + return fd; /* Not found, return open file */ +} + +/* Add the file FNAME, open on descriptor FD, to import_hash_table. */ + +static void +add_import (pfile, fd, fname) + cpp_reader *pfile; + int fd; + char *fname; +{ + struct import_file *i; + int hashval; + struct stat sb; + + hashval = import_hash (fname); + fstat (fd, &sb); + i = (struct import_file *)xmalloc (sizeof (struct import_file)); + i->name = (char *)xmalloc (strlen (fname)+1); + strcpy (i->name, fname); + bcopy (&sb.st_ino, &i->inode, sizeof (sb.st_ino)); + i->dev = sb.st_dev; + i->next = pfile->import_hash_table[hashval]; + pfile->import_hash_table[hashval] = i; +} + +/* The file_name_map structure holds a mapping of file names for a + particular directory. This mapping is read from the file named + FILE_NAME_MAP_FILE in that directory. Such a file can be used to + map filenames on a file system with severe filename restrictions, + such as DOS. The format of the file name map file is just a series + of lines with two tokens on each line. The first token is the name + to map, and the second token is the actual name to use. */ + +struct file_name_map +{ + struct file_name_map *map_next; + char *map_from; + char *map_to; +}; + +#define FILE_NAME_MAP_FILE "header.gcc" + +/* Read a space delimited string of unlimited length from a stdio + file. */ + +static char * +read_filename_string (ch, f) + int ch; + FILE *f; +{ + char *alloc, *set; + int len; + + len = 20; + set = alloc = xmalloc (len + 1); + if (! is_space[ch]) + { + *set++ = ch; + while ((ch = getc (f)) != EOF && ! is_space[ch]) + { + if (set - alloc == len) + { + len *= 2; + alloc = xrealloc (alloc, len + 1); + set = alloc + len / 2; + } + *set++ = ch; + } + } + *set = '\0'; + ungetc (ch, f); + return alloc; +} + +/* Read the file name map file for DIRNAME. */ + +static struct file_name_map * +read_name_map (dirname) + char *dirname; +{ + /* This structure holds a linked list of file name maps, one per + directory. */ + struct file_name_map_list + { + struct file_name_map_list *map_list_next; + char *map_list_name; + struct file_name_map *map_list_map; + }; + static struct file_name_map_list *map_list; + register struct file_name_map_list *map_list_ptr; + char *name; + FILE *f; + + for (map_list_ptr = map_list; map_list_ptr; + map_list_ptr = map_list_ptr->map_list_next) + if (! strcmp (map_list_ptr->map_list_name, dirname)) + return map_list_ptr->map_list_map; + + map_list_ptr = ((struct file_name_map_list *) + xmalloc (sizeof (struct file_name_map_list))); + map_list_ptr->map_list_name = savestring (dirname); + map_list_ptr->map_list_map = NULL; + + name = (char *) alloca (strlen (dirname) + strlen (FILE_NAME_MAP_FILE) + 2); + strcpy (name, dirname); + if (*dirname) + strcat (name, "/"); + strcat (name, FILE_NAME_MAP_FILE); + f = fopen (name, "r"); + if (!f) + map_list_ptr->map_list_map = NULL; + else + { + int ch; + int dirlen = strlen (dirname); + + while ((ch = getc (f)) != EOF) + { + char *from, *to; + struct file_name_map *ptr; + + if (is_space[ch]) + continue; + from = read_filename_string (ch, f); + while ((ch = getc (f)) != EOF && is_hor_space[ch]) + ; + to = read_filename_string (ch, f); + + ptr = ((struct file_name_map *) + xmalloc (sizeof (struct file_name_map))); + ptr->map_from = from; + + /* Make the real filename absolute. */ + if (*to == '/') + ptr->map_to = to; + else + { + ptr->map_to = xmalloc (dirlen + strlen (to) + 2); + strcpy (ptr->map_to, dirname); + ptr->map_to[dirlen] = '/'; + strcpy (ptr->map_to + dirlen + 1, to); + free (to); + } + + ptr->map_next = map_list_ptr->map_list_map; + map_list_ptr->map_list_map = ptr; + + while ((ch = getc (f)) != '\n') + if (ch == EOF) + break; + } + fclose (f); + } + + map_list_ptr->map_list_next = map_list; + map_list = map_list_ptr; + + return map_list_ptr->map_list_map; +} + +/* Try to open include file FILENAME. SEARCHPTR is the directory + being tried from the include file search path. This function maps + filenames on file systems based on information read by + read_name_map. */ + +static int +open_include_file (filename, searchptr) + char *filename; + struct file_name_list *searchptr; +{ + register struct file_name_map *map; + register char *from; + char *p, *dir; + + if (searchptr && ! searchptr->got_name_map) + { + searchptr->name_map = read_name_map (searchptr->fname + ? searchptr->fname : "."); + searchptr->got_name_map = 1; + } + + /* First check the mapping for the directory we are using. */ + if (searchptr && searchptr->name_map) + { + from = filename; + if (searchptr->fname) + from += strlen (searchptr->fname) + 1; + for (map = searchptr->name_map; map; map = map->map_next) + { + if (! strcmp (map->map_from, from)) + { + /* Found a match. */ + return open (map->map_to, O_RDONLY, 0666); + } + } + } + + /* Try to find a mapping file for the particular directory we are + looking in. Thus #include <sys/types.h> will look up sys/types.h + in /usr/include/header.gcc and look up types.h in + /usr/include/sys/header.gcc. */ + p = rindex (filename, '/'); + if (! p) + p = filename; + if (searchptr + && searchptr->fname + && strlen (searchptr->fname) == p - filename + && ! strncmp (searchptr->fname, filename, p - filename)) + { + /* FILENAME is in SEARCHPTR, which we've already checked. */ + return open (filename, O_RDONLY, 0666); + } + + if (p == filename) + { + dir = "."; + from = filename; + } + else + { + dir = (char *) alloca (p - filename + 1); + bcopy (filename, dir, p - filename); + dir[p - filename] = '\0'; + from = p + 1; + } + for (map = read_name_map (dir); map; map = map->map_next) + if (! strcmp (map->map_from, from)) + return open (map->map_to, O_RDONLY, 0666); + + return open (filename, O_RDONLY, 0666); +} + +/* Process the contents of include file FNAME, already open on descriptor F, + with output to OP. + SYSTEM_HEADER_P is 1 if this file resides in any one of the known + "system" include directories (as decided by the `is_system_include' + function above). + DIRPTR is the link in the dir path through which this file was found, + or 0 if the file name was absolute. + Return 1 on success, 0 on failure. */ + +static int +finclude (pfile, f, fname, system_header_p, dirptr) + cpp_reader *pfile; + int f; + char *fname; + int system_header_p; + struct file_name_list *dirptr; +{ + int st_mode; + long st_size; + long i; + int length; + cpp_buffer *fp; /* For input stack frame */ + int missing_newline = 0; + +#if 0 + CHECK_DEPTH (return 0;); +#endif + + if (file_size_and_mode (f, &st_mode, &st_size) < 0) + { + cpp_perror_with_name (pfile, fname); + close (f); + return 0; + } + + fp = cpp_push_buffer (pfile, NULL, 0); + fp->nominal_fname = fp->fname = fname; +#if 0 + fp->length = 0; +#endif + fp->dir = dirptr; + fp->system_header_p = system_header_p; + fp->lineno = 1; + fp->colno = 1; + fp->cleanup = file_cleanup; + + if (S_ISREG (st_mode)) { + fp->buf = (U_CHAR *) xmalloc (st_size + 2); + fp->alimit = fp->buf + st_size + 2; + fp->cur = fp->buf; + + /* Read the file contents, knowing that st_size is an upper bound + on the number of bytes we can read. */ + length = safe_read (f, fp->buf, st_size); + fp->rlimit = fp->buf + length; + if (length < 0) goto nope; + } + else if (S_ISDIR (st_mode)) { + cpp_error (pfile, "directory `%s' specified in #include", fname); + close (f); + return 0; + } else { + /* Cannot count its file size before reading. + First read the entire file into heap and + copy them into buffer on stack. */ + + int bsize = 2000; + + st_size = 0; + fp->buf = (U_CHAR *) xmalloc (bsize + 2); + + for (;;) { + i = safe_read (f, fp->buf + st_size, bsize - st_size); + if (i < 0) + goto nope; /* error! */ + st_size += i; + if (st_size != bsize) + break; /* End of file */ + bsize *= 2; + fp->buf = (U_CHAR *) xrealloc (fp->buf, bsize + 2); + } + length = st_size; + } + + if ((length > 0 && fp->buf[length - 1] != '\n') + /* Backslash-newline at end is not good enough. */ + || (length > 1 && fp->buf[length - 2] == '\\')) { + fp->buf[length++] = '\n'; +#if 0 + missing_newline = 1; +#endif + } + fp->buf[length] = '\0'; + fp->rlimit = fp->buf + length; + + /* Close descriptor now, so nesting does not use lots of descriptors. */ + close (f); + + /* Must do this before calling trigraph_pcp, so that the correct file name + will be printed in warning messages. */ + + pfile->input_stack_listing_current = 0; + +#if 0 + if (!no_trigraphs) + trigraph_pcp (fp); +#endif + +#if 0 + rescan (op, 0); + + if (missing_newline) + fp->lineno--; + + if (CPP_PEDANTIC (pfile) && missing_newline) + pedwarn ("file does not end in newline"); + + indepth--; + input_file_stack_tick++; + free (fp->buf); +#endif + return 1; + + nope: + + cpp_perror_with_name (pfile, fname); + close (f); + free (fp->buf); + return 1; +} + +int +push_parse_file (pfile, fname) + cpp_reader *pfile; + char *fname; +{ + struct cpp_options *opts = CPP_OPTIONS (pfile); + struct cpp_pending *pend; + char *p; + int f; + + /* The code looks at the defaults through this pointer, rather than through + the constant structure above. This pointer gets changed if an environment + variable specifies other defaults. */ + struct default_include *include_defaults = include_defaults_array; + + /* Add dirs from CPATH after dirs from -I. */ + /* There seems to be confusion about what CPATH should do, + so for the moment it is not documented. */ + /* Some people say that CPATH should replace the standard include dirs, + but that seems pointless: it comes before them, so it overrides them + anyway. */ + p = (char *) getenv ("CPATH"); + if (p != 0 && ! opts->no_standard_includes) + path_include (pfile, p); + + /* Now that dollars_in_ident is known, initialize is_idchar. */ + initialize_char_syntax (opts); + +#if 0 + /* Do partial setup of input buffer for the sake of generating + early #line directives (when -g is in effect). */ + + fp = &instack[++indepth]; + if (in_fname == NULL) + in_fname = ""; + fp->nominal_fname = fp->fname = in_fname; + fp->lineno = 0; +#endif + + /* Install __LINE__, etc. Must follow initialize_char_syntax + and option processing. */ + initialize_builtins (pfile); + + /* Do standard #defines and assertions + that identify system and machine type. */ + + if (!opts->inhibit_predefs) { + char *p = (char *) alloca (strlen (predefs) + 1); + strcpy (p, predefs); + while (*p) { + char *q; + while (*p == ' ' || *p == '\t') + p++; + /* Handle -D options. */ + if (p[0] == '-' && p[1] == 'D') { + q = &p[2]; + while (*p && *p != ' ' && *p != '\t') + p++; + if (*p != 0) + *p++= 0; + if (opts->debug_output) + output_line_command (pfile, 0, same_file); + make_definition (pfile, q); + while (*p == ' ' || *p == '\t') + p++; + } else if (p[0] == '-' && p[1] == 'A') { + /* Handle -A options (assertions). */ + char *assertion; + char *past_name; + char *value; + char *past_value; + char *termination; + int save_char; + + assertion = &p[2]; + past_name = assertion; + /* Locate end of name. */ + while (*past_name && *past_name != ' ' + && *past_name != '\t' && *past_name != '(') + past_name++; + /* Locate `(' at start of value. */ + value = past_name; + while (*value && (*value == ' ' || *value == '\t')) + value++; + if (*value++ != '(') + abort (); + while (*value && (*value == ' ' || *value == '\t')) + value++; + past_value = value; + /* Locate end of value. */ + while (*past_value && *past_value != ' ' + && *past_value != '\t' && *past_value != ')') + past_value++; + termination = past_value; + while (*termination && (*termination == ' ' || *termination == '\t')) + termination++; + if (*termination++ != ')') + abort (); + if (*termination && *termination != ' ' && *termination != '\t') + abort (); + /* Temporarily null-terminate the value. */ + save_char = *termination; + *termination = '\0'; + /* Install the assertion. */ + make_assertion (pfile, "-A", assertion); + *termination = (char) save_char; + p = termination; + while (*p == ' ' || *p == '\t') + p++; + } else { + abort (); + } + } + } + + /* Now handle the command line options. */ + + /* Do -U's, -D's and -A's in the order they were seen. */ + /* First reverse the list. */ + { + struct cpp_pending *prev = 0, *next; + for (pend = opts->pending; pend; pend = next) + { + next = pend->next; + pend->next = prev; + prev = pend; + } + opts->pending = prev; + + for (pend = opts->pending; pend; pend = pend->next) + { + if (pend->cmd != NULL && pend->cmd[0] == '-') + { + switch (pend->cmd[1]) + { + case 'U': + if (opts->debug_output) + output_line_command (pfile, 0, same_file); + do_undef (pfile, NULL, pend->arg, pend->arg + strlen (pend->arg)); + break; + case 'D': + if (opts->debug_output) + output_line_command (pfile, 0, same_file); + make_definition (pfile, pend->arg); + break; + case 'A': + make_assertion (pfile, "-A", pend->arg); + break; + } + } + } + opts->pending = NULL; + } + + opts->done_initializing = 1; + + { /* read the appropriate environment variable and if it exists + replace include_defaults with the listed path. */ + char *epath = 0; + switch ((opts->objc << 1) + opts->cplusplus) + { + case 0: + epath = getenv ("C_INCLUDE_PATH"); + break; + case 1: + epath = getenv ("CPLUS_INCLUDE_PATH"); + break; + case 2: + epath = getenv ("OBJC_INCLUDE_PATH"); + break; + case 3: + epath = getenv ("OBJCPLUS_INCLUDE_PATH"); + break; + } + /* If the environment var for this language is set, + add to the default list of include directories. */ + if (epath) { + char *nstore = (char *) alloca (strlen (epath) + 2); + int num_dirs; + char *startp, *endp; + + for (num_dirs = 1, startp = epath; *startp; startp++) + if (*startp == PATH_SEPARATOR) + num_dirs++; + include_defaults + = (struct default_include *) xmalloc ((num_dirs + * sizeof (struct default_include)) + + sizeof (include_defaults_array)); + startp = endp = epath; + num_dirs = 0; + while (1) { + /* Handle cases like c:/usr/lib:d:/gcc/lib */ + if ((*endp == PATH_SEPARATOR) + || *endp == 0) { + strncpy (nstore, startp, endp-startp); + if (endp == startp) + strcpy (nstore, "."); + else + nstore[endp-startp] = '\0'; + + include_defaults[num_dirs].fname = savestring (nstore); + include_defaults[num_dirs].cplusplus = opts->cplusplus; + include_defaults[num_dirs].cxx_aware = 1; + num_dirs++; + if (*endp == '\0') + break; + endp = startp = endp + 1; + } else + endp++; + } + /* Put the usual defaults back in at the end. */ + bcopy (include_defaults_array, &include_defaults[num_dirs], + sizeof (include_defaults_array)); + } + } + + append_include_chain (pfile, opts->before_system, opts->last_before_system); + opts->first_system_include = opts->before_system; + + /* Unless -fnostdinc, + tack on the standard include file dirs to the specified list */ + if (!opts->no_standard_includes) { + struct default_include *p = include_defaults; + char *specd_prefix = opts->include_prefix; + char *default_prefix = savestring (GCC_INCLUDE_DIR); + int default_len = 0; + /* Remove the `include' from /usr/local/lib/gcc.../include. */ + if (!strcmp (default_prefix + strlen (default_prefix) - 8, "/include")) { + default_len = strlen (default_prefix) - 7; + default_prefix[default_len] = 0; + } + /* Search "translated" versions of GNU directories. + These have /usr/local/lib/gcc... replaced by specd_prefix. */ + if (specd_prefix != 0 && default_len != 0) + for (p = include_defaults; p->fname; p++) { + /* Some standard dirs are only for C++. */ + if (!p->cplusplus + || (opts->cplusplus && !opts->no_standard_cplusplus_includes)) { + /* Does this dir start with the prefix? */ + if (!strncmp (p->fname, default_prefix, default_len)) { + /* Yes; change prefix and add to search list. */ + struct file_name_list *new + = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); + int this_len = strlen (specd_prefix) + strlen (p->fname) - default_len; + char *str = (char *) xmalloc (this_len + 1); + strcpy (str, specd_prefix); + strcat (str, p->fname + default_len); + new->fname = str; + new->control_macro = 0; + new->c_system_include_path = !p->cxx_aware; + new->got_name_map = 0; + append_include_chain (pfile, new, new); + if (opts->first_system_include == 0) + opts->first_system_include = new; + } + } + } + /* Search ordinary names for GNU include directories. */ + for (p = include_defaults; p->fname; p++) { + /* Some standard dirs are only for C++. */ + if (!p->cplusplus + || (opts->cplusplus && !opts->no_standard_cplusplus_includes)) { + struct file_name_list *new + = (struct file_name_list *) xmalloc (sizeof (struct file_name_list)); + new->control_macro = 0; + new->c_system_include_path = !p->cxx_aware; + new->fname = p->fname; + new->got_name_map = 0; + append_include_chain (pfile, new, new); + if (opts->first_system_include == 0) + opts->first_system_include = new; + } + } + } + + /* Tack the after_include chain at the end of the include chain. */ + append_include_chain (pfile, opts->after_include, opts->last_after_include); + if (opts->first_system_include == 0) + opts->first_system_include = opts->after_include; + + /* With -v, print the list of dirs to search. */ + if (opts->verbose) { + struct file_name_list *p; + fprintf (stderr, "#include \"...\" search starts here:\n"); + for (p = opts->include; p; p = p->next) { + if (p == opts->first_bracket_include) + fprintf (stderr, "#include <...> search starts here:\n"); + fprintf (stderr, " %s\n", p->fname); + } + fprintf (stderr, "End of search list.\n"); + } + + /* Scan the -imacros files before the main input. + Much like #including them, but with no_output set + so that only their macro definitions matter. */ + + opts->no_output++; pfile->no_record_file++; + for (pend = opts->pending; pend; pend = pend->next) + { + if (pend->cmd != NULL && strcmp (pend->cmd, "-imacros") == 0) + { + int fd = open (pend->arg, O_RDONLY, 0666); + if (fd < 0) + { + cpp_perror_with_name (pfile, pend->arg); + return FAILURE_EXIT_CODE; + } + finclude (pfile, fd, pend->arg, 0, NULL_PTR); + cpp_scan_buffer (pfile); + } + } + opts->no_output--; pfile->no_record_file--; + + /* Copy the entire contents of the main input file into + the stacked input buffer previously allocated for it. */ + if (fname == NULL || *fname == 0) { + fname = ""; + f = 0; + } else if ((f = open (fname, O_RDONLY, 0666)) < 0) + cpp_pfatal_with_name (pfile, fname); + + /* -MG doesn't select the form of output and must be specified with one of + -M or -MM. -MG doesn't make sense with -MD or -MMD since they don't + inhibit compilation. */ + if (opts->print_deps_missing_files + && (opts->print_deps == 0 || !opts->no_output)) + fatal (pfile, "-MG must be specified with one of -M or -MM"); + + /* Either of two environment variables can specify output of deps. + Its value is either "OUTPUT_FILE" or "OUTPUT_FILE DEPS_TARGET", + where OUTPUT_FILE is the file to write deps info to + and DEPS_TARGET is the target to mention in the deps. */ + + if (opts->print_deps == 0 + && (getenv ("SUNPRO_DEPENDENCIES") != 0 + || getenv ("DEPENDENCIES_OUTPUT") != 0)) { + char *spec = getenv ("DEPENDENCIES_OUTPUT"); + char *s; + char *output_file; + + if (spec == 0) + { + spec = getenv ("SUNPRO_DEPENDENCIES"); + opts->print_deps = 2; + } + else + opts->print_deps = 1; + + s = spec; + /* Find the space before the DEPS_TARGET, if there is one. */ + /* This should use index. (mrs) */ + while (*s != 0 && *s != ' ') s++; + if (*s != 0) + { + opts->deps_target = s + 1; + output_file = (char *) xmalloc (s - spec + 1); + bcopy (spec, output_file, s - spec); + output_file[s - spec] = 0; + } + else + { + opts->deps_target = 0; + output_file = spec; + } + + opts->deps_file = output_file; + opts->print_deps_append = 1; + } + + /* For -M, print the expected object file name + as the target of this Make-rule. */ + if (opts->print_deps) + { + pfile->deps_allocated_size = 200; + pfile->deps_buffer = (char *) xmalloc (pfile->deps_allocated_size); + pfile->deps_buffer[0] = 0; + pfile->deps_size = 0; + pfile->deps_column = 0; + + if (opts->deps_target) + deps_output (pfile, opts->deps_target, ':'); + else if (*opts->in_fname == 0) + deps_output (pfile, "-", ':'); + else + { + char *p, *q; + int len; + + /* Discard all directory prefixes from filename. */ + if ((q = rindex (opts->in_fname, '/')) != NULL +#ifdef DIR_SEPARATOR + && (q = rindex (opts->in_fname, DIR_SEPARATOR)) != NULL +#endif + ) + ++q; + else + q = opts->in_fname; + + /* Copy remainder to mungable area. */ + p = (char *) alloca (strlen(q) + 8); + strcpy (p, q); + + /* Output P, but remove known suffixes. */ + len = strlen (p); + q = p + len; + if (len >= 2 + && p[len - 2] == '.' + && index("cCsSm", p[len - 1])) + q = p + (len - 2); + else if (len >= 3 + && p[len - 3] == '.' + && p[len - 2] == 'c' + && p[len - 1] == 'c') + q = p + (len - 3); + else if (len >= 4 + && p[len - 4] == '.' + && p[len - 3] == 'c' + && p[len - 2] == 'x' + && p[len - 1] == 'x') + q = p + (len - 4); + else if (len >= 4 + && p[len - 4] == '.' + && p[len - 3] == 'c' + && p[len - 2] == 'p' + && p[len - 1] == 'p') + q = p + (len - 4); + + /* Supply our own suffix. */ +#ifndef VMS + strcpy (q, ".o"); +#else + strcpy (q, ".obj"); +#endif + + deps_output (pfile, p, ':'); + deps_output (pfile, opts->in_fname, ' '); + } + } + +#if 0 + /* Make sure data ends with a newline. And put a null after it. */ + + if ((fp->length > 0 && fp->buf[fp->length - 1] != '\n') + /* Backslash-newline at end is not good enough. */ + || (fp->length > 1 && fp->buf[fp->length - 2] == '\\')) { + fp->buf[fp->length++] = '\n'; + missing_newline = 1; + } + fp->buf[fp->length] = '\0'; + + /* Unless inhibited, convert trigraphs in the input. */ + + if (!no_trigraphs) + trigraph_pcp (fp); +#endif + + /* Scan the -include files before the main input. */ + + pfile->no_record_file++; + for (pend = opts->pending; pend; pend = pend->next) + { + if (pend->cmd != NULL && strcmp (pend->cmd, "-include") == 0) + { + int fd = open (pend->arg, O_RDONLY, 0666); + if (fd < 0) + { + cpp_perror_with_name (pfile, pend->arg); + return FAILURE_EXIT_CODE; + } + finclude (pfile, fd, pend->arg, 0, NULL_PTR); + cpp_scan_buffer (pfile); + } + } + pfile->no_record_file--; + + /* Free the pending list. */ + for (pend = opts->pending; pend; ) + { + struct cpp_pending *next = pend->next; + free (pend); + pend = next; + } + opts->pending = NULL; + +#if 0 + /* Scan the input, processing macros and directives. */ + + rescan (&outbuf, 0); + + if (missing_newline) + fp->lineno--; + + if (CPP_PEDANTIC (pfile) && missing_newline) + pedwarn ("file does not end in newline"); + +#endif + if (finclude (pfile, f, fname, 0, 0)) + output_line_command (pfile, 0, same_file); + return SUCCESS_EXIT_CODE; +} + +void +init_parse_file (pfile) + cpp_reader *pfile; +{ + bzero (pfile, sizeof (cpp_reader)); + pfile->get_token = cpp_get_token; + + pfile->token_buffer_size = 200; + pfile->token_buffer = (char*)xmalloc (pfile->token_buffer_size); + CPP_SET_WRITTEN (pfile, 0); + + pfile->system_include_depth = 0; + pfile->dont_repeat_files = 0; + pfile->all_include_files = 0; + pfile->max_include_len = 0; + pfile->timebuf = NULL; + pfile->only_seen_white = 1; + pfile->buffer = CPP_NULL_BUFFER(pfile); +} + +static void +push_pending (pfile, cmd, arg) + cpp_reader *pfile; + char *cmd; + char *arg; +{ + struct cpp_pending *pend + = (struct cpp_pending*)xmalloc (sizeof (struct cpp_pending)); + pend->cmd = cmd; + pend->arg = arg; + pend->next = CPP_OPTIONS (pfile)->pending; + CPP_OPTIONS (pfile)->pending = pend; +} + +/* Handle command-line options in (argc, argv). + Can be called multiple times, to handle multiple sets of options. + Returns if an unrecognized option is seen. + Returns number of handled arguments. */ + +int +cpp_handle_options (pfile, argc, argv) + cpp_reader *pfile; + int argc; + char **argv; +{ + int i; + struct cpp_options *opts = CPP_OPTIONS (pfile); + for (i = 0; i < argc; i++) { + if (argv[i][0] != '-') { + if (opts->out_fname != NULL) + fatal ("Usage: %s [switches] input output", argv[0]); + else if (opts->in_fname != NULL) + opts->out_fname = argv[i]; + else + opts->in_fname = argv[i]; + } else { + switch (argv[i][1]) { + + case 'i': + if (!strcmp (argv[i], "-include") + || !strcmp (argv[i], "-imacros")) { + if (i + 1 == argc) + fatal ("Filename missing after `%s' option", argv[i]); + else + push_pending (pfile, argv[i], argv[i+1]), i++; + } + if (!strcmp (argv[i], "-iprefix")) { + if (i + 1 == argc) + fatal ("Filename missing after `-iprefix' option"); + else + opts->include_prefix = argv[++i]; + } + if (!strcmp (argv[i], "-ifoutput")) { + opts->output_conditionals = 1; + } + if (!strcmp (argv[i], "-isystem")) { + struct file_name_list *dirtmp; + + if (i + 1 == argc) + fatal ("Filename missing after `-isystem' option"); + + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 1; + dirtmp->fname = (char *) xmalloc (strlen (argv[i+1]) + 1); + strcpy (dirtmp->fname, argv[++i]); + dirtmp->got_name_map = 0; + + if (opts->before_system == 0) + opts->before_system = dirtmp; + else + opts->last_before_system->next = dirtmp; + opts->last_before_system = dirtmp; /* Tail follows the last one */ + } + /* Add directory to end of path for includes, + with the default prefix at the front of its name. */ + if (!strcmp (argv[i], "-iwithprefix")) { + struct file_name_list *dirtmp; + char *prefix; + + if (opts->include_prefix != 0) + prefix = opts->include_prefix; + else { + prefix = savestring (GCC_INCLUDE_DIR); + /* Remove the `include' from /usr/local/lib/gcc.../include. */ + if (!strcmp (prefix + strlen (prefix) - 8, "/include")) + prefix[strlen (prefix) - 7] = 0; + } + + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; /* New one goes on the end */ + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 0; + if (i + 1 == argc) + fatal ("Directory name missing after `-iwithprefix' option"); + + dirtmp->fname = (char *) xmalloc (strlen (argv[i+1]) + + strlen (prefix) + 1); + strcpy (dirtmp->fname, prefix); + strcat (dirtmp->fname, argv[++i]); + dirtmp->got_name_map = 0; + + if (opts->after_include == 0) + opts->after_include = dirtmp; + else + opts->last_after_include->next = dirtmp; + opts->last_after_include = dirtmp; /* Tail follows the last one */ + } + /* Add directory to main path for includes, + with the default prefix at the front of its name. */ + if (!strcmp (argv[i], "-iwithprefixbefore")) { + struct file_name_list *dirtmp; + char *prefix; + + if (opts->include_prefix != 0) + prefix = opts->include_prefix; + else { + prefix = savestring (GCC_INCLUDE_DIR); + /* Remove the `include' from /usr/local/lib/gcc.../include. */ + if (!strcmp (prefix + strlen (prefix) - 8, "/include")) + prefix[strlen (prefix) - 7] = 0; + } + + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; /* New one goes on the end */ + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 0; + if (i + 1 == argc) + fatal ("Directory name missing after `-iwithprefixbefore' option"); + + dirtmp->fname = (char *) xmalloc (strlen (argv[i+1]) + + strlen (prefix) + 1); + strcpy (dirtmp->fname, prefix); + strcat (dirtmp->fname, argv[++i]); + dirtmp->got_name_map = 0; + + append_include_chain (pfile, dirtmp, dirtmp); + } + /* Add directory to end of path for includes. */ + if (!strcmp (argv[i], "-idirafter")) { + struct file_name_list *dirtmp; + + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; /* New one goes on the end */ + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 0; + if (i + 1 == argc) + fatal ("Directory name missing after `-idirafter' option"); + else + dirtmp->fname = argv[++i]; + dirtmp->got_name_map = 0; + + if (opts->after_include == 0) + opts->after_include = dirtmp; + else + opts->last_after_include->next = dirtmp; + opts->last_after_include = dirtmp; /* Tail follows the last one */ + } + break; + + case 'o': + if (opts->out_fname != NULL) + fatal ("Output filename specified twice"); + if (i + 1 == argc) + fatal ("Filename missing after -o option"); + opts->out_fname = argv[++i]; + if (!strcmp (opts->out_fname, "-")) + opts->out_fname = ""; + break; + + case 'p': + if (!strcmp (argv[i], "-pedantic")) + CPP_PEDANTIC (pfile) = 1; + else if (!strcmp (argv[i], "-pedantic-errors")) { + CPP_PEDANTIC (pfile) = 1; + opts->pedantic_errors = 1; + } +#if 0 + else if (!strcmp (argv[i], "-pcp")) { + char *pcp_fname = argv[++i]; + pcp_outfile = + ((pcp_fname[0] != '-' || pcp_fname[1] != '\0') + ? fopen (pcp_fname, "w") + : fdopen (dup (fileno (stdout)), "w")); + if (pcp_outfile == 0) + cpp_pfatal_with_name (pfile, pcp_fname); + no_precomp = 1; + } +#endif + break; + + case 't': + if (!strcmp (argv[i], "-traditional")) { + opts->traditional = 1; + if (opts->dollars_in_ident > 0) + opts->dollars_in_ident = 1; + } else if (!strcmp (argv[i], "-trigraphs")) { + if (!opts->chill) + opts->no_trigraphs = 0; + } + break; + + case 'l': + if (! strcmp (argv[i], "-lang-c")) + opts->cplusplus = 0, opts->cplusplus_comments = 0, opts->objc = 0; + if (! strcmp (argv[i], "-lang-c++")) + opts->cplusplus = 1, opts->cplusplus_comments = 1, opts->objc = 0; + if (! strcmp (argv[i], "-lang-c-c++-comments")) + opts->cplusplus = 0, opts->cplusplus_comments = 1, opts->objc = 0; + if (! strcmp (argv[i], "-lang-objc")) + opts->objc = 1, opts->cplusplus = 0, opts->cplusplus_comments = 1; + if (! strcmp (argv[i], "-lang-objc++")) + opts->objc = 1, opts->cplusplus = 1, opts->cplusplus_comments = 1; + if (! strcmp (argv[i], "-lang-asm")) + opts->lang_asm = 1; + if (! strcmp (argv[i], "-lint")) + opts->for_lint = 1; + if (! strcmp (argv[i], "-lang-chill")) + opts->objc = 0, opts->cplusplus = 0, opts->chill = 1, + opts->traditional = 1, opts->no_trigraphs = 1; + break; + + case '+': + opts->cplusplus = 1, opts->cplusplus_comments = 1; + break; + + case 'w': + opts->inhibit_warnings = 1; + break; + + case 'W': + if (!strcmp (argv[i], "-Wtrigraphs")) + opts->warn_trigraphs = 1; + else if (!strcmp (argv[i], "-Wno-trigraphs")) + opts->warn_trigraphs = 0; + else if (!strcmp (argv[i], "-Wcomment")) + opts->warn_comments = 1; + else if (!strcmp (argv[i], "-Wno-comment")) + opts->warn_comments = 0; + else if (!strcmp (argv[i], "-Wcomments")) + opts->warn_comments = 1; + else if (!strcmp (argv[i], "-Wno-comments")) + opts->warn_comments = 0; + else if (!strcmp (argv[i], "-Wtraditional")) + opts->warn_stringify = 1; + else if (!strcmp (argv[i], "-Wno-traditional")) + opts->warn_stringify = 0; + else if (!strcmp (argv[i], "-Wimport")) + opts->warn_import = 1; + else if (!strcmp (argv[i], "-Wno-import")) + opts->warn_import = 0; + else if (!strcmp (argv[i], "-Werror")) + opts->warnings_are_errors = 1; + else if (!strcmp (argv[i], "-Wno-error")) + opts->warnings_are_errors = 0; + else if (!strcmp (argv[i], "-Wall")) + { + opts->warn_trigraphs = 1; + opts->warn_comments = 1; + } + break; + + case 'M': + /* The style of the choices here is a bit mixed. + The chosen scheme is a hybrid of keeping all options in one string + and specifying each option in a separate argument: + -M|-MM|-MD file|-MMD file [-MG]. An alternative is: + -M|-MM|-MD file|-MMD file|-MG|-MMG; or more concisely: + -M[M][G][D file]. This is awkward to handle in specs, and is not + as extensible. */ + /* ??? -MG must be specified in addition to one of -M or -MM. + This can be relaxed in the future without breaking anything. + The converse isn't true. */ + + /* -MG isn't valid with -MD or -MMD. This is checked for later. */ + if (!strcmp (argv[i], "-MG")) + { + opts->print_deps_missing_files = 1; + break; + } + if (!strcmp (argv[i], "-M")) + opts->print_deps = 2; + else if (!strcmp (argv[i], "-MM")) + opts->print_deps = 1; + else if (!strcmp (argv[i], "-MD")) + opts->print_deps = 2; + else if (!strcmp (argv[i], "-MMD")) + opts->print_deps = 1; + /* For -MD and -MMD options, write deps on file named by next arg. */ + if (!strcmp (argv[i], "-MD") || !strcmp (argv[i], "-MMD")) + { + if (i+1 == argc) + fatal ("Filename missing after %s option", argv[i]); + opts->deps_file = argv[++i]; + } + else + { + /* For -M and -MM, write deps on standard output + and suppress the usual output. */ + opts->no_output = 1; + } + break; + + case 'd': + { + char *p = argv[i] + 2; + char c; + while ((c = *p++) != 0) { + /* Arg to -d specifies what parts of macros to dump */ + switch (c) { + case 'M': + opts->dump_macros = dump_only; + opts->no_output = 1; + break; + case 'N': + opts->dump_macros = dump_names; + break; + case 'D': + opts->dump_macros = dump_definitions; + break; + } + } + } + break; + + case 'g': + if (argv[i][2] == '3') + opts->debug_output = 1; + break; + + case 'v': + fprintf (stderr, "GNU CPP version %s", version_string); +#ifdef TARGET_VERSION + TARGET_VERSION; +#endif + fprintf (stderr, "\n"); + opts->verbose = 1; + break; + + case 'H': + opts->print_include_names = 1; + break; + + case 'D': + if (argv[i][2] != 0) + push_pending (pfile, "-D", argv[i] + 2); + else if (i + 1 == argc) + fatal ("Macro name missing after -D option"); + else + i++, push_pending (pfile, "-D", argv[i]); + break; + + case 'A': + { + char *p; + + if (argv[i][2] != 0) + p = argv[i] + 2; + else if (i + 1 == argc) + fatal ("Assertion missing after -A option"); + else + p = argv[++i]; + + if (!strcmp (p, "-")) { + struct cpp_pending **ptr; + /* -A- eliminates all predefined macros and assertions. + Let's include also any that were specified earlier + on the command line. That way we can get rid of any + that were passed automatically in from GCC. */ + int j; + opts->inhibit_predefs = 1; + for (ptr = &opts->pending; *ptr != NULL; ) + { + struct cpp_pending *pend = *ptr; + if (pend->cmd && pend->cmd[0] == '-' + && (pend->cmd[1] == 'D' || pend->cmd[1] == 'A')) + { + *ptr = pend->next; + free (pend); + } + else + ptr = &pend->next; + } + } else { + push_pending (pfile, "-A", p); + } + } + break; + + case 'U': /* JF #undef something */ + if (argv[i][2] != 0) + push_pending (pfile, "-U", argv[i] + 2); + else if (i + 1 == argc) + fatal ("Macro name missing after -U option"); + else + push_pending (pfile, "-U", argv[i+1]), i++; + break; + + case 'C': + opts->put_out_comments = 1; + break; + + case 'E': /* -E comes from cc -E; ignore it. */ + break; + + case 'P': + opts->no_line_commands = 1; + break; + + case '$': /* Don't include $ in identifiers. */ + opts->dollars_in_ident = 0; + break; + + case 'I': /* Add directory to path for includes. */ + { + struct file_name_list *dirtmp; + + if (! CPP_OPTIONS(pfile)->ignore_srcdir + && !strcmp (argv[i] + 2, "-")) { + CPP_OPTIONS (pfile)->ignore_srcdir = 1; + /* Don't use any preceding -I directories for #include <...>. */ + CPP_OPTIONS (pfile)->first_bracket_include = 0; + } + else { + dirtmp = (struct file_name_list *) + xmalloc (sizeof (struct file_name_list)); + dirtmp->next = 0; /* New one goes on the end */ + dirtmp->control_macro = 0; + dirtmp->c_system_include_path = 0; + if (argv[i][2] != 0) + dirtmp->fname = argv[i] + 2; + else if (i + 1 == argc) + fatal ("Directory name missing after -I option"); + else + dirtmp->fname = argv[++i]; + dirtmp->got_name_map = 0; + append_include_chain (pfile, dirtmp, dirtmp); + } + } + break; + + case 'n': + if (!strcmp (argv[i], "-nostdinc")) + /* -nostdinc causes no default include directories. + You must specify all include-file directories with -I. */ + opts->no_standard_includes = 1; + else if (!strcmp (argv[i], "-nostdinc++")) + /* -nostdinc++ causes no default C++-specific include directories. */ + opts->no_standard_cplusplus_includes = 1; +#if 0 + else if (!strcmp (argv[i], "-noprecomp")) + no_precomp = 1; +#endif + break; + + case 'u': + /* Sun compiler passes undocumented switch "-undef". + Let's assume it means to inhibit the predefined symbols. */ + opts->inhibit_predefs = 1; + break; + + case '\0': /* JF handle '-' as file name meaning stdin or stdout */ + if (opts->in_fname == NULL) { + opts->in_fname = ""; + break; + } else if (opts->out_fname == NULL) { + opts->out_fname = ""; + break; + } /* else fall through into error */ + + default: + return i; + } + } + } + return i; +} + +void +cpp_finish (pfile) + cpp_reader *pfile; +{ + struct cpp_options *opts = CPP_OPTIONS (pfile); + + if (opts->print_deps) + { + /* Stream on which to print the dependency information. */ + FILE *deps_stream; + + /* Don't actually write the deps file if compilation has failed. */ + if (pfile->errors == 0) + { + char *deps_mode = opts->print_deps_append ? "a" : "w"; + if (opts->deps_file == 0) + deps_stream = stdout; + else if ((deps_stream = fopen (opts->deps_file, deps_mode)) == 0) + cpp_pfatal_with_name (pfile, opts->deps_file); + fputs (pfile->deps_buffer, deps_stream); + putc ('\n', deps_stream); + if (opts->deps_file) + { + if (ferror (deps_stream) || fclose (deps_stream) != 0) + fatal ("I/O error on output"); + } + } + } +} + +static int +do_assert (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + long symstart; /* remember where symbol name starts */ + int c; + int sym_length; /* and how long it is */ + struct arglist *tokens = NULL; + + if (CPP_PEDANTIC (pfile) && CPP_OPTIONS (pfile)->done_initializing + && !CPP_BUFFER (pfile)->system_header_p) + cpp_pedwarn (pfile, "ANSI C does not allow `#assert'"); + + cpp_skip_hspace (pfile); + symstart = CPP_WRITTEN (pfile); /* remember where it starts */ + parse_name (pfile, GETC()); + sym_length = check_macro_name (pfile, pfile->token_buffer + symstart, + "assertion"); + + cpp_skip_hspace (pfile); + if (PEEKC() != '(') { + cpp_error (pfile, "missing token-sequence in `#assert'"); + goto error; + } + + { + int error_flag = 0; + tokens = read_token_list (pfile, &error_flag); + if (error_flag) + goto error; + if (tokens == 0) { + cpp_error (pfile, "empty token-sequence in `#assert'"); + goto error; + } + cpp_skip_hspace (pfile); + c = PEEKC (); + if (c != EOF && c != '\n') + cpp_pedwarn (pfile, "junk at end of `#assert'"); + skip_rest_of_line (pfile); + } + + /* If this name isn't already an assertion name, make it one. + Error if it was already in use in some other way. */ + + { + ASSERTION_HASHNODE *hp; + U_CHAR *symname = pfile->token_buffer + symstart; + int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE); + struct tokenlist_list *value + = (struct tokenlist_list *) xmalloc (sizeof (struct tokenlist_list)); + + hp = assertion_lookup (pfile, symname, sym_length, hashcode); + if (hp == NULL) { + if (sym_length == 7 && ! strncmp (symname, "defined", sym_length)) + cpp_error (pfile, "`defined' redefined as assertion"); + hp = assertion_install (pfile, symname, sym_length, hashcode); + } + + /* Add the spec'd token-sequence to the list of such. */ + value->tokens = tokens; + value->next = hp->value; + hp->value = value; + } + CPP_SET_WRITTEN (pfile, symstart); /* Pop */ + return 0; + error: + CPP_SET_WRITTEN (pfile, symstart); /* Pop */ + skip_rest_of_line (pfile); + return 1; +} + +static int +do_unassert (pfile, keyword, buf, limit) + cpp_reader *pfile; + struct directive *keyword; + U_CHAR *buf, *limit; +{ + long symstart; /* remember where symbol name starts */ + int sym_length; /* and how long it is */ + int c; + + struct arglist *tokens = NULL; + int tokens_specified = 0; + + if (CPP_PEDANTIC (pfile) && CPP_OPTIONS (pfile)->done_initializing + && !CPP_BUFFER (pfile)->system_header_p) + cpp_pedwarn (pfile, "ANSI C does not allow `#unassert'"); + + cpp_skip_hspace (pfile); + + symstart = CPP_WRITTEN (pfile); /* remember where it starts */ + parse_name (pfile, GETC()); + sym_length = check_macro_name (pfile, pfile->token_buffer + symstart, + "assertion"); + + cpp_skip_hspace (pfile); + if (PEEKC() == '(') { + int error_flag = 0; + + tokens = read_token_list (pfile, &error_flag); + if (error_flag) + goto error; + if (tokens == 0) { + cpp_error (pfile, "empty token list in `#unassert'"); + goto error; + } + + tokens_specified = 1; + } + + cpp_skip_hspace (pfile); + c = PEEKC (); + if (c != EOF && c != '\n') + cpp_error (pfile, "junk at end of `#unassert'"); + skip_rest_of_line (pfile); + + { + ASSERTION_HASHNODE *hp; + U_CHAR *symname = pfile->token_buffer + symstart; + int hashcode = hashf (symname, sym_length, ASSERTION_HASHSIZE); + struct tokenlist_list *tail, *prev; + + hp = assertion_lookup (pfile, symname, sym_length, hashcode); + if (hp == NULL) + return 1; + + /* If no token list was specified, then eliminate this assertion + entirely. */ + if (! tokens_specified) { + struct tokenlist_list *next; + for (tail = hp->value; tail; tail = next) { + next = tail->next; + free_token_list (tail->tokens); + free (tail); + } + delete_assertion (hp); + } else { + /* If a list of tokens was given, then delete any matching list. */ + + tail = hp->value; + prev = 0; + while (tail) { + struct tokenlist_list *next = tail->next; + if (compare_token_lists (tail->tokens, tokens)) { + if (prev) + prev->next = next; + else + hp->value = tail->next; + free_token_list (tail->tokens); + free (tail); + } else { + prev = tail; + } + tail = next; + } + } + } + + CPP_SET_WRITTEN (pfile, symstart); /* Pop */ + return 0; + error: + CPP_SET_WRITTEN (pfile, symstart); /* Pop */ + skip_rest_of_line (pfile); + return 1; +} + +/* Test whether there is an assertion named NAME + and optionally whether it has an asserted token list TOKENS. + NAME is not null terminated; its length is SYM_LENGTH. + If TOKENS_SPECIFIED is 0, then don't check for any token list. */ + +int +check_assertion (pfile, name, sym_length, tokens_specified, tokens) + cpp_reader *pfile; + U_CHAR *name; + int sym_length; + int tokens_specified; + struct arglist *tokens; +{ + ASSERTION_HASHNODE *hp; + int hashcode = hashf (name, sym_length, ASSERTION_HASHSIZE); + + if (CPP_PEDANTIC (pfile) && !CPP_BUFFER (pfile)->system_header_p) + cpp_pedwarn (pfile, "ANSI C does not allow testing assertions"); + + hp = assertion_lookup (pfile, name, sym_length, hashcode); + if (hp == NULL) + /* It is not an assertion; just return false. */ + return 0; + + /* If no token list was specified, then value is 1. */ + if (! tokens_specified) + return 1; + + { + struct tokenlist_list *tail; + + tail = hp->value; + + /* If a list of tokens was given, + then succeed if the assertion records a matching list. */ + + while (tail) { + if (compare_token_lists (tail->tokens, tokens)) + return 1; + tail = tail->next; + } + + /* Fail if the assertion has no matching list. */ + return 0; + } +} + +/* Compare two lists of tokens for equality including order of tokens. */ + +static int +compare_token_lists (l1, l2) + struct arglist *l1, *l2; +{ + while (l1 && l2) { + if (l1->length != l2->length) + return 0; + if (strncmp (l1->name, l2->name, l1->length)) + return 0; + l1 = l1->next; + l2 = l2->next; + } + + /* Succeed if both lists end at the same time. */ + return l1 == l2; +} + +struct arglist * +reverse_token_list (tokens) + struct arglist *tokens; +{ + register struct arglist *prev = 0, *this, *next; + for (this = tokens; this; this = next) + { + next = this->next; + this->next = prev; + prev = this; + } + return prev; +} + +/* Read a space-separated list of tokens ending in a close parenthesis. + Return a list of strings, in the order they were written. + (In case of error, return 0 and store -1 in *ERROR_FLAG.) */ + +static struct arglist * +read_token_list (pfile, error_flag) + cpp_reader *pfile; + int *error_flag; +{ + struct arglist *token_ptrs = 0; + int depth = 1; + int length; + + *error_flag = 0; + FORWARD (1); /* Skip '(' */ + + /* Loop over the assertion value tokens. */ + while (depth > 0) + { + struct arglist *temp; + long name_written = CPP_WRITTEN (pfile); + int eofp = 0; int c; + + cpp_skip_hspace (pfile); + + c = GETC (); + + /* Find the end of the token. */ + if (c == '(') + { + CPP_PUTC (pfile, c); + depth++; + } + else if (c == ')') + { + depth--; + if (depth == 0) + break; + CPP_PUTC (pfile, c); + } + else if (c == '"' || c == '\'') + { + FORWARD(-1); + cpp_get_token (pfile); + } + else if (c == '\n') + break; + else + { + while (c != EOF && ! is_space[c] && c != '(' && c != ')' + && c != '"' && c != '\'') + { + CPP_PUTC (pfile, c); + c = GETC(); + } + if (c != EOF) FORWARD(-1); + } + + length = CPP_WRITTEN (pfile) - name_written; + temp = (struct arglist *) + xmalloc (sizeof (struct arglist) + length + 1); + temp->name = (U_CHAR *) (temp + 1); + bcopy ((char *) (pfile->token_buffer + name_written), + (char *) temp->name, length); + temp->name[length] = 0; + temp->next = token_ptrs; + token_ptrs = temp; + temp->length = length; + + CPP_ADJUST_WRITTEN (pfile, -length); /* pop */ + + if (c == EOF || c == '\n') + { /* FIXME */ + cpp_error (pfile, + "unterminated token sequence following `#' operator"); + return 0; + } + } + + /* We accumulated the names in reverse order. + Now reverse them to get the proper order. */ + return reverse_token_list (token_ptrs); +} + +static void +free_token_list (tokens) + struct arglist *tokens; +{ + while (tokens) { + struct arglist *next = tokens->next; + free (tokens->name); + free (tokens); + tokens = next; + } +} + +/* Get the file-mode and data size of the file open on FD + and store them in *MODE_POINTER and *SIZE_POINTER. */ + +static int +file_size_and_mode (fd, mode_pointer, size_pointer) + int fd; + int *mode_pointer; + long int *size_pointer; +{ + struct stat sbuf; + + if (fstat (fd, &sbuf) < 0) return (-1); + if (mode_pointer) *mode_pointer = sbuf.st_mode; + if (size_pointer) *size_pointer = sbuf.st_size; + return 0; +} + +/* Read LEN bytes at PTR from descriptor DESC, for file FILENAME, + retrying if necessary. Return a negative value if an error occurs, + otherwise return the actual number of bytes read, + which must be LEN unless end-of-file was reached. */ + +static int +safe_read (desc, ptr, len) + int desc; + char *ptr; + int len; +{ + int left = len; + while (left > 0) { + int nchars = read (desc, ptr, left); + if (nchars < 0) + { +#ifdef EINTR + if (errno == EINTR) + continue; +#endif + return nchars; + } + if (nchars == 0) + break; + ptr += nchars; + left -= nchars; + } + return len - left; +} + +static char * +savestring (input) + char *input; +{ + unsigned size = strlen (input); + char *output = xmalloc (size + 1); + strcpy (output, input); + return output; +} + +/* Return the line at which an error occurred. + The error is not necessarily associated with the current spot + in the input stack, so LINE says where. LINE will have been + copied from ip->lineno for the current input level. + If the current level is for a file, we return LINE. + But if the current level is not for a file, LINE is meaningless. + In that case, we return the lineno of the innermost file. */ + +static int +line_for_error (line) + int line; +{ +#if 0 + int i; + int line1 = line; + + for (i = indepth; i >= 0; ) { + if (instack[i].fname != 0) + return line1; + i--; + if (i < 0) + return 0; + line1 = instack[i].lineno; + } + abort (); + /*NOTREACHED*/ +#endif + return 0; +} + +/* Initialize PMARK to remember the current position of PFILE. */ +void +parse_set_mark (pmark, pfile) + struct parse_marker *pmark; + cpp_reader *pfile; +{ + cpp_buffer *pbuf = CPP_BUFFER (pfile); + pmark->next = pbuf->marks; + pbuf->marks = pmark; + pmark->buf = pbuf; + pmark->position = pbuf->cur - pbuf->buf; +} + +/* Cleanup PMARK - we no longer need it. */ +void +parse_clear_mark (pmark) + struct parse_marker *pmark; +{ + struct parse_marker **pp = &pmark->buf->marks; + for (; ; pp = &(*pp)->next) { + if (*pp == NULL) fatal ("internal error", "in parse_set_mark"); + if (*pp == pmark) break; + } + *pp = pmark->next; +} + +/* Backup the current position of PFILE to that saved in PMARK. */ + +void +parse_goto_mark (pmark, pfile) + struct parse_marker *pmark; + cpp_reader *pfile; +{ + cpp_buffer *pbuf = CPP_BUFFER (pfile); + if (pbuf != pmark->buf) + fatal ("internal error %s", "parse_goto_mark"); + pbuf->cur = pbuf->buf + pmark->position; +} + +/* Reset PMARK to point to the current position of PFILE. (Same + as parse_clear_mark (PMARK), parse_set_mark (PMARK, PFILE) but faster. */ + +void +parse_move_mark (pmark, pfile) + struct parse_marker *pmark; + cpp_reader *pfile; +{ + cpp_buffer *pbuf = CPP_BUFFER (pfile); + if (pbuf != pmark->buf) + fatal ("internal error %s", "parse_move_mark"); + pmark->position = pbuf->cur - pbuf->buf; +} + +int +cpp_read_check_assertion (pfile) + cpp_reader *pfile; +{ + int name_start = CPP_WRITTEN (pfile); + int name_length, name_written; + int result; + FORWARD (1); /* Skip '#' */ + cpp_skip_hspace (pfile); + parse_name (pfile, GETC ()); + name_written = CPP_WRITTEN (pfile); + name_length = name_written - name_start; + cpp_skip_hspace (pfile); + if (CPP_BUF_PEEK (CPP_BUFFER (pfile)) == '(') + { + int error_flag; + struct arglist *token_ptrs = read_token_list (pfile, &error_flag); + result = check_assertion (pfile, + pfile->token_buffer + name_start, name_length, + 1, token_ptrs); + } + else + result = check_assertion (pfile, + pfile->token_buffer + name_start, name_length, + 0, NULL_PTR); + CPP_ADJUST_WRITTEN (pfile, - name_length); /* pop */ + return result; +} + +/* TODO: + * No pre-compiled header file support. + * + * Possibly different enum token codes for each C/C++ token. + * + * Better error messages for non-terminated strings and comments. + * + * Should clean up remaining directives to that do_XXX functions + * only take two arguments and all have command_reads_line. + * + * Find and cleanup remaining uses of static variables, + * + * Support for trigraphs. + * + * Support -dM flag (dump_all_macros). + * + * -include should be made to returns results incrementally. + * (current implementation only works when cpp is used as main program) + * + */ diff --git a/gcc/cpplib.h b/gcc/cpplib.h new file mode 100644 index 00000000000..ae4757a76bf --- /dev/null +++ b/gcc/cpplib.h @@ -0,0 +1,657 @@ +/* Definitions for CPP library. + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994-95. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#include <sys/types.h> +#include <sys/stat.h> + +#ifdef __cplusplus +extern "C" { +#endif + +#define STATIC_BUFFERS + +typedef unsigned char U_CHAR; + +#ifndef FAILURE_EXIT_CODE +#define FAILURE_EXIT_CODE 33 /* gnu cc command understands this */ +#endif + +#ifndef SUCCESS_EXIT_CODE +#define SUCCESS_EXIT_CODE 0 /* 0 means success on Unix. */ +#endif + +struct parse_file; +typedef struct cpp_reader cpp_reader; +typedef struct cpp_buffer cpp_buffer; +typedef struct cpp_options cpp_options; +typedef struct hashnode cpp_hashnode; + +enum cpp_token { + CPP_EOF = -1, + CPP_OTHER = 0, + CPP_COMMENT = 1, + CPP_HSPACE, + CPP_VSPACE, /* newlines and #line directives */ + CPP_NAME, + CPP_NUMBER, + CPP_CHAR, + CPP_STRING, + CPP_DIRECTIVE, + CPP_LPAREN, /* "(" */ + CPP_RPAREN, /* ")" */ + CPP_LBRACE, /* "{" */ + CPP_RBRACE, /* "}" */ + CPP_COMMA, /* "," */ + CPP_SEMICOLON,/* ";" */ + CPP_3DOTS, /* "..." */ +#if 0 + CPP_ANDAND, /* "&&" */ + CPP_OROR, /* "||" */ + CPP_LSH, /* "<<" */ + CPP_RSH, /* ">>" */ + CPP_EQL, /* "==" */ + CPP_NEQ, /* "!=" */ + CPP_LEQ, /* "<=" */ + CPP_GEQ, /* ">=" */ + CPP_PLPL, /* "++" */ + CPP_MINMIN, /* "--" */ +#endif + /* POP_TOKEN is returned when we've popped a cpp_buffer. */ + CPP_POP +}; + +#ifndef PARAMS +#ifdef __STDC +#define PARAMS(P) P +#else +#define PARAMS(P) () +#endif +#endif /* !PARAMS */ + +typedef enum cpp_token (*parse_underflow_t) PARAMS((cpp_reader*)); +typedef int (*parse_cleanup_t) PARAMS((cpp_buffer *, cpp_reader*)); + +/* A parse_marker indicates a previous position, + which we can backtrack to. */ + +struct parse_marker { + cpp_buffer *buf; + struct parse_marker *next; + int position; +}; + +extern void parse_set_mark PARAMS ((struct parse_marker*, cpp_reader*)); +extern void parse_clear_mark PARAMS ((struct parse_marker*)); +extern void parse_goto_mark PARAMS((struct parse_marker*, cpp_reader*)); +extern void parse_move_mark PARAMS((struct parse_marker*, cpp_reader*)); + +extern int cpp_handle_options PARAMS ((cpp_reader*, int, char**)); +extern enum cpp_token cpp_get_token PARAMS ((struct parse_marker*)); +extern void cpp_skip_hspace PARAMS((cpp_reader*)); +extern enum cpp_token cpp_get_non_space_token PARAMS ((cpp_reader *)); + + +/* Maintain and search list of included files, for #import. */ + +#define IMPORT_HASH_SIZE 31 + +struct import_file { + char *name; + ino_t inode; + dev_t dev; + struct import_file *next; +}; + +/* If we have a huge buffer, may need to cache more recent counts */ +#define CPP_LINE_BASE(BUF) ((BUF)->buf + (BUF)->line_base) + +struct cpp_buffer { + unsigned char *buf; + unsigned char *cur; + unsigned char *rlimit; /* end of valid data */ + unsigned char *alimit; /* end of allocated buffer */ + unsigned char *prev; /* start of current token */ + + char *fname; + /* Filename specified with #line command. */ + char *nominal_fname; + + /* Record where in the search path this file was found. + For #include_next. */ + struct file_name_list *dir; + + long line_base; + long lineno; /* Line number at CPP_LINE_BASE. */ + long colno; /* Column number at CPP_LINE_BASE. */ +#ifndef STATIC_BUFFERS + cpp_buffer *chain; +#endif + parse_underflow_t underflow; + parse_cleanup_t cleanup; + void *data; + struct parse_marker *marks; + /* Value of if_stack at start of this file. + Used to prohibit unmatched #endif (etc) in an include file. */ + struct if_stack *if_stack; + + /* True if this is a header file included using <FILENAME>. */ + char system_header_p; + char seen_eof; + + /* True if buffer contains escape sequences. + Currently there are are only two kind: + "@-" means following identifier should not be macro-expanded. + "@@" means a normal '@'. */ + char has_escapes; +}; + +struct cpp_pending; /* Forward declaration - for C++. */ + +typedef struct assertion_hashnode ASSERTION_HASHNODE; +#define ASSERTION_HASHSIZE 37 + +#ifdef STATIC_BUFFERS +/* Maximum nesting of cpp_buffers. We use a static limit, partly for + efficiency, and partly to limit runaway recursion. */ +#define CPP_STACK_MAX 200 +#endif + +struct cpp_reader { + unsigned char *limit; + parse_underflow_t get_token; + cpp_buffer *buffer; +#ifdef STATIC_BUFFERS + cpp_buffer buffer_stack[CPP_STACK_MAX]; +#endif + + int errors; /* Error counter for exit code */ + /* While scanning a comment or a string constant, + this records the line it started on, for error messages. */ + int start_line; + void *data; + + U_CHAR *token_buffer; + int token_buffer_size; + + /* Current depth in #include directives that use <...>. */ + int system_include_depth; + + /* List of included files that contained #pragma once. */ + struct file_name_list *dont_repeat_files; + + /* List of other included files. + If ->control_macro if nonzero, the file had a #ifndef + around the entire contents, and ->control_macro gives the macro name. */ + struct file_name_list *all_include_files; + + /* Current maximum length of directory names in the search path + for include files. (Altered as we get more of them.) */ + int max_include_len; + + /* Hash table of files already included with #include or #import. */ + struct import_file *import_hash_table[IMPORT_HASH_SIZE]; + + struct if_stack *if_stack; + + /* Nonzero means we are inside an IF during a -pcp run. In this mode + macro expansion is done, and preconditions are output for all macro + uses requiring them. */ + char pcp_inside_if; + + /* Nonzero means we have printed (while error reporting) a list of + containing files that matches the current status. */ + char input_stack_listing_current; + + /* If non-zero, macros are not expanded. */ + char no_macro_expand; + + /* Print column number in error messages. */ + char show_column; + + /* We're printed a warning recommending against using #import. */ + char import_warning; + + /* If true, character between '<' and '>' are a single (string) token. */ + char parsing_include_directive; + + /* True if escape sequences (as described for has_escapes in + parse_buffer) should be emitted. */ + char output_escapes; + + /* 0: Have seen non-white-space on this line. + 1: Only seen white space so far on this line. + 2: Only seen white space so far in this file. */ + char only_seen_white; + + /* Nonzero means this file was included with a -imacros or -include + command line and should not be recorded as an include file. */ + + int no_record_file; + + long lineno; + + struct tm *timebuf; + + ASSERTION_HASHNODE *assertion_hashtab[ASSERTION_HASHSIZE]; + + /* Buffer of -M output. */ + char *deps_buffer; + + /* Number of bytes allocated in above. */ + int deps_allocated_size; + + /* Number of bytes used. */ + int deps_size; + + /* Number of bytes since the last newline. */ + int deps_column; +}; + +#define CPP_BUF_PEEK(BUFFER) \ + ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur : EOF) +#define CPP_BUF_GET(BUFFER) \ + ((BUFFER)->cur < (BUFFER)->rlimit ? *(BUFFER)->cur++ : EOF) +#define CPP_FORWARD(BUFFER, N) ((BUFFER)->cur += (N)) + +/* Number of characters currently in PFILE's output buffer. */ +#define CPP_WRITTEN(PFILE) ((PFILE)->limit - (PFILE)->token_buffer) +#define CPP_PWRITTEN(PFILE) ((PFILE)->limit) + +/* Make sure PFILE->token_buffer has space for at least N more characters. */ +#define CPP_RESERVE(PFILE, N) \ + (CPP_WRITTEN (PFILE) + N > (PFILE)->token_buffer_size \ + && (cpp_grow_buffer (PFILE, N), 0)) + +/* Append string STR (of length N) to PFILE's output buffer. + Assume there is enough space. */ +#define CPP_PUTS_Q(PFILE, STR, N) \ + (bcopy (STR, (PFILE)->limit, (N)), (PFILE)->limit += (N)) +/* Append string STR (of length N) to PFILE's output buffer. Make space. */ +#define CPP_PUTS(PFILE, STR, N) CPP_RESERVE(PFILE, N), CPP_PUTS_Q(PFILE, STR,N) +/* Append character CH to PFILE's output buffer. Assume sufficient space. */ +#define CPP_PUTC_Q(PFILE, CH) (*(PFILE)->limit++ = (CH)) +/* Append character CH to PFILE's output buffer. Make space if need be. */ +#define CPP_PUTC(PFILE, CH) (CPP_RESERVE (PFILE, 1), CPP_PUTC_Q (PFILE, CH)) +/* Make sure PFILE->limit is followed by '\0'. */ +#define CPP_NUL_TERMINATE_Q(PFILE) (*(PFILE)->limit = 0) +#define CPP_NUL_TERMINATE(PFILE) (CPP_RESERVE(PFILE, 1), *(PFILE)->limit = 0) +#define CPP_ADJUST_WRITTEN(PFILE,DELTA) ((PFILE)->limit += (DELTA)) +#define CPP_SET_WRITTEN(PFILE,N) ((PFILE)->limit = (PFILE)->token_buffer + (N)) + +#define CPP_OPTIONS(PFILE) ((cpp_options*)(PFILE)->data) +#define CPP_BUFFER(PFILE) ((PFILE)->buffer) +#ifdef STATIC_BUFFERS +#define CPP_PREV_BUFFER(BUFFER) ((BUFFER)+1) +#define CPP_NULL_BUFFER(PFILE) (&(PFILE)->buffer_stack[CPP_STACK_MAX]) +#else +#define CPP_PREV_BUFFER(BUFFER) ((BUFFER)->chain) +#define CPP_NULL_BUFFER(PFILE) ((cpp_buffer*)0) +#endif + +/* Pointed to by parse_file::data. */ +struct cpp_options { + char *in_fname; + + /* Name of output file, for error messages. */ + char *out_fname; + + /* Non-0 means -v, so print the full set of include dirs. */ + char verbose; + + /* Nonzero means use extra default include directories for C++. */ + + char cplusplus; + + /* Nonzero means handle cplusplus style comments */ + + char cplusplus_comments; + + /* Nonzero means handle #import, for objective C. */ + + char objc; + + /* Nonzero means this is an assembly file, and allow + unknown directives, which could be comments. */ + + int lang_asm; + + /* Nonzero means turn NOTREACHED into #pragma NOTREACHED etc */ + + char for_lint; + + /* Nonzero means handle CHILL comment syntax + and output CHILL string delimeter for __DATE___ etc. */ + + char chill; + + /* Nonzero means copy comments into the output file. */ + + char put_out_comments; + + /* Nonzero means don't process the ANSI trigraph sequences. */ + + char no_trigraphs; + + /* Nonzero means print the names of included files rather than + the preprocessed output. 1 means just the #include "...", + 2 means #include <...> as well. */ + + char print_deps; + + /* Nonzero if missing .h files in -M output are assumed to be generated + files and not errors. */ + + char print_deps_missing_files; + + /* If true, fopen (deps_file, "a") else fopen (deps_file, "w"). */ + char print_deps_append; + + /* Nonzero means print names of header files (-H). */ + + char print_include_names; + + /* Nonzero means try to make failure to fit ANSI C an error. */ + + char pedantic_errors; + + /* Nonzero means don't print warning messages. -w. */ + + char inhibit_warnings; + + /* Nonzero means warn if slash-star appears in a comment. */ + + char warn_comments; + + /* Nonzero means warn if there are any trigraphs. */ + + char warn_trigraphs; + + /* Nonzero means warn if #import is used. */ + + char warn_import; + + /* Nonzero means warn if a macro argument is (or would be) + stringified with -traditional. */ + + char warn_stringify; + + /* Nonzero means turn warnings into errors. */ + + char warnings_are_errors; + + /* Nonzero causes output not to be done, + but directives such as #define that have side effects + are still obeyed. */ + + char no_output; + + /* Nonzero means don't output line number information. */ + + char no_line_commands; + +/* Nonzero means output the text in failing conditionals, + inside #failed ... #endfailed. */ + + char output_conditionals; + + /* Nonzero means -I- has been seen, + so don't look for #include "foo" the source-file directory. */ + char ignore_srcdir; + +/* Zero means dollar signs are punctuation. + -$ stores 0; -traditional may store 1. Default is 1 for VMS, 0 otherwise. + This must be 0 for correct processing of this ANSI C program: + #define foo(a) #a + #define lose(b) foo (b) + #define test$ + lose (test) */ + char dollars_in_ident; +#ifndef DOLLARS_IN_IDENTIFIERS +#define DOLLARS_IN_IDENTIFIERS 1 +#endif + + /* Nonzero means try to imitate old fashioned non-ANSI preprocessor. */ + char traditional; + + /* Nonzero means give all the error messages the ANSI standard requires. */ + char pedantic; + + char done_initializing; + + struct file_name_list *include; /* First dir to search */ + /* First dir to search for <file> */ + /* This is the first element to use for #include <...>. + If it is 0, use the entire chain for such includes. */ + struct file_name_list *first_bracket_include; + /* This is the first element in the chain that corresponds to + a directory of system header files. */ + struct file_name_list *first_system_include; + struct file_name_list *last_include; /* Last in chain */ + + /* Chain of include directories to put at the end of the other chain. */ + struct file_name_list *after_include; + struct file_name_list *last_after_include; /* Last in chain */ + + /* Chain to put at the start of the system include files. */ + struct file_name_list *before_system; + struct file_name_list *last_before_system; /* Last in chain */ + + /* Directory prefix that should replace `/usr' in the standard + include file directories. */ + char *include_prefix; + + char inhibit_predefs; + char no_standard_includes; + char no_standard_cplusplus_includes; + +/* dump_only means inhibit output of the preprocessed text + and instead output the definitions of all user-defined + macros in a form suitable for use as input to cccp. + dump_names means pass #define and the macro name through to output. + dump_definitions means pass the whole definition (plus #define) through +*/ + + enum {dump_none = 0, dump_only, dump_names, dump_definitions} + dump_macros; + +/* Nonzero means pass all #define and #undef directives which we actually + process through to the output stream. This feature is used primarily + to allow cc1 to record the #defines and #undefs for the sake of + debuggers which understand about preprocessor macros, but it may + also be useful with -E to figure out how symbols are defined, and + where they are defined. */ + int debug_output; + + /* Pending -D, -U and -A options, in reverse order. */ + struct cpp_pending *pending; + + /* File name which deps are being written to. + This is 0 if deps are being written to stdout. */ + char *deps_file; + + /* Target-name to write with the dependency information. */ + char *deps_target; +}; + +#define CPP_TRADITIONAL(PFILE) (CPP_OPTIONS(PFILE)-> traditional) +#define CPP_PEDANTIC(PFILE) (CPP_OPTIONS (PFILE)->pedantic) +#define CPP_PRINT_DEPS(PFILE) (CPP_OPTIONS (PFILE)->print_deps) + +#define PARSE_GETC(IN) ((IN)-> cur < (IN)->limit || ((IN)->cur = (IN)->token_buffer, (IN)->underflow (IN) != EOF_TOKEN) ? *(IN)->cur++ : EOF) + +/* Name under which this program was invoked. */ + +extern char *progname; + +/* The structure of a node in the hash table. The hash table + has entries for all tokens defined by #define commands (type T_MACRO), + plus some special tokens like __LINE__ (these each have their own + type, and the appropriate code is run when that type of node is seen. + It does not contain control words like "#define", which are recognized + by a separate piece of code. */ + +/* different flavors of hash nodes --- also used in keyword table */ +enum node_type { + T_DEFINE = 1, /* the `#define' keyword */ + T_INCLUDE, /* the `#include' keyword */ + T_INCLUDE_NEXT, /* the `#include_next' keyword */ + T_IMPORT, /* the `#import' keyword */ + T_IFDEF, /* the `#ifdef' keyword */ + T_IFNDEF, /* the `#ifndef' keyword */ + T_IF, /* the `#if' keyword */ + T_ELSE, /* `#else' */ + T_PRAGMA, /* `#pragma' */ + T_ELIF, /* `#elif' */ + T_UNDEF, /* `#undef' */ + T_LINE, /* `#line' */ + T_ERROR, /* `#error' */ + T_WARNING, /* `#warning' */ + T_ENDIF, /* `#endif' */ + T_SCCS, /* `#sccs', used on system V. */ + T_IDENT, /* `#ident', used on system V. */ + T_ASSERT, /* `#assert', taken from system V. */ + T_UNASSERT, /* `#unassert', taken from system V. */ + T_SPECLINE, /* special symbol `__LINE__' */ + T_DATE, /* `__DATE__' */ + T_FILE, /* `__FILE__' */ + T_BASE_FILE, /* `__BASE_FILE__' */ + T_INCLUDE_LEVEL, /* `__INCLUDE_LEVEL__' */ + T_VERSION, /* `__VERSION__' */ + T_SIZE_TYPE, /* `__SIZE_TYPE__' */ + T_PTRDIFF_TYPE, /* `__PTRDIFF_TYPE__' */ + T_WCHAR_TYPE, /* `__WCHAR_TYPE__' */ + T_USER_LABEL_PREFIX_TYPE, /* `__USER_LABEL_PREFIX__' */ + T_REGISTER_PREFIX_TYPE, /* `__REGISTER_PREFIX__' */ + T_TIME, /* `__TIME__' */ + T_CONST, /* Constant value, used by `__STDC__' */ + T_MACRO, /* macro defined by `#define' */ + T_DISABLED, /* macro temporarily turned off for rescan */ + T_SPEC_DEFINED, /* special `defined' macro for use in #if statements */ + T_PCSTRING, /* precompiled string (hashval is KEYDEF *) */ + T_UNUSED /* Used for something not defined. */ + }; + +/* Structure returned by create_definition */ +typedef struct macrodef MACRODEF; +struct macrodef +{ + struct definition *defn; + U_CHAR *symnam; + int symlen; +}; + +/* Structure allocated for every #define. For a simple replacement + such as + #define foo bar , + nargs = -1, the `pattern' list is null, and the expansion is just + the replacement text. Nargs = 0 means a functionlike macro with no args, + e.g., + #define getchar() getc (stdin) . + When there are args, the expansion is the replacement text with the + args squashed out, and the reflist is a list describing how to + build the output from the input: e.g., "3 chars, then the 1st arg, + then 9 chars, then the 3rd arg, then 0 chars, then the 2nd arg". + The chars here come from the expansion. Whatever is left of the + expansion after the last arg-occurrence is copied after that arg. + Note that the reflist can be arbitrarily long--- + its length depends on the number of times the arguments appear in + the replacement text, not how many args there are. Example: + #define f(x) x+x+x+x+x+x+x would have replacement text "++++++" and + pattern list + { (0, 1), (1, 1), (1, 1), ..., (1, 1), NULL } + where (x, y) means (nchars, argno). */ + +typedef struct definition DEFINITION; +struct definition { + int nargs; + int length; /* length of expansion string */ + int predefined; /* True if the macro was builtin or */ + /* came from the command line */ + U_CHAR *expansion; + int line; /* Line number of definition */ + char *file; /* File of definition */ + char rest_args; /* Nonzero if last arg. absorbs the rest */ + struct reflist { + struct reflist *next; + char stringify; /* nonzero if this arg was preceded by a + # operator. */ + char raw_before; /* Nonzero if a ## operator before arg. */ + char raw_after; /* Nonzero if a ## operator after arg. */ + char rest_args; /* Nonzero if this arg. absorbs the rest */ + int nchars; /* Number of literal chars to copy before + this arg occurrence. */ + int argno; /* Number of arg to substitute (origin-0) */ + } *pattern; + union { + /* Names of macro args, concatenated in reverse order + with comma-space between them. + The only use of this is that we warn on redefinition + if this differs between the old and new definitions. */ + U_CHAR *argnames; + } args; +}; + +extern U_CHAR is_idchar[256]; + +/* Stack of conditionals currently in progress + (including both successful and failing conditionals). */ + +struct if_stack { + struct if_stack *next; /* for chaining to the next stack frame */ + char *fname; /* copied from input when frame is made */ + int lineno; /* similarly */ + int if_succeeded; /* true if a leg of this if-group + has been passed through rescan */ + U_CHAR *control_macro; /* For #ifndef at start of file, + this is the macro name tested. */ + enum node_type type; /* type of last directive seen in this group */ +}; +typedef struct if_stack IF_STACK_FRAME; + +extern void cpp_buf_line_and_col PARAMS((cpp_buffer*, long*, long*)); +extern cpp_buffer* cpp_file_buffer PARAMS((cpp_reader*)); + +extern void cpp_error (); +extern void cpp_warning (); +extern void cpp_pedwarn (); +extern void cpp_error_with_line (); +extern void cpp_warning_with_line (); +extern void cpp_pedwarn_with_line (); +extern void cpp_pedwarn_with_file_and_line (); +extern void fatal (); +extern void cpp_error_from_errno (); +extern void cpp_perror_with_name (); +extern void cpp_pfatal_with_name (); + +extern void cpp_grow_buffer PARAMS ((cpp_reader*, long)); +extern int cpp_parse_escape PARAMS ((cpp_reader*, char**)); +extern cpp_buffer* cpp_push_buffer PARAMS ((cpp_reader *, U_CHAR*, long)); +extern cpp_buffer* cpp_pop_buffer PARAMS ((cpp_reader *)); + +extern cpp_hashnode* cpp_lookup PARAMS ((cpp_reader*, const U_CHAR*, + int, int)); + +extern long cpp_parse_expr PARAMS ((cpp_reader*)); + +#ifdef __cplusplus +} +#endif diff --git a/gcc/cppmain.c b/gcc/cppmain.c new file mode 100644 index 00000000000..32131720c93 --- /dev/null +++ b/gcc/cppmain.c @@ -0,0 +1,102 @@ +/* CPP main program, using CPP Library. + Copyright (C) 1995 Free Software Foundation, Inc. + Written by Per Bothner, 1994-95. + +This program is free software; you can redistribute it and/or modify it +under the terms of the GNU General Public License as published by the +Free Software Foundation; either version 2, or (at your option) any +later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. + + In other words, you are welcome to use, share and improve this program. + You are forbidden to forbid anyone else to use, share and improve + what you give them. Help stamp out software-hoarding! */ + +#include "cpplib.h" +#include <stdio.h> + +extern char *getenv (); + +cpp_reader parse_in; +cpp_options options; + +/* More 'friendly' abort that prints the line and file. + config.h can #define abort fancy_abort if you like that sort of thing. */ + +void +fancy_abort () +{ + fatal ("Internal gcc abort."); +} + + +int +main (argc, argv) + int argc; + char **argv; +{ + char *p; + int i; + int argi = 1; /* Next argument to handle. */ + struct cpp_options *opts = &options; + + p = argv[0] + strlen (argv[0]); + while (p != argv[0] && p[-1] != '/') --p; + progname = p; + + init_parse_file (&parse_in); + parse_in.data = opts; + + init_parse_options (opts); + + argi += cpp_handle_options (&parse_in, argc - argi , argv + argi); + if (argi < argc) + fatal ("Invalid option `%s'", argv[argi]); + parse_in.show_column = 1; + + i = push_parse_file (&parse_in, opts->in_fname); + if (i != SUCCESS_EXIT_CODE) + return i; + + /* Now that we know the input file is valid, open the output. */ + + if (!opts->out_fname || !strcmp (opts->out_fname, "")) + opts->out_fname = "stdout"; + else if (! freopen (opts->out_fname, "w", stdout)) + cpp_pfatal_with_name (&parse_in, opts->out_fname); + + for (;;) + { +#if 0 + int ch = PARSE_GETC (&parse_in); + if (ch < 0) + break; + if (! opts->no_output) + putchar (ch); +#else + enum cpp_token kind; + if (! opts->no_output) + { + fwrite (parse_in.token_buffer, 1, CPP_WRITTEN (&parse_in), stdout); + } + parse_in.limit = parse_in.token_buffer; + kind = cpp_get_token (&parse_in); + if (kind == CPP_EOF) + break; +#endif + } + + cpp_finish (&parse_in); + + if (parse_in.errors) + exit (FAILURE_EXIT_CODE); + exit (SUCCESS_EXIT_CODE); +} |
