2000-06-14 Pierre Muller <muller@ics.u-strasbg.fr>

	Add support for Pascal language. Part 1: new files.
	* p-exp.y, p-lang.c, p-lang.h, p-typeprint.c, p-valprint.c: New files.

1 files changed, 430 insertions, 0 deletions

diff --git a/gdb/p-lang.c b/gdb/p-lang.c
new file mode 100644
index 0000000000..db33eb787b
--- /dev/null
+++ b/gdb/p-lang.c
@@ -0,0 +1,430 @@
+/* Pascal language support routines for GDB, the GNU debugger.
+   Copyright 2000 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   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 of the License, 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, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* This file is derived from p-lang.c */
+
+#include "defs.h"
+#include "symtab.h"
+#include "gdbtypes.h"
+#include "expression.h"
+#include "parser-defs.h"
+#include "language.h"
+#include "p-lang.h"
+#include "valprint.h"
+
+extern void _initialize_pascal_language (void);
+static void pascal_one_char (int, struct ui_file *, int *);
+
+/* Print the character C on STREAM as part of the contents of a literal
+   string.
+   In_quotes is reset to 0 if a char is written with #4 notation */
+
+static void
+pascal_one_char (c, stream, in_quotes)
+     register int c;
+     struct ui_file *stream;
+     int *in_quotes;
+{
+
+  c &= 0xFF;			/* Avoid sign bit follies */
+
+  if ((c == '\'') || (PRINT_LITERAL_FORM (c)))
+    {
+      if (!(*in_quotes))
+	fputs_filtered ("'", stream);
+      *in_quotes = 1;
+      if (c == '\'')
+	{
+	  fputs_filtered ("''", stream);
+	}
+      else
+	fprintf_filtered (stream, "%c", c);
+    }
+  else
+    {
+      if (*in_quotes)
+	fputs_filtered ("'", stream);
+      *in_quotes = 0;
+      fprintf_filtered (stream, "#%d", (unsigned int) c);
+    }
+}
+
+static void pascal_emit_char (int c, struct ui_file *stream, int quoter);
+
+/* Print the character C on STREAM as part of the contents of a literal
+   string whose delimiter is QUOTER.  Note that that format for printing
+   characters and strings is language specific. */
+
+static void
+pascal_emit_char (c, stream, quoter)
+     register int c;
+     struct ui_file *stream;
+     int quoter;
+{
+  int in_quotes = 0;
+  pascal_one_char (c, stream, &in_quotes);
+  if (in_quotes)
+    fputs_filtered ("'", stream);
+}
+
+void
+pascal_printchar (c, stream)
+     int c;
+     struct ui_file *stream;
+{
+  int in_quotes = 0;
+  pascal_one_char (c, stream, &in_quotes);
+  if (in_quotes)
+    fputs_filtered ("'", stream);
+}
+
+/* Print the character string STRING, printing at most LENGTH characters.
+   Printing stops early if the number hits print_max; repeat counts
+   are printed as appropriate.  Print ellipses at the end if we
+   had to stop before printing LENGTH characters, or if FORCE_ELLIPSES.  */
+
+void
+pascal_printstr (stream, string, length, width, force_ellipses)
+     struct ui_file *stream;
+     char *string;
+     unsigned int length;
+     int width;
+     int force_ellipses;
+{
+  register unsigned int i;
+  unsigned int things_printed = 0;
+  int in_quotes = 0;
+  int need_comma = 0;
+  extern int inspect_it;
+
+  /* If the string was not truncated due to `set print elements', and
+     the last byte of it is a null, we don't print that, in traditional C
+     style.  */
+  if ((!force_ellipses) && length > 0 && string[length - 1] == '\0')
+    length--;
+
+  if (length == 0)
+    {
+      fputs_filtered ("''", stream);
+      return;
+    }
+
+  for (i = 0; i < length && things_printed < print_max; ++i)
+    {
+      /* Position of the character we are examining
+         to see whether it is repeated.  */
+      unsigned int rep1;
+      /* Number of repetitions we have detected so far.  */
+      unsigned int reps;
+
+      QUIT;
+
+      if (need_comma)
+	{
+	  fputs_filtered (", ", stream);
+	  need_comma = 0;
+	}
+
+      rep1 = i + 1;
+      reps = 1;
+      while (rep1 < length && string[rep1] == string[i])
+	{
+	  ++rep1;
+	  ++reps;
+	}
+
+      if (reps > repeat_count_threshold)
+	{
+	  if (in_quotes)
+	    {
+	      if (inspect_it)
+		fputs_filtered ("\\', ", stream);
+	      else
+		fputs_filtered ("', ", stream);
+	      in_quotes = 0;
+	    }
+	  pascal_printchar (string[i], stream);
+	  fprintf_filtered (stream, " <repeats %u times>", reps);
+	  i = rep1 - 1;
+	  things_printed += repeat_count_threshold;
+	  need_comma = 1;
+	}
+      else
+	{
+	  int c = string[i];
+	  if ((!in_quotes) && (PRINT_LITERAL_FORM (c)))
+	    {
+	      if (inspect_it)
+		fputs_filtered ("\\'", stream);
+	      else
+		fputs_filtered ("'", stream);
+	      in_quotes = 1;
+	    }
+	  pascal_one_char (c, stream, &in_quotes);
+	  ++things_printed;
+	}
+    }
+
+  /* Terminate the quotes if necessary.  */
+  if (in_quotes)
+    {
+      if (inspect_it)
+	fputs_filtered ("\\'", stream);
+      else
+	fputs_filtered ("'", stream);
+    }
+
+  if (force_ellipses || i < length)
+    fputs_filtered ("...", stream);
+}
+
+/* Create a fundamental Pascal type using default reasonable for the current
+   target machine.
+
+   Some object/debugging file formats (DWARF version 1, COFF, etc) do not
+   define fundamental types such as "int" or "double".  Others (stabs or
+   DWARF version 2, etc) do define fundamental types.  For the formats which
+   don't provide fundamental types, gdb can create such types using this
+   function.
+
+   FIXME:  Some compilers distinguish explicitly signed integral types
+   (signed short, signed int, signed long) from "regular" integral types
+   (short, int, long) in the debugging information.  There is some dis-
+   agreement as to how useful this feature is.  In particular, gcc does
+   not support this.  Also, only some debugging formats allow the
+   distinction to be passed on to a debugger.  For now, we always just
+   use "short", "int", or "long" as the type name, for both the implicit
+   and explicitly signed types.  This also makes life easier for the
+   gdb test suite since we don't have to account for the differences
+   in output depending upon what the compiler and debugging format
+   support.  We will probably have to re-examine the issue when gdb
+   starts taking it's fundamental type information directly from the
+   debugging information supplied by the compiler.  fnf@cygnus.com */
+
+/* Note there might be some discussion about the choosen correspondance
+   because it mainly reflects Free Pascal Compiler setup for now PM */
+
+
+struct type *
+pascal_create_fundamental_type (objfile, typeid)
+     struct objfile *objfile;
+     int typeid;
+{
+  register struct type *type = NULL;
+
+  switch (typeid)
+    {
+    default:
+      /* FIXME:  For now, if we are asked to produce a type not in this
+         language, create the equivalent of a C integer type with the
+         name "<?type?>".  When all the dust settles from the type
+         reconstruction work, this should probably become an error. */
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "<?type?>", objfile);
+      warning ("internal error: no Pascal fundamental type %d", typeid);
+      break;
+    case FT_VOID:
+      type = init_type (TYPE_CODE_VOID,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "void", objfile);
+      break;
+    case FT_CHAR:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "char", objfile);
+      break;
+    case FT_SIGNED_CHAR:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			0, "shortint", objfile);
+      break;
+    case FT_UNSIGNED_CHAR:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_CHAR_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "byte", objfile);
+      break;
+    case FT_SHORT:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			0, "integer", objfile);
+      break;
+    case FT_SIGNED_SHORT:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			0, "integer", objfile);		/* FIXME-fnf */
+      break;
+    case FT_UNSIGNED_SHORT:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_SHORT_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "word", objfile);
+      break;
+    case FT_INTEGER:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "longint", objfile);
+      break;
+    case FT_SIGNED_INTEGER:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			0, "longint", objfile);		/* FIXME -fnf */
+      break;
+    case FT_UNSIGNED_INTEGER:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_INT_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "cardinal", objfile);
+      break;
+    case FT_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long", objfile);
+      break;
+    case FT_SIGNED_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long", objfile);	/* FIXME -fnf */
+      break;
+    case FT_UNSIGNED_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "unsigned long", objfile);
+      break;
+    case FT_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			0, "long long", objfile);
+      break;
+    case FT_SIGNED_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			0, "signed long long", objfile);
+      break;
+    case FT_UNSIGNED_LONG_LONG:
+      type = init_type (TYPE_CODE_INT,
+			TARGET_LONG_LONG_BIT / TARGET_CHAR_BIT,
+			TYPE_FLAG_UNSIGNED, "unsigned long long", objfile);
+      break;
+    case FT_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_FLOAT_BIT / TARGET_CHAR_BIT,
+			0, "float", objfile);
+      break;
+    case FT_DBL_PREC_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "double", objfile);
+      break;
+    case FT_EXT_PREC_FLOAT:
+      type = init_type (TYPE_CODE_FLT,
+			TARGET_LONG_DOUBLE_BIT / TARGET_CHAR_BIT,
+			0, "extended", objfile);
+      break;
+    }
+  return (type);
+}
+
+
+/* Table mapping opcodes into strings for printing operators
+   and precedences of the operators.  */
+
+const struct op_print pascal_op_print_tab[] =
+{
+  {",", BINOP_COMMA, PREC_COMMA, 0},
+  {":=", BINOP_ASSIGN, PREC_ASSIGN, 1},
+  {"or", BINOP_BITWISE_IOR, PREC_BITWISE_IOR, 0},
+  {"xor", BINOP_BITWISE_XOR, PREC_BITWISE_XOR, 0},
+  {"and", BINOP_BITWISE_AND, PREC_BITWISE_AND, 0},
+  {"=", BINOP_EQUAL, PREC_EQUAL, 0},
+  {"<>", BINOP_NOTEQUAL, PREC_EQUAL, 0},
+  {"<=", BINOP_LEQ, PREC_ORDER, 0},
+  {">=", BINOP_GEQ, PREC_ORDER, 0},
+  {">", BINOP_GTR, PREC_ORDER, 0},
+  {"<", BINOP_LESS, PREC_ORDER, 0},
+  {"shr", BINOP_RSH, PREC_SHIFT, 0},
+  {"shl", BINOP_LSH, PREC_SHIFT, 0},
+  {"+", BINOP_ADD, PREC_ADD, 0},
+  {"-", BINOP_SUB, PREC_ADD, 0},
+  {"*", BINOP_MUL, PREC_MUL, 0},
+  {"/", BINOP_DIV, PREC_MUL, 0},
+  {"div", BINOP_INTDIV, PREC_MUL, 0},
+  {"mod", BINOP_REM, PREC_MUL, 0},
+  {"@", BINOP_REPEAT, PREC_REPEAT, 0},
+  {"-", UNOP_NEG, PREC_PREFIX, 0},
+  {"not", UNOP_LOGICAL_NOT, PREC_PREFIX, 0},
+  {"^", UNOP_IND, PREC_SUFFIX, 1},
+  {"@", UNOP_ADDR, PREC_PREFIX, 0},
+  {"sizeof", UNOP_SIZEOF, PREC_PREFIX, 0},
+  {NULL, 0, 0, 0}
+};
+
+struct type **const /* CONST_PTR v 4.17 */ (pascal_builtin_types[]) =
+{
+  &builtin_type_int,
+    &builtin_type_long,
+    &builtin_type_short,
+    &builtin_type_char,
+    &builtin_type_float,
+    &builtin_type_double,
+    &builtin_type_void,
+    &builtin_type_long_long,
+    &builtin_type_signed_char,
+    &builtin_type_unsigned_char,
+    &builtin_type_unsigned_short,
+    &builtin_type_unsigned_int,
+    &builtin_type_unsigned_long,
+    &builtin_type_unsigned_long_long,
+    &builtin_type_long_double,
+    &builtin_type_complex,
+    &builtin_type_double_complex,
+    0
+};
+
+const struct language_defn pascal_language_defn =
+{
+  "pascal",			/* Language name */
+  language_pascal,
+  pascal_builtin_types,
+  range_check_on,
+  type_check_on,
+  pascal_parse,
+  pascal_error,
+  evaluate_subexp_standard,
+  pascal_printchar,		/* Print a character constant */
+  pascal_printstr,		/* Function to print string constant */
+  pascal_emit_char,		/* Print a single char */
+  pascal_create_fundamental_type,	/* Create fundamental type in this language */
+  pascal_print_type,		/* Print a type using appropriate syntax */
+  pascal_val_print,		/* Print a value using appropriate syntax */
+  pascal_value_print,		/* Print a top-level value */
+  {"", "%", "b", ""},		/* Binary format info */
+  {"0%lo", "0", "o", ""},	/* Octal format info */
+  {"%ld", "", "d", ""},		/* Decimal format info */
+  {"$%lx", "$", "x", ""},	/* Hex format info */
+  pascal_op_print_tab,		/* expression operators for printing */
+  1,				/* c-style arrays */
+  0,				/* String lower bound */
+  &builtin_type_char,		/* Type of string elements */
+  LANG_MAGIC
+};
+
+void
+_initialize_pascal_language ()
+{
+  add_language (&pascal_language_defn);
+}