1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
|
/* gen-protos.c - massages a list of prototypes, for use by fixproto.
Copyright (C) 1993, 1994, 1995, 1996, 1998,
1999 Free Software Foundation, Inc.
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "hconfig.h"
#include "system.h"
#include "scan.h"
#undef abort
int verbose = 0;
const char *progname;
static void add_hash PARAMS ((const char *));
static int parse_fn_proto PARAMS ((char *, char *, struct fn_decl *));
#define HASH_SIZE 2503 /* a prime */
int hash_tab[HASH_SIZE];
int next_index;
int collisions;
static void
add_hash (fname)
const char *fname;
{
int i, i0;
/* NOTE: If you edit this, also edit lookup_std_proto in fix-header.c !! */
i = hashstr (fname, strlen (fname)) % HASH_SIZE;
i0 = i;
if (hash_tab[i] != 0)
{
collisions++;
for (;;)
{
i = (i+1) % HASH_SIZE;
if (i == i0)
abort ();
if (hash_tab[i] == 0)
break;
}
}
hash_tab[i] = next_index;
next_index++;
}
/* Given a function prototype, fill in the fields of FN.
The result is a boolean indicating if a function prototype was found.
The input string is modified (trailing NULs are inserted).
The fields of FN point to the input string. */
static int
parse_fn_proto (start, end, fn)
char *start, *end;
struct fn_decl *fn;
{
register char *ptr;
int param_nesting = 1;
char *param_start, *param_end, *decl_start, *name_start, *name_end;
ptr = end - 1;
while (*ptr == ' ' || *ptr == '\t') ptr--;
if (*ptr-- != ';')
{
fprintf (stderr, "Funny input line: %s\n", start);
return 0;
}
while (*ptr == ' ' || *ptr == '\t') ptr--;
if (*ptr != ')')
{
fprintf (stderr, "Funny input line: %s\n", start);
return 0;
}
param_end = ptr;
for (;;)
{
int c = *--ptr;
if (c == '(' && --param_nesting == 0)
break;
else if (c == ')')
param_nesting++;
}
param_start = ptr+1;
ptr--;
while (*ptr == ' ' || *ptr == '\t') ptr--;
if (!ISALNUM ((unsigned char)*ptr))
{
if (verbose)
fprintf (stderr, "%s: Can't handle this complex prototype: %s\n",
progname, start);
return 0;
}
name_end = ptr+1;
while (ISALNUM ((unsigned char)*ptr) || *ptr == '_') --ptr;
name_start = ptr+1;
while (*ptr == ' ' || *ptr == '\t') ptr--;
ptr[1] = 0;
*param_end = 0;
*name_end = 0;
decl_start = start;
if (strncmp (decl_start, "typedef ", 8) == 0)
return 0;
if (strncmp (decl_start, "extern ", 7) == 0)
decl_start += 7;
fn->fname = name_start;
fn->rtype = decl_start;
fn->params = param_start;
return 1;
}
extern int main PARAMS ((int, char **));
int
main (argc, argv)
int argc ATTRIBUTE_UNUSED;
char **argv;
{
FILE *inf = stdin;
FILE *outf = stdout;
int i;
sstring linebuf;
struct fn_decl fn_decl;
i = strlen (argv[0]);
while (i > 0 && argv[0][i-1] != '/') --i;
progname = &argv[0][i];
INIT_SSTRING (&linebuf);
fprintf (outf, "struct fn_decl std_protos[] = {\n");
/* A hash table entry of 0 means "unused" so reserve it. */
fprintf (outf, " {\"\", \"\", \"\", 0},\n");
next_index = 1;
for (;;)
{
int c = skip_spaces (inf, ' ');
if (c == EOF)
break;
linebuf.ptr = linebuf.base;
ungetc (c, inf);
c = read_upto (inf, &linebuf, '\n');
if (linebuf.base[0] == '#') /* skip cpp command */
continue;
if (linebuf.base[0] == '\0') /* skip empty line */
continue;
if (! parse_fn_proto (linebuf.base, linebuf.ptr, &fn_decl))
continue;
add_hash (fn_decl.fname);
fprintf (outf, " {\"%s\", \"%s\", \"%s\", 0},\n",
fn_decl.fname, fn_decl.rtype, fn_decl.params);
if (c == EOF)
break;
}
fprintf (outf, " {0, 0, 0, 0}\n};\n");
fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE);
fprintf (outf, "short hash_tab[HASH_SIZE] = {\n");
for (i = 0; i < HASH_SIZE; i++)
fprintf (outf, " %d,\n", hash_tab[i]);
fprintf (outf, "};\n");
fprintf (stderr, "gen-protos: %d entries %d collisions\n",
next_index, collisions);
return 0;
}
|
