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7936052f PB |
1 | /* gen-protos.c - massages a list of prototypes, for use by fixproto. |
2 | Copyright (C) 1993 Free Software Foundation, Inc. | |
3 | ||
4 | This program is free software; you can redistribute it and/or modify it | |
5 | under the terms of the GNU General Public License as published by the | |
6 | Free Software Foundation; either version 2, or (at your option) any | |
7 | later version. | |
8 | ||
9 | This program is distributed in the hope that it will be useful, | |
10 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | GNU General Public License for more details. | |
13 | ||
14 | You should have received a copy of the GNU General Public License | |
15 | along with this program; if not, write to the Free Software | |
16 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ | |
17 | ||
18 | #include <stdio.h> | |
19 | #include "scan.h" | |
20 | ||
21 | #define HASH_SIZE 2503 /* a prime */ | |
22 | ||
23 | int hash_tab[HASH_SIZE]; | |
24 | ||
25 | sstring linebuf; | |
26 | ||
27 | int | |
28 | main (argc, argv) | |
29 | int argc; | |
30 | char** argv; | |
31 | { | |
32 | FILE *inf = stdin; | |
33 | FILE *outf = stdout; | |
34 | int next_index = 0; | |
35 | int i, i0; | |
36 | ||
37 | fprintf (outf, "struct fn_decl std_protos[] = {\n"); | |
38 | ||
39 | for (;;) | |
40 | { | |
41 | int c = skip_spaces (inf, ' '); | |
42 | int param_nesting = 1; | |
43 | char *param_start, *param_end, *decl_start, | |
44 | *name_start, *name_end; | |
45 | register char *ptr; | |
46 | if (c == EOF) | |
47 | break; | |
48 | linebuf.ptr = linebuf.base; | |
49 | ungetc (c, inf); | |
50 | c = read_upto (inf, &linebuf, '\n'); | |
51 | if (linebuf.base[0] == '#') /* skip cpp command */ | |
52 | continue; | |
53 | if (linebuf.base[0] == '\0') /* skip empty line */ | |
54 | continue; | |
55 | ||
56 | ptr = linebuf.ptr - 1; | |
57 | while (*ptr == ' ' || *ptr == '\t') ptr--; | |
58 | if (*ptr-- != ';') | |
59 | { | |
60 | fprintf (stderr, "Funny input line: %s\n", linebuf.base); | |
61 | continue; | |
62 | } | |
63 | while (*ptr == ' ' || *ptr == '\t') ptr--; | |
64 | if (*ptr != ')') | |
65 | { | |
66 | fprintf (stderr, "Funny input line: %s\n", linebuf.base); | |
67 | continue; | |
68 | } | |
69 | param_end = ptr; | |
70 | for (;;) | |
71 | { | |
72 | int c = *--ptr; | |
73 | if (c == '(' && --param_nesting == 0) | |
74 | break; | |
75 | else if (c == ')') | |
76 | param_nesting++; | |
77 | } | |
78 | param_start = ptr+1; | |
79 | ||
80 | ptr--; | |
81 | while (*ptr == ' ' || *ptr == '\t') ptr--; | |
82 | ||
83 | if (!isalnum (*ptr)) | |
84 | { | |
85 | fprintf (stderr, "%s: Can't handle this complex prototype: %s\n", | |
86 | argv[0], linebuf.base); | |
87 | continue; | |
88 | } | |
89 | name_end = ptr+1; | |
90 | ||
91 | while (isalnum (*ptr) || *ptr == '_') --ptr; | |
92 | name_start = ptr+1; | |
93 | while (*ptr == ' ' || *ptr == '\t') ptr--; | |
94 | ptr[1] = 0; | |
95 | *name_end = 0; | |
96 | *param_end = 0; | |
97 | *name_end = 0; | |
98 | ||
99 | decl_start = linebuf.base; | |
100 | if (strncmp (decl_start, "typedef ", 8) == 0) | |
101 | continue; | |
102 | if (strncmp (decl_start, "extern ", 7) == 0) | |
103 | decl_start += 7; | |
104 | ||
105 | ||
106 | /* NOTE: If you edit this, | |
107 | also edit lookup_std_proto in patch-header.c !! */ | |
108 | i = hash(name_start) % HASH_SIZE; | |
109 | i0 = i; | |
110 | if (hash_tab[i] != 0) | |
111 | { | |
112 | for (;;) | |
113 | { | |
114 | i = (i+1) % HASH_SIZE; | |
115 | if (i == i0) | |
116 | abort(); | |
117 | if (hash_tab[i] == 0) | |
118 | break; | |
119 | } | |
120 | } | |
121 | hash_tab[i] = next_index; | |
122 | ||
123 | fprintf (outf, " {\"%s\", \"%s\", \"%s\" }, /* ix: %d, i0: %d */\n", | |
124 | name_start, decl_start, param_start, i, i0); | |
125 | ||
126 | next_index++; | |
127 | ||
128 | if (c == EOF) | |
129 | break; | |
130 | } | |
131 | fprintf (outf, "{0, 0, 0}\n};\n"); | |
132 | ||
133 | ||
134 | fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE); | |
135 | fprintf (outf, "short hash_tab[HASH_SIZE] = {\n"); | |
136 | for (i = 0; i < HASH_SIZE; i++) | |
137 | fprintf (outf, " %d,\n", hash_tab[i]); | |
138 | fprintf (outf, "};\n"); | |
139 | ||
140 | return 0; | |
141 | } |