1 /* gen-protos.c - massages a list of prototypes, for use by fixproto.
2 Copyright (C) 1993, 94-96, 1998 Free Software Foundation, Inc.
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
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.
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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
20 #include "gansidecl.h"
28 #define HASH_SIZE 2503 /* a prime */
29 int hash_tab[HASH_SIZE];
33 hashf (name, len, hashsize)
34 register const U_CHAR *name;
41 r = HASHSTEP (r, *name++);
43 return MAKE_POS (r) % hashsize;
52 /* NOTE: If you edit this, also edit lookup_std_proto in fix-header.c !! */
53 i = hashf (fname, strlen (fname), HASH_SIZE);
59 i = (i+1) % HASH_SIZE;
66 hash_tab[i] = next_index;
71 /* Given a function prototype, fill in the fields of FN.
72 The result is a boolean indicating if a function prototype was found.
74 The input string is modified (trailing NULs are inserted).
75 The fields of FN point to the input string. */
78 parse_fn_proto (start, end, fn)
83 int param_nesting = 1;
84 char *param_start, *param_end, *decl_start, *name_start, *name_end;
87 while (*ptr == ' ' || *ptr == '\t') ptr--;
90 fprintf (stderr, "Funny input line: %s\n", start);
93 while (*ptr == ' ' || *ptr == '\t') ptr--;
96 fprintf (stderr, "Funny input line: %s\n", start);
103 if (c == '(' && --param_nesting == 0)
111 while (*ptr == ' ' || *ptr == '\t') ptr--;
116 fprintf (stderr, "%s: Can't handle this complex prototype: %s\n",
122 while (ISALNUM (*ptr) || *ptr == '_') --ptr;
124 while (*ptr == ' ' || *ptr == '\t') ptr--;
130 if (strncmp (decl_start, "typedef ", 8) == 0)
132 if (strncmp (decl_start, "extern ", 7) == 0)
135 fn->fname = name_start;
136 fn->rtype = decl_start;
137 fn->params = param_start;
150 struct fn_decl fn_decl;
152 i = strlen (argv[0]);
153 while (i > 0 && argv[0][i-1] != '/') --i;
154 progname = &argv[0][i];
156 INIT_SSTRING (&linebuf);
158 fprintf (outf, "struct fn_decl std_protos[] = {\n");
160 /* A hash table entry of 0 means "unused" so reserve it. */
161 fprintf (outf, " {\"\", \"\", \"\"},\n");
166 int c = skip_spaces (inf, ' ');
170 linebuf.ptr = linebuf.base;
172 c = read_upto (inf, &linebuf, '\n');
173 if (linebuf.base[0] == '#') /* skip cpp command */
175 if (linebuf.base[0] == '\0') /* skip empty line */
178 if (! parse_fn_proto (linebuf.base, linebuf.ptr, &fn_decl))
181 add_hash (fn_decl.fname);
183 fprintf (outf, " {\"%s\", \"%s\", \"%s\"},\n",
184 fn_decl.fname, fn_decl.rtype, fn_decl.params);
189 fprintf (outf, " {0, 0, 0}\n};\n");
192 fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE);
193 fprintf (outf, "short hash_tab[HASH_SIZE] = {\n");
194 for (i = 0; i < HASH_SIZE; i++)
195 fprintf (outf, " %d,\n", hash_tab[i]);
196 fprintf (outf, "};\n");
201 /* Avoid error if config defines abort as fancy_abort.
202 It's not worth "really" implementing this because ordinary
203 compiler users never run fix-header. */
215 fprintf (stderr, "%s: %s\n", "gen-protos", s);
216 exit (FATAL_EXIT_CODE);