156 lines
3.6 KiB
C
156 lines
3.6 KiB
C
/* gen-protos.c - massages a list of prototypes, for use by fixproto.
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Copyright (C) 1993, 1994 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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#include <stdio.h>
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#include <ctype.h>
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#include "hconfig.h"
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#include "scan.h"
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#define HASH_SIZE 2503 /* a prime */
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int hash_tab[HASH_SIZE];
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int verbose = 0;
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sstring linebuf;
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/* Avoid error if config defines abort as fancy_abort.
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It's not worth "really" implementing this because ordinary
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compiler users never run fix-header. */
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void
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fancy_abort ()
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{
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abort ();
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}
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int
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main (argc, argv)
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int argc;
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char** argv;
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{
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FILE *inf = stdin;
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FILE *outf = stdout;
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int next_index = 0;
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int i, i0;
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fprintf (outf, "struct fn_decl std_protos[] = {\n");
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for (;;)
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{
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int c = skip_spaces (inf, ' ');
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int param_nesting = 1;
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char *param_start, *param_end, *decl_start,
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*name_start, *name_end;
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register char *ptr;
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if (c == EOF)
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break;
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linebuf.ptr = linebuf.base;
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ungetc (c, inf);
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c = read_upto (inf, &linebuf, '\n');
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if (linebuf.base[0] == '#') /* skip cpp command */
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continue;
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if (linebuf.base[0] == '\0') /* skip empty line */
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continue;
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ptr = linebuf.ptr - 1;
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while (*ptr == ' ' || *ptr == '\t') ptr--;
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if (*ptr-- != ';')
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{
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fprintf (stderr, "Funny input line: %s\n", linebuf.base);
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continue;
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}
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while (*ptr == ' ' || *ptr == '\t') ptr--;
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if (*ptr != ')')
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{
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fprintf (stderr, "Funny input line: %s\n", linebuf.base);
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continue;
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}
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param_end = ptr;
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for (;;)
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{
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int c = *--ptr;
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if (c == '(' && --param_nesting == 0)
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break;
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else if (c == ')')
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param_nesting++;
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}
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param_start = ptr+1;
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ptr--;
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while (*ptr == ' ' || *ptr == '\t') ptr--;
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if (!isalnum (*ptr))
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{
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if (verbose)
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fprintf (stderr, "%s: Can't handle this complex prototype: %s\n",
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argv[0], linebuf.base);
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continue;
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}
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name_end = ptr+1;
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while (isalnum (*ptr) || *ptr == '_') --ptr;
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name_start = ptr+1;
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while (*ptr == ' ' || *ptr == '\t') ptr--;
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ptr[1] = 0;
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*name_end = 0;
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*param_end = 0;
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*name_end = 0;
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decl_start = linebuf.base;
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if (strncmp (decl_start, "typedef ", 8) == 0)
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continue;
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if (strncmp (decl_start, "extern ", 7) == 0)
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decl_start += 7;
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/* NOTE: If you edit this,
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also edit lookup_std_proto in fix-header.c !! */
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i = hash (name_start) % HASH_SIZE;
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i0 = i;
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if (hash_tab[i] != 0)
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{
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for (;;)
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{
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i = (i+1) % HASH_SIZE;
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if (i == i0)
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abort ();
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if (hash_tab[i] == 0)
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break;
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}
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}
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hash_tab[i] = next_index;
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fprintf (outf, " {\"%s\", \"%s\", \"%s\" },\n",
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name_start, decl_start, param_start);
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next_index++;
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if (c == EOF)
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break;
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}
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fprintf (outf, "{0, 0, 0}\n};\n");
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fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE);
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fprintf (outf, "short hash_tab[HASH_SIZE] = {\n");
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for (i = 0; i < HASH_SIZE; i++)
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fprintf (outf, " %d,\n", hash_tab[i]);
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fprintf (outf, "};\n");
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return 0;
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}
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