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[/] [openrisc/] [trunk/] [gnu-src/] [gcc-4.2.2/] [gcc/] [gen-protos.c] - Rev 266
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/* gen-protos.c - massages a list of prototypes, for use by fixproto. Copyright (C) 1993, 1994, 1995, 1996, 1998, 1999, 2003, 2004, 2005, 2007 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 3, 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; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ #include "bconfig.h" #include "system.h" #include "coretypes.h" #include "tm.h" #include "scan.h" #include "errors.h" int verbose = 0; static void add_hash (const char *); static int parse_fn_proto (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 (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; gcc_assert (i != i0); 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 (char *start, char *end, struct fn_decl *fn) { 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 (ISIDNUM (*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; } int main (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]; /* Unlock the stdio streams. */ unlock_std_streams (); 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; }
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