1/* gen-protos.c - massages a list of prototypes, for use by fixproto. 2 Copyright (C) 1993, 94-96, 1998 Free Software Foundation, Inc. 3 4This program is free software; you can redistribute it and/or modify it 5under the terms of the GNU General Public License as published by the 6Free Software Foundation; either version 2, or (at your option) any 7later version. 8 9This program is distributed in the hope that it will be useful, 10but WITHOUT ANY WARRANTY; without even the implied warranty of 11MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 12GNU General Public License for more details. 13 14You should have received a copy of the GNU General Public License 15along with this program; if not, write to the Free Software 16Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ 17 18#include "hconfig.h" 19#include "system.h" 20#include "scan.h" 21#include "cpplib.h" 22#include "cpphash.h" 23#undef abort 24 25int verbose = 0; 26char *progname; 27 28#define HASH_SIZE 2503 /* a prime */ 29int hash_tab[HASH_SIZE]; 30int next_index; 31 32static void 33add_hash (fname) 34 char *fname; 35{ 36 int i, i0; 37 38 /* NOTE: If you edit this, also edit lookup_std_proto in fix-header.c !! */ 39 i = hashf (fname, strlen (fname), HASH_SIZE); 40 i0 = i; 41 if (hash_tab[i] != 0) 42 { 43 for (;;) 44 { 45 i = (i+1) % HASH_SIZE; 46 if (i == i0) 47 abort (); 48 if (hash_tab[i] == 0) 49 break; 50 } 51 } 52 hash_tab[i] = next_index; 53 54 next_index++; 55} 56 57/* Given a function prototype, fill in the fields of FN. 58 The result is a boolean indicating if a function prototype was found. 59 60 The input string is modified (trailing NULs are inserted). 61 The fields of FN point to the input string. */ 62 63static int 64parse_fn_proto (start, end, fn) 65 char *start, *end; 66 struct fn_decl *fn; 67{ 68 register char *ptr; 69 int param_nesting = 1; 70 char *param_start, *param_end, *decl_start, *name_start, *name_end; 71 72 ptr = end - 1; 73 while (*ptr == ' ' || *ptr == '\t') ptr--; 74 if (*ptr-- != ';') 75 { 76 fprintf (stderr, "Funny input line: %s\n", start); 77 return 0; 78 } 79 while (*ptr == ' ' || *ptr == '\t') ptr--; 80 if (*ptr != ')') 81 { 82 fprintf (stderr, "Funny input line: %s\n", start); 83 return 0; 84 } 85 param_end = ptr; 86 for (;;) 87 { 88 int c = *--ptr; 89 if (c == '(' && --param_nesting == 0) 90 break; 91 else if (c == ')') 92 param_nesting++; 93 } 94 param_start = ptr+1; 95 96 ptr--; 97 while (*ptr == ' ' || *ptr == '\t') ptr--; 98 99 if (!ISALNUM ((unsigned char)*ptr)) 100 { 101 if (verbose) 102 fprintf (stderr, "%s: Can't handle this complex prototype: %s\n", 103 progname, start); 104 return 0; 105 } 106 name_end = ptr+1; 107 108 while (ISALNUM ((unsigned char)*ptr) || *ptr == '_') --ptr; 109 name_start = ptr+1; 110 while (*ptr == ' ' || *ptr == '\t') ptr--; 111 ptr[1] = 0; 112 *param_end = 0; 113 *name_end = 0; 114 115 decl_start = start; 116 if (strncmp (decl_start, "typedef ", 8) == 0) 117 return 0; 118 if (strncmp (decl_start, "extern ", 7) == 0) 119 decl_start += 7; 120 121 fn->fname = name_start; 122 fn->rtype = decl_start; 123 fn->params = param_start; 124 return 1; 125} 126 127int 128main (argc, argv) 129 int argc ATTRIBUTE_UNUSED; 130 char **argv; 131{ 132 FILE *inf = stdin; 133 FILE *outf = stdout; 134 int i; 135 sstring linebuf; 136 struct fn_decl fn_decl; 137 138 i = strlen (argv[0]); 139 while (i > 0 && argv[0][i-1] != '/') --i; 140 progname = &argv[0][i]; 141 142 INIT_SSTRING (&linebuf); 143 144 fprintf (outf, "struct fn_decl std_protos[] = {\n"); 145 146 /* A hash table entry of 0 means "unused" so reserve it. */ 147 fprintf (outf, " {\"\", \"\", \"\", 0},\n"); 148 next_index = 1; 149 150 for (;;) 151 { 152 int c = skip_spaces (inf, ' '); 153 154 if (c == EOF) 155 break; 156 linebuf.ptr = linebuf.base; 157 ungetc (c, inf); 158 c = read_upto (inf, &linebuf, '\n'); 159 if (linebuf.base[0] == '#') /* skip cpp command */ 160 continue; 161 if (linebuf.base[0] == '\0') /* skip empty line */ 162 continue; 163 164 if (! parse_fn_proto (linebuf.base, linebuf.ptr, &fn_decl)) 165 continue; 166 167 add_hash (fn_decl.fname); 168 169 fprintf (outf, " {\"%s\", \"%s\", \"%s\", 0},\n", 170 fn_decl.fname, fn_decl.rtype, fn_decl.params); 171 172 if (c == EOF) 173 break; 174 } 175 fprintf (outf, " {0, 0, 0, 0}\n};\n"); 176 177 178 fprintf (outf, "#define HASH_SIZE %d\n", HASH_SIZE); 179 fprintf (outf, "short hash_tab[HASH_SIZE] = {\n"); 180 for (i = 0; i < HASH_SIZE; i++) 181 fprintf (outf, " %d,\n", hash_tab[i]); 182 fprintf (outf, "};\n"); 183 184 return 0; 185} 186