1 /* 2 * Copyright (c) 1997 - 2005 Kungliga Tekniska H�gskolan 3 * (Royal Institute of Technology, Stockholm, Sweden). 4 * All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 17 * 3. Neither the name of the Institute nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 */ 33 34 #include "gen_locl.h" 35 #include "lex.h" 36 37 RCSID("$Id: symbol.c 15617 2005-07-12 06:27:42Z lha $"); 38 39 static Hashtab *htab; 40 41 static int 42 cmp(void *a, void *b) 43 { 44 Symbol *s1 = (Symbol *) a; 45 Symbol *s2 = (Symbol *) b; 46 47 return strcmp(s1->name, s2->name); 48 } 49 50 static unsigned 51 hash(void *a) 52 { 53 Symbol *s = (Symbol *) a; 54 55 return hashjpw(s->name); 56 } 57 58 void 59 initsym(void) 60 { 61 htab = hashtabnew(101, cmp, hash); 62 } 63 64 65 void 66 output_name(char *s) 67 { 68 char *p; 69 70 for (p = s; *p; ++p) 71 if (*p == '-') 72 *p = '_'; 73 } 74 75 Symbol * 76 addsym(char *name) 77 { 78 Symbol key, *s; 79 80 key.name = name; 81 s = (Symbol *) hashtabsearch(htab, (void *) &key); 82 if (s == NULL) { 83 s = (Symbol *) emalloc(sizeof(*s)); 84 s->name = name; 85 s->gen_name = estrdup(name); 86 output_name(s->gen_name); 87 s->stype = SUndefined; 88 hashtabadd(htab, s); 89 } 90 return s; 91 } 92 93 static int 94 checkfunc(void *ptr, void *arg) 95 { 96 Symbol *s = ptr; 97 if (s->stype == SUndefined) { 98 error_message("%s is still undefined\n", s->name); 99 *(int *) arg = 1; 100 } 101 return 0; 102 } 103 104 int 105 checkundefined(void) 106 { 107 int f = 0; 108 hashtabforeach(htab, checkfunc, &f); 109 return f; 110 } 111