1 /* 2 * Copyright (c) 1997 - 2005 Kungliga Tekniska Högskolan 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 static Hashtab *htab; 38 39 static int 40 cmp(void *a, void *b) 41 { 42 Symbol *s1 = (Symbol *) a; 43 Symbol *s2 = (Symbol *) b; 44 45 return strcmp(s1->name, s2->name); 46 } 47 48 static unsigned 49 hash(void *a) 50 { 51 Symbol *s = (Symbol *) a; 52 53 return hashjpw(s->name); 54 } 55 56 void 57 initsym(void) 58 { 59 htab = hashtabnew(101, cmp, hash); 60 } 61 62 63 void 64 output_name(char *s) 65 { 66 char *p; 67 68 for (p = s; *p; ++p) 69 if (*p == '-' || *p == '.') 70 *p = '_'; 71 } 72 73 Symbol * 74 addsym(char *name) 75 { 76 Symbol key, *s; 77 78 key.name = name; 79 s = (Symbol *) hashtabsearch(htab, (void *) &key); 80 if (s == NULL) { 81 s = (Symbol *) emalloc(sizeof(*s)); 82 s->name = name; 83 s->gen_name = estrdup(name); 84 output_name(s->gen_name); 85 s->stype = SUndefined; 86 hashtabadd(htab, s); 87 } 88 return s; 89 } 90 91 static int 92 checkfunc(void *ptr, void *arg) 93 { 94 Symbol *s = ptr; 95 if (s->stype == SUndefined) { 96 lex_error_message("%s is still undefined\n", s->name); 97 *(int *) arg = 1; 98 } 99 return 0; 100 } 101 102 int 103 checkundefined(void) 104 { 105 int f = 0; 106 hashtabforeach(htab, checkfunc, &f); 107 return f; 108 } 109