1/* 2 * libid3tag - ID3 tag manipulation library 3 * Copyright (C) 2000-2003 Underbit Technologies, Inc. 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 18 * 19 * $Id: debug.c,v 1.7 2003/04/19 00:14:33 rob Exp $ 20 */ 21 22# ifdef HAVE_CONFIG_H 23# include "config.h" 24# endif 25 26# include "global.h" 27 28# undef malloc 29# undef calloc 30# undef realloc 31# undef free 32 33# include <stdio.h> 34# include <stdlib.h> 35# include <string.h> 36 37# include "debug.h" 38 39# if defined(DEBUG) 40 41# define DEBUG_MAGIC 0xdeadbeefL 42 43struct debug { 44 char const *file; 45 unsigned int line; 46 size_t size; 47 struct debug *next; 48 struct debug *prev; 49 long int magic; 50}; 51 52static struct debug *allocated; 53static int registered; 54 55static 56void check(void) 57{ 58 struct debug *debug; 59 60 for (debug = allocated; debug; debug = debug->next) { 61 if (debug->magic != DEBUG_MAGIC) { 62 fprintf(stderr, "memory corruption\n"); 63 break; 64 } 65 66 fprintf(stderr, "%s:%u: leaked %lu bytes\n", 67 debug->file, debug->line, debug->size); 68 } 69} 70 71void *id3_debug_malloc(size_t size, char const *file, unsigned int line) 72{ 73 struct debug *debug; 74 75 if (!registered) { 76 atexit(check); 77 registered = 1; 78 } 79 80 if (size == 0) 81 fprintf(stderr, "%s:%u: malloc(0)\n", file, line); 82 83 debug = malloc(sizeof(*debug) + size); 84 if (debug == 0) { 85 fprintf(stderr, "%s:%u: malloc(%lu) failed\n", file, line, size); 86 return 0; 87 } 88 89 debug->magic = DEBUG_MAGIC; 90 91 debug->file = file; 92 debug->line = line; 93 debug->size = size; 94 95 debug->next = allocated; 96 debug->prev = 0; 97 98 if (allocated) 99 allocated->prev = debug; 100 101 allocated = debug; 102 103 return ++debug; 104} 105 106void *id3_debug_calloc(size_t nmemb, size_t size, 107 char const *file, unsigned int line) 108{ 109 void *ptr; 110 111 ptr = id3_debug_malloc(nmemb * size, file, line); 112 if (ptr) 113 memset(ptr, 0, nmemb * size); 114 115 return ptr; 116} 117 118void *id3_debug_realloc(void *ptr, size_t size, 119 char const *file, unsigned int line) 120{ 121 struct debug *debug, *new; 122 123 if (size == 0) { 124 id3_debug_free(ptr, file, line); 125 return 0; 126 } 127 128 if (ptr == 0) 129 return id3_debug_malloc(size, file, line); 130 131 debug = ptr; 132 --debug; 133 134 if (debug->magic != DEBUG_MAGIC) { 135 fprintf(stderr, "%s:%u: realloc(%p, %lu) memory not allocated\n", 136 file, line, ptr, size); 137 return 0; 138 } 139 140 new = realloc(debug, sizeof(*debug) + size); 141 if (new == 0) { 142 fprintf(stderr, "%s:%u: realloc(%p, %lu) failed\n", file, line, ptr, size); 143 return 0; 144 } 145 146 if (allocated == debug) 147 allocated = new; 148 149 debug = new; 150 151 debug->file = file; 152 debug->line = line; 153 debug->size = size; 154 155 if (debug->next) 156 debug->next->prev = debug; 157 if (debug->prev) 158 debug->prev->next = debug; 159 160 return ++debug; 161} 162 163void id3_debug_free(void *ptr, char const *file, unsigned int line) 164{ 165 struct debug *debug; 166 167 if (ptr == 0) { 168 fprintf(stderr, "%s:%u: free(0)\n", file, line); 169 return; 170 } 171 172 debug = ptr; 173 --debug; 174 175 if (debug->magic != DEBUG_MAGIC) { 176 fprintf(stderr, "%s:%u: free(%p) memory not allocated\n", file, line, ptr); 177 return; 178 } 179 180 debug->magic = 0; 181 182 if (debug->next) 183 debug->next->prev = debug->prev; 184 if (debug->prev) 185 debug->prev->next = debug->next; 186 187 if (allocated == debug) 188 allocated = debug->next; 189 190 free(debug); 191} 192 193void *id3_debug_release(void *ptr, char const *file, unsigned int line) 194{ 195 struct debug *debug; 196 197 if (ptr == 0) 198 return 0; 199 200 debug = ptr; 201 --debug; 202 203 if (debug->magic != DEBUG_MAGIC) { 204 fprintf(stderr, "%s:%u: release(%p) memory not allocated\n", 205 file, line, ptr); 206 return ptr; 207 } 208 209 if (debug->next) 210 debug->next->prev = debug->prev; 211 if (debug->prev) 212 debug->prev->next = debug->next; 213 214 if (allocated == debug) 215 allocated = debug->next; 216 217 memmove(debug, debug + 1, debug->size); 218 219 return debug; 220} 221 222# endif 223