cannam@85: /*
cannam@85:  * libid3tag - ID3 tag manipulation library
cannam@85:  * Copyright (C) 2000-2004 Underbit Technologies, Inc.
cannam@85:  *
cannam@85:  * This program is free software; you can redistribute it and/or modify
cannam@85:  * it under the terms of the GNU General Public License as published by
cannam@85:  * the Free Software Foundation; either version 2 of the License, or
cannam@85:  * (at your option) any later version.
cannam@85:  *
cannam@85:  * This program is distributed in the hope that it will be useful,
cannam@85:  * but WITHOUT ANY WARRANTY; without even the implied warranty of
cannam@85:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
cannam@85:  * GNU General Public License for more details.
cannam@85:  *
cannam@85:  * You should have received a copy of the GNU General Public License
cannam@85:  * along with this program; if not, write to the Free Software
cannam@85:  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
cannam@85:  *
cannam@85:  * $Id: debug.c,v 1.8 2004/01/23 09:41:32 rob Exp $
cannam@85:  */
cannam@85: 
cannam@85: # ifdef HAVE_CONFIG_H
cannam@85: #  include "config.h"
cannam@85: # endif
cannam@85: 
cannam@85: # include "global.h"
cannam@85: 
cannam@85: # undef malloc
cannam@85: # undef calloc
cannam@85: # undef realloc
cannam@85: # undef free
cannam@85: 
cannam@85: # include <stdio.h>
cannam@85: # include <stdlib.h>
cannam@85: # include <string.h>
cannam@85: 
cannam@85: # include "debug.h"
cannam@85: 
cannam@85: # if defined(DEBUG)
cannam@85: 
cannam@85: # define DEBUG_MAGIC  0xdeadbeefL
cannam@85: 
cannam@85: struct debug {
cannam@85:   char const *file;
cannam@85:   unsigned int line;
cannam@85:   size_t size;
cannam@85:   struct debug *next;
cannam@85:   struct debug *prev;
cannam@85:   long int magic;
cannam@85: };
cannam@85: 
cannam@85: static struct debug *allocated;
cannam@85: static int registered;
cannam@85: 
cannam@85: static
cannam@85: void check(void)
cannam@85: {
cannam@85:   struct debug *debug;
cannam@85: 
cannam@85:   for (debug = allocated; debug; debug = debug->next) {
cannam@85:     if (debug->magic != DEBUG_MAGIC) {
cannam@85:       fprintf(stderr, "memory corruption\n");
cannam@85:       break;
cannam@85:     }
cannam@85: 
cannam@85:     fprintf(stderr, "%s:%u: leaked %lu bytes\n",
cannam@85: 	    debug->file, debug->line, debug->size);
cannam@85:   }
cannam@85: }
cannam@85: 
cannam@85: void *id3_debug_malloc(size_t size, char const *file, unsigned int line)
cannam@85: {
cannam@85:   struct debug *debug;
cannam@85: 
cannam@85:   if (!registered) {
cannam@85:     atexit(check);
cannam@85:     registered = 1;
cannam@85:   }
cannam@85: 
cannam@85:   if (size == 0)
cannam@85:     fprintf(stderr, "%s:%u: malloc(0)\n", file, line);
cannam@85: 
cannam@85:   debug = malloc(sizeof(*debug) + size);
cannam@85:   if (debug == 0) {
cannam@85:     fprintf(stderr, "%s:%u: malloc(%lu) failed\n", file, line, size);
cannam@85:     return 0;
cannam@85:   }
cannam@85: 
cannam@85:   debug->magic = DEBUG_MAGIC;
cannam@85: 
cannam@85:   debug->file = file;
cannam@85:   debug->line = line;
cannam@85:   debug->size = size;
cannam@85: 
cannam@85:   debug->next = allocated;
cannam@85:   debug->prev = 0;
cannam@85: 
cannam@85:   if (allocated)
cannam@85:     allocated->prev = debug;
cannam@85: 
cannam@85:   allocated = debug;
cannam@85: 
cannam@85:   return ++debug;
cannam@85: }
cannam@85: 
cannam@85: void *id3_debug_calloc(size_t nmemb, size_t size,
cannam@85: 		       char const *file, unsigned int line)
cannam@85: {
cannam@85:   void *ptr;
cannam@85: 
cannam@85:   ptr = id3_debug_malloc(nmemb * size, file, line);
cannam@85:   if (ptr)
cannam@85:     memset(ptr, 0, nmemb * size);
cannam@85: 
cannam@85:   return ptr;
cannam@85: }
cannam@85: 
cannam@85: void *id3_debug_realloc(void *ptr, size_t size,
cannam@85: 			char const *file, unsigned int line)
cannam@85: {
cannam@85:   struct debug *debug, *new;
cannam@85: 
cannam@85:   if (size == 0) {
cannam@85:     id3_debug_free(ptr, file, line);
cannam@85:     return 0;
cannam@85:   }
cannam@85: 
cannam@85:   if (ptr == 0)
cannam@85:     return id3_debug_malloc(size, file, line);
cannam@85: 
cannam@85:   debug = ptr;
cannam@85:   --debug;
cannam@85: 
cannam@85:   if (debug->magic != DEBUG_MAGIC) {
cannam@85:     fprintf(stderr, "%s:%u: realloc(%p, %lu) memory not allocated\n",
cannam@85: 	    file, line, ptr, size);
cannam@85:     return 0;
cannam@85:   }
cannam@85: 
cannam@85:   new = realloc(debug, sizeof(*debug) + size);
cannam@85:   if (new == 0) {
cannam@85:     fprintf(stderr, "%s:%u: realloc(%p, %lu) failed\n", file, line, ptr, size);
cannam@85:     return 0;
cannam@85:   }
cannam@85: 
cannam@85:   if (allocated == debug)
cannam@85:     allocated = new;
cannam@85: 
cannam@85:   debug = new;
cannam@85: 
cannam@85:   debug->file = file;
cannam@85:   debug->line = line;
cannam@85:   debug->size = size;
cannam@85: 
cannam@85:   if (debug->next)
cannam@85:     debug->next->prev = debug;
cannam@85:   if (debug->prev)
cannam@85:     debug->prev->next = debug;
cannam@85: 
cannam@85:   return ++debug;
cannam@85: }
cannam@85: 
cannam@85: void id3_debug_free(void *ptr, char const *file, unsigned int line)
cannam@85: {
cannam@85:   struct debug *debug;
cannam@85: 
cannam@85:   if (ptr == 0) {
cannam@85:     fprintf(stderr, "%s:%u: free(0)\n", file, line);
cannam@85:     return;
cannam@85:   }
cannam@85: 
cannam@85:   debug = ptr;
cannam@85:   --debug;
cannam@85: 
cannam@85:   if (debug->magic != DEBUG_MAGIC) {
cannam@85:     fprintf(stderr, "%s:%u: free(%p) memory not allocated\n", file, line, ptr);
cannam@85:     return;
cannam@85:   }
cannam@85: 
cannam@85:   debug->magic = 0;
cannam@85: 
cannam@85:   if (debug->next)
cannam@85:     debug->next->prev = debug->prev;
cannam@85:   if (debug->prev)
cannam@85:     debug->prev->next = debug->next;
cannam@85: 
cannam@85:   if (allocated == debug)
cannam@85:     allocated = debug->next;
cannam@85: 
cannam@85:   free(debug);
cannam@85: }
cannam@85: 
cannam@85: void *id3_debug_release(void *ptr, char const *file, unsigned int line)
cannam@85: {
cannam@85:   struct debug *debug;
cannam@85: 
cannam@85:   if (ptr == 0)
cannam@85:     return 0;
cannam@85: 
cannam@85:   debug = ptr;
cannam@85:   --debug;
cannam@85: 
cannam@85:   if (debug->magic != DEBUG_MAGIC) {
cannam@85:     fprintf(stderr, "%s:%u: release(%p) memory not allocated\n",
cannam@85: 	    file, line, ptr);
cannam@85:     return ptr;
cannam@85:   }
cannam@85: 
cannam@85:   if (debug->next)
cannam@85:     debug->next->prev = debug->prev;
cannam@85:   if (debug->prev)
cannam@85:     debug->prev->next = debug->next;
cannam@85: 
cannam@85:   if (allocated == debug)
cannam@85:     allocated = debug->next;
cannam@85: 
cannam@85:   memmove(debug, debug + 1, debug->size);
cannam@85: 
cannam@85:   return debug;
cannam@85: }
cannam@85: 
cannam@85: # endif