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