#ifdef CURLDEBUG
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2004, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id: memdebug.c,v 1.46 2004/10/13 19:11:46 giva Exp $
 ***************************************************************************/

#include "setup.h"

#include <curl/curl.h>

#ifdef HAVE_SYS_SOCKET_H
#include <sys/socket.h>
#endif

#define _MPRINTF_REPLACE
#include <curl/mprintf.h>
#include "urldata.h"
#include <stdio.h>
#include <string.h>
#include <stdlib.h>

#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif

#define MEMDEBUG_NODEFINES /* don't redefine the standard functions */
#include "memory.h"
#include "memdebug.h"

struct memdebug {
	size_t size;
	double mem[1];
	/* I'm hoping this is the thing with the strictest alignment
	 * requirements.  That also means we waste some space :-( */
};

/*
 * Note that these debug functions are very simple and they are meant to
 * remain so. For advanced analysis, record a log file and write perl scripts
 * to analyze them!
 *
 * Don't use these with multithreaded test programs!
 */

#define logfile curl_debuglogfile
FILE *curl_debuglogfile;
static bool memlimit; /* enable memory limit */
static long memsize;  /* set number of mallocs allowed */

/* this sets the log file name */
void curl_memdebug( const char *logname ) {
	if ( logname ) {
		logfile = fopen( logname, "w" );
	} else {
		logfile = stderr;
	}
}

/* This function sets the number of malloc() calls that should return
   successfully! */
void curl_memlimit( long limit ) {
	memlimit = TRUE;
	memsize = limit;
}

/* returns TRUE if this isn't allowed! */
static bool countcheck( const char *func, int line, const char *source ) {
	/* if source is NULL, then the call is made internally and this check
	   should not be made */
	if ( memlimit && source ) {
		if ( !memsize ) {
			if ( logfile && source ) {
				fprintf( logfile, "LIMIT %s:%d %s reached memlimit\n",
						 source, line, func );
			}
			if ( source ) {
				fprintf( stderr, "LIMIT %s:%d %s reached memlimit\n",
						 source, line, func );
			}
			errno = ENOMEM;
			return TRUE; /* RETURN ERROR! */
		} else {
			memsize--; /* countdown */

		}
		/* log the countdown */
		if ( logfile && source ) {
			fprintf( logfile, "LIMIT %s:%d %ld ALLOCS left\n",
					 source, line, memsize );
		}

	}

	return FALSE; /* allow this */
}

void *curl_domalloc( size_t wantedsize, int line, const char *source ) {
	struct memdebug *mem;
	size_t size;

	if ( countcheck( "malloc", line, source ) ) {
		return NULL;
	}

	/* alloc at least 64 bytes */
	size = sizeof( struct memdebug ) + wantedsize;

	mem = (struct memdebug *)( Curl_cmalloc ) ( size );
	if ( mem ) {
		/* fill memory with junk */
		memset( mem->mem, 0xA5, wantedsize );
		mem->size = wantedsize;
	}

	if ( logfile && source ) {
		fprintf( logfile, "MEM %s:%d malloc(%zd) = %p\n",
				 source, line, wantedsize, mem ? mem->mem : 0 );
	}
	return ( mem ? mem->mem : NULL );
}

void *curl_docalloc( size_t wanted_elements, size_t wanted_size,
					 int line, const char *source ) {
	struct memdebug *mem;
	size_t size, user_size;

	if ( countcheck( "calloc", line, source ) ) {
		return NULL;
	}

	/* alloc at least 64 bytes */
	user_size = wanted_size * wanted_elements;
	size = sizeof( struct memdebug ) + user_size;

	mem = (struct memdebug *)( Curl_cmalloc ) ( size );
	if ( mem ) {
		/* fill memory with zeroes */
		memset( mem->mem, 0, user_size );
		mem->size = user_size;
	}

	if ( logfile && source ) {
		fprintf( logfile, "MEM %s:%d calloc(%u,%u) = %p\n",
				 source, line, wanted_elements, wanted_size, mem ? mem->mem : 0 );
	}
	return ( mem ? mem->mem : NULL );
}

char *curl_dostrdup( const char *str, int line, const char *source ) {
	char *mem;
	size_t len;

	curlassert( str != NULL );

	if ( countcheck( "strdup", line, source ) ) {
		return NULL;
	}

	len = strlen( str ) + 1;

	mem = curl_domalloc( len, 0, NULL ); /* NULL prevents logging */
	if ( mem ) {
		memcpy( mem, str, len );
	}

	if ( logfile ) {
		fprintf( logfile, "MEM %s:%d strdup(%p) (%zd) = %p\n",
				 source, line, str, len, mem );
	}

	return mem;
}

/* We provide a realloc() that accepts a NULL as pointer, which then
   performs a malloc(). In order to work with ares. */
void *curl_dorealloc( void *ptr, size_t wantedsize,
					  int line, const char *source ) {
	struct memdebug *mem = NULL;

	size_t size = sizeof( struct memdebug ) + wantedsize;

	if ( countcheck( "realloc", line, source ) ) {
		return NULL;
	}

	if ( ptr ) {
		mem = (struct memdebug *)( (char *)ptr - offsetof( struct memdebug, mem ) );
	}

	mem = (struct memdebug *)( Curl_crealloc ) ( mem, size );
	if ( logfile ) {
		fprintf( logfile, "MEM %s:%d realloc(0x%x, %zd) = %p\n",
				 source, line, ptr, wantedsize, mem ? mem->mem : NULL );
	}

	if ( mem ) {
		mem->size = wantedsize;
		return mem->mem;
	}

	return NULL;
}

void curl_dofree( void *ptr, int line, const char *source ) {
	struct memdebug *mem;

	curlassert( ptr != NULL );

	mem = (struct memdebug *)( (char *)ptr - offsetof( struct memdebug, mem ) );

	/* destroy  */
	memset( mem->mem, 0x13, mem->size );

	/* free for real */
	(Curl_cfree)( mem );

	if ( logfile ) {
		fprintf( logfile, "MEM %s:%d free(%p)\n", source, line, ptr );
	}
}

int curl_socket( int domain, int type, int protocol, int line,
				 const char *source ) {
	int sockfd = (socket)( domain, type, protocol );
	if ( logfile && ( sockfd != -1 ) ) {
		fprintf( logfile, "FD %s:%d socket() = %d\n",
				 source, line, sockfd );
	}
	return sockfd;
}

int curl_accept( int s, void *saddr, void *saddrlen,
				 int line, const char *source ) {
	struct sockaddr *addr = (struct sockaddr *)saddr;
	socklen_t *addrlen = (socklen_t *)saddrlen;
	int sockfd = (accept)( s, addr, addrlen );
	if ( logfile ) {
		fprintf( logfile, "FD %s:%d accept() = %d\n",
				 source, line, sockfd );
	}
	return sockfd;
}

/* this is our own defined way to close sockets on *ALL* platforms */
int curl_sclose( int sockfd, int line, const char *source ) {
	int res = sclose( sockfd );
	if ( logfile ) {
		fprintf( logfile, "FD %s:%d sclose(%d)\n",
				 source, line, sockfd );
	}
	return res;
}

FILE *curl_fopen( const char *file, const char *mode,
				  int line, const char *source ) {
	FILE *res = (fopen)( file, mode );
	if ( logfile ) {
		fprintf( logfile, "FILE %s:%d fopen(\"%s\",\"%s\") = %p\n",
				 source, line, file, mode, res );
	}
	return res;
}

int curl_fclose( FILE *file, int line, const char *source ) {
	int res;

	curlassert( file != NULL );

	res = (fclose)( file );
	if ( logfile ) {
		fprintf( logfile, "FILE %s:%d fclose(%p)\n",
				 source, line, file );
	}
	return res;
}
#else
#ifdef VMS
int VOID_VAR_MEMDEBUG;
#else
/* we provide a fake do-nothing function here to avoid compiler warnings */
void curl_memdebug( void ) {}
#endif /* VMS */
#endif /* CURLDEBUG */