/*
 * Copyright (c) 2007, 2010 Genome Research Ltd.
 * Author(s): James Bonfield
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *    1. Redistributions of source code must retain the above copyright notice,
 *       this list of conditions and the following disclaimer.
 * 
 *    2. Redistributions in binary form must reproduce the above
 *       copyright notice, this list of conditions and the following
 *       disclaimer in the documentation and/or other materials provided
 *       with the distribution.
 * 
 *    3. Neither the names Genome Research Ltd and Wellcome Trust Sanger
 *    Institute nor the names of its contributors may be used to endorse
 *    or promote products derived from this software without specific
 *    prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY GENOME RESEARCH LTD AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL GENOME RESEARCH
 * LTD OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Author(s): James Bonfield
 * 
 * Copyright (c) 1994-1996, 1999, 2001 MEDICAL RESEARCH COUNCIL
 * All rights reserved
 * 
 * Redistribution and use in source and binary forms, with or without 
 * modification, are permitted provided that the following conditions are met:
 * 
 *    1 Redistributions of source code must retain the above copyright notice, 
 *      this list of conditions and the following disclaimer.
 * 
 *    2 Redistributions in binary form must reproduce the above copyright
 *      notice, this list of conditions and the following disclaimer in
 *      the documentation and/or other materials provided with the
 *      distribution.
 * 
 *    3 Neither the name of the MEDICAL RESEARCH COUNCIL, THE LABORATORY OF
 *      MOLECULAR BIOLOGY nor the names of its contributors may be used
 *      to endorse or promote products derived from this software without
 *      specific prior written permission.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

/*
 * Copyright (c) Medical Research Council 1994. All rights reserved.
 *
 * Permission to use, copy, modify and distribute this software and its
 * documentation for any purpose is hereby granted without fee, provided that
 * this copyright and notice appears in all copies.
 *
 * This file was written by James Bonfield, Simon Dear, Rodger Staden,
 * as part of the Staden Package at the MRC Laboratory of Molecular
 * Biology, Hills Road, Cambridge, CB2 2QH, United Kingdom.
 *
 * MRC disclaims all warranties with regard to this software.
 */

/*
 * Our own memory alloc routines that output error messages as appropriate
 * for us. Could also be done as macros, but hopefully there are no tight
 * using malloc many times so efficiency shouldn't be a problem.
 *
 * This also allows for dropping in a debugging malloc as we're intercepting
 * all alloc & free commands.
 */

#ifdef HAVE_CONFIG_H
#include "io_lib_config.h"
#endif

#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include "io_lib/error.h"

void *xmalloc(size_t size) {
    void *c = malloc(size);
    
    if (NULL == c) {
	errout("Not enough memory.\n");
	return NULL;
    }

    return c;
}

void *xrealloc(void *ptr, size_t size) {
    void *c;

    /*
     * realloc _should_ allocate memory for us when ptr is NULL.
     * Unfortunately this is not the case with the non-ANSI conformant
     * C library provided with SunOS4.1
     */
    if (ptr)
	c = realloc(ptr, size);
    else
	c = malloc(size);
    
    if (NULL == c) {
	errout("Not enough memory.\n");
	return NULL;
    }

    return c;
}

void *xcalloc(size_t num, size_t size) {
    void *c = calloc(num, size);

    if (NULL == c) {
	errout("Not enough memory.\n");
	return NULL;
    }

    return c;
}

void xfree(void *ptr) {
    free(ptr);
}