#ifndef lint
static const char	RCSid[] = "$Id: ealloc.c,v 2.2 2003/02/22 02:07:22 greg Exp $";
#endif
/*
 *  ealloc.c - memory routines which call quit on error.
 */

/* ====================================================================
 * The Radiance Software License, Version 1.0
 *
 * Copyright (c) 1990 - 2002 The Regents of the University of California,
 * through Lawrence Berkeley National Laboratory.   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. The end-user documentation included with the redistribution,
 *           if any, must include the following acknowledgment:
 *             "This product includes Radiance software
 *                 (http://radsite.lbl.gov/)
 *                 developed by the Lawrence Berkeley National Laboratory
 *               (http://www.lbl.gov/)."
 *       Alternately, this acknowledgment may appear in the software itself,
 *       if and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "Radiance," "Lawrence Berkeley National Laboratory"
 *       and "The Regents of the University of California" must
 *       not be used to endorse or promote products derived from this
 *       software without prior written permission. For written
 *       permission, please contact radiance@radsite.lbl.gov.
 *
 * 5. Products derived from this software may not be called "Radiance",
 *       nor may "Radiance" appear in their name, without prior written
 *       permission of Lawrence Berkeley National Laboratory.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED 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 Lawrence Berkeley National Laboratory OR
 * ITS 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.
 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of Lawrence Berkeley National Laboratory.   For more
 * information on Lawrence Berkeley National Laboratory, please see
 * <http://www.lbl.gov/>.
 */


#include  <stdio.h>
#include  <stdlib.h>


char *
emalloc(n)			/* return pointer to n uninitialized bytes */
unsigned int  n;
{
	register char  *cp;
	
	if (n == 0)
		return(NULL);

	if ((cp = (char *)malloc(n)) != NULL)
		return(cp);

	eputs("Out of memory in emalloc\n");
	quit(1);
}


char *
ecalloc(ne, es)			/* return pointer to initialized memory */
register unsigned int  ne;
unsigned int  es;
{
	register char  *cp;
	
	ne *= es;
	if (ne == 0)
		return(NULL);

	if ((cp = (char *)malloc(ne)) == NULL) {
		eputs("Out of memory in ecalloc\n");
		quit(1);
	}
	cp += ne;
	while (ne--)
		*--cp = 0;
	return(cp);
}


char *
erealloc(cp, n)			/* reallocate cp to size n */
register char  *cp;
unsigned int  n;
{
	if (n == 0) {
		if (cp != NULL)
			free(cp);
		return(NULL);
	}

	if (cp == NULL)
		cp = (char *)malloc(n);
	else 
		cp = (char *)realloc((void *)cp, n);

	if (cp != NULL)
		return(cp);

	eputs("Out of memory in erealloc\n");
	quit(1);
}


void
efree(cp)			/* free memory allocated by above */
char  *cp;
{
	free((char *)cp);
}