freebsd-dev/contrib/bmake/make_malloc.c

/*	$NetBSD: make_malloc.c,v 1.10 2012/06/20 17:46:28 sjg Exp $	*/

/*-
 * Copyright (c) 2009 The NetBSD Foundation, Inc.
 * 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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
 */

#ifdef MAKE_NATIVE
#include <sys/cdefs.h>
__RCSID("$NetBSD: make_malloc.c,v 1.10 2012/06/20 17:46:28 sjg Exp $");
#endif

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

#include "make.h"

#ifndef USE_EMALLOC
static void enomem(void) MAKE_ATTR_DEAD;

/*
 * enomem --
 *	die when out of memory.
 */
static void
enomem(void)
{
	(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
	exit(2);
}

/*
 * bmake_malloc --
 *	malloc, but die on error.
 */
void *
bmake_malloc(size_t len)
{
	void *p;

	if ((p = malloc(len)) == NULL)
		enomem();
	return(p);
}

/*
 * bmake_strdup --
 *	strdup, but die on error.
 */
char *
bmake_strdup(const char *str)
{
	size_t len;
	char *p;

	len = strlen(str) + 1;
	if ((p = malloc(len)) == NULL)
		enomem();
	return memcpy(p, str, len);
}

/*
 * bmake_strndup --
 *	strndup, but die on error.
 */
char *
bmake_strndup(const char *str, size_t max_len)
{
	size_t len;
	char *p;

	if (str == NULL)
		return NULL;

	len = strlen(str);
	if (len > max_len)
		len = max_len;
	p = bmake_malloc(len + 1);
	memcpy(p, str, len);
	p[len] = '\0';

	return(p);
}

/*
 * bmake_realloc --
 *	realloc, but die on error.
 */
void *
bmake_realloc(void *ptr, size_t size)
{
	if ((ptr = realloc(ptr, size)) == NULL)
		enomem();
	return(ptr);
}
#endif