make_malloc.c revision 1.22 
1/*	$NetBSD: make_malloc.c,v 1.22 2020/10/05 19:24:29 rillig Exp $	*/
2
3/*-
4 * Copyright (c) 2009 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
26 * POSSIBILITY OF SUCH DAMAGE.
27 */
28
29#include <stdio.h>
30#include <stdlib.h>
31#include <string.h>
32#include <errno.h>
33
34#include "make.h"
35
36MAKE_RCSID("$NetBSD: make_malloc.c,v 1.22 2020/10/05 19:24:29 rillig Exp $");
37
38#ifndef USE_EMALLOC
39
40/* die when out of memory. */
41static MAKE_ATTR_DEAD void
42enomem(void)
43{
44	(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
45	exit(2);
46}
47
48/* malloc, but die on error. */
49void *
50bmake_malloc(size_t len)
51{
52	void *p;
53
54	if ((p = malloc(len)) == NULL)
55		enomem();
56	return p;
57}
58
59/* strdup, but die on error. */
60char *
61bmake_strdup(const char *str)
62{
63	size_t len;
64	char *p;
65
66	len = strlen(str) + 1;
67	if ((p = malloc(len)) == NULL)
68		enomem();
69	return memcpy(p, str, len);
70}
71
72/* Allocate a string starting from str with exactly len characters. */
73char *
74bmake_strldup(const char *str, size_t len)
75{
76	char *p = bmake_malloc(len + 1);
77	memcpy(p, str, len);
78	p[len] = '\0';
79	return p;
80}
81
82/* realloc, but die on error. */
83void *
84bmake_realloc(void *ptr, size_t size)
85{
86	if ((ptr = realloc(ptr, size)) == NULL)
87		enomem();
88	return ptr;
89}
90#endif
91
92/* Allocate a string from start up to but excluding end. */
93char *
94bmake_strsedup(const char *start, const char *end)
95{
96	return bmake_strldup(start, (size_t)(end - start));
97}
98