make_malloc.c revision 1.19 
1/*	$NetBSD: make_malloc.c,v 1.19 2020/09/13 15:15:51 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 1.19 2020/09/13 15:15:51 rillig Exp $");
37
38#ifndef USE_EMALLOC
39static MAKE_ATTR_DEAD void enomem(void);
40
41/* die when out of memory. */
42static MAKE_ATTR_DEAD void
43enomem(void)
44{
45	(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
46	exit(2);
47}
48
49/* malloc, but die on error. */
50void *
51bmake_malloc(size_t len)
52{
53	void *p;
54
55	if ((p = malloc(len)) == NULL)
56		enomem();
57	return p;
58}
59
60/* strdup, but die on error. */
61char *
62bmake_strdup(const char *str)
63{
64	size_t len;
65	char *p;
66
67	len = strlen(str) + 1;
68	if ((p = malloc(len)) == NULL)
69		enomem();
70	return memcpy(p, str, len);
71}
72
73/* Allocate a string starting from str with exactly len characters. */
74char *
75bmake_strldup(const char *str, size_t len)
76{
77	char *p = bmake_malloc(len + 1);
78	memcpy(p, str, len);
79	p[len] = '\0';
80	return p;
81}
82
83/* realloc, but die on error. */
84void *
85bmake_realloc(void *ptr, size_t size)
86{
87	if ((ptr = realloc(ptr, size)) == NULL)
88		enomem();
89	return ptr;
90}
91#endif
92
93/* Allocate a string from start up to but excluding end. */
94char *
95bmake_strsedup(const char *start, const char *end)
96{
97	return bmake_strldup(start, (size_t)(end - start));
98}
99