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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 
     36 MAKE_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. */
     41 static MAKE_ATTR_DEAD void
     42 enomem(void)
     43 {
     44 	(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
     45 	exit(2);
     46 }
     47 
     48 /* malloc, but die on error. */
     49 void *
     50 bmake_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. */
     60 char *
     61 bmake_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. */
     73 char *
     74 bmake_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. */
     83 void *
     84 bmake_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. */
     93 char *
     94 bmake_strsedup(const char *start, const char *end)
     95 {
     96 	return bmake_strldup(start, (size_t)(end - start));
     97 }
     98