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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 
     36 MAKE_RCSID("$NetBSD: make_malloc.c,v 1.19 2020/09/13 15:15:51 rillig Exp $");
     37 
     38 #ifndef USE_EMALLOC
     39 static MAKE_ATTR_DEAD void enomem(void);
     40 
     41 /* die when out of memory. */
     42 static MAKE_ATTR_DEAD void
     43 enomem(void)
     44 {
     45 	(void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
     46 	exit(2);
     47 }
     48 
     49 /* malloc, but die on error. */
     50 void *
     51 bmake_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. */
     61 char *
     62 bmake_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. */
     74 char *
     75 bmake_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. */
     84 void *
     85 bmake_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. */
     94 char *
     95 bmake_strsedup(const char *start, const char *end)
     96 {
     97 	return bmake_strldup(start, (size_t)(end - start));
     98 }
     99