contrib/bmake/make_malloc.c

   1 /*      $NetBSD: make_malloc.c,v 1.26 2022/01/07 08:30:04 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 <errno.h>
  30
  31 #include "make.h"
  32
  33 MAKE_RCSID("$NetBSD: make_malloc.c,v 1.26 2022/01/07 08:30:04 rillig Exp $");
  34
  35 #ifndef USE_EMALLOC
  36
  37 /* die when out of memory. */
  38 static MAKE_ATTR_DEAD void
  39 enomem(void)
  40 {
  41         (void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
  42         exit(2);
  43 }
  44
  45 /* malloc, but die on error. */
  46 void *
  47 bmake_malloc(size_t len)
  48 {
  49         void *p;
  50
  51         if ((p = malloc(len)) == NULL)
  52                 enomem();
  53         return p;
  54 }
  55
  56 /* strdup, but die on error. */
  57 char *
  58 bmake_strdup(const char *str)
  59 {
  60         size_t size;
  61         char *p;
  62
  63         size = strlen(str) + 1;
  64         p = bmake_malloc(size);
  65         return memcpy(p, str, size);
  66 }
  67
  68 /* Allocate a string starting from str with exactly len characters. */
  69 char *
  70 bmake_strldup(const char *str, size_t len)
  71 {
  72         char *p = bmake_malloc(len + 1);
  73         memcpy(p, str, len);
  74         p[len] = '\0';
  75         return p;
  76 }
  77
  78 /* realloc, but die on error. */
  79 void *
  80 bmake_realloc(void *ptr, size_t size)
  81 {
  82         if ((ptr = realloc(ptr, size)) == NULL)
  83                 enomem();
  84         return ptr;
  85 }
  86 #endif
  87
  88 /* Allocate a string from start up to but excluding end. */
  89 char *
  90 bmake_strsedup(const char *start, const char *end)
  91 {
  92         return bmake_strldup(start, (size_t)(end - start));
  93 }