usr.bin/make/make_malloc.c

   1 /*      $NetBSD: make_malloc.c,v 1.10 2012/06/20 17:46:28 sjg 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 #ifdef MAKE_NATIVE
  30 #include <sys/cdefs.h>
  31 __RCSID("$NetBSD: make_malloc.c,v 1.10 2012/06/20 17:46:28 sjg Exp $");
  32 #endif
  33
  34 #include <stdio.h>
  35 #include <stdlib.h>
  36 #include <string.h>
  37 #include <errno.h>
  38
  39 #include "make.h"
  40
  41 #ifndef USE_EMALLOC
  42 static void enomem(void) MAKE_ATTR_DEAD;
  43
  44 /*
  45  * enomem --
  46  *      die when out of memory.
  47  */
  48 static void
  49 enomem(void)
  50 {
  51         (void)fprintf(stderr, "%s: %s.\n", progname, strerror(ENOMEM));
  52         exit(2);
  53 }
  54
  55 /*
  56  * bmake_malloc --
  57  *      malloc, but die on error.
  58  */
  59 void *
  60 bmake_malloc(size_t len)
  61 {
  62         void *p;
  63
  64         if ((p = malloc(len)) == NULL)
  65                 enomem();
  66         return(p);
  67 }
  68
  69 /*
  70  * bmake_strdup --
  71  *      strdup, but die on error.
  72  */
  73 char *
  74 bmake_strdup(const char *str)
  75 {
  76         size_t len;
  77         char *p;
  78
  79         len = strlen(str) + 1;
  80         if ((p = malloc(len)) == NULL)
  81                 enomem();
  82         return memcpy(p, str, len);
  83 }
  84
  85 /*
  86  * bmake_strndup --
  87  *      strndup, but die on error.
  88  */
  89 char *
  90 bmake_strndup(const char *str, size_t max_len)
  91 {
  92         size_t len;
  93         char *p;
  94
  95         if (str == NULL)
  96                 return NULL;
  97
  98         len = strlen(str);
  99         if (len > max_len)
 100                 len = max_len;
 101         p = bmake_malloc(len + 1);
 102         memcpy(p, str, len);
 103         p[len] = '\0';
 104
 105         return(p);
 106 }
 107
 108 /*
 109  * bmake_realloc --
 110  *      realloc, but die on error.
 111  */
 112 void *
 113 bmake_realloc(void *ptr, size_t size)
 114 {
 115         if ((ptr = realloc(ptr, size)) == NULL)
 116                 enomem();
 117         return(ptr);
 118 }
 119 #endif