mdw@git.distorted.org.uk Git - ssr/blob - StraySrc/Utilities/c/alloc

   1 /*
   2  * alloc.c
   3  *
   4  * Trivial veneers for allocating memory
   5  *
   6  * © 1998 Straylight/Edgeware
   7  */
   8
   9 /*----- Licensing note ----------------------------------------------------*
  10  *
  11  * This file is part of Straylight's core utilities (coreutils).
  12  *
  13  * Coreutils is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2, or (at your option)
  16  * any later version.
  17  *
  18  * Coreutils is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with coreutils.  If not, write to the Free Software Foundation,
  25  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  26  */
  27
  28 /*----- Header files ------------------------------------------------------*/
  29
  30 #include <stdio.h>
  31 #include <stdlib.h>
  32 #include <string.h>
  33
  34 #include "alloc.h"
  35
  36 /*----- Main code ---------------------------------------------------------*/
  37
  38 /* --- @xmalloc@ --- *
  39  *
  40  * Arguments:   @size_t sz@ = size of block to allocate
  41  *
  42  * Returns:     Pointer to newly allocated block.
  43  *
  44  * Use:         Returns a block of the requested size, or not at all.
  45  */
  46
  47 void *xmalloc(size_t sz)
  48 {
  49   void *p = malloc(sz);
  50   if (!p) {
  51     fprintf(stderr, "inst: not enough memory\n");
  52     exit(1);
  53   }
  54   return (p);
  55 }
  56
  57 /* --- @xrealloc@ --- *
  58  *
  59  * Arguments:   @void *p@ = pointer to a block of memory
  60  *              @size_t sz@ = size we want it to be
  61  *
  62  * Returns:     Pointer to resized block
  63  *
  64  * Use:         Resizes a block.  Returns the resized block, or not at all.
  65  */
  66
  67 void *xrealloc(void *p, size_t sz)
  68 {
  69   p = realloc(p, sz);
  70   if (!p) {
  71     fprintf(stderr, "inst: not enough memory\n");
  72     exit(1);
  73   }
  74   return (p);
  75 }
  76
  77 /* --- @xstrdup@ --- *
  78  *
  79  * Arguments:   @const char *p@ = pointer to string to copy
  80  *
  81  * Returns:     Pointer to a copy of the string.
  82  *
  83  * Use:         Returns a copy of a string, or not at all.
  84  */
  85
  86 char *xstrdup(const char *p)
  87 {
  88   size_t sz = strlen(p) + 1;
  89   char *q = xmalloc(sz);
  90   memcpy(q, p, sz);
  91   return (q);
  92 }
  93
  94 /*----- That's all, folks -------------------------------------------------*/