lib/malloc.c

   1 /* malloc() function that is glibc compatible.
   2
   3    Copyright (C) 1997, 1998, 2006, 2007 Free Software Foundation, Inc.
   4
   5    This program is free software; you can redistribute it and/or modify
   6    it under the terms of the GNU General Public License as published by
   7    the Free Software Foundation; either version 2, or (at your option)
   8    any later version.
   9
  10    This program is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13    GNU General Public License for more details.
  14
  15    You should have received a copy of the GNU General Public License
  16    along with this program; if not, write to the Free Software Foundation,
  17    Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
  18
  19 /* written by Jim Meyering and Bruno Haible */
  20
  21 #include <config.h>
  22 /* Only the AC_FUNC_MALLOC macro defines 'malloc' already in config.h.  */
  23 #ifdef malloc
  24 # define NEED_MALLOC_GNU
  25 # undef malloc
  26 #endif
  27
  28 /* Specification.  */
  29 #include <stdlib.h>
  30
  31 #include <errno.h>
  32
  33 /* Call the system's malloc below.  */
  34 #undef malloc
  35
  36 /* Allocate an N-byte block of memory from the heap.
  37    If N is zero, allocate a 1-byte block.  */
  38
  39 void *
  40 rpl_malloc (size_t n)
  41 {
  42   void *result;
  43
  44 #ifdef NEED_MALLOC_GNU
  45   if (n == 0)
  46     n = 1;
  47 #endif
  48
  49   result = malloc (n);
  50
  51 #if !HAVE_MALLOC_POSIX
  52   if (result == NULL)
  53     errno = ENOMEM;
  54 #endif
  55
  56   return result;
  57 }