gnu/dist/gettext/gettext-tools/lib/xallocsa.h

   1 /* Safe automatic memory allocation with out of memory checking.
   2    Copyright (C) 2003, 2005 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2003.
   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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _XALLOCSA_H
  20 #define _XALLOCSA_H
  21
  22 #include "allocsa.h"
  23
  24
  25 #ifdef __cplusplus
  26 extern "C" {
  27 #endif
  28
  29
  30 /* xallocsa(N) is a checking safe variant of alloca(N).  It allocates N bytes
  31    of memory allocated on the stack, that must be freed using freesa() before
  32    the function returns.  Upon failure, it exits with an error message.  */
  33 #if HAVE_ALLOCA
  34 # define xallocsa(N) \
  35   ((N) < 4032 - sa_increment                                        \
  36    ? (void *) ((char *) alloca ((N) + sa_increment) + sa_increment) \
  37    : xmallocsa (N))
  38 extern void * xmallocsa (size_t n);
  39 #else
  40 # define xallocsa(N) \
  41   xmalloc (N)
  42 #endif
  43
  44 /* Maybe we should also define a variant
  45     xnallocsa (size_t n, size_t s) - behaves like xallocsa (n * s)
  46    If this would be useful in your application. please speak up.  */
  47
  48
  49 #ifdef __cplusplus
  50 }
  51 #endif
  52
  53
  54 #endif /* _XALLOCSA_H */