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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, 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 */ 55