/* Memory allocation on the stack. Copyright (C) 1995, 1999, 2001-2005 Free Software Foundation, Inc. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ /* When this file is included, it may be preceded only by preprocessor declarations. Thanks to AIX. Therefore we include it right after "config.h", not later. */ /* Avoid using the symbol _ALLOCA_H here, as Bison assumes _ALLOCA_H means there is a real alloca function. */ #ifndef _GNULIB_ALLOCA_H #define _GNULIB_ALLOCA_H /* alloca(N) returns a pointer (void* or char*) to N bytes of memory allocated on the stack, and which will last until the function returns. Use of alloca should be avoided: - inside arguments of function calls - undefined behaviour, - in inline functions - the allocation may actually last until the calling function returns, - for huge N (say, N >= 65536) - you never know how large (or small) the stack is, and when the stack cannot fulfill the memory allocation request, the program just crashes. */ #ifdef __GNUC__ # ifndef alloca # define alloca __builtin_alloca # endif #else # ifdef _MSC_VER # include <malloc.h> # define alloca _alloca # else # if HAVE_ALLOCA_H # include <alloca.h> # else # ifdef _AIX #pragma alloca # else # ifdef __hpux /* This section must match that of bison generated files. */ # ifdef __cplusplus extern "C" void *alloca (unsigned int); # else /* not __cplusplus */ extern void *alloca (); # endif /* not __cplusplus */ # else /* not __hpux */ # ifndef alloca extern char *alloca (); # endif # endif /* __hpux */ # endif # endif # endif #endif #endif /* _GNULIB_ALLOCA_H */