/*
 *  alloca.h    Dynamic stack storage allocation
 *
 * =========================================================================
 *
 *                          Open Watcom Project
 *
 *    Copyright (c) 2002-2010 Open Watcom Contributors. All Rights Reserved.
 *    Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
 *
 *    This file is automatically generated. Do not edit directly.
 *
 * =========================================================================
 */
#ifndef _STRINGS_H_INCLUDED
#define _STRINGS_H_INCLUDED

#ifndef _ENABLE_AUTODEPEND
 #pragma read_only_file;
#endif

#ifndef _COMDEF_H_INCLUDED
 #include <_comdef.h>
#endif

#ifdef __cplusplus
 #ifndef _STDSIZE_T_DEFINED
 #define _STDSIZE_T_DEFINED
  namespace std {
    typedef unsigned size_t;
  }
  typedef std::size_t _w_size_t;
 #endif
 #ifndef _SIZE_T_DEFINED
 #define _SIZE_T_DEFINED
  #define _SIZE_T_DEFINED_
  using std::size_t;
 #endif
#else  /* __cplusplus not defined */
 #ifndef _SIZE_T_DEFINED
 #define _SIZE_T_DEFINED
  #define _SIZE_T_DEFINED_
  typedef unsigned size_t;
  typedef size_t   _w_size_t;
 #endif
#endif /* __cplusplus not defined */

#ifndef NULL
 #ifdef __cplusplus
  #if !defined(_M_I86) || defined(__SMALL__) || defined(__MEDIUM__)
   #define NULL 0
  #else
   #define NULL 0L
  #endif 
 #else
  #define NULL ((void *)0)
 #endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

#ifndef alloca
 _WCRTLINK extern void  *alloca(_w_size_t __size);
 _WCRTLINK extern void  *_alloca(_w_size_t __size);
 _WCRTLINK extern unsigned stackavail( void );
 #ifdef _M_IX86
  extern void  *__doalloca(_w_size_t __size);
  #pragma aux stackavail __modify __nomemory;

  #define __ALLOCA_ALIGN( s )   (((s)+(sizeof(int)-1))&~(sizeof(int)-1))
  #define __alloca( s )         __doalloca(__ALLOCA_ALIGN(s))

   #define alloca( s )  ((__ALLOCA_ALIGN(s)<stackavail())?__alloca(s):NULL)
   #define _alloca( s ) ((__ALLOCA_ALIGN(s)<stackavail())?__alloca(s):NULL)

  #if defined(__386__)
   #pragma aux __doalloca = \
            "sub esp,eax"   \
            __parm __nomemory [__eax] __value [__esp] __modify __exact __nomemory [__esp];
  #elif defined(__SMALL__) || defined(__MEDIUM__) /* small data models */
   #pragma aux __doalloca = \
            "sub sp,ax"     \
            __parm __nomemory [__ax] __value [__sp] __modify __exact __nomemory [__sp];
  #else                                           /* large data models */
   #pragma aux __doalloca = \
            "sub sp,ax"     \
            "mov ax,sp"     \
            "mov dx,ss"     \
            __parm __nomemory [__ax] __value [__dx __ax] __modify __exact __nomemory [__dx __ax __sp];
  #endif
 #else
  extern void *__builtin_alloca(_w_size_t __size);
  #pragma intrinsic(__builtin_alloca);

  #define __alloca( s ) (__builtin_alloca(s))

  #define alloca( s )   ((s<stackavail())?__alloca(s):NULL)
  #define _alloca( s )  ((s<stackavail())?__alloca(s):NULL)
 #endif
#endif

#ifdef __cplusplus
} /* extern "C" */
#endif

#endif
