rlm@1: /*
rlm@1: ** $Id: llimits.h,v 1.69.1.1 2007/12/27 13:02:25 roberto Exp $
rlm@1: ** Limits, basic types, and some other `installation-dependent' definitions
rlm@1: ** See Copyright Notice in lua.h
rlm@1: */
rlm@1: 
rlm@1: #ifndef llimits_h
rlm@1: #define llimits_h
rlm@1: 
rlm@1: 
rlm@1: #include <limits.h>
rlm@1: #include <stddef.h>
rlm@1: 
rlm@1: 
rlm@1: #include "lua.h"
rlm@1: 
rlm@1: 
rlm@1: typedef LUAI_UINT32 lu_int32;
rlm@1: 
rlm@1: typedef LUAI_UMEM lu_mem;
rlm@1: 
rlm@1: typedef LUAI_MEM l_mem;
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: /* chars used as small naturals (so that `char' is reserved for characters) */
rlm@1: typedef unsigned char lu_byte;
rlm@1: 
rlm@1: 
rlm@1: #define MAX_SIZET	((size_t)(~(size_t)0)-2)
rlm@1: 
rlm@1: #define MAX_LUMEM	((lu_mem)(~(lu_mem)0)-2)
rlm@1: 
rlm@1: 
rlm@1: #define MAX_INT (INT_MAX-2)  /* maximum value of an int (-2 for safety) */
rlm@1: 
rlm@1: /*
rlm@1: ** conversion of pointer to integer
rlm@1: ** this is for hashing only; there is no problem if the integer
rlm@1: ** cannot hold the whole pointer value
rlm@1: */
rlm@1: #define IntPoint(p)  ((unsigned int)(lu_mem)(p))
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: /* type to ensure maximum alignment */
rlm@1: typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
rlm@1: 
rlm@1: 
rlm@1: /* result of a `usual argument conversion' over lua_Number */
rlm@1: typedef LUAI_UACNUMBER l_uacNumber;
rlm@1: 
rlm@1: 
rlm@1: /* internal assertions for in-house debugging */
rlm@1: #ifdef lua_assert
rlm@1: 
rlm@1: #define check_exp(c,e)		(lua_assert(c), (e))
rlm@1: #define api_check(l,e)		lua_assert(e)
rlm@1: 
rlm@1: #else
rlm@1: 
rlm@1: #define lua_assert(c)		((void)0)
rlm@1: #define check_exp(c,e)		(e)
rlm@1: #define api_check		luai_apicheck
rlm@1: 
rlm@1: #endif
rlm@1: 
rlm@1: 
rlm@1: #ifndef UNUSED
rlm@1: #define UNUSED(x)	((void)(x))	/* to avoid warnings */
rlm@1: #endif
rlm@1: 
rlm@1: 
rlm@1: #ifndef cast
rlm@1: #define cast(t, exp)	((t)(exp))
rlm@1: #endif
rlm@1: 
rlm@1: #define cast_byte(i)	cast(lu_byte, (i))
rlm@1: #define cast_num(i)	cast(lua_Number, (i))
rlm@1: #define cast_int(i)	cast(int, (i))
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: /*
rlm@1: ** type for virtual-machine instructions
rlm@1: ** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
rlm@1: */
rlm@1: typedef lu_int32 Instruction;
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: /* maximum stack for a Lua function */
rlm@1: #define MAXSTACK	250
rlm@1: 
rlm@1: 
rlm@1: 
rlm@1: /* minimum size for the string table (must be power of 2) */
rlm@1: #ifndef MINSTRTABSIZE
rlm@1: #define MINSTRTABSIZE	32
rlm@1: #endif
rlm@1: 
rlm@1: 
rlm@1: /* minimum size for string buffer */
rlm@1: #ifndef LUA_MINBUFFER
rlm@1: #define LUA_MINBUFFER	32
rlm@1: #endif
rlm@1: 
rlm@1: 
rlm@1: #ifndef lua_lock
rlm@1: #define lua_lock(L)     ((void) 0) 
rlm@1: #define lua_unlock(L)   ((void) 0)
rlm@1: #endif
rlm@1: 
rlm@1: #ifndef luai_threadyield
rlm@1: #define luai_threadyield(L)     {lua_unlock(L); lua_lock(L);}
rlm@1: #endif
rlm@1: 
rlm@1: 
rlm@1: /*
rlm@1: ** macro to control inclusion of some hard tests on stack reallocation
rlm@1: */ 
rlm@1: #ifndef HARDSTACKTESTS
rlm@1: #define condhardstacktests(x)	((void)0)
rlm@1: #else
rlm@1: #define condhardstacktests(x)	x
rlm@1: #endif
rlm@1: 
rlm@1: #endif