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