mirror of
https://github.com/lua/lua
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97 lines
1.6 KiB
C
97 lines
1.6 KiB
C
/*
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** $Id: llimits.h,v 1.61 2004/11/24 18:55:56 roberto Exp roberto $
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** Limits, basic types, and some other `installation-dependent' definitions
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** See Copyright Notice in lua.h
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*/
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#ifndef llimits_h
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#define llimits_h
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#include <limits.h>
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#include <stddef.h>
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#include "lua.h"
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typedef LUA_UINT32 lu_int32;
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typedef LU_MEM lu_mem;
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typedef L_MEM l_mem;
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/* chars used as small naturals (so that `char' is reserved for characters) */
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typedef unsigned char lu_byte;
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#define MAX_SIZET ((size_t)(~(size_t)0)-2)
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#define MAX_LUMEM ((lu_mem)(~(lu_mem)0)-2)
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#define MAX_INT (INT_MAX-2) /* maximum value of an int (-2 for safety) */
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/*
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** conversion of pointer to integer
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** this is for hashing only; there is no problem if the integer
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** cannot hold the whole pointer value
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*/
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#define IntPoint(p) ((unsigned int)(lu_mem)(p))
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/* type to ensure maximum alignment */
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typedef LUSER_ALIGNMENT_T L_Umaxalign;
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/* result of a `usual argument conversion' over lua_Number */
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typedef LUA_UACNUMBER l_uacNumber;
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#define check_exp(c,e) (lua_assert(c), (e))
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#ifndef UNUSED
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#define UNUSED(x) ((void)(x)) /* to avoid warnings */
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#endif
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#ifndef cast
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#define cast(t, exp) ((t)(exp))
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#endif
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/*
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** type for virtual-machine instructions
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** must be an unsigned with (at least) 4 bytes (see details in lopcodes.h)
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*/
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typedef lu_int32 Instruction;
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/* divisor for GC pace */
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#define GCDIV 8
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/* maximum stack for a Lua function */
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#define MAXSTACK 250
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/* minimum size for the string table (must be power of 2) */
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#ifndef MINSTRTABSIZE
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#define MINSTRTABSIZE 32
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#endif
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/* minimum size for string buffer */
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#ifndef LUA_MINBUFFER
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#define LUA_MINBUFFER 32
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#endif
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#endif
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