mirror of
https://github.com/UberGames/rpgxEF.git
synced 2024-11-10 15:21:34 +00:00
a39565b783
... not quite content with where the project files lie but it is ok for now. ... compiling works fine so far (only tested mingw32 right now)
281 lines
6.6 KiB
C
281 lines
6.6 KiB
C
/*
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** $Id: llimits.h,v 1.84 2010/11/08 16:33:20 roberto Exp $
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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 unsigned LUA_INT32 lu_int32;
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typedef LUAI_UMEM lu_mem;
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typedef LUAI_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 MIN_LMEM ((l_mem)~((~(lu_mem)0)>>1))
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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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#if !defined(LUAI_USER_ALIGNMENT_T)
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#define LUAI_USER_ALIGNMENT_T union { double u; void *s; long l; }
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#endif
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typedef LUAI_USER_ALIGNMENT_T L_Umaxalign;
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/* result of a `usual argument conversion' over lua_Number */
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typedef LUAI_UACNUMBER l_uacNumber;
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/* internal assertions for in-house debugging */
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#if defined(lua_assert)
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#define check_exp(c,e) (lua_assert(c), (e))
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#else
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#define lua_assert(c) /* empty */
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#define check_exp(c,e) (e)
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#endif
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/*
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** assertion for checking API calls
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*/
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#if defined(LUA_USE_APICHECK)
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#include <assert.h>
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#define luai_apicheck(L,e) { (void)L; assert(e); }
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#elif !defined(luai_apicheck)
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#define luai_apicheck(L,e) lua_assert(e)
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#endif
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#define api_check(l,e,msg) luai_apicheck(l,(e) && msg)
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#if !defined(UNUSED)
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#define UNUSED(x) ((void)(x)) /* to avoid warnings */
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#endif
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#define cast(t, exp) ((t)(exp))
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#define cast_byte(i) cast(lu_byte, (i))
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#define cast_num(i) cast(lua_Number, (i))
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#define cast_int(i) cast(int, (i))
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/*
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** maximum depth for nested C calls and syntactical nested non-terminals
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** in a program. (Value must fit in an unsigned short int.)
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*/
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#if !defined(LUAI_MAXCCALLS)
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#define LUAI_MAXCCALLS 200
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#endif
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/*
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** maximum number of upvalues in a closure (both C and Lua). (Value
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** must fit in an unsigned char.)
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*/
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#define MAXUPVAL UCHAR_MAX
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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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/* 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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#if !defined(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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#if !defined(LUA_MINBUFFER)
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#define LUA_MINBUFFER 32
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#endif
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#if !defined(lua_lock)
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#define lua_lock(L) ((void) 0)
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#define lua_unlock(L) ((void) 0)
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#endif
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#if !defined(luai_threadyield)
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#define luai_threadyield(L) {lua_unlock(L); lua_lock(L);}
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#endif
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/*
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** these macros allow user-specific actions on threads when you defined
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** LUAI_EXTRASPACE and need to do something extra when a thread is
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** created/deleted/resumed/yielded.
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*/
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#if !defined(luai_userstateopen)
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#define luai_userstateopen(L) ((void)L)
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#endif
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#if !defined(luai_userstateclose)
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#define luai_userstateclose(L) ((void)L)
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#endif
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#if !defined(luai_userstatethread)
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#define luai_userstatethread(L,L1) ((void)L)
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#endif
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#if !defined(luai_userstatefree)
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#define luai_userstatefree(L,L1) ((void)L)
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#endif
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#if !defined(luai_userstateresume)
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#define luai_userstateresume(L,n) ((void)L)
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#endif
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#if !defined(luai_userstateyield)
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#define luai_userstateyield(L,n) ((void)L)
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#endif
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/*
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** lua_number2int is a macro to convert lua_Number to int.
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** lua_number2integer is a macro to convert lua_Number to lua_Integer.
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** lua_number2unsigned is a macro to convert a lua_Number to a lua_Unsigned.
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** lua_unsigned2number is a macro to convert a lua_Unsigned to a lua_Number.
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*/
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#if defined(MS_ASMTRICK) /* { */
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/* trick with Microsoft assembler for X86 */
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#define lua_number2int(i,n) __asm {__asm fld n __asm fistp i}
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#define lua_number2integer(i,n) lua_number2int(i, n)
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#define lua_number2unsigned(i,n) \
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{__int64 l; __asm {__asm fld n __asm fistp l} i = (unsigned int)l;}
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#elif defined(LUA_IEEE754TRICK) /* }{ */
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/* the next trick should work on any machine using IEEE754 with
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a 32-bit integer type */
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union luai_Cast { double l_d; LUA_INT32 l_p[2]; };
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#if !defined(LUA_IEEEENDIAN) /* { */
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#define LUAI_EXTRAIEEE \
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static const union luai_Cast ieeeendian = {-(33.0 + 6755399441055744.0)};
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#define LUA_IEEEENDIAN (ieeeendian.l_p[1] == 33)
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#else
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#define LUAI_EXTRAIEEE /* empty */
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#endif /* } */
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#define lua_number2int32(i,n,t) \
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{ LUAI_EXTRAIEEE \
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volatile union luai_Cast u; u.l_d = (n) + 6755399441055744.0; \
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(i) = (t)u.l_p[LUA_IEEEENDIAN]; }
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#define lua_number2int(i,n) lua_number2int32(i, n, int)
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#define lua_number2integer(i,n) lua_number2int32(i, n, lua_Integer)
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#define lua_number2unsigned(i,n) lua_number2int32(i, n, lua_Unsigned)
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#endif /* } */
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/* the following definitions always work, but may be slow */
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#if !defined(lua_number2int)
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#define lua_number2int(i,n) ((i)=(int)(n))
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#endif
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#if !defined(lua_number2integer)
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#define lua_number2integer(i,n) ((i)=(lua_Integer)(n))
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#endif
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#if !defined(lua_number2unsigned) /* { */
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/* the following definition assures proper modulo behavior */
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#if defined(LUA_NUMBER_DOUBLE)
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#include <math.h>
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#define SUPUNSIGNED ((lua_Number)(~(lua_Unsigned)0) + 1)
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#define lua_number2unsigned(i,n) \
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((i)=(lua_Unsigned)((n) - floor((n)/SUPUNSIGNED)*SUPUNSIGNED))
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#else
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#define lua_number2unsigned(i,n) ((i)=(lua_Unsigned)(n))
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#endif
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#endif /* } */
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#if !defined(lua_unsigned2number)
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/* on several machines, coercion from unsigned to double is slow,
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so it may be worth to avoid */
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#define lua_unsigned2number(u) \
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(((u) <= (lua_Unsigned)INT_MAX) ? (lua_Number)(int)(u) : (lua_Number)(u))
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#endif
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/*
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** luai_hashnum is a macro do hash a lua_Number value into an integer.
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** The hash must be deterministic and give reasonable values for
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** both small and large values (outside the range of integers).
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** It is used only in ltable.c.
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*/
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#if !defined(luai_hashnum) /* { */
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#include <float.h>
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#include <math.h>
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#define luai_hashnum(i,n) { int e; \
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n = frexp(n, &e) * (lua_Number)(INT_MAX - DBL_MAX_EXP); \
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lua_number2int(i, n); i += e; }
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#endif /* } */
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/*
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** macro to control inclusion of some hard tests on stack reallocation
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*/
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#if !defined(HARDSTACKTESTS)
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#define condmovestack(L) ((void)0)
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#else
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/* realloc stack keeping its size */
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#define condmovestack(L) luaD_reallocstack((L), (L)->stacksize)
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#endif
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#if !defined(HARDMEMTESTS)
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#define condchangemem(L) condmovestack(L)
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#else
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#define condchangemem(L) \
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((void)(gcstopped(G(L)) || (luaC_fullgc(L, 0), 1)))
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#endif
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#endif
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