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DelphiLua/Lua.API.pas

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{
Header for Lua 5.2.1 Binaries DLL
http://luabinaries.sourceforge.net/
Delphi conversion by M. van Renswoude, April 2014:
This software is provided 'as-is', without any express or implied
warranty. In no event will the authors be held liable for any damages
arising from the use of this software.
Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:
1. The origin of this software must not be misrepresented; you must not
claim that you wrote the original software. If you use this software
in a product, an acknowledgment in the product documentation would be
appreciated but is not required.
2. Altered source versions must be plainly marked as such, and must not be
misrepresented as being the original software.
3. This notice may not be removed or altered from any source
distribution.
}
unit Lua.API;
interface
uses
System.SysUtils;
const
LUA_VERSION_MAJOR = '5';
LUA_VERSION_MINOR = '2';
LUA_VERSION_NUM = 502;
LUA_VERSION_RELEASE = '1';
LUA_VERSION_ = 'Lua ' + LUA_VERSION_MAJOR + '.' + LUA_VERSION_MINOR;
LUA_RELEASE = LUA_VERSION_ + '.' + LUA_VERSION_RELEASE;
LUA_COPYRIGHT = LUA_RELEASE + ' Copyright (C) 1994-2012 Lua.org, PUC-Rio';
LUA_AUTHORS = 'R. Ierusalimschy, L. H. de Figueiredo, W. Celes';
{ mark for precompiled code ('<esc>Lua') }
LUA_SIGNATURE = #33'Lua';
{ option for multiple returns in 'lua_pcall' and 'lua_call' }
LUA_MULTRET = -1;
{ reserve some space for error handling }
LUAI_MAXSTACK = 1000000;
LUAI_FIRSTPSEUDOIDX = (-LUAI_MAXSTACK - 1000);
{ pseudo-indices }
LUA_REGISTRYINDEX = LUAI_FIRSTPSEUDOIDX;
function lua_upvalueindex(idx: Integer): Integer; inline;
const
{ thread status }
LUA_OK = 0;
LUA_YIELD_ = 1;
LUA_ERRRUN = 2;
LUA_ERRSYNTAX = 3;
LUA_ERRMEM = 4;
LUA_ERRGCMM = 5;
LUA_ERRERR = 6;
type
size_t = NativeUint;
psize_t = ^size_t;
lua_State = type Pointer;
lua_CFunction = function(L: lua_State): Integer; cdecl;
{ functions that read/write blocks when loading/dumping Lua chunks }
lua_Reader = function(L: lua_State; ud: Pointer; var sz: size_t): PAnsiChar; cdecl;
lua_Writer = function(L: lua_State; p: Pointer; sz: size_t; ud: Pointer): Integer; cdecl;
{ prototype for memory-allocation functions }
lua_Alloc = function(ud, ptr: Pointer; osize, nsize: size_t): Pointer; cdecl;
const
{ basic types }
LUA_TNONE = (-1);
LUA_TNIL = 0;
LUA_TBOOLEAN = 1;
LUA_TLIGHTUSERDATA = 2;
LUA_TNUMBER = 3;
LUA_TSTRING = 4;
LUA_TTABLE = 5;
LUA_TFUNCTION = 6;
LUA_TUSERDATA = 7;
LUA_TTHREAD = 8;
LUA_NUMTAGS = 9;
{ minimum Lua stack available to a C function }
LUA_MINSTACK = 20;
{ predefined values in the registry }
LUA_RIDX_MAINTHREAD = 1;
LUA_RIDX_GLOBALS = 2;
LUA_RIDX_LAST = LUA_RIDX_GLOBALS;
type
{ type of numbers in Lua }
lua_Number = type Double;
{ type for integer functions }
lua_Integer = type Integer;
{ unsigned integer type }
lua_Unsigned = type Cardinal;
var
{ state manipulation }
lua_newstate: function(f: lua_Alloc; ud: Pointer): lua_State; cdecl;
lua_close: procedure(L: lua_State); cdecl;
lua_newthread: function(L: lua_State): lua_State; cdecl;
lua_atpanic: function(L: lua_State; panicf: lua_CFunction): lua_CFunction; cdecl;
lua_version: function(L: lua_State): lua_Number; cdecl;
{ basic stack manipulation }
lua_absindex: function(L: lua_State; idx: Integer): Integer; cdecl;
lua_gettop: function(L: lua_State): Integer; cdecl;
lua_settop: procedure(L: lua_State; idx: Integer); cdecl;
lua_pushvalue: procedure(L: lua_State; idx: Integer); cdecl;
lua_remove: procedure(L: lua_State; idx: Integer); cdecl;
lua_insert: procedure(L: lua_State; idx: Integer); cdecl;
lua_replace: procedure(L: lua_State; idx: Integer); cdecl;
lua_copy: procedure(L: lua_State; fromidx, toidx: Integer); cdecl;
lua_checkstack: function(L: lua_State; sz: Integer): Integer; cdecl;
lua_xmove: procedure(from: lua_State; _to: lua_State; n: Integer); cdecl;
{ access functions (stack -> C) }
lua_isnumber: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_isstring: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_iscfunction: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_isuserdata: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_type: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_typename: function (L: lua_State; tp: Integer): PAnsiChar; cdecl;
lua_tonumberx: function (L: lua_State; idx: Integer; isnum: PInteger): lua_Number; cdecl;
lua_tointegerx: function (L: lua_State; idx: Integer; isnum: PInteger): lua_Integer; cdecl;
lua_tounsignedx: function (L: lua_State; idx: Integer; isnum: PInteger): lua_Unsigned; cdecl;
lua_toboolean: function (L: lua_State; idx: Integer): Integer; cdecl;
lua_tolstring: function(L: lua_State; idx: Integer; len: psize_t): PAnsiChar; cdecl;
lua_rawlen: function (L: lua_State; idx: Integer): size_t; cdecl;
lua_tocfunction: function (L: lua_State; idx: Integer): lua_CFunction; cdecl;
lua_touserdata: function (L: lua_State; idx: Integer): Pointer; cdecl;
lua_tothread: function (L: lua_State; idx: Integer): lua_State; cdecl;
lua_topointer: function (L: lua_State; idx: Integer): Pointer; cdecl;
const
{ Comparison and arithmetic functions }
LUA_OPADD = 0; { ORDER TM }
LUA_OPSUB = 1;
LUA_OPMUL = 2;
LUA_OPDIV = 3;
LUA_OPMOD = 4;
LUA_OPPOW = 5;
LUA_OPUNM = 6;
var
lua_arith: procedure(L: lua_State; op: Integer); cdecl;
const
LUA_OPEQ = 0;
LUA_OPLT = 1;
LUA_OPLE = 2;
var
lua_rawequal: function(L: lua_State; idx1, idx2: Integer): Integer; cdecl;
lua_compare: function(L: lua_State; idx1, idx2, op: Integer): Integer; cdecl;
{ push functions (C -> stack) }
lua_pushnil: procedure(L: lua_State); cdecl;
lua_pushnumber: procedure(L: lua_State; n: lua_Number); cdecl;
lua_pushinteger: procedure(L: lua_State; n: lua_Integer); cdecl;
lua_pushunsigned: procedure(L: lua_State; n: lua_Unsigned); cdecl;
lua_pushlstring: function (L: lua_State; s: PAnsiChar; l_: size_t): PAnsiChar; cdecl;
lua_pushstring: function (L: lua_State; s: PAnsiChar): PAnsiChar; cdecl;
lua_pushvfstring: function (L: lua_State; fmt: PAnsiChar; argp: Pointer): PAnsiChar; cdecl;
lua_pushfstring: function (L: lua_State; fmt: PAnsiChar; argp: Pointer): PAnsiChar; cdecl;
lua_pushcclosure: procedure(L: lua_State; fn: lua_CFunction; n: Integer); cdecl;
lua_pushboolean: procedure(L: lua_State; b: Integer); cdecl;
lua_pushlightuserdata: procedure(L: lua_State; p: Pointer); cdecl;
lua_pushthread: function (L: lua_State): Integer; cdecl;
{ get functions (Lua -> stack) }
lua_getglobal: procedure(L: lua_State; value: PAnsiChar); cdecl;
lua_gettable: procedure(L: lua_State; idx: Integer); cdecl;
lua_getfield: procedure(L: lua_State; idx: Integer; k: PAnsiChar); cdecl;
lua_rawget: procedure(L: lua_State; idx: Integer); cdecl;
lua_rawgeti: procedure(L: lua_State; idx, n: Integer); cdecl;
lua_rawgetp: procedure(L: lua_State; idx: Integer; p: Pointer); cdecl;
lua_createtable: procedure(L: lua_State; narr: Integer; nrec: Integer); cdecl;
lua_newuserdata: procedure(L: lua_State; sz: size_t); cdecl;
lua_getmetatable: function(L: lua_State; objindex: Integer): Integer; cdecl;
lua_getuservalue: procedure(L: lua_State; idx: Integer); cdecl;
{ set functions (stack -> Lua) }
lua_setglobal: procedure(L: lua_State; value: PAnsiChar); cdecl;
lua_settable: procedure(L: lua_State; idx: Integer); cdecl;
lua_setfield: procedure(L: lua_State; idx: Integer; k: PAnsiChar); cdecl;
lua_rawset: procedure(L: lua_State; idx: Integer); cdecl;
lua_rawseti: procedure(L: lua_State; idx, n: Integer); cdecl;
lua_rawsetp: procedure(L: lua_State; idx: Integer; p: Pointer); cdecl;
lua_setmetatable: function(L: lua_State; objindex: Integer): Integer; cdecl;
lua_setuservalue: procedure(L: lua_State; idx: Integer); cdecl;
{ 'load' and 'call' functions (load and run Lua code) }
lua_callk: procedure(L: lua_State; nargs, nresults, ctx: Integer; k: lua_CFunction); cdecl;
lua_getctx: function(L: lua_State; var ctx: Integer): Integer; cdecl;
lua_pcallk: function(L: lua_State; nargs, nresults, errfunc, ctx: Integer; k: lua_CFunction): Integer; cdecl;
lua_load: function(L: lua_State; reader: lua_Reader; dt: Pointer; chunkname, mode: PAnsiChar): Integer; cdecl;
lua_dump: function(L: lua_State; writer: lua_Writer; data: Pointer): Integer; cdecl;
procedure lua_call(L: lua_State; nargs, nresults: Integer); inline;
function lua_pcall(L: lua_State; nargs, nresults, errfunc: Integer): Integer; inline;
var
{ coroutine functions }
lua_yieldk: function(L: lua_State; nresults, ctx: Integer; k: lua_CFunction): Integer; cdecl;
lua_resume: function(L, from: lua_State; nargs: Integer): Integer; cdecl;
lua_status: function(L: lua_State): Integer; cdecl;
function lua_yield(L: lua_State; nresults: Integer): Integer; inline;
const
{ garbage-collection function and options }
LUA_GCSTOP = 0;
LUA_GCRESTART = 1;
LUA_GCCOLLECT = 2;
LUA_GCCOUNT = 3;
LUA_GCCOUNTB = 4;
LUA_GCSTEP = 5;
LUA_GCSETPAUSE = 6;
LUA_GCSETSTEPMU = 7;
LUA_GCSETMAJORIN = 8;
LUA_GCISRUNNING = 9;
LUA_GCGEN = 0;
LUA_GCINC = 1;
var
lua_gc: function(L: lua_State; what, data: Integer): Integer; cdecl;
var
{ miscellaneous functions }
lua_error: function(L: lua_State): Integer; cdecl;
lua_next: function(L: lua_State; idx: Integer): Integer; cdecl;
lua_concat: procedure(L: lua_State; n: Integer); cdecl;
lua_len: procedure(L: lua_State; idx: Integer); cdecl;
lua_getallocf: function(L: lua_State; ud: Pointer): lua_Alloc; cdecl;
lua_setallocf: procedure(L: lua_State; f: lua_Alloc; ud: Pointer); cdecl;
{ some useful macros }
function lua_tonumber(L: lua_State; idx: Integer): lua_Number; inline;
function lua_tointeger(L: lua_State; idx: Integer): lua_Integer; inline;
function lua_tounsigned(L: lua_State; idx: Integer): lua_Unsigned; inline;
procedure lua_pop(L: lua_State; n: Integer); inline;
procedure lua_newtable(L: lua_State); inline;
procedure lua_register(L: lua_State; name: PAnsiChar; f: lua_CFunction); inline;
procedure lua_pushcfunction(L: lua_State; f: lua_CFunction); inline;
function lua_isfunction(L: lua_State; n: Integer): Boolean; inline;
function lua_istable(L: lua_State; n: Integer): Boolean; inline;
function lua_islightuserdata(L: lua_State; n: Integer): Boolean; inline;
function lua_isnil(L: lua_State; n: Integer): Boolean; inline;
function lua_isboolean(L: lua_State; n: Integer): Boolean; inline;
function lua_isthread(L: lua_State; n: Integer): Boolean; inline;
function lua_isnone(L: lua_State; n: Integer): Boolean; inline;
function lua_isnoneornil(L: lua_State; n: Integer): Boolean; inline;
function lua_pushliteral(L: lua_State; const s: AnsiString): PAnsiChar; inline;
procedure lua_pushglobaltable(L: lua_State); inline;
function lua_tostring(L: lua_State; idx: Integer): PAnsiChar; inline;
const
{======================================================================
Debug API
=======================================================================}
{ Event codes }
LUA_HOOKCALL = 0;
LUA_HOOKRET = 1;
LUA_HOOKLINE = 2;
LUA_HOOKCOUNT = 3;
LUA_HOOKTAILCALL = 4;
{ Event masks }
LUA_MASKCALL = (1 shl LUA_HOOKCALL);
LUA_MASKRET = (1 shl LUA_HOOKRET);
LUA_MASKLINE = (1 shl LUA_HOOKLINE);
LUA_MASKCOUNT = (1 shl LUA_HOOKCOUNT);
const
LUA_IDSIZE = 60;
type
lua_Debug = record
event: Integer;
name: PAnsiChar;
namewhat: PAnsiChar; // 'global', 'local', 'field', 'method'
what: PAnsiChar; // 'Lua', 'C', 'main', 'tail'
source: PAnsiChar;
currentline: Integer;
linedefined: Integer;
lastlinedefined: Integer;
nups: Byte;
nparams: Byte;
isvararg: Byte;
istailcall: Byte;
short_src: array[0..LUA_IDSIZE - 1] of AnsiChar;
//struct CallInfo *i_ci; /* active function */
end;
{ Functions to be called by the debugger in specific events }
lua_Hook = procedure(L: lua_State; var ar: lua_Debug); cdecl;
var
lua_getstack: function(L: lua_State; level: Integer; var ar: lua_Debug): Integer; cdecl;
lua_getinfo: function(L: lua_State; what: PAnsiChar; var ar: lua_Debug): Integer; cdecl;
lua_getlocal: function(L: lua_State; var ar: lua_Debug; n: Integer): PAnsiChar; cdecl;
lua_setlocal: function(L: lua_State; var ar: lua_Debug; n: Integer): PAnsiChar; cdecl;
lua_getupvalue: function(L: lua_State; funcindex, n: Integer): PAnsiChar; cdecl;
lua_setupvalue: function(L: lua_State; funcindex, n: Integer): PAnsiChar; cdecl;
lua_upvalueid: function(L: lua_State; fidx, n: Integer): Pointer; cdecl;
lua_upvaluejoin: procedure(L: lua_State; fidx1, n1, fidx2, n2: Integer);
lua_sethook: function(L: lua_State; func: lua_Hook; mask, count: Integer): Integer; cdecl;
lua_gethook: function(L: lua_State): lua_Hook; cdecl;
lua_gethookmask: function(L: lua_State): Integer; cdecl;
lua_gethookcount: function(L: lua_State): Integer; cdecl;
{====================================================================== }
const
LUA_COLIBNAME = 'coroutine';
LUA_TABLIBNAME = 'table';
LUA_IOLIBNAME = 'io';
LUA_OSLIBNAME = 'os';
LUA_STRLIBNAME = 'string';
LUA_BITLIBNAME = 'bit32';
LUA_MATHLIBNAME = 'math';
LUA_DBLIBNAME = 'debug';
LUA_LOADLIBNAME = 'package';
var
{ lualib }
luaopen_base: function(L: lua_State): Integer; cdecl;
luaopen_coroutine: function(L: lua_State): Integer; cdecl;
luaopen_table: function(L: lua_State): Integer; cdecl;
luaopen_io: function(L: lua_State): Integer; cdecl;
luaopen_os: function(L: lua_State): Integer; cdecl;
luaopen_string: function(L: lua_State): Integer; cdecl;
luaopen_bit32: function(L: lua_State): Integer; cdecl;
luaopen_math: function(L: lua_State): Integer; cdecl;
luaopen_debug: function(L: lua_State): Integer; cdecl;
luaopen_package: function(L: lua_State): Integer; cdecl;
{ open all previous libraries }
luaL_openlibs: procedure(L: lua_State); cdecl;
luaL_requiref: procedure(L: lua_State; modname: PAnsiChar; openf: lua_CFunction; glb: Integer); cdecl;
type
luaL_Reg = record
name: PAnsiChar;
func: lua_CFunction;
end;
PluaL_Reg = ^luaL_Reg;
var
luaL_setfuncs: procedure(L: lua_State; luaL_Reg: PluaL_Reg; nup: Integer); cdecl;
procedure luaL_where(L: lua_State; level: Integer);
function luaL_error(L: lua_State; fmt: PAnsiChar; argp: Pointer): Integer;
const
DefaultLuaLibName = 'lua' + LUA_VERSION_MAJOR + LUA_VERSION_MINOR + '.dll';
procedure LoadLuaLib(const AFileName: string = DefaultLuaLibName);
procedure UnloadLuaLib;
function LuaLibLoaded: Boolean;
function DefaultLuaAlloc(ud, ptr: Pointer; osize, nsize: size_t): Pointer; cdecl;
implementation
uses
System.Generics.Collections,
Winapi.Windows;
var
LuaLibHandle: THandle;
LuaFunctions: TList<PPointer>;
function DefaultLuaAlloc(ud, ptr: Pointer; osize, nsize: size_t): Pointer;
begin
if (nsize = 0) then
begin
FreeMemory(ptr);
Result := nil;
end else
Result := ReallocMemory(ptr, nsize);
end;
procedure LoadLuaLib(const AFileName: string = DefaultLuaLibName);
procedure Load(var AVariable: Pointer; const AName: string);
begin
AVariable := GetProcAddress(LuaLibHandle, PChar(AName));
LuaFunctions.Add(@AVariable);
end;
begin
UnloadLuaLib;
LuaLibHandle := SafeLoadLibrary(AFileName);
if LuaLibHandle = 0 then
RaiseLastOSError;
if not Assigned(LuaFunctions) then
LuaFunctions := TList<PPointer>.Create();
Load(@lua_newstate, 'lua_newstate');
Load(@lua_close, 'lua_close');
Load(@lua_newthread, 'lua_newthread');
Load(@lua_atpanic, 'lua_atpanic');
Load(@lua_version, 'lua_version');
Load(@lua_absindex, 'lua_absindex');
Load(@lua_gettop, 'lua_gettop');
Load(@lua_settop, 'lua_settop');
Load(@lua_pushvalue, 'lua_pushvalue');
Load(@lua_remove, 'lua_remove');
Load(@lua_insert, 'lua_insert');
Load(@lua_replace, 'lua_replace');
Load(@lua_copy, 'lua_copy');
Load(@lua_checkstack, 'lua_checkstack');
Load(@lua_xmove, 'lua_xmove');
Load(@lua_isnumber, 'lua_isnumber');
Load(@lua_isstring, 'lua_isstring');
Load(@lua_iscfunction, 'lua_iscfunction');
Load(@lua_isuserdata, 'lua_isuserdata');
Load(@lua_type, 'lua_type');
Load(@lua_typename, 'lua_typename');
Load(@lua_tonumberx, 'lua_tonumberx');
Load(@lua_tointegerx, 'lua_tointegerx');
Load(@lua_tounsignedx, 'lua_tounsignedx');
Load(@lua_toboolean, 'lua_toboolean');
Load(@lua_tolstring, 'lua_tolstring');
Load(@lua_rawlen, 'lua_rawlen');
Load(@lua_tocfunction, 'lua_tocfunction');
Load(@lua_touserdata, 'lua_touserdata');
Load(@lua_tothread, 'lua_tothread');
Load(@lua_topointer, 'lua_topointer');
Load(@lua_arith, 'lua_arith');
Load(@lua_rawequal, 'lua_rawequal');
Load(@lua_compare, 'lua_compare');
Load(@lua_pushnil, 'lua_pushnil');
Load(@lua_pushnumber, 'lua_pushnumber');
Load(@lua_pushinteger, 'lua_pushinteger');
Load(@lua_pushunsigned, 'lua_pushunsigned');
Load(@lua_pushlstring, 'lua_pushlstring');
Load(@lua_pushstring, 'lua_pushstring');
Load(@lua_pushvfstring, 'lua_pushvfstring');
Load(@lua_pushfstring, 'lua_pushfstring');
Load(@lua_pushcclosure, 'lua_pushcclosure');
Load(@lua_pushboolean, 'lua_pushboolean');
Load(@lua_pushlightuserdata, 'lua_pushlightuserdata');
Load(@lua_pushthread, 'lua_pushthread');
Load(@lua_getglobal, 'lua_getglobal');
Load(@lua_gettable, 'lua_gettable');
Load(@lua_getfield, 'lua_getfield');
Load(@lua_rawget, 'lua_rawget');
Load(@lua_rawgeti, 'lua_rawgeti');
Load(@lua_rawgetp, 'lua_rawgetp');
Load(@lua_newuserdata, 'lua_newuserdata');
Load(@lua_getmetatable, 'lua_getmetatable');
Load(@lua_getuservalue, 'lua_getuservalue');
Load(@lua_createtable, 'lua_createtable');
Load(@lua_setglobal, 'lua_setglobal');
Load(@lua_settable, 'lua_settable');
Load(@lua_setfield, 'lua_setfield');
Load(@lua_rawset, 'lua_rawset');
Load(@lua_rawseti, 'lua_rawseti');
Load(@lua_rawsetp, 'lua_rawsetp');
Load(@lua_setmetatable, 'lua_setmetatable');
Load(@lua_setuservalue, 'lua_setuservalue');
Load(@lua_callk, 'lua_callk');
Load(@lua_getctx, 'lua_getctx');
Load(@lua_pcallk, 'lua_pcallk');
Load(@lua_yieldk, 'lua_yieldk');
Load(@lua_resume, 'lua_resume');
Load(@lua_status, 'lua_status');
Load(@lua_gc, 'lua_gc');
Load(@lua_load, 'lua_load');
Load(@lua_dump, 'lua_dump');
Load(@lua_error, 'lua_error');
Load(@lua_next, 'lua_next');
Load(@lua_concat, 'lua_concat');
Load(@lua_len, 'lua_len');
Load(@lua_getallocf, 'lua_getallocf');
Load(@lua_setallocf, 'lua_setallocf');
Load(@lua_getstack, 'lua_getstack');
Load(@lua_getinfo, 'lua_getinfo');
Load(@lua_getlocal, 'lua_getlocal');
Load(@lua_setlocal, 'lua_setlocal');
Load(@lua_getupvalue, 'lua_getupvalue');
Load(@lua_setupvalue, 'lua_setupvalue');
Load(@lua_upvalueid, 'lua_upvalueid');
Load(@lua_upvaluejoin, 'lua_upvaluejoin');
Load(@lua_sethook, 'lua_sethook');
Load(@lua_gethook, 'lua_gethook');
Load(@lua_gethookmask, 'lua_gethookmask');
Load(@lua_gethookcount, 'lua_gethookcount');
Load(@luaopen_base, 'luaopen_base');
Load(@luaopen_coroutine, 'luaopen_coroutine');
Load(@luaopen_table, 'luaopen_table');
Load(@luaopen_io, 'luaopen_io');
Load(@luaopen_os, 'luaopen_os');
Load(@luaopen_string, 'luaopen_string');
Load(@luaopen_bit32, 'luaopen_bit32');
Load(@luaopen_math, 'luaopen_math');
Load(@luaopen_debug, 'luaopen_debug');
Load(@luaopen_package, 'luaopen_package');
Load(@luaL_openlibs, 'luaL_openlibs');
Load(@luaL_requiref, 'luaL_requiref');
Load(@luaL_setfuncs, 'luaL_setfuncs');
end;
procedure UnloadLuaLib;
var
variable: PPointer;
begin
if Assigned(LuaFunctions) then
begin
for variable in LuaFunctions do
variable^ := nil;
end;
if LuaLibLoaded then
begin
FreeLibrary(LuaLibHandle);
LuaLibHandle := 0;
end;
end;
function LuaLibLoaded: Boolean;
begin
Result := (LuaLibHandle <> 0);
end;
{ Macros }
function lua_upvalueindex(idx: Integer): Integer;
begin
Result := (LUA_REGISTRYINDEX - idx);
end;
procedure lua_call(L: lua_State; nargs, nresults: Integer);
begin
lua_callk(L, nargs, nresults, 0, nil);
end;
function lua_pcall(L: lua_State; nargs, nresults, errfunc: Integer): Integer;
begin
Result := lua_pcallk(L, nargs, nresults, errfunc, 0, nil);
end;
function lua_yield(L: lua_State; nresults: Integer): Integer;
begin
Result := lua_yieldk(L, nresults, 0, nil);
end;
function lua_tonumber(L: lua_State; idx: Integer): lua_Number;
begin
Result := lua_tonumberx(L, idx, nil);
end;
function lua_tointeger(L: lua_State; idx: Integer): lua_Integer;
begin
Result := lua_tointegerx(L, idx, nil);
end;
function lua_tounsigned(L: lua_State; idx: Integer): lua_Unsigned;
begin
Result := lua_tounsignedx(L, idx, nil);
end;
procedure lua_pop(L: lua_State; n: Integer);
begin
lua_settop(L, -(n) - 1);
end;
procedure lua_newtable(L: lua_State); inline;
begin
lua_createtable(L, 0, 0);
end;
procedure lua_register(L: lua_State; name: PAnsiChar; f: lua_CFunction); inline;
begin
lua_pushcfunction(L, f);
lua_setglobal(L, name);
end;
procedure lua_pushcfunction(L: lua_State; f: lua_CFunction);
begin
lua_pushcclosure(L, f, 0);
end;
function lua_isfunction(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TFUNCTION;
end;
function lua_istable(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TTABLE;
end;
function lua_islightuserdata(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TLIGHTUSERDATA;
end;
function lua_isnil(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TNIL;
end;
function lua_isboolean(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TBOOLEAN;
end;
function lua_isthread(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TTHREAD;
end;
function lua_isnone(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) = LUA_TNONE;
end;
function lua_isnoneornil(L: lua_State; n: Integer): Boolean;
begin
Result := lua_type(L, n) <= 0;
end;
function lua_pushliteral(L: lua_State; const s: AnsiString): PAnsiChar;
begin
Result := lua_pushlstring(L, PAnsiChar(s), Length(s));
end;
procedure lua_pushglobaltable(L: lua_State);
begin
lua_rawgeti(L, LUA_REGISTRYINDEX, LUA_RIDX_GLOBALS);
end;
function lua_tostring(L: lua_State; idx: Integer): PAnsiChar;
begin
Result := lua_tolstring(L, idx, nil);
end;
procedure luaL_where(L: lua_State; level: Integer);
var
ar: lua_Debug;
msg: AnsiString;
begin
if (lua_getstack(L, level, ar) <> 0) then // check function at level
begin
lua_getinfo(L, 'Sl', ar); // get info about it
if (ar.currentline > 0) then // is there info?
begin
msg := AnsiString(Format('%s:%d: ', [ar.short_src, ar.currentline]));
lua_pushlstring(L, PAnsiChar(msg), Length(msg));
exit
end;
end;
lua_pushliteral(L, ''); // else, no information available...
end;
function luaL_error(L: lua_State; fmt: PAnsiChar; argp: Pointer): Integer;
begin
luaL_where(L, 1);
lua_pushvfstring(L, fmt, argp);
lua_concat(L, 2);
Result := lua_error(L);
end;
initialization
finalization
UnloadLuaLib;
FreeAndNil(LuaFunctions);
end.
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