--- /dev/null
+! Copyright (C) 2010 Erik Charlebois.
+! See http://factorcode.org/license.txt for BSD license.
+USING: accessors alien alien.accessors alien.c-types alien.libraries
+alien.syntax classes.struct combinators io.encodings.ascii kernel
+literals locals math system ;
+IN: lua
+
+<< "liblua5.1" {
+ { [ os windows? ] [ "lua5.1.dll" ] }
+ { [ os macosx? ] [ "liblua5.1.dylib" ] }
+ { [ os unix? ] [ "liblua5.1.so" ] }
+ } cond cdecl add-library >>
+LIBRARY: liblua5.1
+
+! luaconf.h
+TYPEDEF: double LUA_NUMBER
+TYPEDEF: ptrdiff_t LUA_INTEGER
+
+CONSTANT: LUA_IDSIZE 60
+
+! This is normally the BUFSIZ value of the given platform.
+CONSTANT: LUAL_BUFFERSIZE $[
+ {
+ { [ os windows? ] [ 512 ] }
+ { [ os macosx? ] [ 1024 ] }
+ { [ os unix? ] [ 8192 ] }
+ } cond ]
+
+! lua.h
+CONSTANT: LUA_SIGNATURE B{ 27 76 117 97 }
+CONSTANT: LUA_MULTRET -1
+
+CONSTANT: LUA_REGISTRYINDEX -10000
+CONSTANT: LUA_ENVIRONINDEX -10001
+CONSTANT: LUA_GLOBALSINDEX -10002
+
+: lua_upvalueindex ( i -- i ) [ LUA_GLOBALSINDEX ] dip - ; inline
+
+CONSTANT: LUA_YIELD 1
+CONSTANT: LUA_ERRRUN 2
+CONSTANT: LUA_ERRSYNTAX 3
+CONSTANT: LUA_ERRMEM 4
+CONSTANT: LUA_ERRERR 5
+
+C-TYPE: lua_State
+
+CALLBACK: int lua_CFunction ( lua_State* L ) ;
+CALLBACK: char* lua_Reader ( lua_State* L, void* ud, size_t* sz ) ;
+CALLBACK: int lua_Writer ( lua_State* L, void* p, size_t sz, void* ud ) ;
+CALLBACK: void* lua_Alloc ( void* ud, void* ptr, size_t osize, size_t nsize ) ;
+
+CONSTANT: LUA_TNONE -1
+CONSTANT: LUA_TNIL 0
+CONSTANT: LUA_TBOOLEAN 1
+CONSTANT: LUA_TLIGHTUSERDATA 2
+CONSTANT: LUA_TNUMBER 3
+CONSTANT: LUA_TSTRING 4
+CONSTANT: LUA_TTABLE 5
+CONSTANT: LUA_TFUNCTION 6
+CONSTANT: LUA_TUSERDATA 7
+CONSTANT: LUA_TTHREAD 8
+
+CONSTANT: LUA_MINSTACK 20
+
+TYPEDEF: LUA_NUMBER lua_Number
+TYPEDEF: LUA_INTEGER lua_Integer
+
+FUNCTION: lua_State* lua_newstate ( lua_Alloc f, void* ud ) ;
+FUNCTION: void lua_close ( lua_State* L ) ;
+FUNCTION: lua_State* lua_newthread ( lua_State* L ) ;
+
+FUNCTION: lua_CFunction lua_atpanic ( lua_State* L, lua_CFunction panicf ) ;
+
+FUNCTION: int lua_gettop ( lua_State* L ) ;
+FUNCTION: void lua_settop ( lua_State* L, int idx ) ;
+FUNCTION: void lua_pushvalue ( lua_State* L, int idx ) ;
+FUNCTION: void lua_remove ( lua_State* L, int idx ) ;
+FUNCTION: void lua_insert ( lua_State* L, int idx ) ;
+FUNCTION: void lua_replace ( lua_State* L, int idx ) ;
+FUNCTION: int lua_checkstack ( lua_State* L, int sz ) ;
+
+FUNCTION: void lua_xmove ( lua_State* from, lua_State* to, int n ) ;
+
+FUNCTION: int lua_isnumber ( lua_State* L, int idx ) ;
+FUNCTION: int lua_isstring ( lua_State* L, int idx ) ;
+FUNCTION: int lua_iscfunction ( lua_State* L, int idx ) ;
+FUNCTION: int lua_isuserdata ( lua_State* L, int idx ) ;
+FUNCTION: int lua_type ( lua_State* L, int idx ) ;
+FUNCTION: c-string[ascii] lua_typename ( lua_State* L, int tp ) ;
+
+FUNCTION: int lua_equal ( lua_State* L, int idx1, int idx2 ) ;
+FUNCTION: int lua_rawequal ( lua_State* L, int idx1, int idx2 ) ;
+FUNCTION: int lua_lessthan ( lua_State* L, int idx1, int idx2 ) ;
+
+FUNCTION: lua_Number lua_tonumber ( lua_State* L, int idx ) ;
+FUNCTION: lua_Integer lua_tointeger ( lua_State* L, int idx ) ;
+FUNCTION: int lua_toboolean ( lua_State* L, int idx ) ;
+FUNCTION: c-string[ascii] lua_tolstring ( lua_State* L, int idx, size_t* len ) ;
+FUNCTION: size_t lua_objlen ( lua_State* L, int idx ) ;
+FUNCTION: lua_CFunction lua_tocfunction ( lua_State* L, int idx ) ;
+FUNCTION: void* lua_touserdata ( lua_State* L, int idx ) ;
+FUNCTION: lua_State* lua_tothread ( lua_State* L, int idx ) ;
+FUNCTION: void* lua_topointer ( lua_State* L, int idx ) ;
+
+FUNCTION: void lua_pushnil ( lua_State* L ) ;
+FUNCTION: void lua_pushnumber ( lua_State* L, lua_Number n ) ;
+FUNCTION: void lua_pushinteger ( lua_State* L, lua_Integer n ) ;
+FUNCTION: void lua_pushlstring ( lua_State* L, char* s, size_t l ) ;
+FUNCTION: void lua_pushstring ( lua_State* L, c-string[ascii] ) ;
+! FUNCTION: c-string[ascii] lua_pushvfstring ( lua_State* L, c-string[ascii] fmt, va_list argp ) ;
+! FUNCTION: c-string[ascii] lua_pushfstring ( lua_State* L, c-string[ascii] fmt, ... ) ;
+FUNCTION: void lua_pushcclosure ( lua_State* L, lua_CFunction fn, int n ) ;
+FUNCTION: void lua_pushboolean ( lua_State* L, int b ) ;
+FUNCTION: void lua_pushlightuserdata ( lua_State* L, void* p ) ;
+FUNCTION: int lua_pushthread ( lua_State* L ) ;
+
+FUNCTION: void lua_gettable ( lua_State* L, int idx ) ;
+FUNCTION: void lua_getfield ( lua_State* L, int idx, c-string[ascii] k ) ;
+FUNCTION: void lua_rawget ( lua_State* L, int idx ) ;
+FUNCTION: void lua_rawgeti ( lua_State* L, int idx, int n ) ;
+FUNCTION: void lua_createtable ( lua_State* L, int narr, int nrec ) ;
+FUNCTION: void* lua_newuserdata ( lua_State* L, size_t sz ) ;
+FUNCTION: int lua_getmetatable ( lua_State* L, int objindex ) ;
+FUNCTION: void lua_getfenv ( lua_State* L, int idx ) ;
+
+FUNCTION: void lua_settable ( lua_State* L, int idx ) ;
+FUNCTION: void lua_setfield ( lua_State* L, int idx, c-string[ascii] k ) ;
+FUNCTION: void lua_rawset ( lua_State* L, int idx ) ;
+FUNCTION: void lua_rawseti ( lua_State* L, int idx, int n ) ;
+FUNCTION: int lua_setmetatable ( lua_State* L, int objindex ) ;
+FUNCTION: int lua_setfenv ( lua_State* L, int idx ) ;
+
+FUNCTION: void lua_call ( lua_State* L, int nargs, int nresults ) ;
+FUNCTION: int lua_pcall ( lua_State* L, int nargs, int nresults, int errfunc ) ;
+FUNCTION: int lua_cpcall ( lua_State* L, lua_CFunction func, void* ud ) ;
+FUNCTION: int lua_load ( lua_State* L, lua_Reader reader, void* dt, c-string[ascii] chunkname ) ;
+
+FUNCTION: int lua_dump ( lua_State* L, lua_Writer writer, void* data ) ;
+
+FUNCTION: int lua_yield ( lua_State* L, int nresults ) ;
+FUNCTION: int lua_resume ( lua_State* L, int narg ) ;
+FUNCTION: int lua_status ( lua_State* L ) ;
+
+CONSTANT: LUA_GCSTOP 0
+CONSTANT: LUA_GCRESTART 1
+CONSTANT: LUA_GCCOLLECT 2
+CONSTANT: LUA_GCCOUNT 3
+CONSTANT: LUA_GCCOUNTB 4
+CONSTANT: LUA_GCSTEP 5
+CONSTANT: LUA_GCSETPAUSE 6
+CONSTANT: LUA_GCSETSTEPMUL 7
+
+FUNCTION: int lua_gc ( lua_State* L, int what, int data ) ;
+
+FUNCTION: int lua_error ( lua_State* L ) ;
+FUNCTION: int lua_next ( lua_State* L, int idx ) ;
+FUNCTION: void lua_concat ( lua_State* L, int n ) ;
+FUNCTION: lua_Alloc lua_getallocf ( lua_State* L, void* *ud ) ;
+FUNCTION: void lua_setallocf ( lua_State* L, lua_Alloc f, void* ud ) ;
+
+TYPEDEF: lua_Reader lua_Chunkreader
+TYPEDEF: lua_Writer lua_Chunkwriter
+
+FUNCTION: void lua_setlevel ( lua_State* from, lua_State* to ) ;
+
+CONSTANT: LUA_HOOKCALL 0
+CONSTANT: LUA_HOOKRET 1
+CONSTANT: LUA_HOOKLINE 2
+CONSTANT: LUA_HOOKCOUNT 3
+CONSTANT: LUA_HOOKTAILRET 4
+
+: LUA_MASKCALL ( n -- n ) LUA_HOOKCALL shift ; inline
+: LUA_MASKRET ( n -- n ) LUA_HOOKRET shift ; inline
+: LUA_MASKLINE ( n -- n ) LUA_HOOKLINE shift ; inline
+: LUA_MASKCOUNT ( n -- n ) LUA_HOOKCOUNT shift ; inline
+
+C-TYPE: lua_Debug
+CALLBACK: void lua_Hook ( lua_State* L, lua_Debug* ar ) ;
+
+FUNCTION: int lua_getstack ( lua_State* L, int level, lua_Debug* ar ) ;
+FUNCTION: int lua_getinfo ( lua_State* L, c-string[ascii] what, lua_Debug* ar ) ;
+FUNCTION: c-string[ascii] lua_getlocal ( lua_State* L, lua_Debug* ar, int n ) ;
+FUNCTION: c-string[ascii] lua_setlocal ( lua_State* L, lua_Debug* ar, int n ) ;
+FUNCTION: c-string[ascii] lua_getupvalue ( lua_State* L, int funcindex, int n ) ;
+FUNCTION: c-string[ascii] lua_setupvalue ( lua_State* L, int funcindex, int n ) ;
+
+FUNCTION: int lua_sethook ( lua_State* L, lua_Hook func, int mask, int count ) ;
+FUNCTION: lua_Hook lua_gethook ( lua_State* L ) ;
+FUNCTION: int lua_gethookmask ( lua_State* L ) ;
+FUNCTION: int lua_gethookcount ( lua_State* L ) ;
+
+STRUCT: lua_Debug
+ { event int }
+ { name char* }
+ { namewhat char* }
+ { what char* }
+ { source char* }
+ { currentline int }
+ { nups int }
+ { linedefined int }
+ { lastlinedefined int }
+ { short_src char[LUA_IDSIZE] }
+ { i_ci int } ;
+
+! lauxlib.h
+
+: luaL_getn ( L i -- int ) lua_objlen ; inline
+: luaL_setn ( L i j -- ) 3drop ; inline
+
+CONSTANT: LUA_ERRFILE $[ $ LUA_ERRERR 1 + ]
+
+STRUCT: luaL_Reg
+ { name char* }
+ { func lua_CFunction } ;
+
+FUNCTION: void luaI_openlib ( lua_State* L, c-string[ascii] libname, luaL_Reg* l, int nup ) ;
+FUNCTION: void luaL_register ( lua_State* L, c-string[ascii] libname, luaL_Reg* l ) ;
+FUNCTION: int luaL_getmetafield ( lua_State* L, int obj, c-string[ascii] e ) ;
+FUNCTION: int luaL_callmeta ( lua_State* L, int obj, c-string[ascii] e ) ;
+FUNCTION: int luaL_typerror ( lua_State* L, int narg, c-string[ascii] tname ) ;
+FUNCTION: int luaL_argerror ( lua_State* L, int numarg, c-string[ascii] extramsg ) ;
+FUNCTION: c-string[ascii] luaL_checklstring ( lua_State* L, int numArg, size_t* l ) ;
+FUNCTION: c-string[ascii] luaL_optlstring ( lua_State* L, int numArg, c-string[ascii] def, size_t* l ) ;
+FUNCTION: lua_Number luaL_checknumber ( lua_State* L, int numArg ) ;
+FUNCTION: lua_Number luaL_optnumber ( lua_State* L, int nArg, lua_Number def ) ;
+
+FUNCTION: lua_Integer luaL_checkinteger ( lua_State* L, int numArg ) ;
+FUNCTION: lua_Integer luaL_optinteger ( lua_State* L, int nArg, lua_Integer def ) ;
+
+FUNCTION: void luaL_checkstack ( lua_State* L, int sz, c-string[ascii] msg ) ;
+FUNCTION: void luaL_checktype ( lua_State* L, int narg, int t ) ;
+FUNCTION: void luaL_checkany ( lua_State* L, int narg ) ;
+
+FUNCTION: int luaL_newmetatable ( lua_State* L, c-string[ascii] tname ) ;
+FUNCTION: void* luaL_checkudata ( lua_State* L, int ud, c-string[ascii] tname ) ;
+
+FUNCTION: void luaL_where ( lua_State* L, int lvl ) ;
+! FUNCTION: int luaL_error ( lua_State* L, c-string[ascii] fmt, ... ) ;
+FUNCTION: int luaL_checkoption ( lua_State* L, int narg, c-string[ascii] def, c-string[ascii] lst ) ;
+
+FUNCTION: int luaL_ref ( lua_State* L, int t ) ;
+FUNCTION: void luaL_unref ( lua_State* L, int t, int ref ) ;
+
+FUNCTION: int luaL_loadfile ( lua_State* L, c-string[ascii] filename ) ;
+FUNCTION: int luaL_loadbuffer ( lua_State* L, c-string[ascii] buff, size_t sz, c-string[ascii] name ) ;
+FUNCTION: int luaL_loadstring ( lua_State* L, c-string[ascii] s ) ;
+
+FUNCTION: lua_State* luaL_newstate ( ) ;
+FUNCTION: c-string[ascii] luaL_gsub ( lua_State* L, c-string[ascii] s, c-string[ascii] p, c-string[ascii] r ) ;
+FUNCTION: c-string[ascii] luaL_findtable ( lua_State* L, int idx, c-string[ascii] fname, int szhint ) ;
+
+: lua_pop ( L n -- ) neg 1 - lua_settop ; inline
+: lua_newtable ( L -- ) 0 0 lua_createtable ; inline
+: lua_pushcfunction ( L f -- ) 0 lua_pushcclosure ; inline
+: lua_setglobal ( L s -- ) [ LUA_GLOBALSINDEX ] dip lua_setfield ; inline
+: lua_register ( L n f -- ) pick swap lua_pushcfunction lua_setglobal ; inline
+: lua_strlen ( L i -- size_t ) lua_objlen ; inline
+: lua_isfunction ( L n -- ? ) lua_type LUA_TFUNCTION = ; inline
+: lua_istable ( L n -- ? ) lua_type LUA_TTABLE = ; inline
+: lua_islightuserdata ( L n -- ? ) lua_type LUA_TLIGHTUSERDATA = ; inline
+: lua_isnil ( L n -- ? ) lua_type LUA_TNIL = ; inline
+: lua_isboolean ( L n -- ? ) lua_type LUA_TBOOLEAN = ; inline
+: lua_isthread ( L n -- ? ) lua_type LUA_TTHREAD = ; inline
+: lua_isnone ( L n -- ? ) lua_type LUA_TNONE = ; inline
+: lua_isnoneornil ( L n -- ? ) lua_type 0 <= ; inline
+: lua_getglobal ( L s -- ) [ LUA_GLOBALSINDEX ] dip lua_getfield ; inline
+: lua_tostring ( L i -- string ) f lua_tolstring ; inline
+: lua_open ( -- lua_State* ) luaL_newstate ; inline
+: lua_getregistry ( L -- ) LUA_REGISTRYINDEX lua_pushvalue ; inline
+: lua_getgccount ( L -- int ) LUA_GCCOUNT 0 lua_gc ; inline
+
+: luaL_argcheck ( L cond numarg extramsg -- int ) rot 0 = [ luaL_argerror ] [ 3drop 1 ] if ; inline
+: luaL_checkstring ( L n -- string ) f luaL_checklstring ; inline
+: luaL_optstring ( L n d -- string ) f luaL_optlstring ; inline
+: luaL_checkint ( L n -- int ) luaL_checkinteger ; inline
+: luaL_optint ( L n d -- int ) luaL_optinteger ; inline
+: luaL_checklong ( L n -- long ) luaL_checkinteger ; inline
+: luaL_optlong ( L n d -- long ) luaL_optinteger ; inline
+
+: luaL_typename ( L i -- string ) dupd lua_type lua_typename ; inline
+: luaL_dofile ( L fn -- int )
+ dupd luaL_loadfile 0 = [
+ 0 LUA_MULTRET 0 lua_pcall
+ ] [ drop 1 ] if ; inline
+: luaL_dostring ( L s -- int )
+ dupd luaL_loadstring 0 = [
+ 0 LUA_MULTRET 0 lua_pcall
+ ] [ drop 1 ] if ; inline
+
+: luaL_getmetatable ( L n -- ) [ LUA_REGISTRYINDEX ] dip lua_getfield ; inline
+
+STRUCT: luaL_Buffer
+ { p char* }
+ { lvl int }
+ { L lua_State* }
+ { buffer char[LUAL_BUFFERSIZE] } ;
+
+FUNCTION: void luaL_buffinit ( lua_State* L, luaL_Buffer* B ) ;
+FUNCTION: char* luaL_prepbuffer ( luaL_Buffer* B ) ;
+FUNCTION: void luaL_addlstring ( luaL_Buffer* B, char* s, size_t l ) ;
+FUNCTION: void luaL_addstring ( luaL_Buffer* B, char* s ) ;
+FUNCTION: void luaL_addvalue ( luaL_Buffer* B ) ;
+FUNCTION: void luaL_pushresult ( luaL_Buffer* B ) ;
+
+:: luaL_addchar ( B c -- )
+ B p>> alien-address
+ LUAL_BUFFERSIZE B buffer>> <displaced-alien> alien-address
+ >= [ B luaL_prepbuffer drop ] when
+ c B p>> 0 set-alien-signed-1
+ B [ 1 swap <displaced-alien> ] change-p drop ; inline
+
+: luaL_putchar ( B c -- ) luaL_addchar ; inline
+: luaL_addsize ( B n -- ) [ swap <displaced-alien> ] curry change-p drop ; inline
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