source: trunk/src/lua/lua_raw.cc @ 495

// Copyright (C) 2012-2015 ChaosForge Ltd
// http://chaosforge.org/
//
// This file is part of Nova libraries. 
// For conditions of distribution and use, see copying.txt file in root folder.

#include "nv/lua/lua_raw.hh"

nv::string64 nlua_typecontent( lua_State* L, int idx )
{
        int type = lua_type( L, idx );
        switch ( type )
        {
        case LUA_TNONE          : return nv::string64( "NONE" );
        case LUA_TNIL               : return nv::string64( "NIL" );
        case LUA_TBOOLEAN               : return nv::string64( lua_toboolean( L, idx ) == 0 ? "false" : "true" );
        case LUA_TSTRING                : return nv::string64( nlua_tostringview( L, idx ) );
        case LUA_TTABLE             : return nv::string64( "TABLE" );
        case LUA_TFUNCTION              : return nv::string64( "FUNCTION" );
        case LUA_TTHREAD                : return nv::string64( "THREAD" );
        default : break; 
        }
        if ( type == LUA_TLIGHTUSERDATA || type == LUA_TUSERDATA )
        {
                nv::string64 buffer;
                buffer.append( nv::uint64( lua_touserdata( L, idx ) ) );
                return buffer;
        }
        else if ( type == LUA_TNUMBER )
        {
                nv::string64 buffer;
                buffer.append( nv::uint64( lua_touserdata( L, idx ) ) );
                return buffer;
        }
        return nv::string64( "UNKNOWN!" );
}

void nlua_pushreversed( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        int len = static_cast<int>( nlua_rawlen( L, index ) );
        int i   = len;
        lua_createtable( L, len, 0 );
        while ( i != 0 )
        {
                lua_rawgeti( L, index, i );
                lua_rawseti( L, -2, len-i+1 );
                i--;
        }
}


void nlua_shallowcopy( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_createtable( L, 0, 0 );
        lua_pushnil( L );

        while ( lua_next( L, index ) != 0 )
        {
                lua_pushvalue( L, -2 );
                lua_insert( L, -2 );
                lua_settable( L, -4 );
        }
}

void nlua_shallowicopy( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_createtable( L, 0, 0 );
        int i = 0;
        for(;;) 
        {
                i++;
                lua_rawgeti( L, 1, i );
                if ( lua_isnil( L, -1 ) ) 
                {
                        lua_pop( L, 1 );
                        break;
                }
                lua_rawseti( L, 2, i );
        };
}

void nlua_shallowmerge( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_pushnil( L );

        while( lua_next( L, index ) != 0 )
        {
                lua_pushvalue( L, -2 );
                lua_insert( L, -2 );
                lua_rawset( L, -4 );
        }
}

void nlua_deepcopy( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_createtable( L, 0, 0 );
        lua_pushnil( L );

        while ( lua_next( L, index ) != 0 )
        {
                if ( lua_istable( L, -1 ) )
                {
                        nlua_deepcopy( L, -1 );
                        lua_insert( L, -2 );
                        lua_pop( L, 1 );
                }
                lua_pushvalue( L, -2 );
                lua_insert( L, -2 );
                lua_settable( L, -4 );
        }
}

void nlua_toset( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_createtable( L, 0, 0 );
        int i = 0;
        for(;;) 
        {
                i++;
                lua_rawgeti( L, index, i );
                if ( lua_isnil( L, -1 ) ) 
                {
                        lua_pop( L, 1 );
                        break;
                }
                lua_pushboolean( L, true );
                lua_rawset( L, -3 );
        };
}

void nlua_tokeyset( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        lua_createtable( L, 0, 0 );
        lua_pushnil( L );
        while ( lua_next( L, index ) != 0 )
        {
                lua_pushvalue( L, -2 );
                lua_pushboolean( L, true );
                lua_settable( L, -5 );
                lua_pop( L, 1 );
        }
}

void nlua_register( lua_State *L, const char* fname, lua_CFunction func, int index )
{
        index = nlua_absindex( L, index );
        lua_pushstring( L, fname );
        lua_pushcfunction( L, func );
        lua_rawset( L, index );
}

void nlua_register( lua_State *L, const luaL_Reg *l, int index )
{
        index = nlua_absindex( L, index );
        for (; l->name != NULL; l++) 
        {
                lua_pushstring( L, l->name );
                lua_pushcfunction( L, l->func );
                lua_rawset( L, index );
        }
}

void nlua_register( lua_State *L, const char* lname, const char* fname, lua_CFunction func )
{
        lua_getglobal( L, lname );
        if ( !lua_istable( L, -1 ) )
        {
                lua_pop( L, 1 );
                lua_createtable( L, 0, 0 );
                nlua_register( L, fname, func, -1 );
                lua_setglobal( L, lname );
                return;
        }
        nlua_register( L, fname, func, -1 );
        lua_pop( L, 1 );
}

void nlua_register( lua_State *L, const char* lname, const luaL_Reg *l )
{
        lua_getglobal( L, lname );
        if ( !lua_istable( L, -1 ) )
        {
                lua_pop( L, 1 );
                lua_createtable( L, 0, 0 );
                nlua_register( L, l, -1 );
                lua_setglobal( L, lname );
                return;
        }
        nlua_register( L, l, -1 );
        lua_pop( L, 1 );
}

void nlua_toflags( lua_State *L, int index, nv::uint8* data, nv::uint32 count )
{
        index = nlua_absindex( L, index );
        nv::uint32 flag;
        if ( lua_istable( L, index ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, index ) != 0 )
                {
                        if ( lua_type( L, -1 ) == LUA_TBOOLEAN )
                                flag = static_cast< nv::uint32 >( lua_tointeger( L ,-2 ) );
                        else
                                flag = static_cast< nv::uint32 >( lua_tointeger( L ,-1 ) );
                        lua_pop( L, 1 );
                        if ( flag < count )
                        {
                                data[ flag / 8 ] |= ( 1 << static_cast< nv::uint8 >( flag % 8 ) );
                        }
                }
        }
}

void nlua_toflags_set( lua_State *L, int index, nv::uint8* data, nv::uint32 count )
{
        index = nlua_absindex( L, index );
        nv::uint32 flag;
        if ( lua_istable( L, index ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, index ) != 0 )
                {
                        flag = static_cast< nv::uint32 >( lua_tointeger( L ,-2 ) );
                        lua_pop( L, 1 );
                        if ( flag < count )
                        {
                                data[ flag / 8 ] |= ( 1 << static_cast< nv::uint8 >( flag % 8 ) );
                        }
                }
        }
}

void nlua_toflags_array( lua_State *L, int index, nv::uint8* data, nv::uint32 count )
{
        index = nlua_absindex( L, index );
        nv::uint32 flag;
        if ( lua_istable( L, index ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, index ) != 0 )
                {
                        flag = static_cast< nv::uint32 >( lua_tointeger( L ,-1 ) );
                        lua_pop( L, 1 );
                        if ( flag < count )
                        {
                                data[ flag / 8 ] |= ( 1 << static_cast< nv::uint8 >( flag % 8 ) );
                        }
                }
        }
}

nv::vector<nv::uint8> nlua_tobytearray( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        nv::vector<nv::uint8> result;
        if ( lua_istable( L, index ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, index ) != 0 )
                {
                        result.push_back( static_cast<nv::uint8>( lua_tointeger( L, -1 ) ) );
                        lua_pop( L, 1 );
                }
        }
        return result;
}

nv::vector<nv::uint32> nlua_tou32array( lua_State *L, int index )
{
        index = nlua_absindex( L, index );
        nv::vector<nv::uint32> result;
        if ( lua_istable( L, index ) )
        {
                lua_pushnil( L );
                while ( lua_next( L, index ) != 0 )
                {
                        result.push_back( static_cast<nv::uint32>( lua_tointeger( L, -1 ) ) );
                        lua_pop( L, 1 );
                }
        }
        return result;
}

void * nlua_testudata( lua_State *L, int ud, const char *tname )
{
        void *p = lua_touserdata( L, ud );
        if ( p != NULL )
        {
                if ( lua_getmetatable( L, ud ) )
                {
                        luaL_getmetatable( L, tname );
                        if ( !lua_rawequal( L, -1, -2 ) )
                                p = NULL;
                        lua_pop( L, 2 );
                        return p;
                }
        }
        return NULL;
}

void nlua_setmetatable( lua_State *L, const char *tname )
{
        int only_works_for_51;
        luaL_getmetatable( L, tname );
        lua_setmetatable( L, -2 );
}

void nlua_requiref( lua_State *L, const char *modname, lua_CFunction openf, int glb )
{
        int only_works_for_51;
        lua_pushcfunction( L, openf );
        lua_pushstring( L, modname );
        lua_call( L, 1, 1 );
        if ( glb != 0 )
        {
                lua_pushvalue( L, LUA_GLOBALSINDEX );
                lua_pushvalue( L, -2 );
                lua_setfield( L, -2, modname );
                lua_pop( L, 1 );
        }
}

int nlua_rawlen( lua_State* L, int index )
{
        return lua_objlen( L, index );
}

void nlua_pushglobaltable( lua_State* L )
{
        int only_works_for_51;
        lua_pushvalue( L, LUA_GLOBALSINDEX );
}