virtualx-engine/core/variant_parser.cpp

/*************************************************************************/
/*  variant_parser.cpp                                                   */
/*************************************************************************/
/*                       This file is part of:                           */
/*                           GODOT ENGINE                                */
/*                    http://www.godotengine.org                         */
/*************************************************************************/
/* Copyright (c) 2007-2016 Juan Linietsky, Ariel Manzur.                 */
/*                                                                       */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the       */
/* "Software"), to deal in the Software without restriction, including   */
/* without limitation the rights to use, copy, modify, merge, publish,   */
/* distribute, sublicense, and/or sell copies of the Software, and to    */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions:                                             */
/*                                                                       */
/* The above copyright notice and this permission notice shall be        */
/* included in all copies or substantial portions of the Software.       */
/*                                                                       */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,       */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF    */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY  */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,  */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE     */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.                */
/*************************************************************************/
#include "variant_parser.h"
#include "io/resource_loader.h"
#include "os/keyboard.h"



CharType VariantParser::StreamFile::get_char() {

	return f->get_8();
}

bool VariantParser::StreamFile::is_utf8() const {

	return true;
}
bool VariantParser::StreamFile::is_eof() const {

	return f->eof_reached();
}


CharType VariantParser::StreamString::get_char() {

	if (pos>=s.length())
		return 0;
	else
		return s[pos++];
}

bool VariantParser::StreamString::is_utf8() const {
	return false;
}
bool VariantParser::StreamString::is_eof() const {
	return pos>s.length();
}


/////////////////////////////////////////////////////////////////////////////////////////////////



const char * VariantParser::tk_name[TK_MAX] = {
	"'{'",
	"'}'",
	"'['",
	"']'",
	"'('",
	"')'",
	"identifier",
	"string",
	"number",
	"color",
	"':'",
	"','",
	"'.'",
	"'='",
	"EOF",
	"ERROR"
};



Error VariantParser::get_token(Stream *p_stream, Token& r_token, int &line, String &r_err_str) {

	while (true) {

		CharType cchar;
		if (p_stream->saved) {
			cchar=p_stream->saved;
			p_stream->saved=0;
		} else {
			cchar=p_stream->get_char();
			if (p_stream->is_eof()) {
				r_token.type=TK_EOF;
				return OK;
			}
		}

		switch(cchar) {

			case '\n': {

				line++;
				break;
			};
			case 0: {
				r_token.type=TK_EOF;
				return OK;
			} break;
			case '{': {

				r_token.type=TK_CURLY_BRACKET_OPEN;
				return OK;
			};
			case '}': {

				r_token.type=TK_CURLY_BRACKET_CLOSE;
				return OK;
			};
			case '[': {

				r_token.type=TK_BRACKET_OPEN;
				return OK;
			};
			case ']': {

				r_token.type=TK_BRACKET_CLOSE;
				return OK;
			};
			case '(': {

				r_token.type=TK_PARENTHESIS_OPEN;
				return OK;
			};
			case ')': {

				r_token.type=TK_PARENTHESIS_CLOSE;
				return OK;
			};
			case ':': {

				r_token.type=TK_COLON;
				return OK;
			};
			case ';': {

				while(true) {
					CharType ch=p_stream->get_char();
					if (p_stream->is_eof()) {
						r_token.type=TK_EOF;
						return OK;
					}
					if (ch=='\n')
						break;
				}

				break;
			};
			case ',': {

				r_token.type=TK_COMMA;
				return OK;
			};
			case '.': {

				r_token.type=TK_PERIOD;
				return OK;
			};
			case '=': {

				r_token.type=TK_EQUAL;
				return OK;
			};
			case '#': {


				String color_str="#";
				while(true) {
					CharType ch=p_stream->get_char();
					if (p_stream->is_eof()) {
						r_token.type=TK_EOF;
						return OK;
					} else if ( (ch>='0' && ch<='9') || (ch>='a' && ch<='f') || (ch>='A' && ch<='F') ) {
						color_str+=String::chr(ch);

					} else {
						p_stream->saved=ch;
						break;
					}
				}

				r_token.value=Color::html(color_str);
				r_token.type=TK_COLOR;
				return OK;

			};
			case '"': {


				String str;
				while(true) {

					CharType ch=p_stream->get_char();

					if (ch==0) {
						r_err_str="Unterminated String";
						r_token.type=TK_ERROR;
						return ERR_PARSE_ERROR;
					} else if (ch=='"') {
						break;
					} else if (ch=='\\') {
						//escaped characters...
						CharType next = p_stream->get_char();
						if (next==0) {
							r_err_str="Unterminated String";
							r_token.type=TK_ERROR;
							return  ERR_PARSE_ERROR;
						}
						CharType res=0;

						switch(next) {

							case 'b': res=8; break;
							case 't': res=9; break;
							case 'n': res=10; break;
							case 'f': res=12; break;
							case 'r': res=13; break;
							case 'u': {
								//hexnumbarh - oct is deprecated


								for(int j=0;j<4;j++) {
									CharType c = p_stream->get_char();
									if (c==0) {
										r_err_str="Unterminated String";
										r_token.type=TK_ERROR;
										return ERR_PARSE_ERROR;
									}
									if (!((c>='0' && c<='9') || (c>='a' && c<='f') || (c>='A' && c<='F'))) {

										r_err_str="Malformed hex constant in string";
										r_token.type=TK_ERROR;
										return ERR_PARSE_ERROR;
									}
									CharType v;
									if (c>='0' && c<='9') {
										v=c-'0';
									} else if (c>='a' && c<='f') {
										v=c-'a';
										v+=10;
									} else if (c>='A' && c<='F') {
										v=c-'A';
										v+=10;
									} else {
										ERR_PRINT("BUG");
										v=0;
									}

									res<<=4;
									res|=v;


								}



							} break;
							//case '\"': res='\"'; break;
							//case '\\': res='\\'; break;
							//case '/': res='/'; break;
							default: {
								res = next;
								//r_err_str="Invalid escape sequence";
								//return ERR_PARSE_ERROR;
							} break;
						}

						str+=res;

					} else {
						if (ch=='\n')
							line++;
						str+=ch;
					}
				}

				if (p_stream->is_utf8()) {
					str.parse_utf8( str.ascii(true).get_data() );
				}
				r_token.type=TK_STRING;
				r_token.value=str;
				return OK;

			} break;
			default: {

				if (cchar<=32) {
					break;
				}

				if (cchar=='-' || (cchar>='0' && cchar<='9')) {
					//a number


					String num;
#define READING_SIGN 0
#define READING_INT 1
#define READING_DEC 2
#define READING_EXP 3
#define READING_DONE 4
					int reading=READING_INT;

					if (cchar=='-') {
						num+='-';
						cchar=p_stream->get_char();

					}



					CharType c = cchar;
					bool exp_sign=false;
					bool exp_beg=false;
					bool is_float=false;

					while(true) {

						switch(reading) {
							case READING_INT: {

								if (c>='0' && c<='9') {
									//pass
								} else if (c=='.') {
									reading=READING_DEC;
									is_float=true;
								} else if (c=='e') {
									reading=READING_EXP;
								} else {
									reading=READING_DONE;
								}

							 } break;
							case READING_DEC: {

								if (c>='0' && c<='9') {

								} else if (c=='e') {
									reading=READING_EXP;

								} else {
									reading=READING_DONE;
								}

							 } break;
							case READING_EXP: {

								if (c>='0' && c<='9') {
									exp_beg=true;

								} else if ((c=='-' || c=='+') && !exp_sign && !exp_beg) {
									if (c=='-')
										is_float=true;
									exp_sign=true;

								} else {
									reading=READING_DONE;
								}
							 } break;
						}

						if (reading==READING_DONE)
							break;
						num+=String::chr(c);
						c = p_stream->get_char();


					}

					p_stream->saved=c;


					r_token.type=TK_NUMBER;

					if (is_float)
						r_token.value=num.to_double();
					else
						r_token.value=num.to_int();
					return OK;

				} else if ((cchar>='A' && cchar<='Z') || (cchar>='a' && cchar<='z') || cchar=='_') {

					String id;
					bool first=true;

					while((cchar>='A' && cchar<='Z') || (cchar>='a' && cchar<='z') || cchar=='_' || (!first && cchar>='0' && cchar<='9')) {

						id+=String::chr(cchar);
						cchar=p_stream->get_char();
						first=false;
					}

					p_stream->saved=cchar;

					r_token.type=TK_IDENTIFIER;
					r_token.value=id;
					return OK;
				} else {
					r_err_str="Unexpected character.";
					r_token.type=TK_ERROR;
					return ERR_PARSE_ERROR;
				}
			}
		}
	}

	r_token.type=TK_ERROR;
	return ERR_PARSE_ERROR;
}

Error VariantParser::_parse_enginecfg(Stream *p_stream, Vector<String>& strings, int &line, String &r_err_str) {

	Token token;
	get_token(p_stream,token,line,r_err_str);
	if (token.type!=TK_PARENTHESIS_OPEN) {
		r_err_str="Expected '(' in old-style engine.cfg construct";
		return ERR_PARSE_ERROR;
	}


	String accum;

	while(true) {

		CharType c=p_stream->get_char();

		if (p_stream->is_eof()) {
			r_err_str="Unexpected EOF while parsing old-style engine.cfg construct";
			return ERR_PARSE_ERROR;
		}

		if (c==',') {
			strings.push_back(accum.strip_edges());
			accum=String();
		} else if (c==')') {
			strings.push_back(accum.strip_edges());
			return OK;
		} else if (c=='\n') {
			line++;
		}

	}

	return OK;
}

template<class T>
Error VariantParser::_parse_construct(Stream *p_stream,Vector<T>& r_construct,int &line,String &r_err_str) {


	Token token;
	get_token(p_stream,token,line,r_err_str);
	if (token.type!=TK_PARENTHESIS_OPEN) {
		r_err_str="Expected '(' in constructor";
		return ERR_PARSE_ERROR;
	}


	bool first=true;
	while(true) {

		if (!first) {
			get_token(p_stream,token,line,r_err_str);
			if (token.type==TK_COMMA) {
				//do none
			} else if (token.type==TK_PARENTHESIS_CLOSE) {
				break;
			} else {
				r_err_str="Expected ',' or ')' in constructor";
				return ERR_PARSE_ERROR;

			}
		}
		get_token(p_stream,token,line,r_err_str);

		if (first && token.type==TK_PARENTHESIS_CLOSE) {
			break;
		} else if (token.type!=TK_NUMBER) {
			r_err_str="Expected float in constructor";
			return ERR_PARSE_ERROR;
		}


		r_construct.push_back(token.value);
		first=false;
	}

	return OK;

}

Error VariantParser::parse_value(Token& token,Variant &value,Stream *p_stream,int &line,String &r_err_str,ResourceParser *p_res_parser) {



/*	{
		Error err = get_token(p_stream,token,line,r_err_str);
		if (err)
			return err;
	}*/


	if (token.type==TK_CURLY_BRACKET_OPEN) {

		Dictionary d;
		Error err = _parse_dictionary(d,p_stream,line,r_err_str,p_res_parser);
		if (err)
			return err;
		value=d;
		return OK;
	} else if (token.type==TK_BRACKET_OPEN) {

		Array a;
		Error err = _parse_array(a,p_stream,line,r_err_str,p_res_parser);
		if (err)
			return err;
		value=a;
		return OK;

	} else if (token.type==TK_IDENTIFIER) {
/*
		VECTOR2,		// 5
		RECT2,
		VECTOR3,
		MATRIX32,
		PLANE,
		QUAT,			// 10
		_AABB, //sorry naming convention fail :( not like it's used often
		MATRIX3,
		TRANSFORM,

		// misc types
		COLOR,
		IMAGE,			// 15
		NODE_PATH,
		_RID,
		OBJECT,
		INPUT_EVENT,
		DICTIONARY,		// 20
		ARRAY,

		// arrays
		RAW_ARRAY,
		INT_ARRAY,
		REAL_ARRAY,
		STRING_ARRAY,	// 25
		VECTOR2_ARRAY,
		VECTOR3_ARRAY,
		COLOR_ARRAY,

		VARIANT_MAX

*/
		String id = token.value;
		if (id=="true")
			value=true;
		else if (id=="false")
			value=false;
		else if (id=="null" || id=="nil")
			value=Variant();
		else if (id=="Vector2"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=2) {
				r_err_str="Expected 2 arguments for constructor";
			}

			value=Vector2(args[0],args[1]);
			return OK;
		} else if (id=="Rect2"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=4) {
				r_err_str="Expected 4 arguments for constructor";
			}

			value=Rect2(args[0],args[1],args[2],args[3]);
			return OK;
		} else if (id=="Vector3"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=3) {
				r_err_str="Expected 3 arguments for constructor";
			}

			value=Vector3(args[0],args[1],args[2]);
			return OK;
		} else if (id=="Matrix32"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=6) {
				r_err_str="Expected 6 arguments for constructor";
			}
			Matrix32 m;
			m[0]=Vector2(args[0],args[1]);
			m[1]=Vector2(args[2],args[3]);
			m[2]=Vector2(args[4],args[5]);
			value=m;
			return OK;
		} else if (id=="Plane") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=4) {
				r_err_str="Expected 4 arguments for constructor";
			}

			value=Plane(args[0],args[1],args[2],args[3]);
			return OK;
		} else if (id=="Quat") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=4) {
				r_err_str="Expected 4 arguments for constructor";
			}

			value=Quat(args[0],args[1],args[2],args[3]);
			return OK;

		} else if (id=="AABB"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=6) {
				r_err_str="Expected 6 arguments for constructor";
			}

			value=AABB(Vector3(args[0],args[1],args[2]),Vector3(args[3],args[4],args[5]));
			return OK;

		} else if (id=="Matrix3"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=9) {
				r_err_str="Expected 9 arguments for constructor";
			}

			value=Matrix3(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]);
			return OK;
		} else if (id=="Transform"){

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=12) {
				r_err_str="Expected 12 arguments for constructor";
			}

			value=Transform(Matrix3(args[0],args[1],args[2],args[3],args[4],args[5],args[6],args[7],args[8]),Vector3(args[9],args[10],args[11]));
			return OK;

		} else if (id=="Color") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			if (args.size()!=4) {
				r_err_str="Expected 4 arguments for constructor";
			}

			value=Color(args[0],args[1],args[2],args[3]);
			return OK;

		} else if (id=="Image") {

			//:|

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}


			get_token(p_stream,token,line,r_err_str);
			if (token.type==TK_PARENTHESIS_CLOSE) {
				value=Image(); // just an Image()
				return OK;
			} else if (token.type!=TK_NUMBER) {
				r_err_str="Expected number (width)";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);

			int width=token.value;
			if (token.type!=TK_COMMA) {
				r_err_str="Expected ','";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_NUMBER) {
				r_err_str="Expected number (height)";
				return ERR_PARSE_ERROR;
			}

			int height=token.value;

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_COMMA) {
				r_err_str="Expected ','";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_NUMBER) {
				r_err_str="Expected number (mipmaps)";
				return ERR_PARSE_ERROR;
			}

			int mipmaps=token.value;

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_COMMA) {
				r_err_str="Expected ','";
				return ERR_PARSE_ERROR;
			}


			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_IDENTIFIER) {
				r_err_str="Expected identifier (format)";
				return ERR_PARSE_ERROR;
			}


			String sformat=token.value;

			Image::Format format;

			if (sformat=="GRAYSCALE") format=Image::FORMAT_GRAYSCALE;
			else if (sformat=="INTENSITY") format=Image::FORMAT_INTENSITY;
			else if (sformat=="GRAYSCALE_ALPHA") format=Image::FORMAT_GRAYSCALE_ALPHA;
			else if (sformat=="RGB") format=Image::FORMAT_RGB;
			else if (sformat=="RGBA") format=Image::FORMAT_RGBA;
			else if (sformat=="INDEXED") format=Image::FORMAT_INDEXED;
			else if (sformat=="INDEXED_ALPHA") format=Image::FORMAT_INDEXED_ALPHA;
			else if (sformat=="BC1") format=Image::FORMAT_BC1;
			else if (sformat=="BC2") format=Image::FORMAT_BC2;
			else if (sformat=="BC3") format=Image::FORMAT_BC3;
			else if (sformat=="BC4") format=Image::FORMAT_BC4;
			else if (sformat=="BC5") format=Image::FORMAT_BC5;
			else if (sformat=="PVRTC2") format=Image::FORMAT_PVRTC2;
			else if (sformat=="PVRTC2_ALPHA") format=Image::FORMAT_PVRTC2_ALPHA;
			else if (sformat=="PVRTC4") format=Image::FORMAT_PVRTC4;
			else if (sformat=="PVRTC4_ALPHA") format=Image::FORMAT_PVRTC4_ALPHA;
			else if (sformat=="ATC") format=Image::FORMAT_ATC;
			else if (sformat=="ATC_ALPHA_EXPLICIT") format=Image::FORMAT_ATC_ALPHA_EXPLICIT;
			else if (sformat=="ATC_ALPHA_INTERPOLATED") format=Image::FORMAT_ATC_ALPHA_INTERPOLATED;
			else if (sformat=="CUSTOM") format=Image::FORMAT_CUSTOM;
			else {
				r_err_str="Invalid image format: '"+sformat+"'";
				return ERR_PARSE_ERROR;
			};

			int len = Image::get_image_data_size(width,height,format,mipmaps);

			DVector<uint8_t> buffer;
			buffer.resize(len);

			if (buffer.size()!=len) {
				r_err_str="Couldn't allocate image buffer of size: "+itos(len);
			}

			{
				DVector<uint8_t>::Write w=buffer.write();

				for(int i=0;i<len;i++) {
					get_token(p_stream,token,line,r_err_str);
					if (token.type!=TK_COMMA) {
						r_err_str="Expected ','";
						return ERR_PARSE_ERROR;
					}

					get_token(p_stream,token,line,r_err_str);
					if (token.type!=TK_NUMBER) {
						r_err_str="Expected number";
						return ERR_PARSE_ERROR;
					}

					w[i]=int(token.value);

				}
			}


			Image img(width,height,mipmaps,format,buffer);

			value=img;

			return OK;


		} else if (id=="NodePath") {



			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_STRING) {
				r_err_str="Expected string as argument for NodePath()";
				return ERR_PARSE_ERROR;
			}

			value=NodePath(String(token.value));

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_CLOSE) {
				r_err_str="Expected ')'";
				return ERR_PARSE_ERROR;
			}

		} else if (id=="RID") {



			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_NUMBER) {
				r_err_str="Expected number as argument";
				return ERR_PARSE_ERROR;
			}

			value=token.value;

			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_CLOSE) {
				r_err_str="Expected ')'";
				return ERR_PARSE_ERROR;
			}


			return OK;

		} else if (id=="Resource" || id=="SubResource" || id=="ExtResource") {



			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}


			if (p_res_parser && id=="Resource" && p_res_parser->func){

				RES res;
				Error err = p_res_parser->func(p_res_parser->userdata,p_stream,res,line,r_err_str);
				if (err)
					return err;

				value=res;

				return OK;
			} else if (p_res_parser && id=="ExtResource" && p_res_parser->ext_func){

				RES res;
				Error err = p_res_parser->ext_func(p_res_parser->userdata,p_stream,res,line,r_err_str);
				if (err)
					return err;

				value=res;

				return OK;
			} else if (p_res_parser && id=="SubResource" && p_res_parser->sub_func){

				RES res;
				Error err = p_res_parser->sub_func(p_res_parser->userdata,p_stream,res,line,r_err_str);
				if (err)
					return err;

				value=res;

				return OK;
			} else {

				get_token(p_stream,token,line,r_err_str);
				if (token.type==TK_STRING) {
					String path=token.value;
					RES res = ResourceLoader::load(path);
					if (res.is_null()) {
						r_err_str="Can't load resource at path: '"+path+"'.";
						return ERR_PARSE_ERROR;
					}

					get_token(p_stream,token,line,r_err_str);
					if (token.type!=TK_PARENTHESIS_CLOSE) {
						r_err_str="Expected ')'";
						return ERR_PARSE_ERROR;
					}

					value=res;
					return OK;

				} else {
					r_err_str="Expected string as argument for Resource().";
					return ERR_PARSE_ERROR;
				}
			}

			return OK;


		} else if (id=="InputEvent") {



			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}

			get_token(p_stream,token,line,r_err_str);

			if (token.type!=TK_IDENTIFIER) {
				r_err_str="Expected identifier";
				return ERR_PARSE_ERROR;
			}


			String id = token.value;

			InputEvent ie;

			if (id=="KEY") {

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_COMMA) {
					r_err_str="Expected ','";
					return ERR_PARSE_ERROR;
				}

				ie.type=InputEvent::KEY;


				get_token(p_stream,token,line,r_err_str);
				if (token.type==TK_IDENTIFIER) {
					String name=token.value;
					ie.key.scancode=find_keycode(name);
				} else if (token.type==TK_NUMBER) {

					ie.key.scancode=token.value;
				} else {

					r_err_str="Expected string or integer for keycode";
					return ERR_PARSE_ERROR;
				}

				get_token(p_stream,token,line,r_err_str);

				if (token.type==TK_COMMA) {

					get_token(p_stream,token,line,r_err_str);

					if (token.type!=TK_IDENTIFIER) {
						r_err_str="Expected identifier with modifier flas";
						return ERR_PARSE_ERROR;
					}

					String mods=token.value;

					if (mods.findn("C")!=-1)
						ie.key.mod.control=true;
					if (mods.findn("A")!=-1)
						ie.key.mod.alt=true;
					if (mods.findn("S")!=-1)
						ie.key.mod.shift=true;
					if (mods.findn("M")!=-1)
						ie.key.mod.meta=true;

					get_token(p_stream,token,line,r_err_str);
					if (token.type!=TK_PARENTHESIS_CLOSE) {
						r_err_str="Expected ')'";
						return ERR_PARSE_ERROR;
					}

				} else if (token.type!=TK_PARENTHESIS_CLOSE) {

					r_err_str="Expected ')' or modifier flags.";
					return ERR_PARSE_ERROR;
				}


			} else if (id=="MBUTTON") {

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_COMMA) {
					r_err_str="Expected ','";
					return ERR_PARSE_ERROR;
				}

				ie.type=InputEvent::MOUSE_BUTTON;

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_NUMBER) {
					r_err_str="Expected button index";
					return ERR_PARSE_ERROR;
				}

				ie.mouse_button.button_index = token.value;

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_PARENTHESIS_CLOSE) {
					r_err_str="Expected ')'";
					return ERR_PARSE_ERROR;
				}

			} else if (id=="JBUTTON") {

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_COMMA) {
					r_err_str="Expected ','";
					return ERR_PARSE_ERROR;
				}

				ie.type=InputEvent::JOYSTICK_BUTTON;

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_NUMBER) {
					r_err_str="Expected button index";
					return ERR_PARSE_ERROR;
				}

				ie.joy_button.button_index = token.value;

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_PARENTHESIS_CLOSE) {
					r_err_str="Expected ')'";
					return ERR_PARSE_ERROR;
				}

			} else if (id=="JAXIS") {

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_COMMA) {
					r_err_str="Expected ','";
					return ERR_PARSE_ERROR;
				}

				ie.type=InputEvent::JOYSTICK_MOTION;

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_NUMBER) {
					r_err_str="Expected axis index";
					return ERR_PARSE_ERROR;
				}

				ie.joy_motion.axis = token.value;

				get_token(p_stream,token,line,r_err_str);

				if (token.type!=TK_COMMA) {
					r_err_str="Expected ',' after axis index";
					return ERR_PARSE_ERROR;
				}

				get_token(p_stream,token,line,r_err_str);
				if (token.type!=TK_NUMBER) {
					r_err_str="Expected axis sign";
					return ERR_PARSE_ERROR;
				}

				ie.joy_motion.axis_value = token.value;

				get_token(p_stream,token,line,r_err_str);

				if (token.type!=TK_PARENTHESIS_CLOSE) {
					r_err_str="Expected ')' for jaxis";
					return ERR_PARSE_ERROR;
				}

			} else {

				r_err_str="Invalid input event type.";
				return ERR_PARSE_ERROR;
			}

			value=ie;

			return OK;

		} else if (id=="ByteArray") {

			Vector<uint8_t> args;
			Error err = _parse_construct<uint8_t>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<uint8_t> arr;
			{
				int len=args.size();
				arr.resize(len);
				DVector<uint8_t>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=args[i];
				}
			}

			value=arr;

			return OK;

		} else if (id=="IntArray") {

			Vector<int32_t> args;
			Error err = _parse_construct<int32_t>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<int32_t> arr;
			{
				int len=args.size();
				arr.resize(len);
				DVector<int32_t>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=int(args[i]);
				}
			}

			value=arr;

			return OK;

		} else if (id=="FloatArray") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<float> arr;
			{
				int len=args.size();
				arr.resize(len);
				DVector<float>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=args[i];
				}
			}

			value=arr;

			return OK;
		} else if (id=="StringArray") {


			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '('";
				return ERR_PARSE_ERROR;
			}

			Vector<String> cs;

			bool first=true;
			while(true) {

				if (!first) {
					get_token(p_stream,token,line,r_err_str);
					if (token.type==TK_COMMA) {
						//do none
					} else if (token.type==TK_PARENTHESIS_CLOSE) {
						break;
					} else {
						r_err_str="Expected ',' or ')'";
						return ERR_PARSE_ERROR;

					}
				}
				get_token(p_stream,token,line,r_err_str);

				if (token.type!=TK_STRING) {
					r_err_str="Expected string";
					return ERR_PARSE_ERROR;
				}

				first=false;
				cs.push_back(token.value);
			}


			DVector<String> arr;
			{
				int len=cs.size();
				arr.resize(len);
				DVector<String>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=cs[i];
				}
			}

			value=arr;

			return OK;


		} else if (id=="Vector2Array") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<Vector2> arr;
			{
				int len=args.size()/2;
				arr.resize(len);
				DVector<Vector2>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=Vector2(args[i*2+0],args[i*2+1]);
				}
			}

			value=arr;

			return OK;

		} else if (id=="Vector3Array") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<Vector3> arr;
			{
				int len=args.size()/3;
				arr.resize(len);
				DVector<Vector3>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=Vector3(args[i*3+0],args[i*3+1],args[i*3+2]);
				}
			}

			value=arr;

			return OK;

		} else if (id=="ColorArray") {

			Vector<float> args;
			Error err = _parse_construct<float>(p_stream,args,line,r_err_str);
			if (err)
				return err;

			DVector<Color> arr;
			{
				int len=args.size()/4;
				arr.resize(len);
				DVector<Color>::Write w = arr.write();
				for(int i=0;i<len;i++) {
					w[i]=Color(args[i*4+0],args[i*4+1],args[i*4+2],args[i*4+3]);
				}
			}

			value=arr;

			return OK;
		} else if (id=="key") { // compatibility with engine.cfg

			Vector<String> params;
			Error err = _parse_enginecfg(p_stream,params,line,r_err_str);
			if (err)
				return err;
			ERR_FAIL_COND_V(params.size()!=1 && params.size()!=2,ERR_PARSE_ERROR);

			int scode=0;

			if (params[0].is_numeric()) {
				scode=params[0].to_int();
				if (scode < 10) {
					scode=KEY_0+scode;
				}
			} else
				scode=find_keycode(params[0]);

			InputEvent ie;
			ie.type=InputEvent::KEY;
			ie.key.scancode=scode;

			if (params.size()==2) {
				String mods=params[1];
				if (mods.findn("C")!=-1)
					ie.key.mod.control=true;
				if (mods.findn("A")!=-1)
					ie.key.mod.alt=true;
				if (mods.findn("S")!=-1)
					ie.key.mod.shift=true;
				if (mods.findn("M")!=-1)
					ie.key.mod.meta=true;
			}
			value=ie;
			return OK;

		} else if (id=="mbutton") {  // compatibility with engine.cfg

			Vector<String> params;
			Error err = _parse_enginecfg(p_stream,params,line,r_err_str);
			if (err)
				return err;
			ERR_FAIL_COND_V(params.size()!=2,ERR_PARSE_ERROR);

			InputEvent ie;
			ie.type=InputEvent::MOUSE_BUTTON;
			ie.device=params[0].to_int();
			ie.mouse_button.button_index=params[1].to_int();

			value=ie;
			return OK;
		} else if (id=="jbutton") {  // compatibility with engine.cfg

			Vector<String> params;
			Error err = _parse_enginecfg(p_stream,params,line,r_err_str);
			if (err)
				return err;
			ERR_FAIL_COND_V(params.size()!=2,ERR_PARSE_ERROR);
			InputEvent ie;
			ie.type=InputEvent::JOYSTICK_BUTTON;
			ie.device=params[0].to_int();
			ie.joy_button.button_index=params[1].to_int();

			value=ie;

			return OK;
		} else if (id=="jaxis") {  // compatibility with engine.cfg

			Vector<String> params;
			Error err = _parse_enginecfg(p_stream,params,line,r_err_str);
			if (err)
				return err;
			ERR_FAIL_COND_V(params.size()!=2,ERR_PARSE_ERROR);

			InputEvent ie;
			ie.type=InputEvent::JOYSTICK_MOTION;
			ie.device=params[0].to_int();
			int axis=params[1].to_int();
			ie.joy_motion.axis=axis>>1;
			ie.joy_motion.axis_value=axis&1?1:-1;

			value= ie;

			return OK;
		} else if (id=="img") {  // compatibility with engine.cfg

			Token token;
			get_token(p_stream,token,line,r_err_str);
			if (token.type!=TK_PARENTHESIS_OPEN) {
				r_err_str="Expected '(' in old-style engine.cfg construct";
				return ERR_PARSE_ERROR;
			}

			while(true) {
				CharType c = p_stream->get_char();
				if (p_stream->is_eof()) {
					r_err_str="Unexpected EOF in old style engine.cfg img()";
					return ERR_PARSE_ERROR;
				}
				if (c==')')
					break;
			}

			value=Image();

			return OK;

		} else {
			r_err_str="Unexpected identifier: '"+id+"'.";
			return ERR_PARSE_ERROR;
		}


		/*
				VECTOR2,		// 5
				RECT2,
				VECTOR3,
				MATRIX32,
				PLANE,
				QUAT,			// 10
				_AABB, //sorry naming convention fail :( not like it's used often
				MATRIX3,
				TRANSFORM,

				// misc types
				COLOR,
				IMAGE,			// 15
				NODE_PATH,
				_RID,
				OBJECT,
				INPUT_EVENT,
				DICTIONARY,		// 20
				ARRAY,

				// arrays
				RAW_ARRAY,
				INT_ARRAY,
				REAL_ARRAY,
				STRING_ARRAY,	// 25
				VECTOR2_ARRAY,
				VECTOR3_ARRAY,
				COLOR_ARRAY,

				VARIANT_MAX

		*/

		return OK;

	} else if (token.type==TK_NUMBER) {

		value=token.value;
		return OK;
	} else if (token.type==TK_STRING) {

		value=token.value;
		return OK;
	} else if (token.type==TK_COLOR) {

		value=token.value;
		return OK;
	} else {
		r_err_str="Expected value, got "+String(tk_name[token.type])+".";
		return ERR_PARSE_ERROR;
	}

	return ERR_PARSE_ERROR;
}


Error VariantParser::_parse_array(Array &array, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser) {

	Token token;
	bool need_comma=false;


	while(true) {

		if (p_stream->is_eof()) {
			r_err_str="Unexpected End of File while parsing array";
			return ERR_FILE_CORRUPT;
		}

		Error err = get_token(p_stream,token,line,r_err_str);
		if (err!=OK)
			return err;

		if (token.type==TK_BRACKET_CLOSE) {

			return OK;
		}

		if (need_comma) {

			if (token.type!=TK_COMMA) {

				r_err_str="Expected ','";
				return ERR_PARSE_ERROR;
			} else {
				need_comma=false;
				continue;
			}
		}

		Variant v;
		err = parse_value(token,v,p_stream,line,r_err_str,p_res_parser);
		if (err)
			return err;

		array.push_back(v);
		need_comma=true;

	}

	return OK;

}

Error VariantParser::_parse_dictionary(Dictionary &object, Stream *p_stream, int &line, String &r_err_str, ResourceParser *p_res_parser) {

	bool at_key=true;
	Variant key;
	Token token;
	bool need_comma=false;


	while(true) {


		if (p_stream->is_eof()) {
			r_err_str="Unexpected End of File while parsing dictionary";
			return ERR_FILE_CORRUPT;
		}

		if (at_key) {

			Error err = get_token(p_stream,token,line,r_err_str);
			if (err!=OK)
				return err;

			if (token.type==TK_CURLY_BRACKET_CLOSE) {

				return OK;
			}

			if (need_comma) {

				if (token.type!=TK_COMMA) {

					r_err_str="Expected '}' or ','";
					return ERR_PARSE_ERROR;
				} else {
					need_comma=false;
					continue;
				}
			}




			err = parse_value(token,key,p_stream,line,r_err_str,p_res_parser);

			if (err)
				return err;

			err = get_token(p_stream,token,line,r_err_str);

			if (err!=OK)
				return err;
			if (token.type!=TK_COLON) {

				r_err_str="Expected ':'";
				return ERR_PARSE_ERROR;
			}
			at_key=false;
		} else {


			Error err = get_token(p_stream,token,line,r_err_str);
			if (err!=OK)
				return err;

			Variant v;
			err = parse_value(token,v,p_stream,line,r_err_str,p_res_parser);
			if (err)
				return err;
			object[key]=v;
			need_comma=true;
			at_key=true;
		}
	}

	return OK;
}


Error VariantParser::_parse_tag(Token& token, Stream *p_stream, int &line, String &r_err_str, Tag& r_tag, ResourceParser *p_res_parser,bool p_simple_tag) {

	r_tag.fields.clear();

	if (token.type!=TK_BRACKET_OPEN) {
		r_err_str="Expected '['";
		return ERR_PARSE_ERROR;
	}


	if (p_simple_tag) {

		r_tag.name="";
		r_tag.fields.clear();

		while(true) {

			CharType c = p_stream->get_char();
			if (p_stream->is_eof()) {
				r_err_str="Unexpected EOF while parsing simple tag";
				return ERR_PARSE_ERROR;
			}
			if (c==']')
				break;
			r_tag.name+=String::chr(c);
		}

		r_tag.name = r_tag.name.strip_edges();

		return OK;

	}

	get_token(p_stream,token,line,r_err_str);


	if (token.type!=TK_IDENTIFIER) {
		r_err_str="Expected identifier (tag name)";
		return ERR_PARSE_ERROR;
	}

	r_tag.name=token.value;
	bool parsing_tag=true;

	while(true) {

		if (p_stream->is_eof()) {
			r_err_str="Unexpected End of File while parsing tag: "+r_tag.name;
			return ERR_FILE_CORRUPT;
		}

		get_token(p_stream,token,line,r_err_str);
		if (token.type==TK_BRACKET_CLOSE)
			break;

		if (parsing_tag && token.type==TK_PERIOD) {
			r_tag.name+="."; //support tags such as [someprop.Anroid] for specific platforms
			get_token(p_stream,token,line,r_err_str);
		} else if (parsing_tag && token.type==TK_COLON) {
			r_tag.name+=":"; //support tags such as [someprop.Anroid] for specific platforms
			get_token(p_stream,token,line,r_err_str);
		} else {
			parsing_tag=false;
		}

		if (token.type!=TK_IDENTIFIER) {
			r_err_str="Expected Identifier";
			return ERR_PARSE_ERROR;
		}

		String id=token.value;

		if (parsing_tag) {
			r_tag.name+=id;
			continue;
		}

		get_token(p_stream,token,line,r_err_str);
		if (token.type!=TK_EQUAL) {
			return ERR_PARSE_ERROR;
		}

		get_token(p_stream,token,line,r_err_str);
		Variant value;
		Error err = parse_value(token,value,p_stream,line,r_err_str,p_res_parser);
		if (err)
			return err;

		r_tag.fields[id]=value;

	}


	return OK;

}

Error VariantParser::parse_tag(Stream *p_stream, int &line, String &r_err_str, Tag& r_tag, ResourceParser *p_res_parser, bool p_simple_tag) {

	Token token;
	get_token(p_stream,token,line,r_err_str);

	if (token.type==TK_EOF) {
		return ERR_FILE_EOF;
	}

	if (token.type!=TK_BRACKET_OPEN) {
		r_err_str="Expected '['";
		return ERR_PARSE_ERROR;
	}

	return _parse_tag(token,p_stream,line,r_err_str,r_tag,p_res_parser,p_simple_tag);

}

Error VariantParser::parse_tag_assign_eof(Stream *p_stream, int &line, String &r_err_str, Tag& r_tag, String &r_assign, Variant &r_value, ResourceParser *p_res_parser, bool p_simple_tag) {


	//assign..
	r_assign="";
	String what;

	while(true) {


		CharType c;
		if (p_stream->saved) {
			c=p_stream->saved;
			p_stream->saved=0;

		} else {
			c=p_stream->get_char();
		}

		if (p_stream->is_eof())
			return ERR_FILE_EOF;

		if (c==';') { //comment
			while(true) {
				CharType ch=p_stream->get_char();
				if (p_stream->is_eof()) {
					return ERR_FILE_EOF;
				}
				if (ch=='\n')
					break;
			}
			continue;
		}

		if (c=='[' && what.length()==0) {
			//it's a tag!
			p_stream->saved='['; //go back one

			Error err = parse_tag(p_stream,line,r_err_str,r_tag,p_res_parser,p_simple_tag);

			return err;
		}

		if (c>32) {
			if (c!='=') {
				what+=String::chr(c);
			} else {
				r_assign=what;
				Token token;
				get_token(p_stream,token,line,r_err_str);
				Error err = parse_value(token,r_value,p_stream,line,r_err_str,p_res_parser);
				if (err) {

				}
				return err;
			}
		} else if (c=='\n') {
			line++;
		}
	}

	return OK;
}

Error VariantParser::parse(Stream *p_stream, Variant& r_ret, String &r_err_str, int &r_err_line, ResourceParser *p_res_parser) {


	Token token;
	Error err = get_token(p_stream,token,r_err_line,r_err_str);
	if (err)
		return err;

	if (token.type==TK_EOF) {
		return ERR_FILE_EOF;
	}

	return parse_value(token,r_ret,p_stream,r_err_line,r_err_str,p_res_parser);

}



//////////////////////////////////////////////////////////////////////////////////
//////////////////////////////////////////////////////////////////////////////////
////////////////////////////////////////////////////////////////////////////////

static String rtosfix(double p_value) {


	if (p_value==0.0)
		return "0"; //avoid negative zero (-0) being written, which may annoy git, svn, etc. for changes when they don't exist.
	else
		return rtoss(p_value);
}

Error VariantWriter::write(const Variant& p_variant, StoreStringFunc p_store_string_func, void *p_store_string_ud,EncodeResourceFunc p_encode_res_func,void* p_encode_res_ud) {

	switch( p_variant.get_type() ) {

		case Variant::NIL: {
			p_store_string_func(p_store_string_ud,"null");
		} break;
		case Variant::BOOL: {

			p_store_string_func(p_store_string_ud,p_variant.operator bool() ? "true":"false" );
		} break;
		case Variant::INT: {

			p_store_string_func(p_store_string_ud, itos(p_variant.operator int()) );
		} break;
		case Variant::REAL: {

			String s = rtosfix(p_variant.operator real_t());
			if (s.find(".")==-1 && s.find("e")==-1)
				s+=".0";
			p_store_string_func(p_store_string_ud, s );
		} break;
		case Variant::STRING: {

			String str=p_variant;

			str="\""+str.c_escape()+"\"";
			p_store_string_func(p_store_string_ud, str );
		} break;
		case Variant::VECTOR2: {

			Vector2 v = p_variant;
			p_store_string_func(p_store_string_ud,"Vector2( "+rtosfix(v.x) +", "+rtosfix(v.y)+" )" );
		} break;
		case Variant::RECT2: {

			Rect2 aabb = p_variant;
			p_store_string_func(p_store_string_ud,"Rect2( "+rtosfix(aabb.pos.x) +", "+rtosfix(aabb.pos.y) +", "+rtosfix(aabb.size.x) +", "+rtosfix(aabb.size.y)+" )" );

		} break;
		case Variant::VECTOR3: {

			Vector3 v = p_variant;
			p_store_string_func(p_store_string_ud,"Vector3( "+rtosfix(v.x) +", "+rtosfix(v.y)+", "+rtosfix(v.z)+" )");
		} break;
		case Variant::PLANE: {

			Plane p = p_variant;
			p_store_string_func(p_store_string_ud,"Plane( "+rtosfix(p.normal.x) +", "+rtosfix(p.normal.y)+", "+rtosfix(p.normal.z)+", "+rtosfix(p.d)+" )" );

		} break;
		case Variant::_AABB: {

			AABB aabb = p_variant;
			p_store_string_func(p_store_string_ud,"AABB( "+rtosfix(aabb.pos.x) +", "+rtosfix(aabb.pos.y) +", "+rtosfix(aabb.pos.z) +", "+rtosfix(aabb.size.x) +", "+rtosfix(aabb.size.y) +", "+rtosfix(aabb.size.z)+" )"  );

		} break;
		case Variant::QUAT: {

			Quat quat = p_variant;
			p_store_string_func(p_store_string_ud,"Quat( "+rtosfix(quat.x)+", "+rtosfix(quat.y)+", "+rtosfix(quat.z)+", "+rtosfix(quat.w)+" )");

		} break;
		case Variant::MATRIX32: {

			String s="Matrix32( ";
			Matrix32 m3 = p_variant;
			for (int i=0;i<3;i++) {
				for (int j=0;j<2;j++) {

					if (i!=0 || j!=0)
						s+=", ";
					s+=rtosfix( m3.elements[i][j] );
				}
			}

			p_store_string_func(p_store_string_ud,s+" )");

		} break;
		case Variant::MATRIX3: {

			String s="Matrix3( ";
			Matrix3 m3 = p_variant;
			for (int i=0;i<3;i++) {
				for (int j=0;j<3;j++) {

					if (i!=0 || j!=0)
						s+=", ";
					s+=rtosfix( m3.elements[i][j] );
				}
			}

			p_store_string_func(p_store_string_ud,s+" )");

		} break;
		case Variant::TRANSFORM: {

			String s="Transform( ";
			Transform t = p_variant;
			Matrix3 &m3 = t.basis;
			for (int i=0;i<3;i++) {
				for (int j=0;j<3;j++) {

					if (i!=0 || j!=0)
						s+=", ";
					s+=rtosfix( m3.elements[i][j] );
				}
			}

			s=s+", "+rtosfix(t.origin.x) +", "+rtosfix(t.origin.y)+", "+rtosfix(t.origin.z);

			p_store_string_func(p_store_string_ud,s+" )");
		} break;

			// misc types
		case Variant::COLOR: {

			Color c = p_variant;
			p_store_string_func(p_store_string_ud,"Color( "+rtosfix(c.r) +", "+rtosfix(c.g)+", "+rtosfix(c.b)+", "+rtosfix(c.a)+" )");

		} break;
		case Variant::IMAGE: {


			Image img=p_variant;

			if (img.empty()) {
				p_store_string_func(p_store_string_ud,"Image()");
				break;
			}

			String imgstr="Image( ";
			imgstr+=itos(img.get_width());
			imgstr+=", "+itos(img.get_height());
			imgstr+=", "+itos(img.get_mipmaps());
			imgstr+=", ";

			switch(img.get_format()) {

				case Image::FORMAT_GRAYSCALE: imgstr+="GRAYSCALE"; break;
				case Image::FORMAT_INTENSITY: imgstr+="INTENSITY"; break;
				case Image::FORMAT_GRAYSCALE_ALPHA: imgstr+="GRAYSCALE_ALPHA"; break;
				case Image::FORMAT_RGB: imgstr+="RGB"; break;
				case Image::FORMAT_RGBA: imgstr+="RGBA"; break;
				case Image::FORMAT_INDEXED : imgstr+="INDEXED"; break;
				case Image::FORMAT_INDEXED_ALPHA: imgstr+="INDEXED_ALPHA"; break;
				case Image::FORMAT_BC1: imgstr+="BC1"; break;
				case Image::FORMAT_BC2: imgstr+="BC2"; break;
				case Image::FORMAT_BC3: imgstr+="BC3"; break;
				case Image::FORMAT_BC4: imgstr+="BC4"; break;
				case Image::FORMAT_BC5: imgstr+="BC5"; break;
				case Image::FORMAT_PVRTC2: imgstr+="PVRTC2"; break;
				case Image::FORMAT_PVRTC2_ALPHA: imgstr+="PVRTC2_ALPHA"; break;
				case Image::FORMAT_PVRTC4: imgstr+="PVRTC4"; break;
				case Image::FORMAT_PVRTC4_ALPHA: imgstr+="PVRTC4_ALPHA"; break;
				case Image::FORMAT_ETC: imgstr+="ETC"; break;
				case Image::FORMAT_ATC: imgstr+="ATC"; break;
				case Image::FORMAT_ATC_ALPHA_EXPLICIT: imgstr+="ATC_ALPHA_EXPLICIT"; break;
				case Image::FORMAT_ATC_ALPHA_INTERPOLATED: imgstr+="ATC_ALPHA_INTERPOLATED"; break;
				case Image::FORMAT_CUSTOM: imgstr+="CUSTOM"; break;
				default: {}
			}


			String s;

			DVector<uint8_t> data = img.get_data();
			int len = data.size();
			DVector<uint8_t>::Read r = data.read();
			const uint8_t *ptr=r.ptr();;
			for (int i=0;i<len;i++) {

				if (i>0)
					s+=", ";
				s+=itos(ptr[i]);
			}

			imgstr+=", ";
			p_store_string_func(p_store_string_ud,imgstr);
			p_store_string_func(p_store_string_ud,s);
			p_store_string_func(p_store_string_ud," )");
		} break;
		case Variant::NODE_PATH: {

			String str=p_variant;

			str="NodePath(\""+str.c_escape()+"\")";
			p_store_string_func(p_store_string_ud,str);

		} break;

		case Variant::OBJECT: {

			RES res = p_variant;
			if (res.is_null()) {
				p_store_string_func(p_store_string_ud,"null");
				break; // don't save it
			}

			String res_text;

			if (p_encode_res_func) {

				res_text=p_encode_res_func(p_encode_res_ud,res);
			}

			if (res_text==String() && res->get_path().is_resource_file()) {

				//external resource
				String path=res->get_path();
				res_text="Resource( \""+path+"\")";
			}

			if (res_text==String())
				res_text="null";

			p_store_string_func(p_store_string_ud,res_text);

		} break;
		case Variant::INPUT_EVENT: {

			String str="InputEvent(";

			InputEvent ev=p_variant;
			switch(ev.type) {
				case InputEvent::KEY: {

					str+="KEY,"+itos(ev.key.scancode);
					String mod;
					if (ev.key.mod.alt)
						mod+="A";
					if (ev.key.mod.shift)
						mod+="S";
					if (ev.key.mod.control)
						mod+="C";
					if (ev.key.mod.meta)
						mod+="M";

					if (mod!=String())
						str+=","+mod;
				} break;
				case InputEvent::MOUSE_BUTTON: {

					str+="MBUTTON,"+itos(ev.mouse_button.button_index);
				} break;
				case InputEvent::JOYSTICK_BUTTON: {
					str+="JBUTTON,"+itos(ev.joy_button.button_index);

				} break;
				case InputEvent::JOYSTICK_MOTION: {
					str+="JAXIS,"+itos(ev.joy_motion.axis)+","+itos(ev.joy_motion.axis_value);
				} break;
				default: {}
			}

			str+=")";

			p_store_string_func(p_store_string_ud,str); //will be added later

		} break;
		case Variant::DICTIONARY: {

			Dictionary dict = p_variant;

			List<Variant> keys;
			dict.get_key_list(&keys);
			keys.sort();

			p_store_string_func(p_store_string_ud,"{ ");
			for(List<Variant>::Element *E=keys.front();E;E=E->next()) {

				//if (!_check_type(dict[E->get()]))
				//	continue;
				write(E->get(),p_store_string_func,p_store_string_ud,p_encode_res_func,p_encode_res_ud);
				p_store_string_func(p_store_string_ud,":");
				write(dict[E->get()],p_store_string_func,p_store_string_ud,p_encode_res_func,p_encode_res_ud);
				if (E->next())
					p_store_string_func(p_store_string_ud,", ");
			}


			p_store_string_func(p_store_string_ud," }");


		} break;
		case Variant::ARRAY: {

			p_store_string_func(p_store_string_ud,"[ ");
			Array array = p_variant;
			int len=array.size();
			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");
				write(array[i],p_store_string_func,p_store_string_ud,p_encode_res_func,p_encode_res_ud);

			}
			p_store_string_func(p_store_string_ud," ]");

		} break;

		case Variant::RAW_ARRAY: {

			p_store_string_func(p_store_string_ud,"ByteArray( ");
			String s;
			DVector<uint8_t> data = p_variant;
			int len = data.size();
			DVector<uint8_t>::Read r = data.read();
			const uint8_t *ptr=r.ptr();;
			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");

				p_store_string_func(p_store_string_ud,itos(ptr[i]));

			}

			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::INT_ARRAY: {

			p_store_string_func(p_store_string_ud,"IntArray( ");
			DVector<int> data = p_variant;
			int len = data.size();
			DVector<int>::Read r = data.read();
			const int *ptr=r.ptr();;

			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");

				p_store_string_func(p_store_string_ud,itos(ptr[i]));
			}


			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::REAL_ARRAY: {

			p_store_string_func(p_store_string_ud,"FloatArray( ");
			DVector<real_t> data = p_variant;
			int len = data.size();
			DVector<real_t>::Read r = data.read();
			const real_t *ptr=r.ptr();;

			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");
				p_store_string_func(p_store_string_ud,rtosfix(ptr[i]));
			}

			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::STRING_ARRAY: {

			p_store_string_func(p_store_string_ud,"StringArray( ");
			DVector<String> data = p_variant;
			int len = data.size();
			DVector<String>::Read r = data.read();
			const String *ptr=r.ptr();;
			String s;
			//write_string("\n");



			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");
				String str=ptr[i];
				p_store_string_func(p_store_string_ud,"\""+str.c_escape()+"\"");
			}

			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::VECTOR2_ARRAY: {

			p_store_string_func(p_store_string_ud,"Vector2Array( ");
			DVector<Vector2> data = p_variant;
			int len = data.size();
			DVector<Vector2>::Read r = data.read();
			const Vector2 *ptr=r.ptr();;

			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");
				p_store_string_func(p_store_string_ud,rtosfix(ptr[i].x)+", "+rtosfix(ptr[i].y) );
			}

			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::VECTOR3_ARRAY: {

			p_store_string_func(p_store_string_ud,"Vector3Array( ");
			DVector<Vector3> data = p_variant;
			int len = data.size();
			DVector<Vector3>::Read r = data.read();
			const Vector3 *ptr=r.ptr();;

			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");
				p_store_string_func(p_store_string_ud,rtosfix(ptr[i].x)+", "+rtosfix(ptr[i].y)+", "+rtosfix(ptr[i].z) );
			}

			p_store_string_func(p_store_string_ud," )");

		} break;
		case Variant::COLOR_ARRAY: {

			p_store_string_func(p_store_string_ud,"ColorArray( ");

			DVector<Color> data = p_variant;
			int len = data.size();
			DVector<Color>::Read r = data.read();
			const Color *ptr=r.ptr();;

			for (int i=0;i<len;i++) {

				if (i>0)
					p_store_string_func(p_store_string_ud,", ");

				p_store_string_func(p_store_string_ud,rtosfix(ptr[i].r)+", "+rtosfix(ptr[i].g)+", "+rtosfix(ptr[i].b)+", "+rtosfix(ptr[i].a) );

			}
			p_store_string_func(p_store_string_ud," )");

		} break;
		default: {}

	}

	return OK;
}

static Error _write_to_str(void *ud,const String& p_string) {

	String *str=(String*)ud;
	(*str)+=p_string;
	return OK;
}

Error VariantWriter::write_to_string(const Variant& p_variant, String& r_string, EncodeResourceFunc p_encode_res_func, void *p_encode_res_ud) {

	r_string=String();

	return write(p_variant,_write_to_str,&r_string,p_encode_res_func,p_encode_res_ud);

}