xloader.h

/* ScummVM - Graphic Adventure Engine
 *
 * ScummVM is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */

#ifndef WINTERMUTE_X_FILE_LEXER_H
#define WINTERMUTE_X_FILE_LEXER_H

#include "common/memstream.h"
#include "common/scummsys.h"
#include "common/str.h"

namespace Wintermute {

enum TokenType {
    IDENTIFIER = 0,
    STRING,
    UUID,
    INT,
    FLOAT,
    OPEN_BRACES,
    CLOSE_BRACES,
    OPEN_PAREN,
    CLOSE_PAREN,
    OPEN_ANGLE,
    CLOSE_ANGLE,
    OPEN_BRACKET,
    CLOSE_BRACKET,
    SEMICOLON,
    COMMA,
    DOT,
    NULL_CHAR,
    UNKNOWN_TOKEN
};

struct Token {
    TokenType _type;
    Common::String _textVal;
    int _integerVal;
    float _floatVal;

    void pushChar(char c);
};

class XFileLexer {
public:
    XFileLexer(byte *buffer, uint32 fileSize, bool isText);

    void advanceToNextToken();
    void skipTerminator();
    bool eof();
    bool tokenIsIdentifier();
    bool tokenIsIdentifier(const char *val);
    void advanceOnOpenBraces();
    bool reachedClosedBraces();
    TokenType getTypeOfToken();
    bool tokenIsOfType(TokenType type);
    int tokenToInt();
    double tokenToFloat();
    Common::String tokenToString();
    uint32 tokenToUint32();

    void skipObject();

    float readFloat();
    int readInt();
    Common::String readString();
    uint32 readUint32();

private:
    void nextTokenBinary();

    Token _tok;
    Common::MemoryReadStream _buffer;
    int _lineCount;
    bool _isText;
    int _integersToRead;
    int _floatsToRead;
    bool _expectsTerminator;
};

} // namespace Wintermute

#endif