textsplit.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 GRIM_TEXTSPLIT_HH
#define GRIM_TEXTSPLIT_HH

namespace Common {
class SeekableReadStream;
}

namespace Grim {

// A utility class to help in parsing the text-format files.  Splits
// the text data into lines, skipping comments, trailing whitespace,
// and empty lines.  Also folds everything to lowercase.

class TextSplitter {
public:
    TextSplitter(const Common::String &fname, Common::SeekableReadStream *data);
    ~TextSplitter();

    char *nextLine() {
        processLine();
        return _currLine;
    }

    char *getCurrentLine() { return _currLine; }
    const char *getCurrentLine() const { return _currLine; }
    bool isEof() const { return _lineIndex == _numLines; }
    int getLineNumber() { return _lineIndex; }
    void setLineNumber(int line) { _lineIndex = line - 1; processLine(); }

    // Check if the current line contains 'needle'
    bool checkString(const char *needle);

    // Expect a certain fixed string; bail out with an error if not
    // found.  Advance to the next line.
    void expectString(const char *expected);

    // Scan a line according to the given format (compatible with
    // scanf); if not all fields are read (according to the field_count
    // argument), bail out with an error.  Advance to the next line.
    void scanString(const char *fmt, int field_count, ...);

    // Scan a line starting at offset 'offset' according to the given format
    // (compatible with scanf); if not all fields are read (according to the
    // field_count argument), bail out with an error.  Advance to the next line.
    void scanStringAtOffset(int offset, const char *fmt, int field_count, ...);

    // Just like scanString(), but without advancing to the next line.
    void scanStringNoNewLine(const char *fmt, int field_count, ...);

    // Just like scanStringAtOffset(), but without advancing to the next line.
    void scanStringAtOffsetNoNewLine(int offset, const char *fmt, int field_count, ...);

private:
    Common::String _fname;
    char *_stringData;
    char *_currLine;
    int _numLines, _lineIndex;
    char **_lines;

    void processLine();
};

} // end of namespace Grim

#endif