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/*
* Copyright (C) 2004-2012 Geometer Plus <contact@geometerplus.com>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
#ifndef __CHMFILE_H__
#define __CHMFILE_H__
#include <string>
#include <map>
#include <vector>
#include <shared_ptr.h>
#include <ZLInputStream.h>
class ZLFile;
class LZXDecompressor;
class CHMFileInfo {
public:
struct FileNames {
std::string TOC;
std::string Index;
std::string Start;
std::string Home;
bool empty() const;
};
public:
CHMFileInfo(const ZLFile &file);
bool init(ZLInputStream &stream);
// We assume that base exists and is already open
shared_ptr<ZLInputStream> entryStream(shared_ptr<ZLInputStream> base, const std::string &name) const;
// We assume that base exists and is already open
FileNames sectionNames(shared_ptr<ZLInputStream> base) const;
const std::string filePath() const;
private:
bool moveToEntry(ZLInputStream &stream, const std::string &entryName);
private:
unsigned long long mySection0Offset;
struct RecordInfo {
RecordInfo(int section, int offset, int length) : Section(section), Offset(offset), Length(length) {}
std::size_t Section;
std::size_t Offset;
std::size_t Length;
};
typedef std::map<std::string,RecordInfo> RecordMap;
RecordMap myRecords;
std::vector<std::string> mySectionNames;
struct SectionInfo {
std::size_t WindowSizeIndex;
std::size_t ResetInterval;
std::size_t Offset;
std::size_t Length;
std::size_t CompressedSize;
std::size_t UncompressedSize;
std::vector<std::size_t> ResetTable;
};
std::vector<SectionInfo> mySectionInfos;
const std::string myFilePath;
private:
CHMFileInfo(const CHMFileInfo&);
const CHMFileInfo &operator = (const CHMFileInfo&);
friend class CHMInputStream;
};
class CHMInputStream : public ZLInputStream {
public:
CHMInputStream(shared_ptr<ZLInputStream> base, const CHMFileInfo::SectionInfo §ionInfo, std::size_t offset, std::size_t size);
~CHMInputStream();
bool open();
std::size_t read(char *buffer, std::size_t maxSize);
void close();
void seek(int offset, bool absoluteOffset);
std::size_t offset() const;
std::size_t sizeOfOpened();
private:
std::size_t do_read(char *buffer, std::size_t maxSize);
private:
shared_ptr<ZLInputStream> myBase;
const CHMFileInfo::SectionInfo mySectionInfo;
std::size_t myBaseStartIndex;
std::size_t myBaseIndex;
std::size_t myBytesToSkip;
const std::size_t mySize;
std::size_t myOffset;
bool myDoSkip;
shared_ptr<LZXDecompressor> myDecompressor;
std::string myInData;
unsigned char *myOutData;
std::size_t myOutDataOffset;
std::size_t myOutDataLength;
};
#endif /* __CHMFILE_H__ */
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