1 files changed, 128 insertions, 0 deletions
diff --git a/fbreader/src/formats/chm/CHMFile.h b/fbreader/src/formats/chm/CHMFile.h
new file mode 100644
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+++ b/fbreader/src/formats/chm/CHMFile.h
@@ -0,0 +1,128 @@
+/*
+ * 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 &sectionInfo, 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__ */