synchronization with C++ version

jni/NativeFormats/fbreader/src/formats/doc/DocStreams.cpp

@@ -0,0 +1,197 @@
+/*
+ * 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.
+ */
+
+#include <cstring>
+#include <cstdlib>
+#include <string>
+
+#include "DocStreams.h"
+#include "OleStreamReader.h"
+
+class DocReader : public OleStreamReader {
+
+public:
+	DocReader(char *buffer, size_t maxSize);
+	~DocReader();
+	size_t readSize() const;
+
+private:
+	bool readStream(OleMainStream &stream);
+	void dataHandler(const char *buffer, size_t len);
+	void ansiSymbolHandler(ZLUnicodeUtil::Ucs2Char symbol);
+	void footnoteHandler();
+
+protected:
+	char *myBuffer;
+	const size_t myMaxSize;
+	size_t myActualSize;
+};
+
+class DocCharReader : public DocReader {
+
+public:
+	DocCharReader(char *buffer, size_t maxSize);
+	~DocCharReader();
+
+private:
+	void dataHandler(const char *buffer, size_t len);
+};
+
+class DocAnsiReader : public DocReader {
+
+public:
+	DocAnsiReader(char *buffer, size_t maxSize);
+	~DocAnsiReader();
+
+private:
+	void ansiSymbolHandler(ZLUnicodeUtil::Ucs2Char symbol);
+};
+
+DocReader::DocReader(char *buffer, size_t maxSize) : myBuffer(buffer), myMaxSize(maxSize), myActualSize(0) {
+}
+
+DocReader::~DocReader() {
+}
+
+bool DocReader::readStream(OleMainStream &stream) {
+	while (myActualSize < myMaxSize) {
+		if (!readNextPiece(stream)) {
+			break;
+		}
+	}
+	return true;
+}
+
+void DocReader::dataHandler(const char*, size_t) {
+}
+
+void DocReader::ansiSymbolHandler(ZLUnicodeUtil::Ucs2Char) {
+}
+
+void DocReader::footnoteHandler() {
+}
+
+size_t DocReader::readSize() const {
+	return myActualSize;
+}
+
+DocCharReader::DocCharReader(char *buffer, size_t maxSize) : DocReader(buffer, maxSize) {
+}
+
+DocCharReader::~DocCharReader() {
+}
+
+void DocCharReader::dataHandler(const char *buffer, size_t dataLength) {
+	if (myActualSize < myMaxSize) {
+		const size_t len = std::min(dataLength, myMaxSize - myActualSize);
+		strncpy(myBuffer + myActualSize, buffer, len);
+		myActualSize += len;
+	}
+}
+
+DocAnsiReader::DocAnsiReader(char *buffer, size_t maxSize) : DocReader(buffer, maxSize) {
+}
+
+DocAnsiReader::~DocAnsiReader() {
+}
+
+void DocAnsiReader::ansiSymbolHandler(ZLUnicodeUtil::Ucs2Char symbol) {
+	if (myActualSize < myMaxSize) {
+		char buffer[4];
+		const size_t dataLength = ZLUnicodeUtil::ucs2ToUtf8(buffer, symbol);
+		const size_t len = std::min(dataLength, myMaxSize - myActualSize);
+		strncpy(myBuffer + myActualSize, buffer, len);
+		myActualSize += len;
+	}
+}
+
+DocStream::DocStream(const ZLFile& file, size_t maxSize) : myFile(file), myBuffer(0), mySize(maxSize) {
+}
+
+DocStream::~DocStream() {
+	close();
+}
+
+bool DocStream::open() {
+	if (mySize != 0) {
+		myBuffer = new char[mySize];
+	}
+	shared_ptr<DocReader> reader = createReader(myBuffer, mySize);
+	shared_ptr<ZLInputStream> stream = myFile.inputStream();
+	if (stream.isNull() || !stream->open()) {
+		return false;
+	}
+	if (!reader->readDocument(stream)) {
+		return false;
+	}
+	mySize = reader->readSize();
+	myOffset = 0;
+	return true;
+}
+
+size_t DocStream::read(char *buffer, size_t maxSize) {
+	maxSize = std::min(maxSize, mySize - myOffset);
+	if ((buffer != 0) && (myBuffer !=0)) {
+		memcpy(buffer, myBuffer + myOffset, maxSize);
+	}
+	myOffset += maxSize;
+	return maxSize;
+}
+
+void DocStream::close() {
+	if (myBuffer != 0) {
+		delete[] myBuffer;
+		myBuffer = 0;
+	}
+}
+
+void DocStream::seek(int offset, bool absoluteOffset) {
+	if (!absoluteOffset) {
+		offset += myOffset;
+	}
+	myOffset = std::min(mySize, (size_t)std::max(0, offset));
+}
+
+size_t DocStream::offset() const {
+	return myOffset;
+}
+
+size_t DocStream::sizeOfOpened() {
+	return mySize;
+}
+
+DocCharStream::DocCharStream(const ZLFile& file, size_t maxSize) : DocStream(file, maxSize) {
+}
+
+DocCharStream::~DocCharStream() {
+}
+
+shared_ptr<DocReader> DocCharStream::createReader(char *buffer, size_t maxSize) {
+	return new DocCharReader(buffer, maxSize);
+}
+
+DocAnsiStream::DocAnsiStream(const ZLFile& file, size_t maxSize) : DocStream(file, maxSize) {
+}
+
+DocAnsiStream::~DocAnsiStream() {
+}
+
+shared_ptr<DocReader> DocAnsiStream::createReader(char *buffer, size_t maxSize) {
+	return new DocAnsiReader(buffer, maxSize);
+}