1 files changed, 124 insertions, 0 deletions
diff --git a/fbreader/src/formats/util/XMLTextStream.cpp b/fbreader/src/formats/util/XMLTextStream.cpp
new file mode 100644
index 0000000..19343a1
--- /dev/null
+++ b/fbreader/src/formats/util/XMLTextStream.cpp
@@ -0,0 +1,124 @@
+/*
+ * Copyright (C) 2008-2012 Geometer Plus <[email protected]>
+ *
+ * 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 <ZLXMLReader.h>
+#include <ZLUnicodeUtil.h>
+
+#include <ZLPlainAsynchronousInputStream.h>
+
+#include "XMLTextStream.h"
+
+class XMLTextReader : public ZLXMLReader {
+
+public:
+	XMLTextReader(std::string &buffer, const std::string &startTag);
+
+private:
+	void startElementHandler(const char *tag, const char **attributes);
+	void characterDataHandler(const char *text, std::size_t len);
+
+private:
+	const std::string myStartTag;
+	std::string &myBuffer;
+	bool myStarted;
+};
+
+XMLTextReader::XMLTextReader(std::string &buffer, const std::string &startTag) : myStartTag(ZLUnicodeUtil::toLower(startTag)), myBuffer(buffer), myStarted(myStartTag.empty()) {
+}
+
+void XMLTextReader::startElementHandler(const char *tag, const char**) {
+	if (!myStarted && (myStartTag == ZLUnicodeUtil::toLower(tag))) {
+		myStarted = true;
+	}
+}
+
+void XMLTextReader::characterDataHandler(const char *text, std::size_t len) {
+	if (myStarted) {
+		myBuffer.append(text, len);
+	}
+}
+
+XMLTextStream::XMLTextStream(shared_ptr<ZLInputStream> base, const std::string &startTag) : myBase(base), myStreamBuffer(2048, '\0') {
+	myReader = new XMLTextReader(myDataBuffer, startTag);
+}
+
+XMLTextStream::~XMLTextStream() {
+}
+
+bool XMLTextStream::open() {
+	close();
+	if (myBase.isNull() || !myBase->open()) {
+		return false;
+	}
+	myStream = new ZLPlainAsynchronousInputStream();
+	myOffset = 0;
+	return true;
+}
+
+std::size_t XMLTextStream::read(char *buffer, std::size_t maxSize) {
+	while (myDataBuffer.size() < maxSize) {
+		std::size_t len = myBase->read((char*)myStreamBuffer.data(), 2048);
+		/*if ((len == 0) || !myReader->readFromBuffer(myStreamBuffer.data(), len)) {
+			break;
+		}*/
+		if (len == 0) {
+			break;
+		}
+		myStream->setBuffer(myStreamBuffer.data(), len);
+		if (!myReader->readDocument(myStream)) {
+			break;
+		}
+	}
+	std::size_t realSize = std::min(myDataBuffer.size(), maxSize);
+	if (buffer != 0) {
+		std::memcpy(buffer, myDataBuffer.data(), realSize);
+	}
+	myDataBuffer.erase(0, realSize);
+	myOffset += realSize;
+	return realSize;
+}
+
+void XMLTextStream::close() {
+	if (!myStream.isNull()) {
+		myStream->setEof();
+		myReader->readDocument(myStream);
+		myStream.reset();
+	}
+	myBase->close();
+	myDataBuffer.erase();
+}
+
+void XMLTextStream::seek(int offset, bool absoluteOffset) {
+	// works for nonnegative offsets only
+	if (absoluteOffset) {
+		offset -= myOffset;
+	}
+	read(0, offset);
+}
+
+std::size_t XMLTextStream::offset() const {
+	return myOffset;
+}
+
+std::size_t XMLTextStream::sizeOfOpened() {
+	// couldn't be implemented
+	return 0;
+}