1 files changed, 159 insertions, 0 deletions
diff --git a/fbreader/src/formats/pdb/PluckerTextStream.cpp b/fbreader/src/formats/pdb/PluckerTextStream.cpp
new file mode 100644
index 0000000..01291eb
--- /dev/null
+++ b/fbreader/src/formats/pdb/PluckerTextStream.cpp
@@ -0,0 +1,159 @@
+/*
+ * 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 <ZLFile.h>
+#include <ZLZDecompressor.h>
+
+#include "PluckerTextStream.h"
+#include "PdbReader.h"
+#include "DocDecompressor.h"
+
+PluckerTextStream::PluckerTextStream(const ZLFile &file) : PdbStream(file) {
+	myFullBuffer = 0;
+}
+
+PluckerTextStream::~PluckerTextStream() {
+	close();
+}
+
+bool PluckerTextStream::open() {
+	if (!PdbStream::open()) {
+		return false;
+	}
+
+	PdbUtil::readUnsignedShort(*myBase, myCompressionVersion);
+
+	myBuffer = new char[65536];
+	myFullBuffer = new char[65536];
+
+	myRecordIndex = 0;
+
+	return true;
+}
+
+bool PluckerTextStream::fillBuffer() {
+	while (myBufferOffset == myBufferLength) {
+		if (myRecordIndex + 1 > header().Offsets.size() - 1) {
+			return false;
+		}
+		++myRecordIndex;
+		const std::size_t currentOffset = recordOffset(myRecordIndex);
+		if (currentOffset < myBase->offset()) {
+			return false;
+		}
+		myBase->seek(currentOffset, true);
+		const std::size_t nextOffset = recordOffset(myRecordIndex + 1);
+		if (nextOffset < currentOffset) {
+			return false;
+		}
+		processRecord(nextOffset - currentOffset);
+	}
+	return true;
+}
+
+void PluckerTextStream::close() {
+	if (myFullBuffer != 0) {
+		delete[] myFullBuffer;
+		myFullBuffer = 0;
+	}
+	PdbStream::close();
+}
+
+void PluckerTextStream::processRecord(std::size_t recordSize) {
+	myBase->seek(2, false);
+
+	unsigned short paragraphs;
+	PdbUtil::readUnsignedShort(*myBase, paragraphs);
+
+	unsigned short size;
+	PdbUtil::readUnsignedShort(*myBase, size);
+
+	unsigned char type;
+	myBase->read((char*)&type, 1);
+	if (type > 1) { // this record is not text record
+		return;
+	}
+
+	myBase->seek(1, false);
+
+	std::vector<int> pars;
+	for (int i = 0; i < paragraphs; ++i) {
+		unsigned short pSize;
+		PdbUtil::readUnsignedShort(*myBase, pSize);
+		pars.push_back(pSize);
+		myBase->seek(2, false);
+	}
+
+	bool doProcess = false;
+	if (type == 0) {
+		doProcess = myBase->read(myFullBuffer, size) == size;
+	} else if (myCompressionVersion == 1) {
+		doProcess =
+			DocDecompressor().decompress(*myBase, myFullBuffer, recordSize - 8 - 4 * paragraphs, size) == size;
+	} else if (myCompressionVersion == 2) {
+		myBase->seek(2, false);
+		doProcess =
+			ZLZDecompressor(recordSize - 10 - 4 * paragraphs).decompress(*myBase, myFullBuffer, size) == size;
+	}
+	if (doProcess) {
+		myBufferLength = 0;
+		myBufferOffset = 0;
+
+		char *start = myFullBuffer;
+		char *end = myFullBuffer;
+
+		for (std::vector<int>::const_iterator it = pars.begin(); it != pars.end(); ++it) {
+			start = end;
+			end = start + *it;
+			if (end > myFullBuffer + size) {
+				break;
+			}
+			processTextParagraph(start, end);
+		}
+	}
+}
+
+void PluckerTextStream::processTextParagraph(char *start, char *end) {
+	char *textStart = start;
+	bool functionFlag = false;
+	for (char *ptr = start; ptr < end; ++ptr) {
+		if (*ptr == 0) {
+			functionFlag = true;
+			if (ptr != textStart) {
+				std::memcpy(myBuffer + myBufferLength, textStart, ptr - textStart);
+				myBufferLength += ptr - textStart;
+			}
+		} else if (functionFlag) {
+			int paramCounter = ((unsigned char)*ptr) % 8;
+			if (end - ptr > paramCounter + 1) {
+				ptr += paramCounter;
+			} else {
+				ptr = end - 1;
+			}
+			functionFlag = false;
+			textStart = ptr + 1;
+		}
+	}
+	if (end != textStart) {
+		std::memcpy(myBuffer + myBufferLength, textStart, end - textStart);
+		myBufferLength += end - textStart;
+	}
+}