1 files changed, 109 insertions, 0 deletions
diff --git a/reader/src/formats/pdb/PdbStream.cpp b/reader/src/formats/pdb/PdbStream.cpp
new file mode 100644
index 0000000..219a0de
--- /dev/null
+++ b/reader/src/formats/pdb/PdbStream.cpp
@@ -0,0 +1,109 @@
+/*
+ * 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 "PdbStream.h"
+
+PdbStream::PdbStream(const ZLFile &file) : myBase(file.inputStream()) {
+	myBuffer = 0;
+}
+
+PdbStream::~PdbStream() {
+}
+
+bool PdbStream::open() {
+	close();
+	if (myBase.isNull() || !myBase->open() || !myHeader.read(myBase)) {
+		return false;
+	}
+	// myBase offset: startOffset + 78 + 8 * records number ( myHeader.Offsets.size() )
+	
+	myBase->seek(myHeader.Offsets[0], true);
+	// myBase offset: Offset[0] - zero record
+	
+	myBufferLength = 0;
+	myBufferOffset = 0;
+
+	myOffset = 0;
+
+	return true;
+}
+
+std::size_t PdbStream::read(char *buffer, std::size_t maxSize) {
+	std::size_t realSize = 0;
+	while (realSize < maxSize) {
+		if (!fillBuffer()) {
+			break;
+		}
+		std::size_t size = std::min((std::size_t)(maxSize - realSize), (std::size_t)(myBufferLength - myBufferOffset));
+		
+		if (size > 0) {
+			if (buffer != 0) {
+				std::memcpy(buffer + realSize, myBuffer + myBufferOffset, size);
+			}
+			realSize += size;
+			myBufferOffset += size;
+		}
+	}
+			
+	myOffset += realSize;
+	return realSize;
+}
+
+void PdbStream::close() {
+	if (!myBase.isNull()) {
+		myBase->close();
+	}
+	if (myBuffer != 0) {
+		delete[] myBuffer;
+		myBuffer = 0;
+	}
+}
+
+void PdbStream::seek(int offset, bool absoluteOffset) {
+	if (absoluteOffset) {
+		offset -= this->offset();
+	}
+	if (offset > 0) {
+		read(0, offset);
+	} else if (offset < 0) {
+		offset += this->offset();
+		open();
+		if (offset >= 0) {
+			read(0, offset);
+		}
+	}
+}
+
+std::size_t PdbStream::offset() const {
+	return myOffset;
+}
+
+std::size_t PdbStream::sizeOfOpened() {
+	// TODO: implement
+	return 0;
+}
+
+std::size_t PdbStream::recordOffset(std::size_t index) const {
+	return index < myHeader.Offsets.size() ? 
+		myHeader.Offsets[index] : myBase->sizeOfOpened();
+}