1 files changed, 111 insertions, 0 deletions
diff --git a/vmime-master/src/vmime/utility/seekableInputStreamRegionAdapter.cpp b/vmime-master/src/vmime/utility/seekableInputStreamRegionAdapter.cpp
new file mode 100644
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--- /dev/null
+++ b/vmime-master/src/vmime/utility/seekableInputStreamRegionAdapter.cpp
@@ -0,0 +1,111 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002 Vincent Richard <vincent@vmime.org>
+//
+// 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 3 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.
+//
+// Linking this library statically or dynamically with other modules is making
+// a combined work based on this library.  Thus, the terms and conditions of
+// the GNU General Public License cover the whole combination.
+//
+
+#include "vmime/utility/seekableInputStreamRegionAdapter.hpp"
+
+
+namespace vmime {
+namespace utility {
+
+
+seekableInputStreamRegionAdapter::seekableInputStreamRegionAdapter(
+	const shared_ptr <seekableInputStream>& stream,
+	const size_t begin,
+	const size_t length
+)
+	: m_stream(stream),
+	  m_begin(begin),
+	  m_length(length),
+	  m_position(0) {
+
+}
+
+
+bool seekableInputStreamRegionAdapter::eof() const {
+
+	return m_position >= m_length;
+}
+
+
+void seekableInputStreamRegionAdapter::reset() {
+
+	m_position = 0;
+}
+
+
+size_t seekableInputStreamRegionAdapter::read(byte_t* const data, const size_t count) {
+
+	m_stream->seek(m_begin + m_position);
+
+	size_t readBytes = 0;
+
+	if (m_position + count >= m_length) {
+
+		const size_t remaining = m_length - m_position;
+		readBytes = m_stream->read(data, remaining);
+
+	} else {
+
+		readBytes = m_stream->read(data, count);
+	}
+
+	m_position += readBytes;
+
+	return readBytes;
+}
+
+
+size_t seekableInputStreamRegionAdapter::skip(const size_t count) {
+
+	if (m_position + count >= m_length) {
+
+		const size_t remaining = m_length - m_position;
+		m_position += remaining;
+		return remaining;
+
+	} else {
+
+		m_position += count;
+		return count;
+	}
+}
+
+
+size_t seekableInputStreamRegionAdapter::getPosition() const {
+
+	return m_position;
+}
+
+
+void seekableInputStreamRegionAdapter::seek(const size_t pos) {
+
+	if (pos > m_length) {
+		m_position = m_length;
+	} else {
+		m_position = pos;
+	}
+}
+
+
+} // utility
+} // vmime