1 files changed, 115 insertions, 0 deletions
diff --git a/src/utility/filteredStream.cpp b/src/utility/filteredStream.cpp
new file mode 100644
index 00000000..9586f165
--- /dev/null
+++ b/src/utility/filteredStream.cpp
@@ -0,0 +1,115 @@
+//
+// VMime library (http://www.vmime.org)
+// Copyright (C) 2002-2005 Vincent Richard <[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., 675 Mass Ave, Cambridge, MA 02139, USA.
+//
+
+#include "vmime/utility/filteredStream.hpp"
+
+
+namespace vmime {
+namespace utility {
+
+
+// dotFilteredOutputStream
+
+dotFilteredOutputStream::dotFilteredOutputStream(outputStream& os)
+	: m_stream(os)
+{
+}
+
+
+outputStream& dotFilteredOutputStream::getNextOutputStream()
+{
+	return (m_stream);
+}
+
+
+void dotFilteredOutputStream::write
+	(const value_type* const data, const size_type count)
+{
+	const value_type* pos = data;
+	const value_type* end = data + count;
+	const value_type* start = data;
+
+	// Replace "\n." with "\n.."
+	while ((pos = std::find(pos, end, '.')) != end)
+	{
+		const value_type previousChar =
+			(pos == data ? m_previousChar : *(pos - 1));
+
+		if (previousChar == '\n')
+		{
+			m_stream.write(start, pos - data);
+			m_stream.write("..", 2);
+
+			start = pos + 1;
+		}
+
+		++pos;
+	}
+
+	m_stream.write(start, end - start);
+	m_previousChar = data[count - 1];
+}
+
+
+// CRLFToLFFilteredOutputStream
+
+CRLFToLFFilteredOutputStream::CRLFToLFFilteredOutputStream(outputStream& os)
+	: m_stream(os)
+{
+}
+
+
+outputStream& CRLFToLFFilteredOutputStream::getNextOutputStream()
+{
+	return (m_stream);
+}
+
+
+void CRLFToLFFilteredOutputStream::write
+	(const value_type* const data, const size_type count)
+{
+	const value_type* pos = data;
+	const value_type* end = data + count;
+	const value_type* start = data;
+
+	// Replace "\r\n" (CRLF) with "\n" (LF)
+	while ((pos = std::find(pos, end, '\n')) != end)
+	{
+		const value_type previousChar =
+			(pos == data ? m_previousChar : *(pos - 1));
+
+		if (previousChar == '\r')
+		{
+			m_stream.write(start, pos - 1 - data);  // do not write \r
+			m_stream.write("\n", 1);
+
+			start = pos + 1;
+		}
+
+		++pos;
+	}
+
+	m_stream.write(start, end - start);
+	m_previousChar = data[count - 1];
+}
+
+
+} // utility
+} // vmime
+