Initial import.

1 files changed, 161 insertions, 0 deletions

diff --git a/src/encoding.cpp b/src/encoding.cpp
new file mode 100644
index 00000000..c797cf18
--- /dev/null
+++ b/src/encoding.cpp
@@ -0,0 +1,161 @@
+//
+// VMime library (http://vmime.sourceforge.net)
+// Copyright (C) 2002-2004 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 "encoding.hpp"
+#include "encoderFactory.hpp"
+#include "contentHandler.hpp"
+
+#include <algorithm>
+
+
+namespace vmime
+{
+
+
+encoding::encoding()
+	: m_name(encodingTypes::SEVEN_BIT)
+{
+}
+
+
+encoding::encoding(const string& name)
+	: m_name(toLower(name))
+{
+}
+
+
+encoding::encoding(const encoding& enc)
+	: component(), m_name(enc.m_name)
+{
+}
+
+
+void encoding::parse(const string& buffer, const string::size_type position,
+	const string::size_type end, string::size_type* newPosition)
+{
+	m_name = toLower(string(buffer.begin() + position, buffer.begin() + end));
+
+	if (newPosition)
+		*newPosition = end;
+}
+
+
+void encoding::generate(utility::outputStream& os, const string::size_type /* maxLineLength */,
+	const string::size_type curLinePos, string::size_type* newLinePos) const
+{
+	os << m_name;
+
+	if (newLinePos)
+		*newLinePos = curLinePos + m_name.length();
+}
+
+
+encoder* encoding::getEncoder() const
+{
+	return (encoderFactory::getInstance()->create(generate()));
+}
+
+
+encoding& encoding::operator=(const encoding& source)
+{
+	m_name = source.m_name;
+	return (*this);
+}
+
+
+encoding& encoding::operator=(const string& name)
+{
+	m_name = toLower(name);
+	return (*this);
+}
+
+
+const bool encoding::operator==(const encoding& value) const
+{
+	return (toLower(m_name) == value.m_name);
+}
+
+
+const bool encoding::operator!=(const encoding& value) const
+{
+	return !(*this == value);
+}
+
+
+const encoding encoding::decide
+	(const string::const_iterator begin, const string::const_iterator end)
+{
+	const string::difference_type length = end - begin;
+	const string::difference_type count = std::count_if
+		(begin, end, std::bind2nd(std::less<unsigned char>(), 127));
+
+	// All is in 7-bit US-ASCII --> 7-bit (or Quoted-Printable...)
+	if (length == count)
+	{
+		// Now, we check if there is any line with more than
+		// "lineLengthLimits::convenient" characters (7-bit requires that)
+		string::const_iterator p = begin;
+
+		const string::size_type maxLen = lineLengthLimits::convenient;
+		string::size_type len = 0;
+
+		for ( ; p != end && len <= maxLen ; )
+		{
+			if (*p == '\n')
+			{
+				len = 0;
+				++p;
+
+				// May or may not need to be encoded, we don't take
+				// any risk (avoid problems with SMTP)
+				if (p != end && *p == '.')
+					len = maxLen + 1;
+			}
+			else
+			{
+				++len;
+				++p;
+			}
+		}
+
+		if (len > maxLen)
+			return (encoding(encodingTypes::QUOTED_PRINTABLE));
+		else
+			return (encoding(encodingTypes::SEVEN_BIT));
+	}
+	// Less than 20% non US-ASCII --> Quoted-Printable
+	else if ((length - count) <= length / 5)
+	{
+		return (encoding(encodingTypes::QUOTED_PRINTABLE));
+	}
+	// Otherwise --> Base64
+	else
+	{
+		return (encoding(encodingTypes::BASE64));
+	}
+}
+
+
+const encoding encoding::decide(const contentHandler& /* data */)
+{
+	return (encoding(encodingTypes::BASE64));
+}
+
+
+} // vmime