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//
// VMime library (http://www.vmime.org)
// Copyright (C) 2002-2013 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 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/charset.hpp"
#include "vmime/exception.hpp"
#include "vmime/platform.hpp"
#include "vmime/encoding.hpp"
#include "vmime/utility/stringUtils.hpp"
#include "vmime/charsetConverter.hpp"
namespace vmime
{
charset::charset()
: m_name(charsets::US_ASCII)
{
}
charset::charset(const string& name)
: m_name(name)
{
// If we receive this rfc-1642 valid MIME charset, convert it to something usefull for iconv
if (utility::stringUtils::isStringEqualNoCase(m_name, "unicode-1-1-utf-7"))
m_name = "utf-7";
}
charset::charset(const char* name)
: m_name(name)
{
}
void charset::parseImpl
(const parsingContext& /* ctx */, const string& buffer, const string::size_type position,
const string::size_type end, string::size_type* newPosition)
{
m_name = utility::stringUtils::trim
(string(buffer.begin() + position, buffer.begin() + end));
// If we parsed this rfc-1642 valid MIME charset, convert it to something usefull for iconv
if (utility::stringUtils::isStringEqualNoCase(m_name, "unicode-1-1-utf-7"))
m_name = "utf-7";
setParsedBounds(position, end);
if (newPosition)
*newPosition = end;
}
void charset::generateImpl
(const generationContext& /* ctx */, utility::outputStream& os,
const string::size_type curLinePos, string::size_type* newLinePos) const
{
os << m_name;
if (newLinePos)
*newLinePos = curLinePos + m_name.length();
}
void charset::convert(utility::inputStream& in, utility::outputStream& out,
const charset& source, const charset& dest,
const charsetConverterOptions& opts)
{
shared_ptr <charsetConverter> conv = charsetConverter::create(source, dest, opts);
conv->convert(in, out);
}
void charset::convert(const string& in, string& out, const charset& source, const charset& dest,
const charsetConverterOptions& opts)
{
if (source == dest)
{
out = in;
return;
}
shared_ptr <charsetConverter> conv = charsetConverter::create(source, dest, opts);
conv->convert(in, out);
}
const charset charset::getLocalCharset()
{
return (platform::getHandler()->getLocalCharset());
}
charset& charset::operator=(const charset& other)
{
copyFrom(other);
return (*this);
}
bool charset::operator==(const charset& value) const
{
return (utility::stringUtils::isStringEqualNoCase(m_name, value.m_name));
}
bool charset::operator!=(const charset& value) const
{
return !(*this == value);
}
shared_ptr <component> charset::clone() const
{
return make_shared <charset>(m_name);
}
const string& charset::getName() const
{
return (m_name);
}
void charset::copyFrom(const component& other)
{
m_name = dynamic_cast <const charset&>(other).m_name;
}
const std::vector <shared_ptr <component> > charset::getChildComponents()
{
return std::vector <shared_ptr <component> >();
}
// Explicitly force encoding for some charsets
struct CharsetEncodingEntry
{
CharsetEncodingEntry(const string& charset_, const string& encoding_)
: charset(charset_), encoding(encoding_)
{
}
const string charset;
const string encoding;
};
CharsetEncodingEntry g_charsetEncodingMap[] =
{
// Use QP encoding for ISO-8859-x charsets
CharsetEncodingEntry("iso-8859", encodingTypes::QUOTED_PRINTABLE),
CharsetEncodingEntry("iso8859", encodingTypes::QUOTED_PRINTABLE),
// RFC-1468 states:
// " ISO-2022-JP may also be used in MIME Part 2 headers. The "B"
// encoding should be used with ISO-2022-JP text. "
// Use Base64 encoding for all ISO-2022 charsets.
CharsetEncodingEntry("iso-2022", encodingTypes::BASE64),
CharsetEncodingEntry("iso2022", encodingTypes::BASE64),
// Last entry is not used
CharsetEncodingEntry("", "")
};
bool charset::getRecommendedEncoding(encoding& enc) const
{
// Special treatment for some charsets
const string cset = utility::stringUtils::toLower(getName());
for (unsigned int i = 0 ; i < (sizeof(g_charsetEncodingMap) / sizeof(g_charsetEncodingMap[0])) - 1 ; ++i)
{
if (cset.find(g_charsetEncodingMap[i].charset) != string::npos)
{
enc = g_charsetEncodingMap[i].encoding;
return true;
}
}
return false;
}
} // vmime
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