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Diffstat (limited to 'src/vmime/charset.cpp')
| -rw-r--r-- | src/vmime/charset.cpp | 210 |
1 files changed, 210 insertions, 0 deletions
diff --git a/src/vmime/charset.cpp b/src/vmime/charset.cpp new file mode 100644 index 00000000..22bff301 --- /dev/null +++ b/src/vmime/charset.cpp @@ -0,0 +1,210 @@ +// +// 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 size_t position, + const size_t end, size_t* 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 size_t curLinePos, size_t* 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 |