151 lines
3.8 KiB
C++
151 lines
3.8 KiB
C++
//
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// VMime library (http://www.vmime.org)
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// Copyright (C) 2002-2005 Vincent Richard <vincent@vincent-richard.net>
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//
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// This program is free software; you can redistribute it and/or
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// modify it under the terms of the GNU General Public License as
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// published by the Free Software Foundation; either version 2 of
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// the License, or (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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// General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License along
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// with this program; if not, write to the Free Software Foundation, Inc.,
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// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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//
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// Linking this library statically or dynamically with other modules is making
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// a combined work based on this library. Thus, the terms and conditions of
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// the GNU General Public License cover the whole combination.
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//
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#ifndef VMIME_CHARSETCONVERTER_HPP_INCLUDED
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#define VMIME_CHARSETCONVERTER_HPP_INCLUDED
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#include "vmime/base.hpp"
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#include "vmime/component.hpp"
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#include "vmime/charset.hpp"
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#include "vmime/utility/filteredStream.hpp"
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namespace vmime
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{
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/** Convert between charsets.
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*/
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class charsetConverter : public object
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{
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public:
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/** Construct and initialize a charset converter.
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*
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* @param source input charset
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* @param dest output charset
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*/
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charsetConverter(const charset& source, const charset& dest);
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~charsetConverter();
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/** Convert a string buffer from one charset to another
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* charset (in-memory conversion)
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*
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* \deprecated Use the new convert() method, which takes
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* an outputStream parameter.
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*
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* @param in input buffer
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* @param out output buffer
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* @throws exceptions::charset_conv_error if an error occured during
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* the conversion
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*/
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void convert(const string& in, string& out);
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/** Convert the contents of an input stream in a specified charset
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* to another charset and write the result to an output stream.
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*
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* @param in input stream to read data from
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* @param out output stream to write the converted data
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* @throws exceptions::charset_conv_error if an error occured during
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* the conversion
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*/
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void convert(utility::inputStream& in, utility::outputStream& out);
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private:
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void* m_desc;
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charset m_source;
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charset m_dest;
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};
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namespace utility {
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/** A filtered output stream which applies a charset conversion
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* to input bytes.
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*
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* May throw a exceptions::charset_conv_error if an error
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* occured when initializing convert, or during charset conversion.
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*/
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class charsetFilteredOutputStream : public filteredOutputStream
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{
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public:
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/** Construct a new filter for the specified output stream.
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*
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* @param source input charset
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* @param dest output charset
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* @param os stream into which write filtered data
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*/
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charsetFilteredOutputStream
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(const charset& source, const charset& dest, outputStream& os);
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~charsetFilteredOutputStream();
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outputStream& getNextOutputStream();
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void write(const value_type* const data, const size_type count);
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void flush();
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private:
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// Maximum character width in any charset
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enum { MAX_CHARACTER_WIDTH = 128 };
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void* m_desc;
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const charset m_sourceCharset;
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const charset m_destCharset;
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outputStream& m_stream;
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// Buffer in which unconverted bytes are left until they can
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// be converted (when more data arrives). The length should be
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// large enough to contain any character in any charset.
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value_type m_unconvBuffer[MAX_CHARACTER_WIDTH];
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size_type m_unconvCount;
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// Buffer used for conversion. Avoids declaring it in write().
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// Should be at least MAX_CHARACTER_WIDTH * MAX_CHARACTER_WIDTH.
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value_type m_outputBuffer[32768];
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};
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} // utility
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} // vmime
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#endif // VMIME_CHARSETCONVERTER_HPP_INCLUDED
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