126 lines
4.2 KiB
C++
126 lines
4.2 KiB
C++
//
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// VMime library (http://vmime.sourceforge.net)
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// Copyright (C) 2002-2004 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
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// along with this program; if not, write to the Free Software
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// Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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//
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#ifndef VMIME_CONTENTHANDLER_HPP_INCLUDED
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#define VMIME_CONTENTHANDLER_HPP_INCLUDED
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#include <limits>
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#include "base.hpp"
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#include "utility/stringProxy.hpp"
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#include "utility/smartPtr.hpp"
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#include "encoding.hpp"
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namespace vmime
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{
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class contentHandler
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{
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private:
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static const vmime::encoding NO_ENCODING;
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public:
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contentHandler();
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contentHandler(const string& buffer, const vmime::encoding& enc = NO_ENCODING); // for compatibility
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~contentHandler();
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// Copy
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contentHandler(const contentHandler& cts);
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contentHandler& operator=(const contentHandler& cts);
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// Set the data contained in the body.
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//
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// The two first functions take advantage of the COW (copy-on-write) system that
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// might be implemented into std::string. This is done using "stringProxy" object.
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//
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// Set "enc" parameter to anything other than NO_ENCODING if the data managed by
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// this content handler is already encoded with the specified encoding (so, no
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// encoding/decoding will be performed on generate()/extract()). Note that the
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// data may be re-encoded (that is, decoded and encoded) if the encoding passed
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// to generate() is different from this one...
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//
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// The 'length' parameter is optional (user-defined). You can pass 0 if you want,
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// VMime does not make use of it.
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void setData(const utility::stringProxy& str, const vmime::encoding& enc = NO_ENCODING);
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void setData(const string& buffer, const vmime::encoding& enc = NO_ENCODING);
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void setData(const string& buffer, const string::size_type start, const string::size_type end, const vmime::encoding& enc = NO_ENCODING);
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void setData(utility::inputStream* const is, const utility::stream::size_type length, const bool own, const vmime::encoding& enc = NO_ENCODING);
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// For compatibility
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contentHandler& operator=(const string& buffer);
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// WRITE: Output the contents into the specified stream. Data will be
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// encoded before being written into the stream. This is used internally
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// by the body object to generate the message, you may not need to use
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// this (see function extract() if you want to get the contents).
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void generate(utility::outputStream& os, const vmime::encoding& enc, const string::size_type maxLineLength = lineLengthLimits::infinite) const;
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// READ: Extract the contents into the specified stream. If needed, data
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// will be decoded before being written into the stream.
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void extract(utility::outputStream& os) const;
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// Returns the actual length of the data. WARNING: this can return 0 if no
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// length was specified when setting data of this object.
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const string::size_type getLength() const;
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// Returns 'true' if the data managed by this object is encoded.
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const bool isEncoded() const;
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// Returns the encoding used for the data (or "binary" if not encoded).
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const vmime::encoding& getEncoding() const;
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// Returns 'true' if there is no data set.
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const bool isEmpty() const;
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private:
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// Source of data managed by this content handler
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enum Types
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{
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TYPE_NONE,
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TYPE_STRING,
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TYPE_STREAM
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};
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Types m_type;
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// Equals to NO_ENCODING if data is not encoded, otherwise this
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// specifies the encoding that have been used to encode the data.
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vmime::encoding m_encoding;
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// Used if m_type == TYPE_STRING
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utility::stringProxy m_string;
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// Used if m_type == TYPE_STREAM
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utility::smart_ptr <utility::inputStream> m_ownedStream; // 'contentHandler' objects are copiable...
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utility::inputStream* m_stream;
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string::size_type m_length;
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};
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} // vmime
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#endif // VMIME_CONTENTHANDLER_HPP_INCLUDED
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