91 lines
2.5 KiB
C++
91 lines
2.5 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_UTILITY_STRINGPROXY_HPP_INCLUDED
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#define VMIME_UTILITY_STRINGPROXY_HPP_INCLUDED
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#include <limits>
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#include "types.hpp"
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#include "utility/stream.hpp"
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namespace vmime {
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namespace utility {
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/** This class is a proxy for the string class. This takes
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* advantage of the COW (copy-on-write) system that might
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* be used in "std::string" implementation.
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*/
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class stringProxy
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{
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public:
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typedef string::size_type size_type;
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typedef string string_type;
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// Consruction
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stringProxy();
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stringProxy(const stringProxy& s);
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stringProxy(const string_type& s, const size_type start = 0, const size_type end = std::numeric_limits <size_type>::max());
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// Assignment
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void set(const string_type& s, const size_type start = 0, const size_type end = std::numeric_limits <size_type>::max());
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void detach();
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stringProxy& operator=(const stringProxy& s);
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stringProxy& operator=(const string_type& s);
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// Extract some portion (or whole) of the string
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// and output it into a stream.
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void extract(outputStream& os, const size_type start = 0, const size_type end = std::numeric_limits <size_type>::max()) const;
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// Return the "virtual" length of the string
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const size_type length() const;
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// Return the boundaries of the "virtual" string
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const size_type start() const;
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const size_type end() const;
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string::const_iterator it_begin() const { return (m_buffer.begin() + m_start); }
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string::const_iterator it_end() const { return (m_buffer.begin() + m_end); }
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private:
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string_type m_buffer;
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size_type m_start;
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size_type m_end;
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};
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std::ostream& operator<<(std::ostream& os, const stringProxy& s);
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outputStream& operator<<(outputStream& os, const stringProxy& s);
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} // utility
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} // vmime
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#endif // VMIME_UTILITY_STRINGPROXY_HPP_INCLUDED
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