73 lines
2.5 KiB
C++
73 lines
2.5 KiB
C++
// char_t.hh
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// This file is part of libpbe; see http://anyterm.org/
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// (C) 2007-2008 Philip Endecott
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// Distributed under the Boost Software License, Version 1.0:
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//
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// Permission is hereby granted, free of charge, to any person or organization
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// obtaining a copy of the software and accompanying documentation covered by
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// this license (the "Software") to use, reproduce, display, distribute,
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// execute, and transmit the Software, and to prepare derivative works of the
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// Software, and to permit third-parties to whom the Software is furnished to
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// do so, all subject to the following:
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//
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// The copyright notices in the Software and this entire statement, including
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// the above license grant, this restriction and the following disclaimer,
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// must be included in all copies of the Software, in whole or in part, and
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// all derivative works of the Software, unless such copies or derivative
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// works are solely in the form of machine-executable object code generated by
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// a source language processor.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
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// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
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// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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// DEALINGS IN THE SOFTWARE.
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#ifndef libpbe_charset_char_t_hh
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#define libpbe_charset_char_t_hh
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#include <boost/integer.hpp>
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namespace pbe {
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// Defined-size character types
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// ----------------------------
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//
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// The built-in types char and wchar_t have different numbers of bits on
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// different platforms. C++0x will probably have new char types of determined
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// sizes; this file provides three typedefs, char8_t, char16_t and char32_t
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// that do the same sort of thing. These map to char and wchar_t when
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// appropriate, and to an unsigned integer of the appropriate size (using
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// Boost.Integer) otherwise.
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//
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// The specialised template class char_t<N> provides a typedef 'type' for an
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// N-bit character.
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template <int bits>
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struct char_t {
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typedef typename boost::uint_t<bits>::least type;
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};
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template <>
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struct char_t<8*sizeof(char)> {
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typedef char type;
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};
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template <>
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struct char_t<8*sizeof(wchar_t)> {
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typedef wchar_t type;
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};
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typedef char_t<8>::type char8_t;
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typedef char_t<16>::type char16_t;
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typedef char_t<32>::type char32_t;
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};
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#endif
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