61 lines
2.4 KiB
C
61 lines
2.4 KiB
C
#pragma once
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// Copyright Digital Mars 2003 - 2009.
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// Authors: Walter Bright, Sean Kelly
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// Boost Software License - Version 1.0 - August 17th, 2003
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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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// 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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// 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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#include <boost/config.hpp>
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#include <stdexcept>
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/*******************************
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* Test if c is a valid UTF-32 character.
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*
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* \uFFFE and \uFFFF are considered valid by this function,
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* as they are permitted for internal use by an application,
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* but they are not allowed for interchange by the Unicode standard.
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*
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* Returns: true if it is, false if not.
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*/
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inline bool isValidChar32(char32_t c) BOOST_NOEXCEPT
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{
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/* Note: FFFE and FFFF are specifically permitted by the
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* Unicode standard for application internal use, but are not
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* allowed for interchange.
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* (thanks to Arcane Jill)
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*/
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return c < 0xD800 ||
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(c > 0xDFFF && c <= 0x10FFFF /*&& c != 0xFFFE && c != 0xFFFF*/);
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}
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/***************
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* Decodes and returns character starting at s[idx]. idx is advanced past the
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* decoded character. If the character is not well formed, an exception is
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* thrown and idx remains unchanged.
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*/
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char32_t decodeUtf8(const char* s, size_t len, size_t& idx);
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