71f0ed8b74
This eliminates some overhead, because the compiler doesn't need to consider these functions throwing.
91 lines
2.7 KiB
C++
91 lines
2.7 KiB
C++
/*
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* Copyright (C) 2011-2014 Max Kellermann <max.kellermann@gmail.com>
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* http://www.musicpd.org
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* - Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* - Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
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* OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef UTF8_HXX
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#define UTF8_HXX
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#include "Compiler.h"
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#include <stddef.h>
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/**
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* Is this a valid UTF-8 string?
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*/
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gcc_pure gcc_nonnull_all
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bool
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ValidateUTF8(const char *p) noexcept;
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/**
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* @return the number of the sequence beginning with the given
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* character, or 0 if the character is not a valid start byte
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*/
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gcc_const
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size_t
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SequenceLengthUTF8(char ch) noexcept;
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/**
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* @return the number of the first sequence in the given string, or 0
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* if the sequence is malformed
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*/
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gcc_pure
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size_t
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SequenceLengthUTF8(const char *p) noexcept;
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/**
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* Convert the specified string from ISO-8859-1 to UTF-8.
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*
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* @return the UTF-8 version of the source string; may return #src if
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* there are no non-ASCII characters; returns nullptr if the destination
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* buffer is too small
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*/
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gcc_pure gcc_nonnull_all
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const char *
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Latin1ToUTF8(const char *src, char *buffer, size_t buffer_size) noexcept;
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/**
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* Convert the specified Unicode character to UTF-8 and write it to
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* the buffer. buffer must have a length of at least 6!
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*
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* @return a pointer to the buffer plus the added bytes(s)
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*/
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gcc_nonnull_all
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char *
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UnicodeToUTF8(unsigned ch, char *buffer) noexcept;
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/**
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* Returns the number of characters in the string. This is different
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* from strlen(), which counts the number of bytes.
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*/
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gcc_pure gcc_nonnull_all
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size_t
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LengthUTF8(const char *p) noexcept;
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#endif
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