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/*
* Copyright 2011-2019 Max Kellermann <max.kellermann@gmail.com>
* http://www.musicpd.org
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the
* distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
* FOUNDATION OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
* OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifndef UTF8_HXX
#define UTF8_HXX
#include "Compiler.h"
#include <cstddef>
/**
* Is this a valid UTF-8 string?
*/
gcc_pure gcc_nonnull_all
bool
ValidateUTF8(const char *p) noexcept;
/**
* @return the number of the sequence beginning with the given
* character, or 0 if the character is not a valid start byte
*/
gcc_const
size_t
SequenceLengthUTF8(char ch) noexcept;
/**
* @return the number of the first sequence in the given string, or 0
* if the sequence is malformed
*/
gcc_pure
size_t
SequenceLengthUTF8(const char *p) noexcept;
/**
* Convert the specified string from ISO-8859-1 to UTF-8.
*
* @return the UTF-8 version of the source string; may return #src if
* there are no non-ASCII characters; returns nullptr if the destination
* buffer is too small
*/
gcc_pure gcc_nonnull_all
const char *
Latin1ToUTF8(const char *src, char *buffer, size_t buffer_size) noexcept;
/**
* Convert the specified Unicode character to UTF-8 and write it to
* the buffer. buffer must have a length of at least 6!
*
* @return a pointer to the buffer plus the added bytes(s)
*/
gcc_nonnull_all
char *
UnicodeToUTF8(unsigned ch, char *buffer) noexcept;
/**
* Returns the number of characters in the string. This is different
* from strlen(), which counts the number of bytes.
*/
gcc_pure gcc_nonnull_all
size_t
LengthUTF8(const char *p) noexcept;
#endif
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