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/**
* mds — A micro-display server
* Copyright © 2014, 2015, 2016, 2017 Mattias Andrée (maandree@kth.se)
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef MDS_MDS_KBDC_STRING_H
#define MDS_MDS_KBDC_STRING_H
#include <stdint.h>
#include <stddef.h>
/**
* Data type for a character in a decoded string
*/
typedef int32_t char32_t;
/**
* Get the length of a string
*
* @param string The string
* @return The length of the string
*/
__attribute__((pure, nonnull))
size_t string_length(const char32_t *restrict string);
/**
* Convert a NUL-terminated UTF-8 string to a -1-terminated UTF-32 string
*
* @param string The UTF-8 string
* @return The string in UTF-32, `NULL` on error
*/
__attribute__((nonnull))
char32_t *string_decode(const char *restrict string);
/**
* Convert a -1-terminated UTF-32 string to a NUL-terminated Modified UTF-8 string
*
* @param string The UTF-32 string
* @return The string in UTF-8, `NULL` on error
*/
__attribute__((nonnull))
char *string_encode(const char32_t *restrict string);
/**
* Create duplicate of a string
*
* @param string The string
* @return A duplicate of the string, `NULL` on error or if `string` is `NULL`
*/
char32_t *string_dup(const char32_t *restrict string);
#endif
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