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/* Display width functions.
Copyright (C) 2001-2002, 2005, 2007, 2009-2022 Free Software Foundation,
Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file 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 Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
#ifndef _UNIWIDTH_H
#define _UNIWIDTH_H
#include "unitypes.h"
/* Get size_t. */
#include <stddef.h>
/* Get locale_charset() declaration. */
#include <unistring/localcharset.h>
#ifdef __cplusplus
extern "C" {
#endif
/* Display width. */
/* These functions are locale dependent. The encoding argument identifies
the encoding (e.g. "ISO-8859-2" for Polish). */
/* Determine number of column positions required for UC. */
extern int
uc_width (ucs4_t uc, const char *encoding)
_UC_ATTRIBUTE_PURE;
/* Determine number of column positions required for first N units
(or fewer if S ends before this) in S. */
extern int
u8_width (const uint8_t *s, size_t n, const char *encoding)
_UC_ATTRIBUTE_PURE;
extern int
u16_width (const uint16_t *s, size_t n, const char *encoding)
_UC_ATTRIBUTE_PURE;
extern int
u32_width (const uint32_t *s, size_t n, const char *encoding)
_UC_ATTRIBUTE_PURE;
/* Determine number of column positions required for S. */
extern int
u8_strwidth (const uint8_t *s, const char *encoding)
_UC_ATTRIBUTE_PURE;
extern int
u16_strwidth (const uint16_t *s, const char *encoding)
_UC_ATTRIBUTE_PURE;
extern int
u32_strwidth (const uint32_t *s, const char *encoding)
_UC_ATTRIBUTE_PURE;
#ifdef __cplusplus
}
#endif
#endif /* _UNIWIDTH_H */
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