1/* Display width functions.
2   Copyright (C) 2001-2002, 2005, 2007, 2009-2012 Free Software Foundation,
3   Inc.
4
5   This program is free software: you can redistribute it and/or modify it
6   under the terms of the GNU General Public License as published
7   by the Free Software Foundation; either version 3 of the License, or
8   (at your option) any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13   General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
17
18#ifndef _UNIWIDTH_H
19#define _UNIWIDTH_H
20
21#include "unitypes.h"
22
23/* Get size_t.  */
24#include <stddef.h>
25
26/* Get locale_charset() declaration.  */
27#include "localcharset.h"
28
29#ifdef __cplusplus
30extern "C" {
31#endif
32
33
34/* Display width.  */
35
36/* These functions are locale dependent.  The encoding argument identifies
37   the encoding (e.g. "ISO-8859-2" for Polish).  */
38
39/* Determine number of column positions required for UC.  */
40extern int
41       uc_width (ucs4_t uc, const char *encoding)
42       _UC_ATTRIBUTE_PURE;
43
44/* Determine number of column positions required for first N units
45   (or fewer if S ends before this) in S.  */
46extern int
47       u8_width (const uint8_t *s, size_t n, const char *encoding)
48       _UC_ATTRIBUTE_PURE;
49extern int
50       u16_width (const uint16_t *s, size_t n, const char *encoding)
51       _UC_ATTRIBUTE_PURE;
52extern int
53       u32_width (const uint32_t *s, size_t n, const char *encoding)
54       _UC_ATTRIBUTE_PURE;
55
56/* Determine number of column positions required for S.  */
57extern int
58       u8_strwidth (const uint8_t *s, const char *encoding)
59       _UC_ATTRIBUTE_PURE;
60extern int
61       u16_strwidth (const uint16_t *s, const char *encoding)
62       _UC_ATTRIBUTE_PURE;
63extern int
64       u32_strwidth (const uint32_t *s, const char *encoding)
65       _UC_ATTRIBUTE_PURE;
66
67
68#ifdef __cplusplus
69}
70#endif
71
72#endif /* _UNIWIDTH_H */
73