1: /* Display width functions.
2: Copyright (C) 2001-2002, 2005, 2007, 2009-2019 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 <https://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
30: extern "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. */
40: extern 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. */
46: extern int
47: u8_width (const uint8_t *s, size_t n, const char *encoding)
48: _UC_ATTRIBUTE_PURE;
49: extern int
50: u16_width (const uint16_t *s, size_t n, const char *encoding)
51: _UC_ATTRIBUTE_PURE;
52: extern 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. */
57: extern int
58: u8_strwidth (const uint8_t *s, const char *encoding)
59: _UC_ATTRIBUTE_PURE;
60: extern int
61: u16_strwidth (const uint16_t *s, const char *encoding)
62: _UC_ATTRIBUTE_PURE;
63: extern 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 */
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