| 1 | /* Display width functions.
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| 2 | Copyright (C) 2001-2002, 2005, 2007, 2009-2021 Free Software Foundation,
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| 3 | Inc.
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| 4 |
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| 5 | This file is free software: you can redistribute it and/or modify
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| 6 | it under the terms of the GNU Lesser General Public License as
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| 7 | published by the Free Software Foundation; either version 2.1 of the
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| 8 | License, or (at your option) any later version.
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| 9 |
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| 10 | This file is distributed in the hope that it will be useful,
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 13 | GNU Lesser General Public License for more details.
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| 14 |
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| 15 | You should have received a copy of the GNU Lesser General Public License
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| 16 | along with this program. If not, see <https://www.gnu.org/licenses/>. */
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| 17 |
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| 18 | #ifndef _UNIWIDTH_H
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| 19 | #define _UNIWIDTH_H
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| 20 |
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| 21 | #include "unitypes.h"
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| 22 |
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| 23 | /* Get size_t. */
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| 24 | #include <stddef.h>
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| 25 |
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| 26 | /* Get locale_charset() declaration. */
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| 27 | #include "localcharset.h"
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| 28 |
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| 29 | #ifdef __cplusplus
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| 30 | extern "C" {
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| 31 | #endif
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| 32 |
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| 33 |
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| 34 | /* Display width. */
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| 35 |
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| 36 | /* These functions are locale dependent. The encoding argument identifies
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| 37 | the encoding (e.g. "ISO-8859-2" for Polish). */
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| 38 |
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| 39 | /* Determine number of column positions required for UC. */
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| 40 | extern int
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| 41 | uc_width (ucs4_t uc, const char *encoding)
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| 42 | _UC_ATTRIBUTE_PURE;
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| 43 |
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| 44 | /* Determine number of column positions required for first N units
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| 45 | (or fewer if S ends before this) in S. */
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| 46 | extern int
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| 47 | u8_width (const uint8_t *s, size_t n, const char *encoding)
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| 48 | _UC_ATTRIBUTE_PURE;
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| 49 | extern int
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| 50 | u16_width (const uint16_t *s, size_t n, const char *encoding)
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| 51 | _UC_ATTRIBUTE_PURE;
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| 52 | extern int
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| 53 | u32_width (const uint32_t *s, size_t n, const char *encoding)
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| 54 | _UC_ATTRIBUTE_PURE;
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| 55 |
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| 56 | /* Determine number of column positions required for S. */
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| 57 | extern int
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| 58 | u8_strwidth (const uint8_t *s, const char *encoding)
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| 59 | _UC_ATTRIBUTE_PURE;
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| 60 | extern int
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| 61 | u16_strwidth (const uint16_t *s, const char *encoding)
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| 62 | _UC_ATTRIBUTE_PURE;
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| 63 | extern int
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| 64 | u32_strwidth (const uint32_t *s, const char *encoding)
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| 65 | _UC_ATTRIBUTE_PURE;
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| 66 |
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| 67 |
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| 68 | #ifdef __cplusplus
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| 69 | }
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| 70 | #endif
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| 71 |
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| 72 | #endif /* _UNIWIDTH_H */
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