| 1 | /* Determine the number of screen columns needed for a character.
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| 2 | Copyright (C) 2006 Free Software Foundation, Inc.
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| 3 |
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| 4 | This program is free software; you can redistribute it and/or modify
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| 5 | it under the terms of the GNU General Public License as published by
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| 6 | the Free Software Foundation; either version 2, or (at your option)
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| 7 | any later version.
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| 8 |
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| 9 | This program is distributed in the hope that it will be useful,
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| 10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 12 | GNU General Public License for more details.
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| 13 |
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| 14 | You should have received a copy of the GNU General Public License
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| 15 | along with this program; if not, write to the Free Software Foundation,
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| 16 | Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
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| 17 |
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| 18 | #ifndef _gl_WCWIDTH_H
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| 19 | #define _gl_WCWIDTH_H
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| 20 |
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| 21 | #if HAVE_WCHAR_T
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| 22 |
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| 23 | /* Get wcwidth if available, along with wchar_t. */
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| 24 | # if HAVE_WCHAR_H
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| 25 | /* Tru64 with Desktop Toolkit C has a bug: <stdio.h> must be included before
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| 26 | <wchar.h>.
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| 27 | BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
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| 28 | <wchar.h>. */
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| 29 | # include <stdio.h>
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| 30 | # include <time.h>
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| 31 | # include <wchar.h>
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| 32 | # endif
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| 33 |
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| 34 | /* Get iswprint. */
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| 35 | # if HAVE_WCTYPE_H
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| 36 | # include <wctype.h>
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| 37 | # endif
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| 38 | # if !defined iswprint && !HAVE_ISWPRINT
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| 39 | static inline int
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| 40 | iswprint (wint_t wc)
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| 41 | {
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| 42 | return (wc >= 0 && wc < 128
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| 43 | ? wc >= ' ' && wc <= '~'
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| 44 | : 1);
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| 45 | }
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| 46 | # define iswprint iswprint
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| 47 | # endif
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| 48 |
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| 49 | # ifndef HAVE_DECL_WCWIDTH
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| 50 | "this configure-time declaration test was not run"
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| 51 | # endif
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| 52 | # ifndef wcwidth
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| 53 | # if !HAVE_WCWIDTH
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| 54 |
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| 55 | /* wcwidth doesn't exist, so assume all printable characters have
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| 56 | width 1. */
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| 57 | static inline int
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| 58 | wcwidth (wchar_t wc)
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| 59 | {
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| 60 | return wc == 0 ? 0 : iswprint (wc) ? 1 : -1;
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| 61 | }
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| 62 |
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| 63 | # elif !HAVE_DECL_WCWIDTH
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| 64 |
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| 65 | /* wcwidth exists but is not declared. */
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| 66 | extern
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| 67 | # ifdef __cplusplus
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| 68 | "C"
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| 69 | # endif
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| 70 | int wcwidth (int /* actually wchar_t */);
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| 71 |
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| 72 | # endif
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| 73 | # endif
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| 74 |
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| 75 | #endif /* HAVE_WCHAR_H */
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| 76 |
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| 77 | #endif /* _gl_WCWIDTH_H */
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