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Diffstat (limited to 'gnulib-tests/test-wcwidth.c')
| -rw-r--r-- | gnulib-tests/test-wcwidth.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/gnulib-tests/test-wcwidth.c b/gnulib-tests/test-wcwidth.c new file mode 100644 index 0000000..7e522ee --- /dev/null +++ b/gnulib-tests/test-wcwidth.c @@ -0,0 +1,106 @@ +/* Test of wcwidth() function. + Copyright (C) 2007-2022 Free Software Foundation, Inc. + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program 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 General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <https://www.gnu.org/licenses/>. */ + +/* Written by Bruno Haible <bruno@clisp.org>, 2007. */ + +#include <config.h> + +#include <wchar.h> + +#include "signature.h" +SIGNATURE_CHECK (wcwidth, int, (wchar_t)); + +#include <locale.h> +#include <string.h> + +#include "c-ctype.h" +#include "localcharset.h" +#include "macros.h" + +int +main () +{ + wchar_t wc; + +#if !GNULIB_WCHAR_SINGLE_LOCALE +# ifdef C_CTYPE_ASCII + /* Test width of ASCII characters. */ + for (wc = 0x20; wc < 0x7F; wc++) + ASSERT (wcwidth (wc) == 1); +# endif +#endif + + /* Switch to an UTF-8 locale. */ + if (setlocale (LC_ALL, "fr_FR.UTF-8") != NULL + /* Check whether it's really an UTF-8 locale. + On OpenBSD 4.0, the setlocale call succeeds only for the LC_CTYPE + category and therefore returns "C/fr_FR.UTF-8/C/C/C/C", but the + LC_CTYPE category is effectively set to an ASCII LC_CTYPE category; + in particular, locale_charset() returns "ASCII". */ + && strcmp (locale_charset (), "UTF-8") == 0) + { + /* Test width of ASCII characters. */ + for (wc = 0x20; wc < 0x7F; wc++) + ASSERT (wcwidth (wc) == 1); + + /* Test width of some non-spacing characters. */ + ASSERT (wcwidth (0x0301) == 0); + ASSERT (wcwidth (0x05B0) == 0); + + /* Test width of some format control characters. */ + ASSERT (wcwidth (0x200E) <= 0); + ASSERT (wcwidth (0x2060) <= 0); +#if 0 /* wchar_t may be only 16 bits. */ + ASSERT (wcwidth (0xE0001) <= 0); + ASSERT (wcwidth (0xE0044) <= 0); +#endif + + /* Test width of some zero width characters. */ + /* While it is desirable that U+200B, U+200C, U+200D have width 0, + because this makes wcswidth work better on strings that contain these + characters, it is acceptable if an implementation treats these + characters like control characters. */ + ASSERT (wcwidth (0x200B) <= 0); + ASSERT (wcwidth (0xFEFF) <= 0); + + /* Test width of some math symbols. + U+2202 is marked as having ambiguous width (A) in EastAsianWidth.txt + (see <https://www.unicode.org/Public/12.0.0/ucd/EastAsianWidth.txt>). + The Unicode Standard Annex 11 + <https://www.unicode.org/reports/tr11/tr11-36.html> + says + "Ambiguous characters behave like wide or narrow characters + depending on the context (language tag, script identification, + associated font, source of data, or explicit markup; all can + provide the context). If the context cannot be established + reliably, they should be treated as narrow characters by default." + For wcwidth(), the only available context information is the locale. + "fr_FR.UTF-8" is a Western locale, not an East Asian locale, therefore + U+2202 should be treated like a narrow character. */ + ASSERT (wcwidth (0x2202) == 1); + + /* Test width of some CJK characters. */ + ASSERT (wcwidth (0x3000) == 2); + ASSERT (wcwidth (0xB250) == 2); + ASSERT (wcwidth (0xFF1A) == 2); +#if 0 /* wchar_t may be only 16 bits. */ + ASSERT (wcwidth (0x20369) == 2); + ASSERT (wcwidth (0x2F876) == 2); +#endif + } + + return 0; +} |