129 lines
3.7 KiB
C
129 lines
3.7 KiB
C
/* Test of c32swidth() function.
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Copyright (C) 2023-2024 Free Software Foundation, Inc.
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>. */
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/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
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#include <config.h>
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#include <uchar.h>
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#include "signature.h"
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SIGNATURE_CHECK (c32swidth, int, (const char32_t *, size_t));
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#include <locale.h>
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#include <string.h>
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#include "localcharset.h"
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#include "macros.h"
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int
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main ()
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{
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int w;
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/* Switch to an UTF-8 locale. */
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if (!((setlocale (LC_ALL, "fr_FR.UTF-8") != NULL
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|| setlocale (LC_ALL, "de_DE.UTF-8") != NULL
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|| setlocale (LC_ALL, "es_ES.UTF-8") != NULL
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|| setlocale (LC_ALL, "en_US.UTF-8") != NULL)
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/* Check whether it's really an UTF-8 locale.
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On native Windows, these setlocale calls succeed but the encoding
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of this locale is CP1252, not UTF-8. */
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&& strcmp (locale_charset (), "UTF-8") == 0))
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{
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fprintf (stderr, "Skipping test: No common Unicode locale is installed\n");
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return 77;
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}
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{
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char32_t s[] = { 'f', 'p', 0, 'x' };
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w = c32swidth (s, 0);
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ASSERT (w == 0);
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w = c32swidth (s, 1);
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ASSERT (w == 1);
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w = c32swidth (s, 2);
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ASSERT (w == 2);
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w = c32swidth (s, 3);
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ASSERT (w == 2);
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w = c32swidth (s, 4);
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ASSERT (w == 2);
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w = c32swidth (s, (size_t)(-1));
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ASSERT (w == 2);
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}
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{
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char32_t s[] = { 'f', 'p', '\n', 'x' };
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w = c32swidth (s, 0);
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ASSERT (w == 0);
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w = c32swidth (s, 1);
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ASSERT (w == 1);
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w = c32swidth (s, 2);
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ASSERT (w == 2);
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w = c32swidth (s, 3);
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ASSERT (w == -1);
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w = c32swidth (s, 4);
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ASSERT (w == -1);
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}
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/* Test width of some non-spacing characters. */
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{
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char32_t s[] = { 'a', 0x0301 };
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w = c32swidth (s, 2);
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ASSERT (w == 1);
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}
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/* Test width of some zero width characters. */
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{
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char32_t s[] = { 'i', 0x200B, 'j' };
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w = c32swidth (s, 3);
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ASSERT (w == 2);
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}
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/* Test width of some math symbols.
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U+2202 is marked as having ambiguous width (A) in EastAsianWidth.txt
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(see <https://www.unicode.org/Public/12.0.0/ucd/EastAsianWidth.txt>).
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The Unicode Standard Annex 11
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<https://www.unicode.org/reports/tr11/tr11-36.html>
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says
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"Ambiguous characters behave like wide or narrow characters
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depending on the context (language tag, script identification,
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associated font, source of data, or explicit markup; all can
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provide the context). If the context cannot be established
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reliably, they should be treated as narrow characters by default."
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For c32width(), the only available context information is the locale.
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The chosen locale above is a Western locale, not an East Asian locale,
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therefore U+2202 should be treated like a narrow character. */
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{
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char32_t s[] = { 0x2202 };
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w = c32swidth (s, 1);
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ASSERT (w == 1);
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}
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/* Test width of some CJK characters. */
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{
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char32_t s[] = { 0x4E2D, 0x6587 };
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w = c32swidth (s, 2);
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ASSERT (w == 4);
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}
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{
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char32_t s[] = { 0x20369, 0x2F876 };
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w = c32swidth (s, 2);
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ASSERT (w == 4);
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}
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return test_exit_status;
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}
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