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authorManuel A. Fernandez Montecelo <manuel.montezelo@gmail.com>2016-05-26 16:48:15 +0100
committerManuel A. Fernandez Montecelo <manuel.montezelo@gmail.com>2016-05-26 16:48:15 +0100
commit5f2b09982312c98863eb9a8dfe2c608b81f58259 (patch)
treee5d38581c2f36e1cca02efedd2d85044d77f76f9 /tests/unigbrk/test-u16-grapheme-prev.c
parent3e0814cd9862b89c7a39672672937477bd87ddfb (diff)
Imported Upstream version 0.9.6upstream/0.9.6
Diffstat (limited to 'tests/unigbrk/test-u16-grapheme-prev.c')
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diff --git a/tests/unigbrk/test-u16-grapheme-prev.c b/tests/unigbrk/test-u16-grapheme-prev.c
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+/* Previous grapheme cluster test.
+ Copyright (C) 2010-2015 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify it
+ under the terms of the GNU Lesser 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Ben Pfaff <blp@cs.stanford.edu>, 2010. */
+
+#include <config.h>
+
+/* Specification. */
+#include <unigbrk.h>
+
+#include <stdio.h>
+#include <stdarg.h>
+#include <stdlib.h>
+
+#include "macros.h"
+
+static void
+test_u16_grapheme_prev (size_t len, ...)
+{
+ const uint16_t *prev;
+ const uint16_t *end;
+ uint16_t s[16];
+ va_list args;
+ size_t n;
+
+ va_start (args, len);
+ n = 0;
+ for (;;)
+ {
+ int unit = va_arg (args, int);
+ if (unit == -1)
+ break;
+ else if (n >= sizeof s / sizeof *s)
+ abort ();
+
+ s[n++] = unit;
+ }
+ va_end (args);
+
+ end = s + n;
+ prev = u16_grapheme_prev (end, s);
+ if (prev != end - len)
+ {
+ size_t i;
+
+ if (prev == NULL)
+ fputs ("u16_grapheme_prev returned NULL", stderr);
+ else
+ fprintf (stderr, "u16_grapheme_prev skipped %zu units", end - prev);
+ fprintf (stderr, ", expected %zu:\n", len);
+ for (i = 0; i < n; i++)
+ fprintf (stderr, " %04x", s[i]);
+ putc ('\n', stderr);
+ abort ();
+ }
+}
+
+int
+main (void)
+{
+ static const uint16_t s[] = { 'a', 'b', 'c' };
+
+ /* Empty string. */
+ ASSERT (u16_grapheme_prev (NULL, NULL) == NULL);
+ ASSERT (u16_grapheme_prev (s, s) == NULL);
+
+ /* Standalone 1-unit graphemes. */
+ test_u16_grapheme_prev (1, 'a', -1);
+ test_u16_grapheme_prev (1, 'a', 'b', -1);
+ test_u16_grapheme_prev (1, 'a', 'b', 'c', -1);
+
+ /* Multi-unit, single code point graphemes. */
+#define HIRAGANA_A 0x3042 /* あ: Hiragana letter 'a'. */
+ test_u16_grapheme_prev (1, HIRAGANA_A, -1);
+ test_u16_grapheme_prev (1, HIRAGANA_A, 'x', -1);
+ test_u16_grapheme_prev (1, HIRAGANA_A, HIRAGANA_A, -1);
+
+ /* Combining accents. */
+#define GRAVE 0x0300 /* Combining grave accent. */
+#define ACUTE 0x0301 /* Combining acute accent. */
+ test_u16_grapheme_prev (2, 'e', ACUTE, -1);
+ test_u16_grapheme_prev (3, 'e', ACUTE, GRAVE, -1);
+ test_u16_grapheme_prev (1, 'e', ACUTE, 'x', -1);
+ test_u16_grapheme_prev (2, 'e', ACUTE, 'e', ACUTE, -1);
+
+ /* Surrogate pairs. */
+ test_u16_grapheme_prev (2, 0xd83d, 0xde10, -1); /* 😐: neutral face. */
+ test_u16_grapheme_prev (3, 0xd83d, 0xde10, GRAVE, -1);
+
+ return 0;
+}