1 /* Previous grapheme cluster test.
2 Copyright (C) 2010-2014 Free Software Foundation, Inc.
4 This program is free software: you can redistribute it and/or modify it
5 under the terms of the GNU Lesser General Public License as published
6 by the Free Software Foundation; either version 3 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 Lesser General Public License for more details.
14 You should have received a copy of the GNU Lesser General Public License
15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
17 /* Written by Ben Pfaff <blp@cs.stanford.edu>, 2010. */
31 test_u32_grapheme_prev (size_t len, ...)
43 int unit = va_arg (args, int);
46 else if (n >= sizeof s / sizeof *s)
54 prev = u32_grapheme_prev (end, s);
55 if (prev != end - len)
60 fputs ("u32_grapheme_prev returned NULL", stderr);
62 fprintf (stderr, "u32_grapheme_prev skipped %zu units", end - prev);
63 fprintf (stderr, ", expected %zu:\n", len);
64 for (i = 0; i < n; i++)
65 fprintf (stderr, " %04x", s[i]);
74 static const uint32_t s[] = { 'a', 'b', 'c' };
77 ASSERT (u32_grapheme_prev (NULL, NULL) == NULL);
78 ASSERT (u32_grapheme_prev (s, s) == NULL);
80 /* Standalone 1-unit graphemes. */
81 test_u32_grapheme_prev (1, 'a', -1);
82 test_u32_grapheme_prev (1, 'a', 'b', -1);
83 test_u32_grapheme_prev (1, 'a', 'b', 'c', -1);
85 /* Multi-unit, single code point graphemes. */
86 #define HIRAGANA_A 0x3042 /* あ: Hiragana letter 'a'. */
87 test_u32_grapheme_prev (1, HIRAGANA_A, -1);
88 test_u32_grapheme_prev (1, HIRAGANA_A, 'x', -1);
89 test_u32_grapheme_prev (1, HIRAGANA_A, HIRAGANA_A, -1);
91 /* Combining accents. */
92 #define GRAVE 0x0300 /* Combining grave accent. */
93 #define ACUTE 0x0301 /* Combining acute accent. */
94 test_u32_grapheme_prev (2, 'e', ACUTE, -1);
95 test_u32_grapheme_prev (3, 'e', ACUTE, GRAVE, -1);
96 test_u32_grapheme_prev (1, 'e', ACUTE, 'x', -1);
97 test_u32_grapheme_prev (2, 'e', ACUTE, 'e', ACUTE, -1);
100 #define NEUTRAL_FACE 0x1f610 /* 😐: neutral face. */
101 test_u32_grapheme_prev (1, NEUTRAL_FACE, -1);
102 test_u32_grapheme_prev (2, NEUTRAL_FACE, GRAVE, -1);