1 /* Previous grapheme cluster function.
2 Copyright (C) 2010-2021 Free Software Foundation, Inc.
3 Written by Ben Pfaff <blp@cs.stanford.edu>, 2010.
5 This program is free software: you can redistribute it and/or modify it
6 under the terms of the GNU Lesser General Public License as published
7 by the Free Software Foundation; either version 3 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 Lesser General Public License for more details.
15 You should have received a copy of the GNU Lesser General Public License
16 along with this program. If not, see <https://www.gnu.org/licenses/>. */
26 u32_grapheme_prev (const uint32_t *s
, const uint32_t *start
)
33 u32_prev (&next
, s
, start
);
34 for (s
--; s
!= start
; s
--)
38 if (u32_prev (&prev
, s
, start
) == NULL
)
40 /* Ill-formed UTF-32 encoding. */
44 if (uc_is_grapheme_break (prev
, next
))