Mercurial > gnulib
view lib/unigbrk/u32-grapheme-prev.c @ 17249:e542fd46ad6f
maint: update all copyright year number ranges
Run "make update-copyright". Compare to commit 1602f0a from last year.
Signed-off-by: Eric Blake <eblake@redhat.com>
author | Eric Blake <eblake@redhat.com> |
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date | Tue, 01 Jan 2013 00:50:58 +0000 |
parents | 8250f2777afc |
children | 344018b6e5d7 |
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/* Previous grapheme cluster function. Copyright (C) 2010-2013 Free Software Foundation, Inc. Written by Ben Pfaff <blp@cs.stanford.edu>, 2010. 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/>. */ #include <config.h> /* Specification. */ #include "unigbrk.h" #include "unistr.h" const uint32_t * u32_grapheme_prev (const uint32_t *s, const uint32_t *start) { ucs4_t next; if (s == start) return NULL; u32_prev (&next, s, start); for (s--; s != start; s--) { ucs4_t prev; if (u32_prev (&prev, s, start) == NULL) { /* Ill-formed UTF-32 encoding. */ return start; } if (uc_is_grapheme_break (prev, next)) break; next = prev; } return s; }