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diff --git a/lib/uniwbrk/u-wordbreaks.h b/lib/uniwbrk/u-wordbreaks.h
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+/* Word breaks in UTF-8/UTF-16/UTF-32 strings.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2009.
+
+ 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/>. */
+
+void
+FUNC (const UNIT *s, size_t n, char *p)
+{
+ if (n > 0)
+ {
+ const UNIT *s_end = s + n;
+
+ /* Word break property of the last character.
+ -1 at the very beginning of the string. */
+ int last_char_prop = -1;
+
+ /* Format and Extend characters are ignored; this means, the mostly used
+ unit is the complex character (= character with subsequent ignored
+ characters).
+ Word break property of the last complex character.
+ -1 at the very beginning of the string. */
+ int last_compchar_prop = -1;
+ char *last_compchar_ptr = NULL;
+
+ /* For recognizing rules involving 3 complex characters:
+ Word break property of the second-to-last complex character.
+ -1 at the very beginning of the string. */
+ int secondlast_compchar_prop = -1;
+
+ /* Don't break inside multibyte characters. */
+ memset (p, 0, n);
+
+ while (s < s_end)
+ {
+ ucs4_t uc;
+ int count = U_MBTOUC_UNSAFE (&uc, s, s_end - s);
+ int prop = uc_wordbreak_property (uc);
+
+ /* No break at the start of the string. */
+ if (last_char_prop >= 0)
+ {
+ /* No break between CR and LF. */
+ if (last_char_prop == WBP_CR && prop == WBP_LF)
+ /* *p = 0 */;
+ /* Break before and after newlines. */
+ else if (last_char_prop >= WBP_NEWLINE
+ /* same as:
+ last_char_prop == WBP_CR
+ || last_char_prop == WBP_LF
+ || last_char_prop == WBP_NEWLINE */
+ || prop >= WBP_NEWLINE
+ /* same as:
+ prop == WBP_CR
+ || prop == WBP_LF
+ || prop == WBP_NEWLINE */)
+ *p = 1;
+ /* Ignore Format and Extend characters. */
+ else if (!(prop == WBP_EXTEND || prop == WBP_FORMAT))
+ {
+ /* No break in these situations (see UAX #29):
+
+ secondlast last current
+
+ ALetter (MidLetter | MidNumLet) × ALetter (WB7)
+ ALetter × (MidLetter | MidNumLet) ALetter (WB6)
+ Numeric (MidNum | MidNumLet) × Numeric (WB11)
+ Numeric × (MidNum | MidNumLet) Numeric (WB12)
+ ALetter × ALetter (WB5)
+ ALetter × Numeric (WB9)
+ Numeric × ALetter (WB10)
+ Numeric × Numeric (WB8)
+ Katakana × Katakana (WB13)
+ (ALetter | Numeric | Katakana) × ExtendNumLet (WB13a)
+ ExtendNumLet × ExtendNumLet (WB13a)
+ ExtendNumLet × (ALetter | Numeric | Katakana) (WB13b)
+ */
+ /* No break across certain punctuation. Also, disable word
+ breaks that were recognized earlier (due to lookahead of
+ only one complex character). */
+ if ((prop == WBP_ALETTER
+ && (last_compchar_prop == WBP_MIDLETTER
+ || last_compchar_prop == WBP_MIDNUMLET)
+ && secondlast_compchar_prop == WBP_ALETTER)
+ || (prop == WBP_NUMERIC
+ && (last_compchar_prop == WBP_MIDNUM
+ || last_compchar_prop == WBP_MIDNUMLET)
+ && secondlast_compchar_prop == WBP_NUMERIC))
+ {
+ *last_compchar_ptr = 0;
+ /* *p = 0; */
+ }
+ else
+ {
+ /* Perform a single table lookup. */
+ if (uniwbrk_table[last_compchar_prop][prop])
+ *p = 1;
+ /* else *p = 0; */
+ }
+ }
+ }
+
+ last_char_prop = prop;
+ /* Ignore Format and Extend characters, except at the start of the string. */
+ if (last_compchar_prop < 0 || !(prop == WBP_EXTEND || prop == WBP_FORMAT))
+ {
+ secondlast_compchar_prop = last_compchar_prop;
+ last_compchar_prop = prop;
+ last_compchar_ptr = p;
+ }
+
+ s += count;
+ p += count;
+ }
+ }
+}