libunistring: update to Unicode 9.0.0 * lib/gen-uni-tables.c (fill_properties): Recognize Sentence_Terminal and Prepended_Concatenation_Mark. (is_property_default_ignorable_code_point): Exclude U+08E2. (fill_arabicshaping): Allow missing whitespace when parsing; recognize "AFRICAN FEH", "AFRICAN QAF", and "AFRICAN MOON". (output_blocks): Increase the element size of the level1 table to accommodate more blocks. (get_lbp): Recognize ZWJ, E_Base, and E_Modifier characters; Update each class according to the standard. (get_wbp): Recognize ZWJ, E_Base, E_Modifier, Glue_After_Zwj, and E_Base_GAZ characters. (output_gbp_table): Recognize ZWJ, E_Base, E_Modifier, Glue_After_Zwj, and E_Base_GAZ characters. * lib/unictype.in.h (UC_JOINING_GROUP_AFRICAN_FEH, UC_JOINING_GROUP_AFRICAN_QAF, UC_JOINING_GROUP_AFRICAN_MOON): New enum value. * lib/unilbrk/lbrktables.h (LBP_ZWJ, LBP_EB, LBP_EM): New enum value. * lib/unilbrk/lbrktables.c (unilbrk_table): Extend the table with LBP_ZWJ, LBP_EB, and LBP_EM. * lib/uniwbrk.in.h (WBP_ZWJ, WBP_EB, WBP_EM, WBP_GAZ, WBP_EBG): New enum value. * lib/uniwbrk/u-wordbreaks.h: Implement WB3c, WB15, and WB16. * lib/uniwbrk/wbrktable.h (uniwbrk_prop_index): New variable declaration. * lib/uniwbrk/wbrktable.c (uniwbrk_prop_index): New variable. (uniwbrk_table): Implement WB14. * tests/uniwbrk/test-uc-wordbreaks.c (wordbreakproperty_to_string): Check WBP_ZWJ, WBP_EB, WBP_EM, WBP_GAZ, and WBP_EBG. * modules/unigbrk/u{32,16,8}-grapheme-breaks: No longer depend on uc-is-grapheme-break. * modules/unigbrk/uc-grapheme-breaks: New module. * modules/unigbrk/uc-grapheme-breaks-tests: New module. * lib/unigbrk.in.h (GBP_ZWJ, GBP_EB, GBP_EM, GBP_GAZ, GBP_EBG): New enum value. (uc_grapheme_breaks): New function, replacing uc_is_grapheme_break. * lib/unigbrk/u-grapheme-breaks.h: New file. * lib/unigbrk/u{32,16,8}-grapheme-breaks.c: Rewrite using u-grapheme-breaks.h instead of uc_is_grapheme_break. * lib/unigbrk/uc-grapheme-breaks.c: New file. * lib/unigbrk/uc-is-grapheme-break.c: Partially update to TR29 rev 29. * tests/unigbrk/test-uc-gbrk-prop.c (graphemebreakproperty_to_string): Check GBP_ZWJ, GBP_EB, GBP_EM, GBP_GAZ, and GBP_EBG. * tests/unigbrk/test-uc-grapheme-breaks.c: New test. * tests/unigbrk/test-uc-is-grapheme-break.c (graphemebreakproperty_to_string): Check GBP_ZWJ, GBP_EB, GBP_EM, GBP_GAZ, and GBP_EBG. (main): Skip unsupported rules involving 3 or more characters, namely GB10, GB12, and GB13. * lib/uniwidth/width.c (nonspacing_table_data): Update.

/* Grapheme cluster break property function.
   Copyright (C) 2010-2017 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 <https://www.gnu.org/licenses/>.  */

#include <config.h>

/* Specification.  */
#include "unigbrk.h"

#include "gbrkprop.h"

int
uc_graphemeclusterbreak_property (ucs4_t uc)
{
  unsigned int index1 = uc >> gbrkprop_header_0;
  if (index1 < gbrkprop_header_1)
    {
      int lookup1 = unigbrkprop.level1[index1];
      if (lookup1 >= 0)
        {
          unsigned int index2 = (uc >> gbrkprop_header_2) & gbrkprop_header_3;
          int lookup2 = unigbrkprop.level2[lookup1 + index2];
          if (lookup2 >= 0)
            {
              unsigned int index3 = uc & gbrkprop_header_4;
              return unigbrkprop.level3[lookup2 + index3];
            }
        }
    }
  return GBP_OTHER;
}