kc3-lang/gnulib/lib/unicase/ignorable.c

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• Hash : 32a72f45
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  Date : 2023-01-01T01:14:21
  

  maint: run 'make update-copyright'
  

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• lib/unicase/ignorable.c

• /* Test whether a Unicode character is case-ignorable.
     Copyright (C) 2002, 2006-2007, 2009-2023 Free Software Foundation, Inc.
     Written by Bruno Haible <bruno@clisp.org>, 2009.
  
     This file is free software.
     It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
     You can redistribute it and/or modify it under either
       - the terms of the GNU Lesser General Public License as published
         by the Free Software Foundation, either version 3, or (at your
         option) any later version, or
       - the terms of the GNU General Public License as published by the
         Free Software Foundation; either version 2, or (at your option)
         any later version, or
       - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  
     This file 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 and the GNU General Public License
     for more details.
  
     You should have received a copy of the GNU Lesser General Public
     License and of the GNU General Public License along with this
     program.  If not, see <https://www.gnu.org/licenses/>.  */
  
  #include <config.h>
  
  /* Specification.  */
  #include "caseprop.h"
  
  /* Quoting the Unicode standard:
       Definition: A character is defined to be "case-ignorable" if it has the
       value MidLetter {or the value MidNumLet} for the Word_Break property or
       its General_Category is one of Nonspacing_Mark (Mn), Enclosing_Mark (Me),
       Format (Cf), Modifier_Letter (Lm), or Modifier_Symbol (Sk).
     The text marked in braces was added in Unicode 5.1.0, see
     <https://www.unicode.org/versions/Unicode5.1.0/> section "Update of
     Definition of case-ignorable".   */
  /* Since this predicate is only used for the "Before C" and "After C"
     conditions of FINAL_SIGMA, we exclude the "cased" characters here.
     This simplifies the evaluation of the regular expressions
       \p{cased} (\p{case-ignorable})* C
     and
       C (\p{case-ignorable})* \p{cased}
   */
  
  #if 0
  
  #include "unictype.h"
  #include "uniwbrk.h"
  
  bool
  uc_is_case_ignorable (ucs4_t uc)
  {
    int wbp = uc_wordbreak_property (uc);
  
    return (wbp == WBP_MIDLETTER || wbp == WBP_MIDNUMLET
            || uc_is_general_category_withtable (uc, UC_CATEGORY_MASK_Mn
                                                     | UC_CATEGORY_MASK_Me
                                                     | UC_CATEGORY_MASK_Cf
                                                     | UC_CATEGORY_MASK_Lm
                                                     | UC_CATEGORY_MASK_Sk))
           && !uc_is_cased (uc);
  }
  
  #else
  
  #include "unictype/bitmap.h"
  
  /* Define u_casing_property_case_ignorable table.  */
  #include "ignorable.h"
  
  bool
  uc_is_case_ignorable (ucs4_t uc)
  {
    return bitmap_lookup (&u_casing_property_case_ignorable, uc);
  }
  
  #endif
  

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