root/maint/gnulib/lib/unistr/u-strpbrk.h

/* */

INCLUDED FROM

DEFINITIONS

1. FUNC

   1 /* Search for some characters in UTF-8/UTF-16/UTF-32 string.
   2    Copyright (C) 1999, 2002, 2006, 2009-2021 Free Software Foundation, Inc.
   3    Written by Bruno Haible <bruno@clisp.org>, 2002.
   4 
   5    This file is free software.
   6    It is dual-licensed under "the GNU LGPLv3+ or the GNU GPLv2+".
   7    You can redistribute it and/or modify it under either
   8      - the terms of the GNU Lesser General Public License as published
   9        by the Free Software Foundation; either version 3, or (at your
  10        option) any later version, or
  11      - the terms of the GNU General Public License as published by the
  12        Free Software Foundation; either version 2, or (at your option)
  13        any later version, or
  14      - the same dual license "the GNU LGPLv3+ or the GNU GPLv2+".
  15 
  16    This file is distributed in the hope that it will be useful,
  17    but WITHOUT ANY WARRANTY; without even the implied warranty of
  18    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19    Lesser General Public License and the GNU General Public License
  20    for more details.
  21 
  22    You should have received a copy of the GNU Lesser General Public
  23    License and of the GNU General Public License along with this
  24    program.  If not, see <https://www.gnu.org/licenses/>.  */
  25 
  26 UNIT *
  27 FUNC (const UNIT *str, const UNIT *accept)
     /*  */
  28 {
  29   /* Optimize two cases.  */
  30   if (accept[0] == 0)
  31     return NULL;
  32   {
  33     ucs4_t uc;
  34     int count = U_STRMBTOUC (&uc, accept);
  35     if (count >= 0 && accept[count] == 0)
  36       return U_STRCHR (str, uc);
  37   }
  38   /* General case.  */
  39   {
  40     const UNIT *ptr = str;
  41 
  42     for (;;)
  43       {
  44         ucs4_t uc;
  45         int count = U_STRMBTOUC (&uc, ptr);
  46         if (count <= 0)
  47           break;
  48         if (U_STRCHR (accept, uc))
  49           return (UNIT *) ptr;
  50         ptr += count;
  51       }
  52     return NULL;
  53   }
  54 }

/* */