root/maint/gnulib/lib/unistr/u32-strcspn.c

/* */

DEFINITIONS

1. FUNC

   1 /* Search for some characters in 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 #include <config.h>
  27 
  28 /* Specification.  */
  29 #include "unistr.h"
  30 
  31 #define FUNC u32_strcspn
  32 #define UNIT uint32_t
  33 #define U_STRLEN u32_strlen
  34 #define U_STRCHR u32_strchr
  35 
  36 size_t
  37 FUNC (const UNIT *str, const UNIT *reject)
     /*  */
  38 {
  39   /* Optimize two cases.  */
  40   if (reject[0] == 0)
  41     return U_STRLEN (str);
  42   if (reject[1] == 0)
  43     {
  44       ucs4_t uc = reject[0];
  45       const UNIT *ptr = str;
  46       for (; *ptr != 0; ptr++)
  47         if (*ptr == uc)
  48           break;
  49       return ptr - str;
  50     }
  51   /* General case.  */
  52   {
  53     const UNIT *ptr = str;
  54     for (; *ptr != 0; ptr++)
  55       if (U_STRCHR (reject, *ptr))
  56         break;
  57     return ptr - str;
  58   }
  59 }

/* */