+/* Search for some characters in UTF-8/UTF-16/UTF-32 string.
+ Copyright (C) 1999, 2002, 2006 Free Software Foundation, Inc.
+ Written by Bruno Haible <bruno@clisp.org>, 2002.
+
+ This program is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Library General Public License as published
+ by the Free Software Foundation; either version 2, 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
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with this program; if not, write to the Free Software
+ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
+ USA. */
+
+size_t
+FUNC (const UNIT *str, const UNIT *accept)
+{
+ /* Optimize two cases. */
+ if (accept[0] == 0)
+ return 0;
+ {
+ ucs4_t uc;
+ int count = U_STRMBTOUC (&uc, accept);
+ if (count >= 0 && accept[count] == 0)
+ {
+ const UNIT *ptr = str;
+ for (; *ptr != 0; ptr += count)
+ if (U_CMP (ptr, accept, count) != 0)
+ break;
+ return ptr - str;
+ }
+ }
+ /* General case. */
+ {
+ const UNIT *ptr = str;
+
+ for (;;)
+ {
+ ucs4_t uc;
+ int count = U_STRMBTOUC (&uc, ptr);
+ if (count == 0)
+ return ptr - str;
+ if (count < 0)
+ break;
+ if (!U_STRCHR (accept, uc))
+ return ptr - str;
+ ptr += count;
+ }
+ return U_STRLEN (str);
+ }
+}