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/* Advance in a wide string, skipping any of a set of wide characters.
Copyright (C) 1999, 2011-2019 Free Software Foundation, Inc.
Written by Bruno Haible <bruno@clisp.org>, 1999.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
size_t
wcsspn (const wchar_t *wcs, const wchar_t *accept)
{
/* Optimize two cases. */
if (accept[0] == (wchar_t)'\0')
return 0;
if (accept[1] == (wchar_t)'\0')
{
wchar_t wc = accept[0];
const wchar_t *ptr = wcs;
for (; *ptr != (wchar_t)'\0'; ptr++)
{
if (*ptr != wc)
break;
}
return ptr - wcs;
}
/* General case. */
{
const wchar_t *ptr = wcs;
for (; *ptr != (wchar_t)'\0'; ptr++)
{
if (!wcschr (accept, *ptr))
break;
}
return ptr - wcs;
}
}
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