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47 lines
1.3 KiB
C
47 lines
1.3 KiB
C
/* Copyright (C) 1995-2024 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <wchar.h>
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#ifdef WCSSPN
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# define wcsspn WCSSPN
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#endif
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/* Return the length of the maximum initial segment
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of WCS which contains only wide-characters in ACCEPT. */
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size_t
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wcsspn (const wchar_t *wcs, const wchar_t *accept)
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{
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const wchar_t *p;
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const wchar_t *a;
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size_t count = 0;
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for (p = wcs; *p != L'\0'; ++p)
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{
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for (a = accept; *a != L'\0'; ++a)
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if (*p == *a)
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break;
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if (*a == L'\0')
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return count;
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else
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++count;
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}
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return count;
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}
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libc_hidden_def (wcsspn)
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