62 lines
1.6 KiB
C
62 lines
1.6 KiB
C
/* Copyright (C) 1995-2022 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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#include <errno.h>
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/* Parse WCS into tokens separated by characters in DELIM. If WCS is
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NULL, the last string wcstok() was called with is used. */
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wchar_t *
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wcstok (wchar_t *wcs, const wchar_t *delim, wchar_t **save_ptr)
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{
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wchar_t *result;
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if (wcs == NULL)
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{
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if (*save_ptr == NULL)
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{
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__set_errno (EINVAL);
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return NULL;
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}
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else
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wcs = *save_ptr;
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}
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/* Scan leading delimiters. */
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wcs += wcsspn (wcs, delim);
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if (*wcs == L'\0')
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{
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*save_ptr = NULL;
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return NULL;
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}
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/* Find the end of the token. */
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result = wcs;
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wcs = wcspbrk (result, delim);
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if (wcs == NULL)
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/* This token finishes the string. */
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*save_ptr = NULL;
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else
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{
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/* Terminate the token and make *SAVE_PTR point past it. */
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*wcs = L'\0';
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*save_ptr = wcs + 1;
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}
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return result;
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}
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