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#include <wchar.h>
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wchar_t *wcstok(wchar_t *restrict s, const wchar_t *restrict sep, wchar_t **restrict p)
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{
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if (!s && !(s = *p)) return NULL;
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s += wcsspn(s, sep);
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if (!*s) return *p = 0;
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*p = s + wcscspn(s, sep);
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if (**p) *(*p)++ = 0;
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else *p = 0;
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return s;
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}
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