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#include <wchar.h>
size_t wcsspn(const wchar_t * s1, const wchar_t * s2)
{
size_t i;
for (i = 0; s1[i] != L'\0'; i++) {
if (wcschr(s2, s1[i]) == NULL) {
return i;
}
}
return 0;
}
/*
STDC(199409)
*/
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