zircon/third_party/ulib/musl/src/string/wcsspn.c

#include <wchar.h>

size_t wcsspn(const wchar_t* s, const wchar_t* c) {
  const wchar_t* a;
  for (a = s; *s && wcschr(c, *s); s++)
    ;
  return s - a;
}