#include "stdio_impl.h"
#include <wchar.h>

wint_t __fgetwc_unlocked(FILE*);

wchar_t* fgetws(wchar_t* restrict s, int n, FILE* restrict f) {
  wchar_t* p = s;

  if (!n--)
    return s;

  FLOCK(f);

  for (; n; n--) {
    wint_t c = __fgetwc_unlocked(f);
    if (c == WEOF)
      break;
    *p++ = c;
    if (c == '\n')
      break;
  }
  *p = 0;
  if (ferror(f))
    p = s;

  FUNLOCK(f);

  return (p == s) ? NULL : s;
}

weak_alias(fgetws, fgetws_unlocked);