static tb_wchar_t* tb_printf_string(tb_wchar_t* pb, tb_wchar_t* pe, tb_printf_entry_t e, tb_wchar_t const* s)
{
if (s)
{
tb_int_t n = tb_wcsnlen(s, e.precision);
// fill space at left side, e.g. " abcd"
if (!(e.flags & TB_PRINTF_FLAG_LEFT))
{
while (n < e.width--)
if (pb < pe) *pb++ = L' ';
}
// copy string
tb_int_t i = 0;
for (i = 0; i < n; ++i)
if (pb < pe) *pb++ = *s++;
// fill space at right side, e.g. "abcd "
while (n < e.width--)
if (pb < pe) *pb++ = L' ';
}
else
{
// null
if (pb < pe) *pb++ = L'n';
if (pb < pe) *pb++ = L'u';
if (pb < pe) *pb++ = L'l';
if (pb < pe) *pb++ = L'l';
}
return pb;
}
static tb_void_t tb_test_wcsnlen(tb_wchar_t const* s, tb_size_t size)
{
__tb_volatile__ tb_long_t n = 1000000;
__tb_volatile__ tb_long_t r = 0;
tb_hong_t t = tb_mclock();
while (n--)
{
r = tb_wcsnlen(s, size);
}
t = tb_mclock() - t;
tb_wprintf(L"%lld ms, tb_test_wcsnlen(%s, %ld) = %d\n", t, s, size, r);
}
