PRUS_MORETOCOME
(resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
(resid > 0 && space > 0) ? PRUS_MORETOCOME : 0;
((flags & PRUS_MORETOCOME) == 0)
if (flags & PRUS_MORETOCOME)
if (flags & PRUS_MORETOCOME)
((flags & PRUS_MORETOCOME) == 0)
(resid > 0 && space > 0) ? PRUS_MORETOCOME : 0,
!(flags & PRUS_MORETOCOME))