Esme Povirk (@madewokherd) commented about dlls/sane.ds/capability.c:
case MSG_SET: twCC = msg_set(pCapability, &val);
if (twCC == TWCC_SUCCESS)FIXME("Partial Stub: XFERCOUNT set to %ld, but ignored\n", val);
if (val==0){// This case is explicitly mentioned in the TWAIN specificationactiveDS.capXferCount = -1;twCC = TWCC_CHECKSTATUS;}else if ((val>0 && val < 32768) || val==(TW_INT32) -1)
This cast doesn't make sense to me. If val is a TW_UINT32, it'll never compare equal to -1. I think maybe you want to cast to (TW_UINT32)?