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Fix issue 447: Apparently some drivers only emit SANE_STATUS_EOF once, and SANE_STATUS_IO_ERROR after that. The code however assumed that the driver keeps emitting SANE_STATUS_EOF. This commit fixes this.

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This commit is contained in:
Sandro Mani 2014-01-26 00:11:15 +01:00
parent bed2e429dc
commit 8324a9a3e0
1 changed files with 14 additions and 8 deletions
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22
Sane/_sane.c
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@ -916,10 +916,13 @@ SaneDev_snap(SaneDevObject *self, PyObject *args)
call which returns SANE_STATUS_EOF in order to start
a new frame.
*/
do {
st = sane_read(self->h, buffer, READSIZE, &len);
}
while (st == SANE_STATUS_GOOD);
if (st != SANE_STATUS_EOF)
{
do {
st = sane_read(self->h, buffer, READSIZE, &len);
}
while (st == SANE_STATUS_GOOD);
}
if (st != SANE_STATUS_EOF)
{
Py_BLOCK_THREADS
@ -937,10 +940,13 @@ SaneDev_snap(SaneDevObject *self, PyObject *args)
}
}
/* enforce SANE_STATUS_EOF. Can be necessary for ADF scans for some backends */
do {
st = sane_read(self->h, buffer, READSIZE, &len);
}
while (st == SANE_STATUS_GOOD);
if (st != SANE_STATUS_EOF)
{
do {
st = sane_read(self->h, buffer, READSIZE, &len);
}
while (st == SANE_STATUS_GOOD);
}
if (st != SANE_STATUS_EOF)
{
sane_cancel(self->h);