rezero()
{
iomove(0);
level = 0;
T_STATE = 0;
T_RULE = -1;
T_CH = -1;
T_POS = 0;
strcpy(T_STR, "");
}
void
rezero(void)
{
iomove(0);
level = 0;
T_STATE = 0;
T_RULE = -1;
T_CH = -1;
T_POS = 0;
strlcpy(T_STR, "", sizeof T_STR);
}
/*
* write checks to make sure that the data set is not reading,
* and that it is ready. Then the record is copied
* and transmission started.
*/
dpwrite()
{
register char *bp;
if (u.u_count==0 || dpwait())
return;
dp11.dp_state = WRITE;
bp = dp11.dp_buf->b_addr;
dp11.dp_bufp = bp;
if (u.u_count>512)
u.u_count = 512;
dp11.dp_nxmit = u.u_count;
iomove(dp11.dp_buf, 0, u.u_count, B_WRITE);
dpstart();
}
/*
* Read waits until:
* there is loss of "data set ready", or
* a timeout occurs, or
* a full record has been received.
* The former two result in an error.
*/
dpread()
{
register char *bp, **epp;
bp = dp11.dp_buf->b_addr;
epp = &dp11.dp_bufp;
for(;;) {
if(dpwait())
return;
if (*epp > bp)
break;
spl6();
if (dp11.dp_timer <= 1) {
spl0();
return;
}
sleep(&dp11, DPPRI);
spl0();
}
iomove(dp11.dp_buf, 0, min(u.u_count, *epp-bp), B_READ);
}
