int
wsemul_sun_output_lowchars(struct wsemul_sun_emuldata *edp,
struct wsemul_inputstate *instate, int kernel)
{
u_int n;
int rc = 0;
switch (instate->inchar) {
case ASCII_NUL:
default:
/* ignore */
break;
case ASCII_BEL: /* "Bell (BEL)" */
wsdisplay_emulbell(edp->cbcookie);
break;
case ASCII_BS: /* "Backspace (BS)" */
if (edp->ccol > 0)
edp->ccol--;
break;
case ASCII_CR: /* "Return (CR)" */
edp->ccol = 0;
break;
case ASCII_HT: /* "Tab (TAB)" */
n = min(8 - (edp->ccol & 7), COLS_LEFT);
if (n != 0) {
WSEMULOP(rc, edp, &edp->abortstate, erasecols,
(edp->emulcookie, edp->crow, edp->ccol, n,
kernel ? edp->kernattr : edp->bkgdattr));
if (rc != 0)
break;
edp->ccol += n;
}
break;
case ASCII_FF: /* "Form Feed (FF)" */
WSEMULOP(rc, edp, &edp->abortstate, eraserows,
(edp->emulcookie, 0, edp->nrows, edp->bkgdattr));
if (rc != 0)
break;
edp->ccol = edp->crow = 0;
break;
case ASCII_VT: /* "Reverse Line Feed" */
if (edp->crow > 0)
edp->crow--;
break;
case ASCII_ESC: /* "Escape (ESC)" */
if (kernel) {
printf("wsemul_sun_output_lowchars: ESC in kernel "
"output ignored\n");
break; /* ignore the ESC */
}
edp->state = SUN_EMUL_STATE_HAVEESC;
break;
case ASCII_LF: /* "Line Feed (LF)" */
/* if the cur line isn't the last, incr and leave. */
if (ROWS_LEFT > 0)
edp->crow++;
else {
rc = wsemul_sun_scrollup(edp, edp->scrolldist);
if (rc != 0)
break;
}
break;
}
return rc;
}
u_int
wsemul_dumb_output(void *cookie, const u_char *data, u_int count, int kernel)
{
struct wsemul_dumb_emuldata *edp = cookie;
u_int processed = 0;
u_char c;
int n;
int rc = 0;
if (edp->crippled) {
while (count-- > 0) {
wsemul_resume_abort(&edp->abortstate);
c = *data++;
if (c == ASCII_BEL)
wsdisplay_emulbell(edp->cbcookie);
else {
WSEMULOP(rc, edp, &edp->abortstate, putchar,
(edp->emulcookie, 0, 0, c, 0));
if (rc != 0)
break;
}
processed++;
}
if (rc != 0)
wsemul_abort_other(&edp->abortstate);
return processed;
}
switch (edp->abortstate.state) {
case ABORT_FAILED_CURSOR:
/*
* If we could not display the cursor back, we pretended not
* having been able to display the last character. But this
* is a lie, so compensate here.
*/
data++, count--;
processed++;
wsemul_reset_abortstate(&edp->abortstate);
break;
case ABORT_OK:
/* remove cursor image */
rc = (*edp->emulops->cursor)
(edp->emulcookie, 0, edp->crow, edp->ccol);
if (rc != 0)
return 0;
break;
default:
break;
}
while (count-- > 0) {
wsemul_resume_abort(&edp->abortstate);
c = *data++;
switch (c) {
case ASCII_BEL:
wsdisplay_emulbell(edp->cbcookie);
break;
case ASCII_BS:
if (edp->ccol > 0)
edp->ccol--;
break;
case ASCII_CR:
edp->ccol = 0;
break;
case ASCII_HT:
n = min(8 - (edp->ccol & 7),
edp->ncols - edp->ccol - 1);
WSEMULOP(rc, edp, &edp->abortstate, erasecols,
(edp->emulcookie, edp->crow, edp->ccol, n,
edp->defattr));
if (rc != 0)
break;
edp->ccol += n;
break;
case ASCII_FF:
WSEMULOP(rc, edp, &edp->abortstate, eraserows,
(edp->emulcookie, 0, edp->nrows, edp->defattr));
if (rc != 0)
break;
edp->ccol = 0;
edp->crow = 0;
break;
case ASCII_VT:
if (edp->crow > 0)
edp->crow--;
break;
default:
WSEMULOP(rc, edp, &edp->abortstate, putchar,
(edp->emulcookie, edp->crow, edp->ccol, c,
edp->defattr));
if (rc != 0)
break;
edp->ccol++;
/* if cur col is still on cur line, done. */
if (edp->ccol < edp->ncols)
break;
/* wrap the column around. */
edp->ccol = 0;
/* FALLTHROUGH */
case ASCII_LF:
/* if the cur line isn't the last, incr and leave. */
if (edp->crow < edp->nrows - 1) {
edp->crow++;
break;
}
n = 1; /* number of lines to scroll */
WSEMULOP(rc, edp, &edp->abortstate, copyrows,
(edp->emulcookie, n, 0, edp->nrows - n));
if (rc == 0)
WSEMULOP(rc, edp, &edp->abortstate, eraserows,
(edp->emulcookie, edp->nrows - n, n,
edp->defattr));
if (rc != 0) {
/* undo wrap-at-eol processing if necessary */
if (c != ASCII_LF)
edp->ccol = edp->ncols - 1;
break;
}
edp->crow -= n - 1;
break;
}
if (rc != 0)
break;
processed++;
}
if (rc != 0)
wsemul_abort_other(&edp->abortstate);
else {
/* put cursor image back */
rc = (*edp->emulops->cursor)
(edp->emulcookie, 1, edp->crow, edp->ccol);
if (rc != 0) {
/*
* Fail the last character output, remembering that
* only the cursor operation really needs to be done.
*/
wsemul_abort_cursor(&edp->abortstate);
processed--;
}
}
if (rc == 0)
wsemul_reset_abortstate(&edp->abortstate);
return processed;
}
