32 |
|
|
33 |
|
char *progname; /* driver name */ |
34 |
|
|
35 |
< |
int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(); |
35 |
> |
int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_mycomin(); |
36 |
|
|
37 |
|
int (*dev_func[NREQUESTS])() = { /* request handlers */ |
38 |
|
r_clear, r_paintr, |
39 |
|
r_getcur, r_comout, r_comin |
40 |
|
}; |
41 |
|
|
42 |
+ |
char mybuf[512] = ""; |
43 |
|
|
44 |
+ |
char *mybufp(); |
45 |
+ |
|
46 |
+ |
|
47 |
|
main(argc, argv) /* set up communications and main loop */ |
48 |
|
int argc; |
49 |
|
char *argv[]; |
111 |
|
xmax = getw(devin); ymax = getw(devin); |
112 |
|
(*dev->paintr)(col, xmin, ymin, xmax, ymax); |
113 |
|
/* check for input */ |
114 |
< |
if (dev->inpready > notified) { |
114 |
> |
if (!notified && dev->inpready > 0) { |
115 |
> |
notified = 1; |
116 |
|
kill(getppid(), SIGIO); |
112 |
– |
notified = dev->inpready; |
117 |
|
} |
118 |
|
} |
119 |
|
|
183 |
|
} |
184 |
|
|
185 |
|
|
186 |
< |
repaint(xmin, ymin, xmax, ymax) /* repaint section of display */ |
183 |
< |
int xmin, ymin, xmax, ymax; |
186 |
> |
r_mycomin() /* get command from my buffer */ |
187 |
|
{ |
188 |
< |
/* no can do! */ |
188 |
> |
register char *cp; |
189 |
> |
/* get next command */ |
190 |
> |
for (cp = mybuf; *cp != '\n'; cp++) |
191 |
> |
; |
192 |
> |
*cp++ = '\0'; |
193 |
> |
(*dev->comout)(mybuf); /* echo my command */ |
194 |
> |
/* send it as reply */ |
195 |
> |
putc(COM_COMIN, devout); |
196 |
> |
myputs(mybuf, devout); |
197 |
> |
fflush(devout); |
198 |
> |
/* get next command */ |
199 |
> |
(*dev->comout)("\n"); |
200 |
> |
strcpy(mybuf, cp); |
201 |
> |
if (mybuf[0]) |
202 |
> |
kill(getppid(), SIGIO); /* signal more */ |
203 |
> |
else |
204 |
> |
dev_func[COM_COMIN] = r_comin; /* else reset */ |
205 |
|
} |
206 |
|
|
207 |
|
|
219 |
|
fflush(stderr); |
220 |
|
inline = 0; |
221 |
|
} |
222 |
+ |
} |
223 |
+ |
|
224 |
+ |
|
225 |
+ |
char * |
226 |
+ |
mybufp() /* return buffer for my command */ |
227 |
+ |
{ |
228 |
+ |
if (dev_func[COM_COMIN] != r_mycomin) { |
229 |
+ |
dev_func[COM_COMIN] = r_mycomin; |
230 |
+ |
kill(getppid(), SIGIO); |
231 |
+ |
} |
232 |
+ |
return(mybuf+strlen(mybuf)); |
233 |
+ |
} |
234 |
+ |
|
235 |
+ |
|
236 |
+ |
repaint(xmin, ymin, xmax, ymax) /* repaint section of display */ |
237 |
+ |
int xmin, ymin, xmax, ymax; |
238 |
+ |
{ |
239 |
+ |
sprintf(mybufp(), "repaint %d %d %d %d\n", |
240 |
+ |
xmin, ymin, xmax, ymax); |
241 |
|
} |