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#include <stdio.h> |
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#include <signal.h> |
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#include "color.h" |
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#include "driver.h" |
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int (*wrnvec)(), (*errvec)(), (*cmdvec)(); /* error vectors, unused */ |
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long nrays = 0; /* fake it */ |
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struct driver *dev = NULL; /* output device */ |
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FILE *devin, *devout; /* communications channels */ |
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int notified = 0; /* notified parent of input? */ |
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char *progname; /* driver name */ |
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int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_mycomin(); |
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int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_flush(); |
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int (*dev_func[NREQUESTS])() = { /* request handlers */ |
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r_clear, r_paintr, |
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r_getcur, r_comout, r_comin |
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r_getcur, r_comout, |
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r_comin, r_flush |
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}; |
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char mybuf[512] = ""; |
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char *mybufp(); |
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main(argc, argv) /* set up communications and main loop */ |
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int argc; |
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char *argv[]; |
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if ((dev = dinit(argv[0], argv[3])) == NULL) |
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quit(1); |
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putw(COM_RECVM, devout); /* verify initialization */ |
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putw(dev->xsiz, devout); |
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putw(dev->ysiz, devout); |
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fflush(devout); |
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/* loop on requests */ |
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while ((com = getc(devin)) != EOF) { |
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COLOR col; |
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int xmin, ymin, xmax, ymax; |
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nrays += 5; /* pretend */ |
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fread(col, sizeof(COLOR), 1, devin); |
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fread((char *)col, sizeof(COLOR), 1, devin); |
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xmin = getw(devin); ymin = getw(devin); |
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xmax = getw(devin); ymax = getw(devin); |
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(*dev->paintr)(col, xmin, ymin, xmax, ymax); |
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/* check for input */ |
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if (!notified && dev->inpready > 0) { |
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notified = 1; |
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kill(getppid(), SIGIO); |
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} |
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} |
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r_flush() /* flush output */ |
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{ |
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if (dev->flush != NULL) |
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(*dev->flush)(); |
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putc(COM_FLUSH, devout); |
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fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout); |
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putw(dev->xsiz, devout); |
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putw(dev->ysiz, devout); |
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putw(dev->inpready, devout); |
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fflush(devout); |
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} |
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r_getcur() /* get and return cursor position */ |
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{ |
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int c; |
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r_comin() /* read string from command line */ |
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{ |
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char buf[256]; |
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char buf[256], *prompt; |
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/* get prompt */ |
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if (getc(devin)) { |
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mygets(buf, devin); |
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prompt = buf; |
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} else |
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prompt = NULL; |
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/* get string */ |
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(*dev->comin)(buf); |
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(*dev->comin)(buf, prompt); |
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/* reply */ |
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putc(COM_COMIN, devout); |
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myputs(buf, devout); |
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putw(dev->inpready, devout); |
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fflush(devout); |
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/* reset notify */ |
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notified = 0; |
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} |
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} |
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r_mycomin() /* get command from my buffer */ |
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{ |
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register char *cp; |
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/* get next command */ |
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for (cp = mybuf; *cp != '\n'; cp++) |
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; |
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*cp++ = '\0'; |
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(*dev->comout)(mybuf); /* echo my command */ |
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/* send it as reply */ |
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putc(COM_COMIN, devout); |
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myputs(mybuf, devout); |
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fflush(devout); |
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/* get next command */ |
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(*dev->comout)("\n"); |
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strcpy(mybuf, cp); |
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if (mybuf[0]) |
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kill(getppid(), SIGIO); /* signal more */ |
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else |
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dev_func[COM_COMIN] = r_comin; /* else reset */ |
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} |
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stderr_v(s) /* put string to stderr */ |
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register char *s; |
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{ |
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fflush(stderr); |
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inline = 0; |
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} |
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} |
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char * |
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mybufp() /* return buffer for my command */ |
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{ |
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if (dev_func[COM_COMIN] != r_mycomin) { |
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dev_func[COM_COMIN] = r_mycomin; |
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kill(getppid(), SIGIO); |
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} |
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return(mybuf+strlen(mybuf)); |
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} |
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repaint(xmin, ymin, xmax, ymax) /* repaint section of display */ |
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int xmin, ymin, xmax, ymax; |
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{ |
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sprintf(mybufp(), "repaint %d %d %d %d\n", |
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xmin, ymin, xmax, ymax); |
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} |
