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/* Copyright (c) 1989 Regents of the University of California */ |
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#ifndef lint |
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static char SCCSid[] = "$SunId$ LBL"; |
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static const char RCSid[] = "$Id$"; |
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#endif |
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/* |
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* devmain.c - main for independent drivers. |
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* |
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* Redefine your initialization routine to dinit. |
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* |
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* 10/25/89 |
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*/ |
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#include <stdio.h> |
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#include "copyright.h" |
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#include "standard.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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struct driver *dev = NULL; /* output device */ |
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FILE *devin, *devout; /* communications channels */ |
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/* set up I/O */ |
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progname = argv[0]; |
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if (argc < 3) { |
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stderr_v("arg count\n"); |
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eputs("arg count\n"); |
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quit(1); |
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} |
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devin = fdopen(atoi(argv[1]), "r"); |
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devout = fdopen(atoi(argv[2]), "w"); |
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if (devin == NULL || devout == NULL || getw(devin) != COM_SENDM) { |
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stderr_v("connection failure\n"); |
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eputs("connection failure\n"); |
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quit(1); |
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} |
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/* open device */ |
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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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sendstate(); |
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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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if (com >= NREQUESTS || dev_func[com] == NULL) { |
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stderr_v("invalid request\n"); |
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eputs("invalid request\n"); |
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quit(1); |
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} |
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(*dev_func[com])(); /* process request */ |
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} |
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void |
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quit(code) /* close device and exit */ |
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int code; |
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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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sendstate(); |
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fflush(devout); |
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} |
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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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sendstate(); |
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fflush(devout); |
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} |
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} |
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stderr_v(s) /* put string to stderr */ |
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void |
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eputs(s) /* put string to stderr */ |
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register char *s; |
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{ |
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static int inline = 0; |
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static int midline = 0; |
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if (!inline++) { |
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if (!*s) |
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return; |
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if (!midline++) { |
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fputs(progname, stderr); |
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fputs(": ", stderr); |
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} |
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fputs(s, stderr); |
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if (*s && s[strlen(s)-1] == '\n') { |
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if (s[strlen(s)-1] == '\n') { |
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fflush(stderr); |
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inline = 0; |
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midline = 0; |
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} |
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} |
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sendstate() /* send driver state variables */ |
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{ |
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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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} |
