src/rt/devmain.c

/* Copyright (c) 1989 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "$SunId$ LBL";
#endif

/*
 *  devmain.c - main for independent drivers.
 *
 *      Redefine your initialization routine to dinit.
 *
 *      10/25/89
 */

#include <stdio.h>

#include <signal.h>

#include "color.h"

#include "driver.h"

int     (*wrnvec)(), (*errvec)(), (*cmdvec)();  /* error vectors, unused */

long    nrays = 0;                              /* fake it */

struct driver   *dev = NULL;                    /* output device */

FILE    *devin, *devout;                        /* communications channels */

int     notified = 0;                           /* notified parent of input? */

char    *progname;                              /* driver name */

int     r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin();

int     (*dev_func[NREQUESTS])() = {            /* request handlers */
                r_clear, r_paintr,
                r_getcur, r_comout, r_comin
        };


main(argc, argv)                /* set up communications and main loop */
int     argc;
char    *argv[];
{
        extern struct driver    *dinit();
        int  com;
                                                /* set up I/O */
        progname = argv[0];
        if (argc < 3) {
                stderr_v("arg count\n");
                quit(1);
        }
        devin = fdopen(atoi(argv[1]), "r");
        devout = fdopen(atoi(argv[2]), "w");
        if (devin == NULL || devout == NULL || getw(devin) != COM_SENDM) {
                stderr_v("connection failure\n");
                quit(1);
        }
                                                /* open device */
        if ((dev = dinit(argv[0], argv[3])) == NULL)
                quit(1);
        putw(COM_RECVM, devout);                /* verify initialization */
        putw(dev->xsiz, devout);
        putw(dev->ysiz, devout);
        fflush(devout);
                                                /* loop on requests */
        while ((com = getc(devin)) != EOF) {
                if (com >= NREQUESTS || dev_func[com] == NULL) {
                        stderr_v("invalid request\n");
                        quit(1);
                }
                (*dev_func[com])();             /* process request */
        }
        quit(0);                        /* all done, clean up and exit */
}


quit(code)                              /* close device and exit */
int     code;
{
        if (dev != NULL)
                (*dev->close)();
        exit(code);
}


r_clear()                               /* clear screen */
{
        int     xres, yres;

        xres = getw(devin);
        yres = getw(devin);
        (*dev->clear)(xres, yres);
}


r_paintr()                              /* paint a rectangle */
{
        COLOR   col;
        int     xmin, ymin, xmax, ymax;

        nrays += 5;                     /* pretend */
        fread(col, sizeof(COLOR), 1, devin);
        xmin = getw(devin); ymin = getw(devin);
        xmax = getw(devin); ymax = getw(devin);
        (*dev->paintr)(col, xmin, ymin, xmax, ymax);
                                        /* check for input */
        if (dev->inpready > notified) {
                kill(getppid(), SIGIO);
                notified = dev->inpready;
        }
}


r_getcur()                              /* get and return cursor position */
{
        int     c;
        int     x, y;
                                        /* get it if we can */
        if (dev->getcur == NULL) {
                c = ABORT;
                x = y = 0;
        } else
                c = (*dev->getcur)(&x, &y);
                                        /* reply */
        putc(COM_GETCUR, devout);
        putc(c, devout);
        putw(x, devout);
        putw(y, devout);
        fflush(devout);
}


r_comout()                              /* print string to command line */
{
        char    str[256];

        mygets(str, devin);
        (*dev->comout)(str);
}


r_comin()                               /* read string from command line */
{
        char    buf[256];
                                        /* get string */
        (*dev->comin)(buf);
                                        /* reply */
        putc(COM_COMIN, devout);
        myputs(buf, devout);
        fflush(devout);
                                        /* reset notify */
        notified = 0;
}


mygets(s, fp)                           /* get string from file (with nul) */
register char   *s;
register FILE   *fp;
{
        register int    c;

        while ((c = getc(fp)) != EOF)
                if ((*s++ = c) == '\0')
                        return;
        *s = '\0';
}


myputs(s, fp)                           /* put string to file (with nul) */
register char   *s;
register FILE   *fp;
{
        do
                putc(*s, fp);
        while (*s++);
}


repaint(xmin, ymin, xmax, ymax)         /* repaint section of display */
int     xmin, ymin, xmax, ymax;
{
        /* no can do! */
}


stderr_v(s)                             /* put string to stderr */
register char  *s;
{
        static int  inline = 0;

        if (!inline++) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (*s && s[strlen(s)-1] == '\n') {
                fflush(stderr);
                inline = 0;
        }
}
Revision:	1.2
Committed:	Wed Oct 25 16:49:45 1989 UTC (34 years, 6 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.1:	+5 -4 lines
Log Message:	removed superfluous error messages and added nrays variable
#	User	Rev	Content
1	greg	1.1	/* Copyright (c) 1989 Regents of the University of California */
2
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* devmain.c - main for independent drivers.
9			*
10			* Redefine your initialization routine to dinit.
11			*
12			* 10/25/89
13			*/
14
15			#include <stdio.h>
16
17			#include <signal.h>
18
19			#include "color.h"
20
21			#include "driver.h"
22
23			int (wrnvec)(), (errvec)(), (cmdvec)(); / error vectors, unused */
24
25	greg	1.2	long nrays = 0; /* fake it */
26
27	greg	1.1	struct driver dev = NULL; / output device */
28
29			FILE devin, devout; /* communications channels */
30
31			int notified = 0; /* notified parent of input? */
32
33			char progname; / driver name */
34
35			int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin();
36
37			int (dev_func[NREQUESTS])() = { / request handlers */
38			r_clear, r_paintr,
39			r_getcur, r_comout, r_comin
40			};
41
42
43			main(argc, argv) /* set up communications and main loop */
44			int argc;
45			char *argv[];
46			{
47			extern struct driver *dinit();
48			int com;
49			/* set up I/O */
50			progname = argv[0];
51			if (argc < 3) {
52			stderr_v("arg count\n");
53			quit(1);
54			}
55			devin = fdopen(atoi(argv[1]), "r");
56			devout = fdopen(atoi(argv[2]), "w");
57			if (devin == NULL \|\| devout == NULL \|\| getw(devin) != COM_SENDM) {
58			stderr_v("connection failure\n");
59			quit(1);
60			}
61			/* open device */
62	greg	1.2	if ((dev = dinit(argv[0], argv[3])) == NULL)
63	greg	1.1	quit(1);
64			putw(COM_RECVM, devout); /* verify initialization */
65			putw(dev->xsiz, devout);
66			putw(dev->ysiz, devout);
67			fflush(devout);
68			/* loop on requests */
69			while ((com = getc(devin)) != EOF) {
70			if (com >= NREQUESTS \|\| dev_func[com] == NULL) {
71			stderr_v("invalid request\n");
72			quit(1);
73			}
74			(dev_func[com])(); / process request */
75			}
76			quit(0); /* all done, clean up and exit */
77			}
78
79
80			quit(code) /* close device and exit */
81			int code;
82			{
83			if (dev != NULL)
84			(*dev->close)();
85			exit(code);
86			}
87
88
89			r_clear() /* clear screen */
90			{
91			int xres, yres;
92
93			xres = getw(devin);
94			yres = getw(devin);
95			(*dev->clear)(xres, yres);
96			}
97
98
99			r_paintr() /* paint a rectangle */
100			{
101			COLOR col;
102			int xmin, ymin, xmax, ymax;
103
104	greg	1.2	nrays += 5; /* pretend */
105	greg	1.1	fread(col, sizeof(COLOR), 1, devin);
106			xmin = getw(devin); ymin = getw(devin);
107			xmax = getw(devin); ymax = getw(devin);
108			(*dev->paintr)(col, xmin, ymin, xmax, ymax);
109			/* check for input */
110			if (dev->inpready > notified) {
111			kill(getppid(), SIGIO);
112			notified = dev->inpready;
113			}
114			}
115
116
117			r_getcur() /* get and return cursor position */
118			{
119			int c;
120			int x, y;
121			/* get it if we can */
122			if (dev->getcur == NULL) {
123			c = ABORT;
124			x = y = 0;
125			} else
126			c = (*dev->getcur)(&x, &y);
127			/* reply */
128			putc(COM_GETCUR, devout);
129			putc(c, devout);
130			putw(x, devout);
131			putw(y, devout);
132			fflush(devout);
133			}
134
135
136			r_comout() /* print string to command line */
137			{
138			char str[256];
139
140			mygets(str, devin);
141			(*dev->comout)(str);
142			}
143
144
145			r_comin() /* read string from command line */
146			{
147			char buf[256];
148			/* get string */
149			(*dev->comin)(buf);
150			/* reply */
151			putc(COM_COMIN, devout);
152			myputs(buf, devout);
153			fflush(devout);
154			/* reset notify */
155			notified = 0;
156			}
157
158
159			mygets(s, fp) /* get string from file (with nul) */
160			register char *s;
161			register FILE *fp;
162			{
163			register int c;
164
165			while ((c = getc(fp)) != EOF)
166			if ((*s++ = c) == '\0')
167			return;
168			*s = '\0';
169			}
170
171
172			myputs(s, fp) /* put string to file (with nul) */
173			register char *s;
174			register FILE *fp;
175			{
176			do
177			putc(*s, fp);
178			while (*s++);
179			}
180
181
182			repaint(xmin, ymin, xmax, ymax) /* repaint section of display */
183			int xmin, ymin, xmax, ymax;
184			{
185	greg	1.2	/* no can do! */
186	greg	1.1	}
187
188
189			stderr_v(s) /* put string to stderr */
190			register char *s;
191			{
192			static int inline = 0;
193
194			if (!inline++) {
195			fputs(progname, stderr);
196			fputs(": ", stderr);
197			}
198			fputs(s, stderr);
199			if (*s && s[strlen(s)-1] == '\n') {
200			fflush(stderr);
201			inline = 0;
202			}
203			}