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 "color.h"

#include "driver.h"

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

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

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

char    *progname;                              /* driver name */

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

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


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 */
        fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout);
        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;

        fread((char *)col, sizeof(COLOR), 1, devin);
        xmin = getw(devin); ymin = getw(devin);
        xmax = getw(devin); ymax = getw(devin);
        (*dev->paintr)(col, xmin, ymin, xmax, ymax);
}


r_flush()                               /* flush output */
{
        if (dev->flush != NULL)
                (*dev->flush)();
        putc(COM_FLUSH, devout);
        putw(dev->inpready, devout);
        fflush(devout);
}


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], *prompt;
                                        /* get prompt */
        if (getc(devin)) {
                mygets(buf, devin);
                prompt = buf;
        } else
                prompt = NULL;
                                        /* get string */
        (*dev->comin)(buf, prompt);
                                        /* reply */
        putc(COM_COMIN, devout);
        myputs(buf, devout);
        putw(dev->inpready, devout);
        fflush(devout);
}


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++);
}


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:	1.9
Committed:	Thu Feb 22 12:45:25 1990 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.8:	+4 -11 lines
Log Message:	Changed devcomm so that flush() is used to check for input
#	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 "color.h"
18
19			#include "driver.h"
20
21			int (wrnvec)(), (errvec)(), (cmdvec)(); / error vectors, unused */
22
23			struct driver dev = NULL; / output device */
24
25			FILE devin, devout; /* communications channels */
26
27			char progname; / driver name */
28
29	greg	1.8	int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_flush();
30	greg	1.1
31			int (dev_func[NREQUESTS])() = { / request handlers */
32			r_clear, r_paintr,
33	greg	1.8	r_getcur, r_comout,
34			r_comin, r_flush
35	greg	1.1	};
36
37
38			main(argc, argv) /* set up communications and main loop */
39			int argc;
40			char *argv[];
41			{
42			extern struct driver *dinit();
43			int com;
44			/* set up I/O */
45			progname = argv[0];
46			if (argc < 3) {
47			stderr_v("arg count\n");
48			quit(1);
49			}
50			devin = fdopen(atoi(argv[1]), "r");
51			devout = fdopen(atoi(argv[2]), "w");
52			if (devin == NULL \|\| devout == NULL \|\| getw(devin) != COM_SENDM) {
53			stderr_v("connection failure\n");
54			quit(1);
55			}
56			/* open device */
57	greg	1.2	if ((dev = dinit(argv[0], argv[3])) == NULL)
58	greg	1.1	quit(1);
59			putw(COM_RECVM, devout); /* verify initialization */
60	greg	1.6	fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout);
61	greg	1.1	putw(dev->xsiz, devout);
62			putw(dev->ysiz, devout);
63			fflush(devout);
64			/* loop on requests */
65			while ((com = getc(devin)) != EOF) {
66			if (com >= NREQUESTS \|\| dev_func[com] == NULL) {
67			stderr_v("invalid request\n");
68			quit(1);
69			}
70			(dev_func[com])(); / process request */
71			}
72			quit(0); /* all done, clean up and exit */
73			}
74
75
76			quit(code) /* close device and exit */
77			int code;
78			{
79			if (dev != NULL)
80			(*dev->close)();
81			exit(code);
82			}
83
84
85			r_clear() /* clear screen */
86			{
87			int xres, yres;
88
89			xres = getw(devin);
90			yres = getw(devin);
91			(*dev->clear)(xres, yres);
92			}
93
94
95			r_paintr() /* paint a rectangle */
96			{
97			COLOR col;
98			int xmin, ymin, xmax, ymax;
99
100	greg	1.6	fread((char *)col, sizeof(COLOR), 1, devin);
101	greg	1.1	xmin = getw(devin); ymin = getw(devin);
102			xmax = getw(devin); ymax = getw(devin);
103			(*dev->paintr)(col, xmin, ymin, xmax, ymax);
104	greg	1.8	}
105
106
107			r_flush() /* flush output */
108			{
109			if (dev->flush != NULL)
110			(*dev->flush)();
111	greg	1.9	putc(COM_FLUSH, devout);
112			putw(dev->inpready, devout);
113			fflush(devout);
114	greg	1.1	}
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	greg	1.7	char buf[256], *prompt;
148			/* get prompt */
149			if (getc(devin)) {
150			mygets(buf, devin);
151			prompt = buf;
152			} else
153			prompt = NULL;
154	greg	1.1	/* get string */
155	greg	1.7	(*dev->comin)(buf, prompt);
156	greg	1.1	/* reply */
157			putc(COM_COMIN, devout);
158			myputs(buf, devout);
159	greg	1.9	putw(dev->inpready, devout);
160	greg	1.1	fflush(devout);
161			}
162
163
164			mygets(s, fp) /* get string from file (with nul) */
165			register char *s;
166			register FILE *fp;
167			{
168			register int c;
169
170			while ((c = getc(fp)) != EOF)
171			if ((*s++ = c) == '\0')
172			return;
173			*s = '\0';
174			}
175
176
177			myputs(s, fp) /* put string to file (with nul) */
178			register char *s;
179			register FILE *fp;
180			{
181			do
182			putc(*s, fp);
183			while (*s++);
184			}
185
186
187			stderr_v(s) /* put string to stderr */
188			register char *s;
189			{
190			static int inline = 0;
191
192			if (!inline++) {
193			fputs(progname, stderr);
194			fputs(": ", stderr);
195			}
196			fputs(s, stderr);
197			if (*s && s[strlen(s)-1] == '\n') {
198			fflush(stderr);
199			inline = 0;
200			}
201			}