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 "standard.h"

#include "color.h"

#include "driver.h"

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) {
                eputs("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) {
                eputs("connection failure\n");
                quit(1);
        }
                                                /* open device */
        if ((dev = dinit(argv[0], argv[3])) == NULL)
                quit(1);
        putw(COM_RECVM, devout);                /* verify initialization */
        sendstate();
        fflush(devout);
                                                /* loop on requests */
        while ((com = getc(devin)) != EOF) {
                if (com >= NREQUESTS || dev_func[com] == NULL) {
                        eputs("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);
        sendstate();
        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);
        sendstate();
        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++);
}


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

        if (!*s)
                return;
        if (!midline++) {
                fputs(progname, stderr);
                fputs(": ", stderr);
        }
        fputs(s, stderr);
        if (s[strlen(s)-1] == '\n') {
                fflush(stderr);
                midline = 0;
        }
}


sendstate()                             /* send driver state variables */
{
        fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout);
        putw(dev->xsiz, devout);
        putw(dev->ysiz, devout);
        putw(dev->inpready, devout);
}
Revision:	2.2
Committed:	Tue Nov 11 20:02:59 1997 UTC (28 years ago) by gregl
Content type:	text/plain
Branch:	MAIN
Changes since 2.1:	+5 -7 lines
Log Message:	created erract structure containing error messages and actions
#	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	gregl	2.2	#include "standard.h"
16	greg	1.1
17			#include "color.h"
18
19			#include "driver.h"
20
21			struct driver dev = NULL; / output device */
22
23			FILE devin, devout; /* communications channels */
24
25			char progname; / driver name */
26
27	greg	1.8	int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_flush();
28	greg	1.1
29			int (dev_func[NREQUESTS])() = { / request handlers */
30			r_clear, r_paintr,
31	greg	1.8	r_getcur, r_comout,
32			r_comin, r_flush
33	greg	1.1	};
34
35
36			main(argc, argv) /* set up communications and main loop */
37			int argc;
38			char *argv[];
39			{
40			extern struct driver *dinit();
41			int com;
42			/* set up I/O */
43			progname = argv[0];
44			if (argc < 3) {
45	gregl	2.2	eputs("arg count\n");
46	greg	1.1	quit(1);
47			}
48			devin = fdopen(atoi(argv[1]), "r");
49			devout = fdopen(atoi(argv[2]), "w");
50			if (devin == NULL \|\| devout == NULL \|\| getw(devin) != COM_SENDM) {
51	gregl	2.2	eputs("connection failure\n");
52	greg	1.1	quit(1);
53			}
54			/* open device */
55	greg	1.2	if ((dev = dinit(argv[0], argv[3])) == NULL)
56	greg	1.1	quit(1);
57			putw(COM_RECVM, devout); /* verify initialization */
58	greg	1.11	sendstate();
59	greg	1.1	fflush(devout);
60			/* loop on requests */
61			while ((com = getc(devin)) != EOF) {
62			if (com >= NREQUESTS \|\| dev_func[com] == NULL) {
63	gregl	2.2	eputs("invalid request\n");
64	greg	1.1	quit(1);
65			}
66			(dev_func[com])(); / process request */
67			}
68			quit(0); /* all done, clean up and exit */
69			}
70
71
72			quit(code) /* close device and exit */
73			int code;
74			{
75			if (dev != NULL)
76			(*dev->close)();
77			exit(code);
78			}
79
80
81			r_clear() /* clear screen */
82			{
83			int xres, yres;
84
85			xres = getw(devin);
86			yres = getw(devin);
87			(*dev->clear)(xres, yres);
88			}
89
90
91			r_paintr() /* paint a rectangle */
92			{
93			COLOR col;
94			int xmin, ymin, xmax, ymax;
95
96	greg	1.6	fread((char *)col, sizeof(COLOR), 1, devin);
97	greg	1.1	xmin = getw(devin); ymin = getw(devin);
98			xmax = getw(devin); ymax = getw(devin);
99			(*dev->paintr)(col, xmin, ymin, xmax, ymax);
100	greg	1.8	}
101
102
103			r_flush() /* flush output */
104			{
105			if (dev->flush != NULL)
106			(*dev->flush)();
107	greg	1.9	putc(COM_FLUSH, devout);
108	greg	1.11	sendstate();
109	greg	1.9	fflush(devout);
110	greg	1.1	}
111
112
113			r_getcur() /* get and return cursor position */
114			{
115			int c;
116			int x, y;
117			/* get it if we can */
118			if (dev->getcur == NULL) {
119			c = ABORT;
120			x = y = 0;
121			} else
122			c = (*dev->getcur)(&x, &y);
123			/* reply */
124			putc(COM_GETCUR, devout);
125			putc(c, devout);
126			putw(x, devout);
127			putw(y, devout);
128			fflush(devout);
129			}
130
131
132			r_comout() /* print string to command line */
133			{
134			char str[256];
135
136			mygets(str, devin);
137			(*dev->comout)(str);
138			}
139
140
141			r_comin() /* read string from command line */
142			{
143	greg	1.7	char buf[256], *prompt;
144			/* get prompt */
145			if (getc(devin)) {
146			mygets(buf, devin);
147			prompt = buf;
148			} else
149			prompt = NULL;
150	greg	1.1	/* get string */
151	greg	1.7	(*dev->comin)(buf, prompt);
152	greg	1.1	/* reply */
153			putc(COM_COMIN, devout);
154			myputs(buf, devout);
155	greg	1.11	sendstate();
156	greg	1.1	fflush(devout);
157			}
158
159
160			mygets(s, fp) /* get string from file (with nul) */
161			register char *s;
162			register FILE *fp;
163			{
164			register int c;
165
166			while ((c = getc(fp)) != EOF)
167			if ((*s++ = c) == '\0')
168			return;
169			*s = '\0';
170			}
171
172
173			myputs(s, fp) /* put string to file (with nul) */
174			register char *s;
175			register FILE *fp;
176			{
177			do
178			putc(*s, fp);
179			while (*s++);
180			}
181
182
183	gregl	2.2	eputs(s) /* put string to stderr */
184	greg	1.1	register char *s;
185			{
186	greg	1.12	static int midline = 0;
187	greg	1.1
188	greg	1.13	if (!*s)
189			return;
190	greg	1.12	if (!midline++) {
191	greg	1.1	fputs(progname, stderr);
192			fputs(": ", stderr);
193			}
194			fputs(s, stderr);
195	greg	1.13	if (s[strlen(s)-1] == '\n') {
196	greg	1.1	fflush(stderr);
197	greg	1.12	midline = 0;
198	greg	1.1	}
199	greg	1.11	}
200
201
202			sendstate() /* send driver state variables */
203			{
204			fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout);
205			putw(dev->xsiz, devout);
206			putw(dev->ysiz, devout);
207			putw(dev->inpready, devout);
208	greg	1.1	}