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 */

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(), 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);
                                        /* check for input */
        if (!notified && dev->inpready > 0) {
                notified = 1;
                kill(getppid(), SIGIO);
        }
}


r_flush()                               /* flush output */
{
        if (dev->flush != NULL)
                (*dev->flush)();
}


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);
        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++);
}


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:	1.8
Committed:	Thu Feb 22 11:46:24 1990 UTC (34 years, 2 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.7:	+10 -5 lines
Log Message:	added explicit flush call to drivers
#	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			struct driver dev = NULL; / output device */
26
27			FILE devin, devout; /* communications channels */
28
29			int notified = 0; /* notified parent of input? */
30
31			char progname; / driver name */
32
33	greg	1.8	int r_clear(), r_paintr(), r_getcur(), r_comout(), r_comin(), r_flush();
34	greg	1.1
35			int (dev_func[NREQUESTS])() = { / request handlers */
36			r_clear, r_paintr,
37	greg	1.8	r_getcur, r_comout,
38			r_comin, r_flush
39	greg	1.1	};
40
41
42			main(argc, argv) /* set up communications and main loop */
43			int argc;
44			char *argv[];
45			{
46			extern struct driver *dinit();
47			int com;
48			/* set up I/O */
49			progname = argv[0];
50			if (argc < 3) {
51			stderr_v("arg count\n");
52			quit(1);
53			}
54			devin = fdopen(atoi(argv[1]), "r");
55			devout = fdopen(atoi(argv[2]), "w");
56			if (devin == NULL \|\| devout == NULL \|\| getw(devin) != COM_SENDM) {
57			stderr_v("connection failure\n");
58			quit(1);
59			}
60			/* open device */
61	greg	1.2	if ((dev = dinit(argv[0], argv[3])) == NULL)
62	greg	1.1	quit(1);
63			putw(COM_RECVM, devout); /* verify initialization */
64	greg	1.6	fwrite((char *)&dev->pixaspect, sizeof(dev->pixaspect), 1, devout);
65	greg	1.1	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	1.6	fread((char *)col, sizeof(COLOR), 1, devin);
105	greg	1.1	xmin = getw(devin); ymin = getw(devin);
106			xmax = getw(devin); ymax = getw(devin);
107			(*dev->paintr)(col, xmin, ymin, xmax, ymax);
108			/* check for input */
109	greg	1.3	if (!notified && dev->inpready > 0) {
110			notified = 1;
111	greg	1.1	kill(getppid(), SIGIO);
112			}
113	greg	1.8	}
114
115
116			r_flush() /* flush output */
117			{
118			if (dev->flush != NULL)
119			(*dev->flush)();
120	greg	1.1	}
121
122
123			r_getcur() /* get and return cursor position */
124			{
125			int c;
126			int x, y;
127			/* get it if we can */
128			if (dev->getcur == NULL) {
129			c = ABORT;
130			x = y = 0;
131			} else
132			c = (*dev->getcur)(&x, &y);
133			/* reply */
134			putc(COM_GETCUR, devout);
135			putc(c, devout);
136			putw(x, devout);
137			putw(y, devout);
138			fflush(devout);
139			}
140
141
142			r_comout() /* print string to command line */
143			{
144			char str[256];
145
146			mygets(str, devin);
147			(*dev->comout)(str);
148			}
149
150
151			r_comin() /* read string from command line */
152			{
153	greg	1.7	char buf[256], *prompt;
154			/* get prompt */
155			if (getc(devin)) {
156			mygets(buf, devin);
157			prompt = buf;
158			} else
159			prompt = NULL;
160	greg	1.1	/* get string */
161	greg	1.7	(*dev->comin)(buf, prompt);
162	greg	1.1	/* reply */
163			putc(COM_COMIN, devout);
164			myputs(buf, devout);
165			fflush(devout);
166			/* reset notify */
167			notified = 0;
168			}
169
170
171			mygets(s, fp) /* get string from file (with nul) */
172			register char *s;
173			register FILE *fp;
174			{
175			register int c;
176
177			while ((c = getc(fp)) != EOF)
178			if ((*s++ = c) == '\0')
179			return;
180			*s = '\0';
181			}
182
183
184			myputs(s, fp) /* put string to file (with nul) */
185			register char *s;
186			register FILE *fp;
187			{
188			do
189			putc(*s, fp);
190			while (*s++);
191			}
192
193
194			stderr_v(s) /* put string to stderr */
195			register char *s;
196			{
197			static int inline = 0;
198
199			if (!inline++) {
200			fputs(progname, stderr);
201			fputs(": ", stderr);
202			}
203			fputs(s, stderr);
204			if (*s && s[strlen(s)-1] == '\n') {
205			fflush(stderr);
206			inline = 0;
207			}
208			}