src/px/pcomb.c

/* Copyright (c) 1991 Regents of the University of California */

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

/*
 *  Combine picture files according to calcomp functions.
 *
 *      1/4/89
 */

#include <stdio.h>

#include <errno.h>

#include "color.h"

#include "calcomp.h"

#define MAXINP          32              /* maximum number of input files */
#define WINSIZ          9               /* scanline window size */
#define MIDSCN          4               /* current scan position */

#define BRT             (-1)            /* special index for brightness */

struct {
        char    *name;          /* file name */
        FILE    *fp;            /* stream pointer */
        COLOR   *scan[WINSIZ];  /* input scanline window */
        COLOR   coef;           /* coefficient */
}       input[MAXINP];                  /* input pictures */

int     nfiles;                         /* number of input files */

char    *vcolin[3] = {"ri", "gi", "bi"};
char    *vcolout[3] = {"ro", "go", "bo"};
char    vbrtin[] = "li";
char    vbrtout[] = "lo";
char    *vcolcoef[3] = {"rc", "gc", "bc"};
char    vbrtcoef[] = "lc";

#define vnfiles         "nfiles"
#define vxres           "xres"
#define vyres           "yres"
#define vxpos           "x"
#define vypos           "y"

int     nowarn = 0;                     /* no warning messages? */

int     original = 0;                   /* origninal values? */

int     xres=0, yres=0;                 /* picture resolution */

int     xpos, ypos;                     /* picture position */

int     wrongformat = 0;


main(argc, argv)
int     argc;
char    *argv[];
{
        double  f;
        int     a, i;
                                                /* scan options */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                                xres = atoi(argv[++a]);
                                continue;
                        case 'y':
                                yres = atoi(argv[++a]);
                                continue;
                        case 'w':
                                nowarn = !nowarn;
                                continue;
                        case 'o':
                                original = !original;
                                continue;
                        case 'f':
                        case 'e':
                                continue;
                        }
                break;
        }
                                        /* process files */
        for (nfiles = 0; nfiles < MAXINP; nfiles++)
                setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
        nfiles = 0;
        for ( ; a < argc; a++) {
                if (nfiles >= MAXINP) {
                        eputs(argv[0]);
                        eputs(": too many picture files\n");
                        quit(1);
                }
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case '\0':
                                input[nfiles].name = "<stdin>";
                                input[nfiles].fp = stdin;
                                break;
                        case 's':
                                f = atof(argv[++a]);
                                scalecolor(input[nfiles].coef, f);
                                continue;
                        case 'c':
                                colval(input[nfiles].coef,RED)*=atof(argv[++a]);
                                colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
                                colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
                                continue;
                        default:
                                goto usage;
                        }
                else {
                        input[nfiles].name = argv[a];
                        input[nfiles].fp = fopen(argv[a], "r");
                        if (input[nfiles].fp == NULL) {
                                perror(argv[a]);
                                quit(1);
                        }
                }
                nfiles++;
        }
        initfiles();            /* initialize files and variables */
                                        /* go back and get expressions */
        for (a = 1; a < argc; a++) {
                if (argv[a][0] == '-')
                        switch (argv[a][1]) {
                        case 'x':
                        case 'y':
                        case 'w':
                        case 'o':
                                continue;
                        case 'f':
                                fcompile(argv[++a]);
                                continue;
                        case 'e':
                                scompile(argv[++a], NULL, 0);
                                continue;
                        }
                break;
        }
                                                /* complete header */
        printargs(argc, argv, stdout);
        fputformat(COLRFMT, stdout);
        putchar('\n');
        fputresolu(YMAJOR|YDECR, xres, yres, stdout);
                                                /* combine pictures */
        combine();
        quit(0);
usage:
        eputs("Usage: ");
        eputs(argv[0]);
        eputs(
" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-s f][-c r g b] pic ..]\n");
        quit(1);
}


tputs(s)                        /* put out string preceded by a tab */
char    *s;
{
        char    fmt[32];
        double  d;
        COLOR   ctmp;

        if (isformat(s)) {                      /* check format */
                formatval(fmt, s);
                wrongformat = strcmp(fmt, COLRFMT);
        } else if (original && isexpos(s)) {    /* exposure */
                d = 1.0/exposval(s);
                scalecolor(input[nfiles].coef, d);
        } else if (original && iscolcor(s)) {   /* color correction */
                colcorval(ctmp, s);
                colval(input[nfiles].coef,RED) /= colval(ctmp,RED);
                colval(input[nfiles].coef,GRN) /= colval(ctmp,GRN);
                colval(input[nfiles].coef,BLU) /= colval(ctmp,BLU);
        } else {                                /* echo unaffected line */
                putchar('\t');
                fputs(s, stdout);
        }

}


initfiles()                     /* ready files and set variables */
{
        double  l_colin(), l_coef();
        register int    n, i;
                                        /* process picture headers */
        for (n = 0; n < nfiles; n++) {
                fputs(input[n].name, stdout);
                fputs(":\n", stdout);
                getheader(input[n].fp, tputs, NULL);
                if (wrongformat) {
                        eputs(input[n].name);
                        eputs(": not in Radiance picture format\n");
                        quit(1);
                }
                if (fgetresolu(&xpos, &ypos, input[n].fp) != (YMAJOR|YDECR)) {
                        eputs(input[n].name);
                        eputs(": bad picture size\n");
                        quit(1);
                }
                if (xres == 0 && yres == 0) {
                        xres = xpos;
                        yres = ypos;
                } else if (xpos != xres || ypos != yres) {
                        eputs(input[n].name);
                        eputs(": resolution mismatch\n");
                        quit(1);
                }
                for (i = 0; i < WINSIZ; i++)
                        input[n].scan[i] = (COLOR *)emalloc(xres*sizeof(COLOR));
        }
                                                /* prime input */
        for (ypos = yres+(MIDSCN-1); ypos >= yres; ypos--)
                advance();
                                                /* define constants */
        varset(vnfiles, ':', (double)nfiles);
        varset(vxres, ':', (double)xres);
        varset(vyres, ':', (double)yres);
                                                /* set functions */
        for (i = 0; i < 3; i++) {
                funset(vcolcoef[i], 1, ':', l_coef);
                funset(vcolin[i], 1, '=', l_colin);
        }
        funset(vbrtcoef, 1, ':', l_coef);
        funset(vbrtin, 1, '=', l_colin);
}


combine()                       /* combine pictures */
{
        EPNODE  *coldef[3], *brtdef;
        COLOR   *scanout;
        double  d;
        register int    i, j;
                                                /* check defined variables */
        for (j = 0; j < 3; j++) {
                if (vardefined(vcolout[j]))
                        coldef[j] = eparse(vcolout[j]);
                else
                        coldef[j] = NULL;
        }
        if (vardefined(vbrtout))
                brtdef = eparse(vbrtout);
        else
                brtdef = NULL;
                                                /* allocate scanline */
        scanout = (COLOR *)emalloc(xres*sizeof(COLOR));
                                                /* combine files */
        for (ypos = yres-1; ypos >= 0; ypos--) {
            advance();
            varset(vypos, '=', (double)ypos);
            for (xpos = 0; xpos < xres; xpos++) {
                varset(vxpos, '=', (double)xpos);
                eclock++;
                if (brtdef != NULL) {
                    d = evalue(brtdef);
                    if (d < 0.0)
                        d = 0.0;
                    setcolor(scanout[xpos], d, d, d);
                } else {
                    for (j = 0; j < 3; j++) {
                        if (coldef[j] != NULL) {
                                d = evalue(coldef[j]);
                        } else {
                            d = 0.0;
                            for (i = 0; i < nfiles; i++)
                                d += colval(input[i].scan[MIDSCN][xpos],j);
                        }
                        if (d < 0.0)
                            d = 0.0;
                        colval(scanout[xpos],j) = d;
                    }
                }
            }
            if (fwritescan(scanout, xres, stdout) < 0) {
                    perror("write error");
                    quit(1);
            }
        }
        efree(scanout);
}


advance()                       /* read in next scanline */
{
        register COLOR  *st;
        register int    i, j;

        for (i = 0; i < nfiles; i++) {
                st = input[i].scan[WINSIZ-1];
                for (j = WINSIZ-1; j > 0; j--)  /* rotate window */
                        input[i].scan[j] = input[i].scan[j-1];
                input[i].scan[0] = st;
                if (ypos < MIDSCN)              /* hit bottom */
                        continue;
                if (freadscan(st, xres, input[i].fp) < 0) {
                        eputs(input[i].name);
                        eputs(": read error\n");
                        quit(1);
                }
                for (j = 0; j < xres; j++)      /* adjust color */
                        multcolor(st[j], input[i].coef);
        }
}


double
l_coef(nam)                     /* return picture coefficients */
register char   *nam;
{
        register int    fn, n;
        double  d;

        fn = (d = argument(1)) - .5;
        if (d <= -.5 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        if (d < .5)
                return((double)nfiles);
        if (nam == vbrtcoef)
                return(bright(input[fn].coef));
        n = 3;
        while (n--)
                if (nam == vcolcoef[n])
                        return(colval(input[fn].coef,n));
        eputs("Bad call to l_coef()!\n");
        quit(1);
}


double
l_colin(nam)                    /* return color value for picture */
register char   *nam;
{
        int     fn;
        register int    n, xoff, yoff;
        double  d;

        fn = (d = argument(1)) - .5;
        if (d <= -.5 || fn >= nfiles) {
                errno = EDOM;
                return(0.0);
        }
        if (d < .5)
                return((double)nfiles);
        xoff = yoff = 0;
        n = nargum();
        if (n >= 2) {
                d = argument(2);
                if (d < 0.0) {
                        xoff = d-.5;
                        if (xpos+xoff < 0)
                                xoff = -xpos;
                } else {
                        xoff = d+.5;
                        if (xpos+xoff >= xres)
                                xoff = xres-1-xpos;
                }
        }
        if (n >= 3) {
                d = argument(3);
                if (d < 0.0) {
                        yoff = d-.5;
                        if (yoff+MIDSCN < 0)
                                yoff = -MIDSCN;
                        if (ypos+yoff < 0)
                                yoff = -ypos;
                } else {
                        yoff = d+.5;
                        if (yoff+MIDSCN >= WINSIZ)
                                yoff = WINSIZ-1-MIDSCN;
                        if (ypos+yoff >= yres)
                                yoff = yres-1-ypos;
                }
        }
        if (nam == vbrtin)
                return(bright(input[fn].scan[MIDSCN+yoff][xpos+xoff]));
        n = 3;
        while (n--)
            if (nam == vcolin[n])
                return(colval(input[fn].scan[MIDSCN+yoff][xpos+xoff],n));
        eputs("Bad call to l_colin()!\n");
        quit(1);
}


wputs(msg)
char    *msg;
{
        if (!nowarn)
                eputs(msg);
}


eputs(msg)
char    *msg;
{
        fputs(msg, stderr);
}


quit(code)
int     code;
{
        exit(code);
}
Revision:	1.15
Committed:	Fri May 24 14:46:14 1991 UTC (32 years, 11 months ago) by greg
Content type:	text/plain
Branch:	MAIN
Changes since 1.14:	+141 -122 lines
Log Message:	made it so constants are assigned before expressions are compiled added rc, gc, bc, and lc functions for returning image coefficients
#	User	Rev	Content
1	greg	1.8	/* Copyright (c) 1991 Regents of the University of California */
2	greg	1.1
3			#ifndef lint
4			static char SCCSid[] = "$SunId$ LBL";
5			#endif
6
7			/*
8			* Combine picture files according to calcomp functions.
9			*
10			* 1/4/89
11			*/
12
13			#include <stdio.h>
14
15			#include <errno.h>
16
17			#include "color.h"
18
19			#include "calcomp.h"
20
21	greg	1.6	#define MAXINP 32 /* maximum number of input files */
22	greg	1.14	#define WINSIZ 9 /* scanline window size */
23			#define MIDSCN 4 /* current scan position */
24	greg	1.1
25	greg	1.14	#define BRT (-1) /* special index for brightness */
26
27	greg	1.1	struct {
28			char name; / file name */
29			FILE fp; / stream pointer */
30	greg	1.14	COLOR scan[WINSIZ]; / input scanline window */
31	greg	1.3	COLOR coef; /* coefficient */
32	greg	1.1	} input[MAXINP]; /* input pictures */
33
34			int nfiles; /* number of input files */
35
36			char *vcolin[3] = {"ri", "gi", "bi"};
37			char *vcolout[3] = {"ro", "go", "bo"};
38	greg	1.15	char vbrtin[] = "li";
39			char vbrtout[] = "lo";
40			char *vcolcoef[3] = {"rc", "gc", "bc"};
41			char vbrtcoef[] = "lc";
42	greg	1.1
43	greg	1.8	#define vnfiles "nfiles"
44			#define vxres "xres"
45			#define vyres "yres"
46	greg	1.1	#define vxpos "x"
47			#define vypos "y"
48
49			int nowarn = 0; /* no warning messages? */
50
51	greg	1.9	int original = 0; /* origninal values? */
52
53	greg	1.1	int xres=0, yres=0; /* picture resolution */
54
55			int xpos, ypos; /* picture position */
56
57	greg	1.10	int wrongformat = 0;
58	greg	1.1
59	greg	1.10
60	greg	1.1	main(argc, argv)
61			int argc;
62			char *argv[];
63			{
64	greg	1.3	double f;
65	greg	1.14	int a, i;
66	greg	1.15	/* scan options */
67			for (a = 1; a < argc; a++) {
68	greg	1.1	if (argv[a][0] == '-')
69			switch (argv[a][1]) {
70			case 'x':
71			xres = atoi(argv[++a]);
72	greg	1.15	continue;
73	greg	1.1	case 'y':
74			yres = atoi(argv[++a]);
75	greg	1.15	continue;
76	greg	1.1	case 'w':
77			nowarn = !nowarn;
78	greg	1.15	continue;
79	greg	1.9	case 'o':
80			original = !original;
81	greg	1.15	continue;
82	greg	1.1	case 'f':
83			case 'e':
84	greg	1.15	continue;
85	greg	1.1	}
86	greg	1.15	break;
87			}
88			/* process files */
89	greg	1.3	for (nfiles = 0; nfiles < MAXINP; nfiles++)
90			setcolor(input[nfiles].coef, 1.0, 1.0, 1.0);
91	greg	1.1	nfiles = 0;
92			for ( ; a < argc; a++) {
93			if (nfiles >= MAXINP) {
94			eputs(argv[0]);
95			eputs(": too many picture files\n");
96			quit(1);
97			}
98	greg	1.3	if (argv[a][0] == '-')
99			switch (argv[a][1]) {
100			case '\0':
101			input[nfiles].name = "<stdin>";
102			input[nfiles].fp = stdin;
103			break;
104			case 's':
105			f = atof(argv[++a]);
106			scalecolor(input[nfiles].coef, f);
107			continue;
108			case 'c':
109			colval(input[nfiles].coef,RED)*=atof(argv[++a]);
110			colval(input[nfiles].coef,GRN)*=atof(argv[++a]);
111			colval(input[nfiles].coef,BLU)*=atof(argv[++a]);
112			continue;
113			default:
114			goto usage;
115			}
116			else {
117	greg	1.1	input[nfiles].name = argv[a];
118			input[nfiles].fp = fopen(argv[a], "r");
119			if (input[nfiles].fp == NULL) {
120	greg	1.6	perror(argv[a]);
121	greg	1.1	quit(1);
122			}
123			}
124	greg	1.15	nfiles++;
125			}
126			initfiles(); /* initialize files and variables */
127			/* go back and get expressions */
128			for (a = 1; a < argc; a++) {
129			if (argv[a][0] == '-')
130			switch (argv[a][1]) {
131			case 'x':
132			case 'y':
133			case 'w':
134			case 'o':
135			continue;
136			case 'f':
137			fcompile(argv[++a]);
138			continue;
139			case 'e':
140			scompile(argv[++a], NULL, 0);
141			continue;
142			}
143			break;
144			}
145			/* complete header */
146			printargs(argc, argv, stdout);
147			fputformat(COLRFMT, stdout);
148			putchar('\n');
149			fputresolu(YMAJOR\|YDECR, xres, yres, stdout);
150			/* combine pictures */
151			combine();
152			quit(0);
153			usage:
154			eputs("Usage: ");
155			eputs(argv[0]);
156			eputs(
157			" [-w][-h][-x xr][-y yr][-e expr][-f file] [ [-s f][-c r g b] pic ..]\n");
158			quit(1);
159			}
160
161
162			tputs(s) /* put out string preceded by a tab */
163			char *s;
164			{
165			char fmt[32];
166			double d;
167			COLOR ctmp;
168
169			if (isformat(s)) { /* check format */
170			formatval(fmt, s);
171			wrongformat = strcmp(fmt, COLRFMT);
172			} else if (original && isexpos(s)) { /* exposure */
173			d = 1.0/exposval(s);
174			scalecolor(input[nfiles].coef, d);
175			} else if (original && iscolcor(s)) { /* color correction */
176			colcorval(ctmp, s);
177			colval(input[nfiles].coef,RED) /= colval(ctmp,RED);
178			colval(input[nfiles].coef,GRN) /= colval(ctmp,GRN);
179			colval(input[nfiles].coef,BLU) /= colval(ctmp,BLU);
180			} else { /* echo unaffected line */
181			putchar('\t');
182			fputs(s, stdout);
183			}
184
185			}
186
187
188			initfiles() /* ready files and set variables */
189			{
190			double l_colin(), l_coef();
191			register int n, i;
192			/* process picture headers */
193			for (n = 0; n < nfiles; n++) {
194			fputs(input[n].name, stdout);
195	greg	1.1	fputs(":\n", stdout);
196	greg	1.15	getheader(input[n].fp, tputs, NULL);
197	greg	1.10	if (wrongformat) {
198	greg	1.15	eputs(input[n].name);
199	greg	1.10	eputs(": not in Radiance picture format\n");
200			quit(1);
201			}
202	greg	1.15	if (fgetresolu(&xpos, &ypos, input[n].fp) != (YMAJOR\|YDECR)) {
203			eputs(input[n].name);
204	greg	1.1	eputs(": bad picture size\n");
205			quit(1);
206			}
207			if (xres == 0 && yres == 0) {
208			xres = xpos;
209			yres = ypos;
210			} else if (xpos != xres \|\| ypos != yres) {
211	greg	1.15	eputs(input[n].name);
212	greg	1.1	eputs(": resolution mismatch\n");
213			quit(1);
214			}
215	greg	1.14	for (i = 0; i < WINSIZ; i++)
216	greg	1.15	input[n].scan[i] = (COLOR )emalloc(xressizeof(COLOR));
217	greg	1.1	}
218	greg	1.15	/* prime input */
219			for (ypos = yres+(MIDSCN-1); ypos >= yres; ypos--)
220			advance();
221			/* define constants */
222			varset(vnfiles, ':', (double)nfiles);
223			varset(vxres, ':', (double)xres);
224			varset(vyres, ':', (double)yres);
225			/* set functions */
226			for (i = 0; i < 3; i++) {
227			funset(vcolcoef[i], 1, ':', l_coef);
228			funset(vcolin[i], 1, '=', l_colin);
229			}
230			funset(vbrtcoef, 1, ':', l_coef);
231			funset(vbrtin, 1, '=', l_colin);
232	greg	1.1	}
233
234
235			combine() /* combine pictures */
236			{
237	greg	1.8	EPNODE coldef[3], brtdef;
238	greg	1.1	COLOR *scanout;
239	greg	1.8	double d;
240	greg	1.1	register int i, j;
241			/* check defined variables */
242	greg	1.4	for (j = 0; j < 3; j++) {
243			if (vardefined(vcolout[j]))
244			coldef[j] = eparse(vcolout[j]);
245			else
246			coldef[j] = NULL;
247			}
248	greg	1.8	if (vardefined(vbrtout))
249			brtdef = eparse(vbrtout);
250			else
251			brtdef = NULL;
252	greg	1.1	/* allocate scanline */
253			scanout = (COLOR )emalloc(xressizeof(COLOR));
254			/* combine files */
255			for (ypos = yres-1; ypos >= 0; ypos--) {
256	greg	1.14	advance();
257	greg	1.11	varset(vypos, '=', (double)ypos);
258	greg	1.8	for (xpos = 0; xpos < xres; xpos++) {
259	greg	1.11	varset(vxpos, '=', (double)xpos);
260	greg	1.8	eclock++;
261			if (brtdef != NULL) {
262			d = evalue(brtdef);
263			if (d < 0.0)
264			d = 0.0;
265			setcolor(scanout[xpos], d, d, d);
266			} else {
267			for (j = 0; j < 3; j++) {
268			if (coldef[j] != NULL) {
269	greg	1.13	d = evalue(coldef[j]);
270	greg	1.8	} else {
271	greg	1.13	d = 0.0;
272	greg	1.8	for (i = 0; i < nfiles; i++)
273	greg	1.14	d += colval(input[i].scan[MIDSCN][xpos],j);
274	greg	1.1	}
275	greg	1.13	if (d < 0.0)
276			d = 0.0;
277			colval(scanout[xpos],j) = d;
278	greg	1.8	}
279	greg	1.1	}
280	greg	1.8	}
281			if (fwritescan(scanout, xres, stdout) < 0) {
282			perror("write error");
283			quit(1);
284			}
285	greg	1.1	}
286			efree(scanout);
287			}
288
289
290	greg	1.14	advance() /* read in next scanline */
291			{
292			register COLOR *st;
293			register int i, j;
294
295			for (i = 0; i < nfiles; i++) {
296			st = input[i].scan[WINSIZ-1];
297			for (j = WINSIZ-1; j > 0; j--) /* rotate window */
298			input[i].scan[j] = input[i].scan[j-1];
299			input[i].scan[0] = st;
300			if (ypos < MIDSCN) /* hit bottom */
301			continue;
302			if (freadscan(st, xres, input[i].fp) < 0) {
303			eputs(input[i].name);
304			eputs(": read error\n");
305			quit(1);
306			}
307			for (j = 0; j < xres; j++) /* adjust color */
308			multcolor(st[j], input[i].coef);
309			}
310			}
311
312
313	greg	1.1	double
314	greg	1.15	l_coef(nam) /* return picture coefficients */
315			register char *nam;
316	greg	1.1	{
317	greg	1.15	register int fn, n;
318	greg	1.14	double d;
319
320			fn = (d = argument(1)) - .5;
321			if (d <= -.5 \|\| fn >= nfiles) {
322	greg	1.1	errno = EDOM;
323			return(0.0);
324			}
325	greg	1.14	if (d < .5)
326			return((double)nfiles);
327	greg	1.15	if (nam == vbrtcoef)
328			return(bright(input[fn].coef));
329			n = 3;
330			while (n--)
331			if (nam == vcolcoef[n])
332			return(colval(input[fn].coef,n));
333			eputs("Bad call to l_coef()!\n");
334			quit(1);
335			}
336
337
338			double
339			l_colin(nam) /* return color value for picture */
340			register char *nam;
341			{
342			int fn;
343			register int n, xoff, yoff;
344			double d;
345
346			fn = (d = argument(1)) - .5;
347			if (d <= -.5 \|\| fn >= nfiles) {
348			errno = EDOM;
349			return(0.0);
350			}
351			if (d < .5)
352			return((double)nfiles);
353	greg	1.14	xoff = yoff = 0;
354			n = nargum();
355			if (n >= 2) {
356			d = argument(2);
357			if (d < 0.0) {
358			xoff = d-.5;
359			if (xpos+xoff < 0)
360			xoff = -xpos;
361			} else {
362			xoff = d+.5;
363			if (xpos+xoff >= xres)
364			xoff = xres-1-xpos;
365			}
366			}
367			if (n >= 3) {
368			d = argument(3);
369			if (d < 0.0) {
370			yoff = d-.5;
371			if (yoff+MIDSCN < 0)
372			yoff = -MIDSCN;
373			if (ypos+yoff < 0)
374			yoff = -ypos;
375			} else {
376			yoff = d+.5;
377			if (yoff+MIDSCN >= WINSIZ)
378			yoff = WINSIZ-1-MIDSCN;
379			if (ypos+yoff >= yres)
380			yoff = yres-1-ypos;
381			}
382			}
383	greg	1.15	if (nam == vbrtin)
384	greg	1.14	return(bright(input[fn].scan[MIDSCN+yoff][xpos+xoff]));
385	greg	1.15	n = 3;
386			while (n--)
387			if (nam == vcolin[n])
388			return(colval(input[fn].scan[MIDSCN+yoff][xpos+xoff],n));
389			eputs("Bad call to l_colin()!\n");
390			quit(1);
391	greg	1.1	}
392
393
394			wputs(msg)
395			char *msg;
396			{
397			if (!nowarn)
398			eputs(msg);
399			}
400
401
402			eputs(msg)
403			char *msg;
404			{
405			fputs(msg, stderr);
406			}
407
408
409			quit(code)
410			int code;
411			{
412			exit(code);
413			}