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greg |
1.1 |
#ifndef lint
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greg |
2.8 |
static const char RCSid[] = "$Id: resolu.c,v 2.7 2022/03/03 03:55:13 greg Exp $";
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greg |
1.1 |
#endif
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/*
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* Read and write image resolutions.
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greg |
2.3 |
*
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| 7 |
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* Externals declared in resolu.h
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*/
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greg |
2.4 |
#include "copyright.h"
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greg |
1.1 |
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schorsch |
2.6 |
#include <stdlib.h>
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greg |
1.1 |
#include <stdio.h>
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| 15 |
greg |
1.2 |
#include "resolu.h"
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greg |
1.1 |
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greg |
1.2 |
char resolu_buf[RESOLU_BUFLEN]; /* resolution line buffer */
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greg |
2.3 |
void
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greg |
1.2 |
fputresolu(ord, sl, ns, fp) /* put out picture dimensions */
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int ord; /* scanline ordering */
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int sl, ns; /* scanline length and number */
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greg |
1.1 |
FILE *fp;
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{
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greg |
1.2 |
RESOLU rs;
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greg |
2.3 |
if ((rs.rt = ord) & YMAJOR) {
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greg |
1.2 |
rs.xr = sl;
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rs.yr = ns;
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} else {
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rs.xr = ns;
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rs.yr = sl;
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}
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fputsresolu(&rs, fp);
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greg |
1.1 |
}
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| 40 |
greg |
1.2 |
int
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| 41 |
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fgetresolu(sl, ns, fp) /* get picture dimensions */
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int *sl, *ns; /* scanline length and number */
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greg |
1.1 |
FILE *fp;
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{
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greg |
1.2 |
RESOLU rs;
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if (!fgetsresolu(&rs, fp))
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return(-1);
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greg |
2.3 |
if (rs.rt & YMAJOR) {
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| 50 |
greg |
1.2 |
*sl = rs.xr;
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*ns = rs.yr;
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} else {
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*sl = rs.yr;
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*ns = rs.xr;
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| 55 |
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}
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greg |
2.3 |
return(rs.rt);
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greg |
1.2 |
}
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| 59 |
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char *
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resolu2str(buf, rp) /* convert resolution struct to line */
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char *buf;
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register RESOLU *rp;
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{
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greg |
2.3 |
if (rp->rt&YMAJOR)
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| 66 |
greg |
2.8 |
sprintf(buf, "%cY %8d %cX %8d\n",
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greg |
2.3 |
rp->rt&YDECR ? '-' : '+', rp->yr,
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rp->rt&XDECR ? '-' : '+', rp->xr);
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greg |
1.2 |
else
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| 70 |
greg |
2.8 |
sprintf(buf, "%cX %8d %cY %8d\n",
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greg |
2.3 |
rp->rt&XDECR ? '-' : '+', rp->xr,
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| 72 |
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rp->rt&YDECR ? '-' : '+', rp->yr);
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greg |
1.2 |
return(buf);
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}
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greg |
2.3 |
int
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| 78 |
greg |
1.2 |
str2resolu(rp, buf) /* convert resolution line to struct */
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register RESOLU *rp;
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char *buf;
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| 81 |
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{
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| 82 |
greg |
2.2 |
register char *xndx, *yndx;
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| 83 |
greg |
1.1 |
register char *cp;
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| 85 |
greg |
1.2 |
if (buf == NULL)
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| 86 |
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return(0);
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| 87 |
greg |
1.1 |
xndx = yndx = NULL;
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| 88 |
greg |
2.2 |
for (cp = buf; *cp; cp++)
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| 89 |
greg |
1.1 |
if (*cp == 'X')
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| 90 |
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xndx = cp;
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else if (*cp == 'Y')
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| 92 |
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yndx = cp;
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| 93 |
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if (xndx == NULL || yndx == NULL)
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| 94 |
greg |
1.2 |
return(0);
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| 95 |
greg |
2.3 |
rp->rt = 0;
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| 96 |
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if (xndx > yndx) rp->rt |= YMAJOR;
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| 97 |
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if (xndx[-1] == '-') rp->rt |= XDECR;
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| 98 |
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if (yndx[-1] == '-') rp->rt |= YDECR;
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| 99 |
greg |
1.2 |
if ((rp->xr = atoi(xndx+1)) <= 0)
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| 100 |
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return(0);
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| 101 |
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if ((rp->yr = atoi(yndx+1)) <= 0)
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| 102 |
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return(0);
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| 103 |
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return(1);
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| 104 |
greg |
1.1 |
}
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