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Stars of Shareware: Programmierung
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SOURCE.mdf
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tiff
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mkspans.c
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C/C++ Source or Header
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1992-04-01
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1KB
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51 lines
#ifndef lint
static char rcsid[] = "$Header: /usr/people/sam/tiff/libtiff/RCS/mkspans.c,v 1.4 90/10/08 17:17:29 sam Exp $";
#endif
#include "tiffcompat.h"
/*
* Hack program to construct tables used to find
* runs of zeros and ones in Group 3 Fax encoding.
*/
dumparray(name, runs)
char *name;
unsigned char runs[256];
{
register int i;
register char *sep;
printf("static u_char %s[256] = {\n", name);
sep = " ";
for (i = 0; i < 256; i++) {
printf("%s%d", sep, runs[i]);
if (((i + 1) % 16) == 0) {
printf(", /* 0x%02x - 0x%02x */\n", i-15, i);
sep = " ";
} else
sep = ", ";
}
printf("\n};\n");
}
main()
{
unsigned char runs[2][256];
bzero(runs[0], 256*sizeof (char));
bzero(runs[1], 256*sizeof (char));
{ register int run, runlen, i;
runlen = 1;
for (run = 0x80; run != 0xff; run = (run>>1)|0x80) {
for (i = run-1; i >= 0; i--) {
runs[1][run|i] = runlen;
runs[0][(~(run|i)) & 0xff] = runlen;
}
runlen++;
}
runs[1][0xff] = runs[0][0] = 8;
}
dumparray("bruns", runs[0]);
dumparray("wruns", runs[1]);
}