| 12 |
|
|
| 13 |
|
#include <stdio.h> |
| 14 |
|
|
| 15 |
+ |
#include <math.h> |
| 16 |
+ |
|
| 17 |
|
#include "color.h" |
| 18 |
|
|
| 19 |
|
#define MINELEN 8 /* minimum scanline length for encoding */ |
| 20 |
< |
#define MAXELEN 0x7ffe /* maximum scanline length for encoding */ |
| 20 |
> |
#define MAXELEN 0x7fff /* maximum scanline length for encoding */ |
| 21 |
|
#define MINRUN 4 /* minimum run length */ |
| 22 |
|
|
| 21 |
– |
#ifndef frexp |
| 22 |
– |
extern double frexp(); |
| 23 |
– |
#endif |
| 23 |
|
|
| 25 |
– |
|
| 24 |
|
char * |
| 25 |
|
tempbuffer(len) /* get a temporary buffer */ |
| 26 |
|
unsigned len; |
| 98 |
|
register FILE *fp; |
| 99 |
|
{ |
| 100 |
|
register int i, j; |
| 101 |
< |
int code; |
| 101 |
> |
int code, val; |
| 102 |
|
/* determine scanline type */ |
| 103 |
|
if (len < MINELEN | len > MAXELEN) |
| 104 |
|
return(oldreadcolrs(scanline, len, fp)); |
| 125 |
|
if ((code = getc(fp)) == EOF) |
| 126 |
|
return(-1); |
| 127 |
|
if (code > 128) { /* run */ |
| 128 |
< |
scanline[j++][i] = getc(fp); |
| 129 |
< |
for (code &= 127; --code; j++) |
| 130 |
< |
scanline[j][i] = scanline[j-1][i]; |
| 128 |
> |
code &= 127; |
| 129 |
> |
val = getc(fp); |
| 130 |
> |
while (code--) |
| 131 |
> |
scanline[j++][i] = val; |
| 132 |
|
} else /* non-run */ |
| 133 |
|
while (code--) |
| 134 |
|
scanline[j++][i] = getc(fp); |
