mirror of
https://github.com/deater/dos33fsprogs.git
synced 2024-12-29 00:31:52 +00:00
100 lines
3.0 KiB
C
100 lines
3.0 KiB
C
/* code by qkumba */
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
|
|
int main(int argc, char **argv) {
|
|
|
|
int i = 0;
|
|
int e = 0,filesize;
|
|
int val,pv,final;
|
|
unsigned char in[1024];
|
|
unsigned char enc[1024];
|
|
int third;
|
|
|
|
printf("1REM");
|
|
filesize=read(0,in,1024);
|
|
do {
|
|
third = ((in[i + 2] & 3) << 4) +
|
|
((in[i + 1] & 3) << 2) + (in[i + 0] & 3);
|
|
enc[e++]=third+32;
|
|
if (i<filesize) {
|
|
val=in[i+0];
|
|
pv=val;
|
|
val=val+0x40;
|
|
val-=third;
|
|
// val&=0xff;
|
|
val=val>>2;
|
|
val=val+32;
|
|
final=((val-32)<<2)+third-0x40;
|
|
fprintf(stderr,"%d: %x -> %x %x ==> %x\n",
|
|
i,pv,val,third,final);
|
|
if (pv!=final) fprintf(stderr,"error0: no match!\n");
|
|
if (val<0) fprintf(stderr,"error0, negative! in=%x e=%x val=%x\n",
|
|
in[i+0],third,val);
|
|
if (val<0x20) fprintf(stderr,"error0, unprintable! in=%x pv=%x e=%x val=%x\n",
|
|
in[i+0],pv,third,val);
|
|
if (val>0x7e) fprintf(stderr,"error0, too big! in=%x pv=%x e=%x val=%x\n",
|
|
in[i+0],pv,third,val);
|
|
printf("%c",val); //(in[i + 0] >> 2) + 32);
|
|
}
|
|
if (i + 1 < filesize) {
|
|
val=in[i+1];
|
|
pv=val;
|
|
val=val+0x40;
|
|
val-=(third>>2);
|
|
// val&=0xff;
|
|
val=val>>2;
|
|
val=val+32;
|
|
final=((val-32)<<2)+(third>>2)-0x40;
|
|
|
|
fprintf(stderr,"%d: %x -> %x %x ==> %x\n",
|
|
i+1,pv,val,third>>2,final);
|
|
if (pv!=final) fprintf(stderr,"error1: no match!\n");
|
|
if (val<0) fprintf(stderr,"error1, negative! %x %x\n",
|
|
in[i+0]&0xfc,third);
|
|
if (val<0x20) fprintf(stderr,"error1, unprintable! %x %x\n",
|
|
in[i+0]&0xfc,third);
|
|
if (val>0x7e) fprintf(stderr,"error1, too big! in=%x pv=%x e=%x val=%x\n",
|
|
in[i+0],pv,third,val);
|
|
printf("%c",val); //(in[i + 1] >> 2) + 32);
|
|
}
|
|
if (i + 2 < filesize) {
|
|
val=in[i+2];
|
|
pv=val;
|
|
val=val+0x40;
|
|
val-=(third>>4);
|
|
// val&=0xff;
|
|
val=val>>2;
|
|
val=val+32;
|
|
final=((val-32)<<2)+(third>>4)-0x40;
|
|
fprintf(stderr,"%d: %x -> %x %x ==> %x\n",
|
|
i+2,pv,val,third>>4,final);
|
|
if (pv!=final) fprintf(stderr,"error2: no match!\n");
|
|
if (val<0) fprintf(stderr,"error2, negative! %x %x\n",
|
|
in[i+0]&0xfc,third);
|
|
if (val<0x20) fprintf(stderr,"error2, unprintable! %x %x\n",
|
|
in[i+0]&0xfc,third);
|
|
if (val>0x7e) fprintf(stderr,"error2 too big! in=%x pv=%x e=%x val=%x\n",
|
|
in[i+0],pv,third,val);
|
|
printf("%c",val);//(in[i + 2] >> 2) + 32);
|
|
}
|
|
} while ((i += 3) < filesize);
|
|
enc[e]=0;
|
|
|
|
printf("%s\n",enc);
|
|
printf("2FORI=0TO%d:POKE768+I,4*PEEK(2054+I)-192+(PEEK(%d+I/3)-32)/4^(I-INT(I/3)*3):NEXT:CALL768\n",
|
|
filesize,2054+filesize);
|
|
// printf("2FORI=0TO%d:C=(PEEK(%d+I/3)-32)/4^(I-INT(I/3)*3):POKE768+I,C+4*(PEEK(2054+I)-32-INT(C/4)):NEXT:CALL768\n",
|
|
// filesize,2054+filesize);
|
|
|
|
// note, peek/poke truncate?
|
|
//2FORI=1013TO1141:C=(PEEK(1843+I/3)-32)/4^(I-INT(I/3)*3):POKEI,C+4*(PEEK(1041+I)-32-INT(C/4)):NEXT:&
|
|
|
|
// from Tom Greene @txgx42
|
|
//1FORI=0TO141:POKE1013+I,4*PEEK(2126+I)-192+(PEEK(2267+I/3)-35)/4^(I-INT(I/3)*3):NEXT
|
|
//2&",clV5QfWo3NQegoQoX&VPYo8,kYf]J+Y_60T9jb`6dkio^o<\2g000000?0003600L100?H0,B6$-<$I1.I<-?0..?-?0:O@):1K0O):1I7033N30H3-0012345.699<>7<<998654321S4J@M$K$DJ;3%#,1E##'##&*3SS+5[5+F'F//#W##E+D+%#
|
|
|
|
return 0;
|
|
}
|