sd2snes/utils/derle.c
2011-02-08 01:06:01 +01:00

46 lines
870 B
C

#include <stdio.h>
#include <fcntl.h>
#include <stdint.h>
FILE *in, *out;
uint8_t data;
uint16_t len;
int main(int argc, char** argv) {
if((in=fopen(argv[1], "rb"))==NULL) {
perror("could not open input file");
return 1;
}
if((out=fopen(argv[2], "wb"))==NULL) {
perror("could not open output file");
fclose(in);
return 1;
}
len=0;
while(!feof(in)) {
data=fgetc(in);
if(feof(in))break;
switch(data) {
case 0x9b:
fputc(fgetc(in), out);
break;
case 0x5b:
data=fgetc(in);
len=fgetc(in);
while(len--)fputc(data, out);
break;
case 0x77:
data=fgetc(in);
len = fgetc(in);
len |= fgetc(in) << 8;
while(len--)fputc(data, out);
break;
default:
fputc(data, out);
}
}
fclose(out);
fclose(in);
return 0;
}