filetype detect_type(FILE *infile) {
if (ist64(infile))
return t64;
if (isp00(infile))
return p00;
if (isprg(infile))
return prg;
return not_a_valid_file;
}
int get_entry_info(int count, FILE *infile, struct program_block_info *info, unsigned int* offset) {
unsigned char byte;
int power;
if (!ist64(infile))
return 0;
if ((count < 1) || (count > get_total_entries(infile)))
return 0;
if (fseek(infile, 32 + 32 * count, SEEK_SET) != 0)
return 0;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
if (byte != 1)
return 0;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
if (byte == 0)
return 0;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
info->start = byte;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
info->start += byte * 256;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
info->end = byte;
if (fread(&byte, 1, 1, infile) < 1)
return 0;
info->end += byte * 256;
if (fseek(infile, 2, SEEK_CUR) != 0)
return 0;
*offset = 0;
for (power = 0; power <= 3; power++) {
if (fread(&byte, 1, 1, infile) < 1)
return 0;
*offset += byte << 8 * power;
}
if (fseek(infile, 4, SEEK_CUR) != 0)
return 0;
if (fread(info->name, 16, 1, infile) < 1)
return 0;
info->name[16] = 0;
return 1;
}
filetype detect_type(int ingresso){
if (ist64(ingresso)) return t64;
if (isp00(ingresso)) return p00;
if (isprg(ingresso)) return prg;
return not_a_valid_file;
}
