{

unsigned char count_byte = substitute_data[((index >> 2) & 3) + 4]

+ substitute_data[index & 3]

+ substitute_data[((index >> 4) & 3) + 8]

+ substitute_data[((unsigned char)index >> 6) + 12];

bytes[offset] = (unsigned char)(((index_data[bytes[offset] & 0xF] - count_byte) & 0xF) | 0x10 * (index_data[bytes[offset] >> 4] - count_byte));

count_byte = bytes[offset++];

index++;

return count_byte;

{

uint64_t offset = 0;

unsigned char current_byte = decrypt_byte(bytes, offset, index, index_data, substitute_data);

uint64_t current_byte_high = current_byte >> 4;

uint64_t current_byte_low = current_byte & 0xF;

if (current_byte_high == 0xF)

{

unsigned char count_byte;

do

{

count_byte = decrypt_byte(bytes, offset, index, index_data, substitute_data);

current_byte_high += count_byte;

} while (count_byte == 0xFF);

}

offset += current_byte_high;

if (offset < remaining)

{

decrypt_byte(bytes, offset, index, index_data, substitute_data);

decrypt_byte(bytes, offset, index, index_data, substitute_data);

if (current_byte_low == 0xF)

{

unsigned char count_byte;

do

{

count_byte = decrypt_byte(bytes, offset, index, index_data, substitute_data);

} while (count_byte == 0xFF);

}

}

return offset;