Returns -1 in case of error.

Return the total size of usual and Unicode characters stored in the list.

We do not want to cast every signed char to unsigned when passing to isalpha, so we implement the replacement. Shall work for Unicode too. If chars ar

Calculate RAR_MEM_BLK+Items address. Real RAR_MEM_BLK size must be equal to UNIT_SIZE, so we cannot just add Items to RAR_MEM_BLK address.

LengthTable contains the length in bits for every element of alphabet. Dec is the structure to decode Huffman code/ Size is size of length table and D