Uncompressed lengths do not match original

[WayneKeenan]

Hi, I ran a number of tests and have found that in some cases the decoded file doesn't match the original unencoded file.

For example, test "128b_null.bin":

It is a file of 128 bytes that are all 0.
It encodes to 45 bytes.
It decodes to 126 bytes.

There are other cases, e.g.: 255b_null.bin, 256b_null.bin & 2k_null.bin.

The worst case here is a 4 byte difference, i.e. 512b_null.bin where 512 bytes of 0 are encoded to 89 bytes but decodes to 508 bytes

--------------------------------------------
Testing: 1k_null.bin
Encoding is done
Decoding is done
1024 .. 117 .. 1024
--------------------------------------------
Testing: 128b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/128b_null.bin and ./test_data/uncompressed.actual/128b_null.bin differ
128 .. 45 .. 126
--------------------------------------------
Testing: 12k_0to3scale.bin
Encoding is done
Decoding is done
12288 .. 3297 .. 12288
--------------------------------------------
Testing: 12k_null.bin
Encoding is done
Decoding is done
12288 .. 227 .. 12288
--------------------------------------------
Testing: 16k_null.bin
Encoding is done
Decoding is done
16384 .. 241 .. 16384
--------------------------------------------
Testing: 1k_null.bin
Encoding is done
Decoding is done
1024 .. 117 .. 1024
--------------------------------------------
Testing: 255b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/255b_null.bin and ./test_data/uncompressed.actual/255b_null.bin differ
255 .. 65 .. 254
--------------------------------------------
Testing: 256b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/256b_null.bin and ./test_data/uncompressed.actual/256b_null.bin differ
256 .. 65 .. 254
--------------------------------------------
Testing: 2k_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/2k_null.bin and ./test_data/uncompressed.actual/2k_null.bin differ
2048 .. 146 .. 2047
--------------------------------------------
Testing: 32b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/32b_null.bin and ./test_data/uncompressed.actual/32b_null.bin differ
32 .. 19 .. 30
--------------------------------------------
Testing: 32bytes_0to3scale.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/32bytes_0to3scale.bin and ./test_data/uncompressed.actual/32bytes_0to3scale.bin differ
32 .. 26 .. 31
--------------------------------------------
Testing: 4k_null.bin
Encoding is done
Decoding is done
4096 .. 177 .. 4096
--------------------------------------------
Testing: 4k_random.bin
Encoding is done
Decoding is done
4096 .. 4146 .. 4096
--------------------------------------------
Testing: 512b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/512b_null.bin and ./test_data/uncompressed.actual/512b_null.bin differ
512 .. 89 .. 508
--------------------------------------------
Testing: 64b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/64b_null.bin and ./test_data/uncompressed.actual/64b_null.bin differ
64 .. 30 .. 63
--------------------------------------------
Testing: 768b_null.bin
Encoding is done
Decoding is done
Binary files ./test_data/uncompressed.expected/768b_null.bin and ./test_data/uncompressed.actual/768b_null.bin differ
768 .. 105 .. 767
--------------------------------------------
Testing: 8k_null.bin
Encoding is done
Decoding is done
8192 .. 209 .. 8192

[8banzhuan]

hello how to run this code with my own files？
like ./arithm-coding inputfilename outputfilename?
it just say Using: name_programm <input_of_file> <output_file>