Here is C language source code for an adaptive arithmetic coding
library. I hope you find it useful. See the file ac.txt for more
information.
ac.txt
ac.h
ac.c
acdemo.c
Some other sites that may be of interest:
The Arithmetic Coding Page
Practical Huffman coding
ar.cod (the source code on which this package is based)
arithshiftc.c
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