We often get questions about how the deflate() and inflate() functions should be used. Users wonder when they should provide more input, when they should use more output, what to do with a Z_BUF_ERROR, how to make sure the process terminates properly

实现inflate压缩算法，结构清晰，方便裁剪，比gzip小很多。详情见www.zlib.net

Inflate algotithm for a compress/decompress function.