Module compression 

Simple compression utilities for integer data

Implements Run-Length Encoding (RLE) combined with VByte and ZigZag encoding for efficient storage of sparse integer data (like wavelet coefficients).

Functions

compress_rle

Compress a slice of i32 using RLE + ZigZag + VByte Format:

decode_vbyte

Decode a u32 using VByte encoding

decompress_rle

Decompress RLE data to Vec expected_len is the expected number of integers (optional check)

encode_vbyte

Encode a u32 using VByte (variable length) encoding Returns the number of bytes written

zigzag_decode

ZigZag decode an unsigned integer to signed

zigzag_encode

ZigZag encode a signed integer to unsigned Maps small signed integers to small unsigned integers 0 -> 0, -1 -> 1, 1 -> 2, -2 -> 3, …