membase 0.2.1

Ultra-high performance async runtime with fast task cycling, lock-free scheduling, and zero-overhead performance
Documentation 
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//! Compression support for columnar database.
#![allow(unused_variables)]
use std::io;

/// Compression types supported by the columnar database.
#[repr(u32)]
#[derive(Debug, Clone, Copy, PartialEq, Eq)]
pub enum CompressionType {
    /// No compression
    None = 0,
    
    /// LZ4 compression
    LZ4 = 1,
    
    /// Zstd compression
    Zstd = 2,
    
    /// Snappy compression
    Snappy = 3,
    
    /// Dictionary encoding
    Dictionary = 4,
    
    /// Run-length encoding
    RunLength = 5,
    
    /// Delta encoding
    Delta = 6,
    
    /// Bit-packing
    BitPacking = 7,
}

/// Trait for compression algorithms.
pub trait Compression {
    /// Compress data.
    fn compress(&self, data: &[u8]) -> io::Result<Vec<u8>>;
    
    /// Decompress data.
    fn decompress(&self, data: &[u8], decompressed_size: usize) -> io::Result<Vec<u8>>;
    
    /// Get the compression type.
    fn compression_type(&self) -> CompressionType;
}

/// No compression.
pub struct NoCompression;

impl Compression for NoCompression {
    fn compress(&self, data: &[u8]) -> io::Result<Vec<u8>> {
        Ok(data.to_vec())
    }
    
    fn decompress(&self, data: &[u8], _decompressed_size: usize) -> io::Result<Vec<u8>> {
        Ok(data.to_vec())
    }
    
    fn compression_type(&self) -> CompressionType {
        CompressionType::None
    }
}

// Note: In a real implementation, you would add implementations for other
// compression algorithms like LZ4, Zstd, Snappy, etc.