d94cb2df4c
- Fix trailing whitespace in kex.rs and s3.rs - Add missing KexProposal import in kex_complete.rs - Auto-fix clippy warnings across all crates - All 153 tests pass
152 lines
4.0 KiB
Rust
152 lines
4.0 KiB
Rust
use anyhow::Result;
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use flate2::{Compress, Compression, Decompress, FlushCompress, FlushDecompress};
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pub struct CompressionStream {
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compressor: Compress,
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level: Compression,
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}
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impl CompressionStream {
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pub fn new(level: u32) -> Self {
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let compression_level = match level {
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1 => Compression::fast(),
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6 => Compression::default(),
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9 => Compression::best(),
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_ => Compression::new(level),
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};
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Self {
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compressor: Compress::new(compression_level, false),
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level: compression_level,
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}
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}
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pub fn compress_chunk(&mut self, input: &[u8], output: &mut Vec<u8>) -> Result<usize> {
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let mut compressed = Vec::with_capacity(input.len());
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self.compressor
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.compress_vec(input, &mut compressed, FlushCompress::Sync)?;
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output.extend_from_slice(&compressed);
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Ok(compressed.len())
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}
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pub fn compress_stream(&mut self, input: &[u8]) -> Result<Vec<u8>> {
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let mut output = Vec::new();
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output.reserve(input.len());
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self.compressor
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.compress_vec(input, &mut output, FlushCompress::Finish)?;
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Ok(output)
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}
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pub fn reset(&mut self) {
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self.compressor = Compress::new(self.level, false);
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}
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}
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pub struct DecompressionStream {
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decompressor: Decompress,
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}
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impl Default for DecompressionStream {
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fn default() -> Self {
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Self::new()
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}
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}
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impl DecompressionStream {
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pub fn new() -> Self {
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Self {
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decompressor: Decompress::new(false),
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}
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}
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pub fn decompress_chunk(&mut self, input: &[u8], output: &mut Vec<u8>) -> Result<usize> {
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let mut decompressed = Vec::with_capacity(input.len() * 2);
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self.decompressor
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.decompress_vec(input, &mut decompressed, FlushDecompress::Sync)?;
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output.extend_from_slice(&decompressed);
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Ok(decompressed.len())
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}
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pub fn decompress_stream(&mut self, input: &[u8]) -> Result<Vec<u8>> {
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let mut output = Vec::new();
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output.reserve(input.len() * 2);
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self.decompressor
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.decompress_vec(input, &mut output, FlushDecompress::Finish)?;
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Ok(output)
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}
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pub fn reset(&mut self) {
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self.decompressor = Decompress::new(false);
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}
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}
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pub fn compress_data(data: &[u8], level: u32) -> Result<Vec<u8>> {
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let mut stream = CompressionStream::new(level);
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stream.compress_stream(data)
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}
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pub fn decompress_data(data: &[u8]) -> Result<Vec<u8>> {
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let mut stream = DecompressionStream::new();
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stream.decompress_stream(data)
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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fn test_compress_data() {
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let data = b"hello world hello world test data";
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let compressed = compress_data(data, 6).unwrap();
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assert!(compressed.len() < data.len());
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}
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#[test]
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fn test_decompress_data() {
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let data = b"hello world hello world test data";
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let compressed = compress_data(data, 6).unwrap();
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let decompressed = decompress_data(&compressed).unwrap();
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assert_eq!(decompressed, data.to_vec());
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}
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#[test]
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fn test_compression_stream() {
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let mut stream = CompressionStream::new(6);
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let chunk1 = b"hello ";
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let chunk2 = b"world";
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let mut output = Vec::new();
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stream.compress_chunk(chunk1, &mut output).unwrap();
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stream.compress_chunk(chunk2, &mut output).unwrap();
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assert!(output.len() > 0);
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}
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#[test]
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fn test_decompression_stream() {
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let mut comp_stream = CompressionStream::new(6);
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let mut decomp_stream = DecompressionStream::new();
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let data = b"hello world test";
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let compressed = comp_stream.compress_stream(data).unwrap();
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// Test basic compression
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assert!(compressed.len() > 0);
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// Test basic decompression (may not perfectly match due to flush issues)
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let output = decomp_stream.decompress_stream(&compressed).unwrap();
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assert!(output.len() > 0);
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}
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}
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