CBHCompressKit
CBHCompressKit provides CBHCompressor and CBHDecompressor which provide an easy-to-use means of compressing NSData. They support one-call and stream compression. Additionally CBHCompressKit provides a NSData category to make one-call compression even easier.
Supported Algorithms:
- LZ4: A high-speed compression algorithm.
- LZMA: A high compression ratio algorithm.
- ZLib: A balanced, cross platform compression algorithm/format.
- LZFSE: A balanced, Apple only compression algorithm.
Use
Most use cases will only need to use the NSData categories.
Examples:
Compress NSData with LZ4:
NSData *data = /* some data */
NSData *compressed = [data compressUsingLZ4];Decompress NSData with LZ4:
NSData *compressed = /* some compressed data */
NSData *data = [compressed decompressUsingLZ4];Compress NSData with LZMA:
NSData *data = /* some data */
NSData *compressed = [data compressUsingLZMA];Decompress NSData with LZMA:
NSData *compressed = /* some compressed data */
NSData *data = [compressed decompressUsingLZMA];Compress NSData with ZLib:
NSData *data = /* some data */
NSData *compressed = [data compressUsingZLib];Decompress NSData with ZLib:
NSData *compressed = /* some compressed data */
NSData *data = [compressed decompressUsingZLib];Compress NSData with LZFSE:
NSData *data = /* some data */
NSData *compressed = [data compressUsingLZFSE];Decompress NSData with LZFSE:
NSData *compressed = /* some compressed data */
NSData *data = [compressed decompressUsingLZFSE];More complicated examples such as with a stream.
Examples:
Compress a stream:
id io = /* an object that returns data in chunks */
CBHCompressAlgorithm algorithm = CBHCompressAlgorithm_LZMA;
NSData *compressed = [CBHCompressor compressUsingAlgorithm:algorithm inBlock:^(CBHCompressor *compressor) {
while ( [io hasMoreData] )
{
[compressor appendData:[io data]];
}
}];Decompress a stream:
id io = /* an object that returns data in chunks */
CBHCompressAlgorithm algorithm = CBHCompressAlgorithm_LZMA;
NSData *decompressed = [CBHDecompressor decompressUsingAlgorithm:algorithm inBlock:^(CBHDecompressor *decompressor) {
while ( [io hasMoreData] )
{
[decompressor appendData:[io data]];
}
}];Licence
CBHCompressKit is available under the ISC license.