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CBHCompressKit

release pod licence coverage

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.