mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-11-30 02:00:19 +00:00
91774fc936
Uses github.com/libopenstorage/secrets to communicate with Vault. This removes the need for maintaining our own limited Vault APIs. By adding the new dependency, several other packages got updated in the process. Unused indirect dependencies have been removed from go.mod. Signed-off-by: Niels de Vos <ndevos@redhat.com>
91 lines
2.4 KiB
Markdown
91 lines
2.4 KiB
Markdown
# lz4 : LZ4 compression in pure Go
|
|
|
|
[](https://godoc.org/github.com/pierrec/lz4)
|
|
[](https://travis-ci.org/pierrec/lz4)
|
|
[](https://goreportcard.com/report/github.com/pierrec/lz4)
|
|
[](https://github.com/pierrec/lz4/tags)
|
|
|
|
## Overview
|
|
|
|
This package provides a streaming interface to [LZ4 data streams](http://fastcompression.blogspot.fr/2013/04/lz4-streaming-format-final.html) as well as low level compress and uncompress functions for LZ4 data blocks.
|
|
The implementation is based on the reference C [one](https://github.com/lz4/lz4).
|
|
|
|
## Install
|
|
|
|
Assuming you have the go toolchain installed:
|
|
|
|
```
|
|
go get github.com/pierrec/lz4
|
|
```
|
|
|
|
There is a command line interface tool to compress and decompress LZ4 files.
|
|
|
|
```
|
|
go install github.com/pierrec/lz4/cmd/lz4c
|
|
```
|
|
|
|
Usage
|
|
|
|
```
|
|
Usage of lz4c:
|
|
-version
|
|
print the program version
|
|
|
|
Subcommands:
|
|
Compress the given files or from stdin to stdout.
|
|
compress [arguments] [<file name> ...]
|
|
-bc
|
|
enable block checksum
|
|
-l int
|
|
compression level (0=fastest)
|
|
-sc
|
|
disable stream checksum
|
|
-size string
|
|
block max size [64K,256K,1M,4M] (default "4M")
|
|
|
|
Uncompress the given files or from stdin to stdout.
|
|
uncompress [arguments] [<file name> ...]
|
|
|
|
```
|
|
|
|
|
|
## Example
|
|
|
|
```
|
|
// Compress and uncompress an input string.
|
|
s := "hello world"
|
|
r := strings.NewReader(s)
|
|
|
|
// The pipe will uncompress the data from the writer.
|
|
pr, pw := io.Pipe()
|
|
zw := lz4.NewWriter(pw)
|
|
zr := lz4.NewReader(pr)
|
|
|
|
go func() {
|
|
// Compress the input string.
|
|
_, _ = io.Copy(zw, r)
|
|
_ = zw.Close() // Make sure the writer is closed
|
|
_ = pw.Close() // Terminate the pipe
|
|
}()
|
|
|
|
_, _ = io.Copy(os.Stdout, zr)
|
|
|
|
// Output:
|
|
// hello world
|
|
```
|
|
|
|
## Contributing
|
|
|
|
Contributions are very welcome for bug fixing, performance improvements...!
|
|
|
|
- Open an issue with a proper description
|
|
- Send a pull request with appropriate test case(s)
|
|
|
|
## Contributors
|
|
|
|
Thanks to all [contributors](https://github.com/pierrec/lz4/graphs/contributors) so far!
|
|
|
|
Special thanks to [@Zariel](https://github.com/Zariel) for his asm implementation of the decoder.
|
|
|
|
Special thanks to [@klauspost](https://github.com/klauspost) for his work on optimizing the code.
|