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package lz4_test
import (
"fmt"
"io"
"os"
"strings"
"github.com/pierrec/lz4"
)
func 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
}
func ExampleCompressBlock() {
s := "hello world"
data := []byte(strings.Repeat(s, 100))
buf := make([]byte, len(data))
ht := make([]int, 64<<10) // buffer for the compression table
n, err := lz4.CompressBlock(data, buf, ht)
if err != nil {
fmt.Println(err)
}
if n >= len(data) {
fmt.Printf("`%s` is not compressible", s)
}
buf = buf[:n] // compressed data
// Allocated a very large buffer for decompression.
out := make([]byte, 10*len(data))
n, err = lz4.UncompressBlock(buf, out)
if err != nil {
fmt.Println(err)
}
out = out[:n] // uncompressed data
fmt.Println(string(out[:len(s)]))
// Output:
// hello world
}
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