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package gozstd
import (
"bytes"
"fmt"
"io"
"io/ioutil"
"log"
)
func ExampleReader() {
// Compress the data.
compressedData := Compress(nil, []byte("line 0\nline 1\nline 2"))
// Read it via Reader.
r := bytes.NewReader(compressedData)
zr := NewReader(r)
defer zr.Release()
var a []int
for i := 0; i < 3; i++ {
var n int
if _, err := fmt.Fscanf(zr, "line %d\n", &n); err != nil {
log.Fatalf("cannot read line: %s", err)
}
a = append(a, n)
}
// Make sure there are no data left in zr.
buf := make([]byte, 1)
if _, err := zr.Read(buf); err != io.EOF {
log.Fatalf("unexpected error; got %v; want %v", err, io.EOF)
}
fmt.Println(a)
// Output:
// [0 1 2]
}
func ExampleReader_Reset() {
zr := NewReader(nil)
defer zr.Release()
// Read from different sources using the same Reader.
for i := 0; i < 3; i++ {
compressedData := Compress(nil, []byte(fmt.Sprintf("line %d", i)))
r := bytes.NewReader(compressedData)
zr.Reset(r, nil)
data, err := ioutil.ReadAll(zr)
if err != nil {
log.Fatalf("unexpected error when reading compressed data: %s", err)
}
fmt.Printf("%s\n", data)
}
// Output:
// line 0
// line 1
// line 2
}
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