example_test.go

Documentation: encoding/hex

		 1  // Copyright 2016 The Go Authors. All rights reserved.
		 2  // Use of this source code is governed by a BSD-style
		 3  // license that can be found in the LICENSE file.
		 4  
		 5  package hex_test
		 6  
		 7  import (
		 8  	"encoding/hex"
		 9  	"fmt"
		10  	"log"
		11  	"os"
		12  )
		13  
		14  func ExampleEncode() {
		15  	src := []byte("Hello Gopher!")
		16  
		17  	dst := make([]byte, hex.EncodedLen(len(src)))
		18  	hex.Encode(dst, src)
		19  
		20  	fmt.Printf("%s\n", dst)
		21  
		22  	// Output:
		23  	// 48656c6c6f20476f7068657221
		24  }
		25  
		26  func ExampleDecode() {
		27  	src := []byte("48656c6c6f20476f7068657221")
		28  
		29  	dst := make([]byte, hex.DecodedLen(len(src)))
		30  	n, err := hex.Decode(dst, src)
		31  	if err != nil {
		32  		log.Fatal(err)
		33  	}
		34  
		35  	fmt.Printf("%s\n", dst[:n])
		36  
		37  	// Output:
		38  	// Hello Gopher!
		39  }
		40  
		41  func ExampleDecodeString() {
		42  	const s = "48656c6c6f20476f7068657221"
		43  	decoded, err := hex.DecodeString(s)
		44  	if err != nil {
		45  		log.Fatal(err)
		46  	}
		47  
		48  	fmt.Printf("%s\n", decoded)
		49  
		50  	// Output:
		51  	// Hello Gopher!
		52  }
		53  
		54  func ExampleDump() {
		55  	content := []byte("Go is an open source programming language.")
		56  
		57  	fmt.Printf("%s", hex.Dump(content))
		58  
		59  	// Output:
		60  	// 00000000	47 6f 20 69 73 20 61 6e	20 6f 70 65 6e 20 73 6f	|Go is an open so|
		61  	// 00000010	75 72 63 65 20 70 72 6f	67 72 61 6d 6d 69 6e 67	|urce programming|
		62  	// 00000020	20 6c 61 6e 67 75 61 67	65 2e										| language.|
		63  }
		64  
		65  func ExampleDumper() {
		66  	lines := []string{
		67  		"Go is an open source programming language.",
		68  		"\n",
		69  		"We encourage all Go users to subscribe to golang-announce.",
		70  	}
		71  
		72  	stdoutDumper := hex.Dumper(os.Stdout)
		73  
		74  	defer stdoutDumper.Close()
		75  
		76  	for _, line := range lines {
		77  		stdoutDumper.Write([]byte(line))
		78  	}
		79  
		80  	// Output:
		81  	// 00000000	47 6f 20 69 73 20 61 6e	20 6f 70 65 6e 20 73 6f	|Go is an open so|
		82  	// 00000010	75 72 63 65 20 70 72 6f	67 72 61 6d 6d 69 6e 67	|urce programming|
		83  	// 00000020	20 6c 61 6e 67 75 61 67	65 2e 0a 57 65 20 65 6e	| language..We en|
		84  	// 00000030	63 6f 75 72 61 67 65 20	61 6c 6c 20 47 6f 20 75	|courage all Go u|
		85  	// 00000040	73 65 72 73 20 74 6f 20	73 75 62 73 63 72 69 62	|sers to subscrib|
		86  	// 00000050	65 20 74 6f 20 67 6f 6c	61 6e 67 2d 61 6e 6e 6f	|e to golang-anno|
		87  	// 00000060	75 6e 63 65 2e																		|unce.|
		88  }
		89  
		90  func ExampleEncodeToString() {
		91  	src := []byte("Hello")
		92  	encodedStr := hex.EncodeToString(src)
		93  
		94  	fmt.Printf("%s\n", encodedStr)
		95  
		96  	// Output:
		97  	// 48656c6c6f
		98  }
		99
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