1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
// Copyright 2012 Google, Inc. All rights reserved.
//
// Use of this source code is governed by a BSD-style license
// that can be found in the LICENSE file in the root of the source
// tree.
package gopacket
import (
"fmt"
"testing"
)
func TestExponentialSizeIncreasePrepend(t *testing.T) {
var b serializeBuffer
for i, test := range []struct {
prepend, size int
}{
{2, 2},
{2, 4},
{2, 8},
{2, 8},
{2, 16},
{2, 16},
{2, 16},
{2, 16},
{2, 32},
} {
b.PrependBytes(test.prepend)
if test.size != cap(b.data) {
t.Error(i, "size want", test.size, "got", cap(b.data))
}
}
b.Clear()
if b.start != 32 {
t.Error(b.start)
}
}
func TestExponentialSizeIncreaseAppend(t *testing.T) {
var b serializeBuffer
for i, test := range []struct {
appnd, size int
}{
{2, 2},
{2, 4},
{2, 8},
{2, 8},
{2, 16},
{2, 16},
{2, 16},
{2, 16},
{2, 32},
} {
b.AppendBytes(test.appnd)
if test.size != cap(b.data) {
t.Error(i, "size want", test.size, "got", cap(b.data))
}
}
b.Clear()
if b.start != 0 {
t.Error(b.start)
}
}
func ExampleSerializeBuffer() {
b := NewSerializeBuffer()
fmt.Println("1:", b.Bytes())
bytes, _ := b.PrependBytes(3)
copy(bytes, []byte{1, 2, 3})
fmt.Println("2:", b.Bytes())
bytes, _ = b.AppendBytes(2)
copy(bytes, []byte{4, 5})
fmt.Println("3:", b.Bytes())
bytes, _ = b.PrependBytes(1)
copy(bytes, []byte{0})
fmt.Println("4:", b.Bytes())
bytes, _ = b.AppendBytes(3)
copy(bytes, []byte{6, 7, 8})
fmt.Println("5:", b.Bytes())
b.Clear()
fmt.Println("6:", b.Bytes())
bytes, _ = b.PrependBytes(2)
copy(bytes, []byte{9, 9})
fmt.Println("7:", b.Bytes())
// Output:
// 1: []
// 2: [1 2 3]
// 3: [1 2 3 4 5]
// 4: [0 1 2 3 4 5]
// 5: [0 1 2 3 4 5 6 7 8]
// 6: []
// 7: [9 9]
}
|
