1package pflag
2
3import (
4 "encoding/base64"
5 "encoding/hex"
6 "fmt"
7 "strings"
8)
9
10// BytesHex adapts []byte for use as a flag. Value of flag is HEX encoded
11type bytesHexValue []byte
12
13// String implements pflag.Value.String.
14func (bytesHex bytesHexValue) String() string {
15 return fmt.Sprintf("%X", []byte(bytesHex))
16}
17
18// Set implements pflag.Value.Set.
19func (bytesHex *bytesHexValue) Set(value string) error {
20 bin, err := hex.DecodeString(strings.TrimSpace(value))
21
22 if err != nil {
23 return err
24 }
25
26 *bytesHex = bin
27
28 return nil
29}
30
31// Type implements pflag.Value.Type.
32func (*bytesHexValue) Type() string {
33 return "bytesHex"
34}
35
36func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
37 *p = val
38 return (*bytesHexValue)(p)
39}
40
41func bytesHexConv(sval string) (interface{}, error) {
42
43 bin, err := hex.DecodeString(sval)
44
45 if err == nil {
46 return bin, nil
47 }
48
49 return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
50}
51
52// GetBytesHex return the []byte value of a flag with the given name
53func (f *FlagSet) GetBytesHex(name string) ([]byte, error) {
54 val, err := f.getFlagType(name, "bytesHex", bytesHexConv)
55
56 if err != nil {
57 return []byte{}, err
58 }
59
60 return val.([]byte), nil
61}
62
63// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
64// The argument p points to an []byte variable in which to store the value of the flag.
65func (f *FlagSet) BytesHexVar(p *[]byte, name string, value []byte, usage string) {
66 f.VarP(newBytesHexValue(value, p), name, "", usage)
67}
68
69// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
70func (f *FlagSet) BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
71 f.VarP(newBytesHexValue(value, p), name, shorthand, usage)
72}
73
74// BytesHexVar defines an []byte flag with specified name, default value, and usage string.
75// The argument p points to an []byte variable in which to store the value of the flag.
76func BytesHexVar(p *[]byte, name string, value []byte, usage string) {
77 CommandLine.VarP(newBytesHexValue(value, p), name, "", usage)
78}
79
80// BytesHexVarP is like BytesHexVar, but accepts a shorthand letter that can be used after a single dash.
81func BytesHexVarP(p *[]byte, name, shorthand string, value []byte, usage string) {
82 CommandLine.VarP(newBytesHexValue(value, p), name, shorthand, usage)
83}
84
85// BytesHex defines an []byte flag with specified name, default value, and usage string.
86// The return value is the address of an []byte variable that stores the value of the flag.
87func (f *FlagSet) BytesHex(name string, value []byte, usage string) *[]byte {
88 p := new([]byte)
89 f.BytesHexVarP(p, name, "", value, usage)
90 return p
91}
92
93// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
94func (f *FlagSet) BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
95 p := new([]byte)
96 f.BytesHexVarP(p, name, shorthand, value, usage)
97 return p
98}
99
100// BytesHex defines an []byte flag with specified name, default value, and usage string.
101// The return value is the address of an []byte variable that stores the value of the flag.
102func BytesHex(name string, value []byte, usage string) *[]byte {
103 return CommandLine.BytesHexP(name, "", value, usage)
104}
105
106// BytesHexP is like BytesHex, but accepts a shorthand letter that can be used after a single dash.
107func BytesHexP(name, shorthand string, value []byte, usage string) *[]byte {
108 return CommandLine.BytesHexP(name, shorthand, value, usage)
109}
110
111// BytesBase64 adapts []byte for use as a flag. Value of flag is Base64 encoded
112type bytesBase64Value []byte
113
114// String implements pflag.Value.String.
115func (bytesBase64 bytesBase64Value) String() string {
116 return base64.StdEncoding.EncodeToString([]byte(bytesBase64))
117}
118
119// Set implements pflag.Value.Set.
120func (bytesBase64 *bytesBase64Value) Set(value string) error {
121 bin, err := base64.StdEncoding.DecodeString(strings.TrimSpace(value))
122
123 if err != nil {
124 return err
125 }
126
127 *bytesBase64 = bin
128
129 return nil
130}
131
132// Type implements pflag.Value.Type.
133func (*bytesBase64Value) Type() string {
134 return "bytesBase64"
135}
136
137func newBytesBase64Value(val []byte, p *[]byte) *bytesBase64Value {
138 *p = val
139 return (*bytesBase64Value)(p)
140}
141
142func bytesBase64ValueConv(sval string) (interface{}, error) {
143
144 bin, err := base64.StdEncoding.DecodeString(sval)
145 if err == nil {
146 return bin, nil
147 }
148
149 return nil, fmt.Errorf("invalid string being converted to Bytes: %s %s", sval, err)
150}
151
152// GetBytesBase64 return the []byte value of a flag with the given name
153func (f *FlagSet) GetBytesBase64(name string) ([]byte, error) {
154 val, err := f.getFlagType(name, "bytesBase64", bytesBase64ValueConv)
155
156 if err != nil {
157 return []byte{}, err
158 }
159
160 return val.([]byte), nil
161}
162
163// BytesBase64Var defines an []byte flag with specified name, default value, and usage string.
164// The argument p points to an []byte variable in which to store the value of the flag.
165func (f *FlagSet) BytesBase64Var(p *[]byte, name string, value []byte, usage string) {
166 f.VarP(newBytesBase64Value(value, p), name, "", usage)
167}
168
169// BytesBase64VarP is like BytesBase64Var, but accepts a shorthand letter that can be used after a single dash.
170func (f *FlagSet) BytesBase64VarP(p *[]byte, name, shorthand string, value []byte, usage string) {
171 f.VarP(newBytesBase64Value(value, p), name, shorthand, usage)
172}
173
174// BytesBase64Var defines an []byte flag with specified name, default value, and usage string.
175// The argument p points to an []byte variable in which to store the value of the flag.
176func BytesBase64Var(p *[]byte, name string, value []byte, usage string) {
177 CommandLine.VarP(newBytesBase64Value(value, p), name, "", usage)
178}
179
180// BytesBase64VarP is like BytesBase64Var, but accepts a shorthand letter that can be used after a single dash.
181func BytesBase64VarP(p *[]byte, name, shorthand string, value []byte, usage string) {
182 CommandLine.VarP(newBytesBase64Value(value, p), name, shorthand, usage)
183}
184
185// BytesBase64 defines an []byte flag with specified name, default value, and usage string.
186// The return value is the address of an []byte variable that stores the value of the flag.
187func (f *FlagSet) BytesBase64(name string, value []byte, usage string) *[]byte {
188 p := new([]byte)
189 f.BytesBase64VarP(p, name, "", value, usage)
190 return p
191}
192
193// BytesBase64P is like BytesBase64, but accepts a shorthand letter that can be used after a single dash.
194func (f *FlagSet) BytesBase64P(name, shorthand string, value []byte, usage string) *[]byte {
195 p := new([]byte)
196 f.BytesBase64VarP(p, name, shorthand, value, usage)
197 return p
198}
199
200// BytesBase64 defines an []byte flag with specified name, default value, and usage string.
201// The return value is the address of an []byte variable that stores the value of the flag.
202func BytesBase64(name string, value []byte, usage string) *[]byte {
203 return CommandLine.BytesBase64P(name, "", value, usage)
204}
205
206// BytesBase64P is like BytesBase64, but accepts a shorthand letter that can be used after a single dash.
207func BytesBase64P(name, shorthand string, value []byte, usage string) *[]byte {
208 return CommandLine.BytesBase64P(name, shorthand, value, usage)
209}