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bytes.go (7169B)

      1 package pflag
      2 
      3 import (
      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
     11 type bytesHexValue []byte
     12 
     13 // String implements pflag.Value.String.
     14 func (bytesHex bytesHexValue) String() string {
     15 	return fmt.Sprintf("%X", []byte(bytesHex))
     16 }
     17 
     18 // Set implements pflag.Value.Set.
     19 func (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.
     32 func (*bytesHexValue) Type() string {
     33 	return "bytesHex"
     34 }
     35 
     36 func newBytesHexValue(val []byte, p *[]byte) *bytesHexValue {
     37 	*p = val
     38 	return (*bytesHexValue)(p)
     39 }
     40 
     41 func 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
     53 func (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.
     65 func (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.
     70 func (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.
     76 func 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.
     81 func 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.
     87 func (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.
     94 func (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.
    102 func 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.
    107 func 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
    112 type bytesBase64Value []byte
    113 
    114 // String implements pflag.Value.String.
    115 func (bytesBase64 bytesBase64Value) String() string {
    116 	return base64.StdEncoding.EncodeToString([]byte(bytesBase64))
    117 }
    118 
    119 // Set implements pflag.Value.Set.
    120 func (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.
    133 func (*bytesBase64Value) Type() string {
    134 	return "bytesBase64"
    135 }
    136 
    137 func newBytesBase64Value(val []byte, p *[]byte) *bytesBase64Value {
    138 	*p = val
    139 	return (*bytesBase64Value)(p)
    140 }
    141 
    142 func 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
    153 func (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.
    165 func (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.
    170 func (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.
    176 func 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.
    181 func 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.
    187 func (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.
    194 func (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.
    202 func 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.
    207 func BytesBase64P(name, shorthand string, value []byte, usage string) *[]byte {
    208 	return CommandLine.BytesBase64P(name, shorthand, value, usage)
    209 }