string_to_int.go (4856B)
1 package pflag 2 3 import ( 4 "bytes" 5 "fmt" 6 "strconv" 7 "strings" 8 ) 9 10 // -- stringToInt Value 11 type stringToIntValue struct { 12 value *map[string]int 13 changed bool 14 } 15 16 func newStringToIntValue(val map[string]int, p *map[string]int) *stringToIntValue { 17 ssv := new(stringToIntValue) 18 ssv.value = p 19 *ssv.value = val 20 return ssv 21 } 22 23 // Format: a=1,b=2 24 func (s *stringToIntValue) Set(val string) error { 25 ss := strings.Split(val, ",") 26 out := make(map[string]int, len(ss)) 27 for _, pair := range ss { 28 kv := strings.SplitN(pair, "=", 2) 29 if len(kv) != 2 { 30 return fmt.Errorf("%s must be formatted as key=value", pair) 31 } 32 var err error 33 out[kv[0]], err = strconv.Atoi(kv[1]) 34 if err != nil { 35 return err 36 } 37 } 38 if !s.changed { 39 *s.value = out 40 } else { 41 for k, v := range out { 42 (*s.value)[k] = v 43 } 44 } 45 s.changed = true 46 return nil 47 } 48 49 func (s *stringToIntValue) Type() string { 50 return "stringToInt" 51 } 52 53 func (s *stringToIntValue) String() string { 54 var buf bytes.Buffer 55 i := 0 56 for k, v := range *s.value { 57 if i > 0 { 58 buf.WriteRune(',') 59 } 60 buf.WriteString(k) 61 buf.WriteRune('=') 62 buf.WriteString(strconv.Itoa(v)) 63 i++ 64 } 65 return "[" + buf.String() + "]" 66 } 67 68 func stringToIntConv(val string) (interface{}, error) { 69 val = strings.Trim(val, "[]") 70 // An empty string would cause an empty map 71 if len(val) == 0 { 72 return map[string]int{}, nil 73 } 74 ss := strings.Split(val, ",") 75 out := make(map[string]int, len(ss)) 76 for _, pair := range ss { 77 kv := strings.SplitN(pair, "=", 2) 78 if len(kv) != 2 { 79 return nil, fmt.Errorf("%s must be formatted as key=value", pair) 80 } 81 var err error 82 out[kv[0]], err = strconv.Atoi(kv[1]) 83 if err != nil { 84 return nil, err 85 } 86 } 87 return out, nil 88 } 89 90 // GetStringToInt return the map[string]int value of a flag with the given name 91 func (f *FlagSet) GetStringToInt(name string) (map[string]int, error) { 92 val, err := f.getFlagType(name, "stringToInt", stringToIntConv) 93 if err != nil { 94 return map[string]int{}, err 95 } 96 return val.(map[string]int), nil 97 } 98 99 // StringToIntVar defines a string flag with specified name, default value, and usage string. 100 // The argument p points to a map[string]int variable in which to store the values of the multiple flags. 101 // The value of each argument will not try to be separated by comma 102 func (f *FlagSet) StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) { 103 f.VarP(newStringToIntValue(value, p), name, "", usage) 104 } 105 106 // StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash. 107 func (f *FlagSet) StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) { 108 f.VarP(newStringToIntValue(value, p), name, shorthand, usage) 109 } 110 111 // StringToIntVar defines a string flag with specified name, default value, and usage string. 112 // The argument p points to a map[string]int variable in which to store the value of the flag. 113 // The value of each argument will not try to be separated by comma 114 func StringToIntVar(p *map[string]int, name string, value map[string]int, usage string) { 115 CommandLine.VarP(newStringToIntValue(value, p), name, "", usage) 116 } 117 118 // StringToIntVarP is like StringToIntVar, but accepts a shorthand letter that can be used after a single dash. 119 func StringToIntVarP(p *map[string]int, name, shorthand string, value map[string]int, usage string) { 120 CommandLine.VarP(newStringToIntValue(value, p), name, shorthand, usage) 121 } 122 123 // StringToInt defines a string flag with specified name, default value, and usage string. 124 // The return value is the address of a map[string]int variable that stores the value of the flag. 125 // The value of each argument will not try to be separated by comma 126 func (f *FlagSet) StringToInt(name string, value map[string]int, usage string) *map[string]int { 127 p := map[string]int{} 128 f.StringToIntVarP(&p, name, "", value, usage) 129 return &p 130 } 131 132 // StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash. 133 func (f *FlagSet) StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int { 134 p := map[string]int{} 135 f.StringToIntVarP(&p, name, shorthand, value, usage) 136 return &p 137 } 138 139 // StringToInt defines a string flag with specified name, default value, and usage string. 140 // The return value is the address of a map[string]int variable that stores the value of the flag. 141 // The value of each argument will not try to be separated by comma 142 func StringToInt(name string, value map[string]int, usage string) *map[string]int { 143 return CommandLine.StringToIntP(name, "", value, usage) 144 } 145 146 // StringToIntP is like StringToInt, but accepts a shorthand letter that can be used after a single dash. 147 func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int { 148 return CommandLine.StringToIntP(name, shorthand, value, usage) 149 }