1package pflag 2 3import ( 4 "bytes" 5 "fmt" 6 "strconv" 7 "strings" 8) 9 10// -- stringToInt Value 11type stringToIntValue struct { 12 value *map[string]int 13 changed bool 14} 15 16func 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 24func (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 49func (s *stringToIntValue) Type() string { 50 return "stringToInt" 51} 52 53func (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 68func 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 91func (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 102func (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. 107func (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 114func 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. 119func 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 126func (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. 133func (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 142func 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. 147func StringToIntP(name, shorthand string, value map[string]int, usage string) *map[string]int { 148 return CommandLine.StringToIntP(name, shorthand, value, usage) 149} 150