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int_slice.go (4331B)

      1 package pflag
      2 
      3 import (
      4 	"fmt"
      5 	"strconv"
      6 	"strings"
      7 )
      8 
      9 // -- intSlice Value
     10 type intSliceValue struct {
     11 	value   *[]int
     12 	changed bool
     13 }
     14 
     15 func newIntSliceValue(val []int, p *[]int) *intSliceValue {
     16 	isv := new(intSliceValue)
     17 	isv.value = p
     18 	*isv.value = val
     19 	return isv
     20 }
     21 
     22 func (s *intSliceValue) Set(val string) error {
     23 	ss := strings.Split(val, ",")
     24 	out := make([]int, len(ss))
     25 	for i, d := range ss {
     26 		var err error
     27 		out[i], err = strconv.Atoi(d)
     28 		if err != nil {
     29 			return err
     30 		}
     31 
     32 	}
     33 	if !s.changed {
     34 		*s.value = out
     35 	} else {
     36 		*s.value = append(*s.value, out...)
     37 	}
     38 	s.changed = true
     39 	return nil
     40 }
     41 
     42 func (s *intSliceValue) Type() string {
     43 	return "intSlice"
     44 }
     45 
     46 func (s *intSliceValue) String() string {
     47 	out := make([]string, len(*s.value))
     48 	for i, d := range *s.value {
     49 		out[i] = fmt.Sprintf("%d", d)
     50 	}
     51 	return "[" + strings.Join(out, ",") + "]"
     52 }
     53 
     54 func (s *intSliceValue) Append(val string) error {
     55 	i, err := strconv.Atoi(val)
     56 	if err != nil {
     57 		return err
     58 	}
     59 	*s.value = append(*s.value, i)
     60 	return nil
     61 }
     62 
     63 func (s *intSliceValue) Replace(val []string) error {
     64 	out := make([]int, len(val))
     65 	for i, d := range val {
     66 		var err error
     67 		out[i], err = strconv.Atoi(d)
     68 		if err != nil {
     69 			return err
     70 		}
     71 	}
     72 	*s.value = out
     73 	return nil
     74 }
     75 
     76 func (s *intSliceValue) GetSlice() []string {
     77 	out := make([]string, len(*s.value))
     78 	for i, d := range *s.value {
     79 		out[i] = strconv.Itoa(d)
     80 	}
     81 	return out
     82 }
     83 
     84 func intSliceConv(val string) (interface{}, error) {
     85 	val = strings.Trim(val, "[]")
     86 	// Empty string would cause a slice with one (empty) entry
     87 	if len(val) == 0 {
     88 		return []int{}, nil
     89 	}
     90 	ss := strings.Split(val, ",")
     91 	out := make([]int, len(ss))
     92 	for i, d := range ss {
     93 		var err error
     94 		out[i], err = strconv.Atoi(d)
     95 		if err != nil {
     96 			return nil, err
     97 		}
     98 
     99 	}
    100 	return out, nil
    101 }
    102 
    103 // GetIntSlice return the []int value of a flag with the given name
    104 func (f *FlagSet) GetIntSlice(name string) ([]int, error) {
    105 	val, err := f.getFlagType(name, "intSlice", intSliceConv)
    106 	if err != nil {
    107 		return []int{}, err
    108 	}
    109 	return val.([]int), nil
    110 }
    111 
    112 // IntSliceVar defines a intSlice flag with specified name, default value, and usage string.
    113 // The argument p points to a []int variable in which to store the value of the flag.
    114 func (f *FlagSet) IntSliceVar(p *[]int, name string, value []int, usage string) {
    115 	f.VarP(newIntSliceValue(value, p), name, "", usage)
    116 }
    117 
    118 // IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
    119 func (f *FlagSet) IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
    120 	f.VarP(newIntSliceValue(value, p), name, shorthand, usage)
    121 }
    122 
    123 // IntSliceVar defines a int[] flag with specified name, default value, and usage string.
    124 // The argument p points to a int[] variable in which to store the value of the flag.
    125 func IntSliceVar(p *[]int, name string, value []int, usage string) {
    126 	CommandLine.VarP(newIntSliceValue(value, p), name, "", usage)
    127 }
    128 
    129 // IntSliceVarP is like IntSliceVar, but accepts a shorthand letter that can be used after a single dash.
    130 func IntSliceVarP(p *[]int, name, shorthand string, value []int, usage string) {
    131 	CommandLine.VarP(newIntSliceValue(value, p), name, shorthand, usage)
    132 }
    133 
    134 // IntSlice defines a []int flag with specified name, default value, and usage string.
    135 // The return value is the address of a []int variable that stores the value of the flag.
    136 func (f *FlagSet) IntSlice(name string, value []int, usage string) *[]int {
    137 	p := []int{}
    138 	f.IntSliceVarP(&p, name, "", value, usage)
    139 	return &p
    140 }
    141 
    142 // IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
    143 func (f *FlagSet) IntSliceP(name, shorthand string, value []int, usage string) *[]int {
    144 	p := []int{}
    145 	f.IntSliceVarP(&p, name, shorthand, value, usage)
    146 	return &p
    147 }
    148 
    149 // IntSlice defines a []int flag with specified name, default value, and usage string.
    150 // The return value is the address of a []int variable that stores the value of the flag.
    151 func IntSlice(name string, value []int, usage string) *[]int {
    152 	return CommandLine.IntSliceP(name, "", value, usage)
    153 }
    154 
    155 // IntSliceP is like IntSlice, but accepts a shorthand letter that can be used after a single dash.
    156 func IntSliceP(name, shorthand string, value []int, usage string) *[]int {
    157 	return CommandLine.IntSliceP(name, shorthand, value, usage)
    158 }