1package pflag
2
3import (
4	"fmt"
5	"strconv"
6	"strings"
7)
8
9// -- float32Slice Value
10type float32SliceValue struct {
11	value   *[]float32
12	changed bool
13}
14
15func newFloat32SliceValue(val []float32, p *[]float32) *float32SliceValue {
16	isv := new(float32SliceValue)
17	isv.value = p
18	*isv.value = val
19	return isv
20}
21
22func (s *float32SliceValue) Set(val string) error {
23	ss := strings.Split(val, ",")
24	out := make([]float32, len(ss))
25	for i, d := range ss {
26		var err error
27		var temp64 float64
28		temp64, err = strconv.ParseFloat(d, 32)
29		if err != nil {
30			return err
31		}
32		out[i] = float32(temp64)
33
34	}
35	if !s.changed {
36		*s.value = out
37	} else {
38		*s.value = append(*s.value, out...)
39	}
40	s.changed = true
41	return nil
42}
43
44func (s *float32SliceValue) Type() string {
45	return "float32Slice"
46}
47
48func (s *float32SliceValue) String() string {
49	out := make([]string, len(*s.value))
50	for i, d := range *s.value {
51		out[i] = fmt.Sprintf("%f", d)
52	}
53	return "[" + strings.Join(out, ",") + "]"
54}
55
56func (s *float32SliceValue) fromString(val string) (float32, error) {
57	t64, err := strconv.ParseFloat(val, 32)
58	if err != nil {
59		return 0, err
60	}
61	return float32(t64), nil
62}
63
64func (s *float32SliceValue) toString(val float32) string {
65	return fmt.Sprintf("%f", val)
66}
67
68func (s *float32SliceValue) Append(val string) error {
69	i, err := s.fromString(val)
70	if err != nil {
71		return err
72	}
73	*s.value = append(*s.value, i)
74	return nil
75}
76
77func (s *float32SliceValue) Replace(val []string) error {
78	out := make([]float32, len(val))
79	for i, d := range val {
80		var err error
81		out[i], err = s.fromString(d)
82		if err != nil {
83			return err
84		}
85	}
86	*s.value = out
87	return nil
88}
89
90func (s *float32SliceValue) GetSlice() []string {
91	out := make([]string, len(*s.value))
92	for i, d := range *s.value {
93		out[i] = s.toString(d)
94	}
95	return out
96}
97
98func float32SliceConv(val string) (interface{}, error) {
99	val = strings.Trim(val, "[]")
100	// Empty string would cause a slice with one (empty) entry
101	if len(val) == 0 {
102		return []float32{}, nil
103	}
104	ss := strings.Split(val, ",")
105	out := make([]float32, len(ss))
106	for i, d := range ss {
107		var err error
108		var temp64 float64
109		temp64, err = strconv.ParseFloat(d, 32)
110		if err != nil {
111			return nil, err
112		}
113		out[i] = float32(temp64)
114
115	}
116	return out, nil
117}
118
119// GetFloat32Slice return the []float32 value of a flag with the given name
120func (f *FlagSet) GetFloat32Slice(name string) ([]float32, error) {
121	val, err := f.getFlagType(name, "float32Slice", float32SliceConv)
122	if err != nil {
123		return []float32{}, err
124	}
125	return val.([]float32), nil
126}
127
128// Float32SliceVar defines a float32Slice flag with specified name, default value, and usage string.
129// The argument p points to a []float32 variable in which to store the value of the flag.
130func (f *FlagSet) Float32SliceVar(p *[]float32, name string, value []float32, usage string) {
131	f.VarP(newFloat32SliceValue(value, p), name, "", usage)
132}
133
134// Float32SliceVarP is like Float32SliceVar, but accepts a shorthand letter that can be used after a single dash.
135func (f *FlagSet) Float32SliceVarP(p *[]float32, name, shorthand string, value []float32, usage string) {
136	f.VarP(newFloat32SliceValue(value, p), name, shorthand, usage)
137}
138
139// Float32SliceVar defines a float32[] flag with specified name, default value, and usage string.
140// The argument p points to a float32[] variable in which to store the value of the flag.
141func Float32SliceVar(p *[]float32, name string, value []float32, usage string) {
142	CommandLine.VarP(newFloat32SliceValue(value, p), name, "", usage)
143}
144
145// Float32SliceVarP is like Float32SliceVar, but accepts a shorthand letter that can be used after a single dash.
146func Float32SliceVarP(p *[]float32, name, shorthand string, value []float32, usage string) {
147	CommandLine.VarP(newFloat32SliceValue(value, p), name, shorthand, usage)
148}
149
150// Float32Slice defines a []float32 flag with specified name, default value, and usage string.
151// The return value is the address of a []float32 variable that stores the value of the flag.
152func (f *FlagSet) Float32Slice(name string, value []float32, usage string) *[]float32 {
153	p := []float32{}
154	f.Float32SliceVarP(&p, name, "", value, usage)
155	return &p
156}
157
158// Float32SliceP is like Float32Slice, but accepts a shorthand letter that can be used after a single dash.
159func (f *FlagSet) Float32SliceP(name, shorthand string, value []float32, usage string) *[]float32 {
160	p := []float32{}
161	f.Float32SliceVarP(&p, name, shorthand, value, usage)
162	return &p
163}
164
165// Float32Slice defines a []float32 flag with specified name, default value, and usage string.
166// The return value is the address of a []float32 variable that stores the value of the flag.
167func Float32Slice(name string, value []float32, usage string) *[]float32 {
168	return CommandLine.Float32SliceP(name, "", value, usage)
169}
170
171// Float32SliceP is like Float32Slice, but accepts a shorthand letter that can be used after a single dash.
172func Float32SliceP(name, shorthand string, value []float32, usage string) *[]float32 {
173	return CommandLine.Float32SliceP(name, shorthand, value, usage)
174}
175