1package pflag
 2
 3import (
 4	"fmt"
 5	"net"
 6	"strings"
 7)
 8
 9// -- net.IP value
10type ipValue net.IP
11
12func newIPValue(val net.IP, p *net.IP) *ipValue {
13	*p = val
14	return (*ipValue)(p)
15}
16
17func (i *ipValue) String() string { return net.IP(*i).String() }
18func (i *ipValue) Set(s string) error {
19	if s == "" {
20		return nil
21	}
22	ip := net.ParseIP(strings.TrimSpace(s))
23	if ip == nil {
24		return fmt.Errorf("failed to parse IP: %q", s)
25	}
26	*i = ipValue(ip)
27	return nil
28}
29
30func (i *ipValue) Type() string {
31	return "ip"
32}
33
34func ipConv(sval string) (interface{}, error) {
35	ip := net.ParseIP(sval)
36	if ip != nil {
37		return ip, nil
38	}
39	return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval)
40}
41
42// GetIP return the net.IP value of a flag with the given name
43func (f *FlagSet) GetIP(name string) (net.IP, error) {
44	val, err := f.getFlagType(name, "ip", ipConv)
45	if err != nil {
46		return nil, err
47	}
48	return val.(net.IP), nil
49}
50
51// IPVar defines an net.IP flag with specified name, default value, and usage string.
52// The argument p points to an net.IP variable in which to store the value of the flag.
53func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) {
54	f.VarP(newIPValue(value, p), name, "", usage)
55}
56
57// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
58func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
59	f.VarP(newIPValue(value, p), name, shorthand, usage)
60}
61
62// IPVar defines an net.IP flag with specified name, default value, and usage string.
63// The argument p points to an net.IP variable in which to store the value of the flag.
64func IPVar(p *net.IP, name string, value net.IP, usage string) {
65	CommandLine.VarP(newIPValue(value, p), name, "", usage)
66}
67
68// IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash.
69func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) {
70	CommandLine.VarP(newIPValue(value, p), name, shorthand, usage)
71}
72
73// IP defines an net.IP flag with specified name, default value, and usage string.
74// The return value is the address of an net.IP variable that stores the value of the flag.
75func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP {
76	p := new(net.IP)
77	f.IPVarP(p, name, "", value, usage)
78	return p
79}
80
81// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
82func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP {
83	p := new(net.IP)
84	f.IPVarP(p, name, shorthand, value, usage)
85	return p
86}
87
88// IP defines an net.IP flag with specified name, default value, and usage string.
89// The return value is the address of an net.IP variable that stores the value of the flag.
90func IP(name string, value net.IP, usage string) *net.IP {
91	return CommandLine.IPP(name, "", value, usage)
92}
93
94// IPP is like IP, but accepts a shorthand letter that can be used after a single dash.
95func IPP(name, shorthand string, value net.IP, usage string) *net.IP {
96	return CommandLine.IPP(name, shorthand, value, usage)
97}