Matteo Scandolo | a428586 | 2020-12-01 18:10:10 -0800 | [diff] [blame^] | 1 | package pflag |
| 2 | |
| 3 | import ( |
| 4 | "fmt" |
| 5 | "net" |
| 6 | "strings" |
| 7 | ) |
| 8 | |
| 9 | // -- net.IP value |
| 10 | type ipValue net.IP |
| 11 | |
| 12 | func newIPValue(val net.IP, p *net.IP) *ipValue { |
| 13 | *p = val |
| 14 | return (*ipValue)(p) |
| 15 | } |
| 16 | |
| 17 | func (i *ipValue) String() string { return net.IP(*i).String() } |
| 18 | func (i *ipValue) Set(s string) error { |
| 19 | ip := net.ParseIP(strings.TrimSpace(s)) |
| 20 | if ip == nil { |
| 21 | return fmt.Errorf("failed to parse IP: %q", s) |
| 22 | } |
| 23 | *i = ipValue(ip) |
| 24 | return nil |
| 25 | } |
| 26 | |
| 27 | func (i *ipValue) Type() string { |
| 28 | return "ip" |
| 29 | } |
| 30 | |
| 31 | func ipConv(sval string) (interface{}, error) { |
| 32 | ip := net.ParseIP(sval) |
| 33 | if ip != nil { |
| 34 | return ip, nil |
| 35 | } |
| 36 | return nil, fmt.Errorf("invalid string being converted to IP address: %s", sval) |
| 37 | } |
| 38 | |
| 39 | // GetIP return the net.IP value of a flag with the given name |
| 40 | func (f *FlagSet) GetIP(name string) (net.IP, error) { |
| 41 | val, err := f.getFlagType(name, "ip", ipConv) |
| 42 | if err != nil { |
| 43 | return nil, err |
| 44 | } |
| 45 | return val.(net.IP), nil |
| 46 | } |
| 47 | |
| 48 | // IPVar defines an net.IP flag with specified name, default value, and usage string. |
| 49 | // The argument p points to an net.IP variable in which to store the value of the flag. |
| 50 | func (f *FlagSet) IPVar(p *net.IP, name string, value net.IP, usage string) { |
| 51 | f.VarP(newIPValue(value, p), name, "", usage) |
| 52 | } |
| 53 | |
| 54 | // IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash. |
| 55 | func (f *FlagSet) IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) { |
| 56 | f.VarP(newIPValue(value, p), name, shorthand, usage) |
| 57 | } |
| 58 | |
| 59 | // IPVar defines an net.IP flag with specified name, default value, and usage string. |
| 60 | // The argument p points to an net.IP variable in which to store the value of the flag. |
| 61 | func IPVar(p *net.IP, name string, value net.IP, usage string) { |
| 62 | CommandLine.VarP(newIPValue(value, p), name, "", usage) |
| 63 | } |
| 64 | |
| 65 | // IPVarP is like IPVar, but accepts a shorthand letter that can be used after a single dash. |
| 66 | func IPVarP(p *net.IP, name, shorthand string, value net.IP, usage string) { |
| 67 | CommandLine.VarP(newIPValue(value, p), name, shorthand, usage) |
| 68 | } |
| 69 | |
| 70 | // IP defines an net.IP flag with specified name, default value, and usage string. |
| 71 | // The return value is the address of an net.IP variable that stores the value of the flag. |
| 72 | func (f *FlagSet) IP(name string, value net.IP, usage string) *net.IP { |
| 73 | p := new(net.IP) |
| 74 | f.IPVarP(p, name, "", value, usage) |
| 75 | return p |
| 76 | } |
| 77 | |
| 78 | // IPP is like IP, but accepts a shorthand letter that can be used after a single dash. |
| 79 | func (f *FlagSet) IPP(name, shorthand string, value net.IP, usage string) *net.IP { |
| 80 | p := new(net.IP) |
| 81 | f.IPVarP(p, name, shorthand, value, usage) |
| 82 | return p |
| 83 | } |
| 84 | |
| 85 | // IP defines an net.IP flag with specified name, default value, and usage string. |
| 86 | // The return value is the address of an net.IP variable that stores the value of the flag. |
| 87 | func IP(name string, value net.IP, usage string) *net.IP { |
| 88 | return CommandLine.IPP(name, "", value, usage) |
| 89 | } |
| 90 | |
| 91 | // IPP is like IP, but accepts a shorthand letter that can be used after a single dash. |
| 92 | func IPP(name, shorthand string, value net.IP, usage string) *net.IP { |
| 93 | return CommandLine.IPP(name, shorthand, value, usage) |
| 94 | } |