Scott Baker | e7144bc | 2019-10-01 14:16:47 -0700 | [diff] [blame^] | 1 | package pflag |
| 2 | |
| 3 | import "strconv" |
| 4 | |
| 5 | // -- count Value |
| 6 | type countValue int |
| 7 | |
| 8 | func newCountValue(val int, p *int) *countValue { |
| 9 | *p = val |
| 10 | return (*countValue)(p) |
| 11 | } |
| 12 | |
| 13 | func (i *countValue) Set(s string) error { |
| 14 | // "+1" means that no specific value was passed, so increment |
| 15 | if s == "+1" { |
| 16 | *i = countValue(*i + 1) |
| 17 | return nil |
| 18 | } |
| 19 | v, err := strconv.ParseInt(s, 0, 0) |
| 20 | *i = countValue(v) |
| 21 | return err |
| 22 | } |
| 23 | |
| 24 | func (i *countValue) Type() string { |
| 25 | return "count" |
| 26 | } |
| 27 | |
| 28 | func (i *countValue) String() string { return strconv.Itoa(int(*i)) } |
| 29 | |
| 30 | func countConv(sval string) (interface{}, error) { |
| 31 | i, err := strconv.Atoi(sval) |
| 32 | if err != nil { |
| 33 | return nil, err |
| 34 | } |
| 35 | return i, nil |
| 36 | } |
| 37 | |
| 38 | // GetCount return the int value of a flag with the given name |
| 39 | func (f *FlagSet) GetCount(name string) (int, error) { |
| 40 | val, err := f.getFlagType(name, "count", countConv) |
| 41 | if err != nil { |
| 42 | return 0, err |
| 43 | } |
| 44 | return val.(int), nil |
| 45 | } |
| 46 | |
| 47 | // CountVar defines a count flag with specified name, default value, and usage string. |
| 48 | // The argument p points to an int variable in which to store the value of the flag. |
| 49 | // A count flag will add 1 to its value evey time it is found on the command line |
| 50 | func (f *FlagSet) CountVar(p *int, name string, usage string) { |
| 51 | f.CountVarP(p, name, "", usage) |
| 52 | } |
| 53 | |
| 54 | // CountVarP is like CountVar only take a shorthand for the flag name. |
| 55 | func (f *FlagSet) CountVarP(p *int, name, shorthand string, usage string) { |
| 56 | flag := f.VarPF(newCountValue(0, p), name, shorthand, usage) |
| 57 | flag.NoOptDefVal = "+1" |
| 58 | } |
| 59 | |
| 60 | // CountVar like CountVar only the flag is placed on the CommandLine instead of a given flag set |
| 61 | func CountVar(p *int, name string, usage string) { |
| 62 | CommandLine.CountVar(p, name, usage) |
| 63 | } |
| 64 | |
| 65 | // CountVarP is like CountVar only take a shorthand for the flag name. |
| 66 | func CountVarP(p *int, name, shorthand string, usage string) { |
| 67 | CommandLine.CountVarP(p, name, shorthand, usage) |
| 68 | } |
| 69 | |
| 70 | // Count defines a count flag with specified name, default value, and usage string. |
| 71 | // The return value is the address of an int variable that stores the value of the flag. |
| 72 | // A count flag will add 1 to its value evey time it is found on the command line |
| 73 | func (f *FlagSet) Count(name string, usage string) *int { |
| 74 | p := new(int) |
| 75 | f.CountVarP(p, name, "", usage) |
| 76 | return p |
| 77 | } |
| 78 | |
| 79 | // CountP is like Count only takes a shorthand for the flag name. |
| 80 | func (f *FlagSet) CountP(name, shorthand string, usage string) *int { |
| 81 | p := new(int) |
| 82 | f.CountVarP(p, name, shorthand, usage) |
| 83 | return p |
| 84 | } |
| 85 | |
| 86 | // Count defines a count flag with specified name, default value, and usage string. |
| 87 | // The return value is the address of an int variable that stores the value of the flag. |
| 88 | // A count flag will add 1 to its value evey time it is found on the command line |
| 89 | func Count(name string, usage string) *int { |
| 90 | return CommandLine.CountP(name, "", usage) |
| 91 | } |
| 92 | |
| 93 | // CountP is like Count only takes a shorthand for the flag name. |
| 94 | func CountP(name, shorthand string, usage string) *int { |
| 95 | return CommandLine.CountP(name, shorthand, usage) |
| 96 | } |