string_to_int64.go

Documentation: github.com/spf13/pflag

     1  package pflag
     2  
     3  import (
     4  	"bytes"
     5  	"fmt"
     6  	"strconv"
     7  	"strings"
     8  )
     9  
    10  // -- stringToInt64 Value
    11  type stringToInt64Value struct {
    12  	value   *map[string]int64
    13  	changed bool
    14  }
    15  
    16  func newStringToInt64Value(val map[string]int64, p *map[string]int64) *stringToInt64Value {
    17  	ssv := new(stringToInt64Value)
    18  	ssv.value = p
    19  	*ssv.value = val
    20  	return ssv
    21  }
    22  
    23  // Format: a=1,b=2
    24  func (s *stringToInt64Value) Set(val string) error {
    25  	ss := strings.Split(val, ",")
    26  	out := make(map[string]int64, len(ss))
    27  	for _, pair := range ss {
    28  		kv := strings.SplitN(pair, "=", 2)
    29  		if len(kv) != 2 {
    30  			return fmt.Errorf("%s must be formatted as key=value", pair)
    31  		}
    32  		var err error
    33  		out[kv[0]], err = strconv.ParseInt(kv[1], 10, 64)
    34  		if err != nil {
    35  			return err
    36  		}
    37  	}
    38  	if !s.changed {
    39  		*s.value = out
    40  	} else {
    41  		for k, v := range out {
    42  			(*s.value)[k] = v
    43  		}
    44  	}
    45  	s.changed = true
    46  	return nil
    47  }
    48  
    49  func (s *stringToInt64Value) Type() string {
    50  	return "stringToInt64"
    51  }
    52  
    53  func (s *stringToInt64Value) String() string {
    54  	var buf bytes.Buffer
    55  	i := 0
    56  	for k, v := range *s.value {
    57  		if i > 0 {
    58  			buf.WriteRune(',')
    59  		}
    60  		buf.WriteString(k)
    61  		buf.WriteRune('=')
    62  		buf.WriteString(strconv.FormatInt(v, 10))
    63  		i++
    64  	}
    65  	return "[" + buf.String() + "]"
    66  }
    67  
    68  func stringToInt64Conv(val string) (interface{}, error) {
    69  	val = strings.Trim(val, "[]")
    70  	// An empty string would cause an empty map
    71  	if len(val) == 0 {
    72  		return map[string]int64{}, nil
    73  	}
    74  	ss := strings.Split(val, ",")
    75  	out := make(map[string]int64, len(ss))
    76  	for _, pair := range ss {
    77  		kv := strings.SplitN(pair, "=", 2)
    78  		if len(kv) != 2 {
    79  			return nil, fmt.Errorf("%s must be formatted as key=value", pair)
    80  		}
    81  		var err error
    82  		out[kv[0]], err = strconv.ParseInt(kv[1], 10, 64)
    83  		if err != nil {
    84  			return nil, err
    85  		}
    86  	}
    87  	return out, nil
    88  }
    89  
    90  // GetStringToInt64 return the map[string]int64 value of a flag with the given name
    91  func (f *FlagSet) GetStringToInt64(name string) (map[string]int64, error) {
    92  	val, err := f.getFlagType(name, "stringToInt64", stringToInt64Conv)
    93  	if err != nil {
    94  		return map[string]int64{}, err
    95  	}
    96  	return val.(map[string]int64), nil
    97  }
    98  
    99  // StringToInt64Var defines a string flag with specified name, default value, and usage string.
   100  // The argument p point64s to a map[string]int64 variable in which to store the values of the multiple flags.
   101  // The value of each argument will not try to be separated by comma
   102  func (f *FlagSet) StringToInt64Var(p *map[string]int64, name string, value map[string]int64, usage string) {
   103  	f.VarP(newStringToInt64Value(value, p), name, "", usage)
   104  }
   105  
   106  // StringToInt64VarP is like StringToInt64Var, but accepts a shorthand letter that can be used after a single dash.
   107  func (f *FlagSet) StringToInt64VarP(p *map[string]int64, name, shorthand string, value map[string]int64, usage string) {
   108  	f.VarP(newStringToInt64Value(value, p), name, shorthand, usage)
   109  }
   110  
   111  // StringToInt64Var defines a string flag with specified name, default value, and usage string.
   112  // The argument p point64s to a map[string]int64 variable in which to store the value of the flag.
   113  // The value of each argument will not try to be separated by comma
   114  func StringToInt64Var(p *map[string]int64, name string, value map[string]int64, usage string) {
   115  	CommandLine.VarP(newStringToInt64Value(value, p), name, "", usage)
   116  }
   117  
   118  // StringToInt64VarP is like StringToInt64Var, but accepts a shorthand letter that can be used after a single dash.
   119  func StringToInt64VarP(p *map[string]int64, name, shorthand string, value map[string]int64, usage string) {
   120  	CommandLine.VarP(newStringToInt64Value(value, p), name, shorthand, usage)
   121  }
   122  
   123  // StringToInt64 defines a string flag with specified name, default value, and usage string.
   124  // The return value is the address of a map[string]int64 variable that stores the value of the flag.
   125  // The value of each argument will not try to be separated by comma
   126  func (f *FlagSet) StringToInt64(name string, value map[string]int64, usage string) *map[string]int64 {
   127  	p := map[string]int64{}
   128  	f.StringToInt64VarP(&p, name, "", value, usage)
   129  	return &p
   130  }
   131  
   132  // StringToInt64P is like StringToInt64, but accepts a shorthand letter that can be used after a single dash.
   133  func (f *FlagSet) StringToInt64P(name, shorthand string, value map[string]int64, usage string) *map[string]int64 {
   134  	p := map[string]int64{}
   135  	f.StringToInt64VarP(&p, name, shorthand, value, usage)
   136  	return &p
   137  }
   138  
   139  // StringToInt64 defines a string flag with specified name, default value, and usage string.
   140  // The return value is the address of a map[string]int64 variable that stores the value of the flag.
   141  // The value of each argument will not try to be separated by comma
   142  func StringToInt64(name string, value map[string]int64, usage string) *map[string]int64 {
   143  	return CommandLine.StringToInt64P(name, "", value, usage)
   144  }
   145  
   146  // StringToInt64P is like StringToInt64, but accepts a shorthand letter that can be used after a single dash.
   147  func StringToInt64P(name, shorthand string, value map[string]int64, usage string) *map[string]int64 {
   148  	return CommandLine.StringToInt64P(name, shorthand, value, usage)
   149  }
   150
View as plain text