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Diffstat (limited to '')
-rw-r--r-- | dependencies/pkg/mod/github.com/jessevdk/go-flags@v1.5.0/convert.go | 357 |
1 files changed, 357 insertions, 0 deletions
diff --git a/dependencies/pkg/mod/github.com/jessevdk/go-flags@v1.5.0/convert.go b/dependencies/pkg/mod/github.com/jessevdk/go-flags@v1.5.0/convert.go new file mode 100644 index 0000000..cda29b2 --- /dev/null +++ b/dependencies/pkg/mod/github.com/jessevdk/go-flags@v1.5.0/convert.go @@ -0,0 +1,357 @@ +// Copyright 2012 Jesse van den Kieboom. All rights reserved. +// Use of this source code is governed by a BSD-style +// license that can be found in the LICENSE file. + +package flags + +import ( + "fmt" + "reflect" + "strconv" + "strings" + "time" +) + +// Marshaler is the interface implemented by types that can marshal themselves +// to a string representation of the flag. +type Marshaler interface { + // MarshalFlag marshals a flag value to its string representation. + MarshalFlag() (string, error) +} + +// Unmarshaler is the interface implemented by types that can unmarshal a flag +// argument to themselves. The provided value is directly passed from the +// command line. +type Unmarshaler interface { + // UnmarshalFlag unmarshals a string value representation to the flag + // value (which therefore needs to be a pointer receiver). + UnmarshalFlag(value string) error +} + +// ValueValidator is the interface implemented by types that can validate a +// flag argument themselves. The provided value is directly passed from the +// command line. +type ValueValidator interface { + // IsValidValue returns an error if the provided string value is valid for + // the flag. + IsValidValue(value string) error +} + +func getBase(options multiTag, base int) (int, error) { + sbase := options.Get("base") + + var err error + var ivbase int64 + + if sbase != "" { + ivbase, err = strconv.ParseInt(sbase, 10, 32) + base = int(ivbase) + } + + return base, err +} + +func convertMarshal(val reflect.Value) (bool, string, error) { + // Check first for the Marshaler interface + if val.Type().NumMethod() > 0 && val.CanInterface() { + if marshaler, ok := val.Interface().(Marshaler); ok { + ret, err := marshaler.MarshalFlag() + return true, ret, err + } + } + + return false, "", nil +} + +func convertToString(val reflect.Value, options multiTag) (string, error) { + if ok, ret, err := convertMarshal(val); ok { + return ret, err + } + + tp := val.Type() + + // Support for time.Duration + if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() { + stringer := val.Interface().(fmt.Stringer) + return stringer.String(), nil + } + + switch tp.Kind() { + case reflect.String: + return val.String(), nil + case reflect.Bool: + if val.Bool() { + return "true", nil + } + + return "false", nil + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: + base, err := getBase(options, 10) + + if err != nil { + return "", err + } + + return strconv.FormatInt(val.Int(), base), nil + case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: + base, err := getBase(options, 10) + + if err != nil { + return "", err + } + + return strconv.FormatUint(val.Uint(), base), nil + case reflect.Float32, reflect.Float64: + return strconv.FormatFloat(val.Float(), 'g', -1, tp.Bits()), nil + case reflect.Slice: + if val.Len() == 0 { + return "", nil + } + + ret := "[" + + for i := 0; i < val.Len(); i++ { + if i != 0 { + ret += ", " + } + + item, err := convertToString(val.Index(i), options) + + if err != nil { + return "", err + } + + ret += item + } + + return ret + "]", nil + case reflect.Map: + ret := "{" + + for i, key := range val.MapKeys() { + if i != 0 { + ret += ", " + } + + keyitem, err := convertToString(key, options) + + if err != nil { + return "", err + } + + item, err := convertToString(val.MapIndex(key), options) + + if err != nil { + return "", err + } + + ret += keyitem + ":" + item + } + + return ret + "}", nil + case reflect.Ptr: + return convertToString(reflect.Indirect(val), options) + case reflect.Interface: + if !val.IsNil() { + return convertToString(val.Elem(), options) + } + } + + return "", nil +} + +func convertUnmarshal(val string, retval reflect.Value) (bool, error) { + if retval.Type().NumMethod() > 0 && retval.CanInterface() { + if unmarshaler, ok := retval.Interface().(Unmarshaler); ok { + if retval.IsNil() { + retval.Set(reflect.New(retval.Type().Elem())) + + // Re-assign from the new value + unmarshaler = retval.Interface().(Unmarshaler) + } + + return true, unmarshaler.UnmarshalFlag(val) + } + } + + if retval.Type().Kind() != reflect.Ptr && retval.CanAddr() { + return convertUnmarshal(val, retval.Addr()) + } + + if retval.Type().Kind() == reflect.Interface && !retval.IsNil() { + return convertUnmarshal(val, retval.Elem()) + } + + return false, nil +} + +func convert(val string, retval reflect.Value, options multiTag) error { + if ok, err := convertUnmarshal(val, retval); ok { + return err + } + + tp := retval.Type() + + // Support for time.Duration + if tp == reflect.TypeOf((*time.Duration)(nil)).Elem() { + parsed, err := time.ParseDuration(val) + + if err != nil { + return err + } + + retval.SetInt(int64(parsed)) + return nil + } + + switch tp.Kind() { + case reflect.String: + retval.SetString(val) + case reflect.Bool: + if val == "" { + retval.SetBool(true) + } else { + b, err := strconv.ParseBool(val) + + if err != nil { + return err + } + + retval.SetBool(b) + } + case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: + base, err := getBase(options, 10) + + if err != nil { + return err + } + + parsed, err := strconv.ParseInt(val, base, tp.Bits()) + + if err != nil { + return err + } + + retval.SetInt(parsed) + case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64: + base, err := getBase(options, 10) + + if err != nil { + return err + } + + parsed, err := strconv.ParseUint(val, base, tp.Bits()) + + if err != nil { + return err + } + + retval.SetUint(parsed) + case reflect.Float32, reflect.Float64: + parsed, err := strconv.ParseFloat(val, tp.Bits()) + + if err != nil { + return err + } + + retval.SetFloat(parsed) + case reflect.Slice: + elemtp := tp.Elem() + + elemvalptr := reflect.New(elemtp) + elemval := reflect.Indirect(elemvalptr) + + if err := convert(val, elemval, options); err != nil { + return err + } + + retval.Set(reflect.Append(retval, elemval)) + case reflect.Map: + parts := strings.SplitN(val, ":", 2) + + key := parts[0] + var value string + + if len(parts) == 2 { + value = parts[1] + } + + keytp := tp.Key() + keyval := reflect.New(keytp) + + if err := convert(key, keyval, options); err != nil { + return err + } + + valuetp := tp.Elem() + valueval := reflect.New(valuetp) + + if err := convert(value, valueval, options); err != nil { + return err + } + + if retval.IsNil() { + retval.Set(reflect.MakeMap(tp)) + } + + retval.SetMapIndex(reflect.Indirect(keyval), reflect.Indirect(valueval)) + case reflect.Ptr: + if retval.IsNil() { + retval.Set(reflect.New(retval.Type().Elem())) + } + + return convert(val, reflect.Indirect(retval), options) + case reflect.Interface: + if !retval.IsNil() { + return convert(val, retval.Elem(), options) + } + } + + return nil +} + +func isPrint(s string) bool { + for _, c := range s { + if !strconv.IsPrint(c) { + return false + } + } + + return true +} + +func quoteIfNeeded(s string) string { + if !isPrint(s) { + return strconv.Quote(s) + } + + return s +} + +func quoteIfNeededV(s []string) []string { + ret := make([]string, len(s)) + + for i, v := range s { + ret[i] = quoteIfNeeded(v) + } + + return ret +} + +func quoteV(s []string) []string { + ret := make([]string, len(s)) + + for i, v := range s { + ret[i] = strconv.Quote(v) + } + + return ret +} + +func unquoteIfPossible(s string) (string, error) { + if len(s) == 0 || s[0] != '"' { + return s, nil + } + + return strconv.Unquote(s) +} |