leobot

key.go (24405B)

---

 // Copyright 2014 Unknwon
 //
 // Licensed under the Apache License, Version 2.0 (the "License"): you may
 // not use this file except in compliance with the License. You may obtain
 // a copy of the License at
 //
 //     http://www.apache.org/licenses/LICENSE-2.0
 //
 // Unless required by applicable law or agreed to in writing, software
 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
 // License for the specific language governing permissions and limitations
 // under the License.
 
 package ini
 
 import (
 	"bytes"
 	"errors"
 	"fmt"
 	"strconv"
 	"strings"
 	"time"
 )
 
 // Key represents a key under a section.
 type Key struct {
 	s               *Section
 	Comment         string
 	name            string
 	value           string
 	isAutoIncrement bool
 	isBooleanType   bool
 
 	isShadow bool
 	shadows  []*Key
 
 	nestedValues []string
 }
 
 // newKey simply return a key object with given values.
 func newKey(s *Section, name, val string) *Key {
 	return &Key{
 		s:     s,
 		name:  name,
 		value: val,
 	}
 }
 
 func (k *Key) addShadow(val string) error {
 	if k.isShadow {
 		return errors.New("cannot add shadow to another shadow key")
 	} else if k.isAutoIncrement || k.isBooleanType {
 		return errors.New("cannot add shadow to auto-increment or boolean key")
 	}
 
 	if !k.s.f.options.AllowDuplicateShadowValues {
 		// Deduplicate shadows based on their values.
 		if k.value == val {
 			return nil
 		}
 		for i := range k.shadows {
 			if k.shadows[i].value == val {
 				return nil
 			}
 		}
 	}
 
 	shadow := newKey(k.s, k.name, val)
 	shadow.isShadow = true
 	k.shadows = append(k.shadows, shadow)
 	return nil
 }
 
 // AddShadow adds a new shadow key to itself.
 func (k *Key) AddShadow(val string) error {
 	if !k.s.f.options.AllowShadows {
 		return errors.New("shadow key is not allowed")
 	}
 	return k.addShadow(val)
 }
 
 func (k *Key) addNestedValue(val string) error {
 	if k.isAutoIncrement || k.isBooleanType {
 		return errors.New("cannot add nested value to auto-increment or boolean key")
 	}
 
 	k.nestedValues = append(k.nestedValues, val)
 	return nil
 }
 
 // AddNestedValue adds a nested value to the key.
 func (k *Key) AddNestedValue(val string) error {
 	if !k.s.f.options.AllowNestedValues {
 		return errors.New("nested value is not allowed")
 	}
 	return k.addNestedValue(val)
 }
 
 // ValueMapper represents a mapping function for values, e.g. os.ExpandEnv
 type ValueMapper func(string) string
 
 // Name returns name of key.
 func (k *Key) Name() string {
 	return k.name
 }
 
 // Value returns raw value of key for performance purpose.
 func (k *Key) Value() string {
 	return k.value
 }
 
 // ValueWithShadows returns raw values of key and its shadows if any. Shadow
 // keys with empty values are ignored from the returned list.
 func (k *Key) ValueWithShadows() []string {
 	if len(k.shadows) == 0 {
 		if k.value == "" {
 			return []string{}
 		}
 		return []string{k.value}
 	}
 
 	vals := make([]string, 0, len(k.shadows)+1)
 	if k.value != "" {
 		vals = append(vals, k.value)
 	}
 	for _, s := range k.shadows {
 		if s.value != "" {
 			vals = append(vals, s.value)
 		}
 	}
 	return vals
 }
 
 // NestedValues returns nested values stored in the key.
 // It is possible returned value is nil if no nested values stored in the key.
 func (k *Key) NestedValues() []string {
 	return k.nestedValues
 }
 
 // transformValue takes a raw value and transforms to its final string.
 func (k *Key) transformValue(val string) string {
 	if k.s.f.ValueMapper != nil {
 		val = k.s.f.ValueMapper(val)
 	}
 
 	// Fail-fast if no indicate char found for recursive value
 	if !strings.Contains(val, "%") {
 		return val
 	}
 	for i := 0; i < depthValues; i++ {
 		vr := varPattern.FindString(val)
 		if len(vr) == 0 {
 			break
 		}
 
 		// Take off leading '%(' and trailing ')s'.
 		noption := vr[2 : len(vr)-2]
 
 		// Search in the same section.
 		// If not found or found the key itself, then search again in default section.
 		nk, err := k.s.GetKey(noption)
 		if err != nil || k == nk {
 			nk, _ = k.s.f.Section("").GetKey(noption)
 			if nk == nil {
 				// Stop when no results found in the default section,
 				// and returns the value as-is.
 				break
 			}
 		}
 
 		// Substitute by new value and take off leading '%(' and trailing ')s'.
 		val = strings.Replace(val, vr, nk.value, -1)
 	}
 	return val
 }
 
 // String returns string representation of value.
 func (k *Key) String() string {
 	return k.transformValue(k.value)
 }
 
 // Validate accepts a validate function which can
 // return modifed result as key value.
 func (k *Key) Validate(fn func(string) string) string {
 	return fn(k.String())
 }
 
 // parseBool returns the boolean value represented by the string.
 //
 // It accepts 1, t, T, TRUE, true, True, YES, yes, Yes, y, ON, on, On,
 // 0, f, F, FALSE, false, False, NO, no, No, n, OFF, off, Off.
 // Any other value returns an error.
 func parseBool(str string) (value bool, err error) {
 	switch str {
 	case "1", "t", "T", "true", "TRUE", "True", "YES", "yes", "Yes", "y", "ON", "on", "On":
 		return true, nil
 	case "0", "f", "F", "false", "FALSE", "False", "NO", "no", "No", "n", "OFF", "off", "Off":
 		return false, nil
 	}
 	return false, fmt.Errorf("parsing \"%s\": invalid syntax", str)
 }
 
 // Bool returns bool type value.
 func (k *Key) Bool() (bool, error) {
 	return parseBool(k.String())
 }
 
 // Float64 returns float64 type value.
 func (k *Key) Float64() (float64, error) {
 	return strconv.ParseFloat(k.String(), 64)
 }
 
 // Int returns int type value.
 func (k *Key) Int() (int, error) {
 	v, err := strconv.ParseInt(k.String(), 0, 64)
 	return int(v), err
 }
 
 // Int64 returns int64 type value.
 func (k *Key) Int64() (int64, error) {
 	return strconv.ParseInt(k.String(), 0, 64)
 }
 
 // Uint returns uint type valued.
 func (k *Key) Uint() (uint, error) {
 	u, e := strconv.ParseUint(k.String(), 0, 64)
 	return uint(u), e
 }
 
 // Uint64 returns uint64 type value.
 func (k *Key) Uint64() (uint64, error) {
 	return strconv.ParseUint(k.String(), 0, 64)
 }
 
 // Duration returns time.Duration type value.
 func (k *Key) Duration() (time.Duration, error) {
 	return time.ParseDuration(k.String())
 }
 
 // TimeFormat parses with given format and returns time.Time type value.
 func (k *Key) TimeFormat(format string) (time.Time, error) {
 	return time.Parse(format, k.String())
 }
 
 // Time parses with RFC3339 format and returns time.Time type value.
 func (k *Key) Time() (time.Time, error) {
 	return k.TimeFormat(time.RFC3339)
 }
 
 // MustString returns default value if key value is empty.
 func (k *Key) MustString(defaultVal string) string {
 	val := k.String()
 	if len(val) == 0 {
 		k.value = defaultVal
 		return defaultVal
 	}
 	return val
 }
 
 // MustBool always returns value without error,
 // it returns false if error occurs.
 func (k *Key) MustBool(defaultVal ...bool) bool {
 	val, err := k.Bool()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatBool(defaultVal[0])
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustFloat64 always returns value without error,
 // it returns 0.0 if error occurs.
 func (k *Key) MustFloat64(defaultVal ...float64) float64 {
 	val, err := k.Float64()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatFloat(defaultVal[0], 'f', -1, 64)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustInt always returns value without error,
 // it returns 0 if error occurs.
 func (k *Key) MustInt(defaultVal ...int) int {
 	val, err := k.Int()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatInt(int64(defaultVal[0]), 10)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustInt64 always returns value without error,
 // it returns 0 if error occurs.
 func (k *Key) MustInt64(defaultVal ...int64) int64 {
 	val, err := k.Int64()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatInt(defaultVal[0], 10)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustUint always returns value without error,
 // it returns 0 if error occurs.
 func (k *Key) MustUint(defaultVal ...uint) uint {
 	val, err := k.Uint()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatUint(uint64(defaultVal[0]), 10)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustUint64 always returns value without error,
 // it returns 0 if error occurs.
 func (k *Key) MustUint64(defaultVal ...uint64) uint64 {
 	val, err := k.Uint64()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = strconv.FormatUint(defaultVal[0], 10)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustDuration always returns value without error,
 // it returns zero value if error occurs.
 func (k *Key) MustDuration(defaultVal ...time.Duration) time.Duration {
 	val, err := k.Duration()
 	if len(defaultVal) > 0 && err != nil {
 		k.value = defaultVal[0].String()
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustTimeFormat always parses with given format and returns value without error,
 // it returns zero value if error occurs.
 func (k *Key) MustTimeFormat(format string, defaultVal ...time.Time) time.Time {
 	val, err := k.TimeFormat(format)
 	if len(defaultVal) > 0 && err != nil {
 		k.value = defaultVal[0].Format(format)
 		return defaultVal[0]
 	}
 	return val
 }
 
 // MustTime always parses with RFC3339 format and returns value without error,
 // it returns zero value if error occurs.
 func (k *Key) MustTime(defaultVal ...time.Time) time.Time {
 	return k.MustTimeFormat(time.RFC3339, defaultVal...)
 }
 
 // In always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) In(defaultVal string, candidates []string) string {
 	val := k.String()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InFloat64 always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InFloat64(defaultVal float64, candidates []float64) float64 {
 	val := k.MustFloat64()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InInt always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InInt(defaultVal int, candidates []int) int {
 	val := k.MustInt()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InInt64 always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InInt64(defaultVal int64, candidates []int64) int64 {
 	val := k.MustInt64()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InUint always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InUint(defaultVal uint, candidates []uint) uint {
 	val := k.MustUint()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InUint64 always returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InUint64(defaultVal uint64, candidates []uint64) uint64 {
 	val := k.MustUint64()
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InTimeFormat always parses with given format and returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InTimeFormat(format string, defaultVal time.Time, candidates []time.Time) time.Time {
 	val := k.MustTimeFormat(format)
 	for _, cand := range candidates {
 		if val == cand {
 			return val
 		}
 	}
 	return defaultVal
 }
 
 // InTime always parses with RFC3339 format and returns value without error,
 // it returns default value if error occurs or doesn't fit into candidates.
 func (k *Key) InTime(defaultVal time.Time, candidates []time.Time) time.Time {
 	return k.InTimeFormat(time.RFC3339, defaultVal, candidates)
 }
 
 // RangeFloat64 checks if value is in given range inclusively,
 // and returns default value if it's not.
 func (k *Key) RangeFloat64(defaultVal, min, max float64) float64 {
 	val := k.MustFloat64()
 	if val < min || val > max {
 		return defaultVal
 	}
 	return val
 }
 
 // RangeInt checks if value is in given range inclusively,
 // and returns default value if it's not.
 func (k *Key) RangeInt(defaultVal, min, max int) int {
 	val := k.MustInt()
 	if val < min || val > max {
 		return defaultVal
 	}
 	return val
 }
 
 // RangeInt64 checks if value is in given range inclusively,
 // and returns default value if it's not.
 func (k *Key) RangeInt64(defaultVal, min, max int64) int64 {
 	val := k.MustInt64()
 	if val < min || val > max {
 		return defaultVal
 	}
 	return val
 }
 
 // RangeTimeFormat checks if value with given format is in given range inclusively,
 // and returns default value if it's not.
 func (k *Key) RangeTimeFormat(format string, defaultVal, min, max time.Time) time.Time {
 	val := k.MustTimeFormat(format)
 	if val.Unix() < min.Unix() || val.Unix() > max.Unix() {
 		return defaultVal
 	}
 	return val
 }
 
 // RangeTime checks if value with RFC3339 format is in given range inclusively,
 // and returns default value if it's not.
 func (k *Key) RangeTime(defaultVal, min, max time.Time) time.Time {
 	return k.RangeTimeFormat(time.RFC3339, defaultVal, min, max)
 }
 
 // Strings returns list of string divided by given delimiter.
 func (k *Key) Strings(delim string) []string {
 	str := k.String()
 	if len(str) == 0 {
 		return []string{}
 	}
 
 	runes := []rune(str)
 	vals := make([]string, 0, 2)
 	var buf bytes.Buffer
 	escape := false
 	idx := 0
 	for {
 		if escape {
 			escape = false
 			if runes[idx] != '\\' && !strings.HasPrefix(string(runes[idx:]), delim) {
 				buf.WriteRune('\\')
 			}
 			buf.WriteRune(runes[idx])
 		} else {
 			if runes[idx] == '\\' {
 				escape = true
 			} else if strings.HasPrefix(string(runes[idx:]), delim) {
 				idx += len(delim) - 1
 				vals = append(vals, strings.TrimSpace(buf.String()))
 				buf.Reset()
 			} else {
 				buf.WriteRune(runes[idx])
 			}
 		}
 		idx++
 		if idx == len(runes) {
 			break
 		}
 	}
 
 	if buf.Len() > 0 {
 		vals = append(vals, strings.TrimSpace(buf.String()))
 	}
 
 	return vals
 }
 
 // StringsWithShadows returns list of string divided by given delimiter.
 // Shadows will also be appended if any.
 func (k *Key) StringsWithShadows(delim string) []string {
 	vals := k.ValueWithShadows()
 	results := make([]string, 0, len(vals)*2)
 	for i := range vals {
 		if len(vals) == 0 {
 			continue
 		}
 
 		results = append(results, strings.Split(vals[i], delim)...)
 	}
 
 	for i := range results {
 		results[i] = k.transformValue(strings.TrimSpace(results[i]))
 	}
 	return results
 }
 
 // Float64s returns list of float64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Float64s(delim string) []float64 {
 	vals, _ := k.parseFloat64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // Ints returns list of int divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Ints(delim string) []int {
 	vals, _ := k.parseInts(k.Strings(delim), true, false)
 	return vals
 }
 
 // Int64s returns list of int64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Int64s(delim string) []int64 {
 	vals, _ := k.parseInt64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // Uints returns list of uint divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Uints(delim string) []uint {
 	vals, _ := k.parseUints(k.Strings(delim), true, false)
 	return vals
 }
 
 // Uint64s returns list of uint64 divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Uint64s(delim string) []uint64 {
 	vals, _ := k.parseUint64s(k.Strings(delim), true, false)
 	return vals
 }
 
 // Bools returns list of bool divided by given delimiter. Any invalid input will be treated as zero value.
 func (k *Key) Bools(delim string) []bool {
 	vals, _ := k.parseBools(k.Strings(delim), true, false)
 	return vals
 }
 
 // TimesFormat parses with given format and returns list of time.Time divided by given delimiter.
 // Any invalid input will be treated as zero value (0001-01-01 00:00:00 +0000 UTC).
 func (k *Key) TimesFormat(format, delim string) []time.Time {
 	vals, _ := k.parseTimesFormat(format, k.Strings(delim), true, false)
 	return vals
 }
 
 // Times parses with RFC3339 format and returns list of time.Time divided by given delimiter.
 // Any invalid input will be treated as zero value (0001-01-01 00:00:00 +0000 UTC).
 func (k *Key) Times(delim string) []time.Time {
 	return k.TimesFormat(time.RFC3339, delim)
 }
 
 // ValidFloat64s returns list of float64 divided by given delimiter. If some value is not float, then
 // it will not be included to result list.
 func (k *Key) ValidFloat64s(delim string) []float64 {
 	vals, _ := k.parseFloat64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidInts returns list of int divided by given delimiter. If some value is not integer, then it will
 // not be included to result list.
 func (k *Key) ValidInts(delim string) []int {
 	vals, _ := k.parseInts(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidInt64s returns list of int64 divided by given delimiter. If some value is not 64-bit integer,
 // then it will not be included to result list.
 func (k *Key) ValidInt64s(delim string) []int64 {
 	vals, _ := k.parseInt64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidUints returns list of uint divided by given delimiter. If some value is not unsigned integer,
 // then it will not be included to result list.
 func (k *Key) ValidUints(delim string) []uint {
 	vals, _ := k.parseUints(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidUint64s returns list of uint64 divided by given delimiter. If some value is not 64-bit unsigned
 // integer, then it will not be included to result list.
 func (k *Key) ValidUint64s(delim string) []uint64 {
 	vals, _ := k.parseUint64s(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidBools returns list of bool divided by given delimiter. If some value is not 64-bit unsigned
 // integer, then it will not be included to result list.
 func (k *Key) ValidBools(delim string) []bool {
 	vals, _ := k.parseBools(k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidTimesFormat parses with given format and returns list of time.Time divided by given delimiter.
 func (k *Key) ValidTimesFormat(format, delim string) []time.Time {
 	vals, _ := k.parseTimesFormat(format, k.Strings(delim), false, false)
 	return vals
 }
 
 // ValidTimes parses with RFC3339 format and returns list of time.Time divided by given delimiter.
 func (k *Key) ValidTimes(delim string) []time.Time {
 	return k.ValidTimesFormat(time.RFC3339, delim)
 }
 
 // StrictFloat64s returns list of float64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictFloat64s(delim string) ([]float64, error) {
 	return k.parseFloat64s(k.Strings(delim), false, true)
 }
 
 // StrictInts returns list of int divided by given delimiter or error on first invalid input.
 func (k *Key) StrictInts(delim string) ([]int, error) {
 	return k.parseInts(k.Strings(delim), false, true)
 }
 
 // StrictInt64s returns list of int64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictInt64s(delim string) ([]int64, error) {
 	return k.parseInt64s(k.Strings(delim), false, true)
 }
 
 // StrictUints returns list of uint divided by given delimiter or error on first invalid input.
 func (k *Key) StrictUints(delim string) ([]uint, error) {
 	return k.parseUints(k.Strings(delim), false, true)
 }
 
 // StrictUint64s returns list of uint64 divided by given delimiter or error on first invalid input.
 func (k *Key) StrictUint64s(delim string) ([]uint64, error) {
 	return k.parseUint64s(k.Strings(delim), false, true)
 }
 
 // StrictBools returns list of bool divided by given delimiter or error on first invalid input.
 func (k *Key) StrictBools(delim string) ([]bool, error) {
 	return k.parseBools(k.Strings(delim), false, true)
 }
 
 // StrictTimesFormat parses with given format and returns list of time.Time divided by given delimiter
 // or error on first invalid input.
 func (k *Key) StrictTimesFormat(format, delim string) ([]time.Time, error) {
 	return k.parseTimesFormat(format, k.Strings(delim), false, true)
 }
 
 // StrictTimes parses with RFC3339 format and returns list of time.Time divided by given delimiter
 // or error on first invalid input.
 func (k *Key) StrictTimes(delim string) ([]time.Time, error) {
 	return k.StrictTimesFormat(time.RFC3339, delim)
 }
 
 // parseBools transforms strings to bools.
 func (k *Key) parseBools(strs []string, addInvalid, returnOnInvalid bool) ([]bool, error) {
 	vals := make([]bool, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := parseBool(str)
 		return val, err
 	}
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, val.(bool))
 		}
 	}
 	return vals, err
 }
 
 // parseFloat64s transforms strings to float64s.
 func (k *Key) parseFloat64s(strs []string, addInvalid, returnOnInvalid bool) ([]float64, error) {
 	vals := make([]float64, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := strconv.ParseFloat(str, 64)
 		return val, err
 	}
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, val.(float64))
 		}
 	}
 	return vals, err
 }
 
 // parseInts transforms strings to ints.
 func (k *Key) parseInts(strs []string, addInvalid, returnOnInvalid bool) ([]int, error) {
 	vals := make([]int, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := strconv.ParseInt(str, 0, 64)
 		return val, err
 	}
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, int(val.(int64)))
 		}
 	}
 	return vals, err
 }
 
 // parseInt64s transforms strings to int64s.
 func (k *Key) parseInt64s(strs []string, addInvalid, returnOnInvalid bool) ([]int64, error) {
 	vals := make([]int64, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := strconv.ParseInt(str, 0, 64)
 		return val, err
 	}
 
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, val.(int64))
 		}
 	}
 	return vals, err
 }
 
 // parseUints transforms strings to uints.
 func (k *Key) parseUints(strs []string, addInvalid, returnOnInvalid bool) ([]uint, error) {
 	vals := make([]uint, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := strconv.ParseUint(str, 0, 64)
 		return val, err
 	}
 
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, uint(val.(uint64)))
 		}
 	}
 	return vals, err
 }
 
 // parseUint64s transforms strings to uint64s.
 func (k *Key) parseUint64s(strs []string, addInvalid, returnOnInvalid bool) ([]uint64, error) {
 	vals := make([]uint64, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := strconv.ParseUint(str, 0, 64)
 		return val, err
 	}
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, val.(uint64))
 		}
 	}
 	return vals, err
 }
 
 type Parser func(str string) (interface{}, error)
 
 // parseTimesFormat transforms strings to times in given format.
 func (k *Key) parseTimesFormat(format string, strs []string, addInvalid, returnOnInvalid bool) ([]time.Time, error) {
 	vals := make([]time.Time, 0, len(strs))
 	parser := func(str string) (interface{}, error) {
 		val, err := time.Parse(format, str)
 		return val, err
 	}
 	rawVals, err := k.doParse(strs, addInvalid, returnOnInvalid, parser)
 	if err == nil {
 		for _, val := range rawVals {
 			vals = append(vals, val.(time.Time))
 		}
 	}
 	return vals, err
 }
 
 // doParse transforms strings to different types
 func (k *Key) doParse(strs []string, addInvalid, returnOnInvalid bool, parser Parser) ([]interface{}, error) {
 	vals := make([]interface{}, 0, len(strs))
 	for _, str := range strs {
 		val, err := parser(str)
 		if err != nil && returnOnInvalid {
 			return nil, err
 		}
 		if err == nil || addInvalid {
 			vals = append(vals, val)
 		}
 	}
 	return vals, nil
 }
 
 // SetValue changes key value.
 func (k *Key) SetValue(v string) {
 	if k.s.f.BlockMode {
 		k.s.f.lock.Lock()
 		defer k.s.f.lock.Unlock()
 	}
 
 	k.value = v
 	k.s.keysHash[k.name] = v
 }