512 lines
14 KiB
Go
512 lines
14 KiB
Go
// 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"
|
|
"reflect"
|
|
"strings"
|
|
"time"
|
|
"unicode"
|
|
)
|
|
|
|
// NameMapper represents a ini tag name mapper.
|
|
type NameMapper func(string) string
|
|
|
|
// Built-in name getters.
|
|
var (
|
|
// AllCapsUnderscore converts to format ALL_CAPS_UNDERSCORE.
|
|
AllCapsUnderscore NameMapper = func(raw string) string {
|
|
newstr := make([]rune, 0, len(raw))
|
|
for i, chr := range raw {
|
|
if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
|
|
if i > 0 {
|
|
newstr = append(newstr, '_')
|
|
}
|
|
}
|
|
newstr = append(newstr, unicode.ToUpper(chr))
|
|
}
|
|
return string(newstr)
|
|
}
|
|
// TitleUnderscore converts to format title_underscore.
|
|
TitleUnderscore NameMapper = func(raw string) string {
|
|
newstr := make([]rune, 0, len(raw))
|
|
for i, chr := range raw {
|
|
if isUpper := 'A' <= chr && chr <= 'Z'; isUpper {
|
|
if i > 0 {
|
|
newstr = append(newstr, '_')
|
|
}
|
|
chr -= ('A' - 'a')
|
|
}
|
|
newstr = append(newstr, chr)
|
|
}
|
|
return string(newstr)
|
|
}
|
|
)
|
|
|
|
func (s *Section) parseFieldName(raw, actual string) string {
|
|
if len(actual) > 0 {
|
|
return actual
|
|
}
|
|
if s.f.NameMapper != nil {
|
|
return s.f.NameMapper(raw)
|
|
}
|
|
return raw
|
|
}
|
|
|
|
func parseDelim(actual string) string {
|
|
if len(actual) > 0 {
|
|
return actual
|
|
}
|
|
return ","
|
|
}
|
|
|
|
var reflectTime = reflect.TypeOf(time.Now()).Kind()
|
|
|
|
// setSliceWithProperType sets proper values to slice based on its type.
|
|
func setSliceWithProperType(key *Key, field reflect.Value, delim string, allowShadow, isStrict bool) error {
|
|
var strs []string
|
|
if allowShadow {
|
|
strs = key.StringsWithShadows(delim)
|
|
} else {
|
|
strs = key.Strings(delim)
|
|
}
|
|
|
|
numVals := len(strs)
|
|
if numVals == 0 {
|
|
return nil
|
|
}
|
|
|
|
var vals interface{}
|
|
var err error
|
|
|
|
sliceOf := field.Type().Elem().Kind()
|
|
switch sliceOf {
|
|
case reflect.String:
|
|
vals = strs
|
|
case reflect.Int:
|
|
vals, err = key.parseInts(strs, true, false)
|
|
case reflect.Int64:
|
|
vals, err = key.parseInt64s(strs, true, false)
|
|
case reflect.Uint:
|
|
vals, err = key.parseUints(strs, true, false)
|
|
case reflect.Uint64:
|
|
vals, err = key.parseUint64s(strs, true, false)
|
|
case reflect.Float64:
|
|
vals, err = key.parseFloat64s(strs, true, false)
|
|
case reflectTime:
|
|
vals, err = key.parseTimesFormat(time.RFC3339, strs, true, false)
|
|
default:
|
|
return fmt.Errorf("unsupported type '[]%s'", sliceOf)
|
|
}
|
|
if err != nil && isStrict {
|
|
return err
|
|
}
|
|
|
|
slice := reflect.MakeSlice(field.Type(), numVals, numVals)
|
|
for i := 0; i < numVals; i++ {
|
|
switch sliceOf {
|
|
case reflect.String:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]string)[i]))
|
|
case reflect.Int:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]int)[i]))
|
|
case reflect.Int64:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]int64)[i]))
|
|
case reflect.Uint:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]uint)[i]))
|
|
case reflect.Uint64:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]uint64)[i]))
|
|
case reflect.Float64:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]float64)[i]))
|
|
case reflectTime:
|
|
slice.Index(i).Set(reflect.ValueOf(vals.([]time.Time)[i]))
|
|
}
|
|
}
|
|
field.Set(slice)
|
|
return nil
|
|
}
|
|
|
|
func wrapStrictError(err error, isStrict bool) error {
|
|
if isStrict {
|
|
return err
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// setWithProperType sets proper value to field based on its type,
|
|
// but it does not return error for failing parsing,
|
|
// because we want to use default value that is already assigned to strcut.
|
|
func setWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string, allowShadow, isStrict bool) error {
|
|
switch t.Kind() {
|
|
case reflect.String:
|
|
if len(key.String()) == 0 {
|
|
return nil
|
|
}
|
|
field.SetString(key.String())
|
|
case reflect.Bool:
|
|
boolVal, err := key.Bool()
|
|
if err != nil {
|
|
return wrapStrictError(err, isStrict)
|
|
}
|
|
field.SetBool(boolVal)
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
durationVal, err := key.Duration()
|
|
// Skip zero value
|
|
if err == nil && int64(durationVal) > 0 {
|
|
field.Set(reflect.ValueOf(durationVal))
|
|
return nil
|
|
}
|
|
|
|
intVal, err := key.Int64()
|
|
if err != nil {
|
|
return wrapStrictError(err, isStrict)
|
|
}
|
|
field.SetInt(intVal)
|
|
// byte is an alias for uint8, so supporting uint8 breaks support for byte
|
|
case reflect.Uint, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
durationVal, err := key.Duration()
|
|
// Skip zero value
|
|
if err == nil && uint64(durationVal) > 0 {
|
|
field.Set(reflect.ValueOf(durationVal))
|
|
return nil
|
|
}
|
|
|
|
uintVal, err := key.Uint64()
|
|
if err != nil {
|
|
return wrapStrictError(err, isStrict)
|
|
}
|
|
field.SetUint(uintVal)
|
|
|
|
case reflect.Float32, reflect.Float64:
|
|
floatVal, err := key.Float64()
|
|
if err != nil {
|
|
return wrapStrictError(err, isStrict)
|
|
}
|
|
field.SetFloat(floatVal)
|
|
case reflectTime:
|
|
timeVal, err := key.Time()
|
|
if err != nil {
|
|
return wrapStrictError(err, isStrict)
|
|
}
|
|
field.Set(reflect.ValueOf(timeVal))
|
|
case reflect.Slice:
|
|
return setSliceWithProperType(key, field, delim, allowShadow, isStrict)
|
|
default:
|
|
return fmt.Errorf("unsupported type '%s'", t)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func parseTagOptions(tag string) (rawName string, omitEmpty bool, allowShadow bool) {
|
|
opts := strings.SplitN(tag, ",", 3)
|
|
rawName = opts[0]
|
|
if len(opts) > 1 {
|
|
omitEmpty = opts[1] == "omitempty"
|
|
}
|
|
if len(opts) > 2 {
|
|
allowShadow = opts[2] == "allowshadow"
|
|
}
|
|
return rawName, omitEmpty, allowShadow
|
|
}
|
|
|
|
func (s *Section) mapTo(val reflect.Value, isStrict bool) error {
|
|
if val.Kind() == reflect.Ptr {
|
|
val = val.Elem()
|
|
}
|
|
typ := val.Type()
|
|
|
|
for i := 0; i < typ.NumField(); i++ {
|
|
field := val.Field(i)
|
|
tpField := typ.Field(i)
|
|
|
|
tag := tpField.Tag.Get("ini")
|
|
if tag == "-" {
|
|
continue
|
|
}
|
|
|
|
rawName, _, allowShadow := parseTagOptions(tag)
|
|
fieldName := s.parseFieldName(tpField.Name, rawName)
|
|
if len(fieldName) == 0 || !field.CanSet() {
|
|
continue
|
|
}
|
|
|
|
isAnonymous := tpField.Type.Kind() == reflect.Ptr && tpField.Anonymous
|
|
isStruct := tpField.Type.Kind() == reflect.Struct
|
|
if isAnonymous {
|
|
field.Set(reflect.New(tpField.Type.Elem()))
|
|
}
|
|
|
|
if isAnonymous || isStruct {
|
|
if sec, err := s.f.GetSection(fieldName); err == nil {
|
|
if err = sec.mapTo(field, isStrict); err != nil {
|
|
return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
|
|
}
|
|
continue
|
|
}
|
|
}
|
|
|
|
if key, err := s.GetKey(fieldName); err == nil {
|
|
delim := parseDelim(tpField.Tag.Get("delim"))
|
|
if err = setWithProperType(tpField.Type, key, field, delim, allowShadow, isStrict); err != nil {
|
|
return fmt.Errorf("error mapping field(%s): %v", fieldName, err)
|
|
}
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// MapTo maps section to given struct.
|
|
func (s *Section) MapTo(v interface{}) error {
|
|
typ := reflect.TypeOf(v)
|
|
val := reflect.ValueOf(v)
|
|
if typ.Kind() == reflect.Ptr {
|
|
typ = typ.Elem()
|
|
val = val.Elem()
|
|
} else {
|
|
return errors.New("cannot map to non-pointer struct")
|
|
}
|
|
|
|
return s.mapTo(val, false)
|
|
}
|
|
|
|
// MapTo maps section to given struct in strict mode,
|
|
// which returns all possible error including value parsing error.
|
|
func (s *Section) StrictMapTo(v interface{}) error {
|
|
typ := reflect.TypeOf(v)
|
|
val := reflect.ValueOf(v)
|
|
if typ.Kind() == reflect.Ptr {
|
|
typ = typ.Elem()
|
|
val = val.Elem()
|
|
} else {
|
|
return errors.New("cannot map to non-pointer struct")
|
|
}
|
|
|
|
return s.mapTo(val, true)
|
|
}
|
|
|
|
// MapTo maps file to given struct.
|
|
func (f *File) MapTo(v interface{}) error {
|
|
return f.Section("").MapTo(v)
|
|
}
|
|
|
|
// MapTo maps file to given struct in strict mode,
|
|
// which returns all possible error including value parsing error.
|
|
func (f *File) StrictMapTo(v interface{}) error {
|
|
return f.Section("").StrictMapTo(v)
|
|
}
|
|
|
|
// MapTo maps data sources to given struct with name mapper.
|
|
func MapToWithMapper(v interface{}, mapper NameMapper, source interface{}, others ...interface{}) error {
|
|
cfg, err := Load(source, others...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
cfg.NameMapper = mapper
|
|
return cfg.MapTo(v)
|
|
}
|
|
|
|
// StrictMapToWithMapper maps data sources to given struct with name mapper in strict mode,
|
|
// which returns all possible error including value parsing error.
|
|
func StrictMapToWithMapper(v interface{}, mapper NameMapper, source interface{}, others ...interface{}) error {
|
|
cfg, err := Load(source, others...)
|
|
if err != nil {
|
|
return err
|
|
}
|
|
cfg.NameMapper = mapper
|
|
return cfg.StrictMapTo(v)
|
|
}
|
|
|
|
// MapTo maps data sources to given struct.
|
|
func MapTo(v, source interface{}, others ...interface{}) error {
|
|
return MapToWithMapper(v, nil, source, others...)
|
|
}
|
|
|
|
// StrictMapTo maps data sources to given struct in strict mode,
|
|
// which returns all possible error including value parsing error.
|
|
func StrictMapTo(v, source interface{}, others ...interface{}) error {
|
|
return StrictMapToWithMapper(v, nil, source, others...)
|
|
}
|
|
|
|
// reflectSliceWithProperType does the opposite thing as setSliceWithProperType.
|
|
func reflectSliceWithProperType(key *Key, field reflect.Value, delim string) error {
|
|
slice := field.Slice(0, field.Len())
|
|
if field.Len() == 0 {
|
|
return nil
|
|
}
|
|
|
|
var buf bytes.Buffer
|
|
sliceOf := field.Type().Elem().Kind()
|
|
for i := 0; i < field.Len(); i++ {
|
|
switch sliceOf {
|
|
case reflect.String:
|
|
buf.WriteString(slice.Index(i).String())
|
|
case reflect.Int, reflect.Int64:
|
|
buf.WriteString(fmt.Sprint(slice.Index(i).Int()))
|
|
case reflect.Uint, reflect.Uint64:
|
|
buf.WriteString(fmt.Sprint(slice.Index(i).Uint()))
|
|
case reflect.Float64:
|
|
buf.WriteString(fmt.Sprint(slice.Index(i).Float()))
|
|
case reflectTime:
|
|
buf.WriteString(slice.Index(i).Interface().(time.Time).Format(time.RFC3339))
|
|
default:
|
|
return fmt.Errorf("unsupported type '[]%s'", sliceOf)
|
|
}
|
|
buf.WriteString(delim)
|
|
}
|
|
key.SetValue(buf.String()[:buf.Len()-1])
|
|
return nil
|
|
}
|
|
|
|
// reflectWithProperType does the opposite thing as setWithProperType.
|
|
func reflectWithProperType(t reflect.Type, key *Key, field reflect.Value, delim string) error {
|
|
switch t.Kind() {
|
|
case reflect.String:
|
|
key.SetValue(field.String())
|
|
case reflect.Bool:
|
|
key.SetValue(fmt.Sprint(field.Bool()))
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
key.SetValue(fmt.Sprint(field.Int()))
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64:
|
|
key.SetValue(fmt.Sprint(field.Uint()))
|
|
case reflect.Float32, reflect.Float64:
|
|
key.SetValue(fmt.Sprint(field.Float()))
|
|
case reflectTime:
|
|
key.SetValue(fmt.Sprint(field.Interface().(time.Time).Format(time.RFC3339)))
|
|
case reflect.Slice:
|
|
return reflectSliceWithProperType(key, field, delim)
|
|
default:
|
|
return fmt.Errorf("unsupported type '%s'", t)
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// CR: copied from encoding/json/encode.go with modifications of time.Time support.
|
|
// TODO: add more test coverage.
|
|
func isEmptyValue(v reflect.Value) bool {
|
|
switch v.Kind() {
|
|
case reflect.Array, reflect.Map, reflect.Slice, reflect.String:
|
|
return v.Len() == 0
|
|
case reflect.Bool:
|
|
return !v.Bool()
|
|
case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
|
|
return v.Int() == 0
|
|
case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
|
|
return v.Uint() == 0
|
|
case reflect.Float32, reflect.Float64:
|
|
return v.Float() == 0
|
|
case reflect.Interface, reflect.Ptr:
|
|
return v.IsNil()
|
|
case reflectTime:
|
|
t, ok := v.Interface().(time.Time)
|
|
return ok && t.IsZero()
|
|
}
|
|
return false
|
|
}
|
|
|
|
func (s *Section) reflectFrom(val reflect.Value) error {
|
|
if val.Kind() == reflect.Ptr {
|
|
val = val.Elem()
|
|
}
|
|
typ := val.Type()
|
|
|
|
for i := 0; i < typ.NumField(); i++ {
|
|
field := val.Field(i)
|
|
tpField := typ.Field(i)
|
|
|
|
tag := tpField.Tag.Get("ini")
|
|
if tag == "-" {
|
|
continue
|
|
}
|
|
|
|
opts := strings.SplitN(tag, ",", 2)
|
|
if len(opts) == 2 && opts[1] == "omitempty" && isEmptyValue(field) {
|
|
continue
|
|
}
|
|
|
|
fieldName := s.parseFieldName(tpField.Name, opts[0])
|
|
if len(fieldName) == 0 || !field.CanSet() {
|
|
continue
|
|
}
|
|
|
|
if (tpField.Type.Kind() == reflect.Ptr && tpField.Anonymous) ||
|
|
(tpField.Type.Kind() == reflect.Struct && tpField.Type.Name() != "Time") {
|
|
// Note: The only error here is section doesn't exist.
|
|
sec, err := s.f.GetSection(fieldName)
|
|
if err != nil {
|
|
// Note: fieldName can never be empty here, ignore error.
|
|
sec, _ = s.f.NewSection(fieldName)
|
|
}
|
|
|
|
// Add comment from comment tag
|
|
if len(sec.Comment) == 0 {
|
|
sec.Comment = tpField.Tag.Get("comment")
|
|
}
|
|
|
|
if err = sec.reflectFrom(field); err != nil {
|
|
return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
|
|
}
|
|
continue
|
|
}
|
|
|
|
// Note: Same reason as secion.
|
|
key, err := s.GetKey(fieldName)
|
|
if err != nil {
|
|
key, _ = s.NewKey(fieldName, "")
|
|
}
|
|
|
|
// Add comment from comment tag
|
|
if len(key.Comment) == 0 {
|
|
key.Comment = tpField.Tag.Get("comment")
|
|
}
|
|
|
|
if err = reflectWithProperType(tpField.Type, key, field, parseDelim(tpField.Tag.Get("delim"))); err != nil {
|
|
return fmt.Errorf("error reflecting field (%s): %v", fieldName, err)
|
|
}
|
|
|
|
}
|
|
return nil
|
|
}
|
|
|
|
// ReflectFrom reflects secion from given struct.
|
|
func (s *Section) ReflectFrom(v interface{}) error {
|
|
typ := reflect.TypeOf(v)
|
|
val := reflect.ValueOf(v)
|
|
if typ.Kind() == reflect.Ptr {
|
|
typ = typ.Elem()
|
|
val = val.Elem()
|
|
} else {
|
|
return errors.New("cannot reflect from non-pointer struct")
|
|
}
|
|
|
|
return s.reflectFrom(val)
|
|
}
|
|
|
|
// ReflectFrom reflects file from given struct.
|
|
func (f *File) ReflectFrom(v interface{}) error {
|
|
return f.Section("").ReflectFrom(v)
|
|
}
|
|
|
|
// ReflectFrom reflects data sources from given struct with name mapper.
|
|
func ReflectFromWithMapper(cfg *File, v interface{}, mapper NameMapper) error {
|
|
cfg.NameMapper = mapper
|
|
return cfg.ReflectFrom(v)
|
|
}
|
|
|
|
// ReflectFrom reflects data sources from given struct.
|
|
func ReflectFrom(cfg *File, v interface{}) error {
|
|
return ReflectFromWithMapper(cfg, v, nil)
|
|
}
|