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gob: clean up getTypeInfo (address a TODO)

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also fix a caching bug.

R=rsc
CC=golang-dev
https://golang.org/cl/4261049
This commit is contained in:
Rob Pike 2011-03-06 10:50:07 -08:00
parent 255b538152
commit 9e25eccf48
1 changed files with 29 additions and 37 deletions
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66
src/pkg/gob/type.go
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@ -638,55 +638,47 @@ var typeInfoMap = make(map[reflect.Type]*typeInfo) // protected by typeLock
// typeLock must be held.
func getTypeInfo(ut *userTypeInfo) (*typeInfo, os.Error) {
rt := ut.base
if ut.isGobEncoder {
// We want the user type, not the base type.
rt = ut.user
}
info, ok := typeInfoMap[rt]
if ok {
return info, nil
}
info = new(typeInfo)
gt, err := getBaseType(rt.Name(), rt)
if err != nil {
return nil, err
}
info.id = gt.id()
if ut.isGobEncoder {
// TODO: clean up this code - too much duplication.
info, ok := typeInfoMap[ut.user]
if ok {
return info, nil
}
// We want the user type, not the base type.
userType, err := getType(ut.user.Name(), ut, ut.user)
userType, err := getType(rt.Name(), ut, rt)
if err != nil {
return nil, err
}
info = new(typeInfo)
gt, err := getBaseType(ut.base.Name(), ut.base)
if err != nil {
return nil, err
}
info.id = gt.id()
info.wire = &wireType{GobEncoderT: userType.id().gobType().(*gobEncoderType)}
typeInfoMap[ut.user] = info
return info, nil
}
base := ut.base
info, ok := typeInfoMap[base]
if !ok {
info = new(typeInfo)
name := base.Name()
gt, err := getBaseType(name, base)
if err != nil {
return nil, err
t := info.id.gobType()
switch typ := rt.(type) {
case *reflect.ArrayType:
info.wire = &wireType{ArrayT: t.(*arrayType)}
case *reflect.MapType:
info.wire = &wireType{MapT: t.(*mapType)}
case *reflect.SliceType:
// []byte == []uint8 is a special case handled separately
if typ.Elem().Kind() != reflect.Uint8 {
info.wire = &wireType{SliceT: t.(*sliceType)}
}
info.id = gt.id()
t := info.id.gobType()
switch typ := base.(type) {
case *reflect.ArrayType:
info.wire = &wireType{ArrayT: t.(*arrayType)}
case *reflect.MapType:
info.wire = &wireType{MapT: t.(*mapType)}
case *reflect.SliceType:
// []byte == []uint8 is a special case handled separately
if typ.Elem().Kind() != reflect.Uint8 {
info.wire = &wireType{SliceT: t.(*sliceType)}
}
case *reflect.StructType:
info.wire = &wireType{StructT: t.(*structType)}
}
typeInfoMap[base] = info
case *reflect.StructType:
info.wire = &wireType{StructT: t.(*structType)}
}
typeInfoMap[rt] = info
return info, nil
}