diff options
Diffstat (limited to 'internal/impl/codec_map.go')
| -rw-r--r-- | internal/impl/codec_map.go | 388 |
1 files changed, 0 insertions, 388 deletions
diff --git a/internal/impl/codec_map.go b/internal/impl/codec_map.go deleted file mode 100644 index c1245fef..00000000 --- a/internal/impl/codec_map.go +++ /dev/null @@ -1,388 +0,0 @@ -// Copyright 2019 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -package impl - -import ( - "reflect" - "sort" - - "google.golang.org/protobuf/encoding/protowire" - "google.golang.org/protobuf/internal/genid" - pref "google.golang.org/protobuf/reflect/protoreflect" -) - -type mapInfo struct { - goType reflect.Type - keyWiretag uint64 - valWiretag uint64 - keyFuncs valueCoderFuncs - valFuncs valueCoderFuncs - keyZero pref.Value - keyKind pref.Kind - conv *mapConverter -} - -func encoderFuncsForMap(fd pref.FieldDescriptor, ft reflect.Type) (valueMessage *MessageInfo, funcs pointerCoderFuncs) { - // TODO: Consider generating specialized map coders. - keyField := fd.MapKey() - valField := fd.MapValue() - keyWiretag := protowire.EncodeTag(1, wireTypes[keyField.Kind()]) - valWiretag := protowire.EncodeTag(2, wireTypes[valField.Kind()]) - keyFuncs := encoderFuncsForValue(keyField) - valFuncs := encoderFuncsForValue(valField) - conv := newMapConverter(ft, fd) - - mapi := &mapInfo{ - goType: ft, - keyWiretag: keyWiretag, - valWiretag: valWiretag, - keyFuncs: keyFuncs, - valFuncs: valFuncs, - keyZero: keyField.Default(), - keyKind: keyField.Kind(), - conv: conv, - } - if valField.Kind() == pref.MessageKind { - valueMessage = getMessageInfo(ft.Elem()) - } - - funcs = pointerCoderFuncs{ - size: func(p pointer, f *coderFieldInfo, opts marshalOptions) int { - return sizeMap(p.AsValueOf(ft).Elem(), mapi, f, opts) - }, - marshal: func(b []byte, p pointer, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { - return appendMap(b, p.AsValueOf(ft).Elem(), mapi, f, opts) - }, - unmarshal: func(b []byte, p pointer, wtyp protowire.Type, f *coderFieldInfo, opts unmarshalOptions) (unmarshalOutput, error) { - mp := p.AsValueOf(ft) - if mp.Elem().IsNil() { - mp.Elem().Set(reflect.MakeMap(mapi.goType)) - } - if f.mi == nil { - return consumeMap(b, mp.Elem(), wtyp, mapi, f, opts) - } else { - return consumeMapOfMessage(b, mp.Elem(), wtyp, mapi, f, opts) - } - }, - } - switch valField.Kind() { - case pref.MessageKind: - funcs.merge = mergeMapOfMessage - case pref.BytesKind: - funcs.merge = mergeMapOfBytes - default: - funcs.merge = mergeMap - } - if valFuncs.isInit != nil { - funcs.isInit = func(p pointer, f *coderFieldInfo) error { - return isInitMap(p.AsValueOf(ft).Elem(), mapi, f) - } - } - return valueMessage, funcs -} - -const ( - mapKeyTagSize = 1 // field 1, tag size 1. - mapValTagSize = 1 // field 2, tag size 2. -) - -func sizeMap(mapv reflect.Value, mapi *mapInfo, f *coderFieldInfo, opts marshalOptions) int { - if mapv.Len() == 0 { - return 0 - } - n := 0 - iter := mapRange(mapv) - for iter.Next() { - key := mapi.conv.keyConv.PBValueOf(iter.Key()).MapKey() - keySize := mapi.keyFuncs.size(key.Value(), mapKeyTagSize, opts) - var valSize int - value := mapi.conv.valConv.PBValueOf(iter.Value()) - if f.mi == nil { - valSize = mapi.valFuncs.size(value, mapValTagSize, opts) - } else { - p := pointerOfValue(iter.Value()) - valSize += mapValTagSize - valSize += protowire.SizeBytes(f.mi.sizePointer(p, opts)) - } - n += f.tagsize + protowire.SizeBytes(keySize+valSize) - } - return n -} - -func consumeMap(b []byte, mapv reflect.Value, wtyp protowire.Type, mapi *mapInfo, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) { - if wtyp != protowire.BytesType { - return out, errUnknown - } - b, n := protowire.ConsumeBytes(b) - if n < 0 { - return out, errDecode - } - var ( - key = mapi.keyZero - val = mapi.conv.valConv.New() - ) - for len(b) > 0 { - num, wtyp, n := protowire.ConsumeTag(b) - if n < 0 { - return out, errDecode - } - if num > protowire.MaxValidNumber { - return out, errDecode - } - b = b[n:] - err := errUnknown - switch num { - case genid.MapEntry_Key_field_number: - var v pref.Value - var o unmarshalOutput - v, o, err = mapi.keyFuncs.unmarshal(b, key, num, wtyp, opts) - if err != nil { - break - } - key = v - n = o.n - case genid.MapEntry_Value_field_number: - var v pref.Value - var o unmarshalOutput - v, o, err = mapi.valFuncs.unmarshal(b, val, num, wtyp, opts) - if err != nil { - break - } - val = v - n = o.n - } - if err == errUnknown { - n = protowire.ConsumeFieldValue(num, wtyp, b) - if n < 0 { - return out, errDecode - } - } else if err != nil { - return out, err - } - b = b[n:] - } - mapv.SetMapIndex(mapi.conv.keyConv.GoValueOf(key), mapi.conv.valConv.GoValueOf(val)) - out.n = n - return out, nil -} - -func consumeMapOfMessage(b []byte, mapv reflect.Value, wtyp protowire.Type, mapi *mapInfo, f *coderFieldInfo, opts unmarshalOptions) (out unmarshalOutput, err error) { - if wtyp != protowire.BytesType { - return out, errUnknown - } - b, n := protowire.ConsumeBytes(b) - if n < 0 { - return out, errDecode - } - var ( - key = mapi.keyZero - val = reflect.New(f.mi.GoReflectType.Elem()) - ) - for len(b) > 0 { - num, wtyp, n := protowire.ConsumeTag(b) - if n < 0 { - return out, errDecode - } - if num > protowire.MaxValidNumber { - return out, errDecode - } - b = b[n:] - err := errUnknown - switch num { - case 1: - var v pref.Value - var o unmarshalOutput - v, o, err = mapi.keyFuncs.unmarshal(b, key, num, wtyp, opts) - if err != nil { - break - } - key = v - n = o.n - case 2: - if wtyp != protowire.BytesType { - break - } - var v []byte - v, n = protowire.ConsumeBytes(b) - if n < 0 { - return out, errDecode - } - var o unmarshalOutput - o, err = f.mi.unmarshalPointer(v, pointerOfValue(val), 0, opts) - if o.initialized { - // Consider this map item initialized so long as we see - // an initialized value. - out.initialized = true - } - } - if err == errUnknown { - n = protowire.ConsumeFieldValue(num, wtyp, b) - if n < 0 { - return out, errDecode - } - } else if err != nil { - return out, err - } - b = b[n:] - } - mapv.SetMapIndex(mapi.conv.keyConv.GoValueOf(key), val) - out.n = n - return out, nil -} - -func appendMapItem(b []byte, keyrv, valrv reflect.Value, mapi *mapInfo, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { - if f.mi == nil { - key := mapi.conv.keyConv.PBValueOf(keyrv).MapKey() - val := mapi.conv.valConv.PBValueOf(valrv) - size := 0 - size += mapi.keyFuncs.size(key.Value(), mapKeyTagSize, opts) - size += mapi.valFuncs.size(val, mapValTagSize, opts) - b = protowire.AppendVarint(b, uint64(size)) - b, err := mapi.keyFuncs.marshal(b, key.Value(), mapi.keyWiretag, opts) - if err != nil { - return nil, err - } - return mapi.valFuncs.marshal(b, val, mapi.valWiretag, opts) - } else { - key := mapi.conv.keyConv.PBValueOf(keyrv).MapKey() - val := pointerOfValue(valrv) - valSize := f.mi.sizePointer(val, opts) - size := 0 - size += mapi.keyFuncs.size(key.Value(), mapKeyTagSize, opts) - size += mapValTagSize + protowire.SizeBytes(valSize) - b = protowire.AppendVarint(b, uint64(size)) - b, err := mapi.keyFuncs.marshal(b, key.Value(), mapi.keyWiretag, opts) - if err != nil { - return nil, err - } - b = protowire.AppendVarint(b, mapi.valWiretag) - b = protowire.AppendVarint(b, uint64(valSize)) - return f.mi.marshalAppendPointer(b, val, opts) - } -} - -func appendMap(b []byte, mapv reflect.Value, mapi *mapInfo, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { - if mapv.Len() == 0 { - return b, nil - } - if opts.Deterministic() { - return appendMapDeterministic(b, mapv, mapi, f, opts) - } - iter := mapRange(mapv) - for iter.Next() { - var err error - b = protowire.AppendVarint(b, f.wiretag) - b, err = appendMapItem(b, iter.Key(), iter.Value(), mapi, f, opts) - if err != nil { - return b, err - } - } - return b, nil -} - -func appendMapDeterministic(b []byte, mapv reflect.Value, mapi *mapInfo, f *coderFieldInfo, opts marshalOptions) ([]byte, error) { - keys := mapv.MapKeys() - sort.Slice(keys, func(i, j int) bool { - switch keys[i].Kind() { - case reflect.Bool: - return !keys[i].Bool() && keys[j].Bool() - case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64: - return keys[i].Int() < keys[j].Int() - case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr: - return keys[i].Uint() < keys[j].Uint() - case reflect.Float32, reflect.Float64: - return keys[i].Float() < keys[j].Float() - case reflect.String: - return keys[i].String() < keys[j].String() - default: - panic("invalid kind: " + keys[i].Kind().String()) - } - }) - for _, key := range keys { - var err error - b = protowire.AppendVarint(b, f.wiretag) - b, err = appendMapItem(b, key, mapv.MapIndex(key), mapi, f, opts) - if err != nil { - return b, err - } - } - return b, nil -} - -func isInitMap(mapv reflect.Value, mapi *mapInfo, f *coderFieldInfo) error { - if mi := f.mi; mi != nil { - mi.init() - if !mi.needsInitCheck { - return nil - } - iter := mapRange(mapv) - for iter.Next() { - val := pointerOfValue(iter.Value()) - if err := mi.checkInitializedPointer(val); err != nil { - return err - } - } - } else { - iter := mapRange(mapv) - for iter.Next() { - val := mapi.conv.valConv.PBValueOf(iter.Value()) - if err := mapi.valFuncs.isInit(val); err != nil { - return err - } - } - } - return nil -} - -func mergeMap(dst, src pointer, f *coderFieldInfo, opts mergeOptions) { - dstm := dst.AsValueOf(f.ft).Elem() - srcm := src.AsValueOf(f.ft).Elem() - if srcm.Len() == 0 { - return - } - if dstm.IsNil() { - dstm.Set(reflect.MakeMap(f.ft)) - } - iter := mapRange(srcm) - for iter.Next() { - dstm.SetMapIndex(iter.Key(), iter.Value()) - } -} - -func mergeMapOfBytes(dst, src pointer, f *coderFieldInfo, opts mergeOptions) { - dstm := dst.AsValueOf(f.ft).Elem() - srcm := src.AsValueOf(f.ft).Elem() - if srcm.Len() == 0 { - return - } - if dstm.IsNil() { - dstm.Set(reflect.MakeMap(f.ft)) - } - iter := mapRange(srcm) - for iter.Next() { - dstm.SetMapIndex(iter.Key(), reflect.ValueOf(append(emptyBuf[:], iter.Value().Bytes()...))) - } -} - -func mergeMapOfMessage(dst, src pointer, f *coderFieldInfo, opts mergeOptions) { - dstm := dst.AsValueOf(f.ft).Elem() - srcm := src.AsValueOf(f.ft).Elem() - if srcm.Len() == 0 { - return - } - if dstm.IsNil() { - dstm.Set(reflect.MakeMap(f.ft)) - } - iter := mapRange(srcm) - for iter.Next() { - val := reflect.New(f.ft.Elem().Elem()) - if f.mi != nil { - f.mi.mergePointer(pointerOfValue(val), pointerOfValue(iter.Value()), opts) - } else { - opts.Merge(asMessage(val), asMessage(iter.Value())) - } - dstm.SetMapIndex(iter.Key(), val) - } -} |