diff options
Diffstat (limited to 'vendor/github.com/golang/protobuf/proto/table_unmarshal.go')
| -rw-r--r-- | vendor/github.com/golang/protobuf/proto/table_unmarshal.go | 2051 |
1 files changed, 0 insertions, 2051 deletions
diff --git a/vendor/github.com/golang/protobuf/proto/table_unmarshal.go b/vendor/github.com/golang/protobuf/proto/table_unmarshal.go deleted file mode 100644 index ebf1caa5..00000000 --- a/vendor/github.com/golang/protobuf/proto/table_unmarshal.go +++ /dev/null @@ -1,2051 +0,0 @@ -// Go support for Protocol Buffers - Google's data interchange format -// -// Copyright 2016 The Go Authors. All rights reserved. -// https://github.com/golang/protobuf -// -// Redistribution and use in source and binary forms, with or without -// modification, are permitted provided that the following conditions are -// met: -// -// * Redistributions of source code must retain the above copyright -// notice, this list of conditions and the following disclaimer. -// * Redistributions in binary form must reproduce the above -// copyright notice, this list of conditions and the following disclaimer -// in the documentation and/or other materials provided with the -// distribution. -// * Neither the name of Google Inc. nor the names of its -// contributors may be used to endorse or promote products derived from -// this software without specific prior written permission. -// -// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS -// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT -// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR -// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT -// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, -// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT -// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, -// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY -// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT -// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE -// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. - -package proto - -import ( - "errors" - "fmt" - "io" - "math" - "reflect" - "strconv" - "strings" - "sync" - "sync/atomic" - "unicode/utf8" -) - -// Unmarshal is the entry point from the generated .pb.go files. -// This function is not intended to be used by non-generated code. -// This function is not subject to any compatibility guarantee. -// msg contains a pointer to a protocol buffer struct. -// b is the data to be unmarshaled into the protocol buffer. -// a is a pointer to a place to store cached unmarshal information. -func (a *InternalMessageInfo) Unmarshal(msg Message, b []byte) error { - // Load the unmarshal information for this message type. - // The atomic load ensures memory consistency. - u := atomicLoadUnmarshalInfo(&a.unmarshal) - if u == nil { - // Slow path: find unmarshal info for msg, update a with it. - u = getUnmarshalInfo(reflect.TypeOf(msg).Elem()) - atomicStoreUnmarshalInfo(&a.unmarshal, u) - } - // Then do the unmarshaling. - err := u.unmarshal(toPointer(&msg), b) - return err -} - -type unmarshalInfo struct { - typ reflect.Type // type of the protobuf struct - - // 0 = only typ field is initialized - // 1 = completely initialized - initialized int32 - lock sync.Mutex // prevents double initialization - dense []unmarshalFieldInfo // fields indexed by tag # - sparse map[uint64]unmarshalFieldInfo // fields indexed by tag # - reqFields []string // names of required fields - reqMask uint64 // 1<<len(reqFields)-1 - unrecognized field // offset of []byte to put unrecognized data (or invalidField if we should throw it away) - extensions field // offset of extensions field (of type proto.XXX_InternalExtensions), or invalidField if it does not exist - oldExtensions field // offset of old-form extensions field (of type map[int]Extension) - extensionRanges []ExtensionRange // if non-nil, implies extensions field is valid - isMessageSet bool // if true, implies extensions field is valid -} - -// An unmarshaler takes a stream of bytes and a pointer to a field of a message. -// It decodes the field, stores it at f, and returns the unused bytes. -// w is the wire encoding. -// b is the data after the tag and wire encoding have been read. -type unmarshaler func(b []byte, f pointer, w int) ([]byte, error) - -type unmarshalFieldInfo struct { - // location of the field in the proto message structure. - field field - - // function to unmarshal the data for the field. - unmarshal unmarshaler - - // if a required field, contains a single set bit at this field's index in the required field list. - reqMask uint64 - - name string // name of the field, for error reporting -} - -var ( - unmarshalInfoMap = map[reflect.Type]*unmarshalInfo{} - unmarshalInfoLock sync.Mutex -) - -// getUnmarshalInfo returns the data structure which can be -// subsequently used to unmarshal a message of the given type. -// t is the type of the message (note: not pointer to message). -func getUnmarshalInfo(t reflect.Type) *unmarshalInfo { - // It would be correct to return a new unmarshalInfo - // unconditionally. We would end up allocating one - // per occurrence of that type as a message or submessage. - // We use a cache here just to reduce memory usage. - unmarshalInfoLock.Lock() - defer unmarshalInfoLock.Unlock() - u := unmarshalInfoMap[t] - if u == nil { - u = &unmarshalInfo{typ: t} - // Note: we just set the type here. The rest of the fields - // will be initialized on first use. - unmarshalInfoMap[t] = u - } - return u -} - -// unmarshal does the main work of unmarshaling a message. -// u provides type information used to unmarshal the message. -// m is a pointer to a protocol buffer message. -// b is a byte stream to unmarshal into m. -// This is top routine used when recursively unmarshaling submessages. -func (u *unmarshalInfo) unmarshal(m pointer, b []byte) error { - if atomic.LoadInt32(&u.initialized) == 0 { - u.computeUnmarshalInfo() - } - if u.isMessageSet { - return UnmarshalMessageSet(b, m.offset(u.extensions).toExtensions()) - } - var reqMask uint64 // bitmask of required fields we've seen. - var errLater error - for len(b) > 0 { - // Read tag and wire type. - // Special case 1 and 2 byte varints. - var x uint64 - if b[0] < 128 { - x = uint64(b[0]) - b = b[1:] - } else if len(b) >= 2 && b[1] < 128 { - x = uint64(b[0]&0x7f) + uint64(b[1])<<7 - b = b[2:] - } else { - var n int - x, n = decodeVarint(b) - if n == 0 { - return io.ErrUnexpectedEOF - } - b = b[n:] - } - tag := x >> 3 - wire := int(x) & 7 - - // Dispatch on the tag to one of the unmarshal* functions below. - var f unmarshalFieldInfo - if tag < uint64(len(u.dense)) { - f = u.dense[tag] - } else { - f = u.sparse[tag] - } - if fn := f.unmarshal; fn != nil { - var err error - b, err = fn(b, m.offset(f.field), wire) - if err == nil { - reqMask |= f.reqMask - continue - } - if r, ok := err.(*RequiredNotSetError); ok { - // Remember this error, but keep parsing. We need to produce - // a full parse even if a required field is missing. - if errLater == nil { - errLater = r - } - reqMask |= f.reqMask - continue - } - if err != errInternalBadWireType { - if err == errInvalidUTF8 { - if errLater == nil { - fullName := revProtoTypes[reflect.PtrTo(u.typ)] + "." + f.name - errLater = &invalidUTF8Error{fullName} - } - continue - } - return err - } - // Fragments with bad wire type are treated as unknown fields. - } - - // Unknown tag. - if !u.unrecognized.IsValid() { - // Don't keep unrecognized data; just skip it. - var err error - b, err = skipField(b, wire) - if err != nil { - return err - } - continue - } - // Keep unrecognized data around. - // maybe in extensions, maybe in the unrecognized field. - z := m.offset(u.unrecognized).toBytes() - var emap map[int32]Extension - var e Extension - for _, r := range u.extensionRanges { - if uint64(r.Start) <= tag && tag <= uint64(r.End) { - if u.extensions.IsValid() { - mp := m.offset(u.extensions).toExtensions() - emap = mp.extensionsWrite() - e = emap[int32(tag)] - z = &e.enc - break - } - if u.oldExtensions.IsValid() { - p := m.offset(u.oldExtensions).toOldExtensions() - emap = *p - if emap == nil { - emap = map[int32]Extension{} - *p = emap - } - e = emap[int32(tag)] - z = &e.enc - break - } - panic("no extensions field available") - } - } - - // Use wire type to skip data. - var err error - b0 := b - b, err = skipField(b, wire) - if err != nil { - return err - } - *z = encodeVarint(*z, tag<<3|uint64(wire)) - *z = append(*z, b0[:len(b0)-len(b)]...) - - if emap != nil { - emap[int32(tag)] = e - } - } - if reqMask != u.reqMask && errLater == nil { - // A required field of this message is missing. - for _, n := range u.reqFields { - if reqMask&1 == 0 { - errLater = &RequiredNotSetError{n} - } - reqMask >>= 1 - } - } - return errLater -} - -// computeUnmarshalInfo fills in u with information for use -// in unmarshaling protocol buffers of type u.typ. -func (u *unmarshalInfo) computeUnmarshalInfo() { - u.lock.Lock() - defer u.lock.Unlock() - if u.initialized != 0 { - return - } - t := u.typ - n := t.NumField() - - // Set up the "not found" value for the unrecognized byte buffer. - // This is the default for proto3. - u.unrecognized = invalidField - u.extensions = invalidField - u.oldExtensions = invalidField - - // List of the generated type and offset for each oneof field. - type oneofField struct { - ityp reflect.Type // interface type of oneof field - field field // offset in containing message - } - var oneofFields []oneofField - - for i := 0; i < n; i++ { - f := t.Field(i) - if f.Name == "XXX_unrecognized" { - // The byte slice used to hold unrecognized input is special. - if f.Type != reflect.TypeOf(([]byte)(nil)) { - panic("bad type for XXX_unrecognized field: " + f.Type.Name()) - } - u.unrecognized = toField(&f) - continue - } - if f.Name == "XXX_InternalExtensions" { - // Ditto here. - if f.Type != reflect.TypeOf(XXX_InternalExtensions{}) { - panic("bad type for XXX_InternalExtensions field: " + f.Type.Name()) - } - u.extensions = toField(&f) - if f.Tag.Get("protobuf_messageset") == "1" { - u.isMessageSet = true - } - continue - } - if f.Name == "XXX_extensions" { - // An older form of the extensions field. - if f.Type != reflect.TypeOf((map[int32]Extension)(nil)) { - panic("bad type for XXX_extensions field: " + f.Type.Name()) - } - u.oldExtensions = toField(&f) - continue - } - if f.Name == "XXX_NoUnkeyedLiteral" || f.Name == "XXX_sizecache" { - continue - } - - oneof := f.Tag.Get("protobuf_oneof") - if oneof != "" { - oneofFields = append(oneofFields, oneofField{f.Type, toField(&f)}) - // The rest of oneof processing happens below. - continue - } - - tags := f.Tag.Get("protobuf") - tagArray := strings.Split(tags, ",") - if len(tagArray) < 2 { - panic("protobuf tag not enough fields in " + t.Name() + "." + f.Name + ": " + tags) - } - tag, err := strconv.Atoi(tagArray[1]) - if err != nil { - panic("protobuf tag field not an integer: " + tagArray[1]) - } - - name := "" - for _, tag := range tagArray[3:] { - if strings.HasPrefix(tag, "name=") { - name = tag[5:] - } - } - - // Extract unmarshaling function from the field (its type and tags). - unmarshal := fieldUnmarshaler(&f) - - // Required field? - var reqMask uint64 - if tagArray[2] == "req" { - bit := len(u.reqFields) - u.reqFields = append(u.reqFields, name) - reqMask = uint64(1) << uint(bit) - // TODO: if we have more than 64 required fields, we end up - // not verifying that all required fields are present. - // Fix this, perhaps using a count of required fields? - } - - // Store the info in the correct slot in the message. - u.setTag(tag, toField(&f), unmarshal, reqMask, name) - } - - // Find any types associated with oneof fields. - // TODO: XXX_OneofFuncs returns more info than we need. Get rid of some of it? - fn := reflect.Zero(reflect.PtrTo(t)).MethodByName("XXX_OneofFuncs") - if fn.IsValid() { - res := fn.Call(nil)[3] // last return value from XXX_OneofFuncs: []interface{} - for i := res.Len() - 1; i >= 0; i-- { - v := res.Index(i) // interface{} - tptr := reflect.ValueOf(v.Interface()).Type() // *Msg_X - typ := tptr.Elem() // Msg_X - - f := typ.Field(0) // oneof implementers have one field - baseUnmarshal := fieldUnmarshaler(&f) - tags := strings.Split(f.Tag.Get("protobuf"), ",") - fieldNum, err := strconv.Atoi(tags[1]) - if err != nil { - panic("protobuf tag field not an integer: " + tags[1]) - } - var name string - for _, tag := range tags { - if strings.HasPrefix(tag, "name=") { - name = strings.TrimPrefix(tag, "name=") - break - } - } - - // Find the oneof field that this struct implements. - // Might take O(n^2) to process all of the oneofs, but who cares. - for _, of := range oneofFields { - if tptr.Implements(of.ityp) { - // We have found the corresponding interface for this struct. - // That lets us know where this struct should be stored - // when we encounter it during unmarshaling. - unmarshal := makeUnmarshalOneof(typ, of.ityp, baseUnmarshal) - u.setTag(fieldNum, of.field, unmarshal, 0, name) - } - } - } - } - - // Get extension ranges, if any. - fn = reflect.Zero(reflect.PtrTo(t)).MethodByName("ExtensionRangeArray") - if fn.IsValid() { - if !u.extensions.IsValid() && !u.oldExtensions.IsValid() { - panic("a message with extensions, but no extensions field in " + t.Name()) - } - u.extensionRanges = fn.Call(nil)[0].Interface().([]ExtensionRange) - } - - // Explicitly disallow tag 0. This will ensure we flag an error - // when decoding a buffer of all zeros. Without this code, we - // would decode and skip an all-zero buffer of even length. - // [0 0] is [tag=0/wiretype=varint varint-encoded-0]. - u.setTag(0, zeroField, func(b []byte, f pointer, w int) ([]byte, error) { - return nil, fmt.Errorf("proto: %s: illegal tag 0 (wire type %d)", t, w) - }, 0, "") - - // Set mask for required field check. - u.reqMask = uint64(1)<<uint(len(u.reqFields)) - 1 - - atomic.StoreInt32(&u.initialized, 1) -} - -// setTag stores the unmarshal information for the given tag. -// tag = tag # for field -// field/unmarshal = unmarshal info for that field. -// reqMask = if required, bitmask for field position in required field list. 0 otherwise. -// name = short name of the field. -func (u *unmarshalInfo) setTag(tag int, field field, unmarshal unmarshaler, reqMask uint64, name string) { - i := unmarshalFieldInfo{field: field, unmarshal: unmarshal, reqMask: reqMask, name: name} - n := u.typ.NumField() - if tag >= 0 && (tag < 16 || tag < 2*n) { // TODO: what are the right numbers here? - for len(u.dense) <= tag { - u.dense = append(u.dense, unmarshalFieldInfo{}) - } - u.dense[tag] = i - return - } - if u.sparse == nil { - u.sparse = map[uint64]unmarshalFieldInfo{} - } - u.sparse[uint64(tag)] = i -} - -// fieldUnmarshaler returns an unmarshaler for the given field. -func fieldUnmarshaler(f *reflect.StructField) unmarshaler { - if f.Type.Kind() == reflect.Map { - return makeUnmarshalMap(f) - } - return typeUnmarshaler(f.Type, f.Tag.Get("protobuf")) -} - -// typeUnmarshaler returns an unmarshaler for the given field type / field tag pair. -func typeUnmarshaler(t reflect.Type, tags string) unmarshaler { - tagArray := strings.Split(tags, ",") - encoding := tagArray[0] - name := "unknown" - proto3 := false - validateUTF8 := true - for _, tag := range tagArray[3:] { - if strings.HasPrefix(tag, "name=") { - name = tag[5:] - } - if tag == "proto3" { - proto3 = true - } - } - validateUTF8 = validateUTF8 && proto3 - - // Figure out packaging (pointer, slice, or both) - slice := false - pointer := false - if t.Kind() == reflect.Slice && t.Elem().Kind() != reflect.Uint8 { - slice = true - t = t.Elem() - } - if t.Kind() == reflect.Ptr { - pointer = true - t = t.Elem() - } - - // We'll never have both pointer and slice for basic types. - if pointer && slice && t.Kind() != reflect.Struct { - panic("both pointer and slice for basic type in " + t.Name()) - } - - switch t.Kind() { - case reflect.Bool: - if pointer { - return unmarshalBoolPtr - } - if slice { - return unmarshalBoolSlice - } - return unmarshalBoolValue - case reflect.Int32: - switch encoding { - case "fixed32": - if pointer { - return unmarshalFixedS32Ptr - } - if slice { - return unmarshalFixedS32Slice - } - return unmarshalFixedS32Value - case "varint": - // this could be int32 or enum - if pointer { - return unmarshalInt32Ptr - } - if slice { - return unmarshalInt32Slice - } - return unmarshalInt32Value - case "zigzag32": - if pointer { - return unmarshalSint32Ptr - } - if slice { - return unmarshalSint32Slice - } - return unmarshalSint32Value - } - case reflect.Int64: - switch encoding { - case "fixed64": - if pointer { - return unmarshalFixedS64Ptr - } - if slice { - return unmarshalFixedS64Slice - } - return unmarshalFixedS64Value - case "varint": - if pointer { - return unmarshalInt64Ptr - } - if slice { - return unmarshalInt64Slice - } - return unmarshalInt64Value - case "zigzag64": - if pointer { - return unmarshalSint64Ptr - } - if slice { - return unmarshalSint64Slice - } - return unmarshalSint64Value - } - case reflect.Uint32: - switch encoding { - case "fixed32": - if pointer { - return unmarshalFixed32Ptr - } - if slice { - return unmarshalFixed32Slice - } - return unmarshalFixed32Value - case "varint": - if pointer { - return unmarshalUint32Ptr - } - if slice { - return unmarshalUint32Slice - } - return unmarshalUint32Value - } - case reflect.Uint64: - switch encoding { - case "fixed64": - if pointer { - return unmarshalFixed64Ptr - } - if slice { - return unmarshalFixed64Slice - } - return unmarshalFixed64Value - case "varint": - if pointer { - return unmarshalUint64Ptr - } - if slice { - return unmarshalUint64Slice - } - return unmarshalUint64Value - } - case reflect.Float32: - if pointer { - return unmarshalFloat32Ptr - } - if slice { - return unmarshalFloat32Slice - } - return unmarshalFloat32Value - case reflect.Float64: - if pointer { - return unmarshalFloat64Ptr - } - if slice { - return unmarshalFloat64Slice - } - return unmarshalFloat64Value - case reflect.Map: - panic("map type in typeUnmarshaler in " + t.Name()) - case reflect.Slice: - if pointer { - panic("bad pointer in slice case in " + t.Name()) - } - if slice { - return unmarshalBytesSlice - } - return unmarshalBytesValue - case reflect.String: - if validateUTF8 { - if pointer { - return unmarshalUTF8StringPtr - } - if slice { - return unmarshalUTF8StringSlice - } - return unmarshalUTF8StringValue - } - if pointer { - return unmarshalStringPtr - } - if slice { - return unmarshalStringSlice - } - return unmarshalStringValue - case reflect.Struct: - // message or group field - if !pointer { - panic(fmt.Sprintf("message/group field %s:%s without pointer", t, encoding)) - } - switch encoding { - case "bytes": - if slice { - return makeUnmarshalMessageSlicePtr(getUnmarshalInfo(t), name) - } - return makeUnmarshalMessagePtr(getUnmarshalInfo(t), name) - case "group": - if slice { - return makeUnmarshalGroupSlicePtr(getUnmarshalInfo(t), name) - } - return makeUnmarshalGroupPtr(getUnmarshalInfo(t), name) - } - } - panic(fmt.Sprintf("unmarshaler not found type:%s encoding:%s", t, encoding)) -} - -// Below are all the unmarshalers for individual fields of various types. - -func unmarshalInt64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x) - *f.toInt64() = v - return b, nil -} - -func unmarshalInt64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x) - *f.toInt64Ptr() = &v - return b, nil -} - -func unmarshalInt64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x) - s := f.toInt64Slice() - *s = append(*s, v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x) - s := f.toInt64Slice() - *s = append(*s, v) - return b, nil -} - -func unmarshalSint64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x>>1) ^ int64(x)<<63>>63 - *f.toInt64() = v - return b, nil -} - -func unmarshalSint64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x>>1) ^ int64(x)<<63>>63 - *f.toInt64Ptr() = &v - return b, nil -} - -func unmarshalSint64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x>>1) ^ int64(x)<<63>>63 - s := f.toInt64Slice() - *s = append(*s, v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int64(x>>1) ^ int64(x)<<63>>63 - s := f.toInt64Slice() - *s = append(*s, v) - return b, nil -} - -func unmarshalUint64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint64(x) - *f.toUint64() = v - return b, nil -} - -func unmarshalUint64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint64(x) - *f.toUint64Ptr() = &v - return b, nil -} - -func unmarshalUint64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint64(x) - s := f.toUint64Slice() - *s = append(*s, v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint64(x) - s := f.toUint64Slice() - *s = append(*s, v) - return b, nil -} - -func unmarshalInt32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x) - *f.toInt32() = v - return b, nil -} - -func unmarshalInt32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x) - f.setInt32Ptr(v) - return b, nil -} - -func unmarshalInt32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x) - f.appendInt32Slice(v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x) - f.appendInt32Slice(v) - return b, nil -} - -func unmarshalSint32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x>>1) ^ int32(x)<<31>>31 - *f.toInt32() = v - return b, nil -} - -func unmarshalSint32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x>>1) ^ int32(x)<<31>>31 - f.setInt32Ptr(v) - return b, nil -} - -func unmarshalSint32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x>>1) ^ int32(x)<<31>>31 - f.appendInt32Slice(v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := int32(x>>1) ^ int32(x)<<31>>31 - f.appendInt32Slice(v) - return b, nil -} - -func unmarshalUint32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint32(x) - *f.toUint32() = v - return b, nil -} - -func unmarshalUint32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint32(x) - *f.toUint32Ptr() = &v - return b, nil -} - -func unmarshalUint32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint32(x) - s := f.toUint32Slice() - *s = append(*s, v) - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - v := uint32(x) - s := f.toUint32Slice() - *s = append(*s, v) - return b, nil -} - -func unmarshalFixed64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 - *f.toUint64() = v - return b[8:], nil -} - -func unmarshalFixed64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 - *f.toUint64Ptr() = &v - return b[8:], nil -} - -func unmarshalFixed64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 - s := f.toUint64Slice() - *s = append(*s, v) - b = b[8:] - } - return res, nil - } - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56 - s := f.toUint64Slice() - *s = append(*s, v) - return b[8:], nil -} - -func unmarshalFixedS64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 - *f.toInt64() = v - return b[8:], nil -} - -func unmarshalFixedS64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 - *f.toInt64Ptr() = &v - return b[8:], nil -} - -func unmarshalFixedS64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 - s := f.toInt64Slice() - *s = append(*s, v) - b = b[8:] - } - return res, nil - } - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := int64(b[0]) | int64(b[1])<<8 | int64(b[2])<<16 | int64(b[3])<<24 | int64(b[4])<<32 | int64(b[5])<<40 | int64(b[6])<<48 | int64(b[7])<<56 - s := f.toInt64Slice() - *s = append(*s, v) - return b[8:], nil -} - -func unmarshalFixed32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 - *f.toUint32() = v - return b[4:], nil -} - -func unmarshalFixed32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 - *f.toUint32Ptr() = &v - return b[4:], nil -} - -func unmarshalFixed32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 - s := f.toUint32Slice() - *s = append(*s, v) - b = b[4:] - } - return res, nil - } - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24 - s := f.toUint32Slice() - *s = append(*s, v) - return b[4:], nil -} - -func unmarshalFixedS32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 - *f.toInt32() = v - return b[4:], nil -} - -func unmarshalFixedS32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 - f.setInt32Ptr(v) - return b[4:], nil -} - -func unmarshalFixedS32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 - f.appendInt32Slice(v) - b = b[4:] - } - return res, nil - } - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := int32(b[0]) | int32(b[1])<<8 | int32(b[2])<<16 | int32(b[3])<<24 - f.appendInt32Slice(v) - return b[4:], nil -} - -func unmarshalBoolValue(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - // Note: any length varint is allowed, even though any sane - // encoder will use one byte. - // See https://github.com/golang/protobuf/issues/76 - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - // TODO: check if x>1? Tests seem to indicate no. - v := x != 0 - *f.toBool() = v - return b[n:], nil -} - -func unmarshalBoolPtr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - v := x != 0 - *f.toBoolPtr() = &v - return b[n:], nil -} - -func unmarshalBoolSlice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - x, n = decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - v := x != 0 - s := f.toBoolSlice() - *s = append(*s, v) - b = b[n:] - } - return res, nil - } - if w != WireVarint { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - v := x != 0 - s := f.toBoolSlice() - *s = append(*s, v) - return b[n:], nil -} - -func unmarshalFloat64Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) - *f.toFloat64() = v - return b[8:], nil -} - -func unmarshalFloat64Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) - *f.toFloat64Ptr() = &v - return b[8:], nil -} - -func unmarshalFloat64Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) - s := f.toFloat64Slice() - *s = append(*s, v) - b = b[8:] - } - return res, nil - } - if w != WireFixed64 { - return b, errInternalBadWireType - } - if len(b) < 8 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float64frombits(uint64(b[0]) | uint64(b[1])<<8 | uint64(b[2])<<16 | uint64(b[3])<<24 | uint64(b[4])<<32 | uint64(b[5])<<40 | uint64(b[6])<<48 | uint64(b[7])<<56) - s := f.toFloat64Slice() - *s = append(*s, v) - return b[8:], nil -} - -func unmarshalFloat32Value(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) - *f.toFloat32() = v - return b[4:], nil -} - -func unmarshalFloat32Ptr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) - *f.toFloat32Ptr() = &v - return b[4:], nil -} - -func unmarshalFloat32Slice(b []byte, f pointer, w int) ([]byte, error) { - if w == WireBytes { // packed - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - res := b[x:] - b = b[:x] - for len(b) > 0 { - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) - s := f.toFloat32Slice() - *s = append(*s, v) - b = b[4:] - } - return res, nil - } - if w != WireFixed32 { - return b, errInternalBadWireType - } - if len(b) < 4 { - return nil, io.ErrUnexpectedEOF - } - v := math.Float32frombits(uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24) - s := f.toFloat32Slice() - *s = append(*s, v) - return b[4:], nil -} - -func unmarshalStringValue(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - *f.toString() = v - return b[x:], nil -} - -func unmarshalStringPtr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - *f.toStringPtr() = &v - return b[x:], nil -} - -func unmarshalStringSlice(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - s := f.toStringSlice() - *s = append(*s, v) - return b[x:], nil -} - -func unmarshalUTF8StringValue(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - *f.toString() = v - if !utf8.ValidString(v) { - return b[x:], errInvalidUTF8 - } - return b[x:], nil -} - -func unmarshalUTF8StringPtr(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - *f.toStringPtr() = &v - if !utf8.ValidString(v) { - return b[x:], errInvalidUTF8 - } - return b[x:], nil -} - -func unmarshalUTF8StringSlice(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := string(b[:x]) - s := f.toStringSlice() - *s = append(*s, v) - if !utf8.ValidString(v) { - return b[x:], errInvalidUTF8 - } - return b[x:], nil -} - -var emptyBuf [0]byte - -func unmarshalBytesValue(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - // The use of append here is a trick which avoids the zeroing - // that would be required if we used a make/copy pair. - // We append to emptyBuf instead of nil because we want - // a non-nil result even when the length is 0. - v := append(emptyBuf[:], b[:x]...) - *f.toBytes() = v - return b[x:], nil -} - -func unmarshalBytesSlice(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := append(emptyBuf[:], b[:x]...) - s := f.toBytesSlice() - *s = append(*s, v) - return b[x:], nil -} - -func makeUnmarshalMessagePtr(sub *unmarshalInfo, name string) unmarshaler { - return func(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - // First read the message field to see if something is there. - // The semantics of multiple submessages are weird. Instead of - // the last one winning (as it is for all other fields), multiple - // submessages are merged. - v := f.getPointer() - if v.isNil() { - v = valToPointer(reflect.New(sub.typ)) - f.setPointer(v) - } - err := sub.unmarshal(v, b[:x]) - if err != nil { - if r, ok := err.(*RequiredNotSetError); ok { - r.field = name + "." + r.field - } else { - return nil, err - } - } - return b[x:], err - } -} - -func makeUnmarshalMessageSlicePtr(sub *unmarshalInfo, name string) unmarshaler { - return func(b []byte, f pointer, w int) ([]byte, error) { - if w != WireBytes { - return b, errInternalBadWireType - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - v := valToPointer(reflect.New(sub.typ)) - err := sub.unmarshal(v, b[:x]) - if err != nil { - if r, ok := err.(*RequiredNotSetError); ok { - r.field = name + "." + r.field - } else { - return nil, err - } - } - f.appendPointer(v) - return b[x:], err - } -} - -func makeUnmarshalGroupPtr(sub *unmarshalInfo, name string) unmarshaler { - return func(b []byte, f pointer, w int) ([]byte, error) { - if w != WireStartGroup { - return b, errInternalBadWireType - } - x, y := findEndGroup(b) - if x < 0 { - return nil, io.ErrUnexpectedEOF - } - v := f.getPointer() - if v.isNil() { - v = valToPointer(reflect.New(sub.typ)) - f.setPointer(v) - } - err := sub.unmarshal(v, b[:x]) - if err != nil { - if r, ok := err.(*RequiredNotSetError); ok { - r.field = name + "." + r.field - } else { - return nil, err - } - } - return b[y:], err - } -} - -func makeUnmarshalGroupSlicePtr(sub *unmarshalInfo, name string) unmarshaler { - return func(b []byte, f pointer, w int) ([]byte, error) { - if w != WireStartGroup { - return b, errInternalBadWireType - } - x, y := findEndGroup(b) - if x < 0 { - return nil, io.ErrUnexpectedEOF - } - v := valToPointer(reflect.New(sub.typ)) - err := sub.unmarshal(v, b[:x]) - if err != nil { - if r, ok := err.(*RequiredNotSetError); ok { - r.field = name + "." + r.field - } else { - return nil, err - } - } - f.appendPointer(v) - return b[y:], err - } -} - -func makeUnmarshalMap(f *reflect.StructField) unmarshaler { - t := f.Type - kt := t.Key() - vt := t.Elem() - unmarshalKey := typeUnmarshaler(kt, f.Tag.Get("protobuf_key")) - unmarshalVal := typeUnmarshaler(vt, f.Tag.Get("protobuf_val")) - return func(b []byte, f pointer, w int) ([]byte, error) { - // The map entry is a submessage. Figure out how big it is. - if w != WireBytes { - return nil, fmt.Errorf("proto: bad wiretype for map field: got %d want %d", w, WireBytes) - } - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - b = b[n:] - if x > uint64(len(b)) { - return nil, io.ErrUnexpectedEOF - } - r := b[x:] // unused data to return - b = b[:x] // data for map entry - - // Note: we could use #keys * #values ~= 200 functions - // to do map decoding without reflection. Probably not worth it. - // Maps will be somewhat slow. Oh well. - - // Read key and value from data. - var nerr nonFatal - k := reflect.New(kt) - v := reflect.New(vt) - for len(b) > 0 { - x, n := decodeVarint(b) - if n == 0 { - return nil, io.ErrUnexpectedEOF - } - wire := int(x) & 7 - b = b[n:] - - var err error - switch x >> 3 { - case 1: - b, err = unmarshalKey(b, valToPointer(k), wire) - case 2: - b, err = unmarshalVal(b, valToPointer(v), wire) - default: - err = errInternalBadWireType // skip unknown tag - } - - if nerr.Merge(err) { - continue - } - if err != errInternalBadWireType { - return nil, err - } - - // Skip past unknown fields. - b, err = skipField(b, wire) - if err != nil { - return nil, err - } - } - - // Get map, allocate if needed. - m := f.asPointerTo(t).Elem() // an addressable map[K]T - if m.IsNil() { - m.Set(reflect.MakeMap(t)) - } - - // Insert into map. - m.SetMapIndex(k.Elem(), v.Elem()) - - return r, nerr.E - } -} - -// makeUnmarshalOneof makes an unmarshaler for oneof fields. -// for: -// message Msg { -// oneof F { -// int64 X = 1; -// float64 Y = 2; -// } -// } -// typ is the type of the concrete entry for a oneof case (e.g. Msg_X). -// ityp is the interface type of the oneof field (e.g. isMsg_F). -// unmarshal is the unmarshaler for the base type of the oneof case (e.g. int64). -// Note that this function will be called once for each case in the oneof. -func makeUnmarshalOneof(typ, ityp reflect.Type, unmarshal unmarshaler) unmarshaler { - sf := typ.Field(0) - field0 := toField(&sf) - return func(b []byte, f pointer, w int) ([]byte, error) { - // Allocate holder for value. - v := reflect.New(typ) - - // Unmarshal data into holder. - // We unmarshal into the first field of the holder object. - var err error - var nerr nonFatal - b, err = unmarshal(b, valToPointer(v).offset(field0), w) - if !nerr.Merge(err) { - return nil, err - } - - // Write pointer to holder into target field. - f.asPointerTo(ityp).Elem().Set(v) - - return b, nerr.E - } -} - -// Error used by decode internally. -var errInternalBadWireType = errors.New("proto: internal error: bad wiretype") - -// skipField skips past a field of type wire and returns the remaining bytes. -func skipField(b []byte, wire int) ([]byte, error) { - switch wire { - case WireVarint: - _, k := decodeVarint(b) - if k == 0 { - return b, io.ErrUnexpectedEOF - } - b = b[k:] - case WireFixed32: - if len(b) < 4 { - return b, io.ErrUnexpectedEOF - } - b = b[4:] - case WireFixed64: - if len(b) < 8 { - return b, io.ErrUnexpectedEOF - } - b = b[8:] - case WireBytes: - m, k := decodeVarint(b) - if k == 0 || uint64(len(b)-k) < m { - return b, io.ErrUnexpectedEOF - } - b = b[uint64(k)+m:] - case WireStartGroup: - _, i := findEndGroup(b) - if i == -1 { - return b, io.ErrUnexpectedEOF - } - b = b[i:] - default: - return b, fmt.Errorf("proto: can't skip unknown wire type %d", wire) - } - return b, nil -} - -// findEndGroup finds the index of the next EndGroup tag. -// Groups may be nested, so the "next" EndGroup tag is the first -// unpaired EndGroup. -// findEndGroup returns the indexes of the start and end of the EndGroup tag. -// Returns (-1,-1) if it can't find one. -func findEndGroup(b []byte) (int, int) { - depth := 1 - i := 0 - for { - x, n := decodeVarint(b[i:]) - if n == 0 { - return -1, -1 - } - j := i - i += n - switch x & 7 { - case WireVarint: - _, k := decodeVarint(b[i:]) - if k == 0 { - return -1, -1 - } - i += k - case WireFixed32: - if len(b)-4 < i { - return -1, -1 - } - i += 4 - case WireFixed64: - if len(b)-8 < i { - return -1, -1 - } - i += 8 - case WireBytes: - m, k := decodeVarint(b[i:]) - if k == 0 { - return -1, -1 - } - i += k - if uint64(len(b)-i) < m { - return -1, -1 - } - i += int(m) - case WireStartGroup: - depth++ - case WireEndGroup: - depth-- - if depth == 0 { - return j, i - } - default: - return -1, -1 - } - } -} - -// encodeVarint appends a varint-encoded integer to b and returns the result. -func encodeVarint(b []byte, x uint64) []byte { - for x >= 1<<7 { - b = append(b, byte(x&0x7f|0x80)) - x >>= 7 - } - return append(b, byte(x)) -} - -// decodeVarint reads a varint-encoded integer from b. -// Returns the decoded integer and the number of bytes read. -// If there is an error, it returns 0,0. -func decodeVarint(b []byte) (uint64, int) { - var x, y uint64 - if len(b) <= 0 { - goto bad - } - x = uint64(b[0]) - if x < 0x80 { - return x, 1 - } - x -= 0x80 - - if len(b) <= 1 { - goto bad - } - y = uint64(b[1]) - x += y << 7 - if y < 0x80 { - return x, 2 - } - x -= 0x80 << 7 - - if len(b) <= 2 { - goto bad - } - y = uint64(b[2]) - x += y << 14 - if y < 0x80 { - return x, 3 - } - x -= 0x80 << 14 - - if len(b) <= 3 { - goto bad - } - y = uint64(b[3]) - x += y << 21 - if y < 0x80 { - return x, 4 - } - x -= 0x80 << 21 - - if len(b) <= 4 { - goto bad - } - y = uint64(b[4]) - x += y << 28 - if y < 0x80 { - return x, 5 - } - x -= 0x80 << 28 - - if len(b) <= 5 { - goto bad - } - y = uint64(b[5]) - x += y << 35 - if y < 0x80 { - return x, 6 - } - x -= 0x80 << 35 - - if len(b) <= 6 { - goto bad - } - y = uint64(b[6]) - x += y << 42 - if y < 0x80 { - return x, 7 - } - x -= 0x80 << 42 - - if len(b) <= 7 { - goto bad - } - y = uint64(b[7]) - x += y << 49 - if y < 0x80 { - return x, 8 - } - x -= 0x80 << 49 - - if len(b) <= 8 { - goto bad - } - y = uint64(b[8]) - x += y << 56 - if y < 0x80 { - return x, 9 - } - x -= 0x80 << 56 - - if len(b) <= 9 { - goto bad - } - y = uint64(b[9]) - x += y << 63 - if y < 2 { - return x, 10 - } - -bad: - return 0, 0 -} |