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path: root/vendor/github.com/golang/protobuf/proto/encode.go
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-rw-r--r--vendor/github.com/golang/protobuf/proto/encode.go1355
1 files changed, 1355 insertions, 0 deletions
diff --git a/vendor/github.com/golang/protobuf/proto/encode.go b/vendor/github.com/golang/protobuf/proto/encode.go
new file mode 100644
index 000000000..68b9b30cf
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/encode.go
@@ -0,0 +1,1355 @@
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 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
+
+/*
+ * Routines for encoding data into the wire format for protocol buffers.
+ */
+
+import (
+ "errors"
+ "fmt"
+ "reflect"
+ "sort"
+)
+
+// RequiredNotSetError is the error returned if Marshal is called with
+// a protocol buffer struct whose required fields have not
+// all been initialized. It is also the error returned if Unmarshal is
+// called with an encoded protocol buffer that does not include all the
+// required fields.
+//
+// When printed, RequiredNotSetError reports the first unset required field in a
+// message. If the field cannot be precisely determined, it is reported as
+// "{Unknown}".
+type RequiredNotSetError struct {
+ field string
+}
+
+func (e *RequiredNotSetError) Error() string {
+ return fmt.Sprintf("proto: required field %q not set", e.field)
+}
+
+var (
+ // errRepeatedHasNil is the error returned if Marshal is called with
+ // a struct with a repeated field containing a nil element.
+ errRepeatedHasNil = errors.New("proto: repeated field has nil element")
+
+ // errOneofHasNil is the error returned if Marshal is called with
+ // a struct with a oneof field containing a nil element.
+ errOneofHasNil = errors.New("proto: oneof field has nil value")
+
+ // ErrNil is the error returned if Marshal is called with nil.
+ ErrNil = errors.New("proto: Marshal called with nil")
+
+ // ErrTooLarge is the error returned if Marshal is called with a
+ // message that encodes to >2GB.
+ ErrTooLarge = errors.New("proto: message encodes to over 2 GB")
+)
+
+// The fundamental encoders that put bytes on the wire.
+// Those that take integer types all accept uint64 and are
+// therefore of type valueEncoder.
+
+const maxVarintBytes = 10 // maximum length of a varint
+
+// maxMarshalSize is the largest allowed size of an encoded protobuf,
+// since C++ and Java use signed int32s for the size.
+const maxMarshalSize = 1<<31 - 1
+
+// EncodeVarint returns the varint encoding of x.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+// Not used by the package itself, but helpful to clients
+// wishing to use the same encoding.
+func EncodeVarint(x uint64) []byte {
+ var buf [maxVarintBytes]byte
+ var n int
+ for n = 0; x > 127; n++ {
+ buf[n] = 0x80 | uint8(x&0x7F)
+ x >>= 7
+ }
+ buf[n] = uint8(x)
+ n++
+ return buf[0:n]
+}
+
+// EncodeVarint writes a varint-encoded integer to the Buffer.
+// This is the format for the
+// int32, int64, uint32, uint64, bool, and enum
+// protocol buffer types.
+func (p *Buffer) EncodeVarint(x uint64) error {
+ for x >= 1<<7 {
+ p.buf = append(p.buf, uint8(x&0x7f|0x80))
+ x >>= 7
+ }
+ p.buf = append(p.buf, uint8(x))
+ return nil
+}
+
+// SizeVarint returns the varint encoding size of an integer.
+func SizeVarint(x uint64) int {
+ return sizeVarint(x)
+}
+
+func sizeVarint(x uint64) (n int) {
+ for {
+ n++
+ x >>= 7
+ if x == 0 {
+ break
+ }
+ }
+ return n
+}
+
+// EncodeFixed64 writes a 64-bit integer to the Buffer.
+// This is the format for the
+// fixed64, sfixed64, and double protocol buffer types.
+func (p *Buffer) EncodeFixed64(x uint64) error {
+ p.buf = append(p.buf,
+ uint8(x),
+ uint8(x>>8),
+ uint8(x>>16),
+ uint8(x>>24),
+ uint8(x>>32),
+ uint8(x>>40),
+ uint8(x>>48),
+ uint8(x>>56))
+ return nil
+}
+
+func sizeFixed64(x uint64) int {
+ return 8
+}
+
+// EncodeFixed32 writes a 32-bit integer to the Buffer.
+// This is the format for the
+// fixed32, sfixed32, and float protocol buffer types.
+func (p *Buffer) EncodeFixed32(x uint64) error {
+ p.buf = append(p.buf,
+ uint8(x),
+ uint8(x>>8),
+ uint8(x>>16),
+ uint8(x>>24))
+ return nil
+}
+
+func sizeFixed32(x uint64) int {
+ return 4
+}
+
+// EncodeZigzag64 writes a zigzag-encoded 64-bit integer
+// to the Buffer.
+// This is the format used for the sint64 protocol buffer type.
+func (p *Buffer) EncodeZigzag64(x uint64) error {
+ // use signed number to get arithmetic right shift.
+ return p.EncodeVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+
+func sizeZigzag64(x uint64) int {
+ return sizeVarint(uint64((x << 1) ^ uint64((int64(x) >> 63))))
+}
+
+// EncodeZigzag32 writes a zigzag-encoded 32-bit integer
+// to the Buffer.
+// This is the format used for the sint32 protocol buffer type.
+func (p *Buffer) EncodeZigzag32(x uint64) error {
+ // use signed number to get arithmetic right shift.
+ return p.EncodeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
+}
+
+func sizeZigzag32(x uint64) int {
+ return sizeVarint(uint64((uint32(x) << 1) ^ uint32((int32(x) >> 31))))
+}
+
+// EncodeRawBytes writes a count-delimited byte buffer to the Buffer.
+// This is the format used for the bytes protocol buffer
+// type and for embedded messages.
+func (p *Buffer) EncodeRawBytes(b []byte) error {
+ p.EncodeVarint(uint64(len(b)))
+ p.buf = append(p.buf, b...)
+ return nil
+}
+
+func sizeRawBytes(b []byte) int {
+ return sizeVarint(uint64(len(b))) +
+ len(b)
+}
+
+// EncodeStringBytes writes an encoded string to the Buffer.
+// This is the format used for the proto2 string type.
+func (p *Buffer) EncodeStringBytes(s string) error {
+ p.EncodeVarint(uint64(len(s)))
+ p.buf = append(p.buf, s...)
+ return nil
+}
+
+func sizeStringBytes(s string) int {
+ return sizeVarint(uint64(len(s))) +
+ len(s)
+}
+
+// Marshaler is the interface representing objects that can marshal themselves.
+type Marshaler interface {
+ Marshal() ([]byte, error)
+}
+
+// Marshal takes the protocol buffer
+// and encodes it into the wire format, returning the data.
+func Marshal(pb Message) ([]byte, error) {
+ // Can the object marshal itself?
+ if m, ok := pb.(Marshaler); ok {
+ return m.Marshal()
+ }
+ p := NewBuffer(nil)
+ err := p.Marshal(pb)
+ if p.buf == nil && err == nil {
+ // Return a non-nil slice on success.
+ return []byte{}, nil
+ }
+ return p.buf, err
+}
+
+// EncodeMessage writes the protocol buffer to the Buffer,
+// prefixed by a varint-encoded length.
+func (p *Buffer) EncodeMessage(pb Message) error {
+ t, base, err := getbase(pb)
+ if structPointer_IsNil(base) {
+ return ErrNil
+ }
+ if err == nil {
+ var state errorState
+ err = p.enc_len_struct(GetProperties(t.Elem()), base, &state)
+ }
+ return err
+}
+
+// Marshal takes the protocol buffer
+// and encodes it into the wire format, writing the result to the
+// Buffer.
+func (p *Buffer) Marshal(pb Message) error {
+ // Can the object marshal itself?
+ if m, ok := pb.(Marshaler); ok {
+ data, err := m.Marshal()
+ p.buf = append(p.buf, data...)
+ return err
+ }
+
+ t, base, err := getbase(pb)
+ if structPointer_IsNil(base) {
+ return ErrNil
+ }
+ if err == nil {
+ err = p.enc_struct(GetProperties(t.Elem()), base)
+ }
+
+ if collectStats {
+ (stats).Encode++ // Parens are to work around a goimports bug.
+ }
+
+ if len(p.buf) > maxMarshalSize {
+ return ErrTooLarge
+ }
+ return err
+}
+
+// Size returns the encoded size of a protocol buffer.
+func Size(pb Message) (n int) {
+ // Can the object marshal itself? If so, Size is slow.
+ // TODO: add Size to Marshaler, or add a Sizer interface.
+ if m, ok := pb.(Marshaler); ok {
+ b, _ := m.Marshal()
+ return len(b)
+ }
+
+ t, base, err := getbase(pb)
+ if structPointer_IsNil(base) {
+ return 0
+ }
+ if err == nil {
+ n = size_struct(GetProperties(t.Elem()), base)
+ }
+
+ if collectStats {
+ (stats).Size++ // Parens are to work around a goimports bug.
+ }
+
+ return
+}
+
+// Individual type encoders.
+
+// Encode a bool.
+func (o *Buffer) enc_bool(p *Properties, base structPointer) error {
+ v := *structPointer_Bool(base, p.field)
+ if v == nil {
+ return ErrNil
+ }
+ x := 0
+ if *v {
+ x = 1
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, uint64(x))
+ return nil
+}
+
+func (o *Buffer) enc_proto3_bool(p *Properties, base structPointer) error {
+ v := *structPointer_BoolVal(base, p.field)
+ if !v {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, 1)
+ return nil
+}
+
+func size_bool(p *Properties, base structPointer) int {
+ v := *structPointer_Bool(base, p.field)
+ if v == nil {
+ return 0
+ }
+ return len(p.tagcode) + 1 // each bool takes exactly one byte
+}
+
+func size_proto3_bool(p *Properties, base structPointer) int {
+ v := *structPointer_BoolVal(base, p.field)
+ if !v && !p.oneof {
+ return 0
+ }
+ return len(p.tagcode) + 1 // each bool takes exactly one byte
+}
+
+// Encode an int32.
+func (o *Buffer) enc_int32(p *Properties, base structPointer) error {
+ v := structPointer_Word32(base, p.field)
+ if word32_IsNil(v) {
+ return ErrNil
+ }
+ x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, uint64(x))
+ return nil
+}
+
+func (o *Buffer) enc_proto3_int32(p *Properties, base structPointer) error {
+ v := structPointer_Word32Val(base, p.field)
+ x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
+ if x == 0 {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, uint64(x))
+ return nil
+}
+
+func size_int32(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word32(base, p.field)
+ if word32_IsNil(v) {
+ return 0
+ }
+ x := int32(word32_Get(v)) // permit sign extension to use full 64-bit range
+ n += len(p.tagcode)
+ n += p.valSize(uint64(x))
+ return
+}
+
+func size_proto3_int32(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word32Val(base, p.field)
+ x := int32(word32Val_Get(v)) // permit sign extension to use full 64-bit range
+ if x == 0 && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += p.valSize(uint64(x))
+ return
+}
+
+// Encode a uint32.
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_uint32(p *Properties, base structPointer) error {
+ v := structPointer_Word32(base, p.field)
+ if word32_IsNil(v) {
+ return ErrNil
+ }
+ x := word32_Get(v)
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, uint64(x))
+ return nil
+}
+
+func (o *Buffer) enc_proto3_uint32(p *Properties, base structPointer) error {
+ v := structPointer_Word32Val(base, p.field)
+ x := word32Val_Get(v)
+ if x == 0 {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, uint64(x))
+ return nil
+}
+
+func size_uint32(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word32(base, p.field)
+ if word32_IsNil(v) {
+ return 0
+ }
+ x := word32_Get(v)
+ n += len(p.tagcode)
+ n += p.valSize(uint64(x))
+ return
+}
+
+func size_proto3_uint32(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word32Val(base, p.field)
+ x := word32Val_Get(v)
+ if x == 0 && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += p.valSize(uint64(x))
+ return
+}
+
+// Encode an int64.
+func (o *Buffer) enc_int64(p *Properties, base structPointer) error {
+ v := structPointer_Word64(base, p.field)
+ if word64_IsNil(v) {
+ return ErrNil
+ }
+ x := word64_Get(v)
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, x)
+ return nil
+}
+
+func (o *Buffer) enc_proto3_int64(p *Properties, base structPointer) error {
+ v := structPointer_Word64Val(base, p.field)
+ x := word64Val_Get(v)
+ if x == 0 {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, x)
+ return nil
+}
+
+func size_int64(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word64(base, p.field)
+ if word64_IsNil(v) {
+ return 0
+ }
+ x := word64_Get(v)
+ n += len(p.tagcode)
+ n += p.valSize(x)
+ return
+}
+
+func size_proto3_int64(p *Properties, base structPointer) (n int) {
+ v := structPointer_Word64Val(base, p.field)
+ x := word64Val_Get(v)
+ if x == 0 && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += p.valSize(x)
+ return
+}
+
+// Encode a string.
+func (o *Buffer) enc_string(p *Properties, base structPointer) error {
+ v := *structPointer_String(base, p.field)
+ if v == nil {
+ return ErrNil
+ }
+ x := *v
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeStringBytes(x)
+ return nil
+}
+
+func (o *Buffer) enc_proto3_string(p *Properties, base structPointer) error {
+ v := *structPointer_StringVal(base, p.field)
+ if v == "" {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeStringBytes(v)
+ return nil
+}
+
+func size_string(p *Properties, base structPointer) (n int) {
+ v := *structPointer_String(base, p.field)
+ if v == nil {
+ return 0
+ }
+ x := *v
+ n += len(p.tagcode)
+ n += sizeStringBytes(x)
+ return
+}
+
+func size_proto3_string(p *Properties, base structPointer) (n int) {
+ v := *structPointer_StringVal(base, p.field)
+ if v == "" && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += sizeStringBytes(v)
+ return
+}
+
+// All protocol buffer fields are nillable, but be careful.
+func isNil(v reflect.Value) bool {
+ switch v.Kind() {
+ case reflect.Interface, reflect.Map, reflect.Ptr, reflect.Slice:
+ return v.IsNil()
+ }
+ return false
+}
+
+// Encode a message struct.
+func (o *Buffer) enc_struct_message(p *Properties, base structPointer) error {
+ var state errorState
+ structp := structPointer_GetStructPointer(base, p.field)
+ if structPointer_IsNil(structp) {
+ return ErrNil
+ }
+
+ // Can the object marshal itself?
+ if p.isMarshaler {
+ m := structPointer_Interface(structp, p.stype).(Marshaler)
+ data, err := m.Marshal()
+ if err != nil && !state.shouldContinue(err, nil) {
+ return err
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeRawBytes(data)
+ return state.err
+ }
+
+ o.buf = append(o.buf, p.tagcode...)
+ return o.enc_len_struct(p.sprop, structp, &state)
+}
+
+func size_struct_message(p *Properties, base structPointer) int {
+ structp := structPointer_GetStructPointer(base, p.field)
+ if structPointer_IsNil(structp) {
+ return 0
+ }
+
+ // Can the object marshal itself?
+ if p.isMarshaler {
+ m := structPointer_Interface(structp, p.stype).(Marshaler)
+ data, _ := m.Marshal()
+ n0 := len(p.tagcode)
+ n1 := sizeRawBytes(data)
+ return n0 + n1
+ }
+
+ n0 := len(p.tagcode)
+ n1 := size_struct(p.sprop, structp)
+ n2 := sizeVarint(uint64(n1)) // size of encoded length
+ return n0 + n1 + n2
+}
+
+// Encode a group struct.
+func (o *Buffer) enc_struct_group(p *Properties, base structPointer) error {
+ var state errorState
+ b := structPointer_GetStructPointer(base, p.field)
+ if structPointer_IsNil(b) {
+ return ErrNil
+ }
+
+ o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
+ err := o.enc_struct(p.sprop, b)
+ if err != nil && !state.shouldContinue(err, nil) {
+ return err
+ }
+ o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
+ return state.err
+}
+
+func size_struct_group(p *Properties, base structPointer) (n int) {
+ b := structPointer_GetStructPointer(base, p.field)
+ if structPointer_IsNil(b) {
+ return 0
+ }
+
+ n += sizeVarint(uint64((p.Tag << 3) | WireStartGroup))
+ n += size_struct(p.sprop, b)
+ n += sizeVarint(uint64((p.Tag << 3) | WireEndGroup))
+ return
+}
+
+// Encode a slice of bools ([]bool).
+func (o *Buffer) enc_slice_bool(p *Properties, base structPointer) error {
+ s := *structPointer_BoolSlice(base, p.field)
+ l := len(s)
+ if l == 0 {
+ return ErrNil
+ }
+ for _, x := range s {
+ o.buf = append(o.buf, p.tagcode...)
+ v := uint64(0)
+ if x {
+ v = 1
+ }
+ p.valEnc(o, v)
+ }
+ return nil
+}
+
+func size_slice_bool(p *Properties, base structPointer) int {
+ s := *structPointer_BoolSlice(base, p.field)
+ l := len(s)
+ if l == 0 {
+ return 0
+ }
+ return l * (len(p.tagcode) + 1) // each bool takes exactly one byte
+}
+
+// Encode a slice of bools ([]bool) in packed format.
+func (o *Buffer) enc_slice_packed_bool(p *Properties, base structPointer) error {
+ s := *structPointer_BoolSlice(base, p.field)
+ l := len(s)
+ if l == 0 {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeVarint(uint64(l)) // each bool takes exactly one byte
+ for _, x := range s {
+ v := uint64(0)
+ if x {
+ v = 1
+ }
+ p.valEnc(o, v)
+ }
+ return nil
+}
+
+func size_slice_packed_bool(p *Properties, base structPointer) (n int) {
+ s := *structPointer_BoolSlice(base, p.field)
+ l := len(s)
+ if l == 0 {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += sizeVarint(uint64(l))
+ n += l // each bool takes exactly one byte
+ return
+}
+
+// Encode a slice of bytes ([]byte).
+func (o *Buffer) enc_slice_byte(p *Properties, base structPointer) error {
+ s := *structPointer_Bytes(base, p.field)
+ if s == nil {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeRawBytes(s)
+ return nil
+}
+
+func (o *Buffer) enc_proto3_slice_byte(p *Properties, base structPointer) error {
+ s := *structPointer_Bytes(base, p.field)
+ if len(s) == 0 {
+ return ErrNil
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeRawBytes(s)
+ return nil
+}
+
+func size_slice_byte(p *Properties, base structPointer) (n int) {
+ s := *structPointer_Bytes(base, p.field)
+ if s == nil && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += sizeRawBytes(s)
+ return
+}
+
+func size_proto3_slice_byte(p *Properties, base structPointer) (n int) {
+ s := *structPointer_Bytes(base, p.field)
+ if len(s) == 0 && !p.oneof {
+ return 0
+ }
+ n += len(p.tagcode)
+ n += sizeRawBytes(s)
+ return
+}
+
+// Encode a slice of int32s ([]int32).
+func (o *Buffer) enc_slice_int32(p *Properties, base structPointer) error {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ for i := 0; i < l; i++ {
+ o.buf = append(o.buf, p.tagcode...)
+ x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+ p.valEnc(o, uint64(x))
+ }
+ return nil
+}
+
+func size_slice_int32(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ for i := 0; i < l; i++ {
+ n += len(p.tagcode)
+ x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+ n += p.valSize(uint64(x))
+ }
+ return
+}
+
+// Encode a slice of int32s ([]int32) in packed format.
+func (o *Buffer) enc_slice_packed_int32(p *Properties, base structPointer) error {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ // TODO: Reuse a Buffer.
+ buf := NewBuffer(nil)
+ for i := 0; i < l; i++ {
+ x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+ p.valEnc(buf, uint64(x))
+ }
+
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeVarint(uint64(len(buf.buf)))
+ o.buf = append(o.buf, buf.buf...)
+ return nil
+}
+
+func size_slice_packed_int32(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ var bufSize int
+ for i := 0; i < l; i++ {
+ x := int32(s.Index(i)) // permit sign extension to use full 64-bit range
+ bufSize += p.valSize(uint64(x))
+ }
+
+ n += len(p.tagcode)
+ n += sizeVarint(uint64(bufSize))
+ n += bufSize
+ return
+}
+
+// Encode a slice of uint32s ([]uint32).
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_slice_uint32(p *Properties, base structPointer) error {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ for i := 0; i < l; i++ {
+ o.buf = append(o.buf, p.tagcode...)
+ x := s.Index(i)
+ p.valEnc(o, uint64(x))
+ }
+ return nil
+}
+
+func size_slice_uint32(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ for i := 0; i < l; i++ {
+ n += len(p.tagcode)
+ x := s.Index(i)
+ n += p.valSize(uint64(x))
+ }
+ return
+}
+
+// Encode a slice of uint32s ([]uint32) in packed format.
+// Exactly the same as int32, except for no sign extension.
+func (o *Buffer) enc_slice_packed_uint32(p *Properties, base structPointer) error {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ // TODO: Reuse a Buffer.
+ buf := NewBuffer(nil)
+ for i := 0; i < l; i++ {
+ p.valEnc(buf, uint64(s.Index(i)))
+ }
+
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeVarint(uint64(len(buf.buf)))
+ o.buf = append(o.buf, buf.buf...)
+ return nil
+}
+
+func size_slice_packed_uint32(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word32Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ var bufSize int
+ for i := 0; i < l; i++ {
+ bufSize += p.valSize(uint64(s.Index(i)))
+ }
+
+ n += len(p.tagcode)
+ n += sizeVarint(uint64(bufSize))
+ n += bufSize
+ return
+}
+
+// Encode a slice of int64s ([]int64).
+func (o *Buffer) enc_slice_int64(p *Properties, base structPointer) error {
+ s := structPointer_Word64Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ for i := 0; i < l; i++ {
+ o.buf = append(o.buf, p.tagcode...)
+ p.valEnc(o, s.Index(i))
+ }
+ return nil
+}
+
+func size_slice_int64(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word64Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ for i := 0; i < l; i++ {
+ n += len(p.tagcode)
+ n += p.valSize(s.Index(i))
+ }
+ return
+}
+
+// Encode a slice of int64s ([]int64) in packed format.
+func (o *Buffer) enc_slice_packed_int64(p *Properties, base structPointer) error {
+ s := structPointer_Word64Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return ErrNil
+ }
+ // TODO: Reuse a Buffer.
+ buf := NewBuffer(nil)
+ for i := 0; i < l; i++ {
+ p.valEnc(buf, s.Index(i))
+ }
+
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeVarint(uint64(len(buf.buf)))
+ o.buf = append(o.buf, buf.buf...)
+ return nil
+}
+
+func size_slice_packed_int64(p *Properties, base structPointer) (n int) {
+ s := structPointer_Word64Slice(base, p.field)
+ l := s.Len()
+ if l == 0 {
+ return 0
+ }
+ var bufSize int
+ for i := 0; i < l; i++ {
+ bufSize += p.valSize(s.Index(i))
+ }
+
+ n += len(p.tagcode)
+ n += sizeVarint(uint64(bufSize))
+ n += bufSize
+ return
+}
+
+// Encode a slice of slice of bytes ([][]byte).
+func (o *Buffer) enc_slice_slice_byte(p *Properties, base structPointer) error {
+ ss := *structPointer_BytesSlice(base, p.field)
+ l := len(ss)
+ if l == 0 {
+ return ErrNil
+ }
+ for i := 0; i < l; i++ {
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeRawBytes(ss[i])
+ }
+ return nil
+}
+
+func size_slice_slice_byte(p *Properties, base structPointer) (n int) {
+ ss := *structPointer_BytesSlice(base, p.field)
+ l := len(ss)
+ if l == 0 {
+ return 0
+ }
+ n += l * len(p.tagcode)
+ for i := 0; i < l; i++ {
+ n += sizeRawBytes(ss[i])
+ }
+ return
+}
+
+// Encode a slice of strings ([]string).
+func (o *Buffer) enc_slice_string(p *Properties, base structPointer) error {
+ ss := *structPointer_StringSlice(base, p.field)
+ l := len(ss)
+ for i := 0; i < l; i++ {
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeStringBytes(ss[i])
+ }
+ return nil
+}
+
+func size_slice_string(p *Properties, base structPointer) (n int) {
+ ss := *structPointer_StringSlice(base, p.field)
+ l := len(ss)
+ n += l * len(p.tagcode)
+ for i := 0; i < l; i++ {
+ n += sizeStringBytes(ss[i])
+ }
+ return
+}
+
+// Encode a slice of message structs ([]*struct).
+func (o *Buffer) enc_slice_struct_message(p *Properties, base structPointer) error {
+ var state errorState
+ s := structPointer_StructPointerSlice(base, p.field)
+ l := s.Len()
+
+ for i := 0; i < l; i++ {
+ structp := s.Index(i)
+ if structPointer_IsNil(structp) {
+ return errRepeatedHasNil
+ }
+
+ // Can the object marshal itself?
+ if p.isMarshaler {
+ m := structPointer_Interface(structp, p.stype).(Marshaler)
+ data, err := m.Marshal()
+ if err != nil && !state.shouldContinue(err, nil) {
+ return err
+ }
+ o.buf = append(o.buf, p.tagcode...)
+ o.EncodeRawBytes(data)
+ continue
+ }
+
+ o.buf = append(o.buf, p.tagcode...)
+ err := o.enc_len_struct(p.sprop, structp, &state)
+ if err != nil && !state.shouldContinue(err, nil) {
+ if err == ErrNil {
+ return errRepeatedHasNil
+ }
+ return err
+ }
+ }
+ return state.err
+}
+
+func size_slice_struct_message(p *Properties, base structPointer) (n int) {
+ s := structPointer_StructPointerSlice(base, p.field)
+ l := s.Len()
+ n += l * len(p.tagcode)
+ for i := 0; i < l; i++ {
+ structp := s.Index(i)
+ if structPointer_IsNil(structp) {
+ return // return the size up to this point
+ }
+
+ // Can the object marshal itself?
+ if p.isMarshaler {
+ m := structPointer_Interface(structp, p.stype).(Marshaler)
+ data, _ := m.Marshal()
+ n += sizeRawBytes(data)
+ continue
+ }
+
+ n0 := size_struct(p.sprop, structp)
+ n1 := sizeVarint(uint64(n0)) // size of encoded length
+ n += n0 + n1
+ }
+ return
+}
+
+// Encode a slice of group structs ([]*struct).
+func (o *Buffer) enc_slice_struct_group(p *Properties, base structPointer) error {
+ var state errorState
+ s := structPointer_StructPointerSlice(base, p.field)
+ l := s.Len()
+
+ for i := 0; i < l; i++ {
+ b := s.Index(i)
+ if structPointer_IsNil(b) {
+ return errRepeatedHasNil
+ }
+
+ o.EncodeVarint(uint64((p.Tag << 3) | WireStartGroup))
+
+ err := o.enc_struct(p.sprop, b)
+
+ if err != nil && !state.shouldContinue(err, nil) {
+ if err == ErrNil {
+ return errRepeatedHasNil
+ }
+ return err
+ }
+
+ o.EncodeVarint(uint64((p.Tag << 3) | WireEndGroup))
+ }
+ return state.err
+}
+
+func size_slice_struct_group(p *Properties, base structPointer) (n int) {
+ s := structPointer_StructPointerSlice(base, p.field)
+ l := s.Len()
+
+ n += l * sizeVarint(uint64((p.Tag<<3)|WireStartGroup))
+ n += l * sizeVarint(uint64((p.Tag<<3)|WireEndGroup))
+ for i := 0; i < l; i++ {
+ b := s.Index(i)
+ if structPointer_IsNil(b) {
+ return // return size up to this point
+ }
+
+ n += size_struct(p.sprop, b)
+ }
+ return
+}
+
+// Encode an extension map.
+func (o *Buffer) enc_map(p *Properties, base structPointer) error {
+ exts := structPointer_ExtMap(base, p.field)
+ if err := encodeExtensionsMap(*exts); err != nil {
+ return err
+ }
+
+ return o.enc_map_body(*exts)
+}
+
+func (o *Buffer) enc_exts(p *Properties, base structPointer) error {
+ exts := structPointer_Extensions(base, p.field)
+ if err := encodeExtensions(exts); err != nil {
+ return err
+ }
+ v, _ := exts.extensionsRead()
+
+ return o.enc_map_body(v)
+}
+
+func (o *Buffer) enc_map_body(v map[int32]Extension) error {
+ // Fast-path for common cases: zero or one extensions.
+ if len(v) <= 1 {
+ for _, e := range v {
+ o.buf = append(o.buf, e.enc...)
+ }
+ return nil
+ }
+
+ // Sort keys to provide a deterministic encoding.
+ keys := make([]int, 0, len(v))
+ for k := range v {
+ keys = append(keys, int(k))
+ }
+ sort.Ints(keys)
+
+ for _, k := range keys {
+ o.buf = append(o.buf, v[int32(k)].enc...)
+ }
+ return nil
+}
+
+func size_map(p *Properties, base structPointer) int {
+ v := structPointer_ExtMap(base, p.field)
+ return extensionsMapSize(*v)
+}
+
+func size_exts(p *Properties, base structPointer) int {
+ v := structPointer_Extensions(base, p.field)
+ return extensionsSize(v)
+}
+
+// Encode a map field.
+func (o *Buffer) enc_new_map(p *Properties, base structPointer) error {
+ var state errorState // XXX: or do we need to plumb this through?
+
+ /*
+ A map defined as
+ map<key_type, value_type> map_field = N;
+ is encoded in the same way as
+ message MapFieldEntry {
+ key_type key = 1;
+ value_type value = 2;
+ }
+ repeated MapFieldEntry map_field = N;
+ */
+
+ v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
+ if v.Len() == 0 {
+ return nil
+ }
+
+ keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
+
+ enc := func() error {
+ if err := p.mkeyprop.enc(o, p.mkeyprop, keybase); err != nil {
+ return err
+ }
+ if err := p.mvalprop.enc(o, p.mvalprop, valbase); err != nil && err != ErrNil {
+ return err
+ }
+ return nil
+ }
+
+ // Don't sort map keys. It is not required by the spec, and C++ doesn't do it.
+ for _, key := range v.MapKeys() {
+ val := v.MapIndex(key)
+
+ keycopy.Set(key)
+ valcopy.Set(val)
+
+ o.buf = append(o.buf, p.tagcode...)
+ if err := o.enc_len_thing(enc, &state); err != nil {
+ return err
+ }
+ }
+ return nil
+}
+
+func size_new_map(p *Properties, base structPointer) int {
+ v := structPointer_NewAt(base, p.field, p.mtype).Elem() // map[K]V
+
+ keycopy, valcopy, keybase, valbase := mapEncodeScratch(p.mtype)
+
+ n := 0
+ for _, key := range v.MapKeys() {
+ val := v.MapIndex(key)
+ keycopy.Set(key)
+ valcopy.Set(val)
+
+ // Tag codes for key and val are the responsibility of the sub-sizer.
+ keysize := p.mkeyprop.size(p.mkeyprop, keybase)
+ valsize := p.mvalprop.size(p.mvalprop, valbase)
+ entry := keysize + valsize
+ // Add on tag code and length of map entry itself.
+ n += len(p.tagcode) + sizeVarint(uint64(entry)) + entry
+ }
+ return n
+}
+
+// mapEncodeScratch returns a new reflect.Value matching the map's value type,
+// and a structPointer suitable for passing to an encoder or sizer.
+func mapEncodeScratch(mapType reflect.Type) (keycopy, valcopy reflect.Value, keybase, valbase structPointer) {
+ // Prepare addressable doubly-indirect placeholders for the key and value types.
+ // This is needed because the element-type encoders expect **T, but the map iteration produces T.
+
+ keycopy = reflect.New(mapType.Key()).Elem() // addressable K
+ keyptr := reflect.New(reflect.PtrTo(keycopy.Type())).Elem() // addressable *K
+ keyptr.Set(keycopy.Addr()) //
+ keybase = toStructPointer(keyptr.Addr()) // **K
+
+ // Value types are more varied and require special handling.
+ switch mapType.Elem().Kind() {
+ case reflect.Slice:
+ // []byte
+ var dummy []byte
+ valcopy = reflect.ValueOf(&dummy).Elem() // addressable []byte
+ valbase = toStructPointer(valcopy.Addr())
+ case reflect.Ptr:
+ // message; the generated field type is map[K]*Msg (so V is *Msg),
+ // so we only need one level of indirection.
+ valcopy = reflect.New(mapType.Elem()).Elem() // addressable V
+ valbase = toStructPointer(valcopy.Addr())
+ default:
+ // everything else
+ valcopy = reflect.New(mapType.Elem()).Elem() // addressable V
+ valptr := reflect.New(reflect.PtrTo(valcopy.Type())).Elem() // addressable *V
+ valptr.Set(valcopy.Addr()) //
+ valbase = toStructPointer(valptr.Addr()) // **V
+ }
+ return
+}
+
+// Encode a struct.
+func (o *Buffer) enc_struct(prop *StructProperties, base structPointer) error {
+ var state errorState
+ // Encode fields in tag order so that decoders may use optimizations
+ // that depend on the ordering.
+ // https://developers.google.com/protocol-buffers/docs/encoding#order
+ for _, i := range prop.order {
+ p := prop.Prop[i]
+ if p.enc != nil {
+ err := p.enc(o, p, base)
+ if err != nil {
+ if err == ErrNil {
+ if p.Required && state.err == nil {
+ state.err = &RequiredNotSetError{p.Name}
+ }
+ } else if err == errRepeatedHasNil {
+ // Give more context to nil values in repeated fields.
+ return errors.New("repeated field " + p.OrigName + " has nil element")
+ } else if !state.shouldContinue(err, p) {
+ return err
+ }
+ }
+ if len(o.buf) > maxMarshalSize {
+ return ErrTooLarge
+ }
+ }
+ }
+
+ // Do oneof fields.
+ if prop.oneofMarshaler != nil {
+ m := structPointer_Interface(base, prop.stype).(Message)
+ if err := prop.oneofMarshaler(m, o); err == ErrNil {
+ return errOneofHasNil
+ } else if err != nil {
+ return err
+ }
+ }
+
+ // Add unrecognized fields at the end.
+ if prop.unrecField.IsValid() {
+ v := *structPointer_Bytes(base, prop.unrecField)
+ if len(o.buf)+len(v) > maxMarshalSize {
+ return ErrTooLarge
+ }
+ if len(v) > 0 {
+ o.buf = append(o.buf, v...)
+ }
+ }
+
+ return state.err
+}
+
+func size_struct(prop *StructProperties, base structPointer) (n int) {
+ for _, i := range prop.order {
+ p := prop.Prop[i]
+ if p.size != nil {
+ n += p.size(p, base)
+ }
+ }
+
+ // Add unrecognized fields at the end.
+ if prop.unrecField.IsValid() {
+ v := *structPointer_Bytes(base, prop.unrecField)
+ n += len(v)
+ }
+
+ // Factor in any oneof fields.
+ if prop.oneofSizer != nil {
+ m := structPointer_Interface(base, prop.stype).(Message)
+ n += prop.oneofSizer(m)
+ }
+
+ return
+}
+
+var zeroes [20]byte // longer than any conceivable sizeVarint
+
+// Encode a struct, preceded by its encoded length (as a varint).
+func (o *Buffer) enc_len_struct(prop *StructProperties, base structPointer, state *errorState) error {
+ return o.enc_len_thing(func() error { return o.enc_struct(prop, base) }, state)
+}
+
+// Encode something, preceded by its encoded length (as a varint).
+func (o *Buffer) enc_len_thing(enc func() error, state *errorState) error {
+ iLen := len(o.buf)
+ o.buf = append(o.buf, 0, 0, 0, 0) // reserve four bytes for length
+ iMsg := len(o.buf)
+ err := enc()
+ if err != nil && !state.shouldContinue(err, nil) {
+ return err
+ }
+ lMsg := len(o.buf) - iMsg
+ lLen := sizeVarint(uint64(lMsg))
+ switch x := lLen - (iMsg - iLen); {
+ case x > 0: // actual length is x bytes larger than the space we reserved
+ // Move msg x bytes right.
+ o.buf = append(o.buf, zeroes[:x]...)
+ copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
+ case x < 0: // actual length is x bytes smaller than the space we reserved
+ // Move msg x bytes left.
+ copy(o.buf[iMsg+x:], o.buf[iMsg:iMsg+lMsg])
+ o.buf = o.buf[:len(o.buf)+x] // x is negative
+ }
+ // Encode the length in the reserved space.
+ o.buf = o.buf[:iLen]
+ o.EncodeVarint(uint64(lMsg))
+ o.buf = o.buf[:len(o.buf)+lMsg]
+ return state.err
+}
+
+// errorState maintains the first error that occurs and updates that error
+// with additional context.
+type errorState struct {
+ err error
+}
+
+// shouldContinue reports whether encoding should continue upon encountering the
+// given error. If the error is RequiredNotSetError, shouldContinue returns true
+// and, if this is the first appearance of that error, remembers it for future
+// reporting.
+//
+// If prop is not nil, it may update any error with additional context about the
+// field with the error.
+func (s *errorState) shouldContinue(err error, prop *Properties) bool {
+ // Ignore unset required fields.
+ reqNotSet, ok := err.(*RequiredNotSetError)
+ if !ok {
+ return false
+ }
+ if s.err == nil {
+ if prop != nil {
+ err = &RequiredNotSetError{prop.Name + "." + reqNotSet.field}
+ }
+ s.err = err
+ }
+ return true
+}
generated by cgit v1.2.3-54-g00ecf (git 2.39.0) at 2024-11-17 01:30:49 +0000