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path: root/vendor/github.com/golang/protobuf/proto/decode.go
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Diffstat (limited to 'vendor/github.com/golang/protobuf/proto/decode.go')
-rw-r--r--vendor/github.com/golang/protobuf/proto/decode.go427
1 files changed, 0 insertions, 427 deletions
diff --git a/vendor/github.com/golang/protobuf/proto/decode.go b/vendor/github.com/golang/protobuf/proto/decode.go
deleted file mode 100644
index 63b0f08be..000000000
--- a/vendor/github.com/golang/protobuf/proto/decode.go
+++ /dev/null
@@ -1,427 +0,0 @@
-// 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 decoding protocol buffer data to construct in-memory representations.
- */
-
-import (
- "errors"
- "fmt"
- "io"
-)
-
-// errOverflow is returned when an integer is too large to be represented.
-var errOverflow = errors.New("proto: integer overflow")
-
-// ErrInternalBadWireType is returned by generated code when an incorrect
-// wire type is encountered. It does not get returned to user code.
-var ErrInternalBadWireType = errors.New("proto: internal error: bad wiretype for oneof")
-
-// DecodeVarint reads a varint-encoded integer from the slice.
-// It returns the integer and the number of bytes consumed, or
-// zero if there is not enough.
-// This is the format for the
-// int32, int64, uint32, uint64, bool, and enum
-// protocol buffer types.
-func DecodeVarint(buf []byte) (x uint64, n int) {
- for shift := uint(0); shift < 64; shift += 7 {
- if n >= len(buf) {
- return 0, 0
- }
- b := uint64(buf[n])
- n++
- x |= (b & 0x7F) << shift
- if (b & 0x80) == 0 {
- return x, n
- }
- }
-
- // The number is too large to represent in a 64-bit value.
- return 0, 0
-}
-
-func (p *Buffer) decodeVarintSlow() (x uint64, err error) {
- i := p.index
- l := len(p.buf)
-
- for shift := uint(0); shift < 64; shift += 7 {
- if i >= l {
- err = io.ErrUnexpectedEOF
- return
- }
- b := p.buf[i]
- i++
- x |= (uint64(b) & 0x7F) << shift
- if b < 0x80 {
- p.index = i
- return
- }
- }
-
- // The number is too large to represent in a 64-bit value.
- err = errOverflow
- return
-}
-
-// DecodeVarint reads a varint-encoded integer from the Buffer.
-// This is the format for the
-// int32, int64, uint32, uint64, bool, and enum
-// protocol buffer types.
-func (p *Buffer) DecodeVarint() (x uint64, err error) {
- i := p.index
- buf := p.buf
-
- if i >= len(buf) {
- return 0, io.ErrUnexpectedEOF
- } else if buf[i] < 0x80 {
- p.index++
- return uint64(buf[i]), nil
- } else if len(buf)-i < 10 {
- return p.decodeVarintSlow()
- }
-
- var b uint64
- // we already checked the first byte
- x = uint64(buf[i]) - 0x80
- i++
-
- b = uint64(buf[i])
- i++
- x += b << 7
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 7
-
- b = uint64(buf[i])
- i++
- x += b << 14
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 14
-
- b = uint64(buf[i])
- i++
- x += b << 21
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 21
-
- b = uint64(buf[i])
- i++
- x += b << 28
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 28
-
- b = uint64(buf[i])
- i++
- x += b << 35
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 35
-
- b = uint64(buf[i])
- i++
- x += b << 42
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 42
-
- b = uint64(buf[i])
- i++
- x += b << 49
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 49
-
- b = uint64(buf[i])
- i++
- x += b << 56
- if b&0x80 == 0 {
- goto done
- }
- x -= 0x80 << 56
-
- b = uint64(buf[i])
- i++
- x += b << 63
- if b&0x80 == 0 {
- goto done
- }
-
- return 0, errOverflow
-
-done:
- p.index = i
- return x, nil
-}
-
-// DecodeFixed64 reads a 64-bit integer from the Buffer.
-// This is the format for the
-// fixed64, sfixed64, and double protocol buffer types.
-func (p *Buffer) DecodeFixed64() (x uint64, err error) {
- // x, err already 0
- i := p.index + 8
- if i < 0 || i > len(p.buf) {
- err = io.ErrUnexpectedEOF
- return
- }
- p.index = i
-
- x = uint64(p.buf[i-8])
- x |= uint64(p.buf[i-7]) << 8
- x |= uint64(p.buf[i-6]) << 16
- x |= uint64(p.buf[i-5]) << 24
- x |= uint64(p.buf[i-4]) << 32
- x |= uint64(p.buf[i-3]) << 40
- x |= uint64(p.buf[i-2]) << 48
- x |= uint64(p.buf[i-1]) << 56
- return
-}
-
-// DecodeFixed32 reads a 32-bit integer from the Buffer.
-// This is the format for the
-// fixed32, sfixed32, and float protocol buffer types.
-func (p *Buffer) DecodeFixed32() (x uint64, err error) {
- // x, err already 0
- i := p.index + 4
- if i < 0 || i > len(p.buf) {
- err = io.ErrUnexpectedEOF
- return
- }
- p.index = i
-
- x = uint64(p.buf[i-4])
- x |= uint64(p.buf[i-3]) << 8
- x |= uint64(p.buf[i-2]) << 16
- x |= uint64(p.buf[i-1]) << 24
- return
-}
-
-// DecodeZigzag64 reads a zigzag-encoded 64-bit integer
-// from the Buffer.
-// This is the format used for the sint64 protocol buffer type.
-func (p *Buffer) DecodeZigzag64() (x uint64, err error) {
- x, err = p.DecodeVarint()
- if err != nil {
- return
- }
- x = (x >> 1) ^ uint64((int64(x&1)<<63)>>63)
- return
-}
-
-// DecodeZigzag32 reads a zigzag-encoded 32-bit integer
-// from the Buffer.
-// This is the format used for the sint32 protocol buffer type.
-func (p *Buffer) DecodeZigzag32() (x uint64, err error) {
- x, err = p.DecodeVarint()
- if err != nil {
- return
- }
- x = uint64((uint32(x) >> 1) ^ uint32((int32(x&1)<<31)>>31))
- return
-}
-
-// DecodeRawBytes reads a count-delimited byte buffer from the Buffer.
-// This is the format used for the bytes protocol buffer
-// type and for embedded messages.
-func (p *Buffer) DecodeRawBytes(alloc bool) (buf []byte, err error) {
- n, err := p.DecodeVarint()
- if err != nil {
- return nil, err
- }
-
- nb := int(n)
- if nb < 0 {
- return nil, fmt.Errorf("proto: bad byte length %d", nb)
- }
- end := p.index + nb
- if end < p.index || end > len(p.buf) {
- return nil, io.ErrUnexpectedEOF
- }
-
- if !alloc {
- // todo: check if can get more uses of alloc=false
- buf = p.buf[p.index:end]
- p.index += nb
- return
- }
-
- buf = make([]byte, nb)
- copy(buf, p.buf[p.index:])
- p.index += nb
- return
-}
-
-// DecodeStringBytes reads an encoded string from the Buffer.
-// This is the format used for the proto2 string type.
-func (p *Buffer) DecodeStringBytes() (s string, err error) {
- buf, err := p.DecodeRawBytes(false)
- if err != nil {
- return
- }
- return string(buf), nil
-}
-
-// Unmarshaler is the interface representing objects that can
-// unmarshal themselves. The argument points to data that may be
-// overwritten, so implementations should not keep references to the
-// buffer.
-// Unmarshal implementations should not clear the receiver.
-// Any unmarshaled data should be merged into the receiver.
-// Callers of Unmarshal that do not want to retain existing data
-// should Reset the receiver before calling Unmarshal.
-type Unmarshaler interface {
- Unmarshal([]byte) error
-}
-
-// newUnmarshaler is the interface representing objects that can
-// unmarshal themselves. The semantics are identical to Unmarshaler.
-//
-// This exists to support protoc-gen-go generated messages.
-// The proto package will stop type-asserting to this interface in the future.
-//
-// DO NOT DEPEND ON THIS.
-type newUnmarshaler interface {
- XXX_Unmarshal([]byte) error
-}
-
-// Unmarshal parses the protocol buffer representation in buf and places the
-// decoded result in pb. If the struct underlying pb does not match
-// the data in buf, the results can be unpredictable.
-//
-// Unmarshal resets pb before starting to unmarshal, so any
-// existing data in pb is always removed. Use UnmarshalMerge
-// to preserve and append to existing data.
-func Unmarshal(buf []byte, pb Message) error {
- pb.Reset()
- if u, ok := pb.(newUnmarshaler); ok {
- return u.XXX_Unmarshal(buf)
- }
- if u, ok := pb.(Unmarshaler); ok {
- return u.Unmarshal(buf)
- }
- return NewBuffer(buf).Unmarshal(pb)
-}
-
-// UnmarshalMerge parses the protocol buffer representation in buf and
-// writes the decoded result to pb. If the struct underlying pb does not match
-// the data in buf, the results can be unpredictable.
-//
-// UnmarshalMerge merges into existing data in pb.
-// Most code should use Unmarshal instead.
-func UnmarshalMerge(buf []byte, pb Message) error {
- if u, ok := pb.(newUnmarshaler); ok {
- return u.XXX_Unmarshal(buf)
- }
- if u, ok := pb.(Unmarshaler); ok {
- // NOTE: The history of proto have unfortunately been inconsistent
- // whether Unmarshaler should or should not implicitly clear itself.
- // Some implementations do, most do not.
- // Thus, calling this here may or may not do what people want.
- //
- // See https://github.com/golang/protobuf/issues/424
- return u.Unmarshal(buf)
- }
- return NewBuffer(buf).Unmarshal(pb)
-}
-
-// DecodeMessage reads a count-delimited message from the Buffer.
-func (p *Buffer) DecodeMessage(pb Message) error {
- enc, err := p.DecodeRawBytes(false)
- if err != nil {
- return err
- }
- return NewBuffer(enc).Unmarshal(pb)
-}
-
-// DecodeGroup reads a tag-delimited group from the Buffer.
-// StartGroup tag is already consumed. This function consumes
-// EndGroup tag.
-func (p *Buffer) DecodeGroup(pb Message) error {
- b := p.buf[p.index:]
- x, y := findEndGroup(b)
- if x < 0 {
- return io.ErrUnexpectedEOF
- }
- err := Unmarshal(b[:x], pb)
- p.index += y
- return err
-}
-
-// Unmarshal parses the protocol buffer representation in the
-// Buffer and places the decoded result in pb. If the struct
-// underlying pb does not match the data in the buffer, the results can be
-// unpredictable.
-//
-// Unlike proto.Unmarshal, this does not reset pb before starting to unmarshal.
-func (p *Buffer) Unmarshal(pb Message) error {
- // If the object can unmarshal itself, let it.
- if u, ok := pb.(newUnmarshaler); ok {
- err := u.XXX_Unmarshal(p.buf[p.index:])
- p.index = len(p.buf)
- return err
- }
- if u, ok := pb.(Unmarshaler); ok {
- // NOTE: The history of proto have unfortunately been inconsistent
- // whether Unmarshaler should or should not implicitly clear itself.
- // Some implementations do, most do not.
- // Thus, calling this here may or may not do what people want.
- //
- // See https://github.com/golang/protobuf/issues/424
- err := u.Unmarshal(p.buf[p.index:])
- p.index = len(p.buf)
- return err
- }
-
- // Slow workaround for messages that aren't Unmarshalers.
- // This includes some hand-coded .pb.go files and
- // bootstrap protos.
- // TODO: fix all of those and then add Unmarshal to
- // the Message interface. Then:
- // The cast above and code below can be deleted.
- // The old unmarshaler can be deleted.
- // Clients can call Unmarshal directly (can already do that, actually).
- var info InternalMessageInfo
- err := info.Unmarshal(pb, p.buf[p.index:])
- p.index = len(p.buf)
- return err
-}