diff options
Diffstat (limited to 'vendor/github.com/golang/protobuf/proto/decode.go')
| -rw-r--r-- | vendor/github.com/golang/protobuf/proto/decode.go | 427 |
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 63b0f08b..00000000 --- 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 -} |