plugeth/rlp/encode.go

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// Copyright 2014 The go-ethereum Authors
// This file is part of the go-ethereum library.
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//
// The go-ethereum library is free software: you can redistribute it and/or modify
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// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// The go-ethereum library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
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package rlp
import (
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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"errors"
"fmt"
"io"
"math/big"
"reflect"
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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"github.com/ethereum/go-ethereum/rlp/internal/rlpstruct"
"github.com/holiman/uint256"
)
var (
// Common encoded values.
// These are useful when implementing EncodeRLP.
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// EmptyString is the encoding of an empty string.
EmptyString = []byte{0x80}
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// EmptyList is the encoding of an empty list.
EmptyList = []byte{0xC0}
)
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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var ErrNegativeBigInt = errors.New("rlp: cannot encode negative big.Int")
// Encoder is implemented by types that require custom
// encoding rules or want to encode private fields.
type Encoder interface {
// EncodeRLP should write the RLP encoding of its receiver to w.
// If the implementation is a pointer method, it may also be
// called for nil pointers.
//
// Implementations should generate valid RLP. The data written is
// not verified at the moment, but a future version might. It is
// recommended to write only a single value but writing multiple
// values or no value at all is also permitted.
EncodeRLP(io.Writer) error
}
// Encode writes the RLP encoding of val to w. Note that Encode may
// perform many small writes in some cases. Consider making w
// buffered.
//
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
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// Please see package-level documentation of encoding rules.
func Encode(w io.Writer, val interface{}) error {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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// Optimization: reuse *encBuffer when called by EncodeRLP.
if buf := encBufferFromWriter(w); buf != nil {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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return buf.encode(val)
}
buf := getEncBuffer()
defer encBufferPool.Put(buf)
if err := buf.encode(val); err != nil {
return err
}
return buf.writeTo(w)
}
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// EncodeToBytes returns the RLP encoding of val.
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
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// Please see package-level documentation for the encoding rules.
func EncodeToBytes(val interface{}) ([]byte, error) {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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buf := getEncBuffer()
defer encBufferPool.Put(buf)
if err := buf.encode(val); err != nil {
return nil, err
}
return buf.makeBytes(), nil
}
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// EncodeToReader returns a reader from which the RLP encoding of val
// can be read. The returned size is the total size of the encoded
// data.
//
// Please see the documentation of Encode for the encoding rules.
func EncodeToReader(val interface{}) (size int, r io.Reader, err error) {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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buf := getEncBuffer()
if err := buf.encode(val); err != nil {
encBufferPool.Put(buf)
return 0, nil, err
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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// Note: can't put the reader back into the pool here
// because it is held by encReader. The reader puts it
// back when it has been fully consumed.
return buf.size(), &encReader{buf: buf}, nil
}
type listhead struct {
offset int // index of this header in string data
size int // total size of encoded data (including list headers)
}
// encode writes head to the given buffer, which must be at least
// 9 bytes long. It returns the encoded bytes.
func (head *listhead) encode(buf []byte) []byte {
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return buf[:puthead(buf, 0xC0, 0xF7, uint64(head.size))]
}
// headsize returns the size of a list or string header
// for a value of the given size.
func headsize(size uint64) int {
if size < 56 {
return 1
}
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return 1 + intsize(size)
}
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// puthead writes a list or string header to buf.
// buf must be at least 9 bytes long.
func puthead(buf []byte, smalltag, largetag byte, size uint64) int {
if size < 56 {
buf[0] = smalltag + byte(size)
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return 1
}
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sizesize := putint(buf[1:], size)
buf[0] = largetag + byte(sizesize)
return sizesize + 1
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}
var encoderInterface = reflect.TypeOf(new(Encoder)).Elem()
// makeWriter creates a writer function for the given type.
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func makeWriter(typ reflect.Type, ts rlpstruct.Tags) (writer, error) {
kind := typ.Kind()
switch {
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case typ == rawValueType:
return writeRawValue, nil
case typ.AssignableTo(reflect.PtrTo(bigInt)):
return writeBigIntPtr, nil
case typ.AssignableTo(bigInt):
return writeBigIntNoPtr, nil
case typ == reflect.PtrTo(u256Int):
return writeU256IntPtr, nil
case typ == u256Int:
return writeU256IntNoPtr, nil
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
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case kind == reflect.Ptr:
return makePtrWriter(typ, ts)
case reflect.PtrTo(typ).Implements(encoderInterface):
return makeEncoderWriter(typ), nil
case isUint(kind):
return writeUint, nil
case kind == reflect.Bool:
return writeBool, nil
case kind == reflect.String:
return writeString, nil
case kind == reflect.Slice && isByte(typ.Elem()):
return writeBytes, nil
case kind == reflect.Array && isByte(typ.Elem()):
return makeByteArrayWriter(typ), nil
case kind == reflect.Slice || kind == reflect.Array:
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return makeSliceWriter(typ, ts)
case kind == reflect.Struct:
return makeStructWriter(typ)
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
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case kind == reflect.Interface:
return writeInterface, nil
default:
return nil, fmt.Errorf("rlp: type %v is not RLP-serializable", typ)
}
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func writeRawValue(val reflect.Value, w *encBuffer) error {
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w.str = append(w.str, val.Bytes()...)
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func writeUint(val reflect.Value, w *encBuffer) error {
w.writeUint64(val.Uint())
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeBool(val reflect.Value, w *encBuffer) error {
w.writeBool(val.Bool())
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeBigIntPtr(val reflect.Value, w *encBuffer) error {
ptr := val.Interface().(*big.Int)
if ptr == nil {
w.str = append(w.str, 0x80)
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
if ptr.Sign() == -1 {
return ErrNegativeBigInt
}
w.writeBigInt(ptr)
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeBigIntNoPtr(val reflect.Value, w *encBuffer) error {
i := val.Interface().(big.Int)
if i.Sign() == -1 {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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return ErrNegativeBigInt
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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w.writeBigInt(&i)
return nil
}
func writeU256IntPtr(val reflect.Value, w *encBuffer) error {
ptr := val.Interface().(*uint256.Int)
if ptr == nil {
w.str = append(w.str, 0x80)
return nil
}
w.writeUint256(ptr)
return nil
}
func writeU256IntNoPtr(val reflect.Value, w *encBuffer) error {
i := val.Interface().(uint256.Int)
w.writeUint256(&i)
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func writeBytes(val reflect.Value, w *encBuffer) error {
w.writeBytes(val.Bytes())
return nil
}
func makeByteArrayWriter(typ reflect.Type) writer {
switch typ.Len() {
case 0:
return writeLengthZeroByteArray
case 1:
return writeLengthOneByteArray
default:
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length := typ.Len()
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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return func(val reflect.Value, w *encBuffer) error {
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if !val.CanAddr() {
// Getting the byte slice of val requires it to be addressable. Make it
// addressable by copying.
copy := reflect.New(val.Type()).Elem()
copy.Set(val)
val = copy
}
slice := byteArrayBytes(val, length)
w.encodeStringHeader(len(slice))
w.str = append(w.str, slice...)
return nil
}
}
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeLengthZeroByteArray(val reflect.Value, w *encBuffer) error {
w.str = append(w.str, 0x80)
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeLengthOneByteArray(val reflect.Value, w *encBuffer) error {
b := byte(val.Index(0).Uint())
if b <= 0x7f {
w.str = append(w.str, b)
} else {
w.str = append(w.str, 0x81, b)
}
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func writeString(val reflect.Value, w *encBuffer) error {
s := val.String()
if len(s) == 1 && s[0] <= 0x7f {
// fits single byte, no string header
w.str = append(w.str, s[0])
} else {
w.encodeStringHeader(len(s))
w.str = append(w.str, s...)
}
return nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func writeInterface(val reflect.Value, w *encBuffer) error {
if val.IsNil() {
// Write empty list. This is consistent with the previous RLP
// encoder that we had and should therefore avoid any
// problems.
w.str = append(w.str, 0xC0)
return nil
}
eval := val.Elem()
writer, err := cachedWriter(eval.Type())
if err != nil {
return err
}
return writer(eval, w)
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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func makeSliceWriter(typ reflect.Type, ts rlpstruct.Tags) (writer, error) {
etypeinfo := theTC.infoWhileGenerating(typ.Elem(), rlpstruct.Tags{})
if etypeinfo.writerErr != nil {
return nil, etypeinfo.writerErr
}
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var wfn writer
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
if ts.Tail {
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// This is for struct tail slices.
// w.list is not called for them.
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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wfn = func(val reflect.Value, w *encBuffer) error {
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vlen := val.Len()
for i := 0; i < vlen; i++ {
if err := etypeinfo.writer(val.Index(i), w); err != nil {
return err
}
}
return nil
2015-12-21 20:05:20 +00:00
}
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} else {
// This is for regular slices and arrays.
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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wfn = func(val reflect.Value, w *encBuffer) error {
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vlen := val.Len()
if vlen == 0 {
w.str = append(w.str, 0xC0)
return nil
}
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listOffset := w.list()
for i := 0; i < vlen; i++ {
if err := etypeinfo.writer(val.Index(i), w); err != nil {
return err
}
}
w.listEnd(listOffset)
return nil
}
}
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return wfn, nil
}
func makeStructWriter(typ reflect.Type) (writer, error) {
fields, err := structFields(typ)
if err != nil {
return nil, err
}
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
2019-09-13 09:10:57 +00:00
for _, f := range fields {
if f.info.writerErr != nil {
return nil, structFieldError{typ, f.index, f.info.writerErr}
}
}
var writer writer
firstOptionalField := firstOptionalField(fields)
if firstOptionalField == len(fields) {
// This is the writer function for structs without any optional fields.
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
writer = func(val reflect.Value, w *encBuffer) error {
lh := w.list()
for _, f := range fields {
if err := f.info.writer(val.Field(f.index), w); err != nil {
return err
}
}
w.listEnd(lh)
return nil
}
} else {
// If there are any "optional" fields, the writer needs to perform additional
// checks to determine the output list length.
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
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writer = func(val reflect.Value, w *encBuffer) error {
lastField := len(fields) - 1
for ; lastField >= firstOptionalField; lastField-- {
if !val.Field(fields[lastField].index).IsZero() {
break
}
}
lh := w.list()
for i := 0; i <= lastField; i++ {
if err := fields[i].info.writer(val.Field(fields[i].index), w); err != nil {
return err
}
}
w.listEnd(lh)
return nil
}
}
return writer, nil
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
func makePtrWriter(typ reflect.Type, ts rlpstruct.Tags) (writer, error) {
nilEncoding := byte(0xC0)
if typeNilKind(typ.Elem(), ts) == String {
nilEncoding = 0x80
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
etypeinfo := theTC.infoWhileGenerating(typ.Elem(), rlpstruct.Tags{})
2021-08-25 17:01:10 +00:00
if etypeinfo.writerErr != nil {
return nil, etypeinfo.writerErr
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
writer := func(val reflect.Value, w *encBuffer) error {
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if ev := val.Elem(); ev.IsValid() {
return etypeinfo.writer(ev, w)
}
2021-08-25 17:01:10 +00:00
w.str = append(w.str, nilEncoding)
return nil
}
return writer, nil
}
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
2019-09-13 09:10:57 +00:00
func makeEncoderWriter(typ reflect.Type) writer {
if typ.Implements(encoderInterface) {
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
return func(val reflect.Value, w *encBuffer) error {
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
2019-09-13 09:10:57 +00:00
return val.Interface().(Encoder).EncodeRLP(w)
}
}
rlp/rlpgen: RLP encoder code generator (#24251) This change adds a code generator tool for creating EncodeRLP method implementations. The generated methods will behave identically to the reflect-based encoder, but run faster because there is no reflection overhead. Package rlp now provides the EncoderBuffer type for incremental encoding. This is used by generated code, but the new methods can also be useful for hand-written encoders. There is also experimental support for generating DecodeRLP, and some new methods have been added to the existing Stream type to support this. Creating decoders with rlpgen is not recommended at this time because the generated methods create very poor error reporting. More detail about package rlp changes: * rlp: externalize struct field processing / validation This adds a new package, rlp/internal/rlpstruct, in preparation for the RLP encoder generator. I think the struct field rules are subtle enough to warrant extracting this into their own package, even though it means that a bunch of adapter code is needed for converting to/from rlpstruct.Type. * rlp: add more decoder methods (for rlpgen) This adds new methods on rlp.Stream: - Uint64, Uint32, Uint16, Uint8, BigInt - ReadBytes for decoding into []byte - MoreDataInList - useful for optional list elements * rlp: expose encoder buffer (for rlpgen) This exposes the internal encoder buffer type for use in EncodeRLP implementations. The new EncoderBuffer type is a sort-of 'opaque handle' for a pointer to encBuffer. It is implemented this way to ensure the global encBuffer pool is handled correctly.
2022-02-16 17:14:12 +00:00
w := func(val reflect.Value, w *encBuffer) error {
rlp: improve nil pointer handling (#20064) * rlp: improve nil pointer handling In both encoder and decoder, the rules for encoding nil pointers were a bit hard to understand, and didn't leave much choice. Since RLP allows two empty values (empty list, empty string), any protocol built on RLP must choose either of these values to represent the null value in a certain context. This change adds choice in the form of two new struct tags, "nilString" and "nilList". These can be used to specify how a nil pointer value is encoded. The "nil" tag still exists, but its implementation is now explicit and defines exactly how nil pointers are handled in a single place. Another important change in this commit is how nil pointers and the Encoder interface interact. The EncodeRLP method was previously called even on nil values, which was supposed to give users a choice of how their value would be handled when nil. It turns out this is a stupid idea. If you create a network protocol containing an object defined in another package, it's better to be able to say that the object should be a list or string when nil in the definition of the protocol message rather than defining the encoding of nil on the object itself. As of this commit, the encoding rules for pointers now take precedence over the Encoder interface rule. I think the "nil" tag will work fine for most cases. For special kinds of objects which are a struct in Go but strings in RLP, code using the object can specify the desired encoding of nil using the "nilString" and "nilList" tags. * rlp: propagate struct field type errors If a struct contained fields of undecodable type, the encoder and decoder would panic instead of returning an error. Fix this by propagating type errors in makeStruct{Writer,Decoder} and add a test.
2019-09-13 09:10:57 +00:00
if !val.CanAddr() {
// package json simply doesn't call MarshalJSON for this case, but encodes the
// value as if it didn't implement the interface. We don't want to handle it that
// way.
return fmt.Errorf("rlp: unadressable value of type %v, EncodeRLP is pointer method", val.Type())
}
return val.Addr().Interface().(Encoder).EncodeRLP(w)
}
return w
}
// putint writes i to the beginning of b in big endian byte
// order, using the least number of bytes needed to represent i.
func putint(b []byte, i uint64) (size int) {
switch {
case i < (1 << 8):
b[0] = byte(i)
return 1
case i < (1 << 16):
b[0] = byte(i >> 8)
b[1] = byte(i)
return 2
case i < (1 << 24):
b[0] = byte(i >> 16)
b[1] = byte(i >> 8)
b[2] = byte(i)
return 3
case i < (1 << 32):
b[0] = byte(i >> 24)
b[1] = byte(i >> 16)
b[2] = byte(i >> 8)
b[3] = byte(i)
return 4
case i < (1 << 40):
b[0] = byte(i >> 32)
b[1] = byte(i >> 24)
b[2] = byte(i >> 16)
b[3] = byte(i >> 8)
b[4] = byte(i)
return 5
case i < (1 << 48):
b[0] = byte(i >> 40)
b[1] = byte(i >> 32)
b[2] = byte(i >> 24)
b[3] = byte(i >> 16)
b[4] = byte(i >> 8)
b[5] = byte(i)
return 6
case i < (1 << 56):
b[0] = byte(i >> 48)
b[1] = byte(i >> 40)
b[2] = byte(i >> 32)
b[3] = byte(i >> 24)
b[4] = byte(i >> 16)
b[5] = byte(i >> 8)
b[6] = byte(i)
return 7
default:
b[0] = byte(i >> 56)
b[1] = byte(i >> 48)
b[2] = byte(i >> 40)
b[3] = byte(i >> 32)
b[4] = byte(i >> 24)
b[5] = byte(i >> 16)
b[6] = byte(i >> 8)
b[7] = byte(i)
return 8
}
}
// intsize computes the minimum number of bytes required to store i.
func intsize(i uint64) (size int) {
for size = 1; ; size++ {
if i >>= 8; i == 0 {
return size
}
}
}