mirror of
https://gitlab.com/pulsechaincom/erigon-pulse.git
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552f5b2693
I'm reasonably confident that the encoding matches the output of ethutil.Encode for values that it supports. Some of the tests have been adpated from the Ethereum testing repository. There are still TODOs in the code.
82 lines
1.8 KiB
Go
82 lines
1.8 KiB
Go
package rlp
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import (
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"reflect"
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"sync"
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)
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var (
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typeCacheMutex sync.RWMutex
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typeCache = make(map[reflect.Type]*typeinfo)
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)
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type typeinfo struct {
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decoder
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writer
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}
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type decoder func(*Stream, reflect.Value) error
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type writer func(reflect.Value, *encbuf) error
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func cachedTypeInfo(typ reflect.Type) (*typeinfo, error) {
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typeCacheMutex.RLock()
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info := typeCache[typ]
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typeCacheMutex.RUnlock()
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if info != nil {
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return info, nil
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}
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// not in the cache, need to generate info for this type.
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typeCacheMutex.Lock()
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defer typeCacheMutex.Unlock()
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return cachedTypeInfo1(typ)
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}
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func cachedTypeInfo1(typ reflect.Type) (*typeinfo, error) {
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info := typeCache[typ]
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if info != nil {
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// another goroutine got the write lock first
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return info, nil
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}
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// put a dummmy value into the cache before generating.
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// if the generator tries to lookup itself, it will get
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// the dummy value and won't call itself recursively.
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typeCache[typ] = new(typeinfo)
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info, err := genTypeInfo(typ)
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if err != nil {
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// remove the dummy value if the generator fails
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delete(typeCache, typ)
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return nil, err
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}
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*typeCache[typ] = *info
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return typeCache[typ], err
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}
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func structFields(typ reflect.Type) (fields []field, err error) {
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for i := 0; i < typ.NumField(); i++ {
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if f := typ.Field(i); f.PkgPath == "" { // exported
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info, err := cachedTypeInfo1(f.Type)
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if err != nil {
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return nil, err
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}
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fields = append(fields, field{i, info})
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}
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}
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return fields, nil
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}
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func genTypeInfo(typ reflect.Type) (info *typeinfo, err error) {
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info = new(typeinfo)
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if info.decoder, err = makeDecoder(typ); err != nil {
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return nil, err
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}
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if info.writer, err = makeWriter(typ); err != nil {
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return nil, err
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}
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return info, nil
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}
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func isUint(k reflect.Kind) bool {
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return k >= reflect.Uint && k <= reflect.Uintptr
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}
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