diff options
author | Javier Peletier <jm@epiclabs.io> | 2018-09-30 15:51:11 +0800 |
---|---|---|
committer | Javier Peletier <jm@epiclabs.io> | 2018-10-03 15:12:06 +0800 |
commit | b6ccc06cdaac80d09da17c25b2f450cd1f1b7914 (patch) | |
tree | 2413da1a2025e901eecf253399fe4bfebbdd1925 /swarm/storage/mru/view.go | |
parent | 83705ef6aa3645a6305a400fa175e44904a929f7 (diff) | |
download | go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar.gz go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar.bz2 go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar.lz go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar.xz go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.tar.zst go-tangerine-b6ccc06cdaac80d09da17c25b2f450cd1f1b7914.zip |
swarm/storage/feeds: Final package rename and moved files
Diffstat (limited to 'swarm/storage/mru/view.go')
-rw-r--r-- | swarm/storage/mru/view.go | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/swarm/storage/mru/view.go b/swarm/storage/mru/view.go deleted file mode 100644 index 8d21ef7a4..000000000 --- a/swarm/storage/mru/view.go +++ /dev/null @@ -1,125 +0,0 @@ -// Copyright 2018 The go-ethereum Authors -// This file is part of the go-ethereum library. -// -// The go-ethereum library is free software: you can redistribute it and/or modify -// 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, -// but WITHOUT ANY WARRANTY; without even the implied warranty of -// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -// 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/>. - -package mru - -import ( - "hash" - "unsafe" - - "github.com/ethereum/go-ethereum/common" - "github.com/ethereum/go-ethereum/common/hexutil" - "github.com/ethereum/go-ethereum/swarm/storage" -) - -// Feed represents a particular user's stream of updates on a Topic -type Feed struct { - Topic Topic `json:"topic"` - User common.Address `json:"user"` -} - -// Feed layout: -// TopicLength bytes -// userAddr common.AddressLength bytes -const feedLength = TopicLength + common.AddressLength - -// mapKey calculates a unique id for this feed. Used by the cache map in `Handler` -func (u *Feed) mapKey() uint64 { - serializedData := make([]byte, feedLength) - u.binaryPut(serializedData) - hasher := hashPool.Get().(hash.Hash) - defer hashPool.Put(hasher) - hasher.Reset() - hasher.Write(serializedData) - hash := hasher.Sum(nil) - return *(*uint64)(unsafe.Pointer(&hash[0])) -} - -// binaryPut serializes this Feed instance into the provided slice -func (u *Feed) binaryPut(serializedData []byte) error { - if len(serializedData) != feedLength { - return NewErrorf(ErrInvalidValue, "Incorrect slice size to serialize Feed. Expected %d, got %d", feedLength, len(serializedData)) - } - var cursor int - copy(serializedData[cursor:cursor+TopicLength], u.Topic[:TopicLength]) - cursor += TopicLength - - copy(serializedData[cursor:cursor+common.AddressLength], u.User[:]) - cursor += common.AddressLength - - return nil -} - -// binaryLength returns the expected size of this structure when serialized -func (u *Feed) binaryLength() int { - return feedLength -} - -// binaryGet restores the current instance from the information contained in the passed slice -func (u *Feed) binaryGet(serializedData []byte) error { - if len(serializedData) != feedLength { - return NewErrorf(ErrInvalidValue, "Incorrect slice size to read Feed. Expected %d, got %d", feedLength, len(serializedData)) - } - - var cursor int - copy(u.Topic[:], serializedData[cursor:cursor+TopicLength]) - cursor += TopicLength - - copy(u.User[:], serializedData[cursor:cursor+common.AddressLength]) - cursor += common.AddressLength - - return nil -} - -// Hex serializes the Feed to a hex string -func (u *Feed) Hex() string { - serializedData := make([]byte, feedLength) - u.binaryPut(serializedData) - return hexutil.Encode(serializedData) -} - -// FromValues deserializes this instance from a string key-value store -// useful to parse query strings -func (u *Feed) FromValues(values Values) (err error) { - topic := values.Get("topic") - if topic != "" { - if err := u.Topic.FromHex(values.Get("topic")); err != nil { - return err - } - } else { // see if the user set name and relatedcontent - name := values.Get("name") - relatedContent, _ := hexutil.Decode(values.Get("relatedcontent")) - if len(relatedContent) > 0 { - if len(relatedContent) < storage.AddressLength { - return NewErrorf(ErrInvalidValue, "relatedcontent field must be a hex-encoded byte array exactly %d bytes long", storage.AddressLength) - } - relatedContent = relatedContent[:storage.AddressLength] - } - u.Topic, err = NewTopic(name, relatedContent) - if err != nil { - return err - } - } - u.User = common.HexToAddress(values.Get("user")) - return nil -} - -// AppendValues serializes this structure into the provided string key-value store -// useful to build query strings -func (u *Feed) AppendValues(values Values) { - values.Set("topic", u.Topic.Hex()) - values.Set("user", u.User.Hex()) -} |