65aaa607ab
Change made by: - running "gvt fetch" on each of the packages mentioned in Godeps/Godeps.json - `rm -rf Godeps` - tweaking the build scripts to not mention Godeps - tweaking the build scripts to test `./lib/...`, `./cmd/...` explicitly (to avoid testing vendor) - tweaking the build scripts to not juggle GOPATH for Godeps and instead set GO15VENDOREXPERIMENT. This also results in some updated packages at the same time I bet. Building with Go 1.3 and 1.4 still *works* but won't use our vendored dependencies - the user needs to have the actual packages in their GOPATH then, which they'll get with a normal "go get". Building with Go 1.6+ will get our vendored dependencies by default even when not using our build script, which is nice. By doing this we gain some freedom in that we can pick and choose manually what to include in vendor, as it's not based on just dependency analysis of our own code. This is also a risk as we might pick up dependencies we are unaware of, as the build may work locally with those packages present in GOPATH. On the other hand the build server will detect this as it has no packages in it's GOPATH beyond what is included in the repo. Recommended tool to manage dependencies is github.com/FiloSottile/gvt.
185 lines
3.3 KiB
Go
185 lines
3.3 KiB
Go
// Copyright (c) 2014, Suryandaru Triandana <syndtr@gmail.com>
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// All rights reserved.
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//
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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package iterator
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import (
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"github.com/syndtr/goleveldb/leveldb/util"
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)
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// BasicArray is the interface that wraps basic Len and Search method.
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type BasicArray interface {
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// Len returns length of the array.
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Len() int
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// Search finds smallest index that point to a key that is greater
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// than or equal to the given key.
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Search(key []byte) int
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}
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// Array is the interface that wraps BasicArray and basic Index method.
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type Array interface {
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BasicArray
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// Index returns key/value pair with index of i.
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Index(i int) (key, value []byte)
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}
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// Array is the interface that wraps BasicArray and basic Get method.
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type ArrayIndexer interface {
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BasicArray
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// Get returns a new data iterator with index of i.
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Get(i int) Iterator
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}
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type basicArrayIterator struct {
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util.BasicReleaser
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array BasicArray
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pos int
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err error
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}
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func (i *basicArrayIterator) Valid() bool {
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return i.pos >= 0 && i.pos < i.array.Len() && !i.Released()
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}
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func (i *basicArrayIterator) First() bool {
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if i.Released() {
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i.err = ErrIterReleased
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return false
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}
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if i.array.Len() == 0 {
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i.pos = -1
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return false
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}
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i.pos = 0
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return true
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}
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func (i *basicArrayIterator) Last() bool {
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if i.Released() {
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i.err = ErrIterReleased
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return false
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}
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n := i.array.Len()
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if n == 0 {
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i.pos = 0
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return false
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}
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i.pos = n - 1
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return true
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}
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func (i *basicArrayIterator) Seek(key []byte) bool {
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if i.Released() {
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i.err = ErrIterReleased
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return false
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}
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n := i.array.Len()
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if n == 0 {
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i.pos = 0
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return false
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}
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i.pos = i.array.Search(key)
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if i.pos >= n {
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return false
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}
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return true
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}
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func (i *basicArrayIterator) Next() bool {
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if i.Released() {
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i.err = ErrIterReleased
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return false
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}
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i.pos++
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if n := i.array.Len(); i.pos >= n {
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i.pos = n
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return false
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}
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return true
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}
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func (i *basicArrayIterator) Prev() bool {
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if i.Released() {
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i.err = ErrIterReleased
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return false
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}
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i.pos--
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if i.pos < 0 {
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i.pos = -1
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return false
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}
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return true
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}
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func (i *basicArrayIterator) Error() error { return i.err }
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type arrayIterator struct {
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basicArrayIterator
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array Array
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pos int
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key, value []byte
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}
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func (i *arrayIterator) updateKV() {
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if i.pos == i.basicArrayIterator.pos {
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return
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}
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i.pos = i.basicArrayIterator.pos
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if i.Valid() {
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i.key, i.value = i.array.Index(i.pos)
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} else {
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i.key = nil
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i.value = nil
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}
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}
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func (i *arrayIterator) Key() []byte {
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i.updateKV()
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return i.key
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}
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func (i *arrayIterator) Value() []byte {
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i.updateKV()
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return i.value
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}
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type arrayIteratorIndexer struct {
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basicArrayIterator
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array ArrayIndexer
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}
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func (i *arrayIteratorIndexer) Get() Iterator {
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if i.Valid() {
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return i.array.Get(i.basicArrayIterator.pos)
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}
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return nil
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}
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// NewArrayIterator returns an iterator from the given array.
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func NewArrayIterator(array Array) Iterator {
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return &arrayIterator{
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basicArrayIterator: basicArrayIterator{array: array, pos: -1},
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array: array,
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pos: -1,
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}
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}
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// NewArrayIndexer returns an index iterator from the given array.
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func NewArrayIndexer(array ArrayIndexer) IteratorIndexer {
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return &arrayIteratorIndexer{
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basicArrayIterator: basicArrayIterator{array: array, pos: -1},
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array: array,
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}
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}
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