d8dfun/virtual-kubelet
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases 1 Wiki Activity

Initial commit

Browse Source
This commit is contained in:
Ria Bhatia
2017-12-04 13:32:57 -06:00
committed by Erik St. Martin
commit 0075e5b0f3
9056 changed files with 2523100 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

1
vendor/github.com/google/btree/.travis.yml generated vendored Normal file
View File

@@ -0,0 +1 @@
language: go

202
vendor/github.com/google/btree/LICENSE generated vendored Normal file
View File

@@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

12
vendor/github.com/google/btree/README.md generated vendored Normal file
View File

@@ -0,0 +1,12 @@
# BTree implementation for Go
![Travis CI Build Status](https://api.travis-ci.org/google/btree.svg?branch=master)
This package provides an in-memory B-Tree implementation for Go, useful as
an ordered, mutable data structure.
The API is based off of the wonderful
http://godoc.org/github.com/petar/GoLLRB/llrb, and is meant to allow btree to
act as a drop-in replacement for gollrb trees.
See http://godoc.org/github.com/google/btree for documentation.

821
vendor/github.com/google/btree/btree.go generated vendored Normal file
View File

@@ -0,0 +1,821 @@
// Copyright 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// Package btree implements in-memory B-Trees of arbitrary degree.
//
// btree implements an in-memory B-Tree for use as an ordered data structure.
// It is not meant for persistent storage solutions.
//
// It has a flatter structure than an equivalent red-black or other binary tree,
// which in some cases yields better memory usage and/or performance.
// See some discussion on the matter here:
// http://google-opensource.blogspot.com/2013/01/c-containers-that-save-memory-and-time.html
// Note, though, that this project is in no way related to the C++ B-Tree
// implementation written about there.
//
// Within this tree, each node contains a slice of items and a (possibly nil)
// slice of children. For basic numeric values or raw structs, this can cause
// efficiency differences when compared to equivalent C++ template code that
// stores values in arrays within the node:
// * Due to the overhead of storing values as interfaces (each
// value needs to be stored as the value itself, then 2 words for the
// interface pointing to that value and its type), resulting in higher
// memory use.
// * Since interfaces can point to values anywhere in memory, values are
// most likely not stored in contiguous blocks, resulting in a higher
// number of cache misses.
// These issues don't tend to matter, though, when working with strings or other
// heap-allocated structures, since C++-equivalent structures also must store
// pointers and also distribute their values across the heap.
//
// This implementation is designed to be a drop-in replacement to gollrb.LLRB
// trees, (http://github.com/petar/gollrb), an excellent and probably the most
// widely used ordered tree implementation in the Go ecosystem currently.
// Its functions, therefore, exactly mirror those of
// llrb.LLRB where possible. Unlike gollrb, though, we currently don't
// support storing multiple equivalent values.
package btree
import (
"fmt"
"io"
"sort"
"strings"
"sync"
)
// Item represents a single object in the tree.
type Item interface {
// Less tests whether the current item is less than the given argument.
//
// This must provide a strict weak ordering.
// If !a.Less(b) && !b.Less(a), we treat this to mean a == b (i.e. we can only
// hold one of either a or b in the tree).
Less(than Item) bool
}
const (
DefaultFreeListSize = 32
)
var (
nilItems = make(items, 16)
nilChildren = make(children, 16)
)
// FreeList represents a free list of btree nodes. By default each
// BTree has its own FreeList, but multiple BTrees can share the same
// FreeList.
// Two Btrees using the same freelist are safe for concurrent write access.
type FreeList struct {
mu sync.Mutex
freelist []*node
}
// NewFreeList creates a new free list.
// size is the maximum size of the returned free list.
func NewFreeList(size int) *FreeList {
return &FreeList{freelist: make([]*node, 0, size)}
}
func (f *FreeList) newNode() (n *node) {
f.mu.Lock()
index := len(f.freelist) - 1
if index < 0 {
f.mu.Unlock()
return new(node)
}
n = f.freelist[index]
f.freelist[index] = nil
f.freelist = f.freelist[:index]
f.mu.Unlock()
return
}
func (f *FreeList) freeNode(n *node) {
f.mu.Lock()
if len(f.freelist) < cap(f.freelist) {
f.freelist = append(f.freelist, n)
}
f.mu.Unlock()
}
// ItemIterator allows callers of Ascend* to iterate in-order over portions of
// the tree. When this function returns false, iteration will stop and the
// associated Ascend* function will immediately return.
type ItemIterator func(i Item) bool
// New creates a new B-Tree with the given degree.
//
// New(2), for example, will create a 2-3-4 tree (each node contains 1-3 items
// and 2-4 children).
func New(degree int) *BTree {
return NewWithFreeList(degree, NewFreeList(DefaultFreeListSize))
}
// NewWithFreeList creates a new B-Tree that uses the given node free list.
func NewWithFreeList(degree int, f *FreeList) *BTree {
if degree <= 1 {
panic("bad degree")
}
return &BTree{
degree: degree,
cow: &copyOnWriteContext{freelist: f},
}
}
// items stores items in a node.
type items []Item
// insertAt inserts a value into the given index, pushing all subsequent values
// forward.
func (s *items) insertAt(index int, item Item) {
*s = append(*s, nil)
if index < len(*s) {
copy((*s)[index+1:], (*s)[index:])
}
(*s)[index] = item
}
// removeAt removes a value at a given index, pulling all subsequent values
// back.
func (s *items) removeAt(index int) Item {
item := (*s)[index]
copy((*s)[index:], (*s)[index+1:])
(*s)[len(*s)-1] = nil
*s = (*s)[:len(*s)-1]
return item
}
// pop removes and returns the last element in the list.
func (s *items) pop() (out Item) {
index := len(*s) - 1
out = (*s)[index]
(*s)[index] = nil
*s = (*s)[:index]
return
}
// truncate truncates this instance at index so that it contains only the
// first index items. index must be less than or equal to length.
func (s *items) truncate(index int) {
var toClear items
*s, toClear = (*s)[:index], (*s)[index:]
for len(toClear) > 0 {
toClear = toClear[copy(toClear, nilItems):]
}
}
// find returns the index where the given item should be inserted into this
// list. 'found' is true if the item already exists in the list at the given
// index.
func (s items) find(item Item) (index int, found bool) {
i := sort.Search(len(s), func(i int) bool {
return item.Less(s[i])
})
if i > 0 && !s[i-1].Less(item) {
return i - 1, true
}
return i, false
}
// children stores child nodes in a node.
type children []*node
// insertAt inserts a value into the given index, pushing all subsequent values
// forward.
func (s *children) insertAt(index int, n *node) {
*s = append(*s, nil)
if index < len(*s) {
copy((*s)[index+1:], (*s)[index:])
}
(*s)[index] = n
}
// removeAt removes a value at a given index, pulling all subsequent values
// back.
func (s *children) removeAt(index int) *node {
n := (*s)[index]
copy((*s)[index:], (*s)[index+1:])
(*s)[len(*s)-1] = nil
*s = (*s)[:len(*s)-1]
return n
}
// pop removes and returns the last element in the list.
func (s *children) pop() (out *node) {
index := len(*s) - 1
out = (*s)[index]
(*s)[index] = nil
*s = (*s)[:index]
return
}
// truncate truncates this instance at index so that it contains only the
// first index children. index must be less than or equal to length.
func (s *children) truncate(index int) {
var toClear children
*s, toClear = (*s)[:index], (*s)[index:]
for len(toClear) > 0 {
toClear = toClear[copy(toClear, nilChildren):]
}
}
// node is an internal node in a tree.
//
// It must at all times maintain the invariant that either
// * len(children) == 0, len(items) unconstrained
// * len(children) == len(items) + 1
type node struct {
items items
children children
cow *copyOnWriteContext
}
func (n *node) mutableFor(cow *copyOnWriteContext) *node {
if n.cow == cow {
return n
}
out := cow.newNode()
if cap(out.items) >= len(n.items) {
out.items = out.items[:len(n.items)]
} else {
out.items = make(items, len(n.items), cap(n.items))
}
copy(out.items, n.items)
// Copy children
if cap(out.children) >= len(n.children) {
out.children = out.children[:len(n.children)]
} else {
out.children = make(children, len(n.children), cap(n.children))
}
copy(out.children, n.children)
return out
}
func (n *node) mutableChild(i int) *node {
c := n.children[i].mutableFor(n.cow)
n.children[i] = c
return c
}
// split splits the given node at the given index. The current node shrinks,
// and this function returns the item that existed at that index and a new node
// containing all items/children after it.
func (n *node) split(i int) (Item, *node) {
item := n.items[i]
next := n.cow.newNode()
next.items = append(next.items, n.items[i+1:]...)
n.items.truncate(i)
if len(n.children) > 0 {
next.children = append(next.children, n.children[i+1:]...)
n.children.truncate(i + 1)
}
return item, next
}
// maybeSplitChild checks if a child should be split, and if so splits it.
// Returns whether or not a split occurred.
func (n *node) maybeSplitChild(i, maxItems int) bool {
if len(n.children[i].items) < maxItems {
return false
}
first := n.mutableChild(i)
item, second := first.split(maxItems / 2)
n.items.insertAt(i, item)
n.children.insertAt(i+1, second)
return true
}
// insert inserts an item into the subtree rooted at this node, making sure
// no nodes in the subtree exceed maxItems items. Should an equivalent item be
// be found/replaced by insert, it will be returned.
func (n *node) insert(item Item, maxItems int) Item {
i, found := n.items.find(item)
if found {
out := n.items[i]
n.items[i] = item
return out
}
if len(n.children) == 0 {
n.items.insertAt(i, item)
return nil
}
if n.maybeSplitChild(i, maxItems) {
inTree := n.items[i]
switch {
case item.Less(inTree):
// no change, we want first split node
case inTree.Less(item):
i++ // we want second split node
default:
out := n.items[i]
n.items[i] = item
return out
}
}
return n.mutableChild(i).insert(item, maxItems)
}
// get finds the given key in the subtree and returns it.
func (n *node) get(key Item) Item {
i, found := n.items.find(key)
if found {
return n.items[i]
} else if len(n.children) > 0 {
return n.children[i].get(key)
}
return nil
}
// min returns the first item in the subtree.
func min(n *node) Item {
if n == nil {
return nil
}
for len(n.children) > 0 {
n = n.children[0]
}
if len(n.items) == 0 {
return nil
}
return n.items[0]
}
// max returns the last item in the subtree.
func max(n *node) Item {
if n == nil {
return nil
}
for len(n.children) > 0 {
n = n.children[len(n.children)-1]
}
if len(n.items) == 0 {
return nil
}
return n.items[len(n.items)-1]
}
// toRemove details what item to remove in a node.remove call.
type toRemove int
const (
removeItem toRemove = iota // removes the given item
removeMin // removes smallest item in the subtree
removeMax // removes largest item in the subtree
)
// remove removes an item from the subtree rooted at this node.
func (n *node) remove(item Item, minItems int, typ toRemove) Item {
var i int
var found bool
switch typ {
case removeMax:
if len(n.children) == 0 {
return n.items.pop()
}
i = len(n.items)
case removeMin:
if len(n.children) == 0 {
return n.items.removeAt(0)
}
i = 0
case removeItem:
i, found = n.items.find(item)
if len(n.children) == 0 {
if found {
return n.items.removeAt(i)
}
return nil
}
default:
panic("invalid type")
}
// If we get to here, we have children.
if len(n.children[i].items) <= minItems {
return n.growChildAndRemove(i, item, minItems, typ)
}
child := n.mutableChild(i)
// Either we had enough items to begin with, or we've done some
// merging/stealing, because we've got enough now and we're ready to return
// stuff.
if found {
// The item exists at index 'i', and the child we've selected can give us a
// predecessor, since if we've gotten here it's got > minItems items in it.
out := n.items[i]
// We use our special-case 'remove' call with typ=maxItem to pull the
// predecessor of item i (the rightmost leaf of our immediate left child)
// and set it into where we pulled the item from.
n.items[i] = child.remove(nil, minItems, removeMax)
return out
}
// Final recursive call. Once we're here, we know that the item isn't in this
// node and that the child is big enough to remove from.
return child.remove(item, minItems, typ)
}
// growChildAndRemove grows child 'i' to make sure it's possible to remove an
// item from it while keeping it at minItems, then calls remove to actually
// remove it.
//
// Most documentation says we have to do two sets of special casing:
// 1) item is in this node
// 2) item is in child
// In both cases, we need to handle the two subcases:
// A) node has enough values that it can spare one
// B) node doesn't have enough values
// For the latter, we have to check:
// a) left sibling has node to spare
// b) right sibling has node to spare
// c) we must merge
// To simplify our code here, we handle cases #1 and #2 the same:
// If a node doesn't have enough items, we make sure it does (using a,b,c).
// We then simply redo our remove call, and the second time (regardless of
// whether we're in case 1 or 2), we'll have enough items and can guarantee
// that we hit case A.
func (n *node) growChildAndRemove(i int, item Item, minItems int, typ toRemove) Item {
if i > 0 && len(n.children[i-1].items) > minItems {
// Steal from left child
child := n.mutableChild(i)
stealFrom := n.mutableChild(i - 1)
stolenItem := stealFrom.items.pop()
child.items.insertAt(0, n.items[i-1])
n.items[i-1] = stolenItem
if len(stealFrom.children) > 0 {
child.children.insertAt(0, stealFrom.children.pop())
}
} else if i < len(n.items) && len(n.children[i+1].items) > minItems {
// steal from right child
child := n.mutableChild(i)
stealFrom := n.mutableChild(i + 1)
stolenItem := stealFrom.items.removeAt(0)
child.items = append(child.items, n.items[i])
n.items[i] = stolenItem
if len(stealFrom.children) > 0 {
child.children = append(child.children, stealFrom.children.removeAt(0))
}
} else {
if i >= len(n.items) {
i--
}
child := n.mutableChild(i)
// merge with right child
mergeItem := n.items.removeAt(i)
mergeChild := n.children.removeAt(i + 1)
child.items = append(child.items, mergeItem)
child.items = append(child.items, mergeChild.items...)
child.children = append(child.children, mergeChild.children...)
n.cow.freeNode(mergeChild)
}
return n.remove(item, minItems, typ)
}
type direction int
const (
descend = direction(-1)
ascend = direction(+1)
)
// iterate provides a simple method for iterating over elements in the tree.
//
// When ascending, the 'start' should be less than 'stop' and when descending,
// the 'start' should be greater than 'stop'. Setting 'includeStart' to true
// will force the iterator to include the first item when it equals 'start',
// thus creating a "greaterOrEqual" or "lessThanEqual" rather than just a
// "greaterThan" or "lessThan" queries.
func (n *node) iterate(dir direction, start, stop Item, includeStart bool, hit bool, iter ItemIterator) (bool, bool) {
var ok bool
switch dir {
case ascend:
for i := 0; i < len(n.items); i++ {
if start != nil && n.items[i].Less(start) {
continue
}
if len(n.children) > 0 {
if hit, ok = n.children[i].iterate(dir, start, stop, includeStart, hit, iter); !ok {
return hit, false
}
}
if !includeStart && !hit && start != nil && !start.Less(n.items[i]) {
hit = true
continue
}
hit = true
if stop != nil && !n.items[i].Less(stop) {
return hit, false
}
if !iter(n.items[i]) {
return hit, false
}
}
if len(n.children) > 0 {
if hit, ok = n.children[len(n.children)-1].iterate(dir, start, stop, includeStart, hit, iter); !ok {
return hit, false
}
}
case descend:
for i := len(n.items) - 1; i >= 0; i-- {
if start != nil && !n.items[i].Less(start) {
if !includeStart || hit || start.Less(n.items[i]) {
continue
}
}
if len(n.children) > 0 {
if hit, ok = n.children[i+1].iterate(dir, start, stop, includeStart, hit, iter); !ok {
return hit, false
}
}
if stop != nil && !stop.Less(n.items[i]) {
return hit, false // continue
}
hit = true
if !iter(n.items[i]) {
return hit, false
}
}
if len(n.children) > 0 {
if hit, ok = n.children[0].iterate(dir, start, stop, includeStart, hit, iter); !ok {
return hit, false
}
}
}
return hit, true
}
// Used for testing/debugging purposes.
func (n *node) print(w io.Writer, level int) {
fmt.Fprintf(w, "%sNODE:%v\n", strings.Repeat(" ", level), n.items)
for _, c := range n.children {
c.print(w, level+1)
}
}
// BTree is an implementation of a B-Tree.
//
// BTree stores Item instances in an ordered structure, allowing easy insertion,
// removal, and iteration.
//
// Write operations are not safe for concurrent mutation by multiple
// goroutines, but Read operations are.
type BTree struct {
degree int
length int
root *node
cow *copyOnWriteContext
}
// copyOnWriteContext pointers determine node ownership... a tree with a write
// context equivalent to a node's write context is allowed to modify that node.
// A tree whose write context does not match a node's is not allowed to modify
// it, and must create a new, writable copy (IE: it's a Clone).
//
// When doing any write operation, we maintain the invariant that the current
// node's context is equal to the context of the tree that requested the write.
// We do this by, before we descend into any node, creating a copy with the
// correct context if the contexts don't match.
//
// Since the node we're currently visiting on any write has the requesting
// tree's context, that node is modifiable in place. Children of that node may
// not share context, but before we descend into them, we'll make a mutable
// copy.
type copyOnWriteContext struct {
freelist *FreeList
}
// Clone clones the btree, lazily. Clone should not be called concurrently,
// but the original tree (t) and the new tree (t2) can be used concurrently
// once the Clone call completes.
//
// The internal tree structure of b is marked read-only and shared between t and
// t2. Writes to both t and t2 use copy-on-write logic, creating new nodes
// whenever one of b's original nodes would have been modified. Read operations
// should have no performance degredation. Write operations for both t and t2
// will initially experience minor slow-downs caused by additional allocs and
// copies due to the aforementioned copy-on-write logic, but should converge to
// the original performance characteristics of the original tree.
func (t *BTree) Clone() (t2 *BTree) {
// Create two entirely new copy-on-write contexts.
// This operation effectively creates three trees:
// the original, shared nodes (old b.cow)
// the new b.cow nodes
// the new out.cow nodes
cow1, cow2 := *t.cow, *t.cow
out := *t
t.cow = &cow1
out.cow = &cow2
return &out
}
// maxItems returns the max number of items to allow per node.
func (t *BTree) maxItems() int {
return t.degree*2 - 1
}
// minItems returns the min number of items to allow per node (ignored for the
// root node).
func (t *BTree) minItems() int {
return t.degree - 1
}
func (c *copyOnWriteContext) newNode() (n *node) {
n = c.freelist.newNode()
n.cow = c
return
}
func (c *copyOnWriteContext) freeNode(n *node) {
if n.cow == c {
// clear to allow GC
n.items.truncate(0)
n.children.truncate(0)
n.cow = nil
c.freelist.freeNode(n)
}
}
// ReplaceOrInsert adds the given item to the tree. If an item in the tree
// already equals the given one, it is removed from the tree and returned.
// Otherwise, nil is returned.
//
// nil cannot be added to the tree (will panic).
func (t *BTree) ReplaceOrInsert(item Item) Item {
if item == nil {
panic("nil item being added to BTree")
}
if t.root == nil {
t.root = t.cow.newNode()
t.root.items = append(t.root.items, item)
t.length++
return nil
} else {
t.root = t.root.mutableFor(t.cow)
if len(t.root.items) >= t.maxItems() {
item2, second := t.root.split(t.maxItems() / 2)
oldroot := t.root
t.root = t.cow.newNode()
t.root.items = append(t.root.items, item2)
t.root.children = append(t.root.children, oldroot, second)
}
}
out := t.root.insert(item, t.maxItems())
if out == nil {
t.length++
}
return out
}
// Delete removes an item equal to the passed in item from the tree, returning
// it. If no such item exists, returns nil.
func (t *BTree) Delete(item Item) Item {
return t.deleteItem(item, removeItem)
}
// DeleteMin removes the smallest item in the tree and returns it.
// If no such item exists, returns nil.
func (t *BTree) DeleteMin() Item {
return t.deleteItem(nil, removeMin)
}
// DeleteMax removes the largest item in the tree and returns it.
// If no such item exists, returns nil.
func (t *BTree) DeleteMax() Item {
return t.deleteItem(nil, removeMax)
}
func (t *BTree) deleteItem(item Item, typ toRemove) Item {
if t.root == nil || len(t.root.items) == 0 {
return nil
}
t.root = t.root.mutableFor(t.cow)
out := t.root.remove(item, t.minItems(), typ)
if len(t.root.items) == 0 && len(t.root.children) > 0 {
oldroot := t.root
t.root = t.root.children[0]
t.cow.freeNode(oldroot)
}
if out != nil {
t.length--
}
return out
}
// AscendRange calls the iterator for every value in the tree within the range
// [greaterOrEqual, lessThan), until iterator returns false.
func (t *BTree) AscendRange(greaterOrEqual, lessThan Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(ascend, greaterOrEqual, lessThan, true, false, iterator)
}
// AscendLessThan calls the iterator for every value in the tree within the range
// [first, pivot), until iterator returns false.
func (t *BTree) AscendLessThan(pivot Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(ascend, nil, pivot, false, false, iterator)
}
// AscendGreaterOrEqual calls the iterator for every value in the tree within
// the range [pivot, last], until iterator returns false.
func (t *BTree) AscendGreaterOrEqual(pivot Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(ascend, pivot, nil, true, false, iterator)
}
// Ascend calls the iterator for every value in the tree within the range
// [first, last], until iterator returns false.
func (t *BTree) Ascend(iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(ascend, nil, nil, false, false, iterator)
}
// DescendRange calls the iterator for every value in the tree within the range
// [lessOrEqual, greaterThan), until iterator returns false.
func (t *BTree) DescendRange(lessOrEqual, greaterThan Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(descend, lessOrEqual, greaterThan, true, false, iterator)
}
// DescendLessOrEqual calls the iterator for every value in the tree within the range
// [pivot, first], until iterator returns false.
func (t *BTree) DescendLessOrEqual(pivot Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(descend, pivot, nil, true, false, iterator)
}
// DescendGreaterThan calls the iterator for every value in the tree within
// the range (pivot, last], until iterator returns false.
func (t *BTree) DescendGreaterThan(pivot Item, iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(descend, nil, pivot, false, false, iterator)
}
// Descend calls the iterator for every value in the tree within the range
// [last, first], until iterator returns false.
func (t *BTree) Descend(iterator ItemIterator) {
if t.root == nil {
return
}
t.root.iterate(descend, nil, nil, false, false, iterator)
}
// Get looks for the key item in the tree, returning it. It returns nil if
// unable to find that item.
func (t *BTree) Get(key Item) Item {
if t.root == nil {
return nil
}
return t.root.get(key)
}
// Min returns the smallest item in the tree, or nil if the tree is empty.
func (t *BTree) Min() Item {
return min(t.root)
}
// Max returns the largest item in the tree, or nil if the tree is empty.
func (t *BTree) Max() Item {
return max(t.root)
}
// Has returns true if the given key is in the tree.
func (t *BTree) Has(key Item) bool {
return t.Get(key) != nil
}
// Len returns the number of items currently in the tree.
func (t *BTree) Len() int {
return t.length
}
// Int implements the Item interface for integers.
type Int int
// Less returns true if int(a) < int(b).
func (a Int) Less(b Item) bool {
return a < b.(Int)
}

76
vendor/github.com/google/btree/btree_mem.go generated vendored Normal file
View File

@@ -0,0 +1,76 @@
// Copyright 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// +build ignore
// This binary compares memory usage between btree and gollrb.
package main
import (
"flag"
"fmt"
"math/rand"
"runtime"
"time"
"github.com/google/btree"
"github.com/petar/GoLLRB/llrb"
)
var (
size = flag.Int("size", 1000000, "size of the tree to build")
degree = flag.Int("degree", 8, "degree of btree")
gollrb = flag.Bool("llrb", false, "use llrb instead of btree")
)
func main() {
flag.Parse()
vals := rand.Perm(*size)
var t, v interface{}
v = vals
var stats runtime.MemStats
for i := 0; i < 10; i++ {
runtime.GC()
}
fmt.Println("-------- BEFORE ----------")
runtime.ReadMemStats(&stats)
fmt.Printf("%+v\n", stats)
start := time.Now()
if *gollrb {
tr := llrb.New()
for _, v := range vals {
tr.ReplaceOrInsert(llrb.Int(v))
}
t = tr // keep it around
} else {
tr := btree.New(*degree)
for _, v := range vals {
tr.ReplaceOrInsert(btree.Int(v))
}
t = tr // keep it around
}
fmt.Printf("%v inserts in %v\n", *size, time.Since(start))
fmt.Println("-------- AFTER ----------")
runtime.ReadMemStats(&stats)
fmt.Printf("%+v\n", stats)
for i := 0; i < 10; i++ {
runtime.GC()
}
fmt.Println("-------- AFTER GC ----------")
runtime.ReadMemStats(&stats)
fmt.Printf("%+v\n", stats)
if t == v {
fmt.Println("to make sure vals and tree aren't GC'd")
}
}

689
vendor/github.com/google/btree/btree_test.go generated vendored Normal file
View File

@@ -0,0 +1,689 @@
// Copyright 2014 Google Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package btree
import (
"flag"
"fmt"
"math/rand"
"reflect"
"sort"
"sync"
"testing"
"time"
)
func init() {
seed := time.Now().Unix()
fmt.Println(seed)
rand.Seed(seed)
}
// perm returns a random permutation of n Int items in the range [0, n).
func perm(n int) (out []Item) {
for _, v := range rand.Perm(n) {
out = append(out, Int(v))
}
return
}
// rang returns an ordered list of Int items in the range [0, n).
func rang(n int) (out []Item) {
for i := 0; i < n; i++ {
out = append(out, Int(i))
}
return
}
// all extracts all items from a tree in order as a slice.
func all(t *BTree) (out []Item) {
t.Ascend(func(a Item) bool {
out = append(out, a)
return true
})
return
}
// rangerev returns a reversed ordered list of Int items in the range [0, n).
func rangrev(n int) (out []Item) {
for i := n - 1; i >= 0; i-- {
out = append(out, Int(i))
}
return
}
// allrev extracts all items from a tree in reverse order as a slice.
func allrev(t *BTree) (out []Item) {
t.Descend(func(a Item) bool {
out = append(out, a)
return true
})
return
}
var btreeDegree = flag.Int("degree", 32, "B-Tree degree")
func TestBTree(t *testing.T) {
tr := New(*btreeDegree)
const treeSize = 10000
for i := 0; i < 10; i++ {
if min := tr.Min(); min != nil {
t.Fatalf("empty min, got %+v", min)
}
if max := tr.Max(); max != nil {
t.Fatalf("empty max, got %+v", max)
}
for _, item := range perm(treeSize) {
if x := tr.ReplaceOrInsert(item); x != nil {
t.Fatal("insert found item", item)
}
}
for _, item := range perm(treeSize) {
if x := tr.ReplaceOrInsert(item); x == nil {
t.Fatal("insert didn't find item", item)
}
}
if min, want := tr.Min(), Item(Int(0)); min != want {
t.Fatalf("min: want %+v, got %+v", want, min)
}
if max, want := tr.Max(), Item(Int(treeSize-1)); max != want {
t.Fatalf("max: want %+v, got %+v", want, max)
}
got := all(tr)
want := rang(treeSize)
if !reflect.DeepEqual(got, want) {
t.Fatalf("mismatch:\n got: %v\nwant: %v", got, want)
}
gotrev := allrev(tr)
wantrev := rangrev(treeSize)
if !reflect.DeepEqual(gotrev, wantrev) {
t.Fatalf("mismatch:\n got: %v\nwant: %v", got, want)
}
for _, item := range perm(treeSize) {
if x := tr.Delete(item); x == nil {
t.Fatalf("didn't find %v", item)
}
}
if got = all(tr); len(got) > 0 {
t.Fatalf("some left!: %v", got)
}
}
}
func ExampleBTree() {
tr := New(*btreeDegree)
for i := Int(0); i < 10; i++ {
tr.ReplaceOrInsert(i)
}
fmt.Println("len: ", tr.Len())
fmt.Println("get3: ", tr.Get(Int(3)))
fmt.Println("get100: ", tr.Get(Int(100)))
fmt.Println("del4: ", tr.Delete(Int(4)))
fmt.Println("del100: ", tr.Delete(Int(100)))
fmt.Println("replace5: ", tr.ReplaceOrInsert(Int(5)))
fmt.Println("replace100:", tr.ReplaceOrInsert(Int(100)))
fmt.Println("min: ", tr.Min())
fmt.Println("delmin: ", tr.DeleteMin())
fmt.Println("max: ", tr.Max())
fmt.Println("delmax: ", tr.DeleteMax())
fmt.Println("len: ", tr.Len())
// Output:
// len: 10
// get3: 3
// get100: <nil>
// del4: 4
// del100: <nil>
// replace5: 5
// replace100: <nil>
// min: 0
// delmin: 0
// max: 100
// delmax: 100
// len: 8
}
func TestDeleteMin(t *testing.T) {
tr := New(3)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
for v := tr.DeleteMin(); v != nil; v = tr.DeleteMin() {
got = append(got, v)
}
if want := rang(100); !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestDeleteMax(t *testing.T) {
tr := New(3)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
for v := tr.DeleteMax(); v != nil; v = tr.DeleteMax() {
got = append(got, v)
}
// Reverse our list.
for i := 0; i < len(got)/2; i++ {
got[i], got[len(got)-i-1] = got[len(got)-i-1], got[i]
}
if want := rang(100); !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestAscendRange(t *testing.T) {
tr := New(2)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.AscendRange(Int(40), Int(60), func(a Item) bool {
got = append(got, a)
return true
})
if want := rang(100)[40:60]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.AscendRange(Int(40), Int(60), func(a Item) bool {
if a.(Int) > 50 {
return false
}
got = append(got, a)
return true
})
if want := rang(100)[40:51]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestDescendRange(t *testing.T) {
tr := New(2)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.DescendRange(Int(60), Int(40), func(a Item) bool {
got = append(got, a)
return true
})
if want := rangrev(100)[39:59]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendrange:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.DescendRange(Int(60), Int(40), func(a Item) bool {
if a.(Int) < 50 {
return false
}
got = append(got, a)
return true
})
if want := rangrev(100)[39:50]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestAscendLessThan(t *testing.T) {
tr := New(*btreeDegree)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.AscendLessThan(Int(60), func(a Item) bool {
got = append(got, a)
return true
})
if want := rang(100)[:60]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.AscendLessThan(Int(60), func(a Item) bool {
if a.(Int) > 50 {
return false
}
got = append(got, a)
return true
})
if want := rang(100)[:51]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestDescendLessOrEqual(t *testing.T) {
tr := New(*btreeDegree)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.DescendLessOrEqual(Int(40), func(a Item) bool {
got = append(got, a)
return true
})
if want := rangrev(100)[59:]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendlessorequal:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.DescendLessOrEqual(Int(60), func(a Item) bool {
if a.(Int) < 50 {
return false
}
got = append(got, a)
return true
})
if want := rangrev(100)[39:50]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendlessorequal:\n got: %v\nwant: %v", got, want)
}
}
func TestAscendGreaterOrEqual(t *testing.T) {
tr := New(*btreeDegree)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.AscendGreaterOrEqual(Int(40), func(a Item) bool {
got = append(got, a)
return true
})
if want := rang(100)[40:]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.AscendGreaterOrEqual(Int(40), func(a Item) bool {
if a.(Int) > 50 {
return false
}
got = append(got, a)
return true
})
if want := rang(100)[40:51]; !reflect.DeepEqual(got, want) {
t.Fatalf("ascendrange:\n got: %v\nwant: %v", got, want)
}
}
func TestDescendGreaterThan(t *testing.T) {
tr := New(*btreeDegree)
for _, v := range perm(100) {
tr.ReplaceOrInsert(v)
}
var got []Item
tr.DescendGreaterThan(Int(40), func(a Item) bool {
got = append(got, a)
return true
})
if want := rangrev(100)[:59]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendgreaterthan:\n got: %v\nwant: %v", got, want)
}
got = got[:0]
tr.DescendGreaterThan(Int(40), func(a Item) bool {
if a.(Int) < 50 {
return false
}
got = append(got, a)
return true
})
if want := rangrev(100)[:50]; !reflect.DeepEqual(got, want) {
t.Fatalf("descendgreaterthan:\n got: %v\nwant: %v", got, want)
}
}
const benchmarkTreeSize = 10000
func BenchmarkInsert(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
b.StartTimer()
i := 0
for i < b.N {
tr := New(*btreeDegree)
for _, item := range insertP {
tr.ReplaceOrInsert(item)
i++
if i >= b.N {
return
}
}
}
}
func BenchmarkDeleteInsert(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, item := range insertP {
tr.ReplaceOrInsert(item)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
tr.Delete(insertP[i%benchmarkTreeSize])
tr.ReplaceOrInsert(insertP[i%benchmarkTreeSize])
}
}
func BenchmarkDeleteInsertCloneOnce(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, item := range insertP {
tr.ReplaceOrInsert(item)
}
tr = tr.Clone()
b.StartTimer()
for i := 0; i < b.N; i++ {
tr.Delete(insertP[i%benchmarkTreeSize])
tr.ReplaceOrInsert(insertP[i%benchmarkTreeSize])
}
}
func BenchmarkDeleteInsertCloneEachTime(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, item := range insertP {
tr.ReplaceOrInsert(item)
}
b.StartTimer()
for i := 0; i < b.N; i++ {
tr = tr.Clone()
tr.Delete(insertP[i%benchmarkTreeSize])
tr.ReplaceOrInsert(insertP[i%benchmarkTreeSize])
}
}
func BenchmarkDelete(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
removeP := perm(benchmarkTreeSize)
b.StartTimer()
i := 0
for i < b.N {
b.StopTimer()
tr := New(*btreeDegree)
for _, v := range insertP {
tr.ReplaceOrInsert(v)
}
b.StartTimer()
for _, item := range removeP {
tr.Delete(item)
i++
if i >= b.N {
return
}
}
if tr.Len() > 0 {
panic(tr.Len())
}
}
}
func BenchmarkGet(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
removeP := perm(benchmarkTreeSize)
b.StartTimer()
i := 0
for i < b.N {
b.StopTimer()
tr := New(*btreeDegree)
for _, v := range insertP {
tr.ReplaceOrInsert(v)
}
b.StartTimer()
for _, item := range removeP {
tr.Get(item)
i++
if i >= b.N {
return
}
}
}
}
func BenchmarkGetCloneEachTime(b *testing.B) {
b.StopTimer()
insertP := perm(benchmarkTreeSize)
removeP := perm(benchmarkTreeSize)
b.StartTimer()
i := 0
for i < b.N {
b.StopTimer()
tr := New(*btreeDegree)
for _, v := range insertP {
tr.ReplaceOrInsert(v)
}
b.StartTimer()
for _, item := range removeP {
tr = tr.Clone()
tr.Get(item)
i++
if i >= b.N {
return
}
}
}
}
type byInts []Item
func (a byInts) Len() int {
return len(a)
}
func (a byInts) Less(i, j int) bool {
return a[i].(Int) < a[j].(Int)
}
func (a byInts) Swap(i, j int) {
a[i], a[j] = a[j], a[i]
}
func BenchmarkAscend(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := 0
tr.Ascend(func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j++
return true
})
}
}
func BenchmarkDescend(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := len(arr) - 1
tr.Descend(func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j--
return true
})
}
}
func BenchmarkAscendRange(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := 100
tr.AscendRange(Int(100), arr[len(arr)-100], func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j++
return true
})
if j != len(arr)-100 {
b.Fatalf("expected: %v, got %v", len(arr)-100, j)
}
}
}
func BenchmarkDescendRange(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := len(arr) - 100
tr.DescendRange(arr[len(arr)-100], Int(100), func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j--
return true
})
if j != 100 {
b.Fatalf("expected: %v, got %v", len(arr)-100, j)
}
}
}
func BenchmarkAscendGreaterOrEqual(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := 100
k := 0
tr.AscendGreaterOrEqual(Int(100), func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j++
k++
return true
})
if j != len(arr) {
b.Fatalf("expected: %v, got %v", len(arr), j)
}
if k != len(arr)-100 {
b.Fatalf("expected: %v, got %v", len(arr)-100, k)
}
}
}
func BenchmarkDescendLessOrEqual(b *testing.B) {
arr := perm(benchmarkTreeSize)
tr := New(*btreeDegree)
for _, v := range arr {
tr.ReplaceOrInsert(v)
}
sort.Sort(byInts(arr))
b.ResetTimer()
for i := 0; i < b.N; i++ {
j := len(arr) - 100
k := len(arr)
tr.DescendLessOrEqual(arr[len(arr)-100], func(item Item) bool {
if item.(Int) != arr[j].(Int) {
b.Fatalf("mismatch: expected: %v, got %v", arr[j].(Int), item.(Int))
}
j--
k--
return true
})
if j != -1 {
b.Fatalf("expected: %v, got %v", -1, j)
}
if k != 99 {
b.Fatalf("expected: %v, got %v", 99, k)
}
}
}
const cloneTestSize = 10000
func cloneTest(t *testing.T, b *BTree, start int, p []Item, wg *sync.WaitGroup, trees *[]*BTree) {
t.Logf("Starting new clone at %v", start)
*trees = append(*trees, b)
for i := start; i < cloneTestSize; i++ {
b.ReplaceOrInsert(p[i])
if i%(cloneTestSize/5) == 0 {
wg.Add(1)
go cloneTest(t, b.Clone(), i+1, p, wg, trees)
}
}
wg.Done()
}
func TestCloneConcurrentOperations(t *testing.T) {
b := New(*btreeDegree)
trees := []*BTree{}
p := perm(cloneTestSize)
var wg sync.WaitGroup
wg.Add(1)
go cloneTest(t, b, 0, p, &wg, &trees)
wg.Wait()
want := rang(cloneTestSize)
t.Logf("Starting equality checks on %d trees", len(trees))
for i, tree := range trees {
if !reflect.DeepEqual(want, all(tree)) {
t.Errorf("tree %v mismatch", i)
}
}
t.Log("Removing half from first half")
toRemove := rang(cloneTestSize)[cloneTestSize/2:]
for i := 0; i < len(trees)/2; i++ {
tree := trees[i]
wg.Add(1)
go func() {
for _, item := range toRemove {
tree.Delete(item)
}
wg.Done()
}()
}
wg.Wait()
t.Log("Checking all values again")
for i, tree := range trees {
var wantpart []Item
if i < len(trees)/2 {
wantpart = want[:cloneTestSize/2]
} else {
wantpart = want
}
if got := all(tree); !reflect.DeepEqual(wantpart, got) {
t.Errorf("tree %v mismatch, want %v got %v", i, len(want), len(got))
}
}
}

13
vendor/github.com/google/gofuzz/.travis.yml generated vendored Normal file
View File

@@ -0,0 +1,13 @@
language: go
go:
- 1.4
- 1.3
- 1.2
- tip
install:
- if ! go get code.google.com/p/go.tools/cmd/cover; then go get golang.org/x/tools/cmd/cover; fi
script:
- go test -cover

67
vendor/github.com/google/gofuzz/CONTRIBUTING.md generated vendored Normal file
View File

@@ -0,0 +1,67 @@
# How to contribute #
We'd love to accept your patches and contributions to this project. There are
a just a few small guidelines you need to follow.
## Contributor License Agreement ##
Contributions to any Google project must be accompanied by a Contributor
License Agreement. This is not a copyright **assignment**, it simply gives
Google permission to use and redistribute your contributions as part of the
project.
* If you are an individual writing original source code and you're sure you
own the intellectual property, then you'll need to sign an [individual
CLA][].
* If you work for a company that wants to allow you to contribute your work,
then you'll need to sign a [corporate CLA][].
You generally only need to submit a CLA once, so if you've already submitted
one (even if it was for a different project), you probably don't need to do it
again.
[individual CLA]: https://developers.google.com/open-source/cla/individual
[corporate CLA]: https://developers.google.com/open-source/cla/corporate
## Submitting a patch ##
1. It's generally best to start by opening a new issue describing the bug or
feature you're intending to fix. Even if you think it's relatively minor,
it's helpful to know what people are working on. Mention in the initial
issue that you are planning to work on that bug or feature so that it can
be assigned to you.
1. Follow the normal process of [forking][] the project, and setup a new
branch to work in. It's important that each group of changes be done in
separate branches in order to ensure that a pull request only includes the
commits related to that bug or feature.
1. Go makes it very simple to ensure properly formatted code, so always run
`go fmt` on your code before committing it. You should also run
[golint][] over your code. As noted in the [golint readme][], it's not
strictly necessary that your code be completely "lint-free", but this will
help you find common style issues.
1. Any significant changes should almost always be accompanied by tests. The
project already has good test coverage, so look at some of the existing
tests if you're unsure how to go about it. [gocov][] and [gocov-html][]
are invaluable tools for seeing which parts of your code aren't being
exercised by your tests.
1. Do your best to have [well-formed commit messages][] for each change.
This provides consistency throughout the project, and ensures that commit
messages are able to be formatted properly by various git tools.
1. Finally, push the commits to your fork and submit a [pull request][].
[forking]: https://help.github.com/articles/fork-a-repo
[golint]: https://github.com/golang/lint
[golint readme]: https://github.com/golang/lint/blob/master/README
[gocov]: https://github.com/axw/gocov
[gocov-html]: https://github.com/matm/gocov-html
[well-formed commit messages]: http://tbaggery.com/2008/04/19/a-note-about-git-commit-messages.html
[squash]: http://git-scm.com/book/en/Git-Tools-Rewriting-History#Squashing-Commits
[pull request]: https://help.github.com/articles/creating-a-pull-request

202
vendor/github.com/google/gofuzz/LICENSE generated vendored Normal file
View File

@@ -0,0 +1,202 @@
Apache License
Version 2.0, January 2004
http://www.apache.org/licenses/
TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
1. Definitions.
"License" shall mean the terms and conditions for use, reproduction,
and distribution as defined by Sections 1 through 9 of this document.
"Licensor" shall mean the copyright owner or entity authorized by
the copyright owner that is granting the License.
"Legal Entity" shall mean the union of the acting entity and all
other entities that control, are controlled by, or are under common
control with that entity. For the purposes of this definition,
"control" means (i) the power, direct or indirect, to cause the
direction or management of such entity, whether by contract or
otherwise, or (ii) ownership of fifty percent (50%) or more of the
outstanding shares, or (iii) beneficial ownership of such entity.
"You" (or "Your") shall mean an individual or Legal Entity
exercising permissions granted by this License.
"Source" form shall mean the preferred form for making modifications,
including but not limited to software source code, documentation
source, and configuration files.
"Object" form shall mean any form resulting from mechanical
transformation or translation of a Source form, including but
not limited to compiled object code, generated documentation,
and conversions to other media types.
"Work" shall mean the work of authorship, whether in Source or
Object form, made available under the License, as indicated by a
copyright notice that is included in or attached to the work
(an example is provided in the Appendix below).
"Derivative Works" shall mean any work, whether in Source or Object
form, that is based on (or derived from) the Work and for which the
editorial revisions, annotations, elaborations, or other modifications
represent, as a whole, an original work of authorship. For the purposes
of this License, Derivative Works shall not include works that remain
separable from, or merely link (or bind by name) to the interfaces of,
the Work and Derivative Works thereof.
"Contribution" shall mean any work of authorship, including
the original version of the Work and any modifications or additions
to that Work or Derivative Works thereof, that is intentionally
submitted to Licensor for inclusion in the Work by the copyright owner
or by an individual or Legal Entity authorized to submit on behalf of
the copyright owner. For the purposes of this definition, "submitted"
means any form of electronic, verbal, or written communication sent
to the Licensor or its representatives, including but not limited to
communication on electronic mailing lists, source code control systems,
and issue tracking systems that are managed by, or on behalf of, the
Licensor for the purpose of discussing and improving the Work, but
excluding communication that is conspicuously marked or otherwise
designated in writing by the copyright owner as "Not a Contribution."
"Contributor" shall mean Licensor and any individual or Legal Entity
on behalf of whom a Contribution has been received by Licensor and
subsequently incorporated within the Work.
2. Grant of Copyright License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
copyright license to reproduce, prepare Derivative Works of,
publicly display, publicly perform, sublicense, and distribute the
Work and such Derivative Works in Source or Object form.
3. Grant of Patent License. Subject to the terms and conditions of
this License, each Contributor hereby grants to You a perpetual,
worldwide, non-exclusive, no-charge, royalty-free, irrevocable
(except as stated in this section) patent license to make, have made,
use, offer to sell, sell, import, and otherwise transfer the Work,
where such license applies only to those patent claims licensable
by such Contributor that are necessarily infringed by their
Contribution(s) alone or by combination of their Contribution(s)
with the Work to which such Contribution(s) was submitted. If You
institute patent litigation against any entity (including a
cross-claim or counterclaim in a lawsuit) alleging that the Work
or a Contribution incorporated within the Work constitutes direct
or contributory patent infringement, then any patent licenses
granted to You under this License for that Work shall terminate
as of the date such litigation is filed.
4. Redistribution. You may reproduce and distribute copies of the
Work or Derivative Works thereof in any medium, with or without
modifications, and in Source or Object form, provided that You
meet the following conditions:
(a) You must give any other recipients of the Work or
Derivative Works a copy of this License; and
(b) You must cause any modified files to carry prominent notices
stating that You changed the files; and
(c) You must retain, in the Source form of any Derivative Works
that You distribute, all copyright, patent, trademark, and
attribution notices from the Source form of the Work,
excluding those notices that do not pertain to any part of
the Derivative Works; and
(d) If the Work includes a "NOTICE" text file as part of its
distribution, then any Derivative Works that You distribute must
include a readable copy of the attribution notices contained
within such NOTICE file, excluding those notices that do not
pertain to any part of the Derivative Works, in at least one
of the following places: within a NOTICE text file distributed
as part of the Derivative Works; within the Source form or
documentation, if provided along with the Derivative Works; or,
within a display generated by the Derivative Works, if and
wherever such third-party notices normally appear. The contents
of the NOTICE file are for informational purposes only and
do not modify the License. You may add Your own attribution
notices within Derivative Works that You distribute, alongside
or as an addendum to the NOTICE text from the Work, provided
that such additional attribution notices cannot be construed
as modifying the License.
You may add Your own copyright statement to Your modifications and
may provide additional or different license terms and conditions
for use, reproduction, or distribution of Your modifications, or
for any such Derivative Works as a whole, provided Your use,
reproduction, and distribution of the Work otherwise complies with
the conditions stated in this License.
5. Submission of Contributions. Unless You explicitly state otherwise,
any Contribution intentionally submitted for inclusion in the Work
by You to the Licensor shall be under the terms and conditions of
this License, without any additional terms or conditions.
Notwithstanding the above, nothing herein shall supersede or modify
the terms of any separate license agreement you may have executed
with Licensor regarding such Contributions.
6. Trademarks. This License does not grant permission to use the trade
names, trademarks, service marks, or product names of the Licensor,
except as required for reasonable and customary use in describing the
origin of the Work and reproducing the content of the NOTICE file.
7. Disclaimer of Warranty. Unless required by applicable law or
agreed to in writing, Licensor provides the Work (and each
Contributor provides its Contributions) on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
implied, including, without limitation, any warranties or conditions
of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
PARTICULAR PURPOSE. You are solely responsible for determining the
appropriateness of using or redistributing the Work and assume any
risks associated with Your exercise of permissions under this License.
8. Limitation of Liability. In no event and under no legal theory,
whether in tort (including negligence), contract, or otherwise,
unless required by applicable law (such as deliberate and grossly
negligent acts) or agreed to in writing, shall any Contributor be
liable to You for damages, including any direct, indirect, special,
incidental, or consequential damages of any character arising as a
result of this License or out of the use or inability to use the
Work (including but not limited to damages for loss of goodwill,
work stoppage, computer failure or malfunction, or any and all
other commercial damages or losses), even if such Contributor
has been advised of the possibility of such damages.
9. Accepting Warranty or Additional Liability. While redistributing
the Work or Derivative Works thereof, You may choose to offer,
and charge a fee for, acceptance of support, warranty, indemnity,
or other liability obligations and/or rights consistent with this
License. However, in accepting such obligations, You may act only
on Your own behalf and on Your sole responsibility, not on behalf
of any other Contributor, and only if You agree to indemnify,
defend, and hold each Contributor harmless for any liability
incurred by, or claims asserted against, such Contributor by reason
of your accepting any such warranty or additional liability.
END OF TERMS AND CONDITIONS
APPENDIX: How to apply the Apache License to your work.
To apply the Apache License to your work, attach the following
boilerplate notice, with the fields enclosed by brackets "[]"
replaced with your own identifying information. (Don't include
the brackets!) The text should be enclosed in the appropriate
comment syntax for the file format. We also recommend that a
file or class name and description of purpose be included on the
same "printed page" as the copyright notice for easier
identification within third-party archives.
Copyright [yyyy] [name of copyright owner]
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

71
vendor/github.com/google/gofuzz/README.md generated vendored Normal file
View File

@@ -0,0 +1,71 @@
gofuzz
======
gofuzz is a library for populating go objects with random values.
[![GoDoc](https://godoc.org/github.com/google/gofuzz?status.png)](https://godoc.org/github.com/google/gofuzz)
[![Travis](https://travis-ci.org/google/gofuzz.svg?branch=master)](https://travis-ci.org/google/gofuzz)
This is useful for testing:
* Do your project's objects really serialize/unserialize correctly in all cases?
* Is there an incorrectly formatted object that will cause your project to panic?
Import with ```import "github.com/google/gofuzz"```
You can use it on single variables:
```go
f := fuzz.New()
var myInt int
f.Fuzz(&myInt) // myInt gets a random value.
```
You can use it on maps:
```go
f := fuzz.New().NilChance(0).NumElements(1, 1)
var myMap map[ComplexKeyType]string
f.Fuzz(&myMap) // myMap will have exactly one element.
```
Customize the chance of getting a nil pointer:
```go
f := fuzz.New().NilChance(.5)
var fancyStruct struct {
A, B, C, D *string
}
f.Fuzz(&fancyStruct) // About half the pointers should be set.
```
You can even customize the randomization completely if needed:
```go
type MyEnum string
const (
A MyEnum = "A"
B MyEnum = "B"
)
type MyInfo struct {
Type MyEnum
AInfo *string
BInfo *string
}
f := fuzz.New().NilChance(0).Funcs(
func(e *MyInfo, c fuzz.Continue) {
switch c.Intn(2) {
case 0:
e.Type = A
c.Fuzz(&e.AInfo)
case 1:
e.Type = B
c.Fuzz(&e.BInfo)
}
},
)
var myObject MyInfo
f.Fuzz(&myObject) // Type will correspond to whether A or B info is set.
```
See more examples in ```example_test.go```.
Happy testing!

18
vendor/github.com/google/gofuzz/doc.go generated vendored Normal file
View File

@@ -0,0 +1,18 @@
/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
// Package fuzz is a library for populating go objects with random values.
package fuzz

225
vendor/github.com/google/gofuzz/example_test.go generated vendored Normal file
View File

@@ -0,0 +1,225 @@
/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package fuzz_test
import (
"encoding/json"
"fmt"
"math/rand"
"github.com/google/gofuzz"
)
func ExampleSimple() {
type MyType struct {
A string
B string
C int
D struct {
E float64
}
}
f := fuzz.New()
object := MyType{}
uniqueObjects := map[MyType]int{}
for i := 0; i < 1000; i++ {
f.Fuzz(&object)
uniqueObjects[object]++
}
fmt.Printf("Got %v unique objects.\n", len(uniqueObjects))
// Output:
// Got 1000 unique objects.
}
func ExampleCustom() {
type MyType struct {
A int
B string
}
counter := 0
f := fuzz.New().Funcs(
func(i *int, c fuzz.Continue) {
*i = counter
counter++
},
)
object := MyType{}
uniqueObjects := map[MyType]int{}
for i := 0; i < 100; i++ {
f.Fuzz(&object)
if object.A != i {
fmt.Printf("Unexpected value: %#v\n", object)
}
uniqueObjects[object]++
}
fmt.Printf("Got %v unique objects.\n", len(uniqueObjects))
// Output:
// Got 100 unique objects.
}
func ExampleComplex() {
type OtherType struct {
A string
B string
}
type MyType struct {
Pointer *OtherType
Map map[string]OtherType
PointerMap *map[string]OtherType
Slice []OtherType
SlicePointer []*OtherType
PointerSlicePointer *[]*OtherType
}
f := fuzz.New().RandSource(rand.NewSource(0)).NilChance(0).NumElements(1, 1).Funcs(
func(o *OtherType, c fuzz.Continue) {
o.A = "Foo"
o.B = "Bar"
},
func(op **OtherType, c fuzz.Continue) {
*op = &OtherType{"A", "B"}
},
func(m map[string]OtherType, c fuzz.Continue) {
m["Works Because"] = OtherType{
"Fuzzer",
"Preallocated",
}
},
)
object := MyType{}
f.Fuzz(&object)
bytes, err := json.MarshalIndent(&object, "", " ")
if err != nil {
fmt.Printf("error: %v\n", err)
}
fmt.Printf("%s\n", string(bytes))
// Output:
// {
// "Pointer": {
// "A": "A",
// "B": "B"
// },
// "Map": {
// "Works Because": {
// "A": "Fuzzer",
// "B": "Preallocated"
// }
// },
// "PointerMap": {
// "Works Because": {
// "A": "Fuzzer",
// "B": "Preallocated"
// }
// },
// "Slice": [
// {
// "A": "Foo",
// "B": "Bar"
// }
// ],
// "SlicePointer": [
// {
// "A": "A",
// "B": "B"
// }
// ],
// "PointerSlicePointer": [
// {
// "A": "A",
// "B": "B"
// }
// ]
// }
}
func ExampleMap() {
f := fuzz.New().NilChance(0).NumElements(1, 1)
var myMap map[struct{ A, B, C int }]string
f.Fuzz(&myMap)
fmt.Printf("myMap has %v element(s).\n", len(myMap))
// Output:
// myMap has 1 element(s).
}
func ExampleSingle() {
f := fuzz.New()
var i int
f.Fuzz(&i)
// Technically, we'd expect this to fail one out of 2 billion attempts...
fmt.Printf("(i == 0) == %v", i == 0)
// Output:
// (i == 0) == false
}
func ExampleEnum() {
type MyEnum string
const (
A MyEnum = "A"
B MyEnum = "B"
)
type MyInfo struct {
Type MyEnum
AInfo *string
BInfo *string
}
f := fuzz.New().NilChance(0).Funcs(
func(e *MyInfo, c fuzz.Continue) {
// Note c's embedded Rand allows for direct use.
// We could also use c.RandBool() here.
switch c.Intn(2) {
case 0:
e.Type = A
c.Fuzz(&e.AInfo)
case 1:
e.Type = B
c.Fuzz(&e.BInfo)
}
},
)
for i := 0; i < 100; i++ {
var myObject MyInfo
f.Fuzz(&myObject)
switch myObject.Type {
case A:
if myObject.AInfo == nil {
fmt.Println("AInfo should have been set!")
}
if myObject.BInfo != nil {
fmt.Println("BInfo should NOT have been set!")
}
case B:
if myObject.BInfo == nil {
fmt.Println("BInfo should have been set!")
}
if myObject.AInfo != nil {
fmt.Println("AInfo should NOT have been set!")
}
default:
fmt.Println("Invalid enum value!")
}
}
// Output:
}

487
vendor/github.com/google/gofuzz/fuzz.go generated vendored Normal file
View File

@@ -0,0 +1,487 @@
/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package fuzz
import (
"fmt"
"math/rand"
"reflect"
"time"
)
// fuzzFuncMap is a map from a type to a fuzzFunc that handles that type.
type fuzzFuncMap map[reflect.Type]reflect.Value
// Fuzzer knows how to fill any object with random fields.
type Fuzzer struct {
fuzzFuncs fuzzFuncMap
defaultFuzzFuncs fuzzFuncMap
r *rand.Rand
nilChance float64
minElements int
maxElements int
maxDepth int
}
// New returns a new Fuzzer. Customize your Fuzzer further by calling Funcs,
// RandSource, NilChance, or NumElements in any order.
func New() *Fuzzer {
return NewWithSeed(time.Now().UnixNano())
}
func NewWithSeed(seed int64) *Fuzzer {
f := &Fuzzer{
defaultFuzzFuncs: fuzzFuncMap{
reflect.TypeOf(&time.Time{}): reflect.ValueOf(fuzzTime),
},
fuzzFuncs: fuzzFuncMap{},
r: rand.New(rand.NewSource(seed)),
nilChance: .2,
minElements: 1,
maxElements: 10,
maxDepth: 100,
}
return f
}
// Funcs adds each entry in fuzzFuncs as a custom fuzzing function.
//
// Each entry in fuzzFuncs must be a function taking two parameters.
// The first parameter must be a pointer or map. It is the variable that
// function will fill with random data. The second parameter must be a
// fuzz.Continue, which will provide a source of randomness and a way
// to automatically continue fuzzing smaller pieces of the first parameter.
//
// These functions are called sensibly, e.g., if you wanted custom string
// fuzzing, the function `func(s *string, c fuzz.Continue)` would get
// called and passed the address of strings. Maps and pointers will always
// be made/new'd for you, ignoring the NilChange option. For slices, it
// doesn't make much sense to pre-create them--Fuzzer doesn't know how
// long you want your slice--so take a pointer to a slice, and make it
// yourself. (If you don't want your map/pointer type pre-made, take a
// pointer to it, and make it yourself.) See the examples for a range of
// custom functions.
func (f *Fuzzer) Funcs(fuzzFuncs ...interface{}) *Fuzzer {
for i := range fuzzFuncs {
v := reflect.ValueOf(fuzzFuncs[i])
if v.Kind() != reflect.Func {
panic("Need only funcs!")
}
t := v.Type()
if t.NumIn() != 2 || t.NumOut() != 0 {
panic("Need 2 in and 0 out params!")
}
argT := t.In(0)
switch argT.Kind() {
case reflect.Ptr, reflect.Map:
default:
panic("fuzzFunc must take pointer or map type")
}
if t.In(1) != reflect.TypeOf(Continue{}) {
panic("fuzzFunc's second parameter must be type fuzz.Continue")
}
f.fuzzFuncs[argT] = v
}
return f
}
// RandSource causes f to get values from the given source of randomness.
// Use if you want deterministic fuzzing.
func (f *Fuzzer) RandSource(s rand.Source) *Fuzzer {
f.r = rand.New(s)
return f
}
// NilChance sets the probability of creating a nil pointer, map, or slice to
// 'p'. 'p' should be between 0 (no nils) and 1 (all nils), inclusive.
func (f *Fuzzer) NilChance(p float64) *Fuzzer {
if p < 0 || p > 1 {
panic("p should be between 0 and 1, inclusive.")
}
f.nilChance = p
return f
}
// NumElements sets the minimum and maximum number of elements that will be
// added to a non-nil map or slice.
func (f *Fuzzer) NumElements(atLeast, atMost int) *Fuzzer {
if atLeast > atMost {
panic("atLeast must be <= atMost")
}
if atLeast < 0 {
panic("atLeast must be >= 0")
}
f.minElements = atLeast
f.maxElements = atMost
return f
}
func (f *Fuzzer) genElementCount() int {
if f.minElements == f.maxElements {
return f.minElements
}
return f.minElements + f.r.Intn(f.maxElements-f.minElements+1)
}
func (f *Fuzzer) genShouldFill() bool {
return f.r.Float64() > f.nilChance
}
// MaxDepth sets the maximum number of recursive fuzz calls that will be made
// before stopping. This includes struct members, pointers, and map and slice
// elements.
func (f *Fuzzer) MaxDepth(d int) *Fuzzer {
f.maxDepth = d
return f
}
// Fuzz recursively fills all of obj's fields with something random. First
// this tries to find a custom fuzz function (see Funcs). If there is no
// custom function this tests whether the object implements fuzz.Interface and,
// if so, calls Fuzz on it to fuzz itself. If that fails, this will see if
// there is a default fuzz function provided by this package. If all of that
// fails, this will generate random values for all primitive fields and then
// recurse for all non-primitives.
//
// This is safe for cyclic or tree-like structs, up to a limit. Use the
// MaxDepth method to adjust how deep you need it to recurse.
//
// obj must be a pointer. Only exported (public) fields can be set (thanks,
// golang :/ ) Intended for tests, so will panic on bad input or unimplemented
// fields.
func (f *Fuzzer) Fuzz(obj interface{}) {
v := reflect.ValueOf(obj)
if v.Kind() != reflect.Ptr {
panic("needed ptr!")
}
v = v.Elem()
f.fuzzWithContext(v, 0)
}
// FuzzNoCustom is just like Fuzz, except that any custom fuzz function for
// obj's type will not be called and obj will not be tested for fuzz.Interface
// conformance. This applies only to obj and not other instances of obj's
// type.
// Not safe for cyclic or tree-like structs!
// obj must be a pointer. Only exported (public) fields can be set (thanks, golang :/ )
// Intended for tests, so will panic on bad input or unimplemented fields.
func (f *Fuzzer) FuzzNoCustom(obj interface{}) {
v := reflect.ValueOf(obj)
if v.Kind() != reflect.Ptr {
panic("needed ptr!")
}
v = v.Elem()
f.fuzzWithContext(v, flagNoCustomFuzz)
}
const (
// Do not try to find a custom fuzz function. Does not apply recursively.
flagNoCustomFuzz uint64 = 1 << iota
)
func (f *Fuzzer) fuzzWithContext(v reflect.Value, flags uint64) {
fc := &fuzzerContext{fuzzer: f}
fc.doFuzz(v, flags)
}
// fuzzerContext carries context about a single fuzzing run, which lets Fuzzer
// be thread-safe.
type fuzzerContext struct {
fuzzer *Fuzzer
curDepth int
}
func (fc *fuzzerContext) doFuzz(v reflect.Value, flags uint64) {
if fc.curDepth >= fc.fuzzer.maxDepth {
return
}
fc.curDepth++
defer func() { fc.curDepth-- }()
if !v.CanSet() {
return
}
if flags&flagNoCustomFuzz == 0 {
// Check for both pointer and non-pointer custom functions.
if v.CanAddr() && fc.tryCustom(v.Addr()) {
return
}
if fc.tryCustom(v) {
return
}
}
if fn, ok := fillFuncMap[v.Kind()]; ok {
fn(v, fc.fuzzer.r)
return
}
switch v.Kind() {
case reflect.Map:
if fc.fuzzer.genShouldFill() {
v.Set(reflect.MakeMap(v.Type()))
n := fc.fuzzer.genElementCount()
for i := 0; i < n; i++ {
key := reflect.New(v.Type().Key()).Elem()
fc.doFuzz(key, 0)
val := reflect.New(v.Type().Elem()).Elem()
fc.doFuzz(val, 0)
v.SetMapIndex(key, val)
}
return
}
v.Set(reflect.Zero(v.Type()))
case reflect.Ptr:
if fc.fuzzer.genShouldFill() {
v.Set(reflect.New(v.Type().Elem()))
fc.doFuzz(v.Elem(), 0)
return
}
v.Set(reflect.Zero(v.Type()))
case reflect.Slice:
if fc.fuzzer.genShouldFill() {
n := fc.fuzzer.genElementCount()
v.Set(reflect.MakeSlice(v.Type(), n, n))
for i := 0; i < n; i++ {
fc.doFuzz(v.Index(i), 0)
}
return
}
v.Set(reflect.Zero(v.Type()))
case reflect.Array:
if fc.fuzzer.genShouldFill() {
n := v.Len()
for i := 0; i < n; i++ {
fc.doFuzz(v.Index(i), 0)
}
return
}
v.Set(reflect.Zero(v.Type()))
case reflect.Struct:
for i := 0; i < v.NumField(); i++ {
fc.doFuzz(v.Field(i), 0)
}
case reflect.Chan:
fallthrough
case reflect.Func:
fallthrough
case reflect.Interface:
fallthrough
default:
panic(fmt.Sprintf("Can't handle %#v", v.Interface()))
}
}
// tryCustom searches for custom handlers, and returns true iff it finds a match
// and successfully randomizes v.
func (fc *fuzzerContext) tryCustom(v reflect.Value) bool {
// First: see if we have a fuzz function for it.
doCustom, ok := fc.fuzzer.fuzzFuncs[v.Type()]
if !ok {
// Second: see if it can fuzz itself.
if v.CanInterface() {
intf := v.Interface()
if fuzzable, ok := intf.(Interface); ok {
fuzzable.Fuzz(Continue{fc: fc, Rand: fc.fuzzer.r})
return true
}
}
// Finally: see if there is a default fuzz function.
doCustom, ok = fc.fuzzer.defaultFuzzFuncs[v.Type()]
if !ok {
return false
}
}
switch v.Kind() {
case reflect.Ptr:
if v.IsNil() {
if !v.CanSet() {
return false
}
v.Set(reflect.New(v.Type().Elem()))
}
case reflect.Map:
if v.IsNil() {
if !v.CanSet() {
return false
}
v.Set(reflect.MakeMap(v.Type()))
}
default:
return false
}
doCustom.Call([]reflect.Value{v, reflect.ValueOf(Continue{
fc: fc,
Rand: fc.fuzzer.r,
})})
return true
}
// Interface represents an object that knows how to fuzz itself. Any time we
// find a type that implements this interface we will delegate the act of
// fuzzing itself.
type Interface interface {
Fuzz(c Continue)
}
// Continue can be passed to custom fuzzing functions to allow them to use
// the correct source of randomness and to continue fuzzing their members.
type Continue struct {
fc *fuzzerContext
// For convenience, Continue implements rand.Rand via embedding.
// Use this for generating any randomness if you want your fuzzing
// to be repeatable for a given seed.
*rand.Rand
}
// Fuzz continues fuzzing obj. obj must be a pointer.
func (c Continue) Fuzz(obj interface{}) {
v := reflect.ValueOf(obj)
if v.Kind() != reflect.Ptr {
panic("needed ptr!")
}
v = v.Elem()
c.fc.doFuzz(v, 0)
}
// FuzzNoCustom continues fuzzing obj, except that any custom fuzz function for
// obj's type will not be called and obj will not be tested for fuzz.Interface
// conformance. This applies only to obj and not other instances of obj's
// type.
func (c Continue) FuzzNoCustom(obj interface{}) {
v := reflect.ValueOf(obj)
if v.Kind() != reflect.Ptr {
panic("needed ptr!")
}
v = v.Elem()
c.fc.doFuzz(v, flagNoCustomFuzz)
}
// RandString makes a random string up to 20 characters long. The returned string
// may include a variety of (valid) UTF-8 encodings.
func (c Continue) RandString() string {
return randString(c.Rand)
}
// RandUint64 makes random 64 bit numbers.
// Weirdly, rand doesn't have a function that gives you 64 random bits.
func (c Continue) RandUint64() uint64 {
return randUint64(c.Rand)
}
// RandBool returns true or false randomly.
func (c Continue) RandBool() bool {
return randBool(c.Rand)
}
func fuzzInt(v reflect.Value, r *rand.Rand) {
v.SetInt(int64(randUint64(r)))
}
func fuzzUint(v reflect.Value, r *rand.Rand) {
v.SetUint(randUint64(r))
}
func fuzzTime(t *time.Time, c Continue) {
var sec, nsec int64
// Allow for about 1000 years of random time values, which keeps things
// like JSON parsing reasonably happy.
sec = c.Rand.Int63n(1000 * 365 * 24 * 60 * 60)
c.Fuzz(&nsec)
*t = time.Unix(sec, nsec)
}
var fillFuncMap = map[reflect.Kind]func(reflect.Value, *rand.Rand){
reflect.Bool: func(v reflect.Value, r *rand.Rand) {
v.SetBool(randBool(r))
},
reflect.Int: fuzzInt,
reflect.Int8: fuzzInt,
reflect.Int16: fuzzInt,
reflect.Int32: fuzzInt,
reflect.Int64: fuzzInt,
reflect.Uint: fuzzUint,
reflect.Uint8: fuzzUint,
reflect.Uint16: fuzzUint,
reflect.Uint32: fuzzUint,
reflect.Uint64: fuzzUint,
reflect.Uintptr: fuzzUint,
reflect.Float32: func(v reflect.Value, r *rand.Rand) {
v.SetFloat(float64(r.Float32()))
},
reflect.Float64: func(v reflect.Value, r *rand.Rand) {
v.SetFloat(r.Float64())
},
reflect.Complex64: func(v reflect.Value, r *rand.Rand) {
panic("unimplemented")
},
reflect.Complex128: func(v reflect.Value, r *rand.Rand) {
panic("unimplemented")
},
reflect.String: func(v reflect.Value, r *rand.Rand) {
v.SetString(randString(r))
},
reflect.UnsafePointer: func(v reflect.Value, r *rand.Rand) {
panic("unimplemented")
},
}
// randBool returns true or false randomly.
func randBool(r *rand.Rand) bool {
if r.Int()&1 == 1 {
return true
}
return false
}
type charRange struct {
first, last rune
}
// choose returns a random unicode character from the given range, using the
// given randomness source.
func (r *charRange) choose(rand *rand.Rand) rune {
count := int64(r.last - r.first)
return r.first + rune(rand.Int63n(count))
}
var unicodeRanges = []charRange{
{' ', '~'}, // ASCII characters
{'\u00a0', '\u02af'}, // Multi-byte encoded characters
{'\u4e00', '\u9fff'}, // Common CJK (even longer encodings)
}
// randString makes a random string up to 20 characters long. The returned string
// may include a variety of (valid) UTF-8 encodings.
func randString(r *rand.Rand) string {
n := r.Intn(20)
runes := make([]rune, n)
for i := range runes {
runes[i] = unicodeRanges[r.Intn(len(unicodeRanges))].choose(r)
}
return string(runes)
}
// randUint64 makes random 64 bit numbers.
// Weirdly, rand doesn't have a function that gives you 64 random bits.
func randUint64(r *rand.Rand) uint64 {
return uint64(r.Uint32())<<32 | uint64(r.Uint32())
}

472
vendor/github.com/google/gofuzz/fuzz_test.go generated vendored Normal file
View File

@@ -0,0 +1,472 @@
/*
Copyright 2014 Google Inc. All rights reserved.
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
package fuzz
import (
"reflect"
"testing"
"time"
)
func TestFuzz_basic(t *testing.T) {
obj := &struct {
I int
I8 int8
I16 int16
I32 int32
I64 int64
U uint
U8 uint8
U16 uint16
U32 uint32
U64 uint64
Uptr uintptr
S string
B bool
T time.Time
}{}
failed := map[string]int{}
for i := 0; i < 10; i++ {
New().Fuzz(obj)
if n, v := "i", obj.I; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "i8", obj.I8; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "i16", obj.I16; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "i32", obj.I32; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "i64", obj.I64; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "u", obj.U; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "u8", obj.U8; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "u16", obj.U16; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "u32", obj.U32; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "u64", obj.U64; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "uptr", obj.Uptr; v == 0 {
failed[n] = failed[n] + 1
}
if n, v := "s", obj.S; v == "" {
failed[n] = failed[n] + 1
}
if n, v := "b", obj.B; v == false {
failed[n] = failed[n] + 1
}
if n, v := "t", obj.T; v.IsZero() {
failed[n] = failed[n] + 1
}
}
checkFailed(t, failed)
}
func checkFailed(t *testing.T, failed map[string]int) {
for k, v := range failed {
if v > 8 {
t.Errorf("%v seems to not be getting set, was zero value %v times", k, v)
}
}
}
func TestFuzz_structptr(t *testing.T) {
obj := &struct {
A *struct {
S string
}
}{}
f := New().NilChance(.5)
failed := map[string]int{}
for i := 0; i < 10; i++ {
f.Fuzz(obj)
if n, v := "a not nil", obj.A; v == nil {
failed[n] = failed[n] + 1
}
if n, v := "a nil", obj.A; v != nil {
failed[n] = failed[n] + 1
}
if n, v := "as", obj.A; v == nil || v.S == "" {
failed[n] = failed[n] + 1
}
}
checkFailed(t, failed)
}
// tryFuzz tries fuzzing up to 20 times. Fail if check() never passes, report the highest
// stage it ever got to.
func tryFuzz(t *testing.T, f *Fuzzer, obj interface{}, check func() (stage int, passed bool)) {
maxStage := 0
for i := 0; i < 20; i++ {
f.Fuzz(obj)
stage, passed := check()
if stage > maxStage {
maxStage = stage
}
if passed {
return
}
}
t.Errorf("Only ever got to stage %v", maxStage)
}
func TestFuzz_structmap(t *testing.T) {
obj := &struct {
A map[struct {
S string
}]struct {
S2 string
}
B map[string]string
}{}
tryFuzz(t, New(), obj, func() (int, bool) {
if obj.A == nil {
return 1, false
}
if len(obj.A) == 0 {
return 2, false
}
for k, v := range obj.A {
if k.S == "" {
return 3, false
}
if v.S2 == "" {
return 4, false
}
}
if obj.B == nil {
return 5, false
}
if len(obj.B) == 0 {
return 6, false
}
for k, v := range obj.B {
if k == "" {
return 7, false
}
if v == "" {
return 8, false
}
}
return 9, true
})
}
func TestFuzz_structslice(t *testing.T) {
obj := &struct {
A []struct {
S string
}
B []string
}{}
tryFuzz(t, New(), obj, func() (int, bool) {
if obj.A == nil {
return 1, false
}
if len(obj.A) == 0 {
return 2, false
}
for _, v := range obj.A {
if v.S == "" {
return 3, false
}
}
if obj.B == nil {
return 4, false
}
if len(obj.B) == 0 {
return 5, false
}
for _, v := range obj.B {
if v == "" {
return 6, false
}
}
return 7, true
})
}
func TestFuzz_structarray(t *testing.T) {
obj := &struct {
A [3]struct {
S string
}
B [2]int
}{}
tryFuzz(t, New(), obj, func() (int, bool) {
for _, v := range obj.A {
if v.S == "" {
return 1, false
}
}
for _, v := range obj.B {
if v == 0 {
return 2, false
}
}
return 3, true
})
}
func TestFuzz_custom(t *testing.T) {
obj := &struct {
A string
B *string
C map[string]string
D *map[string]string
}{}
testPhrase := "gotcalled"
testMap := map[string]string{"C": "D"}
f := New().Funcs(
func(s *string, c Continue) {
*s = testPhrase
},
func(m map[string]string, c Continue) {
m["C"] = "D"
},
)
tryFuzz(t, f, obj, func() (int, bool) {
if obj.A != testPhrase {
return 1, false
}
if obj.B == nil {
return 2, false
}
if *obj.B != testPhrase {
return 3, false
}
if e, a := testMap, obj.C; !reflect.DeepEqual(e, a) {
return 4, false
}
if obj.D == nil {
return 5, false
}
if e, a := testMap, *obj.D; !reflect.DeepEqual(e, a) {
return 6, false
}
return 7, true
})
}
type SelfFuzzer string
// Implement fuzz.Interface.
func (sf *SelfFuzzer) Fuzz(c Continue) {
*sf = selfFuzzerTestPhrase
}
const selfFuzzerTestPhrase = "was fuzzed"
func TestFuzz_interface(t *testing.T) {
f := New()
var obj1 SelfFuzzer
tryFuzz(t, f, &obj1, func() (int, bool) {
if obj1 != selfFuzzerTestPhrase {
return 1, false
}
return 1, true
})
var obj2 map[int]SelfFuzzer
tryFuzz(t, f, &obj2, func() (int, bool) {
for _, v := range obj2 {
if v != selfFuzzerTestPhrase {
return 1, false
}
}
return 1, true
})
}
func TestFuzz_interfaceAndFunc(t *testing.T) {
const privateTestPhrase = "private phrase"
f := New().Funcs(
// This should take precedence over SelfFuzzer.Fuzz().
func(s *SelfFuzzer, c Continue) {
*s = privateTestPhrase
},
)
var obj1 SelfFuzzer
tryFuzz(t, f, &obj1, func() (int, bool) {
if obj1 != privateTestPhrase {
return 1, false
}
return 1, true
})
var obj2 map[int]SelfFuzzer
tryFuzz(t, f, &obj2, func() (int, bool) {
for _, v := range obj2 {
if v != privateTestPhrase {
return 1, false
}
}
return 1, true
})
}
func TestFuzz_noCustom(t *testing.T) {
type Inner struct {
Str string
}
type Outer struct {
Str string
In Inner
}
testPhrase := "gotcalled"
f := New().Funcs(
func(outer *Outer, c Continue) {
outer.Str = testPhrase
c.Fuzz(&outer.In)
},
func(inner *Inner, c Continue) {
inner.Str = testPhrase
},
)
c := Continue{fc: &fuzzerContext{fuzzer: f}, Rand: f.r}
// Fuzzer.Fuzz()
obj1 := Outer{}
f.Fuzz(&obj1)
if obj1.Str != testPhrase {
t.Errorf("expected Outer custom function to have been called")
}
if obj1.In.Str != testPhrase {
t.Errorf("expected Inner custom function to have been called")
}
// Continue.Fuzz()
obj2 := Outer{}
c.Fuzz(&obj2)
if obj2.Str != testPhrase {
t.Errorf("expected Outer custom function to have been called")
}
if obj2.In.Str != testPhrase {
t.Errorf("expected Inner custom function to have been called")
}
// Fuzzer.FuzzNoCustom()
obj3 := Outer{}
f.FuzzNoCustom(&obj3)
if obj3.Str == testPhrase {
t.Errorf("expected Outer custom function to not have been called")
}
if obj3.In.Str != testPhrase {
t.Errorf("expected Inner custom function to have been called")
}
// Continue.FuzzNoCustom()
obj4 := Outer{}
c.FuzzNoCustom(&obj4)
if obj4.Str == testPhrase {
t.Errorf("expected Outer custom function to not have been called")
}
if obj4.In.Str != testPhrase {
t.Errorf("expected Inner custom function to have been called")
}
}
func TestFuzz_NumElements(t *testing.T) {
f := New().NilChance(0).NumElements(0, 1)
obj := &struct {
A []int
}{}
tryFuzz(t, f, obj, func() (int, bool) {
if obj.A == nil {
return 1, false
}
return 2, len(obj.A) == 0
})
tryFuzz(t, f, obj, func() (int, bool) {
if obj.A == nil {
return 3, false
}
return 4, len(obj.A) == 1
})
}
func TestFuzz_Maxdepth(t *testing.T) {
type S struct {
S *S
}
f := New().NilChance(0)
f.MaxDepth(1)
for i := 0; i < 100; i++ {
obj := S{}
f.Fuzz(&obj)
if obj.S != nil {
t.Errorf("Expected nil")
}
}
f.MaxDepth(3) // field, ptr
for i := 0; i < 100; i++ {
obj := S{}
f.Fuzz(&obj)
if obj.S == nil {
t.Errorf("Expected obj.S not nil")
} else if obj.S.S != nil {
t.Errorf("Expected obj.S.S nil")
}
}
f.MaxDepth(5) // field, ptr, field, ptr
for i := 0; i < 100; i++ {
obj := S{}
f.Fuzz(&obj)
if obj.S == nil {
t.Errorf("Expected obj.S not nil")
} else if obj.S.S == nil {
t.Errorf("Expected obj.S.S not nil")
} else if obj.S.S.S != nil {
t.Errorf("Expected obj.S.S.S nil")
}
}
}

9
vendor/github.com/google/uuid/.travis.yml generated vendored Normal file
View File

@@ -0,0 +1,9 @@
language: go
go:
- 1.4.3
- 1.5.3
- tip
script:
- go test -v ./...

10
vendor/github.com/google/uuid/CONTRIBUTING.md generated vendored Normal file
View File

@@ -0,0 +1,10 @@
# How to contribute
We definitely welcome patches and contribution to this project!
### Legal requirements
In order to protect both you and ourselves, you will need to sign the
[Contributor License Agreement](https://cla.developers.google.com/clas).
You may have already signed it for other Google projects.

9
vendor/github.com/google/uuid/CONTRIBUTORS generated vendored Normal file
View File

@@ -0,0 +1,9 @@
Paul Borman <borman@google.com>
bmatsuo
shawnps
theory
jboverfelt
dsymonds
cd1
wallclockbuilder
dansouza

27
vendor/github.com/google/uuid/LICENSE generated vendored Normal file
View File

@@ -0,0 +1,27 @@
Copyright (c) 2009,2014 Google Inc. All rights reserved.
Redistribution and use in source and binary forms, with or without
modification, are permitted provided that the following conditions are
met:
* Redistributions of source code must retain the above copyright
notice, this list of conditions and the following disclaimer.
* Redistributions in binary form must reproduce the above
copyright notice, this list of conditions and the following disclaimer
in the documentation and/or other materials provided with the
distribution.
* Neither the name of Google Inc. nor the names of its
contributors may be used to endorse or promote products derived from
this software without specific prior written permission.
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
"AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

23
vendor/github.com/google/uuid/README.md generated vendored Normal file
View File

@@ -0,0 +1,23 @@
**This package is currently in development and the API may not be stable.**
The API will become stable with v1.
# uuid ![build status](https://travis-ci.org/google/uuid.svg?branch=master)
The uuid package generates and inspects UUIDs based on
[RFC 4122](http://tools.ietf.org/html/rfc4122)
and DCE 1.1: Authentication and Security Services.
This package is based on the github.com/pborman/uuid package (previously named
code.google.com/p/go-uuid). It differs from these earlier packages in that
a UUID is a 16 byte array rather than a byte slice. One loss due to this
change is the ability to represent an invalid UUID (vs a NIL UUID).
###### Install
`go get github.com/google/uuid`
###### Documentation
[![GoDoc](https://godoc.org/github.com/google/uuid?status.svg)](http://godoc.org/github.com/google/uuid)
Full `go doc` style documentation for the package can be viewed online without
installing this package by using the GoDoc site here:
http://godoc.org/github.com/google/uuid

80
vendor/github.com/google/uuid/dce.go generated vendored Normal file
View File

@@ -0,0 +1,80 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"encoding/binary"
"fmt"
"os"
)
// A Domain represents a Version 2 domain
type Domain byte
// Domain constants for DCE Security (Version 2) UUIDs.
const (
Person = Domain(0)
Group = Domain(1)
Org = Domain(2)
)
// NewDCESecurity returns a DCE Security (Version 2) UUID.
//
// The domain should be one of Person, Group or Org.
// On a POSIX system the id should be the users UID for the Person
// domain and the users GID for the Group. The meaning of id for
// the domain Org or on non-POSIX systems is site defined.
//
// For a given domain/id pair the same token may be returned for up to
// 7 minutes and 10 seconds.
func NewDCESecurity(domain Domain, id uint32) (UUID, error) {
uuid, err := NewUUID()
if err == nil {
uuid[6] = (uuid[6] & 0x0f) | 0x20 // Version 2
uuid[9] = byte(domain)
binary.BigEndian.PutUint32(uuid[0:], id)
}
return uuid, err
}
// NewDCEPerson returns a DCE Security (Version 2) UUID in the person
// domain with the id returned by os.Getuid.
//
// NewDCEPerson(Person, uint32(os.Getuid()))
func NewDCEPerson() (UUID, error) {
return NewDCESecurity(Person, uint32(os.Getuid()))
}
// NewDCEGroup returns a DCE Security (Version 2) UUID in the group
// domain with the id returned by os.Getgid.
//
// NewDCEGroup(Group, uint32(os.Getgid()))
func NewDCEGroup() (UUID, error) {
return NewDCESecurity(Group, uint32(os.Getgid()))
}
// Domain returns the domain for a Version 2 UUID. Domains are only defined
// for Version 2 UUIDs.
func (uuid UUID) Domain() Domain {
return Domain(uuid[9])
}
// ID returns the id for a Version 2 UUID. IDs are only defined for Version 2
// UUIDs.
func (uuid UUID) ID() uint32 {
return binary.BigEndian.Uint32(uuid[0:4])
}
func (d Domain) String() string {
switch d {
case Person:
return "Person"
case Group:
return "Group"
case Org:
return "Org"
}
return fmt.Sprintf("Domain%d", int(d))
}

12
vendor/github.com/google/uuid/doc.go generated vendored Normal file
View File

@@ -0,0 +1,12 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package uuid generates and inspects UUIDs.
//
// UUIDs are based on RFC 4122 and DCE 1.1: Authentication and Security
// Services.
//
// A UUID is a 16 byte (128 bit) array. UUIDs may be used as keys to
// maps or compared directly.
package uuid

53
vendor/github.com/google/uuid/hash.go generated vendored Normal file
View File

@@ -0,0 +1,53 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"crypto/md5"
"crypto/sha1"
"hash"
)
// Well known namespace IDs and UUIDs
var (
NameSpaceDNS = Must(Parse("6ba7b810-9dad-11d1-80b4-00c04fd430c8"))
NameSpaceURL = Must(Parse("6ba7b811-9dad-11d1-80b4-00c04fd430c8"))
NameSpaceOID = Must(Parse("6ba7b812-9dad-11d1-80b4-00c04fd430c8"))
NameSpaceX500 = Must(Parse("6ba7b814-9dad-11d1-80b4-00c04fd430c8"))
Nil UUID // empty UUID, all zeros
)
// NewHash returns a new UUID derived from the hash of space concatenated with
// data generated by h. The hash should be at least 16 byte in length. The
// first 16 bytes of the hash are used to form the UUID. The version of the
// UUID will be the lower 4 bits of version. NewHash is used to implement
// NewMD5 and NewSHA1.
func NewHash(h hash.Hash, space UUID, data []byte, version int) UUID {
h.Reset()
h.Write(space[:])
h.Write([]byte(data))
s := h.Sum(nil)
var uuid UUID
copy(uuid[:], s)
uuid[6] = (uuid[6] & 0x0f) | uint8((version&0xf)<<4)
uuid[8] = (uuid[8] & 0x3f) | 0x80 // RFC 4122 variant
return uuid
}
// NewMD5 returns a new MD5 (Version 3) UUID based on the
// supplied name space and data. It is the same as calling:
//
// NewHash(md5.New(), space, data, 3)
func NewMD5(space UUID, data []byte) UUID {
return NewHash(md5.New(), space, data, 3)
}
// NewSHA1 returns a new SHA1 (Version 5) UUID based on the
// supplied name space and data. It is the same as calling:
//
// NewHash(sha1.New(), space, data, 5)
func NewSHA1(space UUID, data []byte) UUID {
return NewHash(sha1.New(), space, data, 5)
}

62
vendor/github.com/google/uuid/json_test.go generated vendored Normal file
View File

@@ -0,0 +1,62 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"encoding/json"
"reflect"
"testing"
)
var testUUID = Must(Parse("f47ac10b-58cc-0372-8567-0e02b2c3d479"))
func TestJSON(t *testing.T) {
type S struct {
ID1 UUID
ID2 UUID
}
s1 := S{ID1: testUUID}
data, err := json.Marshal(&s1)
if err != nil {
t.Fatal(err)
}
var s2 S
if err := json.Unmarshal(data, &s2); err != nil {
t.Fatal(err)
}
if !reflect.DeepEqual(&s1, &s2) {
t.Errorf("got %#v, want %#v", s2, s1)
}
}
func BenchmarkUUID_MarshalJSON(b *testing.B) {
x := &struct {
UUID UUID `json:"uuid"`
}{}
var err error
x.UUID, err = Parse("f47ac10b-58cc-0372-8567-0e02b2c3d479")
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
js, err := json.Marshal(x)
if err != nil {
b.Fatalf("marshal json: %#v (%v)", js, err)
}
}
}
func BenchmarkUUID_UnmarshalJSON(b *testing.B) {
js := []byte(`{"uuid":"f47ac10b-58cc-0372-8567-0e02b2c3d479"}`)
var x *struct {
UUID UUID `json:"uuid"`
}
for i := 0; i < b.N; i++ {
err := json.Unmarshal(js, &x)
if err != nil {
b.Fatalf("marshal json: %#v (%v)", js, err)
}
}
}

39
vendor/github.com/google/uuid/marshal.go generated vendored Normal file
View File

@@ -0,0 +1,39 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import "fmt"
// MarshalText implements encoding.TextMarshaler.
func (uuid UUID) MarshalText() ([]byte, error) {
var js [36]byte
encodeHex(js[:], uuid)
return js[:], nil
}
// UnmarshalText implements encoding.TextUnmarshaler.
func (uuid *UUID) UnmarshalText(data []byte) error {
// See comment in ParseBytes why we do this.
// id, err := ParseBytes(data)
id, err := ParseBytes(data)
if err == nil {
*uuid = id
}
return err
}
// MarshalBinary implements encoding.BinaryMarshaler.
func (uuid UUID) MarshalBinary() ([]byte, error) {
return uuid[:], nil
}
// UnmarshalBinary implements encoding.BinaryUnmarshaler.
func (uuid *UUID) UnmarshalBinary(data []byte) error {
if len(data) != 16 {
return fmt.Errorf("invalid UUID (got %d bytes)", len(data))
}
copy(uuid[:], data)
return nil
}

103
vendor/github.com/google/uuid/node.go generated vendored Normal file
View File

@@ -0,0 +1,103 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"net"
"sync"
)
var (
nodeMu sync.Mutex
interfaces []net.Interface // cached list of interfaces
ifname string // name of interface being used
nodeID [6]byte // hardware for version 1 UUIDs
zeroID [6]byte // nodeID with only 0's
)
// NodeInterface returns the name of the interface from which the NodeID was
// derived. The interface "user" is returned if the NodeID was set by
// SetNodeID.
func NodeInterface() string {
defer nodeMu.Unlock()
nodeMu.Lock()
return ifname
}
// SetNodeInterface selects the hardware address to be used for Version 1 UUIDs.
// If name is "" then the first usable interface found will be used or a random
// Node ID will be generated. If a named interface cannot be found then false
// is returned.
//
// SetNodeInterface never fails when name is "".
func SetNodeInterface(name string) bool {
defer nodeMu.Unlock()
nodeMu.Lock()
return setNodeInterface(name)
}
func setNodeInterface(name string) bool {
if interfaces == nil {
var err error
interfaces, err = net.Interfaces()
if err != nil && name != "" {
return false
}
}
for _, ifs := range interfaces {
if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
copy(nodeID[:], ifs.HardwareAddr)
ifname = ifs.Name
return true
}
}
// We found no interfaces with a valid hardware address. If name
// does not specify a specific interface generate a random Node ID
// (section 4.1.6)
if name == "" {
randomBits(nodeID[:])
return true
}
return false
}
// NodeID returns a slice of a copy of the current Node ID, setting the Node ID
// if not already set.
func NodeID() []byte {
defer nodeMu.Unlock()
nodeMu.Lock()
if nodeID == zeroID {
setNodeInterface("")
}
nid := nodeID
return nid[:]
}
// SetNodeID sets the Node ID to be used for Version 1 UUIDs. The first 6 bytes
// of id are used. If id is less than 6 bytes then false is returned and the
// Node ID is not set.
func SetNodeID(id []byte) bool {
if len(id) < 6 {
return false
}
defer nodeMu.Unlock()
nodeMu.Lock()
copy(nodeID[:], id)
ifname = "user"
return true
}
// NodeID returns the 6 byte node id encoded in uuid. It returns nil if uuid is
// not valid. The NodeID is only well defined for version 1 and 2 UUIDs.
func (uuid UUID) NodeID() []byte {
if len(uuid) != 16 {
return nil
}
var node [6]byte
copy(node[:], uuid[10:])
return node[:]
}

66
vendor/github.com/google/uuid/seq_test.go generated vendored Normal file
View File

@@ -0,0 +1,66 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"flag"
"runtime"
"testing"
"time"
)
// This test is only run when --regressions is passed on the go test line.
var regressions = flag.Bool("regressions", false, "run uuid regression tests")
// TestClockSeqRace tests for a particular race condition of returning two
// identical Version1 UUIDs. The duration of 1 minute was chosen as the race
// condition, before being fixed, nearly always occured in under 30 seconds.
func TestClockSeqRace(t *testing.T) {
if !*regressions {
t.Skip("skipping regression tests")
}
duration := time.Minute
done := make(chan struct{})
defer close(done)
ch := make(chan UUID, 10000)
ncpu := runtime.NumCPU()
switch ncpu {
case 0, 1:
// We can't run the test effectively.
t.Skip("skipping race test, only one CPU detected")
return
default:
runtime.GOMAXPROCS(ncpu)
}
for i := 0; i < ncpu; i++ {
go func() {
for {
select {
case <-done:
return
case ch <- Must(NewUUID()):
}
}
}()
}
uuids := make(map[string]bool)
cnt := 0
start := time.Now()
for u := range ch {
s := u.String()
if uuids[s] {
t.Errorf("duplicate uuid after %d in %v: %s", cnt, time.Since(start), s)
return
}
uuids[s] = true
if time.Since(start) > duration {
return
}
cnt++
}
}

58
vendor/github.com/google/uuid/sql.go generated vendored Normal file
View File

@@ -0,0 +1,58 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"database/sql/driver"
"fmt"
)
// Scan implements sql.Scanner so UUIDs can be read from databases transparently
// Currently, database types that map to string and []byte are supported. Please
// consult database-specific driver documentation for matching types.
func (uuid *UUID) Scan(src interface{}) error {
switch src.(type) {
case string:
// if an empty UUID comes from a table, we return a null UUID
if src.(string) == "" {
return nil
}
// see Parse for required string format
u, err := Parse(src.(string))
if err != nil {
return fmt.Errorf("Scan: %v", err)
}
*uuid = u
case []byte:
b := src.([]byte)
// if an empty UUID comes from a table, we return a null UUID
if len(b) == 0 {
return nil
}
// assumes a simple slice of bytes if 16 bytes
// otherwise attempts to parse
if len(b) != 16 {
return uuid.Scan(string(b))
}
copy((*uuid)[:], b)
default:
return fmt.Errorf("Scan: unable to scan type %T into UUID", src)
}
return nil
}
// Value implements sql.Valuer so that UUIDs can be written to databases
// transparently. Currently, UUIDs map to strings. Please consult
// database-specific driver documentation for matching types.
func (uuid UUID) Value() (driver.Value, error) {
return uuid.String(), nil
}

102
vendor/github.com/google/uuid/sql_test.go generated vendored Normal file
View File

@@ -0,0 +1,102 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"strings"
"testing"
)
func TestScan(t *testing.T) {
var stringTest string = "f47ac10b-58cc-0372-8567-0e02b2c3d479"
var badTypeTest int = 6
var invalidTest string = "f47ac10b-58cc-0372-8567-0e02b2c3d4"
byteTest := make([]byte, 16)
byteTestUUID := Must(Parse(stringTest))
copy(byteTest, byteTestUUID[:])
// sunny day tests
var uuid UUID
err := (&uuid).Scan(stringTest)
if err != nil {
t.Fatal(err)
}
err = (&uuid).Scan([]byte(stringTest))
if err != nil {
t.Fatal(err)
}
err = (&uuid).Scan(byteTest)
if err != nil {
t.Fatal(err)
}
// bad type tests
err = (&uuid).Scan(badTypeTest)
if err == nil {
t.Error("int correctly parsed and shouldn't have")
}
if !strings.Contains(err.Error(), "unable to scan type") {
t.Error("attempting to parse an int returned an incorrect error message")
}
// invalid/incomplete uuids
err = (&uuid).Scan(invalidTest)
if err == nil {
t.Error("invalid uuid was parsed without error")
}
if !strings.Contains(err.Error(), "invalid UUID") {
t.Error("attempting to parse an invalid UUID returned an incorrect error message")
}
err = (&uuid).Scan(byteTest[:len(byteTest)-2])
if err == nil {
t.Error("invalid byte uuid was parsed without error")
}
if !strings.Contains(err.Error(), "invalid UUID") {
t.Error("attempting to parse an invalid byte UUID returned an incorrect error message")
}
// empty tests
uuid = UUID{}
var emptySlice []byte
err = (&uuid).Scan(emptySlice)
if err != nil {
t.Fatal(err)
}
for _, v := range uuid {
if v != 0 {
t.Error("UUID was not nil after scanning empty byte slice")
}
}
uuid = UUID{}
var emptyString string
err = (&uuid).Scan(emptyString)
if err != nil {
t.Fatal(err)
}
for _, v := range uuid {
if v != 0 {
t.Error("UUID was not nil after scanning empty byte slice")
}
}
}
func TestValue(t *testing.T) {
stringTest := "f47ac10b-58cc-0372-8567-0e02b2c3d479"
uuid := Must(Parse(stringTest))
val, _ := uuid.Value()
if val != stringTest {
t.Error("Value() did not return expected string")
}
}

123
vendor/github.com/google/uuid/time.go generated vendored Normal file
View File

@@ -0,0 +1,123 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"encoding/binary"
"sync"
"time"
)
// A Time represents a time as the number of 100's of nanoseconds since 15 Oct
// 1582.
type Time int64
const (
lillian = 2299160 // Julian day of 15 Oct 1582
unix = 2440587 // Julian day of 1 Jan 1970
epoch = unix - lillian // Days between epochs
g1582 = epoch * 86400 // seconds between epochs
g1582ns100 = g1582 * 10000000 // 100s of a nanoseconds between epochs
)
var (
timeMu sync.Mutex
lasttime uint64 // last time we returned
clockSeq uint16 // clock sequence for this run
timeNow = time.Now // for testing
)
// UnixTime converts t the number of seconds and nanoseconds using the Unix
// epoch of 1 Jan 1970.
func (t Time) UnixTime() (sec, nsec int64) {
sec = int64(t - g1582ns100)
nsec = (sec % 10000000) * 100
sec /= 10000000
return sec, nsec
}
// GetTime returns the current Time (100s of nanoseconds since 15 Oct 1582) and
// clock sequence as well as adjusting the clock sequence as needed. An error
// is returned if the current time cannot be determined.
func GetTime() (Time, uint16, error) {
defer timeMu.Unlock()
timeMu.Lock()
return getTime()
}
func getTime() (Time, uint16, error) {
t := timeNow()
// If we don't have a clock sequence already, set one.
if clockSeq == 0 {
setClockSequence(-1)
}
now := uint64(t.UnixNano()/100) + g1582ns100
// If time has gone backwards with this clock sequence then we
// increment the clock sequence
if now <= lasttime {
clockSeq = ((clockSeq + 1) & 0x3fff) | 0x8000
}
lasttime = now
return Time(now), clockSeq, nil
}
// ClockSequence returns the current clock sequence, generating one if not
// already set. The clock sequence is only used for Version 1 UUIDs.
//
// The uuid package does not use global static storage for the clock sequence or
// the last time a UUID was generated. Unless SetClockSequence is used, a new
// random clock sequence is generated the first time a clock sequence is
// requested by ClockSequence, GetTime, or NewUUID. (section 4.2.1.1)
func ClockSequence() int {
defer timeMu.Unlock()
timeMu.Lock()
return clockSequence()
}
func clockSequence() int {
if clockSeq == 0 {
setClockSequence(-1)
}
return int(clockSeq & 0x3fff)
}
// SetClockSeq sets the clock sequence to the lower 14 bits of seq. Setting to
// -1 causes a new sequence to be generated.
func SetClockSequence(seq int) {
defer timeMu.Unlock()
timeMu.Lock()
setClockSequence(seq)
}
func setClockSequence(seq int) {
if seq == -1 {
var b [2]byte
randomBits(b[:]) // clock sequence
seq = int(b[0])<<8 | int(b[1])
}
old_seq := clockSeq
clockSeq = uint16(seq&0x3fff) | 0x8000 // Set our variant
if old_seq != clockSeq {
lasttime = 0
}
}
// Time returns the time in 100s of nanoseconds since 15 Oct 1582 encoded in
// uuid. The time is only defined for version 1 and 2 UUIDs.
func (uuid UUID) Time() Time {
time := int64(binary.BigEndian.Uint32(uuid[0:4]))
time |= int64(binary.BigEndian.Uint16(uuid[4:6])) << 32
time |= int64(binary.BigEndian.Uint16(uuid[6:8])&0xfff) << 48
return Time(time)
}
// ClockSequence returns the clock sequence encoded in uuid.
// The clock sequence is only well defined for version 1 and 2 UUIDs.
func (uuid UUID) ClockSequence() int {
return int(binary.BigEndian.Uint16(uuid[8:10])) & 0x3fff
}

43
vendor/github.com/google/uuid/util.go generated vendored Normal file
View File

@@ -0,0 +1,43 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"io"
)
// randomBits completely fills slice b with random data.
func randomBits(b []byte) {
if _, err := io.ReadFull(rander, b); err != nil {
panic(err.Error()) // rand should never fail
}
}
// xvalues returns the value of a byte as a hexadecimal digit or 255.
var xvalues = [256]byte{
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 255, 255, 255, 255, 255, 255,
255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 10, 11, 12, 13, 14, 15, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255,
}
// xtob converts hex characters x1 and x2 into a byte.
func xtob(x1, x2 byte) (byte, bool) {
b1 := xvalues[x1]
b2 := xvalues[x2]
return (b1 << 4) | b2, b1 != 255 && b2 != 255
}

191
vendor/github.com/google/uuid/uuid.go generated vendored Normal file
View File

@@ -0,0 +1,191 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"bytes"
"crypto/rand"
"encoding/hex"
"errors"
"fmt"
"io"
"strings"
)
// A UUID is a 128 bit (16 byte) Universal Unique IDentifier as defined in RFC
// 4122.
type UUID [16]byte
// A Version represents a UUID's version.
type Version byte
// A Variant represents a UUID's variant.
type Variant byte
// Constants returned by Variant.
const (
Invalid = Variant(iota) // Invalid UUID
RFC4122 // The variant specified in RFC4122
Reserved // Reserved, NCS backward compatibility.
Microsoft // Reserved, Microsoft Corporation backward compatibility.
Future // Reserved for future definition.
)
var rander = rand.Reader // random function
// Parse decodes s into a UUID or returns an error. Both the UUID form of
// xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx are decoded.
func Parse(s string) (UUID, error) {
var uuid UUID
if len(s) != 36 {
if len(s) != 36+9 {
return uuid, fmt.Errorf("invalid UUID length: %d", len(s))
}
if strings.ToLower(s[:9]) != "urn:uuid:" {
return uuid, fmt.Errorf("invalid urn prefix: %q", s[:9])
}
s = s[9:]
}
if s[8] != '-' || s[13] != '-' || s[18] != '-' || s[23] != '-' {
return uuid, errors.New("invalid UUID format")
}
for i, x := range [16]int{
0, 2, 4, 6,
9, 11,
14, 16,
19, 21,
24, 26, 28, 30, 32, 34} {
if v, ok := xtob(s[x], s[x+1]); !ok {
return uuid, errors.New("invalid UUID format")
} else {
uuid[i] = v
}
}
return uuid, nil
}
// ParseBytes is like Parse, except it parses a byte slice instead of a string.
func ParseBytes(b []byte) (UUID, error) {
var uuid UUID
if len(b) != 36 {
if len(b) != 36+9 {
return uuid, fmt.Errorf("invalid UUID length: %d", len(b))
}
if !bytes.Equal(bytes.ToLower(b[:9]), []byte("urn:uuid:")) {
return uuid, fmt.Errorf("invalid urn prefix: %q", b[:9])
}
b = b[9:]
}
if b[8] != '-' || b[13] != '-' || b[18] != '-' || b[23] != '-' {
return uuid, errors.New("invalid UUID format")
}
for i, x := range [16]int{
0, 2, 4, 6,
9, 11,
14, 16,
19, 21,
24, 26, 28, 30, 32, 34} {
if v, ok := xtob(b[x], b[x+1]); !ok {
return uuid, errors.New("invalid UUID format")
} else {
uuid[i] = v
}
}
return uuid, nil
}
// Must returns uuid if err is nil and panics otherwise.
func Must(uuid UUID, err error) UUID {
if err != nil {
panic(err)
}
return uuid
}
// String returns the string form of uuid, xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
// , or "" if uuid is invalid.
func (uuid UUID) String() string {
var buf [36]byte
encodeHex(buf[:], uuid)
return string(buf[:])
}
// URN returns the RFC 2141 URN form of uuid,
// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx, or "" if uuid is invalid.
func (uuid UUID) URN() string {
var buf [36 + 9]byte
copy(buf[:], "urn:uuid:")
encodeHex(buf[9:], uuid)
return string(buf[:])
}
func encodeHex(dst []byte, uuid UUID) {
hex.Encode(dst[:], uuid[:4])
dst[8] = '-'
hex.Encode(dst[9:13], uuid[4:6])
dst[13] = '-'
hex.Encode(dst[14:18], uuid[6:8])
dst[18] = '-'
hex.Encode(dst[19:23], uuid[8:10])
dst[23] = '-'
hex.Encode(dst[24:], uuid[10:])
}
// Variant returns the variant encoded in uuid.
func (uuid UUID) Variant() Variant {
switch {
case (uuid[8] & 0xc0) == 0x80:
return RFC4122
case (uuid[8] & 0xe0) == 0xc0:
return Microsoft
case (uuid[8] & 0xe0) == 0xe0:
return Future
default:
return Reserved
}
}
// Version returns the version of uuid.
func (uuid UUID) Version() Version {
return Version(uuid[6] >> 4)
}
func (v Version) String() string {
if v > 15 {
return fmt.Sprintf("BAD_VERSION_%d", v)
}
return fmt.Sprintf("VERSION_%d", v)
}
func (v Variant) String() string {
switch v {
case RFC4122:
return "RFC4122"
case Reserved:
return "Reserved"
case Microsoft:
return "Microsoft"
case Future:
return "Future"
case Invalid:
return "Invalid"
}
return fmt.Sprintf("BadVariant%d", int(v))
}
// SetRand sets the random number generator to r, which implents io.Reader.
// If r.Read returns an error when the package requests random data then
// a panic will be issued.
//
// Calling SetRand with nil sets the random number generator to the default
// generator.
func SetRand(r io.Reader) {
if r == nil {
rander = rand.Reader
return
}
rander = r
}

526
vendor/github.com/google/uuid/uuid_test.go generated vendored Normal file
View File

@@ -0,0 +1,526 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"bytes"
"fmt"
"os"
"strings"
"testing"
"time"
"unsafe"
)
type test struct {
in string
version Version
variant Variant
isuuid bool
}
var tests = []test{
{"f47ac10b-58cc-0372-8567-0e02b2c3d479", 0, RFC4122, true},
{"f47ac10b-58cc-1372-8567-0e02b2c3d479", 1, RFC4122, true},
{"f47ac10b-58cc-2372-8567-0e02b2c3d479", 2, RFC4122, true},
{"f47ac10b-58cc-3372-8567-0e02b2c3d479", 3, RFC4122, true},
{"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
{"f47ac10b-58cc-5372-8567-0e02b2c3d479", 5, RFC4122, true},
{"f47ac10b-58cc-6372-8567-0e02b2c3d479", 6, RFC4122, true},
{"f47ac10b-58cc-7372-8567-0e02b2c3d479", 7, RFC4122, true},
{"f47ac10b-58cc-8372-8567-0e02b2c3d479", 8, RFC4122, true},
{"f47ac10b-58cc-9372-8567-0e02b2c3d479", 9, RFC4122, true},
{"f47ac10b-58cc-a372-8567-0e02b2c3d479", 10, RFC4122, true},
{"f47ac10b-58cc-b372-8567-0e02b2c3d479", 11, RFC4122, true},
{"f47ac10b-58cc-c372-8567-0e02b2c3d479", 12, RFC4122, true},
{"f47ac10b-58cc-d372-8567-0e02b2c3d479", 13, RFC4122, true},
{"f47ac10b-58cc-e372-8567-0e02b2c3d479", 14, RFC4122, true},
{"f47ac10b-58cc-f372-8567-0e02b2c3d479", 15, RFC4122, true},
{"urn:uuid:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
{"URN:UUID:f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-0567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-1567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-2567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-3567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-4567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-5567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-6567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-7567-0e02b2c3d479", 4, Reserved, true},
{"f47ac10b-58cc-4372-8567-0e02b2c3d479", 4, RFC4122, true},
{"f47ac10b-58cc-4372-9567-0e02b2c3d479", 4, RFC4122, true},
{"f47ac10b-58cc-4372-a567-0e02b2c3d479", 4, RFC4122, true},
{"f47ac10b-58cc-4372-b567-0e02b2c3d479", 4, RFC4122, true},
{"f47ac10b-58cc-4372-c567-0e02b2c3d479", 4, Microsoft, true},
{"f47ac10b-58cc-4372-d567-0e02b2c3d479", 4, Microsoft, true},
{"f47ac10b-58cc-4372-e567-0e02b2c3d479", 4, Future, true},
{"f47ac10b-58cc-4372-f567-0e02b2c3d479", 4, Future, true},
{"f47ac10b158cc-5372-a567-0e02b2c3d479", 0, Invalid, false},
{"f47ac10b-58cc25372-a567-0e02b2c3d479", 0, Invalid, false},
{"f47ac10b-58cc-53723a567-0e02b2c3d479", 0, Invalid, false},
{"f47ac10b-58cc-5372-a56740e02b2c3d479", 0, Invalid, false},
{"f47ac10b-58cc-5372-a567-0e02-2c3d479", 0, Invalid, false},
{"g47ac10b-58cc-4372-a567-0e02b2c3d479", 0, Invalid, false},
}
var constants = []struct {
c interface{}
name string
}{
{Person, "Person"},
{Group, "Group"},
{Org, "Org"},
{Invalid, "Invalid"},
{RFC4122, "RFC4122"},
{Reserved, "Reserved"},
{Microsoft, "Microsoft"},
{Future, "Future"},
{Domain(17), "Domain17"},
{Variant(42), "BadVariant42"},
}
func testTest(t *testing.T, in string, tt test) {
uuid, err := Parse(in)
if ok := (err == nil); ok != tt.isuuid {
t.Errorf("Parse(%s) got %v expected %v\b", in, ok, tt.isuuid)
}
if err != nil {
return
}
if v := uuid.Variant(); v != tt.variant {
t.Errorf("Variant(%s) got %d expected %d\b", in, v, tt.variant)
}
if v := uuid.Version(); v != tt.version {
t.Errorf("Version(%s) got %d expected %d\b", in, v, tt.version)
}
}
func testBytes(t *testing.T, in []byte, tt test) {
uuid, err := ParseBytes(in)
if ok := (err == nil); ok != tt.isuuid {
t.Errorf("ParseBytes(%s) got %v expected %v\b", in, ok, tt.isuuid)
}
if err != nil {
return
}
suuid, _ := Parse(string(in))
if uuid != suuid {
t.Errorf("ParseBytes(%s) got %v expected %v\b", in, uuid, suuid)
}
}
func TestUUID(t *testing.T) {
for _, tt := range tests {
testTest(t, tt.in, tt)
testTest(t, strings.ToUpper(tt.in), tt)
testBytes(t, []byte(tt.in), tt)
}
}
func TestConstants(t *testing.T) {
for x, tt := range constants {
v, ok := tt.c.(fmt.Stringer)
if !ok {
t.Errorf("%x: %v: not a stringer", x, v)
} else if s := v.String(); s != tt.name {
v, _ := tt.c.(int)
t.Errorf("%x: Constant %T:%d gives %q, expected %q", x, tt.c, v, s, tt.name)
}
}
}
func TestRandomUUID(t *testing.T) {
m := make(map[string]bool)
for x := 1; x < 32; x++ {
uuid := New()
s := uuid.String()
if m[s] {
t.Errorf("NewRandom returned duplicated UUID %s", s)
}
m[s] = true
if v := uuid.Version(); v != 4 {
t.Errorf("Random UUID of version %s", v)
}
if uuid.Variant() != RFC4122 {
t.Errorf("Random UUID is variant %d", uuid.Variant())
}
}
}
func TestNew(t *testing.T) {
m := make(map[UUID]bool)
for x := 1; x < 32; x++ {
s := New()
if m[s] {
t.Errorf("New returned duplicated UUID %s", s)
}
m[s] = true
uuid, err := Parse(s.String())
if err != nil {
t.Errorf("New.String() returned %q which does not decode", s)
continue
}
if v := uuid.Version(); v != 4 {
t.Errorf("Random UUID of version %s", v)
}
if uuid.Variant() != RFC4122 {
t.Errorf("Random UUID is variant %d", uuid.Variant())
}
}
}
func TestClockSeq(t *testing.T) {
// Fake time.Now for this test to return a monotonically advancing time; restore it at end.
defer func(orig func() time.Time) { timeNow = orig }(timeNow)
monTime := time.Now()
timeNow = func() time.Time {
monTime = monTime.Add(1 * time.Second)
return monTime
}
SetClockSequence(-1)
uuid1, err := NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
uuid2, err := NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
if s1, s2 := uuid1.ClockSequence(), uuid2.ClockSequence(); s1 != s2 {
t.Errorf("clock sequence %d != %d", s1, s2)
}
SetClockSequence(-1)
uuid2, err = NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
// Just on the very off chance we generated the same sequence
// two times we try again.
if uuid1.ClockSequence() == uuid2.ClockSequence() {
SetClockSequence(-1)
uuid2, err = NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
}
if s1, s2 := uuid1.ClockSequence(), uuid2.ClockSequence(); s1 == s2 {
t.Errorf("Duplicate clock sequence %d", s1)
}
SetClockSequence(0x1234)
uuid1, err = NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
if seq := uuid1.ClockSequence(); seq != 0x1234 {
t.Errorf("%s: expected seq 0x1234 got 0x%04x", uuid1, seq)
}
}
func TestCoding(t *testing.T) {
text := "7d444840-9dc0-11d1-b245-5ffdce74fad2"
urn := "urn:uuid:7d444840-9dc0-11d1-b245-5ffdce74fad2"
data := UUID{
0x7d, 0x44, 0x48, 0x40,
0x9d, 0xc0,
0x11, 0xd1,
0xb2, 0x45,
0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2,
}
if v := data.String(); v != text {
t.Errorf("%x: encoded to %s, expected %s", data, v, text)
}
if v := data.URN(); v != urn {
t.Errorf("%x: urn is %s, expected %s", data, v, urn)
}
uuid, err := Parse(text)
if err != nil {
t.Errorf("Parse returned unexpected error %v", err)
}
if data != data {
t.Errorf("%s: decoded to %s, expected %s", text, uuid, data)
}
}
func TestVersion1(t *testing.T) {
uuid1, err := NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
uuid2, err := NewUUID()
if err != nil {
t.Fatalf("could not create UUID: %v", err)
}
if uuid1 == uuid2 {
t.Errorf("%s:duplicate uuid", uuid1)
}
if v := uuid1.Version(); v != 1 {
t.Errorf("%s: version %s expected 1", uuid1, v)
}
if v := uuid2.Version(); v != 1 {
t.Errorf("%s: version %s expected 1", uuid2, v)
}
n1 := uuid1.NodeID()
n2 := uuid2.NodeID()
if !bytes.Equal(n1, n2) {
t.Errorf("Different nodes %x != %x", n1, n2)
}
t1 := uuid1.Time()
t2 := uuid2.Time()
q1 := uuid1.ClockSequence()
q2 := uuid2.ClockSequence()
switch {
case t1 == t2 && q1 == q2:
t.Error("time stopped")
case t1 > t2 && q1 == q2:
t.Error("time reversed")
case t1 < t2 && q1 != q2:
t.Error("clock sequence chaned unexpectedly")
}
}
func TestNode(t *testing.T) {
// This test is mostly to make sure we don't leave nodeMu locked.
ifname = ""
if ni := NodeInterface(); ni != "" {
t.Errorf("NodeInterface got %q, want %q", ni, "")
}
if SetNodeInterface("xyzzy") {
t.Error("SetNodeInterface succeeded on a bad interface name")
}
if !SetNodeInterface("") {
t.Error("SetNodeInterface failed")
}
if ni := NodeInterface(); ni == "" {
t.Error("NodeInterface returned an empty string")
}
ni := NodeID()
if len(ni) != 6 {
t.Errorf("ni got %d bytes, want 6", len(ni))
}
hasData := false
for _, b := range ni {
if b != 0 {
hasData = true
}
}
if !hasData {
t.Error("nodeid is all zeros")
}
id := []byte{1, 2, 3, 4, 5, 6, 7, 8}
SetNodeID(id)
ni = NodeID()
if !bytes.Equal(ni, id[:6]) {
t.Errorf("got nodeid %v, want %v", ni, id[:6])
}
if ni := NodeInterface(); ni != "user" {
t.Errorf("got inteface %q, want %q", ni, "user")
}
}
func TestNodeAndTime(t *testing.T) {
// Time is February 5, 1998 12:30:23.136364800 AM GMT
uuid, err := Parse("7d444840-9dc0-11d1-b245-5ffdce74fad2")
if err != nil {
t.Fatalf("Parser returned unexpected error %v", err)
}
node := []byte{0x5f, 0xfd, 0xce, 0x74, 0xfa, 0xd2}
ts := uuid.Time()
c := time.Unix(ts.UnixTime())
want := time.Date(1998, 2, 5, 0, 30, 23, 136364800, time.UTC)
if !c.Equal(want) {
t.Errorf("Got time %v, want %v", c, want)
}
if !bytes.Equal(node, uuid.NodeID()) {
t.Errorf("Expected node %v got %v", node, uuid.NodeID())
}
}
func TestMD5(t *testing.T) {
uuid := NewMD5(NameSpaceDNS, []byte("python.org")).String()
want := "6fa459ea-ee8a-3ca4-894e-db77e160355e"
if uuid != want {
t.Errorf("MD5: got %q expected %q", uuid, want)
}
}
func TestSHA1(t *testing.T) {
uuid := NewSHA1(NameSpaceDNS, []byte("python.org")).String()
want := "886313e1-3b8a-5372-9b90-0c9aee199e5d"
if uuid != want {
t.Errorf("SHA1: got %q expected %q", uuid, want)
}
}
func TestNodeID(t *testing.T) {
nid := []byte{1, 2, 3, 4, 5, 6}
SetNodeInterface("")
s := NodeInterface()
if s == "" || s == "user" {
t.Errorf("NodeInterface %q after SetInteface", s)
}
node1 := NodeID()
if node1 == nil {
t.Error("NodeID nil after SetNodeInterface", s)
}
SetNodeID(nid)
s = NodeInterface()
if s != "user" {
t.Errorf("Expected NodeInterface %q got %q", "user", s)
}
node2 := NodeID()
if node2 == nil {
t.Error("NodeID nil after SetNodeID", s)
}
if bytes.Equal(node1, node2) {
t.Error("NodeID not changed after SetNodeID", s)
} else if !bytes.Equal(nid, node2) {
t.Errorf("NodeID is %x, expected %x", node2, nid)
}
}
func testDCE(t *testing.T, name string, uuid UUID, err error, domain Domain, id uint32) {
if err != nil {
t.Errorf("%s failed: %v", name, err)
return
}
if v := uuid.Version(); v != 2 {
t.Errorf("%s: %s: expected version 2, got %s", name, uuid, v)
return
}
if v := uuid.Domain(); v != domain {
t.Errorf("%s: %s: expected domain %d, got %d", name, uuid, domain, v)
}
if v := uuid.ID(); v != id {
t.Errorf("%s: %s: expected id %d, got %d", name, uuid, id, v)
}
}
func TestDCE(t *testing.T) {
uuid, err := NewDCESecurity(42, 12345678)
testDCE(t, "NewDCESecurity", uuid, err, 42, 12345678)
uuid, err = NewDCEPerson()
testDCE(t, "NewDCEPerson", uuid, err, Person, uint32(os.Getuid()))
uuid, err = NewDCEGroup()
testDCE(t, "NewDCEGroup", uuid, err, Group, uint32(os.Getgid()))
}
type badRand struct{}
func (r badRand) Read(buf []byte) (int, error) {
for i, _ := range buf {
buf[i] = byte(i)
}
return len(buf), nil
}
func TestBadRand(t *testing.T) {
SetRand(badRand{})
uuid1 := New()
uuid2 := New()
if uuid1 != uuid2 {
t.Errorf("execpted duplicates, got %q and %q", uuid1, uuid2)
}
SetRand(nil)
uuid1 = New()
uuid2 = New()
if uuid1 == uuid2 {
t.Errorf("unexecpted duplicates, got %q", uuid1)
}
}
var asString = "f47ac10b-58cc-0372-8567-0e02b2c3d479"
var asBytes = []byte(asString)
func BenchmarkParse(b *testing.B) {
for i := 0; i < b.N; i++ {
_, err := Parse(asString)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkParseBytes(b *testing.B) {
for i := 0; i < b.N; i++ {
_, err := ParseBytes(asBytes)
if err != nil {
b.Fatal(err)
}
}
}
// parseBytesUnsafe is to benchmark using unsafe.
func parseBytesUnsafe(b []byte) (UUID, error) {
return Parse(*(*string)(unsafe.Pointer(&b)))
}
func BenchmarkParseBytesUnsafe(b *testing.B) {
for i := 0; i < b.N; i++ {
_, err := parseBytesUnsafe(asBytes)
if err != nil {
b.Fatal(err)
}
}
}
// parseBytesCopy is to benchmark not using unsafe.
func parseBytesCopy(b []byte) (UUID, error) {
return Parse(string(b))
}
func BenchmarkParseBytesCopy(b *testing.B) {
for i := 0; i < b.N; i++ {
_, err := parseBytesCopy(asBytes)
if err != nil {
b.Fatal(err)
}
}
}
func BenchmarkNew(b *testing.B) {
for i := 0; i < b.N; i++ {
New()
}
}
func BenchmarkUUID_String(b *testing.B) {
uuid, err := Parse("f47ac10b-58cc-0372-8567-0e02b2c3d479")
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
if uuid.String() == "" {
b.Fatal("invalid uuid")
}
}
}
func BenchmarkUUID_URN(b *testing.B) {
uuid, err := Parse("f47ac10b-58cc-0372-8567-0e02b2c3d479")
if err != nil {
b.Fatal(err)
}
for i := 0; i < b.N; i++ {
if uuid.URN() == "" {
b.Fatal("invalid uuid")
}
}
}

44
vendor/github.com/google/uuid/version1.go generated vendored Normal file
View File

@@ -0,0 +1,44 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import (
"encoding/binary"
)
// NewUUID returns a Version 1 UUID based on the current NodeID and clock
// sequence, and the current time. If the NodeID has not been set by SetNodeID
// or SetNodeInterface then it will be set automatically. If the NodeID cannot
// be set NewUUID returns nil. If clock sequence has not been set by
// SetClockSequence then it will be set automatically. If GetTime fails to
// return the current NewUUID returns Nil and an error.
//
// In most cases, New should be used.
func NewUUID() (UUID, error) {
nodeMu.Lock()
if nodeID == zeroID {
setNodeInterface("")
}
nodeMu.Unlock()
var uuid UUID
now, seq, err := GetTime()
if err != nil {
return uuid, err
}
timeLow := uint32(now & 0xffffffff)
timeMid := uint16((now >> 32) & 0xffff)
timeHi := uint16((now >> 48) & 0x0fff)
timeHi |= 0x1000 // Version 1
binary.BigEndian.PutUint32(uuid[0:], timeLow)
binary.BigEndian.PutUint16(uuid[4:], timeMid)
binary.BigEndian.PutUint16(uuid[6:], timeHi)
binary.BigEndian.PutUint16(uuid[8:], seq)
copy(uuid[10:], nodeID[:])
return uuid, nil
}

38
vendor/github.com/google/uuid/version4.go generated vendored Normal file
View File

@@ -0,0 +1,38 @@
// Copyright 2016 Google Inc. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package uuid
import "io"
// New is creates a new random UUID or panics. New is equivalent to
// the expression
//
// uuid.Must(uuid.NewRandom())
func New() UUID {
return Must(NewRandom())
}
// NewRandom returns a Random (Version 4) UUID or panics.
//
// The strength of the UUIDs is based on the strength of the crypto/rand
// package.
//
// A note about uniqueness derived from from the UUID Wikipedia entry:
//
// Randomly generated UUIDs have 122 random bits. One's annual risk of being
// hit by a meteorite is estimated to be one chance in 17 billion, that
// means the probability is about 0.00000000006 (6 × 10−11),
// equivalent to the odds of creating a few tens of trillions of UUIDs in a
// year and having one duplicate.
func NewRandom() (UUID, error) {
var uuid UUID
_, err := io.ReadFull(rander, uuid[:])
if err != nil {
return Nil, err
}
uuid[6] = (uuid[6] & 0x0f) | 0x40 // Version 4
uuid[8] = (uuid[8] & 0x3f) | 0x80 // Variant is 10
return uuid, nil
}