VOL-1967 move api-server to separate repository
Current with voltha-go acf0adaf2d91ae72b55192cc8a939e0485918d16
Change-Id: I000ea6be0789e20c922bd671562b58a7120892ae
diff --git a/vendor/github.com/google/btree/.travis.yml b/vendor/github.com/google/btree/.travis.yml
new file mode 100644
index 0000000..4f2ee4d
--- /dev/null
+++ b/vendor/github.com/google/btree/.travis.yml
@@ -0,0 +1 @@
+language: go
diff --git a/vendor/github.com/google/btree/LICENSE b/vendor/github.com/google/btree/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/vendor/github.com/google/btree/LICENSE
@@ -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.
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diff --git a/vendor/github.com/google/btree/README.md b/vendor/github.com/google/btree/README.md
new file mode 100644
index 0000000..6062a4d
--- /dev/null
+++ b/vendor/github.com/google/btree/README.md
@@ -0,0 +1,12 @@
+# BTree implementation for Go
+
+
+
+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.
diff --git a/vendor/github.com/google/btree/btree.go b/vendor/github.com/google/btree/btree.go
new file mode 100644
index 0000000..6ff062f
--- /dev/null
+++ b/vendor/github.com/google/btree/btree.go
@@ -0,0 +1,890 @@
+// 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
+}
+
+// freeNode adds the given node to the list, returning true if it was added
+// and false if it was discarded.
+func (f *FreeList) freeNode(n *node) (out bool) {
+ f.mu.Lock()
+ if len(f.freelist) < cap(f.freelist) {
+ f.freelist = append(f.freelist, n)
+ out = true
+ }
+ f.mu.Unlock()
+ return
+}
+
+// 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: ©OnWriteContext{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, found bool
+ var index int
+ switch dir {
+ case ascend:
+ if start != nil {
+ index, _ = n.items.find(start)
+ }
+ for i := index; i < len(n.items); i++ {
+ 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:
+ if start != nil {
+ index, found = n.items.find(start)
+ if !found {
+ index = index - 1
+ }
+ } else {
+ index = len(n.items) - 1
+ }
+ for i := index; 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
+}
+
+type freeType int
+
+const (
+ ftFreelistFull freeType = iota // node was freed (available for GC, not stored in freelist)
+ ftStored // node was stored in the freelist for later use
+ ftNotOwned // node was ignored by COW, since it's owned by another one
+)
+
+// freeNode frees a node within a given COW context, if it's owned by that
+// context. It returns what happened to the node (see freeType const
+// documentation).
+func (c *copyOnWriteContext) freeNode(n *node) freeType {
+ if n.cow == c {
+ // clear to allow GC
+ n.items.truncate(0)
+ n.children.truncate(0)
+ n.cow = nil
+ if c.freelist.freeNode(n) {
+ return ftStored
+ } else {
+ return ftFreelistFull
+ }
+ } else {
+ return ftNotOwned
+ }
+}
+
+// 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
+}
+
+// Clear removes all items from the btree. If addNodesToFreelist is true,
+// t's nodes are added to its freelist as part of this call, until the freelist
+// is full. Otherwise, the root node is simply dereferenced and the subtree
+// left to Go's normal GC processes.
+//
+// This can be much faster
+// than calling Delete on all elements, because that requires finding/removing
+// each element in the tree and updating the tree accordingly. It also is
+// somewhat faster than creating a new tree to replace the old one, because
+// nodes from the old tree are reclaimed into the freelist for use by the new
+// one, instead of being lost to the garbage collector.
+//
+// This call takes:
+// O(1): when addNodesToFreelist is false, this is a single operation.
+// O(1): when the freelist is already full, it breaks out immediately
+// O(freelist size): when the freelist is empty and the nodes are all owned
+// by this tree, nodes are added to the freelist until full.
+// O(tree size): when all nodes are owned by another tree, all nodes are
+// iterated over looking for nodes to add to the freelist, and due to
+// ownership, none are.
+func (t *BTree) Clear(addNodesToFreelist bool) {
+ if t.root != nil && addNodesToFreelist {
+ t.root.reset(t.cow)
+ }
+ t.root, t.length = nil, 0
+}
+
+// reset returns a subtree to the freelist. It breaks out immediately if the
+// freelist is full, since the only benefit of iterating is to fill that
+// freelist up. Returns true if parent reset call should continue.
+func (n *node) reset(c *copyOnWriteContext) bool {
+ for _, child := range n.children {
+ if !child.reset(c) {
+ return false
+ }
+ }
+ return c.freeNode(n) != ftFreelistFull
+}
+
+// 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)
+}
diff --git a/vendor/github.com/google/btree/btree_mem.go b/vendor/github.com/google/btree/btree_mem.go
new file mode 100644
index 0000000..cb95b7f
--- /dev/null
+++ b/vendor/github.com/google/btree/btree_mem.go
@@ -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")
+ }
+}
diff --git a/vendor/github.com/google/gofuzz/.travis.yml b/vendor/github.com/google/gofuzz/.travis.yml
new file mode 100644
index 0000000..f8684d9
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/.travis.yml
@@ -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
diff --git a/vendor/github.com/google/gofuzz/CONTRIBUTING.md b/vendor/github.com/google/gofuzz/CONTRIBUTING.md
new file mode 100644
index 0000000..51cf5cd
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/CONTRIBUTING.md
@@ -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
diff --git a/vendor/github.com/google/gofuzz/LICENSE b/vendor/github.com/google/gofuzz/LICENSE
new file mode 100644
index 0000000..d645695
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/LICENSE
@@ -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
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+
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+ (except as stated in this section) patent license to make, have made,
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+ where such license applies only to those patent claims licensable
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+ 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
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+ attribution notices from the Source form of the Work,
+ excluding those notices that do not pertain to any part of
+ the Derivative Works; and
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+ (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
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+ 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
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+ 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
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+ other commercial damages or losses), even if such Contributor
+ has been advised of the possibility of such damages.
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+ 9. Accepting Warranty or Additional Liability. While redistributing
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+ 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.
diff --git a/vendor/github.com/google/gofuzz/README.md b/vendor/github.com/google/gofuzz/README.md
new file mode 100644
index 0000000..64869af
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/README.md
@@ -0,0 +1,71 @@
+gofuzz
+======
+
+gofuzz is a library for populating go objects with random values.
+
+[](https://godoc.org/github.com/google/gofuzz)
+[](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!
diff --git a/vendor/github.com/google/gofuzz/doc.go b/vendor/github.com/google/gofuzz/doc.go
new file mode 100644
index 0000000..9f9956d
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/doc.go
@@ -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
diff --git a/vendor/github.com/google/gofuzz/fuzz.go b/vendor/github.com/google/gofuzz/fuzz.go
new file mode 100644
index 0000000..1dfa80a
--- /dev/null
+++ b/vendor/github.com/google/gofuzz/fuzz.go
@@ -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())
+}
diff --git a/vendor/github.com/google/uuid/.travis.yml b/vendor/github.com/google/uuid/.travis.yml
new file mode 100644
index 0000000..d8156a6
--- /dev/null
+++ b/vendor/github.com/google/uuid/.travis.yml
@@ -0,0 +1,9 @@
+language: go
+
+go:
+ - 1.4.3
+ - 1.5.3
+ - tip
+
+script:
+ - go test -v ./...
diff --git a/vendor/github.com/google/uuid/CONTRIBUTING.md b/vendor/github.com/google/uuid/CONTRIBUTING.md
new file mode 100644
index 0000000..04fdf09
--- /dev/null
+++ b/vendor/github.com/google/uuid/CONTRIBUTING.md
@@ -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.
diff --git a/vendor/github.com/google/uuid/CONTRIBUTORS b/vendor/github.com/google/uuid/CONTRIBUTORS
new file mode 100644
index 0000000..b4bb97f
--- /dev/null
+++ b/vendor/github.com/google/uuid/CONTRIBUTORS
@@ -0,0 +1,9 @@
+Paul Borman <borman@google.com>
+bmatsuo
+shawnps
+theory
+jboverfelt
+dsymonds
+cd1
+wallclockbuilder
+dansouza
diff --git a/vendor/github.com/google/uuid/LICENSE b/vendor/github.com/google/uuid/LICENSE
new file mode 100644
index 0000000..5dc6826
--- /dev/null
+++ b/vendor/github.com/google/uuid/LICENSE
@@ -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.
diff --git a/vendor/github.com/google/uuid/README.md b/vendor/github.com/google/uuid/README.md
new file mode 100644
index 0000000..9d92c11
--- /dev/null
+++ b/vendor/github.com/google/uuid/README.md
@@ -0,0 +1,19 @@
+# uuid 
+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
+[](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
diff --git a/vendor/github.com/google/uuid/dce.go b/vendor/github.com/google/uuid/dce.go
new file mode 100644
index 0000000..fa820b9
--- /dev/null
+++ b/vendor/github.com/google/uuid/dce.go
@@ -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.
+//
+// NewDCESecurity(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.
+//
+// NewDCESecurity(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))
+}
diff --git a/vendor/github.com/google/uuid/doc.go b/vendor/github.com/google/uuid/doc.go
new file mode 100644
index 0000000..5b8a4b9
--- /dev/null
+++ b/vendor/github.com/google/uuid/doc.go
@@ -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
diff --git a/vendor/github.com/google/uuid/go.mod b/vendor/github.com/google/uuid/go.mod
new file mode 100644
index 0000000..fc84cd7
--- /dev/null
+++ b/vendor/github.com/google/uuid/go.mod
@@ -0,0 +1 @@
+module github.com/google/uuid
diff --git a/vendor/github.com/google/uuid/hash.go b/vendor/github.com/google/uuid/hash.go
new file mode 100644
index 0000000..b174616
--- /dev/null
+++ b/vendor/github.com/google/uuid/hash.go
@@ -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(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)
+}
diff --git a/vendor/github.com/google/uuid/marshal.go b/vendor/github.com/google/uuid/marshal.go
new file mode 100644
index 0000000..7f9e0c6
--- /dev/null
+++ b/vendor/github.com/google/uuid/marshal.go
@@ -0,0 +1,37 @@
+// 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 {
+ 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
+}
diff --git a/vendor/github.com/google/uuid/node.go b/vendor/github.com/google/uuid/node.go
new file mode 100644
index 0000000..d651a2b
--- /dev/null
+++ b/vendor/github.com/google/uuid/node.go
@@ -0,0 +1,90 @@
+// 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 (
+ "sync"
+)
+
+var (
+ nodeMu sync.Mutex
+ 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 {
+ iname, addr := getHardwareInterface(name) // null implementation for js
+ if iname != "" && addr != nil {
+ ifname = iname
+ copy(nodeID[:], addr)
+ 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 == "" {
+ ifname = "random"
+ 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 {
+ var node [6]byte
+ copy(node[:], uuid[10:])
+ return node[:]
+}
diff --git a/vendor/github.com/google/uuid/node_js.go b/vendor/github.com/google/uuid/node_js.go
new file mode 100644
index 0000000..24b78ed
--- /dev/null
+++ b/vendor/github.com/google/uuid/node_js.go
@@ -0,0 +1,12 @@
+// Copyright 2017 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.
+
+// +build js
+
+package uuid
+
+// getHardwareInterface returns nil values for the JS version of the code.
+// This remvoves the "net" dependency, because it is not used in the browser.
+// Using the "net" library inflates the size of the transpiled JS code by 673k bytes.
+func getHardwareInterface(name string) (string, []byte) { return "", nil }
diff --git a/vendor/github.com/google/uuid/node_net.go b/vendor/github.com/google/uuid/node_net.go
new file mode 100644
index 0000000..0cbbcdd
--- /dev/null
+++ b/vendor/github.com/google/uuid/node_net.go
@@ -0,0 +1,33 @@
+// Copyright 2017 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.
+
+// +build !js
+
+package uuid
+
+import "net"
+
+var interfaces []net.Interface // cached list of interfaces
+
+// getHardwareInterface returns the name and hardware address of interface name.
+// If name is "" then the name and hardware address of one of the system's
+// interfaces is returned. If no interfaces are found (name does not exist or
+// there are no interfaces) then "", nil is returned.
+//
+// Only addresses of at least 6 bytes are returned.
+func getHardwareInterface(name string) (string, []byte) {
+ if interfaces == nil {
+ var err error
+ interfaces, err = net.Interfaces()
+ if err != nil {
+ return "", nil
+ }
+ }
+ for _, ifs := range interfaces {
+ if len(ifs.HardwareAddr) >= 6 && (name == "" || name == ifs.Name) {
+ return ifs.Name, ifs.HardwareAddr
+ }
+ }
+ return "", nil
+}
diff --git a/vendor/github.com/google/uuid/sql.go b/vendor/github.com/google/uuid/sql.go
new file mode 100644
index 0000000..f326b54
--- /dev/null
+++ b/vendor/github.com/google/uuid/sql.go
@@ -0,0 +1,59 @@
+// 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 := src.(type) {
+ case nil:
+ return nil
+
+ case string:
+ // if an empty UUID comes from a table, we return a null UUID
+ if src == "" {
+ return nil
+ }
+
+ // see Parse for required string format
+ u, err := Parse(src)
+ if err != nil {
+ return fmt.Errorf("Scan: %v", err)
+ }
+
+ *uuid = u
+
+ case []byte:
+ // if an empty UUID comes from a table, we return a null UUID
+ if len(src) == 0 {
+ return nil
+ }
+
+ // assumes a simple slice of bytes if 16 bytes
+ // otherwise attempts to parse
+ if len(src) != 16 {
+ return uuid.Scan(string(src))
+ }
+ copy((*uuid)[:], src)
+
+ 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
+}
diff --git a/vendor/github.com/google/uuid/time.go b/vendor/github.com/google/uuid/time.go
new file mode 100644
index 0000000..e6ef06c
--- /dev/null
+++ b/vendor/github.com/google/uuid/time.go
@@ -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)
+}
+
+// SetClockSequence 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])
+ }
+ oldSeq := clockSeq
+ clockSeq = uint16(seq&0x3fff) | 0x8000 // Set our variant
+ if oldSeq != 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
+}
diff --git a/vendor/github.com/google/uuid/util.go b/vendor/github.com/google/uuid/util.go
new file mode 100644
index 0000000..5ea6c73
--- /dev/null
+++ b/vendor/github.com/google/uuid/util.go
@@ -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
+}
diff --git a/vendor/github.com/google/uuid/uuid.go b/vendor/github.com/google/uuid/uuid.go
new file mode 100644
index 0000000..524404c
--- /dev/null
+++ b/vendor/github.com/google/uuid/uuid.go
@@ -0,0 +1,245 @@
+// Copyright 2018 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 standard UUID
+// forms of xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx and
+// urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx are decoded as well as the
+// Microsoft encoding {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} and the raw hex
+// encoding: xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx.
+func Parse(s string) (UUID, error) {
+ var uuid UUID
+ switch len(s) {
+ // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ case 36:
+
+ // urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ case 36 + 9:
+ if strings.ToLower(s[:9]) != "urn:uuid:" {
+ return uuid, fmt.Errorf("invalid urn prefix: %q", s[:9])
+ }
+ s = s[9:]
+
+ // {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
+ case 36 + 2:
+ s = s[1:]
+
+ // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+ case 32:
+ var ok bool
+ for i := range uuid {
+ uuid[i], ok = xtob(s[i*2], s[i*2+1])
+ if !ok {
+ return uuid, errors.New("invalid UUID format")
+ }
+ }
+ return uuid, nil
+ default:
+ return uuid, fmt.Errorf("invalid UUID length: %d", len(s))
+ }
+ // s is now at least 36 bytes long
+ // it must be of the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ 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} {
+ v, ok := xtob(s[x], s[x+1])
+ if !ok {
+ return uuid, errors.New("invalid UUID format")
+ }
+ 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
+ switch len(b) {
+ case 36: // xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ case 36 + 9: // urn:uuid:xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ if !bytes.Equal(bytes.ToLower(b[:9]), []byte("urn:uuid:")) {
+ return uuid, fmt.Errorf("invalid urn prefix: %q", b[:9])
+ }
+ b = b[9:]
+ case 36 + 2: // {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
+ b = b[1:]
+ case 32: // xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
+ var ok bool
+ for i := 0; i < 32; i += 2 {
+ uuid[i/2], ok = xtob(b[i], b[i+1])
+ if !ok {
+ return uuid, errors.New("invalid UUID format")
+ }
+ }
+ return uuid, nil
+ default:
+ return uuid, fmt.Errorf("invalid UUID length: %d", len(b))
+ }
+ // s is now at least 36 bytes long
+ // it must be of the form xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx
+ 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} {
+ v, ok := xtob(b[x], b[x+1])
+ if !ok {
+ return uuid, errors.New("invalid UUID format")
+ }
+ uuid[i] = v
+ }
+ return uuid, nil
+}
+
+// MustParse is like Parse but panics if the string cannot be parsed.
+// It simplifies safe initialization of global variables holding compiled UUIDs.
+func MustParse(s string) UUID {
+ uuid, err := Parse(s)
+ if err != nil {
+ panic(`uuid: Parse(` + s + `): ` + err.Error())
+ }
+ return uuid
+}
+
+// FromBytes creates a new UUID from a byte slice. Returns an error if the slice
+// does not have a length of 16. The bytes are copied from the slice.
+func FromBytes(b []byte) (uuid UUID, err error) {
+ err = uuid.UnmarshalBinary(b)
+ return uuid, err
+}
+
+// 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 implements 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
+}
diff --git a/vendor/github.com/google/uuid/version1.go b/vendor/github.com/google/uuid/version1.go
new file mode 100644
index 0000000..199a1ac
--- /dev/null
+++ b/vendor/github.com/google/uuid/version1.go
@@ -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
+}
diff --git a/vendor/github.com/google/uuid/version4.go b/vendor/github.com/google/uuid/version4.go
new file mode 100644
index 0000000..84af91c
--- /dev/null
+++ b/vendor/github.com/google/uuid/version4.go
@@ -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 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.
+//
+// The strength of the UUIDs is based on the strength of the crypto/rand
+// package.
+//
+// A note about uniqueness derived 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
+}