mirror of
https://github.com/minio/minio.git
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2aa18cafc6
With CoreDNS now supporting etcdv3 as the DNS backend, we can update our federation target to etcdv3. Users will now be able to use etcdv3 server as the federation backbone. Minio will update bucket data to etcdv3 and CoreDNS can pick that data up and serve it as bucket style DNS path.
358 lines
10 KiB
Go
358 lines
10 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
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//
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// Copyright 2012 The Go Authors. All rights reserved.
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// https://github.com/golang/protobuf
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//
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following disclaimer
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// in the documentation and/or other materials provided with the
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// distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived from
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// this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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// +build purego appengine js
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// This file contains an implementation of proto field accesses using package reflect.
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// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
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// be used on App Engine.
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package proto
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import (
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"reflect"
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"sync"
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)
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const unsafeAllowed = false
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// A field identifies a field in a struct, accessible from a pointer.
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// In this implementation, a field is identified by the sequence of field indices
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// passed to reflect's FieldByIndex.
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type field []int
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// toField returns a field equivalent to the given reflect field.
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func toField(f *reflect.StructField) field {
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return f.Index
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}
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// invalidField is an invalid field identifier.
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var invalidField = field(nil)
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// zeroField is a noop when calling pointer.offset.
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var zeroField = field([]int{})
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// IsValid reports whether the field identifier is valid.
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func (f field) IsValid() bool { return f != nil }
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// The pointer type is for the table-driven decoder.
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// The implementation here uses a reflect.Value of pointer type to
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// create a generic pointer. In pointer_unsafe.go we use unsafe
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// instead of reflect to implement the same (but faster) interface.
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type pointer struct {
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v reflect.Value
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}
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// toPointer converts an interface of pointer type to a pointer
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// that points to the same target.
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func toPointer(i *Message) pointer {
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return pointer{v: reflect.ValueOf(*i)}
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}
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// toAddrPointer converts an interface to a pointer that points to
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// the interface data.
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func toAddrPointer(i *interface{}, isptr bool) pointer {
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v := reflect.ValueOf(*i)
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u := reflect.New(v.Type())
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u.Elem().Set(v)
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return pointer{v: u}
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}
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// valToPointer converts v to a pointer. v must be of pointer type.
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func valToPointer(v reflect.Value) pointer {
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return pointer{v: v}
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}
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// offset converts from a pointer to a structure to a pointer to
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// one of its fields.
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func (p pointer) offset(f field) pointer {
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return pointer{v: p.v.Elem().FieldByIndex(f).Addr()}
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}
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func (p pointer) isNil() bool {
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return p.v.IsNil()
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}
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// grow updates the slice s in place to make it one element longer.
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// s must be addressable.
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// Returns the (addressable) new element.
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func grow(s reflect.Value) reflect.Value {
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n, m := s.Len(), s.Cap()
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if n < m {
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s.SetLen(n + 1)
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} else {
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s.Set(reflect.Append(s, reflect.Zero(s.Type().Elem())))
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}
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return s.Index(n)
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}
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func (p pointer) toInt64() *int64 {
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return p.v.Interface().(*int64)
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}
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func (p pointer) toInt64Ptr() **int64 {
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return p.v.Interface().(**int64)
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}
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func (p pointer) toInt64Slice() *[]int64 {
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return p.v.Interface().(*[]int64)
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}
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var int32ptr = reflect.TypeOf((*int32)(nil))
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func (p pointer) toInt32() *int32 {
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return p.v.Convert(int32ptr).Interface().(*int32)
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}
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// The toInt32Ptr/Slice methods don't work because of enums.
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// Instead, we must use set/get methods for the int32ptr/slice case.
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/*
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func (p pointer) toInt32Ptr() **int32 {
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return p.v.Interface().(**int32)
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}
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func (p pointer) toInt32Slice() *[]int32 {
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return p.v.Interface().(*[]int32)
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}
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*/
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func (p pointer) getInt32Ptr() *int32 {
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if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
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// raw int32 type
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return p.v.Elem().Interface().(*int32)
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}
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// an enum
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return p.v.Elem().Convert(int32PtrType).Interface().(*int32)
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}
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func (p pointer) setInt32Ptr(v int32) {
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// Allocate value in a *int32. Possibly convert that to a *enum.
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// Then assign it to a **int32 or **enum.
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// Note: we can convert *int32 to *enum, but we can't convert
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// **int32 to **enum!
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p.v.Elem().Set(reflect.ValueOf(&v).Convert(p.v.Type().Elem()))
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}
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// getInt32Slice copies []int32 from p as a new slice.
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// This behavior differs from the implementation in pointer_unsafe.go.
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func (p pointer) getInt32Slice() []int32 {
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if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
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// raw int32 type
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return p.v.Elem().Interface().([]int32)
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}
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// an enum
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// Allocate a []int32, then assign []enum's values into it.
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// Note: we can't convert []enum to []int32.
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slice := p.v.Elem()
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s := make([]int32, slice.Len())
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for i := 0; i < slice.Len(); i++ {
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s[i] = int32(slice.Index(i).Int())
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}
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return s
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}
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// setInt32Slice copies []int32 into p as a new slice.
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// This behavior differs from the implementation in pointer_unsafe.go.
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func (p pointer) setInt32Slice(v []int32) {
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if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
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// raw int32 type
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p.v.Elem().Set(reflect.ValueOf(v))
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return
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}
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// an enum
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// Allocate a []enum, then assign []int32's values into it.
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// Note: we can't convert []enum to []int32.
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slice := reflect.MakeSlice(p.v.Type().Elem(), len(v), cap(v))
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for i, x := range v {
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slice.Index(i).SetInt(int64(x))
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}
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p.v.Elem().Set(slice)
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}
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func (p pointer) appendInt32Slice(v int32) {
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grow(p.v.Elem()).SetInt(int64(v))
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}
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func (p pointer) toUint64() *uint64 {
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return p.v.Interface().(*uint64)
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}
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func (p pointer) toUint64Ptr() **uint64 {
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return p.v.Interface().(**uint64)
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}
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func (p pointer) toUint64Slice() *[]uint64 {
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return p.v.Interface().(*[]uint64)
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}
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func (p pointer) toUint32() *uint32 {
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return p.v.Interface().(*uint32)
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}
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func (p pointer) toUint32Ptr() **uint32 {
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return p.v.Interface().(**uint32)
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}
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func (p pointer) toUint32Slice() *[]uint32 {
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return p.v.Interface().(*[]uint32)
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}
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func (p pointer) toBool() *bool {
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return p.v.Interface().(*bool)
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}
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func (p pointer) toBoolPtr() **bool {
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return p.v.Interface().(**bool)
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}
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func (p pointer) toBoolSlice() *[]bool {
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return p.v.Interface().(*[]bool)
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}
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func (p pointer) toFloat64() *float64 {
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return p.v.Interface().(*float64)
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}
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func (p pointer) toFloat64Ptr() **float64 {
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return p.v.Interface().(**float64)
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}
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func (p pointer) toFloat64Slice() *[]float64 {
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return p.v.Interface().(*[]float64)
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}
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func (p pointer) toFloat32() *float32 {
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return p.v.Interface().(*float32)
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}
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func (p pointer) toFloat32Ptr() **float32 {
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return p.v.Interface().(**float32)
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}
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func (p pointer) toFloat32Slice() *[]float32 {
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return p.v.Interface().(*[]float32)
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}
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func (p pointer) toString() *string {
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return p.v.Interface().(*string)
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}
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func (p pointer) toStringPtr() **string {
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return p.v.Interface().(**string)
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}
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func (p pointer) toStringSlice() *[]string {
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return p.v.Interface().(*[]string)
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}
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func (p pointer) toBytes() *[]byte {
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return p.v.Interface().(*[]byte)
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}
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func (p pointer) toBytesSlice() *[][]byte {
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return p.v.Interface().(*[][]byte)
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}
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func (p pointer) toExtensions() *XXX_InternalExtensions {
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return p.v.Interface().(*XXX_InternalExtensions)
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}
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func (p pointer) toOldExtensions() *map[int32]Extension {
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return p.v.Interface().(*map[int32]Extension)
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}
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func (p pointer) getPointer() pointer {
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return pointer{v: p.v.Elem()}
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}
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func (p pointer) setPointer(q pointer) {
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p.v.Elem().Set(q.v)
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}
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func (p pointer) appendPointer(q pointer) {
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grow(p.v.Elem()).Set(q.v)
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}
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// getPointerSlice copies []*T from p as a new []pointer.
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// This behavior differs from the implementation in pointer_unsafe.go.
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func (p pointer) getPointerSlice() []pointer {
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if p.v.IsNil() {
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return nil
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}
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n := p.v.Elem().Len()
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s := make([]pointer, n)
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for i := 0; i < n; i++ {
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s[i] = pointer{v: p.v.Elem().Index(i)}
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}
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return s
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}
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// setPointerSlice copies []pointer into p as a new []*T.
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// This behavior differs from the implementation in pointer_unsafe.go.
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func (p pointer) setPointerSlice(v []pointer) {
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if v == nil {
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p.v.Elem().Set(reflect.New(p.v.Elem().Type()).Elem())
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return
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}
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s := reflect.MakeSlice(p.v.Elem().Type(), 0, len(v))
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for _, p := range v {
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s = reflect.Append(s, p.v)
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}
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p.v.Elem().Set(s)
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}
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// getInterfacePointer returns a pointer that points to the
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// interface data of the interface pointed by p.
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func (p pointer) getInterfacePointer() pointer {
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if p.v.Elem().IsNil() {
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return pointer{v: p.v.Elem()}
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}
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return pointer{v: p.v.Elem().Elem().Elem().Field(0).Addr()} // *interface -> interface -> *struct -> struct
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}
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func (p pointer) asPointerTo(t reflect.Type) reflect.Value {
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// TODO: check that p.v.Type().Elem() == t?
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return p.v
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}
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func atomicLoadUnmarshalInfo(p **unmarshalInfo) *unmarshalInfo {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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return *p
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}
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func atomicStoreUnmarshalInfo(p **unmarshalInfo, v *unmarshalInfo) {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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*p = v
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}
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func atomicLoadMarshalInfo(p **marshalInfo) *marshalInfo {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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return *p
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}
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func atomicStoreMarshalInfo(p **marshalInfo, v *marshalInfo) {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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*p = v
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}
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func atomicLoadMergeInfo(p **mergeInfo) *mergeInfo {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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return *p
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}
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func atomicStoreMergeInfo(p **mergeInfo, v *mergeInfo) {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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*p = v
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}
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func atomicLoadDiscardInfo(p **discardInfo) *discardInfo {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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return *p
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}
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func atomicStoreDiscardInfo(p **discardInfo, v *discardInfo) {
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atomicLock.Lock()
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defer atomicLock.Unlock()
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*p = v
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}
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var atomicLock sync.Mutex
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