mirror of
https://github.com/ceph/ceph-csi.git
synced 2024-12-21 12:30:24 +00:00
358 lines
10 KiB
Go
358 lines
10 KiB
Go
// Go support for Protocol Buffers - Google's data interchange format
|
|
//
|
|
// Copyright 2012 The Go Authors. All rights reserved.
|
|
// https://github.com/golang/protobuf
|
|
//
|
|
// 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.
|
|
|
|
// +build purego appengine js
|
|
|
|
// This file contains an implementation of proto field accesses using package reflect.
|
|
// It is slower than the code in pointer_unsafe.go but it avoids package unsafe and can
|
|
// be used on App Engine.
|
|
|
|
package proto
|
|
|
|
import (
|
|
"reflect"
|
|
"sync"
|
|
)
|
|
|
|
const unsafeAllowed = false
|
|
|
|
// A field identifies a field in a struct, accessible from a pointer.
|
|
// In this implementation, a field is identified by the sequence of field indices
|
|
// passed to reflect's FieldByIndex.
|
|
type field []int
|
|
|
|
// toField returns a field equivalent to the given reflect field.
|
|
func toField(f *reflect.StructField) field {
|
|
return f.Index
|
|
}
|
|
|
|
// invalidField is an invalid field identifier.
|
|
var invalidField = field(nil)
|
|
|
|
// zeroField is a noop when calling pointer.offset.
|
|
var zeroField = field([]int{})
|
|
|
|
// IsValid reports whether the field identifier is valid.
|
|
func (f field) IsValid() bool { return f != nil }
|
|
|
|
// The pointer type is for the table-driven decoder.
|
|
// The implementation here uses a reflect.Value of pointer type to
|
|
// create a generic pointer. In pointer_unsafe.go we use unsafe
|
|
// instead of reflect to implement the same (but faster) interface.
|
|
type pointer struct {
|
|
v reflect.Value
|
|
}
|
|
|
|
// toPointer converts an interface of pointer type to a pointer
|
|
// that points to the same target.
|
|
func toPointer(i *Message) pointer {
|
|
return pointer{v: reflect.ValueOf(*i)}
|
|
}
|
|
|
|
// toAddrPointer converts an interface to a pointer that points to
|
|
// the interface data.
|
|
func toAddrPointer(i *interface{}, isptr bool) pointer {
|
|
v := reflect.ValueOf(*i)
|
|
u := reflect.New(v.Type())
|
|
u.Elem().Set(v)
|
|
return pointer{v: u}
|
|
}
|
|
|
|
// valToPointer converts v to a pointer. v must be of pointer type.
|
|
func valToPointer(v reflect.Value) pointer {
|
|
return pointer{v: v}
|
|
}
|
|
|
|
// offset converts from a pointer to a structure to a pointer to
|
|
// one of its fields.
|
|
func (p pointer) offset(f field) pointer {
|
|
return pointer{v: p.v.Elem().FieldByIndex(f).Addr()}
|
|
}
|
|
|
|
func (p pointer) isNil() bool {
|
|
return p.v.IsNil()
|
|
}
|
|
|
|
// grow updates the slice s in place to make it one element longer.
|
|
// s must be addressable.
|
|
// Returns the (addressable) new element.
|
|
func grow(s reflect.Value) reflect.Value {
|
|
n, m := s.Len(), s.Cap()
|
|
if n < m {
|
|
s.SetLen(n + 1)
|
|
} else {
|
|
s.Set(reflect.Append(s, reflect.Zero(s.Type().Elem())))
|
|
}
|
|
return s.Index(n)
|
|
}
|
|
|
|
func (p pointer) toInt64() *int64 {
|
|
return p.v.Interface().(*int64)
|
|
}
|
|
func (p pointer) toInt64Ptr() **int64 {
|
|
return p.v.Interface().(**int64)
|
|
}
|
|
func (p pointer) toInt64Slice() *[]int64 {
|
|
return p.v.Interface().(*[]int64)
|
|
}
|
|
|
|
var int32ptr = reflect.TypeOf((*int32)(nil))
|
|
|
|
func (p pointer) toInt32() *int32 {
|
|
return p.v.Convert(int32ptr).Interface().(*int32)
|
|
}
|
|
|
|
// The toInt32Ptr/Slice methods don't work because of enums.
|
|
// Instead, we must use set/get methods for the int32ptr/slice case.
|
|
/*
|
|
func (p pointer) toInt32Ptr() **int32 {
|
|
return p.v.Interface().(**int32)
|
|
}
|
|
func (p pointer) toInt32Slice() *[]int32 {
|
|
return p.v.Interface().(*[]int32)
|
|
}
|
|
*/
|
|
func (p pointer) getInt32Ptr() *int32 {
|
|
if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
|
|
// raw int32 type
|
|
return p.v.Elem().Interface().(*int32)
|
|
}
|
|
// an enum
|
|
return p.v.Elem().Convert(int32PtrType).Interface().(*int32)
|
|
}
|
|
func (p pointer) setInt32Ptr(v int32) {
|
|
// Allocate value in a *int32. Possibly convert that to a *enum.
|
|
// Then assign it to a **int32 or **enum.
|
|
// Note: we can convert *int32 to *enum, but we can't convert
|
|
// **int32 to **enum!
|
|
p.v.Elem().Set(reflect.ValueOf(&v).Convert(p.v.Type().Elem()))
|
|
}
|
|
|
|
// getInt32Slice copies []int32 from p as a new slice.
|
|
// This behavior differs from the implementation in pointer_unsafe.go.
|
|
func (p pointer) getInt32Slice() []int32 {
|
|
if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
|
|
// raw int32 type
|
|
return p.v.Elem().Interface().([]int32)
|
|
}
|
|
// an enum
|
|
// Allocate a []int32, then assign []enum's values into it.
|
|
// Note: we can't convert []enum to []int32.
|
|
slice := p.v.Elem()
|
|
s := make([]int32, slice.Len())
|
|
for i := 0; i < slice.Len(); i++ {
|
|
s[i] = int32(slice.Index(i).Int())
|
|
}
|
|
return s
|
|
}
|
|
|
|
// setInt32Slice copies []int32 into p as a new slice.
|
|
// This behavior differs from the implementation in pointer_unsafe.go.
|
|
func (p pointer) setInt32Slice(v []int32) {
|
|
if p.v.Type().Elem().Elem() == reflect.TypeOf(int32(0)) {
|
|
// raw int32 type
|
|
p.v.Elem().Set(reflect.ValueOf(v))
|
|
return
|
|
}
|
|
// an enum
|
|
// Allocate a []enum, then assign []int32's values into it.
|
|
// Note: we can't convert []enum to []int32.
|
|
slice := reflect.MakeSlice(p.v.Type().Elem(), len(v), cap(v))
|
|
for i, x := range v {
|
|
slice.Index(i).SetInt(int64(x))
|
|
}
|
|
p.v.Elem().Set(slice)
|
|
}
|
|
func (p pointer) appendInt32Slice(v int32) {
|
|
grow(p.v.Elem()).SetInt(int64(v))
|
|
}
|
|
|
|
func (p pointer) toUint64() *uint64 {
|
|
return p.v.Interface().(*uint64)
|
|
}
|
|
func (p pointer) toUint64Ptr() **uint64 {
|
|
return p.v.Interface().(**uint64)
|
|
}
|
|
func (p pointer) toUint64Slice() *[]uint64 {
|
|
return p.v.Interface().(*[]uint64)
|
|
}
|
|
func (p pointer) toUint32() *uint32 {
|
|
return p.v.Interface().(*uint32)
|
|
}
|
|
func (p pointer) toUint32Ptr() **uint32 {
|
|
return p.v.Interface().(**uint32)
|
|
}
|
|
func (p pointer) toUint32Slice() *[]uint32 {
|
|
return p.v.Interface().(*[]uint32)
|
|
}
|
|
func (p pointer) toBool() *bool {
|
|
return p.v.Interface().(*bool)
|
|
}
|
|
func (p pointer) toBoolPtr() **bool {
|
|
return p.v.Interface().(**bool)
|
|
}
|
|
func (p pointer) toBoolSlice() *[]bool {
|
|
return p.v.Interface().(*[]bool)
|
|
}
|
|
func (p pointer) toFloat64() *float64 {
|
|
return p.v.Interface().(*float64)
|
|
}
|
|
func (p pointer) toFloat64Ptr() **float64 {
|
|
return p.v.Interface().(**float64)
|
|
}
|
|
func (p pointer) toFloat64Slice() *[]float64 {
|
|
return p.v.Interface().(*[]float64)
|
|
}
|
|
func (p pointer) toFloat32() *float32 {
|
|
return p.v.Interface().(*float32)
|
|
}
|
|
func (p pointer) toFloat32Ptr() **float32 {
|
|
return p.v.Interface().(**float32)
|
|
}
|
|
func (p pointer) toFloat32Slice() *[]float32 {
|
|
return p.v.Interface().(*[]float32)
|
|
}
|
|
func (p pointer) toString() *string {
|
|
return p.v.Interface().(*string)
|
|
}
|
|
func (p pointer) toStringPtr() **string {
|
|
return p.v.Interface().(**string)
|
|
}
|
|
func (p pointer) toStringSlice() *[]string {
|
|
return p.v.Interface().(*[]string)
|
|
}
|
|
func (p pointer) toBytes() *[]byte {
|
|
return p.v.Interface().(*[]byte)
|
|
}
|
|
func (p pointer) toBytesSlice() *[][]byte {
|
|
return p.v.Interface().(*[][]byte)
|
|
}
|
|
func (p pointer) toExtensions() *XXX_InternalExtensions {
|
|
return p.v.Interface().(*XXX_InternalExtensions)
|
|
}
|
|
func (p pointer) toOldExtensions() *map[int32]Extension {
|
|
return p.v.Interface().(*map[int32]Extension)
|
|
}
|
|
func (p pointer) getPointer() pointer {
|
|
return pointer{v: p.v.Elem()}
|
|
}
|
|
func (p pointer) setPointer(q pointer) {
|
|
p.v.Elem().Set(q.v)
|
|
}
|
|
func (p pointer) appendPointer(q pointer) {
|
|
grow(p.v.Elem()).Set(q.v)
|
|
}
|
|
|
|
// getPointerSlice copies []*T from p as a new []pointer.
|
|
// This behavior differs from the implementation in pointer_unsafe.go.
|
|
func (p pointer) getPointerSlice() []pointer {
|
|
if p.v.IsNil() {
|
|
return nil
|
|
}
|
|
n := p.v.Elem().Len()
|
|
s := make([]pointer, n)
|
|
for i := 0; i < n; i++ {
|
|
s[i] = pointer{v: p.v.Elem().Index(i)}
|
|
}
|
|
return s
|
|
}
|
|
|
|
// setPointerSlice copies []pointer into p as a new []*T.
|
|
// This behavior differs from the implementation in pointer_unsafe.go.
|
|
func (p pointer) setPointerSlice(v []pointer) {
|
|
if v == nil {
|
|
p.v.Elem().Set(reflect.New(p.v.Elem().Type()).Elem())
|
|
return
|
|
}
|
|
s := reflect.MakeSlice(p.v.Elem().Type(), 0, len(v))
|
|
for _, p := range v {
|
|
s = reflect.Append(s, p.v)
|
|
}
|
|
p.v.Elem().Set(s)
|
|
}
|
|
|
|
// getInterfacePointer returns a pointer that points to the
|
|
// interface data of the interface pointed by p.
|
|
func (p pointer) getInterfacePointer() pointer {
|
|
if p.v.Elem().IsNil() {
|
|
return pointer{v: p.v.Elem()}
|
|
}
|
|
return pointer{v: p.v.Elem().Elem().Elem().Field(0).Addr()} // *interface -> interface -> *struct -> struct
|
|
}
|
|
|
|
func (p pointer) asPointerTo(t reflect.Type) reflect.Value {
|
|
// TODO: check that p.v.Type().Elem() == t?
|
|
return p.v
|
|
}
|
|
|
|
func atomicLoadUnmarshalInfo(p **unmarshalInfo) *unmarshalInfo {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
return *p
|
|
}
|
|
func atomicStoreUnmarshalInfo(p **unmarshalInfo, v *unmarshalInfo) {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
*p = v
|
|
}
|
|
func atomicLoadMarshalInfo(p **marshalInfo) *marshalInfo {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
return *p
|
|
}
|
|
func atomicStoreMarshalInfo(p **marshalInfo, v *marshalInfo) {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
*p = v
|
|
}
|
|
func atomicLoadMergeInfo(p **mergeInfo) *mergeInfo {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
return *p
|
|
}
|
|
func atomicStoreMergeInfo(p **mergeInfo, v *mergeInfo) {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
*p = v
|
|
}
|
|
func atomicLoadDiscardInfo(p **discardInfo) *discardInfo {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
return *p
|
|
}
|
|
func atomicStoreDiscardInfo(p **discardInfo, v *discardInfo) {
|
|
atomicLock.Lock()
|
|
defer atomicLock.Unlock()
|
|
*p = v
|
|
}
|
|
|
|
var atomicLock sync.Mutex
|