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authorMichael Muré <batolettre@gmail.com>2018-09-24 19:22:32 +0200
committerMichael Muré <batolettre@gmail.com>2018-09-24 19:22:32 +0200
commitc4a207622a894ba9839f1a3c47c9d78beff9b861 (patch)
tree009d80b363b5392e6eba4bec85b0ae74b3942995 /vendor/github.com/golang/protobuf/proto/pointer_reflect.go
parentc86e7231b223d532e26ab5449715c65b6b4e3fde (diff)
downloadgit-bug-c4a207622a894ba9839f1a3c47c9d78beff9b861.tar.gz
github: query most of the data
Diffstat (limited to 'vendor/github.com/golang/protobuf/proto/pointer_reflect.go')
-rw-r--r--vendor/github.com/golang/protobuf/proto/pointer_reflect.go357
1 files changed, 357 insertions, 0 deletions
diff --git a/vendor/github.com/golang/protobuf/proto/pointer_reflect.go b/vendor/github.com/golang/protobuf/proto/pointer_reflect.go
new file mode 100644
index 00000000..b6cad908
--- /dev/null
+++ b/vendor/github.com/golang/protobuf/proto/pointer_reflect.go
@@ -0,0 +1,357 @@
+// 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