--- /dev/null
+// 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 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 (
+ "math"
+ "reflect"
+)
+
+// A structPointer is a pointer to a struct.
+type structPointer struct {
+ v reflect.Value
+}
+
+// toStructPointer returns a structPointer equivalent to the given reflect value.
+// The reflect value must itself be a pointer to a struct.
+func toStructPointer(v reflect.Value) structPointer {
+ return structPointer{v}
+}
+
+// IsNil reports whether p is nil.
+func structPointer_IsNil(p structPointer) bool {
+ return p.v.IsNil()
+}
+
+// Interface returns the struct pointer as an interface value.
+func structPointer_Interface(p structPointer, _ reflect.Type) interface{} {
+ return p.v.Interface()
+}
+
+// A field identifies a field in a struct, accessible from a structPointer.
+// 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)
+
+// IsValid reports whether the field identifier is valid.
+func (f field) IsValid() bool { return f != nil }
+
+// field returns the given field in the struct as a reflect value.
+func structPointer_field(p structPointer, f field) reflect.Value {
+ // Special case: an extension map entry with a value of type T
+ // passes a *T to the struct-handling code with a zero field,
+ // expecting that it will be treated as equivalent to *struct{ X T },
+ // which has the same memory layout. We have to handle that case
+ // specially, because reflect will panic if we call FieldByIndex on a
+ // non-struct.
+ if f == nil {
+ return p.v.Elem()
+ }
+
+ return p.v.Elem().FieldByIndex(f)
+}
+
+// ifield returns the given field in the struct as an interface value.
+func structPointer_ifield(p structPointer, f field) interface{} {
+ return structPointer_field(p, f).Addr().Interface()
+}
+
+// Bytes returns the address of a []byte field in the struct.
+func structPointer_Bytes(p structPointer, f field) *[]byte {
+ return structPointer_ifield(p, f).(*[]byte)
+}
+
+// BytesSlice returns the address of a [][]byte field in the struct.
+func structPointer_BytesSlice(p structPointer, f field) *[][]byte {
+ return structPointer_ifield(p, f).(*[][]byte)
+}
+
+// Bool returns the address of a *bool field in the struct.
+func structPointer_Bool(p structPointer, f field) **bool {
+ return structPointer_ifield(p, f).(**bool)
+}
+
+// BoolVal returns the address of a bool field in the struct.
+func structPointer_BoolVal(p structPointer, f field) *bool {
+ return structPointer_ifield(p, f).(*bool)
+}
+
+// BoolSlice returns the address of a []bool field in the struct.
+func structPointer_BoolSlice(p structPointer, f field) *[]bool {
+ return structPointer_ifield(p, f).(*[]bool)
+}
+
+// String returns the address of a *string field in the struct.
+func structPointer_String(p structPointer, f field) **string {
+ return structPointer_ifield(p, f).(**string)
+}
+
+// StringVal returns the address of a string field in the struct.
+func structPointer_StringVal(p structPointer, f field) *string {
+ return structPointer_ifield(p, f).(*string)
+}
+
+// StringSlice returns the address of a []string field in the struct.
+func structPointer_StringSlice(p structPointer, f field) *[]string {
+ return structPointer_ifield(p, f).(*[]string)
+}
+
+// Extensions returns the address of an extension map field in the struct.
+func structPointer_Extensions(p structPointer, f field) *XXX_InternalExtensions {
+ return structPointer_ifield(p, f).(*XXX_InternalExtensions)
+}
+
+// ExtMap returns the address of an extension map field in the struct.
+func structPointer_ExtMap(p structPointer, f field) *map[int32]Extension {
+ return structPointer_ifield(p, f).(*map[int32]Extension)
+}
+
+// NewAt returns the reflect.Value for a pointer to a field in the struct.
+func structPointer_NewAt(p structPointer, f field, typ reflect.Type) reflect.Value {
+ return structPointer_field(p, f).Addr()
+}
+
+// SetStructPointer writes a *struct field in the struct.
+func structPointer_SetStructPointer(p structPointer, f field, q structPointer) {
+ structPointer_field(p, f).Set(q.v)
+}
+
+// GetStructPointer reads a *struct field in the struct.
+func structPointer_GetStructPointer(p structPointer, f field) structPointer {
+ return structPointer{structPointer_field(p, f)}
+}
+
+// StructPointerSlice the address of a []*struct field in the struct.
+func structPointer_StructPointerSlice(p structPointer, f field) structPointerSlice {
+ return structPointerSlice{structPointer_field(p, f)}
+}
+
+// A structPointerSlice represents the address of a slice of pointers to structs
+// (themselves messages or groups). That is, v.Type() is *[]*struct{...}.
+type structPointerSlice struct {
+ v reflect.Value
+}
+
+func (p structPointerSlice) Len() int { return p.v.Len() }
+func (p structPointerSlice) Index(i int) structPointer { return structPointer{p.v.Index(i)} }
+func (p structPointerSlice) Append(q structPointer) {
+ p.v.Set(reflect.Append(p.v, q.v))
+}
+
+var (
+ int32Type = reflect.TypeOf(int32(0))
+ uint32Type = reflect.TypeOf(uint32(0))
+ float32Type = reflect.TypeOf(float32(0))
+ int64Type = reflect.TypeOf(int64(0))
+ uint64Type = reflect.TypeOf(uint64(0))
+ float64Type = reflect.TypeOf(float64(0))
+)
+
+// A word32 represents a field of type *int32, *uint32, *float32, or *enum.
+// That is, v.Type() is *int32, *uint32, *float32, or *enum and v is assignable.
+type word32 struct {
+ v reflect.Value
+}
+
+// IsNil reports whether p is nil.
+func word32_IsNil(p word32) bool {
+ return p.v.IsNil()
+}
+
+// Set sets p to point at a newly allocated word with bits set to x.
+func word32_Set(p word32, o *Buffer, x uint32) {
+ t := p.v.Type().Elem()
+ switch t {
+ case int32Type:
+ if len(o.int32s) == 0 {
+ o.int32s = make([]int32, uint32PoolSize)
+ }
+ o.int32s[0] = int32(x)
+ p.v.Set(reflect.ValueOf(&o.int32s[0]))
+ o.int32s = o.int32s[1:]
+ return
+ case uint32Type:
+ if len(o.uint32s) == 0 {
+ o.uint32s = make([]uint32, uint32PoolSize)
+ }
+ o.uint32s[0] = x
+ p.v.Set(reflect.ValueOf(&o.uint32s[0]))
+ o.uint32s = o.uint32s[1:]
+ return
+ case float32Type:
+ if len(o.float32s) == 0 {
+ o.float32s = make([]float32, uint32PoolSize)
+ }
+ o.float32s[0] = math.Float32frombits(x)
+ p.v.Set(reflect.ValueOf(&o.float32s[0]))
+ o.float32s = o.float32s[1:]
+ return
+ }
+
+ // must be enum
+ p.v.Set(reflect.New(t))
+ p.v.Elem().SetInt(int64(int32(x)))
+}
+
+// Get gets the bits pointed at by p, as a uint32.
+func word32_Get(p word32) uint32 {
+ elem := p.v.Elem()
+ switch elem.Kind() {
+ case reflect.Int32:
+ return uint32(elem.Int())
+ case reflect.Uint32:
+ return uint32(elem.Uint())
+ case reflect.Float32:
+ return math.Float32bits(float32(elem.Float()))
+ }
+ panic("unreachable")
+}
+
+// Word32 returns a reference to a *int32, *uint32, *float32, or *enum field in the struct.
+func structPointer_Word32(p structPointer, f field) word32 {
+ return word32{structPointer_field(p, f)}
+}
+
+// A word32Val represents a field of type int32, uint32, float32, or enum.
+// That is, v.Type() is int32, uint32, float32, or enum and v is assignable.
+type word32Val struct {
+ v reflect.Value
+}
+
+// Set sets *p to x.
+func word32Val_Set(p word32Val, x uint32) {
+ switch p.v.Type() {
+ case int32Type:
+ p.v.SetInt(int64(x))
+ return
+ case uint32Type:
+ p.v.SetUint(uint64(x))
+ return
+ case float32Type:
+ p.v.SetFloat(float64(math.Float32frombits(x)))
+ return
+ }
+
+ // must be enum
+ p.v.SetInt(int64(int32(x)))
+}
+
+// Get gets the bits pointed at by p, as a uint32.
+func word32Val_Get(p word32Val) uint32 {
+ elem := p.v
+ switch elem.Kind() {
+ case reflect.Int32:
+ return uint32(elem.Int())
+ case reflect.Uint32:
+ return uint32(elem.Uint())
+ case reflect.Float32:
+ return math.Float32bits(float32(elem.Float()))
+ }
+ panic("unreachable")
+}
+
+// Word32Val returns a reference to a int32, uint32, float32, or enum field in the struct.
+func structPointer_Word32Val(p structPointer, f field) word32Val {
+ return word32Val{structPointer_field(p, f)}
+}
+
+// A word32Slice is a slice of 32-bit values.
+// That is, v.Type() is []int32, []uint32, []float32, or []enum.
+type word32Slice struct {
+ v reflect.Value
+}
+
+func (p word32Slice) Append(x uint32) {
+ n, m := p.v.Len(), p.v.Cap()
+ if n < m {
+ p.v.SetLen(n + 1)
+ } else {
+ t := p.v.Type().Elem()
+ p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+ }
+ elem := p.v.Index(n)
+ switch elem.Kind() {
+ case reflect.Int32:
+ elem.SetInt(int64(int32(x)))
+ case reflect.Uint32:
+ elem.SetUint(uint64(x))
+ case reflect.Float32:
+ elem.SetFloat(float64(math.Float32frombits(x)))
+ }
+}
+
+func (p word32Slice) Len() int {
+ return p.v.Len()
+}
+
+func (p word32Slice) Index(i int) uint32 {
+ elem := p.v.Index(i)
+ switch elem.Kind() {
+ case reflect.Int32:
+ return uint32(elem.Int())
+ case reflect.Uint32:
+ return uint32(elem.Uint())
+ case reflect.Float32:
+ return math.Float32bits(float32(elem.Float()))
+ }
+ panic("unreachable")
+}
+
+// Word32Slice returns a reference to a []int32, []uint32, []float32, or []enum field in the struct.
+func structPointer_Word32Slice(p structPointer, f field) word32Slice {
+ return word32Slice{structPointer_field(p, f)}
+}
+
+// word64 is like word32 but for 64-bit values.
+type word64 struct {
+ v reflect.Value
+}
+
+func word64_Set(p word64, o *Buffer, x uint64) {
+ t := p.v.Type().Elem()
+ switch t {
+ case int64Type:
+ if len(o.int64s) == 0 {
+ o.int64s = make([]int64, uint64PoolSize)
+ }
+ o.int64s[0] = int64(x)
+ p.v.Set(reflect.ValueOf(&o.int64s[0]))
+ o.int64s = o.int64s[1:]
+ return
+ case uint64Type:
+ if len(o.uint64s) == 0 {
+ o.uint64s = make([]uint64, uint64PoolSize)
+ }
+ o.uint64s[0] = x
+ p.v.Set(reflect.ValueOf(&o.uint64s[0]))
+ o.uint64s = o.uint64s[1:]
+ return
+ case float64Type:
+ if len(o.float64s) == 0 {
+ o.float64s = make([]float64, uint64PoolSize)
+ }
+ o.float64s[0] = math.Float64frombits(x)
+ p.v.Set(reflect.ValueOf(&o.float64s[0]))
+ o.float64s = o.float64s[1:]
+ return
+ }
+ panic("unreachable")
+}
+
+func word64_IsNil(p word64) bool {
+ return p.v.IsNil()
+}
+
+func word64_Get(p word64) uint64 {
+ elem := p.v.Elem()
+ switch elem.Kind() {
+ case reflect.Int64:
+ return uint64(elem.Int())
+ case reflect.Uint64:
+ return elem.Uint()
+ case reflect.Float64:
+ return math.Float64bits(elem.Float())
+ }
+ panic("unreachable")
+}
+
+func structPointer_Word64(p structPointer, f field) word64 {
+ return word64{structPointer_field(p, f)}
+}
+
+// word64Val is like word32Val but for 64-bit values.
+type word64Val struct {
+ v reflect.Value
+}
+
+func word64Val_Set(p word64Val, o *Buffer, x uint64) {
+ switch p.v.Type() {
+ case int64Type:
+ p.v.SetInt(int64(x))
+ return
+ case uint64Type:
+ p.v.SetUint(x)
+ return
+ case float64Type:
+ p.v.SetFloat(math.Float64frombits(x))
+ return
+ }
+ panic("unreachable")
+}
+
+func word64Val_Get(p word64Val) uint64 {
+ elem := p.v
+ switch elem.Kind() {
+ case reflect.Int64:
+ return uint64(elem.Int())
+ case reflect.Uint64:
+ return elem.Uint()
+ case reflect.Float64:
+ return math.Float64bits(elem.Float())
+ }
+ panic("unreachable")
+}
+
+func structPointer_Word64Val(p structPointer, f field) word64Val {
+ return word64Val{structPointer_field(p, f)}
+}
+
+type word64Slice struct {
+ v reflect.Value
+}
+
+func (p word64Slice) Append(x uint64) {
+ n, m := p.v.Len(), p.v.Cap()
+ if n < m {
+ p.v.SetLen(n + 1)
+ } else {
+ t := p.v.Type().Elem()
+ p.v.Set(reflect.Append(p.v, reflect.Zero(t)))
+ }
+ elem := p.v.Index(n)
+ switch elem.Kind() {
+ case reflect.Int64:
+ elem.SetInt(int64(int64(x)))
+ case reflect.Uint64:
+ elem.SetUint(uint64(x))
+ case reflect.Float64:
+ elem.SetFloat(float64(math.Float64frombits(x)))
+ }
+}
+
+func (p word64Slice) Len() int {
+ return p.v.Len()
+}
+
+func (p word64Slice) Index(i int) uint64 {
+ elem := p.v.Index(i)
+ switch elem.Kind() {
+ case reflect.Int64:
+ return uint64(elem.Int())
+ case reflect.Uint64:
+ return uint64(elem.Uint())
+ case reflect.Float64:
+ return math.Float64bits(float64(elem.Float()))
+ }
+ panic("unreachable")
+}
+
+func structPointer_Word64Slice(p structPointer, f field) word64Slice {
+ return word64Slice{structPointer_field(p, f)}
+}
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