diff options
Diffstat (limited to 'reflect/protoreflect/value_unsafe.go')
-rw-r--r-- | reflect/protoreflect/value_unsafe.go | 99 |
1 files changed, 0 insertions, 99 deletions
diff --git a/reflect/protoreflect/value_unsafe.go b/reflect/protoreflect/value_unsafe.go deleted file mode 100644 index 702ddf22..00000000 --- a/reflect/protoreflect/value_unsafe.go +++ /dev/null @@ -1,99 +0,0 @@ -// Copyright 2018 The Go Authors. All rights reserved. -// Use of this source code is governed by a BSD-style -// license that can be found in the LICENSE file. - -//go:build !purego && !appengine -// +build !purego,!appengine - -package protoreflect - -import ( - "unsafe" - - "google.golang.org/protobuf/internal/pragma" -) - -type ( - stringHeader struct { - Data unsafe.Pointer - Len int - } - sliceHeader struct { - Data unsafe.Pointer - Len int - Cap int - } - ifaceHeader struct { - Type unsafe.Pointer - Data unsafe.Pointer - } -) - -var ( - nilType = typeOf(nil) - boolType = typeOf(*new(bool)) - int32Type = typeOf(*new(int32)) - int64Type = typeOf(*new(int64)) - uint32Type = typeOf(*new(uint32)) - uint64Type = typeOf(*new(uint64)) - float32Type = typeOf(*new(float32)) - float64Type = typeOf(*new(float64)) - stringType = typeOf(*new(string)) - bytesType = typeOf(*new([]byte)) - enumType = typeOf(*new(EnumNumber)) -) - -// typeOf returns a pointer to the Go type information. -// The pointer is comparable and equal if and only if the types are identical. -func typeOf(t interface{}) unsafe.Pointer { - return (*ifaceHeader)(unsafe.Pointer(&t)).Type -} - -// value is a union where only one type can be represented at a time. -// The struct is 24B large on 64-bit systems and requires the minimum storage -// necessary to represent each possible type. -// -// The Go GC needs to be able to scan variables containing pointers. -// As such, pointers and non-pointers cannot be intermixed. -type value struct { - pragma.DoNotCompare // 0B - - // typ stores the type of the value as a pointer to the Go type. - typ unsafe.Pointer // 8B - - // ptr stores the data pointer for a String, Bytes, or interface value. - ptr unsafe.Pointer // 8B - - // num stores a Bool, Int32, Int64, Uint32, Uint64, Float32, Float64, or - // Enum value as a raw uint64. - // - // It is also used to store the length of a String or Bytes value; - // the capacity is ignored. - num uint64 // 8B -} - -func valueOfString(v string) Value { - p := (*stringHeader)(unsafe.Pointer(&v)) - return Value{typ: stringType, ptr: p.Data, num: uint64(len(v))} -} -func valueOfBytes(v []byte) Value { - p := (*sliceHeader)(unsafe.Pointer(&v)) - return Value{typ: bytesType, ptr: p.Data, num: uint64(len(v))} -} -func valueOfIface(v interface{}) Value { - p := (*ifaceHeader)(unsafe.Pointer(&v)) - return Value{typ: p.Type, ptr: p.Data} -} - -func (v Value) getString() (x string) { - *(*stringHeader)(unsafe.Pointer(&x)) = stringHeader{Data: v.ptr, Len: int(v.num)} - return x -} -func (v Value) getBytes() (x []byte) { - *(*sliceHeader)(unsafe.Pointer(&x)) = sliceHeader{Data: v.ptr, Len: int(v.num), Cap: int(v.num)} - return x -} -func (v Value) getIface() (x interface{}) { - *(*ifaceHeader)(unsafe.Pointer(&x)) = ifaceHeader{Type: v.typ, Data: v.ptr} - return x -} |