diff --git a/api/next/57237.txt b/api/next/57237.txt new file mode 100644 index 00000000000..141dfe02f75 --- /dev/null +++ b/api/next/57237.txt @@ -0,0 +1 @@ +pkg encoding/binary, var NativeEndian nativeEndian #57237 diff --git a/src/encoding/binary/binary_test.go b/src/encoding/binary/binary_test.go index 09d08f5ee3a..341cd86766e 100644 --- a/src/encoding/binary/binary_test.go +++ b/src/encoding/binary/binary_test.go @@ -13,6 +13,7 @@ import ( "strings" "sync" "testing" + "unsafe" ) type Struct struct { @@ -831,3 +832,12 @@ func BenchmarkWriteSlice1000Uint8s(b *testing.B) { Write(w, BigEndian, slice) } } + +func TestNativeEndian(t *testing.T) { + const val = 0x12345678 + i := uint32(val) + s := unsafe.Slice((*byte)(unsafe.Pointer(&i)), unsafe.Sizeof(i)) + if v := NativeEndian.Uint32(s); v != val { + t.Errorf("NativeEndian.Uint32 returned %#x, expected %#x", v, val) + } +} diff --git a/src/encoding/binary/native_endian_big.go b/src/encoding/binary/native_endian_big.go new file mode 100644 index 00000000000..1a24354f4b5 --- /dev/null +++ b/src/encoding/binary/native_endian_big.go @@ -0,0 +1,14 @@ +// Copyright 2023 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 armbe || arm64be || m68k || mips || mips64 || mips64p32 || ppc || ppc64 || s390 || s390x || shbe || sparc || sparc64 + +package binary + +type nativeEndian struct { + bigEndian +} + +// NativeEndian is the native-endian implementation of ByteOrder and AppendByteOrder. +var NativeEndian nativeEndian diff --git a/src/encoding/binary/native_endian_little.go b/src/encoding/binary/native_endian_little.go new file mode 100644 index 00000000000..67b41ae0a2e --- /dev/null +++ b/src/encoding/binary/native_endian_little.go @@ -0,0 +1,14 @@ +// Copyright 2023 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 386 || amd64 || amd64p32 || alpha || arm || arm64 || loong64 || mipsle || mips64le || mips64p32le || nios2 || ppc64le || riscv || riscv64 || sh || wasm + +package binary + +type nativeEndian struct { + littleEndian +} + +// NativeEndian is the native-endian implementation of ByteOrder and AppendByteOrder. +var NativeEndian nativeEndian