66 lines
1.8 KiB
Go
66 lines
1.8 KiB
Go
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// Copyright 2018 Google LLC. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package binaryutil contains convenience wrappers around encoding/binary.
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package binaryutil
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import (
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"encoding/binary"
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"github.com/koneu/natend"
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)
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// ByteOrder is like binary.ByteOrder, but allocates memory and returns byte
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// slices, for convenience.
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type ByteOrder interface {
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PutUint16(v uint16) []byte
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PutUint32(v uint32) []byte
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}
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// NativeEndian is either little endian or big endian, depending on the native
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// endian-ness, and allocates memory and returns byte slices, for convenience.
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var NativeEndian ByteOrder = &nativeEndian{}
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type nativeEndian struct{}
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func (nativeEndian) PutUint16(v uint16) []byte {
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buf := make([]byte, 2)
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natend.NativeEndian.PutUint16(buf, v)
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return buf
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}
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func (nativeEndian) PutUint32(v uint32) []byte {
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buf := make([]byte, 4)
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natend.NativeEndian.PutUint32(buf, v)
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return buf
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}
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// BigEndian is like binary.BigEndian, but allocates memory and returns byte
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// slices, for convenience.
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var BigEndian ByteOrder = &bigEndian{}
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type bigEndian struct{}
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func (bigEndian) PutUint16(v uint16) []byte {
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buf := make([]byte, 2)
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binary.BigEndian.PutUint16(buf, v)
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return buf
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}
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func (bigEndian) PutUint32(v uint32) []byte {
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buf := make([]byte, 4)
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binary.BigEndian.PutUint32(buf, v)
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return buf
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}
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