mirror of
https://github.com/NVIDIA/nvidia-container-toolkit
synced 2024-11-24 13:05:17 +00:00
113 lines
2.4 KiB
Go
113 lines
2.4 KiB
Go
/*
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* Copyright (c) 2021, NVIDIA CORPORATION. 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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*/
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package bytes
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import (
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"unsafe"
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)
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type swapbo []byte
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var _ Bytes = (*swapbo)(nil)
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func (b *swapbo) Read8(pos int) uint8 {
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return (*b)[pos]
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}
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func (b *swapbo) Read16(pos int) uint16 {
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buf := [2]byte{}
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buf[0] = (*b)[pos+1]
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buf[1] = (*b)[pos+0]
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return *(*uint16)(unsafe.Pointer(&buf[0]))
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}
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func (b *swapbo) Read32(pos int) uint32 {
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buf := [4]byte{}
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buf[0] = (*b)[pos+3]
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buf[1] = (*b)[pos+2]
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buf[2] = (*b)[pos+1]
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buf[3] = (*b)[pos+0]
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return *(*uint32)(unsafe.Pointer(&buf[0]))
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}
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func (b *swapbo) Read64(pos int) uint64 {
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buf := [8]byte{}
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buf[0] = (*b)[pos+7]
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buf[1] = (*b)[pos+6]
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buf[2] = (*b)[pos+5]
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buf[3] = (*b)[pos+4]
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buf[4] = (*b)[pos+3]
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buf[5] = (*b)[pos+2]
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buf[6] = (*b)[pos+1]
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buf[7] = (*b)[pos+0]
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return *(*uint64)(unsafe.Pointer(&buf[0]))
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}
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func (b *swapbo) Write8(pos int, value uint8) {
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(*b)[pos] = value
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}
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func (b *swapbo) Write16(pos int, value uint16) {
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buf := [2]byte{}
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*(*uint16)(unsafe.Pointer(&buf[0])) = value
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(*b)[pos+0] = buf[1]
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(*b)[pos+1] = buf[0]
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}
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func (b *swapbo) Write32(pos int, value uint32) {
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buf := [4]byte{}
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*(*uint32)(unsafe.Pointer(&buf[0])) = value
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(*b)[pos+0] = buf[3]
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(*b)[pos+1] = buf[2]
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(*b)[pos+2] = buf[1]
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(*b)[pos+3] = buf[0]
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}
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func (b *swapbo) Write64(pos int, value uint64) {
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buf := [8]byte{}
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*(*uint64)(unsafe.Pointer(&buf[0])) = value
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(*b)[pos+0] = buf[7]
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(*b)[pos+1] = buf[6]
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(*b)[pos+2] = buf[5]
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(*b)[pos+3] = buf[4]
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(*b)[pos+4] = buf[3]
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(*b)[pos+5] = buf[2]
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(*b)[pos+6] = buf[1]
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(*b)[pos+7] = buf[0]
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}
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func (b *swapbo) Slice(offset int, size int) Bytes {
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nb := (*b)[offset : offset+size]
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return &nb
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}
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func (b *swapbo) LittleEndian() Bytes {
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return NewLittleEndian((*[]byte)(b))
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}
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func (b *swapbo) BigEndian() Bytes {
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return NewBigEndian((*[]byte)(b))
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}
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func (b *swapbo) Raw() *[]byte {
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return (*[]byte)(b)
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}
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func (b *swapbo) Len() int {
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return len(*b)
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}
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