59 lines
1.6 KiB
Go
59 lines
1.6 KiB
Go
// Copyright 2018 Google LLC
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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 bpf
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import (
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"encoding/binary"
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)
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// InputBytes implements the Input interface by providing access to a byte
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// slice. Unaligned loads are supported.
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type InputBytes struct {
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// Data is the data accessed through the Input interface.
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Data []byte
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// Order is the byte order the data is accessed with.
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Order binary.ByteOrder
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}
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// Load32 implements Input.Load32.
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func (i InputBytes) Load32(off uint32) (uint32, bool) {
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if uint64(off)+4 > uint64(len(i.Data)) {
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return 0, false
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}
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return i.Order.Uint32(i.Data[int(off):]), true
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}
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// Load16 implements Input.Load16.
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func (i InputBytes) Load16(off uint32) (uint16, bool) {
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if uint64(off)+2 > uint64(len(i.Data)) {
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return 0, false
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}
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return i.Order.Uint16(i.Data[int(off):]), true
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}
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// Load8 implements Input.Load8.
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func (i InputBytes) Load8(off uint32) (uint8, bool) {
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if uint64(off)+1 > uint64(len(i.Data)) {
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return 0, false
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}
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return i.Data[int(off)], true
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}
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// Length implements Input.Length.
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func (i InputBytes) Length() uint32 {
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return uint32(len(i.Data))
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}
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