mirror of https://github.com/icedland/iced.git
85 lines
2.5 KiB
C#
85 lines
2.5 KiB
C#
/*
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Copyright (C) 2018 de4dot@gmail.com
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This file is part of Iced.
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Iced is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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Iced is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with Iced. If not, see <https://www.gnu.org/licenses/>.
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*/
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#if (!NO_DECODER32 || !NO_DECODER64) && !NO_DECODER
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using System;
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namespace Iced.Intel {
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/// <summary>
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/// A <see cref="CodeReader"/> that reads data from a byte array
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/// </summary>
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public sealed class ByteArrayCodeReader : CodeReader {
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readonly byte[] data;
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int currentPosition;
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readonly int endPosition;
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/// <summary>
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/// Checks if it's possible to read another byte
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/// </summary>
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public bool CanReadByte => currentPosition < endPosition;
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="hexData">Hex bytes encoded in a string</param>
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public ByteArrayCodeReader(string hexData)
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: this(HexUtils.ToByteArray(hexData)) {
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}
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="data">Data</param>
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public ByteArrayCodeReader(byte[] data) {
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this.data = data ?? throw new ArgumentNullException(nameof(data));
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currentPosition = 0;
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endPosition = data.Length;
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}
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="data">Data</param>
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/// <param name="index">Start index</param>
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/// <param name="count">Number of bytes</param>
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public ByteArrayCodeReader(byte[] data, int index, int count) {
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this.data = data ?? throw new ArgumentNullException(nameof(data));
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if (index < 0)
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throw new ArgumentOutOfRangeException(nameof(index));
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if (count < 0)
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throw new ArgumentOutOfRangeException(nameof(count));
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if ((ulong)(uint)index + (uint)count > (uint)data.Length)
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throw new ArgumentOutOfRangeException(nameof(count));
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currentPosition = index;
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endPosition = index + count;
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}
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/// <summary>
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/// Reads the next byte or returns less than 0 if there are no more bytes
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/// </summary>
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/// <returns></returns>
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public override int ReadByte() {
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if (currentPosition >= endPosition)
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return -1;
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return data[currentPosition++];
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}
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}
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}
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#endif
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