90 lines
2.9 KiB
C#
90 lines
2.9 KiB
C#
/*
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Copyright (C) 2014-2019 de4dot@gmail.com
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This file is part of dnSpy
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dnSpy is free software: you can redistribute it and/or modify
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it under the terms of the GNU 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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dnSpy 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 General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with dnSpy. If not, see <http://www.gnu.org/licenses/>.
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*/
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using System;
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using dnSpy.Contracts.Hex.Text;
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namespace dnSpy.Contracts.Hex.Files.DotNet {
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/// <summary>
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/// .NET table record
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/// </summary>
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public sealed class TableRecordData : StructureData {
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/// <summary>
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/// Gets the token
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/// </summary>
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public MDToken Token { get; }
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/// <summary>
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/// Gets the fields
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/// </summary>
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protected override BufferField[] Fields { get; }
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/// <summary>
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/// Gets the owner heap
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/// </summary>
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public TablesHeap TablesHeap { get; }
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/// <summary>
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/// Constructor
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/// </summary>
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/// <param name="tableName">Name of table</param>
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/// <param name="token">Token</param>
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/// <param name="span">Span</param>
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/// <param name="fields">Fields</param>
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/// <param name="tablesHeap">Owner heap</param>
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public TableRecordData(string tableName, MDToken token, HexBufferSpan span, BufferField[] fields, TablesHeap tablesHeap)
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: base(tableName, span) {
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if (fields is null)
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throw new ArgumentNullException(nameof(fields));
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if (fields.Length == 0)
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throw new ArgumentOutOfRangeException(nameof(fields));
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Token = token;
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Fields = fields;
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TablesHeap = tablesHeap ?? throw new ArgumentNullException(nameof(tablesHeap));
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}
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/// <summary>
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/// Writes the name
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/// </summary>
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/// <param name="formatter">Formatter</param>
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public override void WriteName(HexFieldFormatter formatter) {
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formatter.Write(Token.Table.ToString(), PredefinedClassifiedTextTags.ValueType);
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formatter.WriteArrayField(Token.Rid);
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}
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/// <summary>
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/// Reads a column, treating the column value as an unsigned integer
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/// </summary>
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/// <param name="index">Index of column</param>
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/// <returns></returns>
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public uint ReadColumn(int index) {
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var mdTable = TablesHeap.MDTables[(int)Token.Table];
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if ((uint)index >= (uint)mdTable.Columns.Count)
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throw new ArgumentOutOfRangeException(nameof(index));
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var column = mdTable.Columns[index];
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switch (column.Size) {
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case 1: return Span.Buffer.ReadByte(Span.Start + column.Offset);
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case 2: return Span.Buffer.ReadUInt16(Span.Start + column.Offset);
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case 4: return Span.Buffer.ReadUInt32(Span.Start + column.Offset);
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default: throw new InvalidOperationException();
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}
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}
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}
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}
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