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Code Issues Releases Activity

Refactor PEFormat into smaller classes following Single Responsibility Principle

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bird_egop
2025-04-12 17:12:18 +03:00
parent 61a86f6681
commit f1a2fca4f3
9 changed files with 746 additions and 539 deletions
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63
X86Disassembler/PE/Parsers/DOSHeaderParser.cs Normal file
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using System;
using System.IO;
namespace X86Disassembler.PE.Parsers
{
/// <summary>
/// Parser for the DOS header of a PE file
/// </summary>
public class DOSHeaderParser : IParser<DOSHeader>
{
// DOS Header constants
private const ushort DOS_SIGNATURE = 0x5A4D; // 'MZ'
/// <summary>
/// Parse the DOS header from the binary reader
/// </summary>
/// <param name="reader">The binary reader positioned at the start of the DOS header</param>
/// <returns>The parsed DOS header</returns>
public DOSHeader Parse(BinaryReader reader)
{
DOSHeader header = new DOSHeader();
header.e_magic = reader.ReadUInt16();
if (header.e_magic != DOS_SIGNATURE)
{
throw new InvalidDataException("Invalid DOS signature (MZ)");
}
header.e_cblp = reader.ReadUInt16();
header.e_cp = reader.ReadUInt16();
header.e_crlc = reader.ReadUInt16();
header.e_cparhdr = reader.ReadUInt16();
header.e_minalloc = reader.ReadUInt16();
header.e_maxalloc = reader.ReadUInt16();
header.e_ss = reader.ReadUInt16();
header.e_sp = reader.ReadUInt16();
header.e_csum = reader.ReadUInt16();
header.e_ip = reader.ReadUInt16();
header.e_cs = reader.ReadUInt16();
header.e_lfarlc = reader.ReadUInt16();
header.e_ovno = reader.ReadUInt16();
header.e_res = new ushort[4];
for (int i = 0; i < 4; i++)
{
header.e_res[i] = reader.ReadUInt16();
}
header.e_oemid = reader.ReadUInt16();
header.e_oeminfo = reader.ReadUInt16();
header.e_res2 = new ushort[10];
for (int i = 0; i < 10; i++)
{
header.e_res2[i] = reader.ReadUInt16();
}
header.e_lfanew = reader.ReadUInt32();
return header;
}
}
}