using System;

namespace X86Disassembler.PE
{
    /// <summary>
    /// Represents the DOS header of a PE file
    /// </summary>
    public class DOSHeader
    {
        public ushort e_magic;       // Magic number (MZ)
        public ushort e_cblp;        // Bytes on last page of file
        public ushort e_cp;          // Pages in file
        public ushort e_crlc;        // Relocations
        public ushort e_cparhdr;     // Size of header in paragraphs
        public ushort e_minalloc;    // Minimum extra paragraphs needed
        public ushort e_maxalloc;    // Maximum extra paragraphs needed
        public ushort e_ss;          // Initial (relative) SS value
        public ushort e_sp;          // Initial SP value
        public ushort e_csum;        // Checksum
        public ushort e_ip;          // Initial IP value
        public ushort e_cs;          // Initial (relative) CS value
        public ushort e_lfarlc;      // File address of relocation table
        public ushort e_ovno;        // Overlay number
        public ushort[] e_res;       // Reserved words
        public ushort e_oemid;       // OEM identifier (for e_oeminfo)
        public ushort e_oeminfo;     // OEM information; e_oemid specific
        public ushort[] e_res2;      // Reserved words
        public uint e_lfanew;        // File address of new exe header
        
        /// <summary>
        /// Initializes a new instance of the DOSHeader class
        /// </summary>
        public DOSHeader()
        {
            // Initialize arrays to avoid nullability warnings
            e_res = new ushort[4];
            e_res2 = new ushort[10];
        }
    }
}