/*
 * Process Hacker - 
 *   PE/COFF header reader
 * 
 * Copyright (C) 2008 wj32
 * Descriptions from the PE/COFF specification from Microsoft.
 * 
 * This file is part of Process Hacker.
 * 
 * Process Hacker is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Process Hacker is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Process Hacker.  If not, see <http://www.gnu.org/licenses/>.
 */

using System;
using System.Collections.Generic;
using System.Text;
using System.IO;

namespace ProcessHacker.PE
{
    /// <summary>
    /// Represents a COFF header.
    /// </summary>
    public class COFFHeader
    {
        public COFFHeader(BinaryReader br)
        {
            this.Machine = (MachineType)br.ReadUInt16();
            this.NumberOfSections = br.ReadUInt16();
            this.TimeDateStamp = br.ReadUInt32();
            this.PointerToSymbolTable = br.ReadUInt32();
            this.NumberOfSymbols = br.ReadUInt32();
            this.SizeOfOptionalHeader = br.ReadUInt16();
            this.Characteristics = (ImageCharacteristics)br.ReadUInt16();
        }

        /// <summary>
        /// The number that identifies the type of target machine.
        /// </summary>
        public MachineType Machine;

        /// <summary>
        /// The number of sections. This indicates the size of the section table, which 
        /// immediately follows the headers.
        /// </summary>
        public ushort NumberOfSections;

        /// <summary>
        /// The low 32 bits of the number of seconds since 00:00 January 1, 1970 (a C run-time 
        /// time_t value), that indicates when the file was created.
        /// </summary>
        public uint TimeDateStamp;

        /// <summary>
        /// The file offset of the COFF symbol table, or zero if no COFF symbol table is present. 
        /// This value should be zero for an image because COFF debugging information is deprecated.
        /// </summary>
        public uint PointerToSymbolTable;

        /// <summary>
        /// The number of entries in the symbol table. This data can be used to locate the string 
        /// table, which immediately follows the symbol table. This value should be zero for an image 
        /// because COFF debugging information is deprecated.
        /// </summary>
        public uint NumberOfSymbols;

        /// <summary>
        /// The size of the optional header, which is required for executable files but not for 
        /// object files. This value should be zero for an object file. 
        /// </summary>
        public ushort SizeOfOptionalHeader;

        /// <summary>
        /// The flags that indicate the attributes of the file.
        /// </summary>
        public ImageCharacteristics Characteristics;
    }
}