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123 lines
3.8 KiB
C#
123 lines
3.8 KiB
C#
/* This file is part of libmspack.
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* (C) 2003-2018 Stuart Caie.
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*
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* libmspack is free software; you can redistribute it and/or modify it under
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* the terms of the GNU Lesser General Public License (LGPL) version 2.1
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*
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* For further details, see the file COPYING.LIB distributed with libmspack
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*/
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using System;
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namespace LibMSPackSharp.CAB
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{
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internal class _FileHeader
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{
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#region Fields
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/// <summary>
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/// The uncompressed length of the file, in bytes.
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/// </summary>
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/// <remarks>0x00</remarks>
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public uint UncompressedSize { get; private set; }
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/// <summary>
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/// The uncompressed offset of this file in its folder.
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/// </summary>
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/// <remarks>0x04</remarks>
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public uint FolderOffset { get; private set; }
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/// <summary>
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/// Internal index of the folder
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/// </summary>
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/// <remarks>0x08</remarks>
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public FileFlags FolderIndex { get; internal set; }
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/// <summary>
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/// File's last modified date, day field.
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/// </summary>
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/// <remarks>0x0A</remarks>
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public byte LastModifiedDateDay { get; set; }
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/// <summary>
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/// File's last modified date, month field.
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/// </summary>
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/// <remarks>0x0A</remarks>
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public byte LastModifiedDateMonth { get; set; }
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/// <summary>
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/// File's last modified date, year field.
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/// </summary>
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/// <remarks>0x0A</remarks>
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public int LastModifiedDateYear { get; set; }
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/// <summary>
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/// File's last modified time, hour field.
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/// </summary>
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/// <remarks>0x0C</remarks>
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public byte LastModifiedTimeHour { get; set; }
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/// <summary>
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/// File's last modified time, minute field.
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/// </summary>
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/// <remarks>0x0C</remarks>
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public byte LastModifiedTimeMinute { get; set; }
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/// <summary>
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/// File's last modified time, second field.
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/// </summary>
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/// <remarks>0x0C</remarks>
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public byte LastModifiedTimeSecond { get; set; }
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/// <summary>
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/// File attributes.
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/// </summary>
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/// <remarks>0x0E</remarks>
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public FileAttributes Attributes { get; set; }
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/// <summary>
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/// Size of the File header in bytes
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/// </summary>
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public const int Size = 0x10;
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#endregion
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/// <summary>
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/// Private constructor
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/// </summary>
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private _FileHeader() { }
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/// <summary>
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/// Create a _FileHeader from a byte array, if possible
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/// </summary>
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public static Error Create(byte[] buffer, out _FileHeader header)
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{
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header = null;
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if (buffer == null || buffer.Length < Size)
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return Error.MSPACK_ERR_READ;
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header = new _FileHeader();
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header.UncompressedSize = BitConverter.ToUInt32(buffer, 0x00);
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header.FolderOffset = BitConverter.ToUInt32(buffer, 0x04);
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header.FolderIndex = (FileFlags)BitConverter.ToUInt16(buffer, 0x08);
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// Get date
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ushort x = BitConverter.ToUInt16(buffer, 0x0A);
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header.LastModifiedDateDay = (byte)(x & 0x1F);
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header.LastModifiedDateMonth = (byte)((x >> 5) & 0xF);
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header.LastModifiedDateYear = (x >> 9) + 1980;
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// Get time
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x = BitConverter.ToUInt16(buffer, 0x0C);
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header.LastModifiedTimeHour = (byte)(x >> 11);
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header.LastModifiedTimeMinute = (byte)((x >> 5) & 0x3F);
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header.LastModifiedTimeSecond = (byte)((x << 1) & 0x3E);
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header.Attributes = (FileAttributes)BitConverter.ToUInt16(buffer, 0x0E);
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return Error.MSPACK_ERR_OK;
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}
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}
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}
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