Mercurial > repos > IBBoard.ArmyBuilder.API

annotate Loaders/ArmyBuilderABFileLoader.cs @ 2:d5ba733cd289

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Re #77 - Identify fields in .ab files * Rename "UnknownNumber" to "UniqueID" based on data in "update XML" files
author IBBoard <dev@ibboard.co.uk>
date Mon, 20 Apr 2009 19:28:01 +0000
parents 1a5205612b72
children 1a54f6afafe7
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1 // This file (ArmyBuilderFileLoader.cs) is a part of the IBBoard.ArmyBuilder.API project and is copyright 2009 IBBoard
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2 //
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3 // The file and the library/program it is in are licensed under the GNU LGPL license, either version 3 of the License or (at your option) any later version. Please see COPYING.LGPL for more information and the full license.
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4 //
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5
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6 using System;
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7 using System.IO;
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8
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9 namespace IBBoard.ArmyBuilder.API.Loaders
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10 {
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11 public class ArmyBuilderABFileLoader
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12 {
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13 private static byte HEADER_DELIMITER = 0x09;
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14
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15 public static ABFile LoadFile(FileInfo file)
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16 {
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17 ABFile abFile = new ABFile(file);
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18 LoadData(abFile);
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19 return abFile;
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20 }
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21
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22 private static void LoadData(ABFile abFile)
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23 {
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24 BinaryReaderBigEndian reader = new BinaryReaderBigEndian(abFile.File.OpenRead());
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25
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26 try
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27 {
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28 ReadFileInfo(abFile, reader);
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29 ReadFileTable(abFile, reader);
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30 }
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31 finally
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32 {
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33 reader.Close();
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34 }
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35 }
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37 private static void ReadFileInfo(ABFile abFile, BinaryReaderBigEndian reader)
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38 {
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39 int tableOffset = reader.ReadInt();
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40 reader.Move(tableOffset);
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41 ushort fileTableOffset = reader.ReadUShort();
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42 abFile.Header = reader.ReadDelimitedString(HEADER_DELIMITER);
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43 abFile.GameName = reader.ReadDelimitedString(HEADER_DELIMITER);
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44 abFile.FolderName = reader.ReadDelimitedString(HEADER_DELIMITER);
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45 abFile.ReleaseMajor = reader.ReadDelimitedString(HEADER_DELIMITER);
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46 abFile.ReleaseMinor = reader.ReadDelimitedString(HEADER_DELIMITER);
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47 abFile.RequiredMajorVersion = reader.ReadDelimitedString(HEADER_DELIMITER);
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48 abFile.RequiredMinorVersion = reader.ReadDelimitedString(HEADER_DELIMITER);
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49 abFile.UniqueID = reader.ReadDelimitedString(HEADER_DELIMITER);
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50 abFile.Exporter = reader.ReadDelimitedString(HEADER_DELIMITER);
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51 int bytesRead = CalculateFileInfoSize(abFile);
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52
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53 if (fileTableOffset > bytesRead)
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54 {
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55 abFile.Comment = reader.ReadString(fileTableOffset - bytesRead);
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56 }
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57 }
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58
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59 private static int CalculateFileInfoSize(ABFile file)
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60 {
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61 return file.Header.Length + file.GameName.Length + file.FolderName.Length + file.ReleaseMajor.Length + file.ReleaseMinor.Length +
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62 file.RequiredMajorVersion.Length + file.RequiredMinorVersion.Length + file.UniqueID.Length + file.Exporter.Length + 9;
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63 }
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64
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65 private static void ReadFileTable(ABFile abFile, BinaryReaderBigEndian reader)
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66 {
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67 FileTableEntry entry = null;
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68
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69 do
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70 {
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71 entry = ReadFileTableEntry(reader);
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72 abFile.AddFileTableEntry(entry);
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73 }
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74 while (entry!=null);
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75 }
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76
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77 private static FileTableEntry ReadFileTableEntry(BinaryReaderBigEndian reader)
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78 {
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79 FileTableEntry entry = null;
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80 string name = reader.ReadUShortLengthString();
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81
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82 if (name!="" && name!=null)
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83 {
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84 entry = new FileTableEntry(name);
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85 entry.FirstBytes = reader.ReadBytes(8);
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86 entry.FileSize = reader.ReadInt();
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87 entry.CompressedSize = reader.ReadInt();
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88 entry.MidBytes = reader.ReadBytes(4);
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89 entry.Location = reader.ReadInt();
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90 entry.EndBytes = reader.ReadBytes(8);
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91 }
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92
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93 return entry;
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94 }
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95 }
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96 }