Mercurial > repos > IBBoard.ArmyBuilder.API

annotate Loaders/ArmyBuilderABFileLoader.cs @ 3:1a54f6afafe7

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Re #84 and #85: Support Army Builder v2/v3 files * Separate out the two versions of file * Restructure file loader to load v2 files correctly * Tidy up file extractor (still not working)
author IBBoard <dev@ibboard.co.uk>
date Sun, 17 May 2009 18:40:36 +0000
parents d5ba733cd289
children ec77b60e5369
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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 private static byte HEADER_TYPE_DELIMITER = 0x3A;
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15 private static byte TABLE_HEADER_OFFSET_FROM = 4;
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16 private static byte FILE_TABLE_OFFSET_LENGTH = 2;
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17
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18 public static ABFile LoadFile(FileInfo file)
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19 {
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20 ABFile abFile = ReadFileInfo(file);
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21 ReadFileTable(abFile);
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22 return abFile;
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23 }
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24
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25 private static ABFile ReadFileInfo(FileInfo file)
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26 {
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27 BinaryReaderBigEndian reader = new BinaryReaderBigEndian(file.OpenRead());
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28 ABFile abFile = null;
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29
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30 try
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31 {
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32 abFile = ReadFileInfo(file, reader);
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33 }
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34 finally
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35 {
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36 reader.Close();
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37 }
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38
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39 return abFile;
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40 }
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41
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42 private static ABFile ReadFileInfo(FileInfo file, BinaryReaderBigEndian reader)
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43 {
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44 int tableOffset = reader.ReadInt();
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45 reader.Move(tableOffset);
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46 ushort fileTableOffset = reader.ReadUShort();
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47 string header = reader.ReadDelimitedString(HEADER_TYPE_DELIMITER);
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48
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49 ABFile abFile = CreateFile(file, header);
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50 ReadExtraHeaders(abFile, reader);
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51 int fileTablePosition = TABLE_HEADER_OFFSET_FROM + tableOffset + FILE_TABLE_OFFSET_LENGTH + fileTableOffset;
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52 abFile.FileTablePosition = fileTablePosition;
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53 int readerPosition = (int)reader.Position;
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54
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55 if (fileTablePosition > readerPosition)
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56 {
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57 abFile.Comment = reader.ReadString(fileTablePosition - readerPosition);
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58 }
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59
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60 return abFile;
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61 }
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62
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63 private static ABFile CreateFile(FileInfo file, string header)
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64 {
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65 ABFile abFile = null;
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66 header = header.Trim();
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67
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68 if ("LWDExport".Equals(header))
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69 {
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70 abFile = new ABv3File(file);
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71 }
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72 else if ("ArmyBuilder".Equals(header))
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73 {
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74 abFile = new ABv2File(file);
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75 }
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76 else
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77 {
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78 throw new InvalidDataException("Unsupported file table header: "+header);
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79 }
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80
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81 abFile.Header = header;
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82 return abFile;
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83 }
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84
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85 private static void ReadExtraHeaders(ABFile abFile, BinaryReaderBigEndian reader)
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86 {
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87 if (abFile is ABv3File)
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88 {
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89 ABv3File ab3File = (ABv3File)abFile;
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90 ab3File.GameName = reader.ReadDelimitedString(HEADER_DELIMITER);
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91 ab3File.FolderName = reader.ReadDelimitedString(HEADER_DELIMITER);
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92 ab3File.ReleaseMajor = reader.ReadDelimitedString(HEADER_DELIMITER);
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93 ab3File.ReleaseMinor = reader.ReadDelimitedString(HEADER_DELIMITER);
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94 ab3File.RequiredMajorVersion = reader.ReadDelimitedString(HEADER_DELIMITER);
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95 ab3File.RequiredMinorVersion = reader.ReadDelimitedString(HEADER_DELIMITER);
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96 ab3File.UniqueID = reader.ReadDelimitedString(HEADER_DELIMITER);
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97 ab3File.Exporter = reader.ReadDelimitedString(HEADER_DELIMITER);
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98 }
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99 }
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100
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101 private static void ReadFileTable(ABFile abFile)
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102 {
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103 BinaryReaderBigEndian reader = new BinaryReaderBigEndian(abFile.File.OpenRead());
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104
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105 try
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106 {
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107 ReadFileTable(abFile, reader);
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108 }
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109 finally
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110 {
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111 reader.Close();
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112 }
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113 }
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114
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115 private static void ReadFileTable(ABFile abFile, BinaryReaderBigEndian reader)
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116 {
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117 FileTableEntry entry = null;
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118 reader.Seek(abFile.FileTablePosition);
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119
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120 do
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121 {
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122 entry = ReadFileTableEntry(reader);
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123 abFile.AddFileTableEntry(entry);
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124 }
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125 while (entry!=null);
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126 }
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127
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128 private static FileTableEntry ReadFileTableEntry(BinaryReaderBigEndian reader)
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129 {
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130 FileTableEntry entry = null;
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131 string name = reader.ReadUShortLengthString();
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132
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133 if (name!="" && name!=null)
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134 {
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135 entry = new FileTableEntry(name);
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
136 entry.FirstBytes = reader.ReadBytes(8);
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
137 entry.FileSize = reader.ReadInt();
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
138 entry.CompressedSize = reader.ReadInt();
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
139 entry.MidBytes = reader.ReadBytes(4);
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
140 entry.Location = reader.ReadInt();
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
141 entry.EndBytes = reader.ReadBytes(8);
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
142 }
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
143
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
144 return entry;
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
145 }
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
146 }
1a5205612b72 Add initial work on ArmyBuilder API project\nno-open-ticket
IBBoard <dev@ibboard.co.uk>
parents:
diff changeset
147 }