private static void WriteLocaleChanges(Patch patch, IWriter writer)
{
if (patch.LanguageChanges.Count == 0)
return;
long startPos = writer.Position;
writer.WriteInt32(AssemblyPatchBlockID.Locl);
writer.WriteUInt32(0); // Size filled in later
writer.WriteByte(0); // Version 0
// Write change data for each language
writer.WriteByte((byte)patch.LanguageChanges.Count);
foreach (LanguageChange language in patch.LanguageChanges)
{
writer.WriteByte(language.LanguageIndex);
// Write the change data for each string in the language
writer.WriteInt32(language.LocaleChanges.Count);
foreach (LocaleChange change in language.LocaleChanges)
{
writer.WriteUInt16((ushort)change.Index);
writer.WriteUTF8(change.NewValue);
}
}
// Fill in the block size
long endPos = writer.Position;
writer.SeekTo(startPos + 4);
writer.WriteUInt32((uint)(endPos - startPos));
writer.SeekTo(endPos);
}
private void makePatch_Click(object sender, EventArgs e)
{
Patch patch = new Patch();
patch.Name = patchName.Text;
patch.Description = patchDescription.Text;
patch.Author = patchAuthor.Text;
IReader originalReader = new EndianReader(File.OpenRead(unmoddedPath.Text), Endian.BigEndian);
IReader newReader = new EndianReader(File.OpenRead(moddedPath.Text), Endian.BigEndian);
ThirdGenVersionInfo version = new ThirdGenVersionInfo(originalReader);
BuildInfoLoader loader = new BuildInfoLoader(XDocument.Load(@"Formats\SupportedBuilds.xml"), @"Formats\");
BuildInformation buildInfo = loader.LoadBuild(version.BuildString);
ThirdGenCacheFile originalFile = new ThirdGenCacheFile(originalReader, buildInfo, version.BuildString);
ThirdGenCacheFile newFile = new ThirdGenCacheFile(newReader, buildInfo, version.BuildString);
MetaComparer.CompareMeta(originalFile, originalReader, newFile, newReader, patch);
LocaleComparer.CompareLocales(originalFile, originalReader, newFile, newReader, patch);
originalReader.Close();
newReader.Close();
IWriter output = new EndianWriter(File.OpenWrite(outPath.Text), Endian.BigEndian);
AssemblyPatchWriter.WritePatch(patch, output);
output.Close();
MessageBox.Show("Done!");
}
/// <summary>
/// Compares the tag meta between two cache files and adds the results to a patch.
/// </summary>
/// <param name="originalFile">The unmodified cache file.</param>
/// <param name="originalReader">A stream open on the unmodified cache file.</param>
/// <param name="newFile">The modified cache file.</param>
/// <param name="newReader">A stream open on the modified cache file.</param>
/// <param name="output">The Patch to add results to.</param>
public static void CompareMeta(ICacheFile originalFile, IReader originalReader, ICacheFile newFile, IReader newReader, Patch output)
{
// TODO: Handle files with expanded meta partitions
uint address = originalFile.Info.MetaBase.AsAddress();
uint offset = originalFile.Info.MetaBase.AsOffset();
uint endOffset = offset + originalFile.Info.MetaSize;
const int BufferSize = 0x1000;
byte[] oldBuffer = new byte[BufferSize];
byte[] newBuffer = new byte[BufferSize];
int diffStart = 0;
uint diffAddress = 0;
int diffSize = 0;
originalReader.SeekTo(offset);
newReader.SeekTo(offset);
while (offset < endOffset)
{
// Read the meta in large blocks and then compare the blocks
originalReader.ReadBlock(oldBuffer, 0, BufferSize);
newReader.ReadBlock(newBuffer, 0, BufferSize);
for (int i = 0; i < oldBuffer.Length; i++)
{
if (oldBuffer[i] != newBuffer[i])
{
if (diffSize == 0)
{
diffStart = i;
diffAddress = (uint)(address + i);
}
diffSize++;
}
else if (diffSize > 0)
{
// Copy the differing bytes to a buffer
byte[] diff = new byte[diffSize];
Array.Copy(newBuffer, diffStart, diff, 0, diffSize);
// Export the change data
MetaChange change = new MetaChange((uint)(address + i), diff);
output.MetaChanges.Add(change);
diffSize = 0;
}
}
offset += BufferSize;
address += BufferSize;
}
}
public static void WritePatch(Patch patch, IWriter writer)
{
writer.WriteInt32(AssemblyPatchMagic);
writer.WriteUInt32(0); // File size filled in later
writer.WriteByte(0); // No compression
WriteBlocks(patch, writer);
// Fill in the file size
long fileSize = writer.Position;
writer.SeekTo(4);
writer.WriteUInt32((uint)fileSize - 8);
writer.SeekTo(fileSize);
}
private static void ReadPatchInfo(IReader reader, Patch output)
{
byte version = reader.ReadByte();
// Version 0 (all versions)
output.MapID = reader.ReadInt32();
output.MapInternalName = reader.ReadAscii();
output.Name = reader.ReadUTF16();
output.Description = reader.ReadUTF16();
output.Author = reader.ReadUTF16();
int screenshotLength = reader.ReadInt32();
if (screenshotLength > 0)
output.Screenshot = reader.ReadBlock(screenshotLength);
}
/// <summary>
/// Compares the locale data of two cache files and adds the results to a patch.
/// </summary>
/// <param name="originalFile">The unmodified cache file.</param>
/// <param name="originalReader">A stream open on the unmodified cache file.</param>
/// <param name="newFile">The modified cache file.</param>
/// <param name="newReader">A stream open on the modified cache file.</param>
/// <param name="output">The Patch to add results to.</param>
public static void CompareLocales(ICacheFile originalFile, IReader originalReader, ICacheFile newFile, IReader newReader, Patch output)
{
if (originalFile.Languages.Count != newFile.Languages.Count)
throw new InvalidOperationException("Cannot compare locales between cache files with different language counts.");
// Compare each language
for (int i = 0; i < originalFile.Languages.Count; i++)
{
// Compare the strings in the two language
LanguageChange change = CompareLanguages((byte)i, originalFile.Languages[i], originalReader, newFile.Languages[i], newReader);
// Only add the info if anything actually changed between the two languages
if (change.LocaleChanges.Count > 0)
output.LanguageChanges.Add(change);
}
}
private static void WriteMetaChanges(Patch patch, IWriter writer)
{
if (patch.MetaChanges.Count == 0)
return;
long startPos = writer.Position;
writer.WriteInt32(AssemblyPatchBlockID.Meta);
writer.WriteUInt32(0); // Size filled in later
writer.WriteByte(0); // Version 0
// Filter meta changes by size (as a file size optimization)
List<MetaChange> fourByteChanges = new List<MetaChange>();
List<MetaChange> otherChanges = new List<MetaChange>();
foreach (MetaChange change in patch.MetaChanges)
{
if (change.Data.Length == 4)
fourByteChanges.Add(change);
else
otherChanges.Add(change);
}
// Write 4-byte changes
writer.WriteUInt32((uint)fourByteChanges.Count);
foreach (MetaChange change in fourByteChanges)
{
writer.WriteUInt32(change.Address);
writer.WriteBlock(change.Data);
}
// Write other changes
writer.WriteUInt32((uint)otherChanges.Count);
foreach (MetaChange change in otherChanges)
{
writer.WriteUInt32(change.Address);
writer.WriteUInt32((uint)change.Data.Length);
writer.WriteBlock(change.Data);
}
// Fill in the block size
long endPos = writer.Position;
writer.SeekTo(startPos + 4);
writer.WriteUInt32((uint)(endPos - startPos));
writer.SeekTo(endPos);
}
private static void ReadMetaChanges(IReader reader, Patch output)
{
byte version = reader.ReadByte();
// Version 0 (all versions)
uint num4ByteChanges = 0;
for (uint i = 0; i < num4ByteChanges; i++)
{
uint address = reader.ReadUInt32();
byte[] data = reader.ReadBlock(4);
output.MetaChanges.Add(new MetaChange(address, data));
}
uint numChanges = 0;
for (uint i = 0; i < numChanges; i++)
{
uint address = reader.ReadUInt32();
uint dataSize = reader.ReadUInt32();
byte[] data = reader.ReadBlock((int)dataSize);
output.MetaChanges.Add(new MetaChange(address, data));
}
}
private static Patch ReadBlocks(IReader reader, uint offset, uint endOffset)
{
Patch result = new Patch();
while (offset < endOffset)
{
reader.SeekTo(offset);
int blockId = reader.ReadInt32();
uint size = reader.ReadUInt32();
switch (blockId)
{
case AssemblyPatchBlockID.Titl:
ReadPatchInfo(reader, result);
break;
case AssemblyPatchBlockID.Meta:
ReadMetaChanges(reader, result);
break;
}
// Skip to the next block
offset += size;
}
return result;
}
private static void WriteBlocks(Patch patch, IWriter writer)
{
WritePatchInfo(patch, writer);
WriteMetaChanges(patch, writer);
WriteLocaleChanges(patch, writer);
}
private static void WritePatchInfo(Patch patch, IWriter writer)
{
long startPos = writer.Position;
writer.WriteInt32(AssemblyPatchBlockID.Titl);
writer.WriteUInt32(0); // Size filled in later
writer.WriteByte(0); // Version 0
writer.WriteInt32(patch.MapID);
if (patch.MapInternalName != null)
writer.WriteAscii(patch.MapInternalName);
else
writer.WriteByte(0);
writer.WriteUTF16(patch.Name);
writer.WriteUTF16(patch.Description);
writer.WriteUTF16(patch.Author);
if (patch.Screenshot != null)
{
writer.WriteInt32(patch.Screenshot.Length);
writer.WriteBlock(patch.Screenshot);
}
else
{
writer.WriteInt32(0);
}
// Fill in the block size
long endPos = writer.Position;
writer.SeekTo(startPos + 4);
writer.WriteUInt32((uint)(endPos - startPos));
writer.SeekTo(endPos);
}
