private int TagGroup_CalculateChecksum(ITagGroup tagGroup)
{
int checksum = 0;
using (VirtualStream tagStream = new VirtualStream(TagGroupHeader.Size))
using (BinaryWriter writer = new BinaryWriter(tagStream))
{
tagGroup.Write(writer);
tagStream.Align(4);
if (tagStream.Length == 0)
{
return(0);
}
byte[] tagGroupBuffer = tagStream.ToArray();
checksum = BitConverter.ToInt32(tagGroupBuffer, 0);
for (int i = 1; i < tagGroupBuffer.Length / 4; i++)
{
checksum ^= BitConverter.ToInt32(tagGroupBuffer, i * 4);
}
}
return(checksum);
}
private void FixSystemLinkButton_Click(object sender, EventArgs e)
{
/*
* Heh I guess Entity is good for something :P
*/
//Prepare
ITagGroup tagGroup = null;
ITagGroup scenario = new Scenario();
ITagBlock scenarioBlock = null, simulationDefinitionTableElementBlock = null;
BlockField simulationDefinitionTableField = null;
List <IndexEntry> simulationDefinitionEntries = new List <IndexEntry>();
bool success = false;
//Build table
foreach (IndexEntry entry in Map.IndexEntries)
{
switch (entry.Root)
{
case "bipd":
case "bloc":
case "ctrl":
case "jpt!":
case "mach":
case "scen":
case "ssce":
case "vehi":
simulationDefinitionEntries.Add(entry);
break;
case "eqip":
case "garb":
case "proj":
simulationDefinitionEntries.Add(entry);
simulationDefinitionEntries.Add(entry);
break;
case "weap":
simulationDefinitionEntries.Add(entry);
simulationDefinitionEntries.Add(entry);
simulationDefinitionEntries.Add(entry);
break;
}
}
//Read scenario
using (BinaryReader reader = Map.Scenario.TagData.CreateReader())
{
reader.BaseStream.Seek((uint)Map.Scenario.PostProcessedOffset, SeekOrigin.Begin);
scenario.Read(reader);
}
//Re-create simulation definition table
scenarioBlock = scenario[0];
simulationDefinitionTableField = (BlockField)scenarioBlock[143];
simulationDefinitionTableField.BlockList.Clear();
foreach (IndexEntry entry in simulationDefinitionEntries)
{
//Attempt to add tag block
simulationDefinitionTableElementBlock = simulationDefinitionTableField.Add(out success);
if (success)
{
simulationDefinitionTableElementBlock[0].Value = entry.Id;
}
}
//Rebuild map
using (VirtualStream tagDataStream = new VirtualStream(Map.TagDataStream.MemoryAddress))
using (BinaryWriter writer = tagDataStream.CreateWriter())
using (BinaryReader reader = Map.TagDataStream.CreateReader())
{
//Loop
foreach (IndexEntry entry in Map.IndexEntries.Where(ie => ie.Offset > 0 && ie.Size > 0))
{
//Read (unless it's our modified scenario)
if (entry != Map.Scenario)
{
tagGroup = TagLookup.CreateTagGroup(entry.Root);
reader.BaseStream.Seek(entry.Offset, SeekOrigin.Begin);
tagGroup.Read(reader);
}
else
{
tagGroup = scenario;
}
//Create buffer
using (VirtualStream stream = new VirtualStream(tagDataStream.Position))
using (BinaryWriter tagWriter = stream.CreateWriter())
using (BinaryReader tagReader = stream.CreateReader())
{
//Write
tagGroup.Write(tagWriter);
//Recalculate raw addresses
Helper.RecalculateRawAddresses(entry.Raws, entry.Root, stream, tagReader, tagWriter);
//Setup tag
entry.Offset = (uint)stream.MemoryAddress;
entry.Size = (int)stream.Length;
//Write to tag data stream
writer.Write(stream.ToArray());
}
}
//Align
tagDataStream.Align(4096);
//Swap
Map.SwapTagBuffer(tagDataStream.ToArray(), tagDataStream.MemoryAddress);
}
}
