private bool CompareScripts(Script orig, Script mod)
{
bool index = orig.RootExpressionIndex.IsValid && mod.RootExpressionIndex.IsValid;
int origHash = SequenceHash.GetSequenceHashCode(orig.Parameters);
int modHash = SequenceHash.GetSequenceHashCode(mod.Parameters);
return(index && (orig.Name == mod.Name) && (orig.ExecutionType == mod.ExecutionType) &&
(orig.ReturnType == mod.ReturnType) && (origHash == modHash));
}
private void WriteScripts(ScriptData data, IStream stream, StructureValueCollection scnr)
{
ScriptLayout layout;
if (_buildInfo.Name.Contains("Halo: Reach"))
{
layout = ScriptLayout.HaloReach;
}
else if (_buildInfo.Name.Contains("Halo 3") || _buildInfo.Name.Contains("Halo ODST"))
{
layout = ScriptLayout.Halo3;
}
else
{
throw new NotImplementedException("Saving this game's scripts is not supported yet.");
}
Dictionary <int, uint> newParamAddresses = WriteParams(data, stream, scnr);
StructureLayout scrlayout = _buildInfo.Layouts.GetLayout("script element");
int oldScriptCount = (int)scnr.GetInteger("number of scripts");
int newScriptCount = data.Scripts.Count;
uint oldScriptAddress = (uint)scnr.GetInteger("script table address");
long expOldScriptAddress = _expander.Expand(oldScriptAddress);
long newScriptAddress = 0;
int oldScriptSize = oldScriptCount * scrlayout.Size;
int newScriptSize = newScriptCount * scrlayout.Size;
// get new Script Address
if (newScriptCount > 0)
{
if (oldScriptCount > 0)
{
newScriptAddress = _allocator.Reallocate(expOldScriptAddress, oldScriptSize, newScriptSize, stream);
}
else
{
newScriptAddress = _allocator.Allocate(newScriptSize, stream);
}
stream.SeekTo(_metaArea.PointerToOffset(newScriptAddress));
// write scripts
foreach (var scr in data.Scripts)
{
int paramCount = scr.Parameters.Count;
if (paramCount > 0)
{
int hash = SequenceHash.GetSequenceHashCode(scr.Parameters);
if (newParamAddresses.TryGetValue(hash, out uint addr))
{
scr.Write(stream, _stringIDs, paramCount, addr, layout);
}
else
{
throw new KeyNotFoundException("Failed to retrieve the address for a new parameter block.");
}
}
else
{
scr.Write(stream, _stringIDs, 0, 0, layout);
}
}
}
else
{
if (oldScriptCount > 0)
{
_allocator.Free(expOldScriptAddress, oldScriptSize);
}
}
scnr.SetInteger("number of scripts", (uint)data.Scripts.Count);
scnr.SetInteger("script table address", _expander.Contract(newScriptAddress));
}
/// <summary>
/// Frees the old Script Parameters and writes new ones to the stream.
/// </summary>
/// <param name="data">The new script data</param>
/// <param name="stream">The stream to write to</param>
/// <param name="scnr">scnr Meta Data</param>
/// <returns>A dictionary containing the hashes of parameter groups an their new addresses.</returns>
private Dictionary <int, uint> WriteParams(ScriptData data, IStream stream, StructureValueCollection scnr)
{
StructureLayout scrlayout = _buildInfo.Layouts.GetLayout("script element");
StructureLayout paramlayout = _buildInfo.Layouts.GetLayout("script parameter element");
int oldScriptCount = (int)scnr.GetInteger("number of scripts");
uint oldScriptAddress = (uint)scnr.GetInteger("script table address");
long expOldScriptAddress = _expander.Expand(oldScriptAddress);
int oldParamSize = 0;
StructureValueCollection[] oldScripts = TagBlockReader.ReadTagBlock(stream, oldScriptCount, expOldScriptAddress, scrlayout, _metaArea);
HashSet <uint> freedParamAddresses = new HashSet <uint>();
int oldTotalParamCount = 0;
// loop through old scripts
for (int i = 0; i < oldScripts.Length; i++)
{
int paramCount = (int)oldScripts[i].GetInteger("number of parameters");
uint addr = (uint)oldScripts[i].GetInteger("address of parameter list");
oldTotalParamCount += paramCount;
// free params
if (addr != 0 && !freedParamAddresses.Contains(addr))
{
long exp = _expander.Expand(addr);
int blockSize = paramCount * paramlayout.Size;
_allocator.Free(exp, blockSize);
oldParamSize += blockSize;
freedParamAddresses.Add(addr);
}
}
int newTotalParamCount = 0;
int newParamSize = 0;
Dictionary <int, uint> newParamAddresses = new Dictionary <int, uint>();
// loop through new scripts
foreach (var scr in data.Scripts)
{
int count = scr.Parameters.Count;
if (count > 0)
{
int paramHash = SequenceHash.GetSequenceHashCode(scr.Parameters);
if (!newParamAddresses.ContainsKey(paramHash))
{
long newAddr = _allocator.Allocate(paramlayout.Size * count, stream);
uint conNewAddr = _expander.Contract(newAddr);
stream.SeekTo(_metaArea.PointerToOffset(newAddr));
// write params to stream
foreach (var par in scr.Parameters)
{
par.Write(stream);
}
newParamAddresses.Add(paramHash, conNewAddr);
newParamSize += scr.Parameters.Count * 36;
}
}
newTotalParamCount += scr.Parameters.Count;
}
return(newParamAddresses);
}