REDCODE/BlenderSharp
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Fixed various pointer problems

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mm00
2025-03-12 19:56:34 +01:00
parent ba61ea59f9
commit a7337dd1d6
1 changed files with 24 additions and 3 deletions
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27
BlendFile/Reader.cs
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@@ -49,7 +49,14 @@ public class Reader {
/// </summary>
/// <param name="memAddr">memory address in current system endianness</param>
/// <returns>A <see cref="Kaitai.BlendFile.FileBlock"/> object</returns>
public FileBlock? GetBlock(long memAddr) => memBlocks.SkipWhile(x => x.Key < memAddr).FirstOrDefault().Value;
public FileBlock? GetBlock(long memAddr)
{
var blocks = OrderedBlocks.Where(x =>
memAddr >= x.MemAddr.ToPointer() && memAddr < x.MemAddr.ToPointer() + x.LenBody);
return blocks.MaxBy(x => x.LenBody);
}
/// <summary>
/// Creates a new instance of the <see cref="Reader"/> class
@@ -59,6 +66,8 @@ public class Reader {
_path = path;
}
public List<FileBlock> OrderedBlocks;
/// <summary>
/// Creates a new instance of the <see cref="Reader"/> class
/// </summary>
@@ -82,7 +91,16 @@ public class Reader {
var file = new KaitaiStream(_path);
var blend = new Kaitai.BlendFile(file);
Console.WriteLine($"Start offset: 0x{blend.Blocks[0].MemAddr.ToPointer():X}");
OrderedBlocks = blend.Blocks.OrderBy(x => x.MemAddr.ToPointer()).ToList();
var startAddr = OrderedBlocks.Skip(1).SkipWhile(x => x.Code != "DNA1").First().MemAddr.ToPointer();
var endAddr = OrderedBlocks.Last().MemAddr.ToPointer();
Console.WriteLine($"Start offset: 0x{startAddr:X}");
Console.WriteLine($"End offset: 0x{endAddr:X}");
Console.WriteLine($"Size in MB: {((endAddr - startAddr) / 1024 / 1024)}");
bool isLe = blend.Hdr.Endian == Endian.Le;
//TODO: two blocks somehow have the same mem address... this sounds wrong.
@@ -130,6 +148,9 @@ public class Reader {
// get the pointer value
var addr = GetBlockFieldDataOffset(obj.Key.Item1, f.GetCustomAttribute<DNAFieldAttribute>()!.OriginalIndex,
fieldInfo);
// dereference the pointer
addr = pointers.GetValueOrDefault(addr);
if (addr == IntPtr.Zero) continue; // null pointer
// get the object that the pointer is pointing to if we've already converted it
var newobj = objects.GetValueOrDefault((addr, f.FieldType));
if (newobj != null)
@@ -140,7 +161,6 @@ public class Reader {
if (newobj != null) {
FillObject(addr, ref newobj, f.FieldType.GetFields());
f.SetValue(obj.Value, newobj);
Objects.Add((addr, f.FieldType), newobj);
} // should never happen
else throw new NotSupportedException($"Type \"{f.FieldType}\" is unknown");
}
@@ -298,6 +318,7 @@ public class Reader {
for (int i = 0; i < arrayAttribute.Size; i += 8) {
var itemData = new byte[8];
Array.Copy(data, i, itemData, 0, 8);
if(itemData.ToPointer() == IntPtr.Zero) continue;
object? cellData = ActivateInstance(type);
FillObject(itemData.ToPointer(), ref cellData, type.GetFields());