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Move index decoding to MetadataUsage

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This reduces code duplication between metadata usage index decoding and
vtable method index decoding.
This commit is contained in:
Robert Xiao
2020-06-16 20:02:44 -07:00
committed by Katy
parent d426dad820
commit 5d57b76735
2 changed files with 24 additions and 26 deletions
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21
Il2CppInspector.Common/IL2CPP/MetadataUsage.cs
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@@ -21,13 +21,28 @@ namespace Il2CppInspector
{
public MetadataUsageType Type { get; }
public int SourceIndex { get; }
public int DestinationIndex { get; }
public ulong VirtualAddress { get; private set; }
public MetadataUsage(MetadataUsageType type, int sourceIndex, int destinationIndex) {
public MetadataUsage(MetadataUsageType type, int sourceIndex) {
Type = type;
SourceIndex = sourceIndex;
DestinationIndex = destinationIndex;
}
public static MetadataUsage FromEncodedIndex(Il2CppInspector package, uint encodedIndex) {
uint index;
MetadataUsageType usageType;
if (package.Version < 19) {
/* These encoded indices appear only in vtables, and are decoded by IsGenericMethodIndex/GetDecodedMethodIndex */
var isGeneric = encodedIndex & 0x80000000;
index = package.Binary.VTableMethodReferences[encodedIndex & 0x7FFFFFFF];
usageType = (isGeneric != 0) ? MetadataUsageType.MethodRef : MetadataUsageType.MethodDef;
} else {
/* These encoded indices appear in metadata usages, and are decoded by GetEncodedIndexType/GetDecodedMethodIndex */
var encodedType = encodedIndex & 0xE0000000;
usageType = (MetadataUsageType)(encodedType >> 29);
index = encodedIndex & 0x1FFFFFFF;
}
return new MetadataUsage(usageType, (int)index);
}
public void SetAddress(ulong virtualAddress) => VirtualAddress = virtualAddress;