Implement mapping from file offset to virtual address (all file formats)

Il2CppInspector.Common/FileFormatReaders/FileFormatReader.cs

@@ -35,6 +35,8 @@ namespace Il2CppInspector
         long[] ReadMappedWordArray(ulong uiAddr, int count);
         uint MapVATR(ulong uiAddr);
         bool TryMapVATR(ulong uiAddr, out uint fileOffset);
+        ulong MapFileOffsetToVA(uint offset);
+        bool TryMapFileOffsetToVA(uint offset, out ulong va);
 
         byte[] ReadBytes(int count);
         ulong ReadUInt64();
@@ -159,6 +161,22 @@ namespace Il2CppInspector
             }
         }
 
+        // Map an offset into the file image to an RVA
+        // No mapping by default
+        public virtual ulong MapFileOffsetToVA(uint offset) => offset;
+
+        // Try to map an offset into the file image to an RVA
+        public bool TryMapFileOffsetToVA(uint offset, out ulong va) {
+            try {
+                va = MapFileOffsetToVA(offset);
+                return true;
+            }
+            catch (InvalidOperationException) {
+                va = 0;
+                return false;
+            }
+        }
+
         // Read a file format dependent word (32 or 64 bits)
         // The primitive mappings in Bin2Object will automatically read a uint if the file is 32-bit
         public long ReadWord() => ReadObject<long>();