ARchive old spec

WhiteMagic/ExternalReader.cs

@@ -42,7 +42,8 @@ public sealed class ExternalReader : MemoryBase
         }
 
         // Process.MainModule throws Win32Exception for a bitness-mismatched or protected
-        // target; a missing image base must not sink the whole reader.
+        // target. A missing image base must not sink the whole reader — callers can still
+        // use absolute addresses when ImageBase is unknown.
         try
         {
             _imageBase = process.MainModule?.BaseAddress ?? IntPtr.Zero;
@@ -65,18 +66,7 @@ public sealed class ExternalReader : MemoryBase
         if (isRelative)
             address = GetAbsolute(address);
 
-        byte[] buffer = new byte[count];
-        if (!NativeMethods.ReadProcessMemory(_handle, address, buffer, count, out nint bytesRead))
-        {
-            return [];
-        }
-
-        if ((int)bytesRead != count)
-        {
-            Array.Resize(ref buffer, (int)bytesRead);
-        }
-
-        return buffer;
+        return RpmHelper.ReadBytes(_handle, address, count);
     }
 
     /// <inheritdoc />
@@ -85,12 +75,7 @@ public sealed class ExternalReader : MemoryBase
         if (isRelative)
             address = GetAbsolute(address);
 
-        if (!NativeMethods.WriteProcessMemory(_handle, address, bytes, bytes.Length, out nint written))
-        {
-            return 0;
-        }
-
-        return (int)written;
+        return RpmHelper.WriteBytes(_handle, address, bytes);
     }
 
     /// <inheritdoc />