From 4b337a024b5bae42000b8c70bbbbcfd28b728817 Mon Sep 17 00:00:00 2001
From: Christian Semmler <mail@csemmler.com>
Date: Mon, 26 Jun 2023 13:44:55 +0200
Subject: [PATCH] some accuracy improvements

---
 LEGO1/mxdsfile.cpp | 20 +++++++++++---------
 LEGO1/mxioinfo.cpp |  2 +-
 LEGO1/mxioinfo.h   |  2 +-
 3 files changed, 13 insertions(+), 11 deletions(-)

diff --git a/LEGO1/mxdsfile.cpp b/LEGO1/mxdsfile.cpp
index cf37e187..1f268a2f 100644
--- a/LEGO1/mxdsfile.cpp
+++ b/LEGO1/mxdsfile.cpp
@@ -27,26 +27,28 @@ long MxDSFile::Open(unsigned long uStyle)
 {
   // No idea what's stopping this one matching, but I'm pretty
   // confident it has the correct behavior.
+  long longResult = 1;
   memset(&m_io, 0, sizeof(MXIOINFO));
+
   if (m_io.Open(m_filename.GetData(), uStyle) != 0) {
     return -1;
   }
 
-  m_io.SetBuffer(NULL, 0);
+  m_io.SetBuffer(NULL, 0, 0);
   m_position = 0;
 
-  long longResult = 1;
-  if (m_skipReadingChunks == 0)
-  {
+  if (m_skipReadingChunks == 0) {
     longResult = ReadChunks();
   }
-  if (longResult != 0)
-  {
+
+  if (longResult != 0) {
     Close(); // vtable + 0x18
-    return longResult;
   }
-  Seek(0, 0); // vtable + 0x24
-  return 0;
+  else {
+    Seek(0, 0); // vtable + 0x24
+  }
+
+  return longResult;
 }
 
 // OFFSET: LEGO1 0x100cc780
diff --git a/LEGO1/mxioinfo.cpp b/LEGO1/mxioinfo.cpp
index 374eaedb..48b0c57e 100644
--- a/LEGO1/mxioinfo.cpp
+++ b/LEGO1/mxioinfo.cpp
@@ -37,7 +37,7 @@ LONG MXIOINFO::Seek(LONG lOffset, int iOrigin)
 }
 
 // OFFSET: LEGO1 0x100ccbc0
-void MXIOINFO::SetBuffer(LPSTR pchBuffer, LONG cchBuffer)
+void MXIOINFO::SetBuffer(LPSTR pchBuffer, LONG cchBuffer, LONG unk)
 {
   
 }
diff --git a/LEGO1/mxioinfo.h b/LEGO1/mxioinfo.h
index 27aa482d..59ee3807 100644
--- a/LEGO1/mxioinfo.h
+++ b/LEGO1/mxioinfo.h
@@ -13,7 +13,7 @@ class MXIOINFO
   void Close(long arg);
   LONG Seek(LONG lOffset, int iOrigin);
   unsigned long Read(HPSTR pch, LONG cch);
-  void SetBuffer(LPSTR pchBuffer, LONG cchBuffer);
+  void SetBuffer(LPSTR pchBuffer, LONG cchBuffer, LONG unk);
   unsigned short Descend(LPMMCKINFO pmmcki, const MMCKINFO *pmmckiParent, UINT fuDescend);
 
   MMIOINFO m_info;