[64DD] Saving support (MAME dump format only)

Replaces the loaded dump file with the new saved content

Source/Project64-core/N64System/N64Class.cpp

@@ -385,6 +385,13 @@ bool CN64System::EmulationStarting(CThread * thread)
             WriteTrace(TraceN64System, TraceDebug, "Game starting");
             g_BaseSystem->StartEmulation2(false);
             WriteTrace(TraceN64System, TraceDebug, "Game Done");
+            //PLACE TO ADD 64DD SAVING CODE
+            if (g_Disk != NULL)
+            {
+                g_Disk->SaveDiskImage();
+                //g_Notify->DisplayError(g_Disk->GetError());
+                WriteTrace(TraceN64System, TraceDebug, "64DD Save Done");
+            }
         }
         catch (...)
         {

Source/Project64-core/N64System/N64DiskClass.cpp

@@ -41,6 +41,40 @@ bool CN64Disk::LoadDiskImage(const char * FileLoc)
         g_Settings->SaveBool(GameRunning_LoadingInProgress, false);
     }
 
+    m_FileName = FileLoc;
+    return true;
+}
+
+bool CN64Disk::SaveDiskImage()
+{
+    ForceByteSwapDisk();
+
+    if (m_DiskFormat == DiskFormatMAME)
+    {
+        //If original file was MAME format, just copy
+        //SDK format protection
+        WriteTrace(TraceN64System, TraceDebug, "Trying to open %s", m_FileName);
+        m_DiskFile.Close();
+        if (!m_DiskFile.Open(m_FileName.c_str(), CFileBase::modeWrite))
+        {
+            WriteTrace(TraceN64System, TraceError, "Failed to open %s", m_FileName);
+            return false;
+        }
+
+        m_DiskFile.SeekToBegin();
+        if (!m_DiskFile.Write(m_DiskImage, MameFormatSize))
+        {
+            m_DiskFile.Close();
+            WriteTrace(TraceN64System, TraceError, "Failed to write file");
+            return false;
+        }
+    }
+    else if (m_DiskFormat == DiskFormatSDK)
+    {
+        //If original file was SDK format, we need to convert it back
+    }
+
+    m_DiskFile.Close();
     return true;
 }
 
@@ -101,6 +135,7 @@ bool CN64Disk::AllocateAndLoadDiskImage(const char * FileLoc)
     if (DiskFileSize == MameFormatSize)
     {
         //If Disk is MAME Format (size is constant, it should be the same for every file), then continue
+        m_DiskFormat = DiskFormatMAME;
         WriteTrace(TraceN64System, TraceDebug, "Disk File is MAME Format");
 
         if (!AllocateDiskImage(DiskFileSize))
@@ -144,6 +179,8 @@ bool CN64Disk::AllocateAndLoadDiskImage(const char * FileLoc)
     {
         //If Disk is SDK format (made with SDK based dumpers like LuigiBlood's, or Nintendo's, size is also constant)
         //We need to convert it.
+        m_DiskFormat = DiskFormatSDK;
+
         g_Notify->DisplayMessage(5, MSG_LOADING);
 
         //Allocate supported size
@@ -193,6 +230,21 @@ void CN64Disk::ByteSwapDisk()
     }
 }
 
+void CN64Disk::ForceByteSwapDisk()
+{
+    uint32_t count;
+
+    for (count = 0; count < m_DiskFileSize; count += 4)
+    {
+        m_DiskImage[count] ^= m_DiskImage[count + 3];
+        m_DiskImage[count + 3] ^= m_DiskImage[count];
+        m_DiskImage[count] ^= m_DiskImage[count + 3];
+        m_DiskImage[count + 1] ^= m_DiskImage[count + 2];
+        m_DiskImage[count + 2] ^= m_DiskImage[count + 1];
+        m_DiskImage[count + 1] ^= m_DiskImage[count + 2];
+    }
+}
+
 void CN64Disk::SetError(LanguageStringID ErrorMsg)
 {
     m_ErrorMsg = ErrorMsg;

Source/Project64-core/N64System/N64DiskClass.h

@@ -18,6 +18,7 @@ public:
     ~CN64Disk();
 
     bool    LoadDiskImage(const char * FileLoc);
+    bool    SaveDiskImage();
     static bool IsValidDiskImage(uint8_t Test[4]);
     uint8_t *  GetDiskAddress() { return m_DiskImage; }
     uint8_t *  GetDiskAddressBuffer() { return m_DiskImage + m_DiskBufAddress; }
@@ -30,11 +31,14 @@ private:
     bool   AllocateDiskImage(uint32_t DiskFileSize);
     bool   AllocateAndLoadDiskImage(const char * FileLoc);
     void   ByteSwapDisk();
+    void   ForceByteSwapDisk();
     void   SetError(LanguageStringID ErrorMsg);
     void   ConvertDiskFormat();
+    void   ConvertDiskFormatBack();
 
     //constant values
-    enum { ReadFromRomSection = 0x400000, MameFormatSize = 0x0435B0C0, SDKFormatSize = 0x03DEC800 };
+    enum { ReadFromRomSection = 0x400000, MameFormatSize = 0x0435B0C0, SDKFormatSize = 0x03DEC800,
+           DiskFormatMAME = 0x0, DiskFormatSDK = 0x1 };
 
     //class variables
     CFile m_DiskFile;
@@ -44,6 +48,7 @@ private:
     uint32_t m_DiskBufAddress;
     LanguageStringID m_ErrorMsg;
     stdstr m_FileName, m_DiskIdent;
+    uint8_t m_DiskFormat; //0 = MAME, 1 = SDK
 
     //disk convert
     #define SECTORS_PER_BLOCK	85