New stuff and small changes for upcoming ZMV code.

zsnes/src/numconv.h

@@ -0,0 +1,126 @@
+/*
+Copyright (C) 1997-2005 ZSNES Team ( zsKnight, _Demo_, pagefault, Nach )
+
+http://www.zsnes.com
+http://sourceforge.net/projects/zsnes
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later
+version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+*/
+
+#ifndef NUMCONV_H
+#define NUMCONV_H
+
+#include <stdio.h>
+
+//Get correct mask for particular bit
+#define BIT(X) (1 << X)
+
+/*
+Functions that the compiler should inline that will convert
+uint32, uint24, uint16 to 4 byte, 3 byte, 2 byte arrays
+and back. -Nach
+*/
+
+static unsigned char *uint32_to_bytes(unsigned int num)
+{
+  static unsigned char buffer[4];
+  buffer[3] = (num >> 24) & 0xFF;
+  buffer[2] = (num >> 16) & 0xFF;
+  buffer[1] = (num >> 8) & 0xFF;
+  buffer[0] = num & 0xFF;
+  return(buffer);
+}
+
+static unsigned int bytes_to_uint32(const unsigned char buffer[4])
+{
+  unsigned int num = (unsigned int)buffer[0];
+  num |= ((unsigned int)buffer[1]) << 8;
+  num |= ((unsigned int)buffer[2]) << 16;
+  num |= ((unsigned int)buffer[3]) << 24;
+  return(num);
+}
+
+static unsigned char *uint24_to_bytes(unsigned int num)
+{
+  static unsigned char buffer[3];
+  buffer[2] = (num >> 16) & 0xFF;
+  buffer[1] = (num >> 8) & 0xFF;
+  buffer[0] = num & 0xFF;
+  return(buffer);
+}
+
+static unsigned int bytes_to_uint24(const unsigned char buffer[3])
+{
+  unsigned int num = (unsigned int)buffer[0];
+  num |= ((unsigned int)buffer[1]) << 8;
+  num |= ((unsigned int)buffer[2]) << 16;
+  return(num);
+}
+
+static unsigned char *uint16_to_bytes(unsigned short num)
+{
+  static unsigned char buffer[2];
+  buffer[1] = (num >> 8) & 0xFF;
+  buffer[0] = num & 0xFF;
+  return(buffer);
+}
+
+static unsigned short bytes_to_uint16(const unsigned char buffer[2])
+{
+  unsigned short num = (unsigned short)buffer[0];
+  num |= ((unsigned short)buffer[1]) << 8;
+  return(num);
+}
+
+//Functions to read 2, 3, 4 bytes and convert to uint16, uint24, uint32
+static unsigned short fread2(FILE *fp)
+{
+  unsigned char uint16buf[2];
+  fread(uint16buf, 2, 1, fp);
+  return(bytes_to_uint16(uint16buf));
+}
+
+static unsigned int fread3(FILE *fp)
+{
+  unsigned char uint24buf[3];
+  fread(uint24buf, 3, 1, fp);
+  return(bytes_to_uint24(uint24buf));
+}
+
+static unsigned int fread4(FILE *fp)
+{
+  unsigned char uint32buf[4];
+  fread(uint32buf, 4, 1, fp);
+  return(bytes_to_uint32(uint32buf));
+}
+
+//Functions to write uint16, uint24, uint32 as 2, 3, 4 bytes
+static void fwrite2(unsigned short var, FILE *fp)
+{
+  fwrite(uint16_to_bytes(var), 2, 1, fp);
+}
+
+static void fwrite3(unsigned int var, FILE *fp)
+{
+  fwrite(uint24_to_bytes(var), 3, 1, fp);
+}
+
+static void fwrite4(unsigned int var, FILE *fp)
+{
+  fwrite(uint32_to_bytes(var), 4, 1, fp);
+}
+
+#endif

zsnes/src/zstate.c

@@ -667,6 +667,48 @@ void ResetOffset()
   Curtableaddr += (unsigned int)tableA;
 }
 
+void zst_save(FILE *fhandle, bool Thumbnail)
+{
+  fwrite(zst_header_cur, 1, sizeof(zst_header_cur)-1, fhandle); //-1 for null
+
+  PrepareOffset();
+  PrepareSaveState();
+  unpackfunct();
+
+  if (SFXEnable)
+  {
+    SfxRomBuffer -= SfxCROM;
+    SfxLastRamAdr -= SfxRAMMem;
+  }
+    
+  if (SA1Enable)
+  {
+    SaveSA1(); //Convert SA-1 stuff to standard, non displacement format
+  }
+     
+  copy_state_data(0, write_save_state_data, false);
+
+  if (SFXEnable)
+  {
+    SfxRomBuffer += SfxCROM;
+    SfxLastRamAdr += SfxRAMMem;
+  }
+
+  if (SA1Enable)
+  {
+    RestoreSA1(); //Convert back SA-1 stuff
+  }
+    
+  if (Thumbnail)
+  {
+    CapturePicture();
+    fwrite(PrevPicture, 1, 64*56*sizeof(unsigned short), fhandle);
+  }
+    
+  ResetOffset();
+  ResetState();
+}
+
 void statesaver()
 {
   //'Auto increment savestate slot' code
@@ -702,41 +744,7 @@ void statesaver()
   
   if ((fhandle = fopen(fnamest+1,"wb")))
   {    
-    fwrite(zst_header_cur, 1, sizeof(zst_header_cur)-1, fhandle); //-1 for null
+    zst_save(fhandle, (cbitmode && !NoPictureSave) ? true : false)
-
-    PrepareOffset();
-    PrepareSaveState();
-    unpackfunct();
-
-    if (SFXEnable)
-    {
-      SfxRomBuffer -= SfxCROM;
-      SfxLastRamAdr -= SfxRAMMem;
-    }
-    
-    if (SA1Enable)
-    {
-      SaveSA1(); //Convert SA-1 stuff to standard, non displacement format
-    }
-      
-    copy_state_data(0, write_save_state_data, false);
-
-    if (SFXEnable)
-    {
-      SfxRomBuffer += SfxCROM;
-      SfxLastRamAdr += SfxRAMMem;
-    }
-
-    if (SA1Enable)
-    {
-      RestoreSA1(); //Convert back SA-1 stuff
-    }
-    
-    if (cbitmode && !NoPictureSave)
-    {
-      CapturePicture();
-      fwrite(PrevPicture, 1, 64*56*sizeof(unsigned short), fhandle);
-    }
   
     fclose(fhandle);
   
@@ -752,9 +760,6 @@ void statesaver()
 
     Msgptr = txtsavemsg;
     MessageOn = MsgCount;
-  
-    ResetOffset();
-    ResetState();
   }  
   else
   {