-Noticed a couple of files with missing copyrights. I hope it's correct now.

-Added support for importing *.duc files. You just have to call NDS_ImportSave with a valid filename specified and it should load any *.duc file

desmume/src/NDSSystem.c

@@ -250,21 +250,19 @@ int NDS_LoadROM(const char *filename, int bmtype, u32 bmsize)
 
    // Setup Backup Memory
    if(type == ROM_DSGBA)
+   {
 	   /* be sure that we dont overwrite anything before stringstart */
 	   if (strlen(noext)>= strlen(DSGBA_EXTENSTION))
-	   {
                    strncpy(noext + strlen(noext) - strlen(DSGBA_EXTENSTION), ".sav",strlen(DSGBA_EXTENSTION)+1);
-	   } else
+           else
-	   {
 		   return -1 ;
    }
    else
+   {
 	   /* be sure that we dont overwrite anything before stringstart */
 	   if (strlen(noext)>=4)
-	   {
                    strncpy(noext + strlen(noext) - 4, ".sav",5);
-	   } else
+           else
-	   {
 		   return -1 ;
    }
 
@@ -446,6 +444,17 @@ void NDS_Reset(void)
    execute = oldexecute;
 }
 
+int NDS_ImportSave(const char *filename)
+{
+   if (strlen(filename) < 4)
+      return 0;
+
+   if (memcmp(filename+strlen(filename)-4, ".duc", 4) == 0)
+      return mc_load_duc(&MMU.bupmem, filename);
+
+   return 0;
+}
+
 typedef struct
 {
     u32 size;

desmume/src/mc.c

@@ -1,3 +1,23 @@
+/*  Copyright (C) 2006 thoduv
+    Copyright (C) 2006-2007 Theo Berkau
+
+    This file is part of DeSmuME
+
+    DeSmuME 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.
+
+    DeSmuME 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 DeSmuME; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
 #include <stdlib.h>
 #include "debug.h"
 #include "types.h"
@@ -61,8 +81,8 @@ u8 *mc_alloc(memory_chip_t *mc, u32 size)
 	u8 *buffer;
 	buffer = malloc(size);
 	
-	if(!buffer) { return NULL; }
         mc->data = buffer;
+	if(!buffer) { return NULL; }
         mc->size = size;
         mc->writeable_buffer = TRUE;
 }
@@ -194,6 +214,54 @@ void mc_load_file(memory_chip_t *mc, const char* filename)
    mc->fp = file;
 }
 
+int mc_load_duc(memory_chip_t *mc, const char* filename)
+{
+   long size;
+   int type;
+   char id[16];
+   FILE* file = fopen(filename, "rb");
+   if(file == NULL)
+      return 0;
+
+   fseek(file, 0, SEEK_END);
+   size = ftell(file) - 500;
+   fseek(file, 0, SEEK_SET);
+
+   // Make sure we really have the right file
+   fread((void *)id, sizeof(char), 16, file);
+
+   if (memcmp(id, "ARDS000000000001", 16) != 0)
+   {
+      fclose(file);
+      return 0;
+   }
+
+   // Alright, it's time to load the file
+   if (mc->type == MC_TYPE_AUTODETECT)
+   {
+      if (size == MC_SIZE_4KBITS)
+         type = MC_TYPE_EEPROM1;
+      else if (size == MC_SIZE_64KBITS)
+         type = MC_TYPE_EEPROM2;
+      else if (size == MC_SIZE_256KBITS)
+         type = MC_TYPE_FRAM;
+      else if (size == MC_SIZE_512KBITS)
+         type = MC_TYPE_EEPROM2;
+      else if (size >= MC_SIZE_2MBITS)
+         type = MC_TYPE_FLASH;
+      mc_realloc(mc, type, size);
+   }
+
+   if (size > mc->size)
+      size = mc->size;
+   // Skip the rest of the header since we don't need it
+   fseek(file, 500, SEEK_SET);
+   fread (mc->data, 1, size, file);
+   fclose(file);
+
+   return 1;
+}
+
 u8 fw_transfer(memory_chip_t *mc, u8 data)
 {
         if(mc->com == FW_CMD_READ || mc->com == FW_CMD_PAGEWRITE) /* check if we are in a command that needs 3 bytes address */

desmume/src/mc.h

@@ -1,3 +1,23 @@
+/*  Copyright (C) 2006 thoduv
+    Copyright (C) 2006 Theo Berkau
+
+    This file is part of DeSmuME
+
+    DeSmuME 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.
+
+    DeSmuME 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 DeSmuME; if not, write to the Free Software
+    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
 #ifndef __FW_H__
 #define __FW_H__
 
@@ -60,6 +80,7 @@ void mc_init(memory_chip_t *mc, int type);    /* reset and init values for memor
 u8 *mc_alloc(memory_chip_t *mc, u32 size);  /* alloc mc memory */
 void mc_realloc(memory_chip_t *mc, int type, u32 size);      /* realloc mc memory */
 void mc_load_file(memory_chip_t *mc, const char* filename); /* load save file and setup fp */
+int mc_load_duc(memory_chip_t *mc, const char* filename); /* load Action Replay DS save file */
 void mc_free(memory_chip_t *mc);    /* delete mc memory */
 void mc_reset_com(memory_chip_t *mc);       /* reset communication with mc */
 u8 fw_transfer(memory_chip_t *mc, u8 data); /* transfer to, then receive data from firmware */