Initial case of card and region checks

Checks don't do anything yet aside from displaying warnings.

source/main.c

@@ -2,14 +2,16 @@
 #include <3ds.h>
 #include "editprofile.h"
 #include "main.h"
+#include "title.h"
 
 typedef enum {
     /* Default sort but its commented to make it easy on _my_ mind. */
-    MAIN_SCREEN = 0,
-    SELECT_SAVE = 1,
-    FUSION_OR_NOT = 2,
-    THE_WIZARD_IS_BUSY = 3,
-    SUCCESS = 4
+    MAIN_SCREEN,
+    VERSION_TO_EDIT,
+    SELECT_SAVE,
+    FUSION_OR_NOT,
+    THE_WIZARD_IS_BUSY,
+    SUCCESS
 }States;
 
 int main() {
@@ -21,9 +23,11 @@ int main() {
     consoleSelect(&topScreen);
 
     States state = MAIN_SCREEN;
-    int profile_num;
+    int profile_num = 0;
     int fusion_mode = 0;
     int not_busy = 1;
+    int version_undetermined = 1;
+    u32 lowid;
 
     printf("Metroid: SAMUS RETURNS amiibo unlocker v0.2-alpha\nThis unlocker is in ALPHA. Bugs and stuff are expected.\nPress A to continue.\n");
 
@@ -41,9 +45,24 @@ int main() {
             if (kDown & KEY_A) 
             {
                 printSaveSelect();
-                state = SELECT_SAVE;
+                state = VERSION_TO_EDIT;
             }
         }
+
+        if (state == VERSION_TO_EDIT)
+        {
+            if (version_undetermined)
+            {
+                lowid = title_check();
+                if (lowid != 0) {
+                    state = SELECT_SAVE;
+                } else {
+                    printf("Could not determine version automatically.\n");
+                    version_undetermined = 1;
+                }
+            }
+        }
+
         if (state == SELECT_SAVE) // State 1 = Save select
         {
             if (kDown & KEY_Y) // Save 1 was chosen
@@ -89,7 +108,7 @@ int main() {
             if(R_FAILED(res)) {
                 int cursorX = topScreen.cursorX;
                 int cursorY = topScreen.cursorY;
-                printf("\x1b[30;16H%4lx\n", res);
+                printf("\x1b[s\x1b[30;16H%4lx\n\x1b[u", res);
                 topScreen.cursorX = cursorX;
                 topScreen.cursorY = cursorY;
                 printf("Something went wrong, please see the error message below.\n");
@@ -107,7 +126,6 @@ int main() {
     }
 
     cfguExit();
-    fsExit();
     gfxExit();
     return 0;
 }

source/title.c

@@ -0,0 +1,73 @@
+#include <3ds.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include "title.h"
+
+/*
+* title_check
+* returns lowid if it can be automagically determined. otherwise returns 0
+*/
+u32 title_check()
+{
+    u64 title_id; // This is for checking the title ID
+    u32 lowid = 0; // This is to be returned at the end.
+
+    u32 titles_read;
+    u32 title_count;
+
+    // Start by checking for the inserted card.
+    bool card_inserted;
+    FSUSER_CardSlotIsInserted(&card_inserted);
+    amInit();
+    if (card_inserted)
+    {
+        // Card found? Great, prioritize that.
+        AM_GetTitleList(&titles_read, MEDIATYPE_GAME_CARD, 1, &title_id);
+        int title_valid = valid_title(title_id, &lowid);
+        if (title_valid)
+        {
+            printf("Located a game card copy of SR, using that.\n");
+            // Title valid? No point in continuing, lets give the lowid back.
+            return lowid;
+        }
+    }
+
+    // No/Invalid card found.
+    u64* sd_titles;
+    int title_valid;
+    AM_GetTitleCount(MEDIATYPE_SD, &title_count);
+    sd_titles = malloc(title_count * sizeof(u64));
+    AM_GetTitleList(&titles_read, MEDIATYPE_SD, title_count, sd_titles);
+    for (unsigned int i = 0; i < title_count; ++i)
+    {
+        title_valid = valid_title(sd_titles[i], &lowid);
+        if (title_valid) {
+            printf("Located game copy with lowid: %ld\n", lowid);
+            break;
+        }
+    }
+
+    amExit();
+    return 0;
+}
+
+int valid_title(u64 title_id, u32 *lowid)
+{
+    switch(title_id)
+    {
+        case 0x00040000001BB200:
+            *lowid = 0x001BB200;
+            return 1;
+
+        case 0x00040000001BFB00:
+            *lowid = 0x001BFB00;
+            return 1;
+
+        case 0x00040000001BFC00:
+            *lowid = 0x001BFC00;
+            return 1;
+
+        default:
+            return 0;
+    }
+}

source/title.h

@@ -0,0 +1,4 @@
+#include <3ds.h>
+#include <stdio.h>
+u32 title_check();
+int valid_title(u64 title_id, u32 *lowid);