Add readfolder();

Done by a char array, a bit storage based attribute list (only does dir or nodir for now), and an amount of how many files there are

Current limit: 250 files per folder

source/meme/utils.c

@@ -1,8 +1,18 @@
+#include <string.h>
+#include <stdlib.h>
+#include <stdio.h>
 #include "../gfx/di.h"
 #include "../gfx/gfx.h"
 #include "../utils/btn.h"
 #include "../utils/util.h"
 #include "utils.h"
+#include "../libs/fatfs/ff.h"
+#include "../storage/sdmmc.h"
+
+#define OPTION1 (1 << 0)
+#define OPTION2 (1 << 1)
+#define OPTION3 (1 << 2)
+#define OPTION4 (1 << 3)
 
 void utils_gfx_init(){
     display_backlight_brightness(100, 1000);
@@ -18,4 +28,24 @@ void utils_waitforpower(){
         reboot_normal();
     else
         power_off();
+}
+
+int readfolder(char *items[], unsigned int *muhbits){
+    DIR dir;
+    FILINFO fno;
+    char path[100] = "sd:/";
+
+    if (f_opendir(&dir, path)) {
+        gfx_printf("\nFailed to open %s", path);
+    }
+
+    int i = 0;
+    while (!f_readdir(&dir, &fno) && fno.fname[0]){
+        size_t size = strlen(fno.fname) + 1;
+        items[i] = (char*) malloc (size);
+        strlcpy(items[i], fno.fname, size);
+        if (fno.fattrib & AM_DIR) muhbits[i] |= (OPTION1);
+        i++;
+    }
+    return i;
 }