Start of rewrite

Based on lockpick_rcm 1.9.0

source/fs/fsutils.c

@@ -0,0 +1,38 @@
+#include <mem/heap.h>
+#include <string.h>
+#include "fsutils.h"
+#include "../utils/utils.h"
+#include <utils/sprintf.h>
+#include <libs/fatfs/ff.h>
+
+char *CombinePaths(const char *current, const char *add){
+    char *ret;
+
+    size_t size = strlen(current) + strlen(add) + 2;
+    ret = (char*) malloc (size);
+
+    sprintf(ret, (current[strlen(current) - 1] == '/') ? "%s%s" : "%s/%s", current, add);
+
+    return ret;
+}
+
+char *EscapeFolder(char *current){
+    char *ret;
+    char *temp;
+
+    ret = CpyStr(current);
+    temp = strrchr(ret, '/');
+
+    if (*(temp - 1) == ':')
+        temp++;
+
+    *temp = '\0';
+
+    return ret;
+}
+
+u64 GetFileSize(char *path){
+    FILINFO fno;
+    f_stat(path, &fno);
+    return fno.fsize;
+}