LLFS

add llfs_get_filename_ext

project/Core/Inc/llfs.h

@@ -83,4 +83,11 @@ llfs_file_t* llfs_next_file(void** mem, char* filter);
  */
 size_t llfs_file_count(void);
 
+/**
+ * @brief This function returns the extension of a file
+ * @param[in] filename The filename to get the extension from
+ * @return char* The extension of the file
+ */
+char* llfs_get_filename_ext(char* filename);
+
 #endif // LLFS_H

project/Core/Src/llfs.c

@@ -141,6 +141,13 @@ size_t llfs_file_count(void) {
     return file_count;
 }
 
+char* llfs_get_filename_ext(char* filename) {
+    char* dot = strrchr(filename, '.');
+    if (dot == NULL || dot == filename)
+        return NULL;
+    return dot + 1;
+}
+
 #ifndef TESTING
 /**
  * @brief Newlib open implementation