Rework ES2015 module system and add missing features. (#2792)

Co-authored-by: Dániel Bátyai <dbatyai@inf.u-szeged.hu>
JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Daniel Vince vinced@inf.u-szeged.hu

jerry-port/default/default-io.c

@@ -15,6 +15,7 @@
 
 #include <stdarg.h>
 #include <stdlib.h>
+#include <string.h>
 
 #include "jerryscript-port.h"
 #include "jerryscript-port-default.h"
@@ -194,3 +195,24 @@ jerry_port_release_source (uint8_t *buffer_p) /**< buffer to free */
 {
   free (buffer_p);
 } /* jerry_port_release_source */
+
+/**
+ * Normalize a file path
+ *
+ * @return length of the path written to the output buffer
+ */
+size_t
+jerry_port_normalize_path (const char *in_path_p, /**< input file path */
+                           char *out_buf_p,       /**< output buffer */
+                           size_t out_buf_size)   /**< size of output buffer */
+{
+  /* TODO: implement path normalization */
+  size_t len = strlen (in_path_p);
+  if (len + 1 > out_buf_size)
+  {
+    return 0;
+  }
+
+  strcpy (out_buf_p, in_path_p);
+  return len;
+} /* jerry_port_normalize_path */