Replace jerry_port_path_normalize,jerry_port_path_free,jerry_port_path_base with jerry_port_path_style,jerry_port_get_cwd

Partially fixes jerryscript-project#4979
Closes: jerryscript-project#4983

JerryScript-DCO-1.0-Signed-off-by: Yonggang Luo [email protected]

Author: lygstate

docs/05.PORT-API.md

@@ -163,52 +163,26 @@ void jerry_port_line_free (jerry_char_t *buffer_p);
 
 ## Filesystem
 
-```
-/**
- * Canonicalize a file path.
- *
- * If possible, the implementation should resolve symbolic links and other directory references found in the input path,
- * and create a fully canonicalized file path as the result.
- *
- * The function may return with NULL in case an error is encountered, in which case the calling operation will not
- * proceed.
- *
- * The implementation should allocate storage for the result path as necessary. Non-NULL return values will be passed
- * to `jerry_port_path_free` when the result is no longer needed by the caller, which can be used to finalize
- * dynamically allocated buffers.
- *
- * NOTE: The implementation must not return directly with the input, as the input buffer is released after the call.
- *
- * @param path_p: zero-terminated string containing the input path
- * @param path_size: size of the input path string in bytes, excluding terminating zero
- *
- * @return buffer with the normalized path if the operation is successful,
- *         NULL otherwise
- */
-jerry_char_t *jerry_port_path_normalize (const jerry_char_t *path_p, jerry_size_t path_size);
-```
-
 ```c
 /**
- * Free a path buffer returned by jerry_port_path_normalize.
+ * Get the path style of the current OS
  *
- * @param path_p: the path buffer to free
+ * @return path style
  */
-void jerry_port_path_free (jerry_char_t *path_p);
+jerry_path_style_t jerry_port_path_style (void);
 ```
 
 ```c
 /**
- * Get the offset of the basename component in the input path.
- *
- * The implementation should return the offset of the first character after the last path separator found in the path.
- * This is used by the caller to split the path into a directory name and a file name.
- *
- * @param path_p: input zero-terminated path string
+ * Get the current working directory, the output string will be zero-terminated
  *
- * @return offset of the basename component in the input path
+ * @param path_p When path_p is `NULL`, or the `path_size` is not enough,
+ *               return size of current working directory, otherwise fill the
+ *               path_p with current working directory, '\0` terminator also filled.
+ * @param path_size the `path_p` buffer size, including '\0` terminator
+ * @return The size of current working directory, excluding '\0' terminator
  */
-jerry_size_t jerry_port_path_base (const jerry_char_t *path_p);
+jerry_size_t jerry_port_get_cwd (jerry_char_t *path_p, jerry_size_t path_size);
 ```
 
 ```c