io: path: add b_path_duplicate()

io/include/blue/io/path.h

@@ -8,7 +8,7 @@
 
 #define B_PATH(p)       ((b_path *)p)
 
-#define B_RV_PATH(cstr) B_RV(b_path_create_from_str(cstr))
+#define B_RV_PATH(cstr) B_PATH(B_RV(b_path_create_from_cstr(cstr)))
 
 struct b_file_info;
 
@@ -18,6 +18,7 @@ BLUE_API b_path *b_path_create();
 BLUE_API b_path *b_path_create_root();
 BLUE_API b_path *b_path_create_cwd();
 BLUE_API b_path *b_path_create_from_cstr(const char *path);
+BLUE_API b_path *b_path_duplicate(const b_path *path);
 
 BLUE_API b_path *b_path_join(const b_path *paths[], size_t nr_paths);
 

io/sys/darwin/path.c

@@ -120,6 +120,22 @@ struct b_path *b_path_create_from_cstr(const char *cstr)
 	return path;
 }
 
+struct b_path *b_path_duplicate(const struct b_path *path)
+{
+	struct b_path *new_path = b_path_create();
+	if (!path) {
+		return NULL;
+	}
+
+	new_path->pathstr = b_string_duplicate(path->pathstr);
+	if (!new_path->pathstr) {
+		b_path_release(new_path);
+		return NULL;
+	}
+
+	return new_path;
+}
+
 static void append_path(struct b_path *dest, const struct b_path *src)
 {
 	if (b_path_is_absolute(src)) {