add fileio.parent()

Author: scivision

+stdlib/+fileio/parent.m

@@ -0,0 +1,10 @@
+function p = parent(path)
+% PARENT parent directory of path
+arguments
+  path string
+end
+
+% must drop trailing slash - need to as_posix for windows
+p = fileparts(strip(stdlib.fileio.posix(path), 'right', '/'));
+
+end

+stdlib/+test/TestFilePure.m

@@ -14,6 +14,19 @@ function test_posix(tc)
 end
 
 
+function test_parent(tc)
+
+tc.assertEmpty(stdlib.fileio.parent(string.empty))
+tc.verifyEqual(stdlib.fileio.parent(""), "")
+
+tc.verifyEqual(stdlib.fileio.parent("/foo/bar/baz"), "/foo/bar")
+tc.verifyEqual(stdlib.fileio.parent("/foo/bar/baz/"), "/foo/bar")
+
+tc.verifyEqual(stdlib.fileio.parent("foo/bar/baz/"), "foo/bar")
+
+end
+
+
 function test_path_tail(tc)
 
 import stdlib.path_tail

+stdlib/parent.m

@@ -0,0 +1,9 @@
+function p = parent(path)
+% PARENT parent of path
+arguments
+  path string
+end
+
+p = stdlib.fileio.parent(path);
+
+end