libgo: Update to weekly.2011-12-22.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@183150 138bc75d-0d04-0410-961f-82ee72b054a4

3 files changed, 93 insertions, 3 deletions

diff --git a/libgo/go/path/filepath/path.go b/libgo/go/path/filepath/path.go
index e3d6c342ca6..3dc52aab467 100644
--- a/libgo/go/path/filepath/path.go
+++ b/libgo/go/path/filepath/path.go
@@ -147,6 +147,7 @@ func SplitList(path string) []string {
 // separating it into a directory and file name component.
 // If there is no Separator in path, Split returns an empty dir
 // and file set to path.
+// The returned values have the property that path = dir+file.
 func Split(path string) (dir, file string) {
 	vol := VolumeName(path)
 	i := len(path) - 1
@@ -262,6 +263,8 @@ func Abs(path string) (string, error) {
 // Rel returns a relative path that is lexically equivalent to targpath when
 // joined to basepath with an intervening separator. That is,
 // Join(basepath, Rel(basepath, targpath)) is equivalent to targpath itself.
+// On success, the returned path will always be relative to basepath,
+// even if basepath and targpath share no elements.
 // An error is returned if targpath can't be made relative to basepath or if
 // knowing the current working directory would be necessary to compute it.
 func Rel(basepath, targpath string) (string, error) {
@@ -423,6 +426,8 @@ func Base(path string) string {
 	for len(path) > 0 && os.IsPathSeparator(path[len(path)-1]) {
 		path = path[0 : len(path)-1]
 	}
+	// Throw away volume name
+	path = path[len(VolumeName(path)):]
 	// Find the last element
 	i := len(path) - 1
 	for i >= 0 && !os.IsPathSeparator(path[i]) {
@@ -437,3 +442,25 @@ func Base(path string) string {
 	}
 	return path
 }
+
+// Dir returns the all but the last element of path, typically the path's directory.
+// Trailing path separators are removed before processing.
+// If the path is empty, Dir returns ".".
+// If the path consists entirely of separators, Dir returns a single separator.
+// The returned path does not end in a separator unless it is the root directory.
+func Dir(path string) string {
+	vol := VolumeName(path)
+	i := len(path) - 1
+	for i >= len(vol) && !os.IsPathSeparator(path[i]) {
+		i--
+	}
+	dir := Clean(path[len(vol) : i+1])
+	last := len(dir) - 1
+	if last > 0 && os.IsPathSeparator(dir[last]) {
+		dir = dir[:last]
+	}
+	if dir == "" {
+		dir = "."
+	}
+	return vol + dir
+}
diff --git a/libgo/go/path/filepath/path_test.go b/libgo/go/path/filepath/path_test.go
index b5b0dedcd40..63adcb88c46 100644
--- a/libgo/go/path/filepath/path_test.go
+++ b/libgo/go/path/filepath/path_test.go
@@ -422,14 +422,77 @@ var basetests = []PathTest{
 	{"a/b/c.x", "c.x"},
 }
 
+var winbasetests = []PathTest{
+	{`c:\`, `\`},
+	{`c:.`, `.`},
+	{`c:\a\b`, `b`},
+	{`c:a\b`, `b`},
+	{`c:a\b\c`, `c`},
+	{`\\host\share\`, `\`},
+	{`\\host\share\a`, `a`},
+	{`\\host\share\a\b`, `b`},
+}
+
 func TestBase(t *testing.T) {
-	for _, test := range basetests {
-		if s := filepath.ToSlash(filepath.Base(test.path)); s != test.result {
+	tests := basetests
+	if runtime.GOOS == "windows" {
+		// make unix tests work on windows
+		for i, _ := range tests {
+			tests[i].result = filepath.Clean(tests[i].result)
+		}
+		// add windows specific tests
+		tests = append(tests, winbasetests...)
+	}
+	for _, test := range tests {
+		if s := filepath.Base(test.path); s != test.result {
 			t.Errorf("Base(%q) = %q, want %q", test.path, s, test.result)
 		}
 	}
 }
 
+var dirtests = []PathTest{
+	{"", "."},
+	{".", "."},
+	{"/.", "/"},
+	{"/", "/"},
+	{"////", "/"},
+	{"/foo", "/"},
+	{"x/", "x"},
+	{"abc", "."},
+	{"abc/def", "abc"},
+	{"a/b/.x", "a/b"},
+	{"a/b/c.", "a/b"},
+	{"a/b/c.x", "a/b"},
+}
+
+var windirtests = []PathTest{
+	{`c:\`, `c:\`},
+	{`c:.`, `c:.`},
+	{`c:\a\b`, `c:\a`},
+	{`c:a\b`, `c:a`},
+	{`c:a\b\c`, `c:a\b`},
+	{`\\host\share\`, `\\host\share\`},
+	{`\\host\share\a`, `\\host\share\`},
+	{`\\host\share\a\b`, `\\host\share\a`},
+}
+
+func TestDir(t *testing.T) {
+	tests := dirtests
+	if runtime.GOOS == "windows" {
+		// make unix tests work on windows
+		for i, _ := range tests {
+			tests[i].result = filepath.Clean(tests[i].result)
+		}
+		// add windows specific tests
+		tests = append(tests, windirtests...)
+	}
+	for _, test := range tests {
+		if s := filepath.Dir(test.path); s != test.result {
+			t.Errorf("Dir(%q) = %q, want %q", test.path, s, test.result)
+		}
+	}
+}
+
 type IsAbsTest struct {
 	path  string
 	isAbs bool
diff --git a/libgo/go/path/filepath/path_unix.go b/libgo/go/path/filepath/path_unix.go
index daf0eb2af7c..c5ac71efe21 100644
--- a/libgo/go/path/filepath/path_unix.go
+++ b/libgo/go/path/filepath/path_unix.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// +build darwin freebsd linux openbsd
+// +build darwin freebsd linux netbsd openbsd
 
 package filepath