Imported Upstream version 60upstream/60

1 files changed, 46 insertions, 0 deletions

diff --git a/src/pkg/path/filepath/path_windows.go b/src/pkg/path/filepath/path_windows.go
new file mode 100644
index 000000000..2535697fd
--- /dev/null
+++ b/src/pkg/path/filepath/path_windows.go
@@ -0,0 +1,46 @@
+// Copyright 2010 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package filepath
+
+import "strings"
+
+// IsAbs returns true if the path is absolute.
+func IsAbs(path string) (b bool) {
+	v := VolumeName(path)
+	if v == "" {
+		return false
+	}
+	path = path[len(v):]
+	if path == "" {
+		return false
+	}
+	return path[0] == '/' || path[0] == '\\'
+}
+
+// VolumeName returns leading volume name.  
+// Given "C:\foo\bar" it returns "C:" under windows.
+// On other platforms it returns "".
+func VolumeName(path string) (v string) {
+	if len(path) < 2 {
+		return ""
+	}
+	// with drive letter
+	c := path[0]
+	if path[1] == ':' &&
+		('0' <= c && c <= '9' || 'a' <= c && c <= 'z' ||
+			'A' <= c && c <= 'Z') {
+		return path[:2]
+	}
+	return ""
+}
+
+// HasPrefix tests whether the path p begins with prefix.
+// It ignores case while comparing.
+func HasPrefix(p, prefix string) bool {
+	if strings.HasPrefix(p, prefix) {
+		return true
+	}
+	return strings.HasPrefix(strings.ToLower(p), strings.ToLower(prefix))
+}