io: define SeekStart, SeekCurrent, SeekEnd constants for use with Seeker
Fixes #6885
Change-Id: I6907958186f6a2427da1ad2f6c20bd5d7bf7a3f9
Reviewed-on: https://go-review.googlesource.com/19862
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
diff --git a/src/io/io.go b/src/io/io.go
index f7f059f..6e33192 100644
--- a/src/io/io.go
+++ b/src/io/io.go
@@ -16,6 +16,13 @@
"errors"
)
+// Seek whence values.
+const (
+ SeekStart = 0 // seek relative to the origin of the file
+ SeekCurrent = 1 // seek relative to the current offset
+ SeekEnd = 2 // seek relative to the end
+)
+
// ErrShortWrite means that a write accepted fewer bytes than requested
// but failed to return an explicit error.
var ErrShortWrite = errors.New("short write")
