Add a standard Seeker interface.
R=rsc
APPROVED=rsc
DELTA=35 (30 added, 4 deleted, 1 changed)
OCL=33491
CL=33498
diff --git a/src/pkg/io/io.go b/src/pkg/io/io.go
index e7f28a4..b38c0ef 100644
--- a/src/pkg/io/io.go
+++ b/src/pkg/io/io.go
@@ -59,6 +59,17 @@
Close() os.Error;
}
+// Seeker is the interface that wraps the basic Seek method.
+//
+// Seek sets the offset for the next Read or Write to offset,
+// interpreted according to whence: 0 means relative to the origin of
+// the file, 1 means relative to the current offset, and 2 means
+// relative to the end. Seek returns the new offset and an Error, if
+// any.
+type Seeker interface {
+ Seek(offset int64, whence int) (ret int64, err os.Error);
+}
+
// ReadWrite is the interface that groups the basic Read and Write methods.
type ReadWriter interface {
Reader;
@@ -84,6 +95,25 @@
Closer;
}
+// ReadSeeker is the interface that groups the basic Read and Seek methods.
+type ReadSeeker interface {
+ Reader;
+ Seeker;
+}
+
+// WriteSeeker is the interface that groups the basic Write and Seek methods.
+type WriteSeeker interface {
+ Writer;
+ Seeker;
+}
+
+// ReadWriteSeeker is the interface that groups the basic Read, Write and Seek methods.
+type ReadWriteSeeker interface {
+ Reader;
+ Writer;
+ Seeker;
+}
+
// WriteString writes the contents of the string s to w, which accepts an array of bytes.
func WriteString(w Writer, s string) (n int, err os.Error) {
return w.Write(strings.Bytes(s))
