Prepare to generalize a raczlib.Reader
diff --git a/lib/raczlib/reader.go b/lib/raczlib/reader.go
index 2a99272..53a6a5e 100644
--- a/lib/raczlib/reader.go
+++ b/lib/raczlib/reader.go
@@ -106,7 +106,7 @@
// Calling Seek may reset the state machine to "State A".
//
// The initial state is "State A".
- zlibReader io.ReadCloser
+ zlibReader io.Reader
inImplicitZeroes bool
// buf is a scratch buffer.
@@ -249,12 +249,14 @@
}
func (r *Reader) transitionFromStateBToStateC() error {
- if err := r.zlibReader.Close(); err != nil {
- if err == io.EOF {
- err = io.ErrUnexpectedEOF
+ if c, ok := r.zlibReader.(io.Closer); ok {
+ if err := c.Close(); err != nil {
+ if err == io.EOF {
+ err = io.ErrUnexpectedEOF
+ }
+ r.err = err
+ return r.err
}
- r.err = err
- return r.err
}
r.zlibReader = nil
r.inImplicitZeroes = true
