code review 4607052: os.Error API: don't export os.ErrorString, use os.NewEr...

src/pkg/compress/gzip/gunzip.go

 // Copyright 2009 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 gzip implements reading and writing of gzip format compressed files,
 // as specified in RFC 1952.
 package gzip
 
 import (
         "bufio"
@@ skipping 18 matching lines @@
         flagComment = 1 << 4
 )
 
 func makeReader(r io.Reader) flate.Reader {
         if rr, ok := r.(flate.Reader); ok {
                 return rr
         }
         return bufio.NewReader(r)
 }
 
-var HeaderError os.Error = os.ErrorString("invalid gzip header")
-var ChecksumError os.Error = os.ErrorString("gzip checksum error")
+var HeaderError = os.NewError("invalid gzip header")
+var ChecksumError = os.NewError("gzip checksum error")
 
 // The gzip file stores a header giving metadata about the compressed file.
 // That header is exposed as the fields of the Compressor and Decompressor structs.
 type Header struct {
         Comment string // comment
         Extra   []byte // "extra data"
         Mtime   uint32 // modification time (seconds since January 1, 1970)
         Name    string // file name
         OS      byte   // operating system type
 }
@@ skipping 170 matching lines @@
         }
 
         // Yes.  Reset and read from it.
         z.digest.Reset()
         z.size = 0
         return z.Read(p)
 }
 
 // Calling Close does not close the wrapped io.Reader originally passed to NewReader.
 func (z *Decompressor) Close() os.Error { return z.decompressor.Close() }