1 files changed, 0 insertions, 132 deletions
diff --git a/src/pkg/compress/zlib/reader.go b/src/pkg/compress/zlib/reader.go
deleted file mode 100644
index 9e1aafda9..000000000
--- a/src/pkg/compress/zlib/reader.go
+++ /dev/null
@@ -1,132 +0,0 @@
-// 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 zlib implements reading and writing of zlib format compressed data,
-as specified in RFC 1950.
-
-The implementation provides filters that uncompress during reading
-and compress during writing.  For example, to write compressed data
-to a buffer:
-
-	var b bytes.Buffer
-	w := zlib.NewWriter(&b)
-	w.Write([]byte("hello, world\n"))
-	w.Close()
-
-and to read that data back:
-
-	r, err := zlib.NewReader(&b)
-	io.Copy(os.Stdout, r)
-	r.Close()
-*/
-package zlib
-
-import (
-	"bufio"
-	"compress/flate"
-	"errors"
-	"hash"
-	"hash/adler32"
-	"io"
-)
-
-const zlibDeflate = 8
-
-var (
-	// ErrChecksum is returned when reading ZLIB data that has an invalid checksum.
-	ErrChecksum = errors.New("zlib: invalid checksum")
-	// ErrDictionary is returned when reading ZLIB data that has an invalid dictionary.
-	ErrDictionary = errors.New("zlib: invalid dictionary")
-	// ErrHeader is returned when reading ZLIB data that has an invalid header.
-	ErrHeader = errors.New("zlib: invalid header")
-)
-
-type reader struct {
-	r            flate.Reader
-	decompressor io.ReadCloser
-	digest       hash.Hash32
-	err          error
-	scratch      [4]byte
-}
-
-// NewReader creates a new io.ReadCloser.
-// Reads from the returned io.ReadCloser read and decompress data from r.
-// The implementation buffers input and may read more data than necessary from r.
-// It is the caller's responsibility to call Close on the ReadCloser when done.
-func NewReader(r io.Reader) (io.ReadCloser, error) {
-	return NewReaderDict(r, nil)
-}
-
-// NewReaderDict is like NewReader but uses a preset dictionary.
-// NewReaderDict ignores the dictionary if the compressed data does not refer to it.
-func NewReaderDict(r io.Reader, dict []byte) (io.ReadCloser, error) {
-	z := new(reader)
-	if fr, ok := r.(flate.Reader); ok {
-		z.r = fr
-	} else {
-		z.r = bufio.NewReader(r)
-	}
-	_, err := io.ReadFull(z.r, z.scratch[0:2])
-	if err != nil {
-		return nil, err
-	}
-	h := uint(z.scratch[0])<<8 | uint(z.scratch[1])
-	if (z.scratch[0]&0x0f != zlibDeflate) || (h%31 != 0) {
-		return nil, ErrHeader
-	}
-	if z.scratch[1]&0x20 != 0 {
-		_, err = io.ReadFull(z.r, z.scratch[0:4])
-		if err != nil {
-			return nil, err
-		}
-		checksum := uint32(z.scratch[0])<<24 | uint32(z.scratch[1])<<16 | uint32(z.scratch[2])<<8 | uint32(z.scratch[3])
-		if checksum != adler32.Checksum(dict) {
-			return nil, ErrDictionary
-		}
-		z.decompressor = flate.NewReaderDict(z.r, dict)
-	} else {
-		z.decompressor = flate.NewReader(z.r)
-	}
-	z.digest = adler32.New()
-	return z, nil
-}
-
-func (z *reader) Read(p []byte) (n int, err error) {
-	if z.err != nil {
-		return 0, z.err
-	}
-	if len(p) == 0 {
-		return 0, nil
-	}
-
-	n, err = z.decompressor.Read(p)
-	z.digest.Write(p[0:n])
-	if n != 0 || err != io.EOF {
-		z.err = err
-		return
-	}
-
-	// Finished file; check checksum.
-	if _, err := io.ReadFull(z.r, z.scratch[0:4]); err != nil {
-		z.err = err
-		return 0, err
-	}
-	// ZLIB (RFC 1950) is big-endian, unlike GZIP (RFC 1952).
-	checksum := uint32(z.scratch[0])<<24 | uint32(z.scratch[1])<<16 | uint32(z.scratch[2])<<8 | uint32(z.scratch[3])
-	if checksum != z.digest.Sum32() {
-		z.err = ErrChecksum
-		return 0, z.err
-	}
-	return
-}
-
-// Calling Close does not close the wrapped io.Reader originally passed to NewReader.
-func (z *reader) Close() error {
-	if z.err != nil {
-		return z.err
-	}
-	z.err = z.decompressor.Close()
-	return z.err
-}