[VOL-5486] Fix deprecated versions
Change-Id: I3e03ea246020547ae75fa92ce8cf5cbba7e8f3bb
Signed-off-by: Abhay Kumar <abhay.kumar@radisys.com>
diff --git a/vendor/github.com/klauspost/compress/gzip/gunzip.go b/vendor/github.com/klauspost/compress/gzip/gunzip.go
new file mode 100644
index 0000000..00a0a2c
--- /dev/null
+++ b/vendor/github.com/klauspost/compress/gzip/gunzip.go
@@ -0,0 +1,380 @@
+// 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"
+ "compress/gzip"
+ "encoding/binary"
+ "hash/crc32"
+ "io"
+ "time"
+
+ "github.com/klauspost/compress/flate"
+)
+
+const (
+ gzipID1 = 0x1f
+ gzipID2 = 0x8b
+ gzipDeflate = 8
+ flagText = 1 << 0
+ flagHdrCrc = 1 << 1
+ flagExtra = 1 << 2
+ flagName = 1 << 3
+ flagComment = 1 << 4
+)
+
+var (
+ // ErrChecksum is returned when reading GZIP data that has an invalid checksum.
+ ErrChecksum = gzip.ErrChecksum
+ // ErrHeader is returned when reading GZIP data that has an invalid header.
+ ErrHeader = gzip.ErrHeader
+)
+
+var le = binary.LittleEndian
+
+// noEOF converts io.EOF to io.ErrUnexpectedEOF.
+func noEOF(err error) error {
+ if err == io.EOF {
+ return io.ErrUnexpectedEOF
+ }
+ return err
+}
+
+// The gzip file stores a header giving metadata about the compressed file.
+// That header is exposed as the fields of the Writer and Reader structs.
+//
+// Strings must be UTF-8 encoded and may only contain Unicode code points
+// U+0001 through U+00FF, due to limitations of the GZIP file format.
+type Header struct {
+ Comment string // comment
+ Extra []byte // "extra data"
+ ModTime time.Time // modification time
+ Name string // file name
+ OS byte // operating system type
+}
+
+// A Reader is an io.Reader that can be read to retrieve
+// uncompressed data from a gzip-format compressed file.
+//
+// In general, a gzip file can be a concatenation of gzip files,
+// each with its own header. Reads from the Reader
+// return the concatenation of the uncompressed data of each.
+// Only the first header is recorded in the Reader fields.
+//
+// Gzip files store a length and checksum of the uncompressed data.
+// The Reader will return a ErrChecksum when Read
+// reaches the end of the uncompressed data if it does not
+// have the expected length or checksum. Clients should treat data
+// returned by Read as tentative until they receive the io.EOF
+// marking the end of the data.
+type Reader struct {
+ Header // valid after NewReader or Reader.Reset
+ r flate.Reader
+ br *bufio.Reader
+ decompressor io.ReadCloser
+ digest uint32 // CRC-32, IEEE polynomial (section 8)
+ size uint32 // Uncompressed size (section 2.3.1)
+ buf [512]byte
+ err error
+ multistream bool
+}
+
+// NewReader creates a new Reader reading the given reader.
+// If r does not also implement io.ByteReader,
+// the decompressor may read more data than necessary from r.
+//
+// It is the caller's responsibility to call Close on the Reader when done.
+//
+// The Reader.Header fields will be valid in the Reader returned.
+func NewReader(r io.Reader) (*Reader, error) {
+ z := new(Reader)
+ if err := z.Reset(r); err != nil {
+ return nil, err
+ }
+ return z, nil
+}
+
+// Reset discards the Reader z's state and makes it equivalent to the
+// result of its original state from NewReader, but reading from r instead.
+// This permits reusing a Reader rather than allocating a new one.
+func (z *Reader) Reset(r io.Reader) error {
+ *z = Reader{
+ decompressor: z.decompressor,
+ multistream: true,
+ br: z.br,
+ }
+ if rr, ok := r.(flate.Reader); ok {
+ z.r = rr
+ } else {
+ // Reuse if we can.
+ if z.br != nil {
+ z.br.Reset(r)
+ } else {
+ z.br = bufio.NewReader(r)
+ }
+ z.r = z.br
+ }
+ z.Header, z.err = z.readHeader()
+ return z.err
+}
+
+// Multistream controls whether the reader supports multistream files.
+//
+// If enabled (the default), the Reader expects the input to be a sequence
+// of individually gzipped data streams, each with its own header and
+// trailer, ending at EOF. The effect is that the concatenation of a sequence
+// of gzipped files is treated as equivalent to the gzip of the concatenation
+// of the sequence. This is standard behavior for gzip readers.
+//
+// Calling Multistream(false) disables this behavior; disabling the behavior
+// can be useful when reading file formats that distinguish individual gzip
+// data streams or mix gzip data streams with other data streams.
+// In this mode, when the Reader reaches the end of the data stream,
+// Read returns io.EOF. If the underlying reader implements io.ByteReader,
+// it will be left positioned just after the gzip stream.
+// To start the next stream, call z.Reset(r) followed by z.Multistream(false).
+// If there is no next stream, z.Reset(r) will return io.EOF.
+func (z *Reader) Multistream(ok bool) {
+ z.multistream = ok
+}
+
+// readString reads a NUL-terminated string from z.r.
+// It treats the bytes read as being encoded as ISO 8859-1 (Latin-1) and
+// will output a string encoded using UTF-8.
+// This method always updates z.digest with the data read.
+func (z *Reader) readString() (string, error) {
+ var err error
+ needConv := false
+ for i := 0; ; i++ {
+ if i >= len(z.buf) {
+ return "", ErrHeader
+ }
+ z.buf[i], err = z.r.ReadByte()
+ if err != nil {
+ return "", err
+ }
+ if z.buf[i] > 0x7f {
+ needConv = true
+ }
+ if z.buf[i] == 0 {
+ // Digest covers the NUL terminator.
+ z.digest = crc32.Update(z.digest, crc32.IEEETable, z.buf[:i+1])
+
+ // Strings are ISO 8859-1, Latin-1 (RFC 1952, section 2.3.1).
+ if needConv {
+ s := make([]rune, 0, i)
+ for _, v := range z.buf[:i] {
+ s = append(s, rune(v))
+ }
+ return string(s), nil
+ }
+ return string(z.buf[:i]), nil
+ }
+ }
+}
+
+// readHeader reads the GZIP header according to section 2.3.1.
+// This method does not set z.err.
+func (z *Reader) readHeader() (hdr Header, err error) {
+ if _, err = io.ReadFull(z.r, z.buf[:10]); err != nil {
+ // RFC 1952, section 2.2, says the following:
+ // A gzip file consists of a series of "members" (compressed data sets).
+ //
+ // Other than this, the specification does not clarify whether a
+ // "series" is defined as "one or more" or "zero or more". To err on the
+ // side of caution, Go interprets this to mean "zero or more".
+ // Thus, it is okay to return io.EOF here.
+ return hdr, err
+ }
+ if z.buf[0] != gzipID1 || z.buf[1] != gzipID2 || z.buf[2] != gzipDeflate {
+ return hdr, ErrHeader
+ }
+ flg := z.buf[3]
+ hdr.ModTime = time.Unix(int64(le.Uint32(z.buf[4:8])), 0)
+ // z.buf[8] is XFL and is currently ignored.
+ hdr.OS = z.buf[9]
+ z.digest = crc32.ChecksumIEEE(z.buf[:10])
+
+ if flg&flagExtra != 0 {
+ if _, err = io.ReadFull(z.r, z.buf[:2]); err != nil {
+ return hdr, noEOF(err)
+ }
+ z.digest = crc32.Update(z.digest, crc32.IEEETable, z.buf[:2])
+ data := make([]byte, le.Uint16(z.buf[:2]))
+ if _, err = io.ReadFull(z.r, data); err != nil {
+ return hdr, noEOF(err)
+ }
+ z.digest = crc32.Update(z.digest, crc32.IEEETable, data)
+ hdr.Extra = data
+ }
+
+ var s string
+ if flg&flagName != 0 {
+ if s, err = z.readString(); err != nil {
+ return hdr, err
+ }
+ hdr.Name = s
+ }
+
+ if flg&flagComment != 0 {
+ if s, err = z.readString(); err != nil {
+ return hdr, err
+ }
+ hdr.Comment = s
+ }
+
+ if flg&flagHdrCrc != 0 {
+ if _, err = io.ReadFull(z.r, z.buf[:2]); err != nil {
+ return hdr, noEOF(err)
+ }
+ digest := le.Uint16(z.buf[:2])
+ if digest != uint16(z.digest) {
+ return hdr, ErrHeader
+ }
+ }
+
+ // Reserved FLG bits must be zero.
+ if flg>>5 != 0 {
+ return hdr, ErrHeader
+ }
+
+ z.digest = 0
+ if z.decompressor == nil {
+ z.decompressor = flate.NewReader(z.r)
+ } else {
+ z.decompressor.(flate.Resetter).Reset(z.r, nil)
+ }
+ return hdr, nil
+}
+
+// Read implements io.Reader, reading uncompressed bytes from its underlying Reader.
+func (z *Reader) Read(p []byte) (n int, err error) {
+ if z.err != nil {
+ return 0, z.err
+ }
+
+ for n == 0 {
+ n, z.err = z.decompressor.Read(p)
+ z.digest = crc32.Update(z.digest, crc32.IEEETable, p[:n])
+ z.size += uint32(n)
+ if z.err != io.EOF {
+ // In the normal case we return here.
+ return n, z.err
+ }
+
+ // Finished file; check checksum and size.
+ if _, err := io.ReadFull(z.r, z.buf[:8]); err != nil {
+ z.err = noEOF(err)
+ return n, z.err
+ }
+ digest := le.Uint32(z.buf[:4])
+ size := le.Uint32(z.buf[4:8])
+ if digest != z.digest || size != z.size {
+ z.err = ErrChecksum
+ return n, z.err
+ }
+ z.digest, z.size = 0, 0
+
+ // File is ok; check if there is another.
+ if !z.multistream {
+ return n, io.EOF
+ }
+ z.err = nil // Remove io.EOF
+
+ if _, z.err = z.readHeader(); z.err != nil {
+ return n, z.err
+ }
+ }
+
+ return n, nil
+}
+
+type crcer interface {
+ io.Writer
+ Sum32() uint32
+ Reset()
+}
+type crcUpdater struct {
+ z *Reader
+}
+
+func (c *crcUpdater) Write(p []byte) (int, error) {
+ c.z.digest = crc32.Update(c.z.digest, crc32.IEEETable, p)
+ return len(p), nil
+}
+
+func (c *crcUpdater) Sum32() uint32 {
+ return c.z.digest
+}
+
+func (c *crcUpdater) Reset() {
+ c.z.digest = 0
+}
+
+// WriteTo support the io.WriteTo interface for io.Copy and friends.
+func (z *Reader) WriteTo(w io.Writer) (int64, error) {
+ total := int64(0)
+ crcWriter := crcer(crc32.NewIEEE())
+ if z.digest != 0 {
+ crcWriter = &crcUpdater{z: z}
+ }
+ for {
+ if z.err != nil {
+ if z.err == io.EOF {
+ return total, nil
+ }
+ return total, z.err
+ }
+
+ // We write both to output and digest.
+ mw := io.MultiWriter(w, crcWriter)
+ n, err := z.decompressor.(io.WriterTo).WriteTo(mw)
+ total += n
+ z.size += uint32(n)
+ if err != nil {
+ z.err = err
+ return total, z.err
+ }
+
+ // Finished file; check checksum + size.
+ if _, err := io.ReadFull(z.r, z.buf[0:8]); err != nil {
+ if err == io.EOF {
+ err = io.ErrUnexpectedEOF
+ }
+ z.err = err
+ return total, err
+ }
+ z.digest = crcWriter.Sum32()
+ digest := le.Uint32(z.buf[:4])
+ size := le.Uint32(z.buf[4:8])
+ if digest != z.digest || size != z.size {
+ z.err = ErrChecksum
+ return total, z.err
+ }
+ z.digest, z.size = 0, 0
+
+ // File is ok; check if there is another.
+ if !z.multistream {
+ return total, nil
+ }
+ crcWriter.Reset()
+ z.err = nil // Remove io.EOF
+
+ if _, z.err = z.readHeader(); z.err != nil {
+ if z.err == io.EOF {
+ return total, nil
+ }
+ return total, z.err
+ }
+ }
+}
+
+// Close closes the Reader. It does not close the underlying io.Reader.
+// In order for the GZIP checksum to be verified, the reader must be
+// fully consumed until the io.EOF.
+func (z *Reader) Close() error { return z.decompressor.Close() }