diff options
Diffstat (limited to 'src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/golang.org/x/crypto/openpgp/packet/compressed.go')
-rw-r--r-- | src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/golang.org/x/crypto/openpgp/packet/compressed.go | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/golang.org/x/crypto/openpgp/packet/compressed.go b/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/golang.org/x/crypto/openpgp/packet/compressed.go deleted file mode 100644 index e8f0b5caa7d..00000000000 --- a/src/mongo/gotools/src/github.com/mongodb/mongo-tools/vendor/golang.org/x/crypto/openpgp/packet/compressed.go +++ /dev/null @@ -1,123 +0,0 @@ -// Copyright 2011 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 packet - -import ( - "compress/bzip2" - "compress/flate" - "compress/zlib" - "golang.org/x/crypto/openpgp/errors" - "io" - "strconv" -) - -// Compressed represents a compressed OpenPGP packet. The decompressed contents -// will contain more OpenPGP packets. See RFC 4880, section 5.6. -type Compressed struct { - Body io.Reader -} - -const ( - NoCompression = flate.NoCompression - BestSpeed = flate.BestSpeed - BestCompression = flate.BestCompression - DefaultCompression = flate.DefaultCompression -) - -// CompressionConfig contains compressor configuration settings. -type CompressionConfig struct { - // Level is the compression level to use. It must be set to - // between -1 and 9, with -1 causing the compressor to use the - // default compression level, 0 causing the compressor to use - // no compression and 1 to 9 representing increasing (better, - // slower) compression levels. If Level is less than -1 or - // more then 9, a non-nil error will be returned during - // encryption. See the constants above for convenient common - // settings for Level. - Level int -} - -func (c *Compressed) parse(r io.Reader) error { - var buf [1]byte - _, err := readFull(r, buf[:]) - if err != nil { - return err - } - - switch buf[0] { - case 1: - c.Body = flate.NewReader(r) - case 2: - c.Body, err = zlib.NewReader(r) - case 3: - c.Body = bzip2.NewReader(r) - default: - err = errors.UnsupportedError("unknown compression algorithm: " + strconv.Itoa(int(buf[0]))) - } - - return err -} - -// compressedWriterCloser represents the serialized compression stream -// header and the compressor. Its Close() method ensures that both the -// compressor and serialized stream header are closed. Its Write() -// method writes to the compressor. -type compressedWriteCloser struct { - sh io.Closer // Stream Header - c io.WriteCloser // Compressor -} - -func (cwc compressedWriteCloser) Write(p []byte) (int, error) { - return cwc.c.Write(p) -} - -func (cwc compressedWriteCloser) Close() (err error) { - err = cwc.c.Close() - if err != nil { - return err - } - - return cwc.sh.Close() -} - -// SerializeCompressed serializes a compressed data packet to w and -// returns a WriteCloser to which the literal data packets themselves -// can be written and which MUST be closed on completion. If cc is -// nil, sensible defaults will be used to configure the compression -// algorithm. -func SerializeCompressed(w io.WriteCloser, algo CompressionAlgo, cc *CompressionConfig) (literaldata io.WriteCloser, err error) { - compressed, err := serializeStreamHeader(w, packetTypeCompressed) - if err != nil { - return - } - - _, err = compressed.Write([]byte{uint8(algo)}) - if err != nil { - return - } - - level := DefaultCompression - if cc != nil { - level = cc.Level - } - - var compressor io.WriteCloser - switch algo { - case CompressionZIP: - compressor, err = flate.NewWriter(compressed, level) - case CompressionZLIB: - compressor, err = zlib.NewWriterLevel(compressed, level) - default: - s := strconv.Itoa(int(algo)) - err = errors.UnsupportedError("Unsupported compression algorithm: " + s) - } - if err != nil { - return - } - - literaldata = compressedWriteCloser{compressed, compressor} - - return -} |