diff options
Diffstat (limited to 'gcc-4.8.1/libgo/go/archive/tar/common.go')
| -rw-r--r-- | gcc-4.8.1/libgo/go/archive/tar/common.go | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/gcc-4.8.1/libgo/go/archive/tar/common.go b/gcc-4.8.1/libgo/go/archive/tar/common.go deleted file mode 100644 index 921b9fe9b..000000000 --- a/gcc-4.8.1/libgo/go/archive/tar/common.go +++ /dev/null @@ -1,138 +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 tar implements access to tar archives. -// It aims to cover most of the variations, including those produced -// by GNU and BSD tars. -// -// References: -// http://www.freebsd.org/cgi/man.cgi?query=tar&sektion=5 -// http://www.gnu.org/software/tar/manual/html_node/Standard.html -package tar - -import ( - "errors" - "fmt" - "os" - "time" -) - -const ( - blockSize = 512 - - // Types - TypeReg = '0' // regular file - TypeRegA = '\x00' // regular file - TypeLink = '1' // hard link - TypeSymlink = '2' // symbolic link - TypeChar = '3' // character device node - TypeBlock = '4' // block device node - TypeDir = '5' // directory - TypeFifo = '6' // fifo node - TypeCont = '7' // reserved - TypeXHeader = 'x' // extended header - TypeXGlobalHeader = 'g' // global extended header -) - -// A Header represents a single header in a tar archive. -// Some fields may not be populated. -type Header struct { - Name string // name of header file entry - Mode int64 // permission and mode bits - Uid int // user id of owner - Gid int // group id of owner - Size int64 // length in bytes - ModTime time.Time // modified time - Typeflag byte // type of header entry - Linkname string // target name of link - Uname string // user name of owner - Gname string // group name of owner - Devmajor int64 // major number of character or block device - Devminor int64 // minor number of character or block device - AccessTime time.Time // access time - ChangeTime time.Time // status change time -} - -// sysStat, if non-nil, populates h from system-dependent fields of fi. -var sysStat func(fi os.FileInfo, h *Header) error - -// Mode constants from the tar spec. -const ( - c_ISDIR = 040000 - c_ISFIFO = 010000 - c_ISREG = 0100000 - c_ISLNK = 0120000 - c_ISBLK = 060000 - c_ISCHR = 020000 - c_ISSOCK = 0140000 -) - -// FileInfoHeader creates a partially-populated Header from fi. -// If fi describes a symlink, FileInfoHeader records link as the link target. -func FileInfoHeader(fi os.FileInfo, link string) (*Header, error) { - if fi == nil { - return nil, errors.New("tar: FileInfo is nil") - } - h := &Header{ - Name: fi.Name(), - ModTime: fi.ModTime(), - Mode: int64(fi.Mode().Perm()), // or'd with c_IS* constants later - } - switch { - case fi.Mode()&os.ModeType == 0: - h.Mode |= c_ISREG - h.Typeflag = TypeReg - h.Size = fi.Size() - case fi.IsDir(): - h.Typeflag = TypeDir - h.Mode |= c_ISDIR - case fi.Mode()&os.ModeSymlink != 0: - h.Typeflag = TypeSymlink - h.Mode |= c_ISLNK - h.Linkname = link - case fi.Mode()&os.ModeDevice != 0: - if fi.Mode()&os.ModeCharDevice != 0 { - h.Mode |= c_ISCHR - h.Typeflag = TypeChar - } else { - h.Mode |= c_ISBLK - h.Typeflag = TypeBlock - } - case fi.Mode()&os.ModeSocket != 0: - h.Mode |= c_ISSOCK - default: - return nil, fmt.Errorf("archive/tar: unknown file mode %v", fi.Mode()) - } - if sysStat != nil { - return h, sysStat(fi, h) - } - return h, nil -} - -var zeroBlock = make([]byte, blockSize) - -// POSIX specifies a sum of the unsigned byte values, but the Sun tar uses signed byte values. -// We compute and return both. -func checksum(header []byte) (unsigned int64, signed int64) { - for i := 0; i < len(header); i++ { - if i == 148 { - // The chksum field (header[148:156]) is special: it should be treated as space bytes. - unsigned += ' ' * 8 - signed += ' ' * 8 - i += 7 - continue - } - unsigned += int64(header[i]) - signed += int64(int8(header[i])) - } - return -} - -type slicer []byte - -func (sp *slicer) next(n int) (b []byte) { - s := *sp - b, *sp = s[0:n], s[n:] - return -} |