diff options
Diffstat (limited to 'src/archive/tar/writer.go')
| -rw-r--r-- | src/archive/tar/writer.go | 89 |
1 files changed, 46 insertions, 43 deletions
diff --git a/src/archive/tar/writer.go b/src/archive/tar/writer.go index e80498d03e..3729f7e82c 100644 --- a/src/archive/tar/writer.go +++ b/src/archive/tar/writer.go @@ -50,7 +50,7 @@ func (tw *Writer) Flush() error { if tw.err != nil { return tw.err } - if nb := tw.curr.LogicalRemaining(); nb > 0 { + if nb := tw.curr.logicalRemaining(); nb > 0 { return fmt.Errorf("archive/tar: missed writing %d bytes", nb) } if _, tw.err = tw.w.Write(zeroBlock[:tw.pad]); tw.err != nil { @@ -117,8 +117,8 @@ func (tw *Writer) writeUSTARHeader(hdr *Header) error { // Pack the main header. var f formatter blk := tw.templateV7Plus(hdr, f.formatString, f.formatOctal) - f.formatString(blk.USTAR().Prefix(), namePrefix) - blk.SetFormat(FormatUSTAR) + f.formatString(blk.toUSTAR().prefix(), namePrefix) + blk.setFormat(FormatUSTAR) if f.err != nil { return f.err // Should never happen since header is validated } @@ -208,7 +208,7 @@ func (tw *Writer) writePAXHeader(hdr *Header, paxHdrs map[string]string) error { var f formatter // Ignore errors since they are expected fmtStr := func(b []byte, s string) { f.formatString(b, toASCII(s)) } blk := tw.templateV7Plus(hdr, fmtStr, f.formatOctal) - blk.SetFormat(FormatPAX) + blk.setFormat(FormatPAX) if err := tw.writeRawHeader(blk, hdr.Size, hdr.Typeflag); err != nil { return err } @@ -250,10 +250,10 @@ func (tw *Writer) writeGNUHeader(hdr *Header) error { var spb []byte blk := tw.templateV7Plus(hdr, f.formatString, f.formatNumeric) if !hdr.AccessTime.IsZero() { - f.formatNumeric(blk.GNU().AccessTime(), hdr.AccessTime.Unix()) + f.formatNumeric(blk.toGNU().accessTime(), hdr.AccessTime.Unix()) } if !hdr.ChangeTime.IsZero() { - f.formatNumeric(blk.GNU().ChangeTime(), hdr.ChangeTime.Unix()) + f.formatNumeric(blk.toGNU().changeTime(), hdr.ChangeTime.Unix()) } // TODO(dsnet): Re-enable this when adding sparse support. // See https://golang.org/issue/22735 @@ -293,7 +293,7 @@ func (tw *Writer) writeGNUHeader(hdr *Header) error { f.formatNumeric(blk.GNU().RealSize(), realSize) } */ - blk.SetFormat(FormatGNU) + blk.setFormat(FormatGNU) if err := tw.writeRawHeader(blk, hdr.Size, hdr.Typeflag); err != nil { return err } @@ -321,28 +321,28 @@ type ( // The block returned is only valid until the next call to // templateV7Plus or writeRawFile. func (tw *Writer) templateV7Plus(hdr *Header, fmtStr stringFormatter, fmtNum numberFormatter) *block { - tw.blk.Reset() + tw.blk.reset() modTime := hdr.ModTime if modTime.IsZero() { modTime = time.Unix(0, 0) } - v7 := tw.blk.V7() - v7.TypeFlag()[0] = hdr.Typeflag - fmtStr(v7.Name(), hdr.Name) - fmtStr(v7.LinkName(), hdr.Linkname) - fmtNum(v7.Mode(), hdr.Mode) - fmtNum(v7.UID(), int64(hdr.Uid)) - fmtNum(v7.GID(), int64(hdr.Gid)) - fmtNum(v7.Size(), hdr.Size) - fmtNum(v7.ModTime(), modTime.Unix()) + v7 := tw.blk.toV7() + v7.typeFlag()[0] = hdr.Typeflag + fmtStr(v7.name(), hdr.Name) + fmtStr(v7.linkName(), hdr.Linkname) + fmtNum(v7.mode(), hdr.Mode) + fmtNum(v7.uid(), int64(hdr.Uid)) + fmtNum(v7.gid(), int64(hdr.Gid)) + fmtNum(v7.size(), hdr.Size) + fmtNum(v7.modTime(), modTime.Unix()) - ustar := tw.blk.USTAR() - fmtStr(ustar.UserName(), hdr.Uname) - fmtStr(ustar.GroupName(), hdr.Gname) - fmtNum(ustar.DevMajor(), hdr.Devmajor) - fmtNum(ustar.DevMinor(), hdr.Devminor) + ustar := tw.blk.toUSTAR() + fmtStr(ustar.userName(), hdr.Uname) + fmtStr(ustar.groupName(), hdr.Gname) + fmtNum(ustar.devMajor(), hdr.Devmajor) + fmtNum(ustar.devMinor(), hdr.Devminor) return &tw.blk } @@ -351,7 +351,7 @@ func (tw *Writer) templateV7Plus(hdr *Header, fmtStr stringFormatter, fmtNum num // It uses format to encode the header format and will write data as the body. // It uses default values for all of the other fields (as BSD and GNU tar does). func (tw *Writer) writeRawFile(name, data string, flag byte, format Format) error { - tw.blk.Reset() + tw.blk.reset() // Best effort for the filename. name = toASCII(name) @@ -361,15 +361,15 @@ func (tw *Writer) writeRawFile(name, data string, flag byte, format Format) erro name = strings.TrimRight(name, "/") var f formatter - v7 := tw.blk.V7() - v7.TypeFlag()[0] = flag - f.formatString(v7.Name(), name) - f.formatOctal(v7.Mode(), 0) - f.formatOctal(v7.UID(), 0) - f.formatOctal(v7.GID(), 0) - f.formatOctal(v7.Size(), int64(len(data))) // Must be < 8GiB - f.formatOctal(v7.ModTime(), 0) - tw.blk.SetFormat(format) + v7 := tw.blk.toV7() + v7.typeFlag()[0] = flag + f.formatString(v7.name(), name) + f.formatOctal(v7.mode(), 0) + f.formatOctal(v7.uid(), 0) + f.formatOctal(v7.gid(), 0) + f.formatOctal(v7.size(), int64(len(data))) // Must be < 8GiB + f.formatOctal(v7.modTime(), 0) + tw.blk.setFormat(format) if f.err != nil { return f.err // Only occurs if size condition is violated } @@ -511,10 +511,13 @@ func (fw *regFileWriter) ReadFrom(r io.Reader) (int64, error) { return io.Copy(struct{ io.Writer }{fw}, r) } -func (fw regFileWriter) LogicalRemaining() int64 { +// logicalRemaining implements fileState.logicalRemaining. +func (fw regFileWriter) logicalRemaining() int64 { return fw.nb } -func (fw regFileWriter) PhysicalRemaining() int64 { + +// logicalRemaining implements fileState.physicalRemaining. +func (fw regFileWriter) physicalRemaining() int64 { return fw.nb } @@ -526,9 +529,9 @@ type sparseFileWriter struct { } func (sw *sparseFileWriter) Write(b []byte) (n int, err error) { - overwrite := int64(len(b)) > sw.LogicalRemaining() + overwrite := int64(len(b)) > sw.logicalRemaining() if overwrite { - b = b[:sw.LogicalRemaining()] + b = b[:sw.logicalRemaining()] } b0 := b @@ -556,7 +559,7 @@ func (sw *sparseFileWriter) Write(b []byte) (n int, err error) { return n, errMissData // Not possible; implies bug in validation logic case err != nil: return n, err - case sw.LogicalRemaining() == 0 && sw.PhysicalRemaining() > 0: + case sw.logicalRemaining() == 0 && sw.physicalRemaining() > 0: return n, errUnrefData // Not possible; implies bug in validation logic case overwrite: return n, ErrWriteTooLong @@ -578,12 +581,12 @@ func (sw *sparseFileWriter) ReadFrom(r io.Reader) (n int64, err error) { var readLastByte bool pos0 := sw.pos - for sw.LogicalRemaining() > 0 && !readLastByte && err == nil { + for sw.logicalRemaining() > 0 && !readLastByte && err == nil { var nf int64 // Size of fragment dataStart, dataEnd := sw.sp[0].Offset, sw.sp[0].endOffset() if sw.pos < dataStart { // In a hole fragment nf = dataStart - sw.pos - if sw.PhysicalRemaining() == 0 { + if sw.physicalRemaining() == 0 { readLastByte = true nf-- } @@ -613,18 +616,18 @@ func (sw *sparseFileWriter) ReadFrom(r io.Reader) (n int64, err error) { return n, errMissData // Not possible; implies bug in validation logic case err != nil: return n, err - case sw.LogicalRemaining() == 0 && sw.PhysicalRemaining() > 0: + case sw.logicalRemaining() == 0 && sw.physicalRemaining() > 0: return n, errUnrefData // Not possible; implies bug in validation logic default: return n, ensureEOF(rs) } } -func (sw sparseFileWriter) LogicalRemaining() int64 { +func (sw sparseFileWriter) logicalRemaining() int64 { return sw.sp[len(sw.sp)-1].endOffset() - sw.pos } -func (sw sparseFileWriter) PhysicalRemaining() int64 { - return sw.fw.PhysicalRemaining() +func (sw sparseFileWriter) physicalRemaining() int64 { + return sw.fw.physicalRemaining() } // zeroWriter may only be written with NULs, otherwise it returns errWriteHole. |