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Directorty table info parsing.

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Futher work on reading data.
This commit is contained in:
Caleb Gardner
2020-11-13 04:47:54 -06:00
parent f135457443
commit dbf7e9465a
9 changed files with 288 additions and 114 deletions
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compressionoptions.go
+19 -16
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@@ -1,12 +1,14 @@
package squashfs
import (
"compress/zlib"
"compress/gzip"
"io"
"gopkg.in/src-d/go-git.v4/utils/ioutil"
)
const (
zlibCompression = 1 + iota
gzipCompression = 1 + iota
lzmaCompression
lzoCompression
xzCompression
@@ -95,13 +97,13 @@ func NewGzipOptions(raw gzipOptionsRaw) *GzipOptions {
}
func (gzipOp *GzipOptions) Decompress(rdr *io.SectionReader, blockSize int) ([]byte, error) {
zlibRdr, err := zlib.NewReader(rdr)
defer zlibRdr.Close()
gzipRdr, err := gzip.NewReader(rdr)
defer gzipRdr.Close()
if err != nil {
return nil, err
}
bytrw := newByteReadWrite(0)
_, err = io.Copy(bytrw, zlibRdr)
_, err = io.Copy(bytrw, gzipRdr)
if err != nil {
return bytrw.byts, err
}
@@ -109,20 +111,20 @@ func (gzipOp *GzipOptions) Decompress(rdr *io.SectionReader, blockSize int) ([]b
}
func (gzipOp *GzipOptions) DecompressCopy(rdr *io.Reader, wrt *io.Writer) (int, error) {
zlibRdr, err := zlib.NewReader(*rdr)
defer zlibRdr.Close()
gzipRdr, err := gzip.NewReader(*rdr)
defer gzipRdr.Close()
if err != nil {
return 0, err
}
n, err := io.Copy(*wrt, zlibRdr)
n, err := io.Copy(*wrt, gzipRdr)
return int(n), err
}
func (gzipOp *GzipOptions) Compress(rdr *io.SectionReader, blockSize int) ([]byte, error) {
bytWrt := newByteReadWrite(0)
zlibWrt := zlib.NewWriter(bytWrt) //TODO: allow setting level
defer zlibWrt.Close()
_, err := io.Copy(zlibWrt, rdr)
gzipWrt := gzip.NewWriter(bytWrt) //TODO: allow setting level
defer gzipWrt.Close()
_, err := io.Copy(gzipWrt, rdr)
if err != nil {
return bytWrt.byts, err
}
@@ -130,15 +132,16 @@ func (gzipOp *GzipOptions) Compress(rdr *io.SectionReader, blockSize int) ([]byt
}
func (gzipOp *GzipOptions) CompressCopy(rdr *io.Reader, wrt *io.Writer) (int, error) {
zlibWrt := zlib.NewWriter(*wrt) //TODO: allow setting level
defer zlibWrt.Close()
n, err := io.Copy(zlibWrt, *rdr)
gzipWrt := gzip.NewWriter(*wrt) //TODO: allow setting level
defer gzipWrt.Close()
n, err := io.Copy(gzipWrt, *rdr)
return int(n), err
}
func (gzipOp *GzipOptions) Reader(rdr io.Reader) (*io.ReadCloser, error) {
read, err := zlib.NewReader(rdr)
return &read, err
read, err := gzip.NewReader(rdr)
redClo := ioutil.NewReadCloser(read, read)
return &redClo, err
}
type xzOptionsRaw struct {