Caleb Gardner
81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package squashfslow
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import "math"
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type superblock struct {
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Magic uint32
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InodeCount uint32
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ModTime uint32
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BlockSize uint32
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FragCount uint32
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CompType uint16
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BlockLog uint16
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Flags uint16
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IdCount uint16
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VerMaj uint16
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VerMin uint16
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RootInodeRef InodeRef
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Size uint64
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IdTableStart uint64
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XattrTableStart uint64
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InodeTableStart uint64
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DirTableStart uint64
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FragTableStart uint64
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ExportTableStart uint64
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}
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func (s superblock) ValidMagic() bool {
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return s.Magic == 0x73717368
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}
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func (s superblock) ValidBlockLog() bool {
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return s.BlockLog == uint16(math.Log2(float64(s.BlockSize)))
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}
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func (s superblock) ValidVersion() bool {
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return s.VerMaj == 4 && s.VerMin == 0
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}
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func (s superblock) UncompressedInodes() bool {
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return s.Flags&0x1 == 0x1
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}
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func (s superblock) UncompressedData() bool {
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return s.Flags&0x2 == 0x2
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}
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func (s superblock) UncompressedFragments() bool {
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return s.Flags&0x8 == 0x8
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}
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func (s superblock) NoFragments() bool {
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return s.Flags&0x10 == 0x10
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}
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func (s superblock) AlwaysFragment() bool {
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return s.Flags&0x20 == 0x20
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}
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func (s superblock) Duplicates() bool {
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return s.Flags&0x40 == 0x40
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}
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func (s superblock) Exportable() bool {
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return s.Flags&0x80 == 0x80
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}
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func (s superblock) UncompressedXattrs() bool {
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return s.Flags&0x100 == 0x100
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}
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func (s superblock) NoXattrs() bool {
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return s.Flags&0x200 == 0x200
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}
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func (s superblock) CompressionOptions() bool {
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return s.Flags&0x400 == 0x400
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}
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func (s superblock) UncompressedIDs() bool {
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return s.Flags&0x800 == 0x800
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}
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