Caleb Gardner
81 lines
1.6 KiB
Go
81 lines
1.6 KiB
Go
package squashfs
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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 uint64
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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) checkMagic() bool {
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return s.Magic == 0x73717368
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}
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func (s superblock) checkBlockLog() 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) checkVersion() 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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