mirror of
https://github.com/containers/skopeo.git
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Update vendor containers/(common,image)
Signed-off-by: Daniel J Walsh <dwalsh@redhat.com>
This commit is contained in:
59
vendor/github.com/klauspost/compress/flate/fast_encoder.go
generated
vendored
59
vendor/github.com/klauspost/compress/flate/fast_encoder.go
generated
vendored
@@ -58,17 +58,6 @@ const (
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prime8bytes = 0xcf1bbcdcb7a56463
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)
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func load32(b []byte, i int) uint32 {
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// Help the compiler eliminate bounds checks on the read so it can be done in a single read.
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b = b[i:]
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b = b[:4]
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return uint32(b[0]) | uint32(b[1])<<8 | uint32(b[2])<<16 | uint32(b[3])<<24
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}
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func load64(b []byte, i int) uint64 {
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return binary.LittleEndian.Uint64(b[i:])
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}
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func load3232(b []byte, i int32) uint32 {
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return binary.LittleEndian.Uint32(b[i:])
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}
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@@ -77,10 +66,6 @@ func load6432(b []byte, i int32) uint64 {
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return binary.LittleEndian.Uint64(b[i:])
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}
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func hash(u uint32) uint32 {
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return (u * 0x1e35a7bd) >> tableShift
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}
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type tableEntry struct {
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offset int32
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}
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@@ -104,7 +89,8 @@ func (e *fastGen) addBlock(src []byte) int32 {
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}
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// Move down
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offset := int32(len(e.hist)) - maxMatchOffset
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copy(e.hist[0:maxMatchOffset], e.hist[offset:])
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// copy(e.hist[0:maxMatchOffset], e.hist[offset:])
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*(*[maxMatchOffset]byte)(e.hist) = *(*[maxMatchOffset]byte)(e.hist[offset:])
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e.cur += offset
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e.hist = e.hist[:maxMatchOffset]
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}
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@@ -114,39 +100,36 @@ func (e *fastGen) addBlock(src []byte) int32 {
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return s
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}
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// hash4 returns the hash of u to fit in a hash table with h bits.
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// Preferably h should be a constant and should always be <32.
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func hash4u(u uint32, h uint8) uint32 {
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return (u * prime4bytes) >> (32 - h)
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}
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type tableEntryPrev struct {
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Cur tableEntry
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Prev tableEntry
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}
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// hash4x64 returns the hash of the lowest 4 bytes of u to fit in a hash table with h bits.
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// Preferably h should be a constant and should always be <32.
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func hash4x64(u uint64, h uint8) uint32 {
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return (uint32(u) * prime4bytes) >> ((32 - h) & reg8SizeMask32)
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}
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// hash7 returns the hash of the lowest 7 bytes of u to fit in a hash table with h bits.
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// Preferably h should be a constant and should always be <64.
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func hash7(u uint64, h uint8) uint32 {
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return uint32(((u << (64 - 56)) * prime7bytes) >> ((64 - h) & reg8SizeMask64))
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}
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// hash8 returns the hash of u to fit in a hash table with h bits.
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// Preferably h should be a constant and should always be <64.
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func hash8(u uint64, h uint8) uint32 {
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return uint32((u * prime8bytes) >> ((64 - h) & reg8SizeMask64))
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}
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// hash6 returns the hash of the lowest 6 bytes of u to fit in a hash table with h bits.
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// Preferably h should be a constant and should always be <64.
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func hash6(u uint64, h uint8) uint32 {
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return uint32(((u << (64 - 48)) * prime6bytes) >> ((64 - h) & reg8SizeMask64))
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// hashLen returns a hash of the lowest mls bytes of with length output bits.
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// mls must be >=3 and <=8. Any other value will return hash for 4 bytes.
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// length should always be < 32.
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// Preferably length and mls should be a constant for inlining.
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func hashLen(u uint64, length, mls uint8) uint32 {
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switch mls {
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case 3:
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return (uint32(u<<8) * prime3bytes) >> (32 - length)
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case 5:
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return uint32(((u << (64 - 40)) * prime5bytes) >> (64 - length))
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case 6:
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return uint32(((u << (64 - 48)) * prime6bytes) >> (64 - length))
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case 7:
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return uint32(((u << (64 - 56)) * prime7bytes) >> (64 - length))
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case 8:
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return uint32((u * prime8bytes) >> (64 - length))
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default:
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return (uint32(u) * prime4bytes) >> (32 - length)
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}
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}
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// matchlen will return the match length between offsets and t in src.
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