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rebase: update kubernetes to v1.25.0
update kubernetes to latest v1.25.0 release. Signed-off-by: Madhu Rajanna <madhupr007@gmail.com>
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mergify[bot]
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commit
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87
vendor/golang.org/x/net/http2/hpack/huffman.go
generated
vendored
87
vendor/golang.org/x/net/http2/hpack/huffman.go
generated
vendored
@ -169,25 +169,50 @@ func buildRootHuffmanNode() {
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// AppendHuffmanString appends s, as encoded in Huffman codes, to dst
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// and returns the extended buffer.
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func AppendHuffmanString(dst []byte, s string) []byte {
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rembits := uint8(8)
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// This relies on the maximum huffman code length being 30 (See tables.go huffmanCodeLen array)
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// So if a uint64 buffer has less than 32 valid bits can always accommodate another huffmanCode.
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var (
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x uint64 // buffer
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n uint // number valid of bits present in x
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)
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for i := 0; i < len(s); i++ {
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if rembits == 8 {
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dst = append(dst, 0)
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c := s[i]
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n += uint(huffmanCodeLen[c])
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x <<= huffmanCodeLen[c] % 64
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x |= uint64(huffmanCodes[c])
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if n >= 32 {
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n %= 32 // Normally would be -= 32 but %= 32 informs compiler 0 <= n <= 31 for upcoming shift
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y := uint32(x >> n) // Compiler doesn't combine memory writes if y isn't uint32
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dst = append(dst, byte(y>>24), byte(y>>16), byte(y>>8), byte(y))
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}
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dst, rembits = appendByteToHuffmanCode(dst, rembits, s[i])
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}
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if rembits < 8 {
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// special EOS symbol
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code := uint32(0x3fffffff)
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nbits := uint8(30)
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t := uint8(code >> (nbits - rembits))
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dst[len(dst)-1] |= t
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// Add padding bits if necessary
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if over := n % 8; over > 0 {
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const (
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eosCode = 0x3fffffff
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eosNBits = 30
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eosPadByte = eosCode >> (eosNBits - 8)
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)
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pad := 8 - over
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x = (x << pad) | (eosPadByte >> over)
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n += pad // 8 now divides into n exactly
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}
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return dst
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// n in (0, 8, 16, 24, 32)
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switch n / 8 {
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case 0:
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return dst
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case 1:
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return append(dst, byte(x))
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case 2:
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y := uint16(x)
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return append(dst, byte(y>>8), byte(y))
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case 3:
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y := uint16(x >> 8)
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return append(dst, byte(y>>8), byte(y), byte(x))
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}
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// case 4:
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y := uint32(x)
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return append(dst, byte(y>>24), byte(y>>16), byte(y>>8), byte(y))
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}
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// HuffmanEncodeLength returns the number of bytes required to encode
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@ -199,35 +224,3 @@ func HuffmanEncodeLength(s string) uint64 {
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}
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return (n + 7) / 8
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}
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// appendByteToHuffmanCode appends Huffman code for c to dst and
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// returns the extended buffer and the remaining bits in the last
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// element. The appending is not byte aligned and the remaining bits
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// in the last element of dst is given in rembits.
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func appendByteToHuffmanCode(dst []byte, rembits uint8, c byte) ([]byte, uint8) {
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code := huffmanCodes[c]
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nbits := huffmanCodeLen[c]
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for {
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if rembits > nbits {
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t := uint8(code << (rembits - nbits))
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dst[len(dst)-1] |= t
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rembits -= nbits
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break
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}
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t := uint8(code >> (nbits - rembits))
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dst[len(dst)-1] |= t
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nbits -= rembits
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rembits = 8
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if nbits == 0 {
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break
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}
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dst = append(dst, 0)
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}
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return dst, rembits
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}
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