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author | Wim <wim@42.be> | 2022-06-25 00:36:16 +0200 |
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committer | GitHub <noreply@github.com> | 2022-06-25 00:36:16 +0200 |
commit | 4649876956ab944d2a9ea8fc98c75dc8a9f5ef08 (patch) | |
tree | 0f32da8e492cabd8eca53de319e287e6c4791c5e /vendor/github.com/klauspost/compress/huff0/bitwriter.go | |
parent | 5604d140e3bbf5c8f6c414b1427145a0c4e36bb4 (diff) | |
download | matterbridge-msglm-4649876956ab944d2a9ea8fc98c75dc8a9f5ef08.tar.gz matterbridge-msglm-4649876956ab944d2a9ea8fc98c75dc8a9f5ef08.tar.bz2 matterbridge-msglm-4649876956ab944d2a9ea8fc98c75dc8a9f5ef08.zip |
Update dependencies (#1851)
Diffstat (limited to 'vendor/github.com/klauspost/compress/huff0/bitwriter.go')
-rw-r--r-- | vendor/github.com/klauspost/compress/huff0/bitwriter.go | 115 |
1 files changed, 0 insertions, 115 deletions
diff --git a/vendor/github.com/klauspost/compress/huff0/bitwriter.go b/vendor/github.com/klauspost/compress/huff0/bitwriter.go index 6bce4e87..ec71f7a3 100644 --- a/vendor/github.com/klauspost/compress/huff0/bitwriter.go +++ b/vendor/github.com/klauspost/compress/huff0/bitwriter.go @@ -5,8 +5,6 @@ package huff0 -import "fmt" - // bitWriter will write bits. // First bit will be LSB of the first byte of output. type bitWriter struct { @@ -23,14 +21,6 @@ var bitMask16 = [32]uint16{ 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF, 0xFFFF} /* up to 16 bits */ -// addBits16NC will add up to 16 bits. -// It will not check if there is space for them, -// so the caller must ensure that it has flushed recently. -func (b *bitWriter) addBits16NC(value uint16, bits uint8) { - b.bitContainer |= uint64(value&bitMask16[bits&31]) << (b.nBits & 63) - b.nBits += bits -} - // addBits16Clean will add up to 16 bits. value may not contain more set bits than indicated. // It will not check if there is space for them, so the caller must ensure that it has flushed recently. func (b *bitWriter) addBits16Clean(value uint16, bits uint8) { @@ -70,104 +60,6 @@ func (b *bitWriter) encTwoSymbols(ct cTable, av, bv byte) { b.nBits += encA.nBits + encB.nBits } -// addBits16ZeroNC will add up to 16 bits. -// It will not check if there is space for them, -// so the caller must ensure that it has flushed recently. -// This is fastest if bits can be zero. -func (b *bitWriter) addBits16ZeroNC(value uint16, bits uint8) { - if bits == 0 { - return - } - value <<= (16 - bits) & 15 - value >>= (16 - bits) & 15 - b.bitContainer |= uint64(value) << (b.nBits & 63) - b.nBits += bits -} - -// flush will flush all pending full bytes. -// There will be at least 56 bits available for writing when this has been called. -// Using flush32 is faster, but leaves less space for writing. -func (b *bitWriter) flush() { - v := b.nBits >> 3 - switch v { - case 0: - return - case 1: - b.out = append(b.out, - byte(b.bitContainer), - ) - b.bitContainer >>= 1 << 3 - case 2: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - ) - b.bitContainer >>= 2 << 3 - case 3: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - ) - b.bitContainer >>= 3 << 3 - case 4: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - byte(b.bitContainer>>24), - ) - b.bitContainer >>= 4 << 3 - case 5: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - byte(b.bitContainer>>24), - byte(b.bitContainer>>32), - ) - b.bitContainer >>= 5 << 3 - case 6: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - byte(b.bitContainer>>24), - byte(b.bitContainer>>32), - byte(b.bitContainer>>40), - ) - b.bitContainer >>= 6 << 3 - case 7: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - byte(b.bitContainer>>24), - byte(b.bitContainer>>32), - byte(b.bitContainer>>40), - byte(b.bitContainer>>48), - ) - b.bitContainer >>= 7 << 3 - case 8: - b.out = append(b.out, - byte(b.bitContainer), - byte(b.bitContainer>>8), - byte(b.bitContainer>>16), - byte(b.bitContainer>>24), - byte(b.bitContainer>>32), - byte(b.bitContainer>>40), - byte(b.bitContainer>>48), - byte(b.bitContainer>>56), - ) - b.bitContainer = 0 - b.nBits = 0 - return - default: - panic(fmt.Errorf("bits (%d) > 64", b.nBits)) - } - b.nBits &= 7 -} - // flush32 will flush out, so there are at least 32 bits available for writing. func (b *bitWriter) flush32() { if b.nBits < 32 { @@ -201,10 +93,3 @@ func (b *bitWriter) close() error { b.flushAlign() return nil } - -// reset and continue writing by appending to out. -func (b *bitWriter) reset(out []byte) { - b.bitContainer = 0 - b.nBits = 0 - b.out = out -} |