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TUN-2243: Revert "STOR-519: Add db-connect, a SQL over HTTPS server"
This reverts commit 5da2109811.
This commit is contained in:
Adam Chalmers
179
vendor/github.com/kshvakov/clickhouse/lib/lz4/reader.go
generated
vendored
179
vendor/github.com/kshvakov/clickhouse/lib/lz4/reader.go
generated
vendored
@@ -1,179 +0,0 @@
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/*
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* Copyright 2011-2012 Branimir Karadzic. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY COPYRIGHT HOLDER ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT
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* SHALL COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
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* OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
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* THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package lz4
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import (
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"errors"
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"io"
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)
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var (
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// ErrCorrupt indicates the input was corrupt
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ErrCorrupt = errors.New("corrupt input")
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)
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const (
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mlBits = 4
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mlMask = (1 << mlBits) - 1
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runBits = 8 - mlBits
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runMask = (1 << runBits) - 1
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)
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type decoder struct {
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src []byte
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dst []byte
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spos uint32
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dpos uint32
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ref uint32
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}
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func (d *decoder) readByte() (uint8, error) {
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if int(d.spos) == len(d.src) {
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return 0, io.EOF
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}
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b := d.src[d.spos]
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d.spos++
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return b, nil
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}
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func (d *decoder) getLen() (uint32, error) {
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length := uint32(0)
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ln, err := d.readByte()
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if err != nil {
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return 0, ErrCorrupt
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}
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for ln == 255 {
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length += 255
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ln, err = d.readByte()
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if err != nil {
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return 0, ErrCorrupt
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}
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}
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length += uint32(ln)
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return length, nil
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}
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func (d *decoder) cp(length, decr uint32) {
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if int(d.ref+length) < int(d.dpos) {
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copy(d.dst[d.dpos:], d.dst[d.ref:d.ref+length])
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} else {
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for ii := uint32(0); ii < length; ii++ {
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d.dst[d.dpos+ii] = d.dst[d.ref+ii]
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}
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}
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d.dpos += length
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d.ref += length - decr
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}
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func (d *decoder) finish(err error) error {
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if err == io.EOF {
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return nil
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}
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return err
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}
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// Decode returns the decoded form of src. The returned slice may be a
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// subslice of dst if it was large enough to hold the entire decoded block.
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func Decode(dst, src []byte) (int, error) {
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d := decoder{src: src, dst: dst, spos: 0}
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decr := []uint32{0, 3, 2, 3}
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for {
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code, err := d.readByte()
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if err != nil {
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return len(d.dst), d.finish(err)
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}
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length := uint32(code >> mlBits)
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if length == runMask {
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ln, err := d.getLen()
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if err != nil {
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return 0, ErrCorrupt
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}
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length += ln
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}
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if int(d.spos+length) > len(d.src) || int(d.dpos+length) > len(d.dst) {
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return 0, ErrCorrupt
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}
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for ii := uint32(0); ii < length; ii++ {
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d.dst[d.dpos+ii] = d.src[d.spos+ii]
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}
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d.spos += length
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d.dpos += length
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if int(d.spos) == len(d.src) {
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return len(d.dst), nil
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}
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if int(d.spos+2) >= len(d.src) {
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return 0, ErrCorrupt
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}
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back := uint32(d.src[d.spos]) | uint32(d.src[d.spos+1])<<8
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if back > d.dpos {
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return 0, ErrCorrupt
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}
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d.spos += 2
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d.ref = d.dpos - back
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length = uint32(code & mlMask)
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if length == mlMask {
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ln, err := d.getLen()
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if err != nil {
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return 0, ErrCorrupt
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}
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length += ln
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}
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literal := d.dpos - d.ref
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if literal < 4 {
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if int(d.dpos+4) > len(d.dst) {
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return 0, ErrCorrupt
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}
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d.cp(4, decr[literal])
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} else {
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length += 4
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}
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if int(d.dpos+length) > len(d.dst) {
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return 0, ErrCorrupt
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}
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d.cp(length, 0)
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}
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}
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