1 files changed, 0 insertions, 116 deletions
diff --git a/vendor/github.com/klauspost/compress/zstd/history.go b/vendor/github.com/klauspost/compress/zstd/history.go
deleted file mode 100644
index 09164856d..000000000
--- a/vendor/github.com/klauspost/compress/zstd/history.go
+++ /dev/null
@@ -1,116 +0,0 @@
-// Copyright 2019+ Klaus Post. All rights reserved.
-// License information can be found in the LICENSE file.
-// Based on work by Yann Collet, released under BSD License.
-
-package zstd
-
-import (
-	"github.com/klauspost/compress/huff0"
-)
-
-// history contains the information transferred between blocks.
-type history struct {
-	// Literal decompression
-	huffTree *huff0.Scratch
-
-	// Sequence decompression
-	decoders      sequenceDecs
-	recentOffsets [3]int
-
-	// History buffer...
-	b []byte
-
-	// ignoreBuffer is meant to ignore a number of bytes
-	// when checking for matches in history
-	ignoreBuffer int
-
-	windowSize       int
-	allocFrameBuffer int // needed?
-	error            bool
-	dict             *dict
-}
-
-// reset will reset the history to initial state of a frame.
-// The history must already have been initialized to the desired size.
-func (h *history) reset() {
-	h.b = h.b[:0]
-	h.ignoreBuffer = 0
-	h.error = false
-	h.recentOffsets = [3]int{1, 4, 8}
-	h.decoders.freeDecoders()
-	h.decoders = sequenceDecs{br: h.decoders.br}
-	h.freeHuffDecoder()
-	h.huffTree = nil
-	h.dict = nil
-	//printf("history created: %+v (l: %d, c: %d)", *h, len(h.b), cap(h.b))
-}
-
-func (h *history) freeHuffDecoder() {
-	if h.huffTree != nil {
-		if h.dict == nil || h.dict.litEnc != h.huffTree {
-			huffDecoderPool.Put(h.huffTree)
-			h.huffTree = nil
-		}
-	}
-}
-
-func (h *history) setDict(dict *dict) {
-	if dict == nil {
-		return
-	}
-	h.dict = dict
-	h.decoders.litLengths = dict.llDec
-	h.decoders.offsets = dict.ofDec
-	h.decoders.matchLengths = dict.mlDec
-	h.decoders.dict = dict.content
-	h.recentOffsets = dict.offsets
-	h.huffTree = dict.litEnc
-}
-
-// append bytes to history.
-// This function will make sure there is space for it,
-// if the buffer has been allocated with enough extra space.
-func (h *history) append(b []byte) {
-	if len(b) >= h.windowSize {
-		// Discard all history by simply overwriting
-		h.b = h.b[:h.windowSize]
-		copy(h.b, b[len(b)-h.windowSize:])
-		return
-	}
-
-	// If there is space, append it.
-	if len(b) < cap(h.b)-len(h.b) {
-		h.b = append(h.b, b...)
-		return
-	}
-
-	// Move data down so we only have window size left.
-	// We know we have less than window size in b at this point.
-	discard := len(b) + len(h.b) - h.windowSize
-	copy(h.b, h.b[discard:])
-	h.b = h.b[:h.windowSize]
-	copy(h.b[h.windowSize-len(b):], b)
-}
-
-// ensureBlock will ensure there is space for at least one block...
-func (h *history) ensureBlock() {
-	if cap(h.b) < h.allocFrameBuffer {
-		h.b = make([]byte, 0, h.allocFrameBuffer)
-		return
-	}
-
-	avail := cap(h.b) - len(h.b)
-	if avail >= h.windowSize || avail > maxCompressedBlockSize {
-		return
-	}
-	// Move data down so we only have window size left.
-	// We know we have less than window size in b at this point.
-	discard := len(h.b) - h.windowSize
-	copy(h.b, h.b[discard:])
-	h.b = h.b[:h.windowSize]
-}
-
-// append bytes to history without ever discarding anything.
-func (h *history) appendKeep(b []byte) {
-	h.b = append(h.b, b...)
-}