1 files changed, 0 insertions, 101 deletions
diff --git a/internal/flatex/window_decoder.go b/internal/flatex/window_decoder.go
deleted file mode 100644
index 492c6a96..00000000
--- a/internal/flatex/window_decoder.go
+++ /dev/null
@@ -1,101 +0,0 @@
-package flatex
-
-// windowDecoder implements the sliding window used in decompression.
-type windowDecoder struct {
-	hist []byte
-
-	wrPos int
-	rdPos int
-	full  bool
-}
-
-func (wd *windowDecoder) init(size int) {
-	*wd = windowDecoder{hist: wd.hist}
-
-	if cap(wd.hist) < size {
-		wd.hist = make([]byte, size)
-	}
-	wd.hist = wd.hist[:size]
-
-	wd.wrPos = 0
-	wd.rdPos = 0
-	wd.full = false
-}
-
-func (wd *windowDecoder) histSize() int {
-	if wd.full {
-		return len(wd.hist)
-	}
-	return wd.wrPos
-}
-
-func (wd *windowDecoder) availRead() int {
-	return wd.wrPos - wd.rdPos
-}
-
-func (wd *windowDecoder) availWrite() int {
-	return len(wd.hist) - wd.wrPos
-}
-
-func (wd *windowDecoder) writeSlice() []byte {
-	return wd.hist[wd.wrPos:]
-}
-
-func (wd *windowDecoder) writeMark(cnt int) {
-	wd.wrPos += cnt
-}
-
-func (wd *windowDecoder) writeByte(c byte) {
-	wd.hist[wd.wrPos] = c
-	wd.wrPos++
-}
-
-func (wd *windowDecoder) writeCopy(dist, length int) int {
-	dstBase := wd.wrPos
-	dstPos := dstBase
-	srcPos := dstPos - dist
-	endPos := dstPos + length
-	if endPos > len(wd.hist) {
-		endPos = len(wd.hist)
-	}
-
-	if srcPos < 0 {
-		srcPos += len(wd.hist)
-		dstPos += copy(wd.hist[dstPos:endPos], wd.hist[srcPos:])
-		srcPos = 0
-	}
-
-	for dstPos < endPos {
-		dstPos += copy(wd.hist[dstPos:endPos], wd.hist[srcPos:dstPos])
-	}
-
-	wd.wrPos = dstPos
-	return dstPos - dstBase
-}
-
-func (wd *windowDecoder) tryWriteCopy(dist, length int) int {
-	dstPos := wd.wrPos
-	endPos := dstPos + length
-	if dstPos < dist || endPos > len(wd.hist) {
-		return 0
-	}
-	dstBase := dstPos
-	srcPos := dstPos - dist
-
-	for dstPos < endPos {
-		dstPos += copy(wd.hist[dstPos:endPos], wd.hist[srcPos:dstPos])
-	}
-
-	wd.wrPos = dstPos
-	return dstPos - dstBase
-}
-
-func (wd *windowDecoder) readFlush() []byte {
-	toRead := wd.hist[wd.rdPos:wd.wrPos]
-	wd.rdPos = wd.wrPos
-	if wd.wrPos == len(wd.hist) {
-		wd.wrPos, wd.rdPos = 0, 0
-		wd.full = true
-	}
-	return toRead
-}