Update dependencies

vendor/github.com/pierrec/lz4/v4/internal/lz4block/blocks.go

@@ -0,0 +1,87 @@
+// Package lz4block provides LZ4 BlockSize types and pools of buffers.
+package lz4block
+
+import "sync"
+
+const (
+	Block64Kb uint32 = 1 << (16 + iota*2)
+	Block256Kb
+	Block1Mb
+	Block4Mb
+	Block8Mb = 2 * Block4Mb
+)
+
+var (
+	BlockPool64K  = sync.Pool{New: func() interface{} { return make([]byte, Block64Kb) }}
+	BlockPool256K = sync.Pool{New: func() interface{} { return make([]byte, Block256Kb) }}
+	BlockPool1M   = sync.Pool{New: func() interface{} { return make([]byte, Block1Mb) }}
+	BlockPool4M   = sync.Pool{New: func() interface{} { return make([]byte, Block4Mb) }}
+	BlockPool8M   = sync.Pool{New: func() interface{} { return make([]byte, Block8Mb) }}
+)
+
+func Index(b uint32) BlockSizeIndex {
+	switch b {
+	case Block64Kb:
+		return 4
+	case Block256Kb:
+		return 5
+	case Block1Mb:
+		return 6
+	case Block4Mb:
+		return 7
+	case Block8Mb: // only valid in legacy mode
+		return 3
+	}
+	return 0
+}
+
+func IsValid(b uint32) bool {
+	return Index(b) > 0
+}
+
+type BlockSizeIndex uint8
+
+func (b BlockSizeIndex) IsValid() bool {
+	switch b {
+	case 4, 5, 6, 7:
+		return true
+	}
+	return false
+}
+
+func (b BlockSizeIndex) Get() []byte {
+	var buf interface{}
+	switch b {
+	case 4:
+		buf = BlockPool64K.Get()
+	case 5:
+		buf = BlockPool256K.Get()
+	case 6:
+		buf = BlockPool1M.Get()
+	case 7:
+		buf = BlockPool4M.Get()
+	case 3:
+		buf = BlockPool8M.Get()
+	}
+	return buf.([]byte)
+}
+
+func Put(buf []byte) {
+	// Safeguard: do not allow invalid buffers.
+	switch c := cap(buf); uint32(c) {
+	case Block64Kb:
+		BlockPool64K.Put(buf[:c])
+	case Block256Kb:
+		BlockPool256K.Put(buf[:c])
+	case Block1Mb:
+		BlockPool1M.Put(buf[:c])
+	case Block4Mb:
+		BlockPool4M.Put(buf[:c])
+	case Block8Mb:
+		BlockPool8M.Put(buf[:c])
+	}
+}
+
+type CompressionLevel uint32
+
+const Fast CompressionLevel = 0