move to pkg/btrfs, get CRC working

1 files changed, 16 insertions, 0 deletions

diff --git a/pkg/btrfs/crc32c.go b/pkg/btrfs/crc32c.go
new file mode 100644
index 0000000..4ea4169
--- /dev/null
+++ b/pkg/btrfs/crc32c.go
@@ -0,0 +1,16 @@
+package btrfs
+
+import (
+	"encoding/binary"
+	"hash/crc32"
+)
+
+type CSum [0x20]byte
+
+func CRC32c(data []byte) CSum {
+	crc := crc32.Update(0, crc32.MakeTable(crc32.Castagnoli), data)
+
+	var ret CSum
+	binary.LittleEndian.PutUint32(ret[:], crc)
+	return ret
+}