avoid the "src" folder

1 files changed, 21 insertions, 0 deletions

diff --git a/weed/storage/crc.go b/weed/storage/crc.go
new file mode 100644
index 000000000..198352e68
--- /dev/null
+++ b/weed/storage/crc.go
@@ -0,0 +1,21 @@
+package storage
+
+import (
+	"hash/crc32"
+)
+
+var table = crc32.MakeTable(crc32.Castagnoli)
+
+type CRC uint32
+
+func NewCRC(b []byte) CRC {
+	return CRC(0).Update(b)
+}
+
+func (c CRC) Update(b []byte) CRC {
+	return CRC(crc32.Update(uint32(c), table, b))
+}
+
+func (c CRC) Value() uint32 {
+	return uint32(c>>15|c<<17) + 0xa282ead8
+}