Remove donut_gen binary and update crc32c function

pkg/storage/donut/v1/donut.go

@@ -119,10 +119,8 @@ func (donut *Donut) WriteEnd(target io.Writer, donutFormat DonutFormat) error {
 	if err := binary.Write(&tempBuffer, binary.LittleEndian, donutFormat.BlockEnd); err != nil {
 		return err
 	}
-	crc, err := crc32c.Crc32c(tempBuffer.Bytes())
-	if err != nil {
-		return err
-	}
+
+	crc := crc32c.Sum32(tempBuffer.Bytes())
 	if err := binary.Write(target, binary.LittleEndian, crc); err != nil {
 		return err
 	}
@@ -169,10 +167,7 @@ func (donut *Donut) WriteBegin(target io.Writer, donutFormat DonutFormat) error
 	if err := binary.Write(&headerBytes, binary.LittleEndian, donutFormat.GobHeader); err != nil {
 		return err
 	}
-	crc, err := crc32c.Crc32c(headerBytes.Bytes())
-	if err != nil {
-		return err
-	}
+	crc := crc32c.Sum32(headerBytes.Bytes())
 	if err := binary.Write(&headerBytes, binary.LittleEndian, crc); err != nil {
 		return err
 	}

pkg/storage/donut/v1/donut_gen_v1/.gitignore

@@ -0,0 +1,2 @@
+donut_gen
+hello

pkg/storage/donut/v1/donut_gen_v1/donut_gen.go

@@ -12,7 +12,7 @@ import (
 func main() {
 	fmt.Println("--start")
 
-	file, err := os.OpenFile("newfile", os.O_WRONLY|os.O_CREATE, 0666)
+	file, err := os.OpenFile("hello", os.O_WRONLY|os.O_CREATE, 0666)
 	if err != nil {
 		panic(err)
 	}
@@ -30,10 +30,10 @@ func main() {
 	fmt.Println("--closed")
 
 	fmt.Println("--verify")
-	stat, _ := os.Stat("newfile")
+	stat, _ := os.Stat("hello")
 	fileSize := stat.Size()
 
-	rfile, _ := os.OpenFile("newfile", os.O_RDONLY, 0666)
+	rfile, _ := os.OpenFile("hello", os.O_RDONLY, 0666)
 	blockStart := make([]byte, 4)
 	blockStartCheck := []byte{'M', 'I', 'N', 'I'}