add cgo label

Signed-off-by: chennqqi <[email protected]>

Author: chennqqi

c/md5.go

@@ -1,46 +1,15 @@
 package c
 
-// #cgo CFLAGS: -I .
-
-/*
-#include "md5.h"
-#include <stdlib.h>
-*/
-import "C"
-
 import (
 	"crypto/md5"
 	"encoding/hex"
 	"errors"
 	"io"
 	"os"
-	"unsafe"
 )
 
 var ErrOpenFileError = errors.New("Open File Error")
 
-func MD5FileByC(filename string) (string, error) {
-	pName := C.CString(filename)
-	defer C.free(unsafe.Pointer(pName))
-	var md5bytes [16]byte
-	r := C.MD5File(pName, (*C.uchar)(&md5bytes[0]))
-	if int(r) != 0 {
-		return "", ErrOpenFileError
-	}
-	return hex.EncodeToString(md5bytes[:]), nil
-}
-
-func MD5FileByCEx(filename string) (string, int64, error) {
-	pName := C.CString(filename)
-	defer C.free(unsafe.Pointer(pName))
-	var md5bytes [16]byte
-	r := C.MD5FileExt(pName, (*C.uchar)(&md5bytes[0]))
-	if int(r) < 0 {
-		return "", 0, ErrOpenFileError
-	}
-	return hex.EncodeToString(md5bytes[:]), int64(r), nil
-}
-
 func MD5FileByGo(filename string) (string, error) {
 	f, err := os.Open(filename)
 	if err != nil {