update

create_crc_data.py

@@ -0,0 +1,51 @@
+#!/usr/bin/python
+# -*- coding: UTF-8 -*-
+
+from zlib import crc32
+import os
+import sys
+import random
+
+
+
+def getCrc32(filename):
+	with open(filename, 'rb') as f:
+		return crc32(f.read())&0xffffffff
+
+def putCrc32(file_path, msg):
+    f=open(file_path,"w")
+    f.write(msg)
+    f.close
+
+# 通过random.randint(a, b)方法得到随机数字
+def generate_random_str(length):
+	random_str=""
+	base_str="ABCDEFGHIGKLMNOPQRSTUVWXYZabcdefghigklmnopqrstuvwxyz0123456789!@#$%^&*()"
+	n=len(base_str)-1
+	for i in range(int(length)):
+	    random_str+=base_str[random.randint(0,n)]  
+	return random_str
+
+if __name__ == '__main__':
+
+    if len(sys.argv) < 2:
+        print ("Usage: python create_crc_data.py <data_length>")
+        exit(-1)
+
+    data_length = sys.argv[1]
+    file_name = str(data_length) +'.dat'
+
+    putCrc32(file_name, generate_random_str(data_length))
+
+
+    checksum=getCrc32(file_name)
+
+    output_file = file_name.replace('.dat','_crc32.dat')
+
+    putCrc32(output_file, hex(checksum))
+
+    print ("Reserve the crc data in %s" % output_file)
+
+    print ("Crc:",(hex(checksum)))
+
+    exit(0)