Java version:public static long crc32(byte[] data) {
CRC32 crc32 = new CRC32();
crc32.update(data);
return crc32.getValue();
}How to implement it simplely in C#/.NET?
2 回答
Helenr
TA貢獻1780條經驗 獲得超4個贊
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
namespace wcs_csharp_sdk.main.util
{
public class CRC32
{
static protected ulong[] Crc32Table;
//生成CRC32碼表
static public void GetCRC32Table()
{
ulong Crc;
Crc32Table = new ulong[256];
int i, j;
for (i = 0; i < 256; i++)
{
Crc = (ulong)i;
for (j = 8; j > 0; j--)
{
if ((Crc & 1) == 1)
Crc = (Crc >> 1) ^ 0xEDB88320;
else
Crc >>= 1;
}
Crc32Table[i] = Crc;
}
}
//獲取byte[]的CRC32校驗值
static public ulong GetCRC32(byte[] buffer)
{
//生成碼表
GetCRC32Table();
ulong value = 0xffffffff;
int len = buffer.Length;
for (int i = 0; i < len; i++)
{
value = (value >> 8) ^ Crc32Table[(value & 0xFF) ^ buffer[i]];
}
return value ^ 0xffffffff;
}
//獲取字符串的CRC32校驗值
static public ulong GetCRC32(string sInputString)
{
//生成碼表
GetCRC32Table();
byte[] buffer = System.Text.ASCIIEncoding.ASCII.GetBytes(sInputString);
ulong value = 0xffffffff;
int len = buffer.Length;
for (int i = 0; i < len; i++)
{
value = (value >> 8) ^ Crc32Table[(value & 0xFF) ^ buffer[i]];
}
return value ^ 0xffffffff;
}
}
}
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