/// <summary>
/// 计算字节数据的crc32值
/// </summary>
/// <param name="data">二进制数据</param>
/// <returns>crc32值</returns>
public static uint CheckSumBytes(byte[] data)
{
CRC32 crc = new CRC32();
crc.Write(data, 0, data.Length);
return(crc.Sum());
}
/// <summary>
/// 检验
/// </summary>
/// <param name="data">字节数据</param>
/// <param name="offset">偏移位置</param>
/// <param name="count">字节数</param>
/// <returns></returns>
public static uint CheckSumSlice(byte[] data, int offset, int count)
{
CRC32 crc = new CRC32();
crc.Write(data, offset, count);
return(crc.Sum());
}
/// <summary>
/// 计算沙盒文件的crc32值
/// </summary>
/// <param name="filePath">沙盒文件全路径</param>
/// <returns>crc32值</returns>
public static uint checkSumFile(string filePath)
{
CRC32 crc = new CRC32();
int bufferLen = 32 * 1024;
using (FileStream fs = new FileStream(filePath, FileMode.Open, FileAccess.Read))
{
byte[] buffer = new byte[bufferLen];
while (true)
{
int n = fs.Read(buffer, 0, bufferLen);
if (n == 0)
{
break;
}
crc.Write(buffer, 0, n);
}
}
return(crc.Sum());
}