帮忙把这段JAVA程序翻译成C#版本的吧~~~~~~~~
帮忙把这段JAVA程序翻译成C#版本的吧~~~~~~~~public class CRC {
public static short crcRegInit = (short) 0xFFFF;
public static short CCITT16poly = 0x1021;
/**
* Use CCITT16 crc polynormial to generate CRC
*
* @param message
* the byte buffer to be coded
* @param offset
* the starting byte position (inclusively)
* @param length
* the ending byte position (exclusively)
* @return
*/
public static short crc16(byte[] message, int offset, int ending) {
short crcReg = crcRegInit;
for (int i = offset; i < ending; ++i) {
crcReg = singleByteCrc16(crcReg, CCITT16poly, message[i]);
}
return crcReg;
}
public static short singleByteCrc16(short crcReg, short poly, byte data) {
int val = unsignedByte2int(data);//?
int xorFlag;
short dcdBitMask = 0x0080;
for (int i = 0; i < 8; ++i) {
xorFlag = crcReg & 0x8000;
crcReg <<= 1;
if ((val & dcdBitMask) == dcdBitMask)
crcReg |= 1;
if (xorFlag != 0)
crcReg ^= poly;
dcdBitMask >>= 1;
}
return crcReg;
}
/**
* Append CCITT16 crc code to a byte buffer
*
* @param message
* the message to be coded, assume it always has two extra bytes
* from the ending position
* @param offset
* the starting byte position to calculate crc
* @param ending
* the ending byte position (exclusive) to calculate crc
*/
public static void appendCRC16(byte[] message, int offset, int ending) {
short crc = crc16(message, offset, ending);
String crchex = Converters.int2hex(Converters.unsignedShort2int(crc));
byte[] crcbytes = Converters.hex2dec(crchex);
//by Leeric 2012.12.13, bug fix for small crc (1 byte)
if(crcbytes.length != 1) {
message[ending] = crcbytes[0];
message[ending + 1] = crcbytes[1];
}
else {
message[ending] = 0;
message[ending + 1] = crcbytes[0];
}
}
} C# Java --------------------编程问答-------------------- unsignedByte2int这个方法对应的代码您没有贴出来 --------------------编程问答-------------------- google csharp crc16 --------------------编程问答--------------------
额，工程师没有给我也，我问问
补充：.NET技术 , C#
