c脚本怎样把字节数组转换成浮点数

c脚本怎样把字节数组转换成浮点数

/// <summary>
/// 将二进制值转ASCII格式十六进制字符串
/// </summary>
/// <paramname="data">二进制值</param>
/// <paramname="length">定长度的二进制</param>
/// <returns>ASCII格式十六进制字符串</returns>
public static string toHexString(int data, int length)
{
string result = "";
if (data > 0)
result = Convert.ToString(data, 16).ToUpper();
if (result.Length < length)
{
// 位数不够补0
StringBuilder msg = new StringBuilder(0);
msg.Length = 0;
msg.Append(result);
for (; msg.Length < length; msg.Insert(0, "0")) ;
result = msg.ToString();
}
return result;
}
///<summary>
/// 将浮点数转ASCII格式十六进制字符串（符合IEEE-754标准（32））
/// </summary>
/// <paramname="data">浮点数值</param>
/// <returns>十六进制字符串</returns>
public static string FloatToIntString(float data)
{
byte[] intBuffer = BitConverter.GetBytes(data);
StringBuilder stringBuffer = new StringBuilder(0);
for (int i = 0; i < intBuffer.Length; i++)
{
stringBuffer.Insert(0, toHexString(intBuffer[i] & 0xff, 2));
}
return stringBuffer.ToString();
}
/// <summary>
/// 将ASCII格式十六进制字符串转浮点数（符合IEEE-754标准（32））
/// </summary>
/// <param name="data">16进制字符串</param>
/// <returns></returns>
public static float StringToFloat(String data)
{
if (data.Length < 8 || data.Length > 8)
{
//throw new NotEnoughDataInBufferException(data.length(), 8);
return 0;
}
else
{
byte[] intBuffer = new byte[4];
// 将16进制串按字节逆序化（一个字节2个ASCII码）
for (int i = 0; i < 4; i++)
{
intBuffer[i] = Convert.ToByte(data.Substring((3 - i) * 2, 2), 16);
}
return BitConverter.ToSingle(intBuffer, 0);
}
}
/// <summary>
/// 将byte数组转为浮点数
/// </summary>
/// <param name="bResponse">byte数组</param>
/// <returns></returns>
public static float ByteToFloat(byte[] bResponse)
{
if (bResponse.Length < 4 || bResponse.Length > 4)
{
//throw new NotEnoughDataInBufferException(data.length(), 8);
return 0;
}
else
{
byte[] intBuffer = new byte[4];
//将byte数组的前后两个字节的高低位换过来
intBuffer[0] = bResponse[1];
intBuffer[1] = bResponse[0];
intBuffer[2] = bResponse[3];
intBuffer[3] = bResponse[2];
return BitConverter.ToSingle(intBuffer, 0);
}
}
/// <summary>
/// 用指针方式强制将byte数组转为浮点数
/// </summary>
/// <param name="bResponse"></param>
/// <returns></returns>
public static float BytetoFloatByPoint(byte[] bResponse)
{
//uint nRest = ((uint)response[startByte]) * 256 + ((uint)response[startByte + 1]) + 65536 * ((uint)response[startByte + 2]) * 256 + ((uint)response[startByte + 3]);
float fValue = 0f;
uint nRest = ((uint)bResponse[0]) * 256
+ ((uint)bResponse[1]) +
65536 * (((uint)bResponse[2]) * 256 + ((uint)bResponse[3]));
//用指针将整形强制转换成float
unsafe
{
float* ptemp;
ptemp = (float*)(&nRest);
fValue = *ptemp;
}
return fValue;
}

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