代码:
BitConverter.GetBytes(ts.uTest);
BitConverter.GetBytes(ts.dTest);
BitConverter.GetBytes(ts.uTest);
生成的exe后,反编译:
public static unsafe byte[] GetBytes(double value)
{
return GetBytes(*((long*) &value));
}
public static unsafe byte[] GetBytes(long value)
{
byte[] buffer = new byte[8];
fixed (byte* numRef = buffer)
{
*((long*) numRef) = value;
}
return buffer;
}
public static unsafe double ToDouble(byte[] value, int startIndex)
{
return *(((double*) &ToInt64(value, startIndex)));
}
public static unsafe short ToInt16(byte[] value, int startIndex)
{
if (value == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
}
if (((ulong) startIndex) >= value.Length)
{
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
}
if (startIndex > (value.Length - 2))
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
}
fixed (byte* numRef = &(value[startIndex]))
{
if ((startIndex % 2) == 0)
{
return *(((short*) numRef));
}
if (IsLittleEndian)
{
return (short) (numRef[0] | (numRef[1] << 8));
}
return (short) ((numRef[0] << 8) | numRef[1]);
}
}
BitConverter.GetBytes(ts.uTest);
BitConverter.GetBytes(ts.dTest);
BitConverter.GetBytes(ts.uTest);
生成的exe后,反编译:
public static unsafe byte[] GetBytes(double value)
{
return GetBytes(*((long*) &value));
}
public static unsafe byte[] GetBytes(long value)
{
byte[] buffer = new byte[8];
fixed (byte* numRef = buffer)
{
*((long*) numRef) = value;
}
return buffer;
}
public static unsafe double ToDouble(byte[] value, int startIndex)
{
return *(((double*) &ToInt64(value, startIndex)));
}
public static unsafe short ToInt16(byte[] value, int startIndex)
{
if (value == null)
{
ThrowHelper.ThrowArgumentNullException(ExceptionArgument.value);
}
if (((ulong) startIndex) >= value.Length)
{
ThrowHelper.ThrowArgumentOutOfRangeException(ExceptionArgument.startIndex, ExceptionResource.ArgumentOutOfRange_Index);
}
if (startIndex > (value.Length - 2))
{
ThrowHelper.ThrowArgumentException(ExceptionResource.Arg_ArrayPlusOffTooSmall);
}
fixed (byte* numRef = &(value[startIndex]))
{
if ((startIndex % 2) == 0)
{
return *(((short*) numRef));
}
if (IsLittleEndian)
{
return (short) (numRef[0] | (numRef[1] << 8));
}
return (short) ((numRef[0] << 8) | numRef[1]);
}
}
本文探讨了C#中使用BitConverter进行数值转换的内部机制,通过反编译生成的exe文件,展示了unsafe代码如何处理字节序列化和反序列化,包括对double、long类型的处理,以及在处理short类型时对小端序和大端序的考虑。
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