将浮点值从大端转换为小端 [英] Converting float values from big endian to little endian

问题描述

是否可以将浮点数从大到小转换？我有一个值从一个PowerPC（大端）平台，我通过TCP发送到Windows进程（小端）。这个值是一个浮点数，但当我 memcpy 的值到一个win32 float类型，然后调用 _byteswap_ulong 那个值，我总是得到0.0000？

Is it possible to convert floats from big to little endian? I have a value from a PowerPC(big endian)platform that I am send via TCP to a Windows process (little endian). This value is a float, but when I "memcpy" the value into a win32 float type and then call _byteswap_ulongon that value, I always get 0.0000?

我做错了什么？

推荐答案

字节工作

float ReverseFloat( const float inFloat )
{
   float retVal;
   char *floatToConvert = ( char* ) & inFloat;
   char *returnFloat = ( char* ) & retVal;

   // swap the bytes into a temporary buffer
   returnFloat[0] = floatToConvert[3];
   returnFloat[1] = floatToConvert[2];
   returnFloat[2] = floatToConvert[1];
   returnFloat[3] = floatToConvert[0];

   return retVal;
}

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