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troubleshooting Question

warning C4311: 'type cast' : pointer truncation

Avatar of ksmathy
ksmathy asked on
Editors IDEs
5 Comments1 Solution1725 ViewsLast Modified:
Hi
I have tried to write method which take two 16 bits as input and return on 32 bits number.    
I have an warning msg (pointer truncation)in following method.
This warning messge can be ignored or cause the problems
UInt32 getInt32FromInt16(UInt16 MSW,UInt16 LSW)
{
   UInt32 *pInt[4];
   memcpy(&pInt[0],&LSW,2);
   memcpy(&pInt[2],&MSW,2);
   return ((UInt32)*pInt);
}
but the below method does not give error msg
UInt64 getInt64FromInt32(UInt32 MSW,UInt32 LSW)
{
   UInt64 *pInt[8];
   memcpy(&pInt[0],&LSW,4);
   memcpy(&pInt[4],&MSW,4);
   return ((UInt64)*pInt);
}

is there any other methods which coverts two 16 (or 32)bits into one 32(or 64) bit

In reverse, I also write the method which take large number(32bits) as an input and put it into two 16 bits buffer
void setInt32FromInt16(UInt16& MSW,UInt16& LSW,UInt32 anInteger)
{
  char * pCharBuffer = (char*)&anInteger;
   UInt16 * pLSW = (UInt16*)&pCharBuffer[0];
   UInt16 * pMSW = (UInt16*)&pCharBuffer[2];
   MSW=* pMSW ;
   LSW=* pLSW ;
}
I just wondering, this method is ok or not
could you please help me out

Thanks
Mat
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