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 :: Mailing Lists

[ILUG] 8 bytes to double conversion

[ILUG] 8 bytes to double conversion

McDaid, Aaron Aaron.McDaid at compaq.com
Tue May 2 17:02:35 IST 2000


> is there a function out there that will convert a 8-byte string into a
> double
> 
> something like
> 
> 
> double Bytes_To_double(unsigned char input_bytes[8])
> {
>   double newdouble;
>   newdouble  =  input_bytes[7]<<56;
>   newdouble += input_bytes[6]<<48;
>   newdouble += input_bytes[5]<<40;
>   newdouble += input_bytes[4]<<32;
>   newdouble += input_bytes[3]<<24;
>   newdouble += input_bytes[2]<<16;
>   newdouble += input_bytes[1]<<8;
>   newdouble += input_bytes[0];
>   return newdouble;
> } 

Do you mean just casting it as a double?
Although I can't really think how you would write
the code to cast after dereferencing the pointer
to the array.

Anyway there's got to be a cuter way of implementing
the above using recursive calls and such or maybe
even just a for(;;) loop. I'll get back
to you on that (if anyone else cares about it!)

PS: How *dare* you assume double will always be 8 bytes!




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