OpenEuphoria

1. Euphoria equivalent to C typecasting

• Posted by Jonas Temple <jtemple at yhti.net> Aug 02, 2004
• 537 views

All,

Dumb question time.  I'm trying to come up with the Euphoria equivalent
of the following code that gets a floating point value from a spot
in memory:

longBuffer = (long *) (dataBuffer + bufferIndex);
sprintf(prtBuffer+bufferCount+columnInfo[colIndex].width-11,
        "%11ld", *longBuffer);

longBuffer is defined as "long * longBuffer;"

Any ideas?

Thanks,

Jonas

3. Re: Euphoria equivalent to C typecasting

• Posted by Matt Lewis <matthewwalkerlewis at yahoo.com> Aug 02, 2004
• 536 views

Jonas Temple wrote:
> 
> > 
> I apologize, I copied the wrong section.  What I'm really interested in
> is in extracting the floating point value from the memory location:
> 
> floatBuffer = (float *) (dataBuffer + bufferIndex);
> sprintf(prtBuffer+bufferCount+columnInfo[colIndex].width-16,
>         "%.8E", *floatBuffer);
> 

This is just a 32-bit floating point number, so you could convert using:

float = float32_to_atom( peek( { dataBuffer + bufferIndex, 4}))
-- C writes the output of sprintf to a buffer, but
-- we just stick it in a sequence in Euphoria:
text  = sprintf( "%0.8e", float )

Matt Lewis