[Gambas-user] Hex string to float

[nando]

brilliant!


---------- Original Message -----------
From: Benoit Minisini <gambas at ...1...>
To: nando_f at ...951..., mailing list for gambas users
<gambas-user at lists.sourceforge.net>
Sent: Sun, 14 Dec 2008 22:28:35 +0100
Subject: Re: [Gambas-user] Hex string to float

> On dimanche 14 décembre 2008, nando wrote:
> > My apologies to all...I stand corrected for my mistake.
> > The i = &h3fd55555& converts hex to integer and is easiest to do it this
> > way. This method does performs as the original person wanted but is a waste
> > to do disk IO.  Perhaps a pipe, write the integer, read the single.
> > Although I haven't investigated, Gambas3 has pointers.
> > Copying 4B from a pointer to the 4B int to the 4B single will do it.
> > There are (older) versions of BASIC that had (something like) MKI$, MKS$,
> > MKD$ and counterparts (something like) CVI, CVS, CVD.  They took a string
> > and converted it to an Int Single Double.  No conversion happened because
> > the string was binary correct for the type. All it did was copy 2B, 4B 8B
> > from/to a numeric var to/from string.
> >  If Benoit were to incorporate these functions, it makes Gambas easily
> > perform IO of data types with ease to convert to native variables.
> > Thanks,
> > -Fernando
> >
> 
> Yeh, this is planed.
> 
> Anyway, you can do these conversion in Gambas 2 (and 3) this way:
> 
> DIM sSrc AS String
> DIM eDst AS Float
> DIM pPtr AS Pointer
> 
> pPtr = Alloc(8)
> WRITE #pPtr, sSrc, 8
> READ #pPtr, eDst
> Free(pPtr)
> 
> But beware with the endianness!
> 
> -- 
> Benoit Minisini
> 
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------- End of Original Message -------