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
---------- Original Message ----------- From: Doriano Blengino <doriano.bleng...@fastwebnet.it> To: nand...@nothingsimple.com, mailing list for gambas users <gambas-user@lists.sourceforge.net> Sent: Sat, 13 Dec 2008 20:05:54 +0100 Subject: Re: [Gambas-user] Hex string to float > nando ha scritto: > > I'm sorry, but I cannot see this as correct. > > Saving a 4 byte value in integer format then > > reading in the same 4 byte value and place it in an float variable > > performs no conversion. > > Conversion is needed due to how we want to interpret the type of data. > > > Indeed it does (perhaps a different syntax should be used - the one > which writes in binary format). The problem is that it is easy to write > an integer constant in the correct form (&h...); different is the case > when you read them from somewhere - they can have a different byte order > or format (in this case you can manipulate them). > > Another problem is to use a file for doing this - this is a great waste > of resources; gambas has pointers too, but they are difficult to use. > > Regards, > Doriano > > > > > > ---------- Original Message ----------- > > From: hjherb...@web.de > > To: gambas-user@lists.sourceforge.net > > Sent: Sat, 13 Dec 2008 17:21:39 +0100 > > Subject: Re: [Gambas-user] Hex string to float > > > > > >> ... For 32 Float use the "Single" data type. > >> See http://gambasdoc.org/help/cat/datatypes > >> See http://gambasdoc.org/help/lang/type/single > >> > >> The example conversion may be done by this way: > >> > >> PUBLIC SUB DemoSingle() > >> DIM i AS Integer > >> DIM f AS Single > >> DIM hH AS File > >> > >> i = &h3fd55555& > >> OPEN "/tmp/hexfloat.tmp" FOR WRITE CREATE AS #hH > >> WRITE #hH, i > >> CLOSE #hH > >> OPEN "/tmp/hexfloat.tmp" FOR READ AS #hH > >> READ #hH, f > >> CLOSE #hH > >> PRINT "i=", i, "HEX", Hex$(i), " f=", f > >> END > >> > >> ------------------------------------------------------------------------------ > >> SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > >> The future of the web can't happen without you. Join us at MIX09 to help > >> pave the way to the Next Web now. Learn more and register at > >> http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > >> _______________________________________________ > >> Gambas-user mailing list > >> Gambas-user@lists.sourceforge.net > >> https://lists.sourceforge.net/lists/listinfo/gambas-user > >> > > ------- End of Original Message ------- > > > > > > ------------------------------------------------------------------------------ > > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > > The future of the web can't happen without you. Join us at MIX09 to help > > pave the way to the Next Web now. Learn more and register at > > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > > _______________________________________________ > > Gambas-user mailing list > > Gambas-user@lists.sourceforge.net > > https://lists.sourceforge.net/lists/listinfo/gambas-user > > > > -- > Doriano Blengino > > "Listen twice before you speak. > This is why we have two ears, but only one mouth." > > ------------------------------------------------------------------------------ > SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. > The future of the web can't happen without you. Join us at MIX09 to help > pave the way to the Next Web now. Learn more and register at > http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ > _______________________________________________ > Gambas-user mailing list > Gambas-user@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/gambas-user ------- End of Original Message ------- ------------------------------------------------------------------------------ SF.Net email is Sponsored by MIX09, March 18-20, 2009 in Las Vegas, Nevada. The future of the web can't happen without you. Join us at MIX09 to help pave the way to the Next Web now. Learn more and register at http://ad.doubleclick.net/clk;208669438;13503038;i?http://2009.visitmix.com/ _______________________________________________ Gambas-user mailing list Gambas-user@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/gambas-user
