1. Re: C to Euphoria
Antoine Delle Donne wrote:
>
> > > How to convert these structures in Euphoria and will they
> > > keep the same size as in C. For example structure IDNAME is
> > > 162 bytes long Will it still be 162 bytes long in Euphoria?
> >
> > Euphoria does not have structures like C.
> > Euphoria has atoms and sequences (only).
>
> I know Euphoria does not have structures that is why I would like to know
> what would be the equivalent of this in Euphoria Style.
> typedef struct {
> unsigned int no;
> char n[4][32];
> char tel[16],fax[16];
> } IDNAME;
>
Euphoria uses dynamic sizing for these things. Static sizes will take up
more space,
especially in the example you give (name/addr/phone number - which
usually have a lot
of short names and blank spaces).
example 1:
constant NO = 1, NAME = 2, ADDR = 3, CITY = 4, STATE = 5, TEL = 6, FAX =
7
sequence idname
idname = repeat({},7)
idname[NO] = 1000
idname[NAME] = "Joe Smith"
idname[TEL] = "123-456-7890"
etc...
each "field" uses only the space required to store the data, not a fixed
32 bytes or
whatever. If you have to read and write files created by C, there is a
way to get
around the dynamic sizing:
To fix the lengths:
idname[NAME] = repeat(" ",32)
idname[TEL] = repeat(" ",16)
etc...
but, when you assign idname[NAME} = "Joe Smith", the length is adjusted
downward
to fit "Joe Smith".
If for some reason you must maintain fixed length fields, you have to
pad each ome to
the proper length. printf(fn,"%32s",{idname[NAME]}) is one way. Expanded
to the example
above:
printf(fn,"%d %32s %32s %32s %32s %16s %16s",{idname})
Use a minus sign ("%-32s") to left justify. You may want to take out the
spaces,
I left them in for readability.
Hope this is what you were asking. There's an example program on my
Euphoria ftp
site: http://www.mindspring.com/~mountains (ftp download filename
STOCK.ZIP) that
does this kind of thing.
Regards,
Irv
