Re: [Vala] GMP vapi

[Luca Bruno <lethalman88 gmail com>]

On Wed, Aug 10, 2011 at 11:20:49PM +0300, Jeremiah Shaulov wrote:
> Hi,
>
> I posted gmp.vapi to live.gnome.org:
> http://live.gnome.org/Vala/ExternalBindings?action=AttachFile&do=view&target=gmp.vapi

You forgot to list it in the page.

> Everybody is welcome to download.
>
> I found no way to make this binding standalone, and i wrote about this
> in the list. So additional C header file is required to compile. Create
> file named "gmp-vapi.h" with the following content (this is also noted
> in gmp.vapi in top comment):
>
> #include <stdio.h>
> #include <string.h>
> #include <gmp.h>
> #
> #ifndef vala_mpz_init
> #
> #     define vala_mpz_init(self, bitcnt) (bitcnt==0 ? \
> (void)mpz_init(self) : (void)mpz_init2(self, bitcnt))
> #     define vala_mpf_init(self, bitcnt) (bitcnt==0 ? \
> (void)mpf_init(self) : (void)mpf_init2(self, bitcnt))
> #
> #     define vala_gmp_randstate_copy(from, to) \
> gmp_randinit_set(to, from)
> #     define vala_mpz_copy(from, to) mpz_init_set(to, from)
> #     define vala_mpf_copy(from, to) mpf_init_set(to, from)
> #
> #endif

You don't need this header, and you don't want people to use an external
header.

> Example program "test.vala":
>
> using GLib;
> using Gmp;
>
> public class Test : Object
> {     public static int main (string[] args)
>       {       var a = Float.string("123.456");
>               var b = Float.double(987.654);
>
>               a.mul(a, b); // a = a * b
>
>               Gmp.printf("Result: %Ff\n", a);
>
>               return 0;
>     }
> }
>
> Compile:
>
> valac test2.vala --pkg gmp --vapidir="." -X -I. -X -lgmp
>
> --vapidir="." is needed if gmp.vapi is located in current directory,
> instead of default location (/usr/share/vala/vapi/).
>
> -X -I. is needed if gmp-vapi.h is located in current directory, instead
> of default location (/usr/include/).
>
> -X -lgmp is always needed since GMP doesn't support pkg-config.

You can add this example to the wiki together with all other examples.

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