This does not work. The C code has: typedef float float128_t; You could map it to gcc's 128 bit floating point type (https://gcc.gnu. org/onlinedocs/gcc/Floating-Types.html) or use the 80-bit long double type (https://stackoverflow.com/questions/13516476/long-double-gcc-spec ific-and-float128)
Neither of these options are standard. For arbitrary precision math in C I like to use https://gmplib.org/. On Mon, 2016-05-23 at 21:26 -0500, Guillaume Poirier-Morency wrote: > It's possible to declare these types if you need to use them. > > https://wiki.gnome.org/Projects/Vala/Manual/Attributes#FloatingType_A > tt > ribute > > [CCode (has_type_id = false)] > [FloatingType (decimal = false, rank = 12, width = 128] > struct float128_t {} > > Like Daniel said, Vala primitive types are mapped to GLib's type with > the GType system, so it's not really the language's fault if there is > no support for 128 bit floating points. It's not a common use case > either way. > > With 'has_type_id = false', the compiler knows that there's no type > information to retreive. > > Rank 12 does not really exist, but that would be the appropriate > value > since 10 and 11 are for signed and unsigned 64 bit types. > > It might be handy to have a VAPI for that in 'vala-extra-vapis'. > > Cheers and best luck, > > Le lundi 23 mai 2016 à 09:59 +0300, Vitaly V. Ch a écrit : > > Ok, Thanks. > > > > It clarifies the situation. > > > > With best regards, > > > > Vitaly Chernooky > > > > On Mon, May 23, 2016 at 4:51 AM, Daniel Espinosa <eso...@gmail.com> > > wrote: > > > > > May you should be able to create your own basic type. > > > > > > May should be a guide to do so. > > > > > > GLib should have this types too, before you are able to create > > > your > > > basic > > > types. This means you should define a GType for a basic type, in > > > this case > > > your long double. > > > > > > May we can create a library to define this math basic types, to > > > be > > > used in > > > other libraries. This is not a GLib interest, I think, because is > > > not a > > > primary Math library. > > > > > > I was working a little in that, but may you should ask to gtk- > > > list > > > for > > > help on defining this new types. > > > > > > In other ideas, is required to use that types or is possible to > > > use > > > some > > > structs holding your information in a way to be used in other > > > methods, that > > > may take that structs an do calculations using that types > > > internally, > > > written in C with Vala bindings [1], then return again that > > > structs. > > > > > > [] See git.gnome.org/browse/gxml it uses simple C methods and > > > Vala > > > bindings to be used in Vala code for xlibxml > > > El may. 22, 2016 3:23 PM, "Vitaly V. Ch" <vitaly.v...@gmail.com> > > > escribió: > > > > > > Hi All! > > > > > > Some time ago Vala has pulled my attention as a way to solve some > > > kind of > > > math problems. But some time later I realized that this cozy and > > > beautiful > > > staff does not have extended floating datatypes such as long > > > double > > > or > > > float128_t. This fact disappointed me and I'm interested in some > > > comments. > > > > > > With best regards, > > > > > > Vitaly Chernooky > > > _______________________________________________ > > > vala-list mailing list > > > vala-list@gnome.org > > > https://mail.gnome.org/mailman/listinfo/vala-list > > > > > > > > _______________________________________________ > > vala-list mailing list > > vala-list@gnome.org > > https://mail.gnome.org/mailman/listinfo/vala-list > _______________________________________________ > vala-list mailing list > vala-list@gnome.org > https://mail.gnome.org/mailman/listinfo/vala-list _______________________________________________ vala-list mailing list vala-list@gnome.org https://mail.gnome.org/mailman/listinfo/vala-list
