Any "easy" example of using T_HASH in a C extension?

[Iñaki Baz Castillo]

Hi, I've found some tutorials explaining how to create and manipulat a Ruby=
=20
array from a C extension using T_ARRAY and its realted functions.
However I find nothing about T_HASH, and trying to extract the functions fr=
om=20
Ruby "hash.c" code is... not very cool.

Is there any tutorial about creating a simple hash in Ruby C extension?

Thanks a lot.

=2D-=20
I=C3=B1aki Baz Castillo <[email protected]>

 

[Aaron Patterson]

Hi, I've found some tutorials explaining how to create and manipulat =20=

a Ruby
array from a C extension using T_ARRAY and its realted functions.
However I find nothing about T_HASH, and trying to extract the =20
functions from
Ruby "hash.c" code is... not very cool.

Sure it is! All of the hipsters at Beauty Bar were talking about it =20
the other night. But you'd better hop on board quickly before it =20
becomes uncool, otherwise you're going to have to wait until it =20
becomes "retro cool".

Is there any tutorial about creating a simple hash in Ruby C =20
extension?

rb_hash_new(void)
rb_hash_aset(VALUE hash, VALUE key, VALUE val)
rb_hash_aref(VALUE hash, VALUE key)

Though, if you're just doing hash manipulation, why not just do it in =20=

Ruby?

 

[Iñaki Baz Castillo]

El Lunes, 12 de Octubre de 2009, Aaron Patterson escribi=F3:

=20
Sure it is! All of the hipsters at Beauty Bar were talking about it
the other night. But you'd better hop on board quickly before it
becomes uncool, otherwise you're going to have to wait until it
becomes "retro cool".

=20
rb_hash_new(void)
rb_hash_aset(VALUE hash, VALUE key, VALUE val)
rb_hash_aref(VALUE hash, VALUE key)

Yeah! just found these functions in an online presentation.
=20

Though, if you're just doing hash manipulation, why not just do it in
Ruby?

Not exactly. I've coded a parser in C and it must return a Ruby hash.

Thanks a lot.



=2D-=20
I=F1aki Baz Castillo <[email protected]>

 

[Dirkjan Bussink]

Hi, I've found some tutorials explaining how to create and manipulat =20=

a Ruby
array from a C extension using T_ARRAY and its realted functions.
However I find nothing about T_HASH, and trying to extract the =20
functions from
Ruby "hash.c" code is... not very cool.

I'd advise against using T_ARRAY, RARRAY_PTR etc, writing stuff with =20
the following methods makes life a lot easier for other Ruby =20
implementations that also support MRI C extensions:

rb_ary_new(void);
rb_ary_push(VALUE array, VALUE element);
rb_ary_entry(VALUE array, long i);
rb_ary_store(VALUE array, long i, VALUE element);

--=20
Regards,

Dirkjan Bussink

 

[Iñaki Baz Castillo]

El Lunes, 12 de Octubre de 2009, Dirkjan Bussink escribi=F3:

=20
I'd advise against using T_ARRAY, RARRAY_PTR etc, writing stuff with
the following methods makes life a lot easier for other Ruby
implementations that also support MRI C extensions:
=20
rb_ary_new(void);
rb_ary_push(VALUE array, VALUE element);
rb_ary_entry(VALUE array, long i);
rb_ary_store(VALUE array, long i, VALUE element);

Yes, finally I used just "rb_hash_new" and "rb_hash_aset" functions.


=2D-=20
I=F1aki Baz Castillo <[email protected]>