From: unbewusst <yvon.thoraval@...>
Date: 2007-08-18T20:59:59+09:00
Subject: [C ext to Ruby] how to read a ruby symbol from C ?

I'm now able to produce a ruby symbol from C

I'm also able to read the keys of a hash, i need to know how to
transform a key being a T_SYMBOL into a cstring (the reverse) ???

also using :


long size = RHASH( ( VALUE )options_hash )->tbl->num_entries;

i get the following error at compil time :
symbol_test.c: In function m_symbol_test_init:
symbol_test.c:109: error: dereferencing pointer to incomplete type

i don't understand very much this message.
however i can get the hash size by :

hlen = RARRAY( keys )->len;

with :

VALUE keys = rb_funcall( options_hash, rb_intern( "keys" ), 0 );

my "options_hash" is coming from :

rb_scan_args( argc, argv, "11", &src_path, &options_hash );

it is a VALUE :

VALUE src_path, options_hash, noop, verbose;


help appreciated,

Yvon