From: unbewust <yvon.thoraval@...>
Date: 2007-08-07T21:59:58+09:00
Subject: [C ext to Ruby] how to scan a RARRAY ???

from ruby.h :

struct RArray {
    struct RBasic basic;
    long len;
    union {
	long capa;
	VALUE shared;
    } aux;
    VALUE *ptr;
};


my module make use of :
VALUE m_set_icon(VALUE self, VALUE src_path, VALUE dst_pathes[])

dst_pathes is a T_ARRAY

int len = RARRAY(dst_pathes)->len;
printf("len = %d\n", len);
char *cdst_pathes[len];

how to duplicated the VALUE (shared) from the struct RArray into
cdst_pathes (an Array of char *) ???


i don't see how to use the VALUE *ptr, ie. in my case :
RARRAY(dst_pathes)->ptr

ruby side :

require 'rseticon'

include RSetIcon

puts "RSetIcon : version = " + version()
puts "RSetIcon : set_icon(\"aIcon.icns\", [\"un\", \"deux\", \"trois
\"]) = " + set_icon("aIcon.icns", ["un", "deux", "trois"]).to_s

gives the obvious result : [un, deux, trois].


"un", "deux", "trois" will be the pathes of files where we want to
apply the icon "aIcon.icns" (first arg of set_icon).

then, i want to retrieve, in the C side as a CString the pathes where
to apply the icon.

i don't see how to use RARRAY(dst_pathes)->ptr to scan the VALUEs (in
the union aux) ???

thanks in advance ;-)

Yvon