From: unbewust <yvon.thoraval@...>
Date: 2007-08-17T17:59:57+09:00
Subject: [C ext to Ruby] how to get the key, value pairs of  RHASH ???

i'd like to have, in my module options (is in FileUtils for ex) like
that in the Ruby side:

symt = SYMBOL_TEST.new( "/my/src/path", :verbose => true, :noop =>
true )

i know, from experiment, that, in my C init i get 2 VALUES in that
case the first being a RString the second an RHash.

if i look at ruby.h i get :


struct RHash {
    struct RBasic basic;
    struct st_table *tbl;
    int iter_lev;
    VALUE ifnone;
};

i didn't found anything about "struct st_table *tbl" i imagine that's
here the key/value pairs are stored ???

but how to retrieve them ???

generally speaking where could i find examples for each type of
struct ???

because i'll need in the near future the same kind of knoledge about :


struct RRegexp {
    struct RBasic basic;
    struct re_pattern_buffer *ptr;
    long len;
    char *str;
};

struct RFile {
    struct RBasic basic;
    struct OpenFile *fptr;
};

struct RData {
    struct RBasic basic;
    void (*dmark)(void*);
    void (*dfree)(void*);
    void *data;
};


best,

Yvon