File: init.c

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#include "ruby.h"

#define init(n) {void Init_##n(VALUE klass); Init_##n(klass);}

static VALUE
sym_find(VALUE dummy, VALUE sym)
{
    return rb_check_symbol(&sym);
}

static VALUE
sym_pinneddown_p(VALUE dummy, VALUE sym)
{
    ID id = rb_check_id(&sym);
    if (!id) return Qnil;
#ifdef ULL2NUM
    return ULL2NUM(id);
#else
    return ULONG2NUM(id);
#endif
}

static VALUE
sym_iv_get(VALUE dummy, VALUE obj, VALUE name)
{
    const char *n = StringValueCStr(name);
    return rb_iv_get(obj, n);
}

void
Init_symbol(void)
{
    VALUE mBug = rb_define_module("Bug");
    VALUE klass = rb_define_class_under(mBug, "Symbol", rb_cSymbol);
    rb_define_singleton_method(klass, "find", sym_find, 1);
    rb_define_singleton_method(klass, "pinneddown?", sym_pinneddown_p, 1);
    rb_define_singleton_method(klass, "iv_get", sym_iv_get, 2);
    TEST_INIT_FUNCS(init);
}