/* Ruby 1.8.6+ macros (for compatibility with Ruby 1.9) */
#ifndef RSTRING_PTR
#  define RSTRING_PTR(s) (RSTRING(s)->ptr)
#endif
#ifndef RSTRING_LEN
#  define RSTRING_LEN(s) (RSTRING(s)->len)
#endif
#ifndef RARRAY_LEN
#  define RARRAY_LEN(s) (RARRAY(s)->len)
#endif

#ifndef HAVE_RB_STR_SET_LEN
/* this is taken from Ruby 1.8.7, 1.8.6 may not have it */
static void rb_18_str_set_len(VALUE str, long len)
{
	RSTRING(str)->len = len;
	RSTRING(str)->ptr[len] = '\0';
}
#define rb_str_set_len(str,len) rb_18_str_set_len(str,len)
#endif