On Sun, 2011-09-18 at 17:30 +0200, Thien-Thi Nguyen wrote:
> The double-quote stripping is kind of hacky. I would create a port
> and ‘display’ the result of ‘scm_c_eval_string’ to it.
Thanks for the hints. I've reworked my code to implement a generic "SCM
to make string" function; currently it looks like this:
char *
cvt_scm_to_str (SCM obj)
{
char *str;
if (scm_is_bool (obj) && scm_is_true (obj))
str = xstrdup ("t");
else if (scm_is_number (obj) || scm_is_string (obj) || scm_is_symbol
(obj))
{
SCM port = scm_open_output_string ();
scm_display (obj, port);
str = scm_to_locale_string (scm_get_output_string (port));
scm_close_output_port (port);
}
else
str = xstrdup ("");
return str;
}
That's better than what I had before, but I still have some concerns.
For example, what if a Guile call wanted to return a list? I can use
display as above, but the list will be enclosed in parentheses, which is
not how make displays lists. Is there a clean way to handle this? I
could write a function then invoke it with scm_map() (right?) but this
seems like it might be work. Also what if the data structure is more
complex, where some elements of the list are lists themselves, etc.? I
can "flatten" the entire thing out, I suppose.
Or I could ignore them as above and require the Guile scripting to
convert the list into a string before returning it.
--
-------------------------------------------------------------------------------
Paul D. Smith <psm...@gnu.org> Find some GNU make tips at:
http://www.gnu.org http://make.mad-scientist.net
"Please remain calm...I may be mad, but I am a professional." --Mad Scientist
