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guile/test-suite/standalone/test-scm-values.c
Mark H Weaver 1ceeca0a76 Add `scm_c_value_ref' to allow access to multiple returned values from C
Based on a patch by Julian Graham <julian@member.fsf.org>

* libguile/values.c, libguile/values.h (scm_c_value_ref): New function.
* doc/ref/api-control.texi (Multiple Values): Add documentation.
* test-suite/standalone/test-scm-values.c: New test program.
* test-suite/standalone/Makefile.am: Add test-scm-values test.
2012-01-18 18:01:48 -05:00

69 lines
2 KiB
C

/* Copyright (C) 2012 Free Software Foundation, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public License
* as published by the Free Software Foundation; either version 3 of
* the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <libguile.h>
#include <stdlib.h>
#include <string.h>
static void
test_scm_c_value_ref_on_multiple_values ()
{
SCM values = scm_values (scm_list_3 (scm_from_latin1_string ("foo"),
scm_from_latin1_string ("bar"),
scm_from_latin1_string ("baz")));
char *foo = scm_to_latin1_string (scm_c_value_ref (values, 0));
char *bar = scm_to_latin1_string (scm_c_value_ref (values, 1));
char *baz = scm_to_latin1_string (scm_c_value_ref (values, 2));
assert (strcmp (foo, "foo") == 0);
assert (strcmp (bar, "bar") == 0);
assert (strcmp (baz, "baz") == 0);
free (foo);
free (bar);
free (baz);
}
static void
test_scm_c_value_ref_on_a_single_value ()
{
SCM value = scm_from_latin1_string ("foo");
char *foo = scm_to_latin1_string (scm_c_value_ref (value, 0));
assert (strcmp (foo, "foo") == 0);
free (foo);
}
static void
tests (void *data, int argc, char **argv)
{
test_scm_c_value_ref_on_multiple_values ();
test_scm_c_value_ref_on_a_single_value ();
}
int
main (int argc, char *argv[])
{
scm_boot_guile (argc, argv, tests, NULL);
return 0;
}