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/* Copyright 2022-2023
Free Software Foundation, Inc.
This file is part of Guile.
Guile 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.
Guile 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 Guile. If not, see
<https://www.gnu.org/licenses/>. */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <libguile.h>
#include <stdio.h>
static void
test_hashing ()
{
// Make sure a utf-8 symbol has the expected hash. In addition to
// catching algorithmic regressions, this would have caught a
// long-standing buffer overflow.
// Περί
char about_u8[] = {0xce, 0xa0, 0xce, 0xb5, 0xcf, 0x81, 0xce, 0xaf, 0};
SCM sym = scm_from_utf8_symbol (about_u8);
// Value determined by calling wide_string_hash on {0x3A0, 0x3B5,
// 0x3C1, 0x3AF} via a temporary test program.
const unsigned long expect = 4029223418961680680;
const unsigned long actual = scm_to_ulong (scm_symbol_hash (sym));
if (actual != expect)
{
fprintf (stderr, "fail: unexpected utf-8 symbol hash (%lu != %lu)\n",
actual, expect);
exit (EXIT_FAILURE);
}
}
static void
tests (void *data, int argc, char **argv)
{
test_hashing ();
}
int
main (int argc, char *argv[])
{
scm_boot_guile (argc, argv, tests, NULL);
return 0;
}
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