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-rw-r--r--src/vppinfra/test_phash.c149
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+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+/*
+ Copyright (c) 2005 Eliot Dresselhaus
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ "Software"), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be
+ included in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
+ LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
+ OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
+ WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+*/
+
+#include <vppinfra/phash.h>
+#include <vppinfra/format.h>
+#include <vppinfra/random.h>
+
+static int verbose;
+#define if_verbose(format,args...) \
+ if (verbose) { clib_warning(format, ## args); }
+
+int
+test_phash_main (unformat_input_t * input)
+{
+ phash_main_t _pm = { 0 }, *pm = &_pm;
+ int n_keys, random_keys;
+ u32 seed;
+ clib_error_t *error;
+
+ random_keys = 1;
+ n_keys = 1000;
+ while (unformat_check_input (input) != UNFORMAT_END_OF_INPUT)
+ {
+ if (0 == unformat (input, "keys %d", &n_keys)
+ && 0 == unformat (input, "verbose %=", &verbose, 1)
+ && 0 == unformat (input, "random-keys %=", &random_keys, 1)
+ && 0 == unformat (input, "sequential-keys %=", &random_keys, 0)
+ && 0 == unformat (input, "seed %d", &pm->random_seed)
+ && 0 == unformat (input, "64-bit %|", &pm->flags, PHASH_FLAG_MIX64)
+ && 0 == unformat (input, "32-bit %|", &pm->flags, PHASH_FLAG_MIX32)
+ && 0 == unformat (input, "fast %|", &pm->flags,
+ PHASH_FLAG_FAST_MODE)
+ && 0 == unformat (input, "slow %|", &pm->flags,
+ PHASH_FLAG_SLOW_MODE)
+ && 0 == unformat (input, "minimal %|", &pm->flags,
+ PHASH_FLAG_MINIMAL)
+ && 0 == unformat (input, "non-minimal %|", &pm->flags,
+ PHASH_FLAG_NON_MINIMAL))
+ clib_error ("unknown input `%U'", format_unformat_error, input);
+ }
+
+ if (!pm->random_seed)
+ pm->random_seed = random_default_seed ();
+
+ if_verbose
+ ("%d %d-bit keys, random seed %d, %s mode, looking for %sminimal hash",
+ n_keys, (pm->flags & PHASH_FLAG_MIX64) ? 64 : 32, pm->random_seed,
+ (pm->flags & PHASH_FLAG_FAST_MODE) ? "fast" : "slow",
+ (pm->flags & PHASH_FLAG_MINIMAL) ? "" : "non-");
+
+ seed = pm->random_seed;
+
+ /* Initialize random keys. */
+ {
+ phash_key_t *k;
+
+ vec_resize (pm->keys, n_keys);
+ vec_foreach (k, pm->keys)
+ {
+ k->key = k - pm->keys;
+ if (random_keys)
+ {
+ if (pm->flags & PHASH_FLAG_MIX64)
+ k->key = random_u64 (&seed);
+ else
+ k->key = random_u32 (&seed);
+ }
+ }
+ }
+
+ error = phash_find_perfect_hash (pm);
+ if (error)
+ {
+ clib_error_report (error);
+ return 1;
+ }
+ else
+ {
+ if_verbose ("(%d,%d) (a,b) bits, %d seeds tried, %d tree walks",
+ pm->a_bits, pm->b_bits,
+ pm->n_seed_trials, pm->n_perfect_calls);
+
+ error = phash_validate (pm);
+ if (error)
+ {
+ clib_error_report (error);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+
+#ifdef CLIB_UNIX
+int
+main (int argc, char *argv[])
+{
+ unformat_input_t i;
+ int res;
+
+ verbose = (argc > 1);
+ unformat_init_command_line (&i, argv);
+ res = test_phash_main (&i);
+ unformat_free (&i);
+ return res;
+}
+#endif
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */