--- /dev/null
+/*
+ * Copyright (C) 2009 Free Software Foundation
+ * Written by Jim Meyering
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+#include "hash.h"
+#include "hash-pjw.h"
+#include "inttostr.h"
+#include "xalloc.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdbool.h>
+#include <string.h>
+#include <unistd.h>
+
+#define STREQ(a, b) (strcmp (a, b) == 0)
+
+#define ASSERT(expr) \
+ do \
+ { \
+ if (!(expr)) \
+ { \
+ fprintf (stderr, "%s:%d: assertion failed\n", __FILE__, __LINE__); \
+ fflush (stderr); \
+ abort (); \
+ } \
+ } \
+ while (0)
+
+static bool
+hash_compare_strings (void const *x, void const *y)
+{
+ return STREQ (x, y) ? true : false;
+}
+
+static void
+hash_freer (void *x)
+{
+ free (x);
+}
+
+static void
+insert_new (Hash_table *ht, void *ent)
+{
+ void *e = hash_insert (ht, ent);
+ ASSERT (e == ent);
+}
+
+static bool
+walk (void *ent, void *data)
+{
+ char *str = ent;
+ unsigned int *map = data;
+ switch (*str)
+ {
+ case 'a': *map |= 1; return true;
+ case 'b': *map |= 2; return true;
+ case 'c': *map |= 4; return true;
+ }
+ *map |= 8;
+ return false;
+}
+
+int
+main (void)
+{
+ unsigned int i;
+ Hash_table *ht = hash_initialize (53, NULL, hash_pjw,
+ hash_compare_strings, NULL);
+ Hash_tuning tuning;
+
+ ASSERT (ht);
+ insert_new (ht, "a");
+ {
+ char *str1 = xstrdup ("a");
+ char *str2 = hash_insert (ht, str1);
+ ASSERT (str1 != str2);
+ ASSERT (STREQ (str1, str2));
+ free (str1);
+ }
+ insert_new (ht, "b");
+ insert_new (ht, "c");
+ i = 0;
+ ASSERT (hash_do_for_each (ht, walk, &i) == 3);
+ ASSERT (i == 7);
+ {
+ void *buf[5] = { NULL };
+ ASSERT (hash_get_entries (ht, NULL, 0) == 0);
+ ASSERT (hash_get_entries (ht, buf, 5) == 3);
+ ASSERT (STREQ (buf[0], "a") || STREQ (buf[0], "b") || STREQ (buf[0], "c"));
+ }
+ ASSERT (hash_delete (ht, "a"));
+ ASSERT (hash_delete (ht, "a") == NULL);
+ ASSERT (hash_delete (ht, "b"));
+ ASSERT (hash_delete (ht, "c"));
+
+ ASSERT (hash_rehash (ht, 47));
+ ASSERT (hash_rehash (ht, 467));
+
+ /* Free an empty table. */
+ hash_clear (ht);
+ hash_free (ht);
+
+ ht = hash_initialize (53, NULL, hash_pjw, hash_compare_strings, NULL);
+ ASSERT (ht);
+
+ insert_new (ht, "z");
+ insert_new (ht, "y");
+ insert_new (ht, "x");
+ insert_new (ht, "w");
+ insert_new (ht, "v");
+ insert_new (ht, "u");
+
+ hash_clear (ht);
+ ASSERT (hash_get_n_entries (ht) == 0);
+ hash_free (ht);
+
+ /* Now, each entry is malloc'd. */
+ ht = hash_initialize (4651, NULL, hash_pjw, hash_compare_strings, hash_freer);
+ ASSERT (ht);
+ for (i = 0; i < 10000; i++)
+ {
+ unsigned int op = rand () % 10;
+ switch (op)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ {
+ char buf[50];
+ char const *p = uinttostr (i, buf);
+ insert_new (ht, xstrdup (p));
+ }
+ break;
+
+ case 6:
+ {
+ size_t n = hash_get_n_entries (ht);
+ ASSERT (hash_rehash (ht, n + rand () % 20));
+ }
+ break;
+
+ case 7:
+ {
+ size_t n = hash_get_n_entries (ht);
+ size_t delta = rand () % 20;
+ if (delta < n)
+ ASSERT (hash_rehash (ht, n - delta));
+ }
+ break;
+
+ case 8:
+ case 9:
+ {
+ /* Delete a random entry. */
+ size_t n = hash_get_n_entries (ht);
+ if (n)
+ {
+ size_t k = rand () % n;
+ void const *p;
+ void *v;
+ for (p = hash_get_first (ht); k; --k, p = hash_get_next (ht, p))
+ {
+ /* empty */
+ }
+ ASSERT (p);
+ v = hash_delete (ht, p);
+ ASSERT (v);
+ free (v);
+ }
+ break;
+ }
+ }
+ ASSERT (hash_table_ok (ht));
+ }
+
+ hash_free (ht);
+
+ hash_reset_tuning (&tuning);
+ tuning.shrink_threshold = 0.3;
+ tuning.shrink_factor = 0.707;
+ tuning.growth_threshold = 1.5;
+ tuning.growth_factor = 2.0;
+ tuning.is_n_buckets = true;
+ /* Invalid tuning. */
+ ht = hash_initialize (4651, &tuning, hash_pjw, hash_compare_strings,
+ hash_freer);
+ ASSERT (!ht);
+
+ /* Alternate tuning. */
+ tuning.growth_threshold = 0.89;
+ ht = hash_initialize (4651, &tuning, hash_pjw, hash_compare_strings,
+ hash_freer);
+ ASSERT (ht);
+ for (i = 0; i < 10000; i++)
+ {
+ unsigned int op = rand () % 10;
+ switch (op)
+ {
+ case 0:
+ case 1:
+ case 2:
+ case 3:
+ case 4:
+ case 5:
+ {
+ char buf[50];
+ char const *p = uinttostr (i, buf);
+ insert_new (ht, xstrdup (p));
+ }
+ break;
+
+ case 6:
+ {
+ size_t n = hash_get_n_entries (ht);
+ ASSERT (hash_rehash (ht, n + rand () % 20));
+ }
+ break;
+
+ case 7:
+ {
+ size_t n = hash_get_n_entries (ht);
+ size_t delta = rand () % 20;
+ if (delta < n)
+ ASSERT (hash_rehash (ht, n - delta));
+ }
+ break;
+
+ case 8:
+ case 9:
+ {
+ /* Delete a random entry. */
+ size_t n = hash_get_n_entries (ht);
+ if (n)
+ {
+ size_t k = rand () % n;
+ void const *p;
+ void *v;
+ for (p = hash_get_first (ht); k; --k, p = hash_get_next (ht, p))
+ {
+ /* empty */
+ }
+ ASSERT (p);
+ v = hash_delete (ht, p);
+ ASSERT (v);
+ free (v);
+ }
+ break;
+ }
+ }
+ ASSERT (hash_table_ok (ht));
+ }
+
+ hash_free (ht);
+
+ return 0;
+}
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