-/* PSPP - computes sample statistics.
- Copyright (C) 2007 Free Software Foundation, Inc.
+/* PSPP - a program for statistical analysis.
+ Copyright (C) 2007, 2010 Free Software Foundation, Inc.
- 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 2 of the
- License, or (at your option) any later version.
+ 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.
+ 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, write to the Free Software
- Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
- 02110-1301, USA. */
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
/* This is a test program for the bt_* routines defined in bt.c.
This test program aims to be as comprehensive as possible.
#include <libpspp/bt.h>
-#include <assert.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <libpspp/compiler.h>
\f
-/* Currently running test. */
-static const char *test_name;
-
/* Exit with a failure code.
(Place a breakpoint on this function while debugging.) */
static void
-check_die (void)
+check_die (void)
{
- exit (EXIT_FAILURE);
+ exit (EXIT_FAILURE);
}
/* If OK is not true, prints a message about failure on the
current source file and the given LINE and terminates. */
static void
-check_func (bool ok, int line)
+check_func (bool ok, int line)
{
- if (!ok)
+ if (!ok)
{
- printf ("Check failed in %s test at %s, line %d\n",
- test_name, __FILE__, line);
+ fprintf (stderr, "%s:%d: check failed\n", __FILE__, line);
check_die ();
}
}
/* Allocates and returns N bytes of memory. */
static void *
-xmalloc (size_t n)
+xmalloc (size_t n)
{
- if (n != 0)
+ if (n != 0)
{
void *p = malloc (n);
if (p == NULL)
}
static void *
-xmemdup (const void *p, size_t n)
+xmemdup (const void *p, size_t n)
{
void *q = xmalloc (n);
memcpy (q, p, n);
/* Allocates and returns N * M bytes of memory. */
static void *
-xnmalloc (size_t n, size_t m)
+xnmalloc (size_t n, size_t m)
{
if ((size_t) -1 / m <= n)
xalloc_die ();
static struct element *
bt_node_to_element (const struct bt_node *node)
{
- return bt_data (node, struct element, node);
+ return BT_DATA (node, struct element, node);
}
/* Compares the `x' values in A and B and returns a strcmp-type
return value. Verifies that AUX points to aux_data. */
static int
compare_elements (const struct bt_node *a_, const struct bt_node *b_,
- const void *aux)
+ const void *aux)
{
const struct element *a = bt_node_to_element (a_);
const struct element *b = bt_node_to_element (b_);
/* Compares A and B and returns a strcmp-type return value. */
static int
-compare_ints_noaux (const void *a_, const void *b_)
+compare_ints_noaux (const void *a_, const void *b_)
{
const int *a = a_;
const int *b = b_;
/* Swaps *A and *B. */
static void
-swap (int *a, int *b)
+swap (int *a, int *b)
{
int t = *a;
*a = *b;
if (cnt > 0)
{
size_t i = cnt - 1;
- while (i != 0)
+ while (i != 0)
{
i--;
if (values[i] < values[i + 1])
swap (values + i, values + j);
reverse (values + (i + 1), cnt - (i + 1));
return true;
- }
+ }
}
-
+
reverse (values, cnt);
}
-
+
return false;
}
/* Returns N!. */
static unsigned int
-factorial (unsigned int n)
+factorial (unsigned int n)
{
unsigned int value = 1;
while (n > 1)
char *tmp = xmalloc (size);
size_t i;
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
{
size_t j = rand () % (cnt - i) + i;
- if (i != j)
+ if (i != j)
{
memcpy (tmp, array + j * size, size);
memcpy (array + j * size, array + i * size, size);
/* Calculates floor(log(n)/log(sqrt(2))). */
static int
-calculate_h_alpha (size_t n)
+calculate_h_alpha (size_t n)
{
- size_t thresholds[] =
+ size_t thresholds[] =
{
0, 2, 2, 3, 4, 6, 8, 12, 16, 23, 32, 46, 64, 91, 128, 182, 256, 363,
512, 725, 1024, 1449, 2048, 2897, 4096, 5793, 8192, 11586, 16384,
94906266, 134217728, 189812532, 268435456, 379625063, 536870912,
759250125, 1073741824, 1518500250, 2147483648, 3037000500,
};
- size_t threshold_cnt = sizeof thresholds / sizeof *thresholds;
+ size_t n_thresholds = sizeof thresholds / sizeof *thresholds;
size_t i;
- for (i = 0; i < threshold_cnt; i++)
+ for (i = 0; i < n_thresholds; i++)
if (thresholds[i] > n)
break;
return i - 1;
/* Returns the height of the tree rooted at NODE. */
static int
-get_height (struct bt_node *node)
+get_height (struct bt_node *node)
{
if (node == NULL)
return 0;
- else
+ else
{
int left = get_height (node->down[0]);
int right = get_height (node->down[1]);
its height is no more than h_alpha(count) + 1, where
h_alpha(n) = floor(log(n)/log(1/alpha)). */
static void
-check_balance (struct bt *bt)
+check_balance (struct bt *bt)
{
/* In the notation of the Galperin and Rivest paper (and of
CLR), the height of a tree is the number of edges in the
structure is correct, and that certain operations on BT
produce the expected results. */
static void
-check_bt (struct bt *bt, const int data[], size_t cnt)
+check_bt (struct bt *bt, const int data[], size_t cnt)
{
struct element e;
size_t i;
check_balance (bt);
- if (cnt == 0)
+ if (cnt == 0)
{
check (bt_first (bt) == NULL);
check (bt_last (bt) == NULL);
check (bt_next (bt, NULL) == NULL);
check (bt_prev (bt, NULL) == NULL);
}
- else
+ else
{
struct bt_node *p;
-
+
for (p = bt_first (bt), i = 0; i < cnt; p = bt_next (bt, p), i++)
check (bt_node_to_element (p)->data == order[i]);
check (p == NULL);
static void
test_insert_delete (const int insertions[],
const int deletions[],
- size_t cnt)
+ size_t cnt)
{
struct element *elements;
struct bt bt;
size_t i;
-
+
elements = xnmalloc (cnt, sizeof *elements);
for (i = 0; i < cnt; i++)
elements[i].data = i;
removes them in each possible order, up to a specified maximum
size. */
static void
-test_insert_any_remove_any (void)
+test_insert_any_remove_any (void)
{
const int max_elems = 5;
int cnt;
- for (cnt = 0; cnt <= max_elems; cnt++)
+ for (cnt = 0; cnt <= max_elems; cnt++)
{
int *insertions, *deletions;
- unsigned int ins_perm_cnt;
+ unsigned int ins_n_perms;
int i;
insertions = xnmalloc (cnt, sizeof *insertions);
deletions = xnmalloc (cnt, sizeof *deletions);
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
insertions[i] = i;
- for (ins_perm_cnt = 0;
- ins_perm_cnt == 0 || next_permutation (insertions, cnt);
- ins_perm_cnt++)
+ for (ins_n_perms = 0;
+ ins_n_perms == 0 || next_permutation (insertions, cnt);
+ ins_n_perms++)
{
- unsigned int del_perm_cnt;
+ unsigned int del_n_perms;
int i;
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
deletions[i] = i;
- for (del_perm_cnt = 0;
- del_perm_cnt == 0 || next_permutation (deletions, cnt);
- del_perm_cnt++)
+ for (del_n_perms = 0;
+ del_n_perms == 0 || next_permutation (deletions, cnt);
+ del_n_perms++)
test_insert_delete (insertions, deletions, cnt);
- check (del_perm_cnt == factorial (cnt));
+ check (del_n_perms == factorial (cnt));
}
- check (ins_perm_cnt == factorial (cnt));
+ check (ins_n_perms == factorial (cnt));
free (insertions);
free (deletions);
removes them in the same order, up to a specified maximum
size. */
static void
-test_insert_any_remove_same (void)
+test_insert_any_remove_same (void)
{
const int max_elems = 7;
int cnt;
- for (cnt = 0; cnt <= max_elems; cnt++)
+ for (cnt = 0; cnt <= max_elems; cnt++)
{
int *values;
- unsigned int permutation_cnt;
+ unsigned int n_permutations;
int i;
values = xnmalloc (cnt, sizeof *values);
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
values[i] = i;
- for (permutation_cnt = 0;
- permutation_cnt == 0 || next_permutation (values, cnt);
- permutation_cnt++)
+ for (n_permutations = 0;
+ n_permutations == 0 || next_permutation (values, cnt);
+ n_permutations++)
test_insert_delete (values, values, cnt);
- check (permutation_cnt == factorial (cnt));
+ check (n_permutations == factorial (cnt));
free (values);
}
removes them in reverse order, up to a specified maximum
size. */
static void
-test_insert_any_remove_reverse (void)
+test_insert_any_remove_reverse (void)
{
const int max_elems = 7;
int cnt;
- for (cnt = 0; cnt <= max_elems; cnt++)
+ for (cnt = 0; cnt <= max_elems; cnt++)
{
int *insertions, *deletions;
- unsigned int permutation_cnt;
+ unsigned int n_permutations;
int i;
insertions = xnmalloc (cnt, sizeof *insertions);
deletions = xnmalloc (cnt, sizeof *deletions);
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
insertions[i] = i;
- for (permutation_cnt = 0;
- permutation_cnt == 0 || next_permutation (insertions, cnt);
- permutation_cnt++)
+ for (n_permutations = 0;
+ n_permutations == 0 || next_permutation (insertions, cnt);
+ n_permutations++)
{
memcpy (deletions, insertions, sizeof *insertions * cnt);
reverse (deletions, cnt);
-
- test_insert_delete (insertions, deletions, cnt);
+
+ test_insert_delete (insertions, deletions, cnt);
}
- check (permutation_cnt == factorial (cnt));
+ check (n_permutations == factorial (cnt));
free (insertions);
free (deletions);
/* Inserts and removes values in an BT in random orders. */
static void
-test_random_sequence (void)
+test_random_sequence (void)
{
const int max_elems = 128;
const int max_trials = 8;
int cnt;
- for (cnt = 0; cnt <= max_elems; cnt += 2)
+ for (cnt = 0; cnt <= max_elems; cnt += 2)
{
int *insertions, *deletions;
int trial;
insertions = xnmalloc (cnt, sizeof *insertions);
deletions = xnmalloc (cnt, sizeof *deletions);
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
insertions[i] = i;
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
deletions[i] = i;
- for (trial = 0; trial < max_trials; trial++)
+ for (trial = 0; trial < max_trials; trial++)
{
random_shuffle (insertions, cnt, sizeof *insertions);
random_shuffle (deletions, cnt, sizeof *deletions);
-
- test_insert_delete (insertions, deletions, cnt);
+
+ test_insert_delete (insertions, deletions, cnt);
}
free (insertions);
/* Inserts elements into an BT in ascending order. */
static void
-test_insert_ordered (void)
+test_insert_ordered (void)
{
const int max_elems = 1024;
struct element *elements;
bt_init (&bt, compare_elements, &aux_data);
elements = xnmalloc (max_elems, sizeof *elements);
values = xnmalloc (max_elems, sizeof *values);
- for (i = 0; i < max_elems; i++)
+ for (i = 0; i < max_elems; i++)
{
values[i] = elements[i].data = i;
check (bt_insert (&bt, &elements[i].node) == NULL);
/* Tests bt_find_ge and bt_find_le. */
static void
-test_find_ge_le (void)
+test_find_ge_le (void)
{
const int max_elems = 10;
struct element *elements;
elements = xnmalloc (max_elems, sizeof *elements);
values = xnmalloc (max_elems, sizeof *values);
- for (inc_pat = 0; inc_pat < (1u << max_elems); inc_pat++)
+ for (inc_pat = 0; inc_pat < (1u << max_elems); inc_pat++)
{
struct bt bt;
- int elem_cnt = 0;
+ int n_elems = 0;
int i;
/* Insert the values in the pattern into BT. */
bt_init (&bt, compare_elements, &aux_data);
for (i = 0; i < max_elems; i++)
- if (inc_pat & (1u << i))
+ if (inc_pat & (1u << i))
{
- values[elem_cnt] = elements[elem_cnt].data = i;
- check (bt_insert (&bt, &elements[elem_cnt].node) == NULL);
- elem_cnt++;
+ values[n_elems] = elements[n_elems].data = i;
+ check (bt_insert (&bt, &elements[n_elems].node) == NULL);
+ n_elems++;
}
- check_bt (&bt, values, elem_cnt);
+ check_bt (&bt, values, n_elems);
/* Try find_ge and find_le for each possible element value. */
- for (i = -1; i <= max_elems; i++)
+ for (i = -1; i <= max_elems; i++)
{
struct element tmp;
struct bt_node *ge, *le;
int j;
-
+
ge = le = NULL;
- for (j = 0; j < elem_cnt; j++)
+ for (j = 0; j < n_elems; j++)
{
if (ge == NULL && values[j] >= i)
ge = &elements[j].node;
/* Inserts elements into an BT, then moves the nodes around in
memory. */
static void
-test_moved (void)
+test_moved (void)
{
const int max_elems = 128;
struct element *e[2];
e[1] = xnmalloc (max_elems, sizeof *e[1]);
values = xnmalloc (max_elems, sizeof *values);
cur = 0;
- for (i = 0; i < max_elems; i++)
+ for (i = 0; i < max_elems; i++)
{
values[i] = e[cur][i].data = i;
check (bt_insert (&bt, &e[cur][i].node) == NULL);
check_bt (&bt, values, i + 1);
- for (j = 0; j <= i; j++)
+ for (j = 0; j <= i; j++)
{
e[!cur][j] = e[cur][j];
bt_moved (&bt, &e[!cur][j].node);
const int max_elems = 6;
int cnt;
- for (cnt = 0; cnt <= max_elems; cnt++)
+ for (cnt = 0; cnt <= max_elems; cnt++)
{
int *values, *changed_values;
struct element *elements;
- unsigned int permutation_cnt;
+ unsigned int n_permutations;
int i;
values = xnmalloc (cnt, sizeof *values);
changed_values = xnmalloc (cnt, sizeof *changed_values);
elements = xnmalloc (cnt, sizeof *elements);
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
values[i] = i;
- for (permutation_cnt = 0;
- permutation_cnt == 0 || next_permutation (values, cnt);
- permutation_cnt++)
+ for (n_permutations = 0;
+ n_permutations == 0 || next_permutation (values, cnt);
+ n_permutations++)
{
- for (i = 0; i < cnt; i++)
+ for (i = 0; i < cnt; i++)
{
int j, k;
- for (j = 0; j <= cnt; j++)
+ for (j = 0; j <= cnt; j++)
{
struct bt bt;
struct bt_node *changed_retval;
bt_init (&bt, compare_elements, &aux_data);
/* Add to BT in order. */
- for (k = 0; k < cnt; k++)
+ for (k = 0; k < cnt; k++)
{
int n = values[k];
elements[n].data = n;
- check (bt_insert (&bt, &elements[n].node) == NULL);
+ check (bt_insert (&bt, &elements[n].node) == NULL);
}
check_bt (&bt, values, cnt);
check_bt (&bt, changed_values, cnt);
}
}
- }
+ }
}
- check (permutation_cnt == factorial (cnt));
+ check (n_permutations == factorial (cnt));
free (values);
free (changed_values);
\f
/* Main program. */
-/* Runs TEST_FUNCTION and prints a message about NAME. */
-static void
-run_test (void (*test_function) (void), const char *name)
-{
- test_name = name;
- putchar ('.');
- fflush (stdout);
- test_function ();
-}
+struct test
+ {
+ const char *name;
+ const char *description;
+ void (*function) (void);
+ };
+
+static const struct test tests[] =
+ {
+ {
+ "insert-any-remove-any",
+ "insert any order, delete any order",
+ test_insert_any_remove_any
+ },
+ {
+ "insert-any-remove-same",
+ "insert any order, delete same order",
+ test_insert_any_remove_same
+ },
+ {
+ "insert-any-remove-reverse",
+ "insert any order, delete reverse order",
+ test_insert_any_remove_reverse
+ },
+ {
+ "random-sequence",
+ "insert and delete in random sequence",
+ test_random_sequence
+ },
+ {
+ "insert-ordered",
+ "insert in ascending order",
+ test_insert_ordered
+ },
+ {
+ "find-ge-le",
+ "find_ge and find_le",
+ test_find_ge_le
+ },
+ {
+ "moved",
+ "move elements around in memory",
+ test_moved
+ },
+ {
+ "changed",
+ "change key data in nodes",
+ test_changed
+ }
+ };
+
+enum { N_TESTS = sizeof tests / sizeof *tests };
int
-main (void)
+main (int argc, char *argv[])
{
- run_test (test_insert_any_remove_any,
- "insert any order, delete any order");
- run_test (test_insert_any_remove_same,
- "insert any order, delete same order");
- run_test (test_insert_any_remove_reverse,
- "insert any order, delete reverse order");
- run_test (test_random_sequence,
- "insert and delete in random sequence");
- run_test (test_insert_ordered,
- "insert in ascending order");
- run_test (test_find_ge_le, "find_ge and find_le");
- run_test (test_moved, "move elements around in memory");
- run_test (test_changed, "change key data in nodes");
- putchar ('\n');
-
- return 0;
+ int i;
+
+ if (argc != 2)
+ {
+ fprintf (stderr, "exactly one argument required; use --help for help\n");
+ return EXIT_FAILURE;
+ }
+ else if (!strcmp (argv[1], "--help"))
+ {
+ printf ("%s: test balanced tree\n"
+ "usage: %s TEST-NAME\n"
+ "where TEST-NAME is one of the following:\n",
+ argv[0], argv[0]);
+ for (i = 0; i < N_TESTS; i++)
+ printf (" %s\n %s\n", tests[i].name, tests[i].description);
+ return 0;
+ }
+ else
+ {
+ for (i = 0; i < N_TESTS; i++)
+ if (!strcmp (argv[1], tests[i].name))
+ {
+ tests[i].function ();
+ return 0;
+ }
+
+ fprintf (stderr, "unknown test %s; use --help for help\n", argv[1]);
+ return EXIT_FAILURE;
+ }
}
projects / pspp / blobdiff