bird/lib/hash_test.c

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/*
* BIRD Library -- Hash Tests
*
* (c) 2015 CZ.NIC z.s.p.o.
*
* Can be freely distributed and used under the terms of the GNU GPL.
*/
#undef LOCAL_DEBUG
#include "test/birdtest.h"
#include "lib/hash.h"
struct test_node {
struct test_node *next; /* Hash chain */
u32 key;
};
#define TEST_KEY(n) n->key
#define TEST_NEXT(n) n->next
#define TEST_EQ(n1,n2) n1 == n2
#define TEST_FN(n) (n) ^ u32_hash((n))
#define TEST_ORDER 13
#define TEST_PARAMS /TEST_ORDER, *2, 2, 2, TEST_ORDER, 20
#define TEST_REHASH test_rehash
HASH_DEFINE_REHASH_FN(TEST, struct test_node);
HASH(struct test_node) hash;
struct pool *my_pool;
#define MAX_NUM (1 << TEST_ORDER)
struct test_node nodes[MAX_NUM];
static void
print_rate_of_fulfilment(void)
{
int i;
int num_stacked_items = 0;
for (i = 0; i < MAX_NUM; i++)
if (!hash.data[i])
num_stacked_items++;
double percent_stacked_items = ((double)num_stacked_items/(double)MAX_NUM)*100.;
bt_debug("%d (%.2f %%) chained of %d hashes \n", num_stacked_items, percent_stacked_items, MAX_NUM);
}
#ifdef LOCAL_DEBUG
static void
dump_nodes(void)
{
int i;
for (i = 0; i < MAX_NUM; i++)
bt_debug("nodes[%3d] is at address %14p has .key %3d, .next %14p \n", i, &nodes[i], nodes[i].key, nodes[i].next);
}
#endif
static void
init_hash_(uint order)
{
my_pool = rp_new(&root_pool, "Test pool");
HASH_INIT(hash, my_pool, order);
int i;
for (i = 0; i < MAX_NUM; i++)
{
nodes[i].key = i;
nodes[i].next = NULL;
}
bt_debug("MAX_NUM %d \n", MAX_NUM);
}
static void
init_hash(void)
{
init_hash_(TEST_ORDER);
}
static void
validate_filled_hash(void)
{
int i;
struct test_node *node;
for (i = 0; i < MAX_NUM; i++)
{
node = HASH_FIND(hash, TEST, nodes[i].key);
bt_assert_msg(node->key == nodes[i].key, "Hash should be filled, to find (%p) the node[%d] (%p) with .key = %u, .next %p", node, i, &nodes[i], nodes[i].key, nodes[i].next);
}
print_rate_of_fulfilment();
}
static void
validate_empty_hash(void)
{
int i;
struct test_node *node;
for (i = 0; i < MAX_NUM; i++)
{
node = HASH_FIND(hash, TEST, nodes[i].key);
bt_assert_msg(node == NULL, "Hash should be empty, to find (%p) the node[%d] (%p) with .key %u, .next %p", node, i, &nodes[i], nodes[i].key, nodes[i].next);
}
}
static void
fill_hash(void)
{
int i;
struct test_node *node;
for (i = 0; i < MAX_NUM; i++)
{
nodes[i].key = i;
node = &nodes[i];
HASH_INSERT(hash, TEST, node);
}
}
static int
t_insert_find(void)
{
init_hash();
fill_hash();
validate_filled_hash();
return 1;
}
static int
t_insert_find_random(void)
{
init_hash();
int i;
struct test_node *node;
for (i = 0; i < MAX_NUM; i++)
{
nodes[i].key = bt_random();
node = &nodes[i];
HASH_INSERT(hash, TEST, node);
}
validate_filled_hash();
return 1;
}
static int
t_insert2_find(void)
{
init_hash_(1);
int i;
struct test_node *node;
for (i = 0; i < MAX_NUM; i++)
{
nodes[i].key = i;
node = &nodes[i];
HASH_INSERT2(hash, TEST, my_pool, node);
}
bt_assert_msg(hash.order != 1, "The hash should auto-resize from order 2^1. The order of the hash is 2^%u.", hash.order);
validate_filled_hash();
return 1;
}
static int
t_walk(void)
{
init_hash();
fill_hash();
uint i;
uint check[MAX_NUM];
for (i = 0; i < MAX_NUM; i++)
check[i] = 0;
HASH_WALK(hash, next, n)
{
check[n->key]++;
}
HASH_WALK_END;
for (i = 0; i < MAX_NUM; i++)
bt_assert(check[i] == 1);
return 1;
}
static int
t_walk_delsafe_delete(void)
{
init_hash();
fill_hash();
HASH_WALK_DELSAFE(hash, next, n)
{
HASH_DELETE(hash, TEST, n->key);
}
HASH_WALK_DELSAFE_END;
validate_empty_hash();
return 1;
}
static int
t_walk_delsafe_remove(void)
{
init_hash();
fill_hash();
HASH_WALK_DELSAFE(hash, next, n)
{
HASH_REMOVE(hash, TEST, n);
}
HASH_WALK_DELSAFE_END;
validate_empty_hash();
return 1;
}
static int
t_walk_delsafe_delete2(void)
{
init_hash();
fill_hash();
HASH_WALK_DELSAFE(hash, next, n)
{
HASH_DELETE2(hash, TEST, my_pool, n->key);
}
HASH_WALK_DELSAFE_END;
validate_empty_hash();
return 1;
}
static int
t_walk_delsafe_remove2(void)
{
init_hash();
fill_hash();
HASH_WALK_DELSAFE(hash, next, n)
{
HASH_REMOVE2(hash, TEST, my_pool, n);
}
HASH_WALK_DELSAFE_END;
validate_empty_hash();
return 1;
}
static int
t_walk_filter(void)
{
init_hash();
fill_hash();
uint i;
uint check[MAX_NUM];
for (i = 0; i < MAX_NUM; i++)
check[i] = 0;
HASH_WALK_FILTER(hash, next, n, m)
{
bt_assert(n == *m);
check[n->key]++;
}
HASH_WALK_FILTER_END;
for (i = 0; i < MAX_NUM; i++)
bt_assert(check[i] == 1);
return 1;
}
int
main(int argc, char *argv[])
{
bt_init(argc, argv);
bt_test_suite(t_insert_find, "HASH_INSERT and HASH_FIND");
bt_test_suite(t_insert_find_random, "HASH_INSERT pseudo-random keys and HASH_FIND");
bt_test_suite(t_insert2_find, "HASH_INSERT2 and HASH_FIND. HASH_INSERT2 is HASH_INSERT and a smart auto-resize function");
bt_test_suite(t_walk, "HASH_WALK");
bt_test_suite(t_walk_delsafe_delete, "HASH_WALK_DELSAFE and HASH_DELETE");
bt_test_suite(t_walk_delsafe_delete2, "HASH_WALK_DELSAFE and HASH_DELETE2. HASH_DELETE2 is HASH_DELETE and smart auto-resize function");
bt_test_suite(t_walk_delsafe_remove, "HASH_WALK_DELSAFE and HASH_REMOVE");
bt_test_suite(t_walk_delsafe_remove2, "HASH_WALK_DELSAFE and HASH_REMOVE2. HASH_REMOVE2 is HASH_REMOVE and smart auto-resize function");
bt_test_suite(t_walk_filter, "HASH_WALK_FILTER");
return bt_exit_value();
}