Muldersoft/LibHashSet
Muldersoft/LibHashSet
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Various improvements.

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This commit is contained in:
LoRd_MuldeR 2022-11-22 23:30:57 +01:00
parent 9cd9ef3600
commit caef45b177
2 changed files with 198 additions and 72 deletions
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214
hashset/src/main.c
View File

@ -3,41 +3,75 @@
/* This work has been released under the CC0 1.0 Universal license! */
/******************************************************************************/
#define _CRT_RAND_S 1
#include "hash_set.h"
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <string.h>
#include "hash_set.h"
#ifndef _WIN32
# include <unistd.h>
#endif
static uint64_t next_rand(void)
#if defined(__GNUC__)
# define INLINE __inline__
#elif defined(_MSC_VER)
# define INLINE __inline
#else
# define INLINE
#endif
/* ========================================================================= */
/* Utilities */
/* ========================================================================= */
#define ARRAY_SIZE(X) (sizeof(X) / sizeof((X)[0U]))
#ifdef _WIN32
unsigned char __stdcall SystemFunction036(void *buffer, unsigned long length);
static int getentropy(void* const buffer, const size_t length)
{
uint32_t a, b;
if (rand_s(&a) || rand_s(&b))
return SystemFunction036(buffer, (unsigned long)length) ? 0 : (-1);
}
#endif
static INLINE uint64_t random_uint64(void)
{
static size_t offset = SIZE_MAX;
static uint64_t buffer[16U];
if (offset >= ARRAY_SIZE(buffer))
{
offset = 0U;
if (getentropy(&buffer, sizeof(buffer)) < 0)
{
abort();
}
return (((uint64_t)a) << 32) | b;
}
#define MAXIMUM 393216U
int main()
{
uint64_t rnd;
size_t capacity, valid, deleted, limit;
uint8_t spinner;
clock_t last_update;
hash_set_t *const hash_set = hash_set_create(0U, -1.0, HASHSET_OPT_FAILFAST);
if (!hash_set)
{
puts("Allocation has failed!");
return EXIT_FAILURE;
}
for (size_t r = 0U; r < 5U; ++r)
return buffer[offset++];
}
#define PRINT_SET_INFO() do \
{\
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit)) \
{ \
printf("capacity: %010zu, valid: %010zu, deleted: %010zu, limit: %010zu\n", capacity, valid, deleted, limit); \
} \
} \
while(0)
/* ========================================================================= */
/* TEST #1 */
/* ========================================================================= */
#define MAXIMUM 425984U
static int test_function_1(hash_set_t *const hash_set)
{
size_t capacity, valid, deleted, limit;
for (size_t r = 0U; r < 3U; ++r)
{
for (uint64_t i = 0; i < MAXIMUM; ++i)
{
@ -50,10 +84,7 @@ int main()
return EXIT_FAILURE;
}
}
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit))
{
printf("%010zu, %010zu, %010zu, %010zu\n", capacity, valid, deleted, limit);
}
PRINT_SET_INFO();
}
if (hash_set_size(hash_set) != MAXIMUM - 4U)
@ -102,10 +133,7 @@ int main()
return EXIT_FAILURE;
}
}
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit))
{
printf("%010zu, %010zu, %010zu, %010zu\n", capacity, valid, deleted, limit);
}
PRINT_SET_INFO();
}
if (hash_set_size(hash_set) != 1U)
@ -142,20 +170,27 @@ int main()
return EXIT_FAILURE;
}
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit))
{
printf("%010zu, %010zu, %010zu, %010zu\n", capacity, valid, deleted, limit);
PRINT_SET_INFO();
puts("--------");
}
puts("-----");
}
return EXIT_SUCCESS;
}
spinner = 0U;
last_update = clock();
/* ========================================================================= */
/* TEST #2 */
/* ========================================================================= */
static int test_function_2(hash_set_t *const hash_set)
{
size_t capacity, valid, deleted, limit;
uint8_t spinner = 0U;
clock_t last_update = clock();
for (;;)
{
const errno_t error = hash_set_insert(hash_set, rnd = next_rand() & 0x3FFFFFFFFFFFFFFllu);
const uint64_t rnd = random_uint64() & UINT64_C(0x3FFFFFFFFFFFFFF);
const errno_t error = hash_set_insert(hash_set, rnd);
if (error)
{
if (error != EEXIST)
@ -165,31 +200,112 @@ int main()
}
else
{
PRINT_SET_INFO();
printf("Collision detected! [%016llX]\n", rnd);
break;
}
}
if (!(++spinner & 0x7F))
{
const clock_t now = clock();
if ((now < last_update) || (now >= last_update + CLOCKS_PER_SEC))
const clock_t clock_now = clock();
if ((clock_now < last_update) || (clock_now >= last_update + CLOCKS_PER_SEC))
{
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit))
{
printf("%010zu, %010zu, %010zu, %010zu\n", capacity, valid, deleted, limit);
}
last_update = now;
PRINT_SET_INFO();
last_update = clock_now;
}
}
}
if (!hash_set_info(hash_set, &capacity, &valid, &deleted, &limit))
PRINT_SET_INFO();
if (hash_set_clear(hash_set))
{
printf("%010zu, %010zu, %010zu, %010zu\n", capacity, valid, deleted, limit);
puts("Clear operation has failed!");
return EXIT_FAILURE;
}
if (hash_set_shrink(hash_set))
{
puts("Shrink operation has failed!");
return EXIT_FAILURE;
}
PRINT_SET_INFO();
puts("--------");
return EXIT_SUCCESS;
}
/* ========================================================================= */
/* TEST #3 */
/* ========================================================================= */
static int test_function_3(hash_set_t *const hash_set)
{
size_t capacity, valid, deleted, limit;
uint8_t spinner = 0U;
clock_t last_update = clock();
for (uint64_t value = 0U; value < ((uint64_t)INT32_MAX); ++value)
{
const errno_t error = hash_set_insert(hash_set, value);
if (error)
{
PRINT_SET_INFO();
printf("Insert operation has failed! (error: %d)\n", error);
return EXIT_FAILURE;
}
if (!(++spinner & 0x7F))
{
const clock_t clock_now = clock();
if ((clock_now < last_update) || (clock_now >= last_update + CLOCKS_PER_SEC))
{
PRINT_SET_INFO();
last_update = clock_now;
}
}
}
PRINT_SET_INFO();
puts("--------");
return EXIT_SUCCESS;
}
/* ========================================================================= */
/* MAIN */
/* ========================================================================= */
int main()
{
hash_set_t *const hash_set = hash_set_create(0U, -1.0, 0U /*HASHSET_OPT_FAILFAST*/);
if (!hash_set)
{
puts("Allocation has failed!");
return EXIT_FAILURE;
}
if (test_function_1(hash_set) != EXIT_SUCCESS)
{
goto failure;
}
if (test_function_2(hash_set) != EXIT_SUCCESS)
{
goto failure;
}
if (test_function_3(hash_set) != EXIT_SUCCESS)
{
goto failure;
}
hash_set_destroy(hash_set);
puts("Test completed successfully.");
return EXIT_SUCCESS;
failure:
hash_set_destroy(hash_set);
puts("Something went wrong !!!");
return EXIT_FAILURE;
}

58
libhashset/src/hash_set.c
View File

@ -8,6 +8,7 @@
/* CRT */
#include <string.h>
#include <errno.h>
#include <float.h>
typedef int bool_t;
#define TRUE 1
@ -40,6 +41,7 @@ struct _hash_set
static const size_t MINIMUM_CAPACITY = 128U;
static const size_t DEFAULT_CAPACITY = 16384U;
static const double DEFAULT_LOADFCTR = 0.8125;
/* ========================================================================= */
/* PRIVATE FUNCTIONS */
@ -55,6 +57,12 @@ static const size_t DEFAULT_CAPACITY = 16384U;
/* Math */
/* ------------------------------------------------- */
static FORCE_INLINE size_t safe_mult(const size_t a, const size_t b)
{
const size_t result = a * b;
return ((a == 0U) || (result / a == b)) ? result : SIZE_MAX;
}
static FORCE_INLINE size_t div_ceil(const size_t value, const size_t divisor)
{
return (value / divisor) + ((value % divisor != 0U) ? 1U : 0U);
@ -65,11 +73,6 @@ static FORCE_INLINE size_t round_sz(double d)
return (d >= 0.0) ? ((d + 0.5 >= ((double)SIZE_MAX)) ? SIZE_MAX : ((size_t)(d + 0.5))) : 0U;
}
static FORCE_INLINE size_t safe_mult2(const size_t value)
{
return (value < (SIZE_MAX >> 1)) ? (value << 1) : SIZE_MAX;
}
static FORCE_INLINE size_t safe_add(const size_t a, const size_t b)
{
return ((SIZE_MAX - a) > b) ? (a + b) : SIZE_MAX;
@ -91,7 +94,7 @@ static FORCE_INLINE size_t next_pow2(const size_t target)
while (result < target)
{
result = safe_mult2(result);
result = safe_mult(result, 2U);
}
return result;
@ -101,19 +104,21 @@ static FORCE_INLINE size_t next_pow2(const size_t target)
/* Hash function */
/* ------------------------------------------------- */
#define HASH_OFFSET UINT64_C(14695981039346656037)
#define INDEX(X,Y) ((size_t)((X) % (Y)))
static FORCE_INLINE uint64_t hash_compute(uint64_t hash, uint64_t value)
static FORCE_INLINE void hash_update(uint64_t *const hash, uint64_t value)
{
do
{
hash ^= value & 0xFF;
hash *= UINT64_C(1099511628211);
*hash ^= value & 0xFF;
*hash *= UINT64_C(1099511628211);
}
while (value >>= CHAR_BIT);
}
static INLINE uint64_t hash_compute(const uint64_t i, const uint64_t value)
{
uint64_t hash = UINT64_C(14695981039346656037);
hash_update(&hash, i);
hash_update(&hash, value);
return hash;
}
@ -121,9 +126,14 @@ static FORCE_INLINE uint64_t hash_compute(uint64_t hash, uint64_t value)
/* Allocation */
/* ------------------------------------------------- */
static INLINE void zero_memory(void* const addr, const size_t count, const size_t size)
{
memset(addr, 0, safe_mult(count, size));
}
static INLINE bool_t alloc_data(struct _hash_set_data *const data, const size_t capacity)
{
memset(data, 0, sizeof(struct _hash_set_data));
zero_memory(data, 1U, sizeof(struct _hash_set_data));
data->values = (uint64_t*) calloc(capacity, sizeof(uint64_t));
if (!data->values)
@ -184,15 +194,15 @@ static INLINE void clear_flag(uint8_t* const flags, const size_t index)
/* Set functions */
/* ------------------------------------------------- */
#define INDEX(X) ((size_t)((X) % data->capacity))
static INLINE bool_t find_slot(const struct _hash_set_data *const data, const uint64_t value, size_t *const index_out)
{
uint64_t loop = 0U;
size_t index;
bool_t index_saved = FALSE;
uint64_t tweak = 0U;
const uint64_t hash = hash_compute(HASH_OFFSET, value);
for (index = INDEX(hash, data->capacity); get_flag(data->used, index); index = INDEX(hash_compute(hash, tweak++), data->capacity))
for (index = INDEX(hash_compute(loop, value)); get_flag(data->used, index); index = INDEX(hash_compute(++loop, value)))
{
if (!get_flag(data->deleted, index))
{
@ -295,7 +305,7 @@ hash_set_t *hash_set_create(const size_t initial_capacity, const double load_fac
return NULL;
}
instance->load_factor = (load_factor > 0.0) ? BOUND(0.125, load_factor, 1.0) : 0.8;
instance->load_factor = (load_factor > DBL_EPSILON) ? BOUND(0.125, load_factor, 1.0) : DEFAULT_LOADFCTR;
instance->options = options;
instance->limit = round_sz(instance->data.capacity * instance->load_factor);
@ -307,7 +317,7 @@ void hash_set_destroy(hash_set_t *instance)
if (instance)
{
free_data(&instance->data);
memset(instance, 0, sizeof(hash_set_t));
zero_memory(instance, 1U, sizeof(hash_set_t));
SAFE_FREE(instance);
}
}
@ -344,7 +354,7 @@ errno_t hash_set_insert(hash_set_t *const instance, const uint64_t value)
}
else
{
const errno_t error = rebuild_set(instance, safe_mult2(instance->data.capacity));
const errno_t error = rebuild_set(instance, safe_mult(instance->data.capacity, 2U));
if (error)
{
if (error == ENOMEM)
@ -414,10 +424,10 @@ errno_t hash_set_clear(hash_set_t *const instance)
return EAGAIN;
}
memset(instance->data.used, 0, sizeof(uint8_t) * div_ceil(instance->data.capacity, 8U));
memset(instance->data.deleted, 0, sizeof(uint8_t) * div_ceil(instance->data.capacity, 8U));
instance->valid = instance->deleted = 0U;
zero_memory(instance->data.used, div_ceil(instance->data.capacity, 8U), sizeof(uint8_t));
zero_memory(instance->data.deleted, div_ceil(instance->data.capacity, 8U), sizeof(uint8_t));
instance->valid = instance->deleted = 0U;
return 0;
}