123 lines
3.0 KiB
C
123 lines
3.0 KiB
C
#include "stringmap.h"
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#include "utils/math.h"
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#include "utils/stringmap.h"
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#include <stdint.h>
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#include <stdlib.h>
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StringMap* stringmap_new(void)
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{
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StringMap* map = malloc(sizeof(StringMap));
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stringmap_create(map);
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return map;
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}
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void stringmap_delete(StringMap* map) { free(map); }
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size_t* stringmap_get(const StringMap* map, const char* key, size_t key_length)
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{
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size_t key_hash
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= utils_string_hash_djb2((const unsigned char*)key, key_length);
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for (size_t i = 0; i < map->length; ++i)
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if (map->data[i].key_hash == key_hash && !map->data[i].deleted)
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return &map->data[i].value;
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return NULL;
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}
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bool stringmap_has(const StringMap* map, const char* key, size_t key_length)
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{
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size_t key_hash
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= utils_string_hash_djb2((const unsigned char*)key, key_length);
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for (size_t i = 0; i < map->length; ++i)
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if (map->data[i].key_hash == key_hash && !map->data[i].deleted)
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return true;
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return false;
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}
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void stringmap_set(
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StringMap* map, const char* key, size_t key_length, size_t value
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)
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{
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size_t key_hash
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= utils_string_hash_djb2((const unsigned char*)key, key_length);
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for (size_t i = 0; i < map->length; ++i) {
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if (map->data[i].key_hash == key_hash && !map->data[i].deleted) {
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map->data[i].value = value;
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return;
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}
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}
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if (map->data == NULL) {
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map->capacity = 8;
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map->data = malloc(sizeof(StringMapEntry) * map->capacity);
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} else if (map->length == map->capacity) {
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map->capacity *= 2;
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map->data = realloc(map->data, sizeof(StringMapEntry) * map->capacity);
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}
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map->data[map->length] = (StringMapEntry) {
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.deleted = false,
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.key_hash = key_hash,
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.value = value,
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};
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map->length++;
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}
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void stringmap_reserve(StringMap* map, size_t minimum_size)
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{
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if (map->capacity >= minimum_size)
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return;
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map->capacity = utils_nearest_bigger_power_of_2_u64(minimum_size);
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map->data = realloc(map->data, sizeof(StringMapEntry) * map->capacity);
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}
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void stringmap_remove(StringMap* map, const char* key, size_t key_length)
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{
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size_t key_hash
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= utils_string_hash_djb2((const unsigned char*)key, key_length);
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for (size_t i = 0; i < map->length; ++i) {
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if (map->data[i].key_hash == key_hash && !map->data[i].deleted) {
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map->data[i].deleted = true;
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}
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}
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}
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void stringmap_clean(StringMap* map)
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{
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size_t shift_amount = 0;
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for (size_t i = 0; i < map->length; ++i) {
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map->data[i - shift_amount] = map->data[i];
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if (map->data[i].deleted)
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shift_amount++;
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}
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}
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void stringmap_shrink(StringMap* map)
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{
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size_t new_size = utils_nearest_bigger_power_of_2_u64(map->length);
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if (new_size >= map->capacity)
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return;
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map->capacity = new_size;
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map->data = realloc(map->data, sizeof(StringMapEntry) * map->capacity);
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}
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void stringmap_clean_and_shrink(StringMap* map)
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{
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stringmap_clean(map);
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stringmap_shrink(map);
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}
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size_t stringmap_length(StringMap* map) { return map->length; }
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void stringmap_create(StringMap* map)
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{
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*map = (StringMap) {
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.data = NULL,
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.length = 0,
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.capacity = 0,
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};
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}
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void stringmap_destroy(StringMap* map)
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{
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if (map->data)
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free(map->data);
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}
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