91 lines
2.2 KiB
C
91 lines
2.2 KiB
C
#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include "../../hashmap/myhashmap.h"
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#define MAX_STR_LEN 64
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/* My custom data type stored as value */
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struct my_custom_type {
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int age;
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char favourite_brand[MAX_STR_LEN];
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};
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/* Let's hash our name */
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static unsigned int my_hash_func(const void *key) {
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char *name = (char *)key;
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size_t len = strlen(name);
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unsigned int hash = 0;
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for (size_t i = 0; i < len; ++i) {
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hash += (int)name[i];
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}
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return hash % 2069;
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}
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/* Let's write our compare function */
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bool my_equal_fun(const void *key_a, const void *key_b) {
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char *name_a = (char *)key_a;
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char *name_b = (char *)key_b;
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if (strcmp(name_a, name_b) == 0) {
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return true;
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}
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return false;
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}
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/* And our last two functions, the free key and value called inside mcl_hm_remove() */
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void my_free_key(void *key) { free(key); }
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void my_free_value(void *value) {
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struct my_custom_type *mct = (struct my_custom_type *)value;
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free(mct);
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}
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void test_hm1(void) {
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/* Allocate a new hashmap */
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/* Pass your custom hash, equal and free functions */
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/* This hashmap will contain names as keys and a custom type as value */
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size_t key_size = sizeof(char) * MAX_STR_LEN;
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size_t value_size = sizeof(int) + sizeof(char) * MAX_STR_LEN;
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hashmap_s *map = hm_new(my_hash_func, my_equal_fun, my_free_key, my_free_value, key_size, value_size);
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assert(map != NULL);
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/* Make a new value */
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struct my_custom_type p1 = {
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.age = 21,
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};
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strncpy(p1.favourite_brand, "Ferrari", sizeof(p1.favourite_brand));
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/* Insert a new pair */
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assert(hm_set(map, "John", &p1));
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/* Retrieve the data */
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/* Remember to free the value from the get function */
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bucket_s *john = hm_get(map, "John");
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assert(john != NULL);
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char *name = (char *)john->key;
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struct my_custom_type *john_v = (struct my_custom_type *)john->value;
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int age = john_v->age;
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char *fav_brand = john_v->favourite_brand;
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assert(strcmp(name, "John") == 0);
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assert(age == 21);
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assert(strcmp(fav_brand, "Ferrari") == 0);
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/* Free the bucket */
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hm_free_bucket(john);
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/* Remove a key from hash map */
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assert(hm_remove(map, "John"));
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/* Deallocate */
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hm_free(map);
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}
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