72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
#ifndef HASHTABLE_H
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#define HASHTABLE_H
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#include <stdlib.h>
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#include <string.h>
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// entry in the hashtable
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typedef struct entry
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{
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const char *key;
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void *value;
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struct entry *next;
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} entry;
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// hashtable
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typedef struct
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{
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int size;
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entry **table;
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} hashtable;
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/**
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* @brief Create a new hashtable
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*
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* This function creates a new hashtable with the specified size.
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* It initializes the table with NULL entries.
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*
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* @param size The size of the hashtable
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* @return A pointer to the newly created hashtable
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*/
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hashtable *hashtable_new(int size);
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/**
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* @brief Insert a new key-value pair into the hashtable
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*
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* This function inserts a new key-value pair into the hashtable.
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* It calculates the index using the hash function and inserts the
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* key-value pair at the beginning of the linked list at that index.
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*
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* @param h Pointer to the hashtable
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* @param key Pointer to the key
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* @param value Pointer to the value
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*/
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void hashtable_insert(hashtable *h, const char *key, void *value);
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/**
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* @brief Get the value associated with a key from the hashtable
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*
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* This function takes a hashtable and a key as input and returns the
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* value associated with the key. If the key is not found in the
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* hashtable, it returns NULL.
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*
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* @param h Pointer to the hashtable
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* @param key Pointer to the key
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* @return Pointer to the value associated with the key, or NULL if not found
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*/
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void *hashtable_lookup(hashtable *h, const char *key);
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/**
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* @brief Remove a key-value pair from the hashtable
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*
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* This function removes a key-value pair from the hashtable.
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* It calculates the index using the hash function and traverses
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* the linked list at that index. If the key is found, it removes
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* the corresponding entry from the linked list and frees the memory.
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*
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* @param h Pointer to the hashtable
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* @param key Pointer to the key to remove
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*/
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void hashtable_remove(hashtable *h, const char *key);
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#endif
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