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#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
// Simple hashtable structure (key -> void*)
// Supports adding, seeking, removing
// When adding a binding to the table, the previous binding for same key (if exists) is removed
// The hashtbl is allocated with malloc/free
// The keys are not copied in any way by the hashtbl, but there might still be something
// to free, so the create_hashtbl function is given a key freeing function, usually
// null when no freeing is required, or the standard free function.
struct hashtbl;
typedef struct hashtbl hashtbl_t;
typedef size_t hash_t;
typedef hash_t (*hash_fun_t)(const void*);
typedef bool (*key_eq_fun_t)(const void*, const void*);
typedef void (*key_free_fun_t)(void*);
hashtbl_t* create_hashtbl(key_eq_fun_t ef, hash_fun_t hf, key_free_fun_t ff, size_t initial_size); // 0 -> default size
void delete_hashtbl(hashtbl_t* ht);
int hashtbl_add(hashtbl_t* ht, void* key, void* v); // non-null on error (OOM for instance)
void* hashtbl_find(hashtbl_t* ht, void* key); // null when not found
void hashtbl_remove(hashtbl_t* ht, void* key);
size_t hashtbl_count(hashtbl_t* ht);
hash_t id_hash_fun(const void* v);
hash_t str_hash_fun(const void* v);
bool id_key_eq_fun(const void* a, const void* b);
bool str_key_eq_fun(const void* a, const void* b);
/* vim: set ts=4 sw=4 tw=0 noet :*/
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