#ifndef FZL_CONST_SET_H
#define FZL_CONST_SET_H

#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>

// Constant types
typedef enum
{
  FZL_CONSTTYPE_STRING,
} fzl_consttype_t;

// Constant descriptor
typedef struct
{
  fzl_consttype_t type;

  union
  {
    struct
    {
      const char *chars;
      size_t length;
    } string;

    struct
    {
      uint64_t value;
    } num;
  } as;
} fzl_const_t;

typedef struct
{
  ssize_t pool_index;
} fzl_const_hash_slot_t;

// Constant pool descriptor
typedef struct
{
  fzl_const_t *array;
  size_t size;
  size_t capacity;

  fzl_const_hash_slot_t *slots;
  size_t slots_count;
  size_t slots_capacity;
} fzl_const_hash_pool_t;

// Compare two constants for equality
bool fzl_consts_equal(fzl_const_t a, fzl_const_t b);

// Get hash of specified constant
uint32_t fzl_hash_const(fzl_const_t c);

// Allocate constants hash pool
fzl_const_hash_pool_t *fzl_mkconstpool();

// Resize the hash table
void fzl_consts_pool_resize_hash(fzl_const_hash_pool_t *pool);

// Push constant. Returns unique index
size_t fzl_consts_pool_add(fzl_const_hash_pool_t *pool, fzl_const_t c);

// Free constants hash pool
void fzl_consts_pool_free(fzl_const_hash_pool_t *pool);

#endif // FZL_CONST_SET_H