#include "hash.h"
#include <stddef.h>
#include <stdlib.h>

Hasher* hasher_new()
{
    Hasher* hasher = malloc(sizeof(Hasher));
    *hasher = (Hasher) {};
    return hasher;
}

uint64_t hasher_finish(Hasher hasher)
{
    return hasher.state;
}

void hasher_free(Hasher* hasher)
{
    free(hasher);
}

void hasher_hash_u64(Hasher* hasher, uint64_t v)
{
    uint64_t value = hasher->state + v;

    value ^= value >> 33;
    value *= 0xff51afd7ed558ccdL;
    value ^= value >> 33;
    value *= 0xc4ceb9fe1a85ec53L;
    value ^= value >> 33;

    hasher->state = value;
}

void hasher_hash_u8(Hasher* hasher, uint8_t v)
{
    hasher_hash_u64(hasher, v);
}

void string_hash(Hasher* hasher, const char* str)
{
    for (size_t i = 0; str[i] != '\0'; ++i) {
        hasher_hash_u8(hasher, (uint8_t)str[i]);
    }
}

void size_hash(Hasher* hasher, size_t value)
{
    hasher_hash_u64(hasher, (uint64_t)value);
}