#include <stdlib.h>
#include <string.h>

#include <hexagram/hash.h>

int hexagram_hash(void *data, size_t size, uint32_t *hash) {
    uint32_t value = 0x00;
    size_t i;

    if (data == NULL) {
        goto error_null_data;
    }

    for (i=0; i<size; i++) {
        value += ((uint8_t *)data)[i];
        value += (value << 10);
        value ^= (value >>  6);
    }

    value += (value <<  3);
    value ^= (value >> 11);
    value += (value << 15);

    *hash = value;

    return 0;

error_null_data:
    return -1;
}