hash.c

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/**
 * \file    heivs/hash.c
 * \see     heivs/hash.h
 */

#include "heivs/hash.h"

status_e hash_init(struct heivs_hash_t *hash, void *state, size_t state_size)
{
    status_e status;

    if (hash->state != HASH_STATE_IDLE)
    {
        return ERROR_AGAIN;
    }

    if (state_size < hash->state_size)
    {
        return ERROR_BAD_PARAM;
    }

    if (state == NULL)
    {
        return ERROR_NULL_PARAM;
    }

    status = hash->init(hash, state, state_size);
    if (status != NO_ERROR)
    {
        return status;
    }

    hash->state = HASH_STATE_BUSY;

    return NO_ERROR;
}

status_e hash_run(struct heivs_hash_t *hash, void *state, const void *data, size_t size)
{
    status_e status;

    if (hash->state != HASH_STATE_BUSY)
    {
        return ERROR_BAD_STATE;
    }

    status = hash->run(hash, state, data, size);
    if (status != NO_ERROR)
    {
        hash->state = HASH_STATE_IDLE;
        return status;
    }

    return NO_ERROR;
}

status_e hash_finish(struct heivs_hash_t *hash, void *state)
{
    status_e status;

    if (hash->state != HASH_STATE_BUSY)
    {
        return ERROR_BAD_STATE;
    }

    status = hash->finish(hash, state);
    if (status != NO_ERROR)
    {
        hash->state = HASH_STATE_IDLE;
        return status;
    }

    hash->state = HASH_STATE_IDLE;

    return NO_ERROR;
}