Function hl_peek

src/fifo.c:84–110

}

int hl_peek(FIFO_RIG *fifo)
{
    if (fifo == NULL) { return -1; }

    if (fifo->tail < 0 || fifo->head < 0) { return -1; }

    if (fifo->tail > 1023 || fifo->head > 1023) { return -1; }

    if (fifo->tail == fifo->head) { return -1; }

    pthread_mutex_lock(&fifo->mutex);
    char c = fifo->data[fifo->head];

#if 0

    if (isalnum(c))
        rig_debug(RIG_DEBUG_VERBOSE, "%s: peek %c (%d,%d)\n", __func__, c, fifo->head,
                  fifo->tail);
    else
        rig_debug(RIG_DEBUG_VERBOSE, "%s: peek 0x%02x (%d,%d)\n", __func__, c,
                  fifo->head,
                  fifo->tail);

#endif
    pthread_mutex_unlock(&fifo->mutex);
    return c;
}

int hl_pop(FIFO_RIG *fifo)
{