Function CO_fifo_read

301/CO_fifo.c:118–162

}

size_t
CO_fifo_read(CO_fifo_t* fifo, uint8_t* buf, size_t count, bool_t* eof) {
    size_t i;
    const uint8_t* bufSrc;
    bool_t alive_cycle = true;

    if (eof != NULL) {
        *eof = false;
    }
    if ((fifo == NULL) || (buf == NULL) || (fifo->readPtr == fifo->writePtr)) {
        return 0;
    }

    bufSrc = &fifo->buf[fifo->readPtr];
    for (i = count; (i > 0U) && alive_cycle;) {
        const uint8_t c = *bufSrc;

        /* is circular buffer empty */
        if (fifo->readPtr == fifo->writePtr) {
            alive_cycle = false;
        } else {
            *buf = c;
            buf++;

            /* increment variables */
            if (++fifo->readPtr == fifo->bufSize) {
                fifo->readPtr = 0;
                bufSrc = &fifo->buf[0];
            } else {
                bufSrc++;
            }
            i--;

#if ((CO_CONFIG_FIFO)&CO_CONFIG_FIFO_ASCII_COMMANDS) != 0
            /* is delimiter? */
            if ((eof != NULL) && (c == DELIM_COMMAND)) {
                *eof = true;
                alive_cycle = false;
            }
#endif
        }
    }

    return count - i;
}

#if ((CO_CONFIG_FIFO)&CO_CONFIG_FIFO_ALT_READ) != 0
size_t