static void pin_to_bits()

in panel.c [626:677]

• 46 lines of code
• 10 McCabe index (conditional complexity)

static void pin_to_bits(int pin, unsigned char *d_val, unsigned char *c_val)
{
	int d_bit, c_bit, inv;

	d_val[0] = 0;
	c_val[0] = 0;
	d_val[1] = 0;
	c_val[1] = 0;
	d_val[2] = 0xFF;
	c_val[2] = 0xFF;

	if (pin == 0)
		return;

	inv = (pin < 0);
	if (inv)
		pin = -pin;

	d_bit = 0;
	c_bit = 0;

	switch (pin) {
	case PIN_STROBE:	/* strobe, inverted */
		c_bit = PNL_PSTROBE;
		inv = !inv;
		break;
	case PIN_D0...PIN_D7:	/* D0 - D7 = 2 - 9 */
		d_bit = 1 << (pin - 2);
		break;
	case PIN_AUTOLF:	/* autofeed, inverted */
		c_bit = PNL_PAUTOLF;
		inv = !inv;
		break;
	case PIN_INITP:		/* init, direct */
		c_bit = PNL_PINITP;
		break;
	case PIN_SELECP:	/* select_in, inverted */
		c_bit = PNL_PSELECP;
		inv = !inv;
		break;
	default:		/* unknown pin, ignore */
		break;
	}

	if (c_bit) {
		c_val[2] &= ~c_bit;
		c_val[!inv] = c_bit;
	} else if (d_bit) {
		d_val[2] &= ~d_bit;
		d_val[!inv] = d_bit;
	}
}