static int handle_goto()

in speakup/main.c [1936:2019]

• 77 lines of code
• 27 McCabe index (conditional complexity)

static int handle_goto(struct vc_data *vc, u_char type, u_char ch, u_short key)
{
	static u_char goto_buf[8];
	static int num;
	int maxlen;
	char *cp;
	u16 wch;

	if (type == KT_SPKUP && ch == SPEAKUP_GOTO)
		goto do_goto;
	if (type == KT_LATIN && ch == '\n')
		goto do_goto;
	if (type != 0)
		goto oops;
	if (ch == 8) {
		u16 wch;

		if (num == 0)
			return -1;
		wch = goto_buf[--num];
		goto_buf[num] = '\0';
		spkup_write(&wch, 1);
		return 1;
	}
	if (ch < '+' || ch > 'y')
		goto oops;
	wch = ch;
	goto_buf[num++] = ch;
	goto_buf[num] = '\0';
	spkup_write(&wch, 1);
	maxlen = (*goto_buf >= '0') ? 3 : 4;
	if ((ch == '+' || ch == '-') && num == 1)
		return 1;
	if (ch >= '0' && ch <= '9' && num < maxlen)
		return 1;
	if (num < maxlen - 1 || num > maxlen)
		goto oops;
	if (ch < 'x' || ch > 'y') {
oops:
		if (!spk_killed)
			synth_printf(" %s\n", spk_msg_get(MSG_GOTO_CANCELED));
		goto_buf[num = 0] = '\0';
		spk_special_handler = NULL;
		return 1;
	}

	/* Do not replace with kstrtoul: here we need cp to be updated */
	goto_pos = simple_strtoul(goto_buf, &cp, 10);

	if (*cp == 'x') {
		if (*goto_buf < '0')
			goto_pos += spk_x;
		else if (goto_pos > 0)
			goto_pos--;

		if (goto_pos >= vc->vc_cols)
			goto_pos = vc->vc_cols - 1;
		goto_x = 1;
	} else {
		if (*goto_buf < '0')
			goto_pos += spk_y;
		else if (goto_pos > 0)
			goto_pos--;

		if (goto_pos >= vc->vc_rows)
			goto_pos = vc->vc_rows - 1;
		goto_x = 0;
	}
	goto_buf[num = 0] = '\0';
do_goto:
	spk_special_handler = NULL;
	spk_parked |= 0x01;
	if (goto_x) {
		spk_pos -= spk_x * 2;
		spk_x = goto_pos;
		spk_pos += goto_pos * 2;
		say_word(vc);
	} else {
		spk_y = goto_pos;
		spk_pos = vc->vc_origin + (goto_pos * vc->vc_size_row);
		say_line(vc);
	}
	return 1;
}