/*
 * Copyright (C) 2017 Robin Krahl <robin.krahl@ireas.org>
 * 
 * This program is free software: you can redistribute it and/or modify it
 * under the terms of the GNU General Public License as published by the Free
 * Software Foundation, either version 3 of the License, or (at your option)
 * any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 */

#include <garmos/term.h>
#include <garmos/types.h>
#include <garmos/vga.h>

struct term {
	uint32_t row;
	uint32_t col;
};

static struct term term = {
	.row = 0,
	.col = 0
};

#ifdef ENABLE_VGA

void term_clear(void)
{
	vga_clear();
}

void term_put(char c)
{
	if (term.col + 1 >= VGA_COLS || c == '\n') {
		term.col = 0;
		term.row++;

		if (term.row >= VGA_ROWS) {
			/* TODO: scroll */
			term.row = 0;
		}
	}

	if (c != '\n') {
		vga_print(term.row, term.col, c);
		term.col++;
	}
}

uint8_t term_enabled(void) {
	return 1;
}

#else

/* no supported output found! */

void term_clear(void) {}

void term_put(char c) {}

uint8_t term_enabled(void) {
	return 0;
}

#endif

void term_print(char *s)
{
	for (; *s != '\0'; s++)
		term_put(*s);
}