#include "../includes/io.h"
#include "../includes/kernel.h"

//char* msg = "Hello, World!";

void kmain()
{
	draw_s("Hello, World!", 2, 9);/*
	write_screen(0, "k", 2, 9);
	write_screen(2, 'e', 2, 9);
	write_screen(4, 'r', 2, 9);
	write_screen(6, 'n', 2, 9);
	write_screen(8, 'e', 2, 9);
	write_screen(10, 'l', 2, 9);
	write_screen(12, ' ', 2, 9);
	write_screen(14, '3', 2, 9);
	//asm("hlt");*/
}

void write_screen(unsigned int i, char c, unsigned char fg, unsigned char bg)
{
	char *fb = (char *) 0x000B8000;
	fb[i] = c;
	fb[i + 1] = ((fg & 0x0F) << 4) | (bg & 0x0F);
}

void move(unsigned short pos)
{
	outb(0x3D4, 14);
	outb(0x3D5, ((pos >> 8 ) & 0x00FF));
	outb(0x3D4, 15);
	outb(0x3D5, pos & 0x00FF);
}

void draw_s(char* string, unsigned char fg, unsigned char bg)
{
	char *video_buffer = 0x000B8000;
	for(int i = 0; i < strlen(string); i++)
	{
		video_buffer[i] = string[i];
		video_buffer[i+1] = ((fg & 0x0f) << 4) | (bg & 0x0F);
	}
}

int strlen(char* string)
{
	int len = 0;
	
	for(int i = 0; string[i] != '\0'; i++) len++;
	
	return len;
}