Untitled_Kernel/src/main.c

//Our own code, at this point...
//#include <stddef.h>
#include <stdint.h>
#include "kernio.h"

//convert digits from int num to buffer buf. in hex. This is 32 bit only for now!
//WARN: integer is written from right to left into the buffer, and will halt if the buffer is too small.
void i_to_str(uint32_t num, char* buf, int size) {
    //null terminate the string
    buf[--size] = '\0';
    while(size > 0 && (num) != 0){
        int isolated_num = num % 0x10;
        if(isolated_num > 9){
            isolated_num+=7;
        }
        buf[--size] = '0' + isolated_num;
        num/=0x10;
    }

    //now shift the whole thing to the left
    if(size != 0) {
        while(buf[size]!='\0') {
            *buf = buf[size];
            buf++;
        } 
        *buf = '\0'; 
    }
}


//finally, main.
void kern_main()
{

    //wipe the screen
	vga_clear();

	//IT IS TIME. TO PRINT.
    char lol[5];
    i_to_str(0xCAFEBABE, lol, 5); 
	vga_println(lol);
}