utils.c

#include <lcom/lcf.h>
#include <stdint.h>
//Self-explanatory: gets 8 least significant bits from initial counting value
int(util_get_LSB)(uint16_t val, uint8_t *lsb) {
	if(lsb == NULL){
		//printf("Err: trying to write in null pointer");
		return 1;
	}
	*lsb = (uint8_t) (val & 0x00FF);
  return 0; 
}
//Self-explanatory: gets 8 most significant bits from initial counting value
int(util_get_MSB)(uint16_t val, uint8_t *msb) {
	if(msb == NULL){
		//printf("Err: trying to write in null pointer\n");
		return 1;
	}
	*msb = (uint8_t) ((val & 0xFF00) >> 8);
  return 0;
}

int (util_sys_inb)(int port, uint8_t *value) {
	uint32_t temp;
  if(sys_inb(port,&temp) != OK){
    //printf("ERR: util_sys_inb --sys_inb** error reading information from timer register");
    return 1; 
  } 
  *value = (uint8_t) temp;
  return 0;
}

//Returns pointer to a C-string containing a integer in binary
//This function was only used in early stages of implementation though
char * (to_binary)(uint32_t size,uint32_t n){ 
	char * buffer;
	buffer = (char*) malloc(sizeof(char)*(size+1));
	int c;
	uint32_t temp,k;
	for(c = size-1,k=0;c>=0;c--,k++){
		temp = n >> c;
		if(temp & 1)
			*(buffer+k) = '1';
		else
			*(buffer+k) = '0';
	}
	return buffer;
}