stdio.c

#include <libc.h>
#include <stdio.h>

/* Funcio print que va escrivint el buffer mitjançant un write
   de 256 en 256 bytes fins que troba el caràcter \0. Retorna
   el numero de caracters escrits.*/
int
printf (char *buffer)
{
  int i = 0, written = 0;

  while (buffer[i] != '\0')
    i++;

  /* buff_d = n de vegades que s'ha de fer un write de 256 bytes
     buff_r = n de bytes que queden al final del buffer < 256 bytes
   */
  int buff_d = i / 256;
  int buff_r = i % 256;

  for (i = 0; i < buff_d; i++)
    {
      buffer = buffer + (i * 256 * sizeof (char));
      written = written + write (1, buffer, 256);
    }

  buffer = buffer + (i * 256 * sizeof (char));

  if (buff_r != 0)
    written = written + write (1, buffer, buff_r);

  return written;
}

void
printint (int i)
{
  char buffer[11] =
    { '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0', '\0' };
  itoa (i, buffer);
  printf (buffer);
}

void
itoa (int n, char *buffer)
{
  int ndigits = n;
  int i = 0;

  if (n == 0)
    buffer[0] = '0';

  /* Comptem el nombre de digits */
  while (ndigits > 0)
    {
      i++;
      ndigits /= 10;
    }


  while (i > 0)
    {
      buffer[i - 1] = (n % 10) + '0';
      n /= 10;
      i--;
    }

}