url_encode

url_encode.c

/*
** main.c for osef in /exam//rendu/ex_5
** 
** Made by aliou diallo
** Login   <[email protected]>
** 
** Started on  Sat Nov 24 11:08:38 2012 aliou diallo
** Last update Sat Nov 24 11:34:57 2012 aliou diallo
*/

void	my_putcc(char c)
{
  write(1, &c, 1);
}

int	is_unsafe(char c)
{
  return (c == '{' || c == '}' || c == '|' || c == '\\' || c == '^' || 
	  c == '~' || c == '[' || c == ']' || c == '`' || c == '+' || c == '<'
	  || c == '>' || c == '"' || c == '#' || c == '%' || c == ';'
	  || c == '/' || c == '?' || c == ':' || c == '@' || c == '='
	  || c == '&' || c == '\'');
}

int	print_hex(char c)
{
  int	nb;

  nb = (int) c;
  my_putcc('%');
  my_putcc("0123456789ABCDEF"[nb / 16]);
  my_putcc("0123456789ABCDEF"[nb % 16]);
}

void	url_encode(char *str)
{
  while (*str)
    {
      if (*str == ' ')
	my_putcc('+');
      else if (is_unsafe(*str))
	print_hex(*str);
      else
	my_putcc(*str);
      *str++;
    }
}

int	main(int ac, char **av)
{
  if (ac == 2)
      url_encode(av[1]);
  my_putcc('\n');
}