void DecToString (unsigned char *str, unsigned int value, unsigned char max_chars, 
                  unsigned char type)

/*
This function converts a decimal number into a string. 
As it features some formatting, it can be used as a small 
replacement for sprintf().

str       = output string
value     = input integer
max_chars = number of output characters
type      = type of leading characters (0='0', 1=' ' )

Note: 
For less memory consumption this implementaion can only handle integers.
But if you adjust the type of the "value" and "factor" variables, this 
function can easily handle bigger numbers than integer!

written by Oliver Keller <oli@deswahnsinnsfettebeute.de>
06.04.2004
*/

void DecToString (unsigned char *str, int value, unsigned char max_chars, unsigned char type)
{
  unsigned char i=0;
  unsigned char digit_count=0;
  unsigned char leading_count=0;  // number of _needed_ leading characters
  unsigned int factor=1;
  unsigned char number=0;

  while(value / factor)
  {
    digit_count++;        // count digits
    factor *= 10;         // calculate factor
  }
  factor /= 10;

  if (digit_count)
    leading_count = max_chars - digit_count;
  else
    leading_count = max_chars - digit_count - 1;

  while(i < leading_count)
  {                       // fill up leading chars
    if(type)
      str[i++]=' ';
    else
       str[i++]='0';
  }

  if (digit_count)
  {
    while(factor)
    {                     // convert int to chars
      number = value / factor; 
      value %= factor;
      factor /= 10;
      str[i++] = number + 48;
    }
  }
  else
  {
    str[i++]='0';         // keep at least one zero!
  }
  str[i++]='\0';
}