Related Blog Items

• Convert integer to binary string
• Unsigned long long (uint64) to string (ulltostr)
• Binary Streams Utility Classes
• Binary decimal conversion....
• Structure padding explained

Here is the code snippet which does conversion from unsigned long to string/ascii. There are library functions exists (ltostr, itoa) to integer to ascii, but there is no library function exists for unsigned long to ascii/string. ltostr converts signed long to string/ascii.

char *ultostr(unsigned long value, char *ptr, int base)
{
  unsigned long t = 0, res = 0;
  unsigned long tmp = value;
  int count = 0;
 
  if (NULL == ptr)
  {
    return NULL;
  }
 
  if (tmp == 0)
  {
    count++;
  }
 
  while(tmp > 0)
  {
    tmp = tmp/base;
    count++;
  }
 
  ptr += count;
 
  *ptr = '\0';
 
  do
  {
    res = value - base * (t = value / base);
    if (res < 10)
    {
      * - - ptr = '0' + res;
    }
    else if ((res >= 10) && (res < 16))
    {
        * - - ptr = 'A' - 10 + res;
    }
  } while ((value = t) != 0);
 
  return(ptr);
}

examples of usage of this function:

char ptr[1024];

ultostr(0xf34C5, ptr, 16);
output: "F34C5"

ultostr(0xf34C5, ptr, 10);
output: "996549"

ultostr(07624, ptr, 8);
output: "7624"

ultostr(07624, ptr, 10);
output: "3988"

download unsigned long to string/ascii/char * (ultostr) [ultostr.c].

Popularity: 23%

You need to log on to convert this article into PDF

Related Blog Items

• Convert integer to binary string
• Unsigned long long (uint64) to string (ulltostr)
• Binary Streams Utility Classes
• Binary decimal conversion....
• Structure padding explained

This entry was written by ponnada and posted on December 26, 2006 at 11:55 am and filed under C Tidbits, Conversions. Bookmark the permalink. Follow any comments here with the RSS feed for this post. Post a comment or leave a trackback: Trackback URL.