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/*

FUNCTION

<>---unsigned integer to string

INDEX

	utoa

ANSI_SYNOPSIS

	#include 

	char *utoa(unsigned <[value]>, char *<[str]>, int <[base]>);

	char *__utoa(unsigned <[value]>, char *<[str]>, int <[base]>);

DESCRIPTION

<> converts the unsigned integer [] to a null-terminated string

using the specified base, which must be between 2 and 36, inclusive.

<[str]> should be an array long enough to contain the converted

value, which in the worst case is sizeof(int)*8+1 bytes.

RETURNS

A pointer to the string, <[str]>, or NULL if <[base]> is invalid.

PORTABILITY

<> is non-ANSI.

No supporting OS subroutine calls are required.

*/

#include 

char *

_DEFUN (__utoa, (value, str, base),

        unsigned value _AND

        char *str _AND

        int base)

{

  const char digits[] = "0123456789abcdefghijklmnopqrstuvwxyz";

  int i, j;

  unsigned remainder;

  char c;

  /* Check base is supported. */

  if ((base < 2) || (base > 36))

    {

      str[0] = '\0';

      return NULL;

    }

  /* Convert to string. Digits are in reverse order.  */

  i = 0;

  do

    {

      remainder = value % base;

      str[i++] = digits[remainder];

      value = value / base;

    } while (value != 0);

  str[i] = '\0';

  /* Reverse string.  */

  for (j = 0, i--; j < i; j++, i--)

    {

      c = str[j];

      str[j] = str[i];

      str[i] = c;

    }

  return str;

}

char *

_DEFUN (utoa, (value, str, base),

        unsigned value _AND

        char *str _AND

        int base)

{

  return __utoa (value, str, base);

}