static char *ultoa (unsigned long val, char *s, int radix)
{
if (radix < 2 || radix > 36)
s[0] = 0;
else
*ultoa_recursive (val, s, radix) = 0;
return s;
}
static char *ultoa_recursive (unsigned long val, char *s, unsigned radix)
{
int c;
if (val >= radix)
s = ultoa_recursive (val / radix, s, radix);
c = val % radix;
c += (c < 10 ? '0' : 'a' - 10);
*s++ = c;
return s;
}
char *ltoa (long val, char *s, int radix)
{
if (radix < 2 || radix > 36) {
s[0] = 0;
} else {
char *p = s;
if (radix == 10 && val < 0) {
val = -val;
*p++ = '-';
}
*ultoa_recursive (val, p, radix) = 0;
}
return s;
}
