caldate_fmt.c

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#include "caldate.h"
 
unsigned int caldate_fmt(char *s,struct caldate *cd)
{
  long x;
  int i = 0;
 
  x = cd->year; if (x < 0) x = -x; do { ++i; x /= 10; } while(x);
 
  if (s) {
    x = cd->year;
    if (x < 0) { x = -x; *s++ = '-'; }
    s += i; do { *--s = '0' + (x % 10); x /= 10; } while(x); s += i;
 
    x = cd->month;
    s[0] = '-'; s[2] = '0' + (x % 10); x /= 10; s[1] = '0' + (x % 10);
 
    x = cd->day;
    s[3] = '-'; s[5] = '0' + (x % 10); x /= 10; s[4] = '0' + (x % 10);
  }
 
  return (cd->year < 0) + i + 6;
}