caldate_scan.c

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#include "caldate.h"
 
unsigned int caldate_scan(char *s,struct caldate *cd)
{
  int sign = 1;
  char *t = s;
  unsigned long z;
  unsigned long c;
 
  if (*t == '-') { ++t; sign = -1; }
  z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
  cd->year = z * sign;
 
  if (*t++ != '-') return 0;
  z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
  cd->month = z;
 
  if (*t++ != '-') return 0;
  z = 0; while ((c = (unsigned char) (*t - '0')) <= 9) { z = z * 10 + c; ++t; }
  cd->day = z;
 
  return t - s;
}