Function parse_date_time_format

sql/sql_time.cc:686–898

*/

bool parse_date_time_format(timestamp_type format_type, 
			    const char *format, uint format_length,
			    DATE_TIME_FORMAT *date_time_format)
{
  uint offset= 0, separators= 0;
  const char *ptr= format, *format_str;
  const char *end= ptr+format_length;
  uchar *dt_pos= date_time_format->positions;
  /* need_p is set if we are using AM/PM format */
  bool need_p= 0, allow_separator= 0;
  ulong part_map= 0, separator_map= 0;
  const char *parts[16];

  date_time_format->time_separator= 0;
  date_time_format->flag= 0;			// For future

  /*
    Fill position with 'dummy' arguments to found out if a format tag is
    used twice (This limit's the format to 255 characters, but this is ok)
  */
  dt_pos[0]= dt_pos[1]= dt_pos[2]= dt_pos[3]=
    dt_pos[4]= dt_pos[5]= dt_pos[6]= dt_pos[7]= 255;

  for (; ptr != end; ptr++)
  {
    if (*ptr == '%' && ptr+1 != end)
    {
      uint position;
      LINT_INIT(position);
      switch (*++ptr) {
      case 'y':					// Year
      case 'Y':
	position= 0;
	break;
      case 'c':					// Month
      case 'm':
	position= 1;
	break;
      case 'd':
      case 'e':
	position= 2;
	break;
      case 'h':
      case 'I':
      case 'l':
	need_p= 1;				// Need AM/PM
	/* Fall through */
      case 'k':
      case 'H':
	position= 3;
	break;
      case 'i':
	position= 4;
	break;
      case 's':
      case 'S':
	position= 5;
	break;