Function str_to_datetime

sql-common/my_time.c:268–605

#define MAX_DATE_PARTS 8

my_bool
str_to_datetime(const char *str, uint length, MYSQL_TIME *l_time,
                ulonglong flags, MYSQL_TIME_STATUS *status)
{
  uint field_length, UNINIT_VAR(year_length), digits, i, number_of_fields;
  uint date[MAX_DATE_PARTS], date_len[MAX_DATE_PARTS];
  uint add_hours= 0, start_loop;
  ulong not_zero_date, allow_space;
  my_bool is_internal_format;
  const char *pos, *UNINIT_VAR(last_field_pos);
  const char *end=str+length;
  const uchar *format_position;
  my_bool found_delimitier= 0, found_space= 0;
  uint frac_pos, frac_len;
  DBUG_ENTER("str_to_datetime");
  DBUG_PRINT("ENTER",("str: %.*s",length,str));

  LINT_INIT(field_length);

  my_time_status_init(status);

  /* Skip space at start */
  for (; str != end && my_isspace(&my_charset_latin1, *str) ; str++)
    ;
  if (str == end || ! my_isdigit(&my_charset_latin1, *str))
  {
    status->warnings= MYSQL_TIME_WARN_TRUNCATED;
    l_time->time_type= MYSQL_TIMESTAMP_NONE;
    DBUG_RETURN(1);
  }

  is_internal_format= 0;
  /* This has to be changed if want to activate different timestamp formats */
  format_position= internal_format_positions;

  /*
    Calculate number of digits in first part.
    If length= 8 or >= 14 then year is of format YYYY.
    (YYYY-MM-DD,  YYYYMMDD, YYYYYMMDDHHMMSS)
  */
  for (pos=str;
       pos != end && (my_isdigit(&my_charset_latin1,*pos) || *pos == 'T');
       pos++)
    ;

  digits= (uint) (pos-str);
  start_loop= 0;                                /* Start of scan loop */
  date_len[format_position[0]]= 0;              /* Length of year field */
  if (pos == end || *pos == '.')
  {
    /* Found date in internal format (only numbers like YYYYMMDD) */
    year_length= (digits == 4 || digits == 8 || digits >= 14) ? 4 : 2;
    field_length= year_length;
    is_internal_format= 1;
    format_position= internal_format_positions;
  }
  else
  {