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deps/mysqllite/include/internal/my_time.h

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+/* Copyright (C) 2004-2005 MySQL AB
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; version 2 of the License.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software
+ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
+
+/*
+  This is a private header of sql-common library, containing
+  declarations for my_time.c
+*/
+
+#ifndef _my_time_h_
+#define _my_time_h_
+#include "my_global.h"
+#include "mysql_time.h"
+
+C_MODE_START
+
+extern ulonglong log_10_int[20];
+extern uchar days_in_month[];
+
+/*
+  Portable time_t replacement.
+  Should be signed and hold seconds for 1902 -- 2038-01-19 range
+  i.e at least a 32bit variable
+
+  Using the system built in time_t is not an option as
+  we rely on the above requirements in the time functions
+*/
+typedef long my_time_t;
+
+#define MY_TIME_T_MAX LONG_MAX
+#define MY_TIME_T_MIN LONG_MIN
+
+/* Time handling defaults */
+#define TIMESTAMP_MAX_YEAR 2038
+#define TIMESTAMP_MIN_YEAR (1900 + YY_PART_YEAR - 1)
+#define TIMESTAMP_MAX_VALUE INT_MAX32
+#define TIMESTAMP_MIN_VALUE 1
+
+/* two-digit years < this are 20..; >= this are 19.. */
+#define YY_PART_YEAR	   70
+
+/* Flags to str_to_datetime */
+#define TIME_FUZZY_DATE		1
+#define TIME_DATETIME_ONLY	2
+/* Must be same as MODE_NO_ZERO_IN_DATE */
+#define TIME_NO_ZERO_IN_DATE    (65536L*2*2*2*2*2*2*2)
+/* Must be same as MODE_NO_ZERO_DATE */
+#define TIME_NO_ZERO_DATE	(TIME_NO_ZERO_IN_DATE*2)
+#define TIME_INVALID_DATES	(TIME_NO_ZERO_DATE*2)
+
+#define MYSQL_TIME_WARN_TRUNCATED    1
+#define MYSQL_TIME_WARN_OUT_OF_RANGE 2
+
+/* Limits for the TIME data type */
+#define TIME_MAX_HOUR 838
+#define TIME_MAX_MINUTE 59
+#define TIME_MAX_SECOND 59
+#define TIME_MAX_VALUE (TIME_MAX_HOUR*10000 + TIME_MAX_MINUTE*100 + \
+                        TIME_MAX_SECOND)
+#define TIME_MAX_VALUE_SECONDS (TIME_MAX_HOUR * 3600L + \
+                                TIME_MAX_MINUTE * 60L + TIME_MAX_SECOND)
+
+my_bool check_date(const MYSQL_TIME *ltime, my_bool not_zero_date,
+                   ulonglong flags, int *was_cut);
+enum enum_mysql_timestamp_type
+str_to_datetime(const char *str, uint length, MYSQL_TIME *l_time,
+                ulonglong flags, int *was_cut);
+longlong number_to_datetime(longlong nr, MYSQL_TIME *time_res,
+                            ulonglong flags, int *was_cut);
+ulonglong TIME_to_ulonglong_datetime(const MYSQL_TIME *);
+ulonglong TIME_to_ulonglong_date(const MYSQL_TIME *);
+ulonglong TIME_to_ulonglong_time(const MYSQL_TIME *);
+ulonglong TIME_to_ulonglong(const MYSQL_TIME *);
+
+
+my_bool str_to_time(const char *str,uint length, MYSQL_TIME *l_time,
+                    int *warning);
+
+int check_time_range(struct st_mysql_time *, int *warning);
+
+long calc_daynr(uint year,uint month,uint day);
+uint calc_days_in_year(uint year);
+uint year_2000_handling(uint year);
+
+void my_init_time(void);
+
+
+/*
+  Function to check sanity of a TIMESTAMP value
+
+  DESCRIPTION
+    Check if a given MYSQL_TIME value fits in TIMESTAMP range.
+    This function doesn't make precise check, but rather a rough
+    estimate.
+
+  RETURN VALUES
+    FALSE   The value seems sane
+    TRUE    The MYSQL_TIME value is definitely out of range
+*/
+
+static inline my_bool validate_timestamp_range(const MYSQL_TIME *t)
+{
+  if ((t->year > TIMESTAMP_MAX_YEAR || t->year < TIMESTAMP_MIN_YEAR) ||
+      (t->year == TIMESTAMP_MAX_YEAR && (t->month > 1 || t->day > 19)) ||
+      (t->year == TIMESTAMP_MIN_YEAR && (t->month < 12 || t->day < 31)))
+    return FALSE;
+
+  return TRUE;
+}
+
+my_time_t 
+my_system_gmt_sec(const MYSQL_TIME *t, long *my_timezone,
+                  my_bool *in_dst_time_gap);
+
+void set_zero_time(MYSQL_TIME *tm, enum enum_mysql_timestamp_type time_type);
+
+/*
+  Required buffer length for my_time_to_str, my_date_to_str,
+  my_datetime_to_str and TIME_to_string functions. Note, that the
+  caller is still responsible to check that given TIME structure
+  has values in valid ranges, otherwise size of the buffer could
+  be not enough. We also rely on the fact that even wrong values
+  sent using binary protocol fit in this buffer.
+*/
+#define MAX_DATE_STRING_REP_LENGTH 30
+
+int my_time_to_str(const MYSQL_TIME *l_time, char *to);
+int my_date_to_str(const MYSQL_TIME *l_time, char *to);
+int my_datetime_to_str(const MYSQL_TIME *l_time, char *to);
+int my_TIME_to_str(const MYSQL_TIME *l_time, char *to);
+
+/* 
+  Available interval types used in any statement.
+
+  'interval_type' must be sorted so that simple intervals comes first,
+  ie year, quarter, month, week, day, hour, etc. The order based on
+  interval size is also important and the intervals should be kept in a
+  large to smaller order. (get_interval_value() depends on this)
+ 
+  Note: If you change the order of elements in this enum you should fix 
+  order of elements in 'interval_type_to_name' and 'interval_names' 
+  arrays 
+  
+  See also interval_type_to_name, get_interval_value, interval_names
+*/
+
+enum interval_type
+{
+  INTERVAL_YEAR, INTERVAL_QUARTER, INTERVAL_MONTH, INTERVAL_WEEK, INTERVAL_DAY,
+  INTERVAL_HOUR, INTERVAL_MINUTE, INTERVAL_SECOND, INTERVAL_MICROSECOND,
+  INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR, INTERVAL_DAY_MINUTE,
+  INTERVAL_DAY_SECOND, INTERVAL_HOUR_MINUTE, INTERVAL_HOUR_SECOND,
+  INTERVAL_MINUTE_SECOND, INTERVAL_DAY_MICROSECOND, INTERVAL_HOUR_MICROSECOND,
+  INTERVAL_MINUTE_MICROSECOND, INTERVAL_SECOND_MICROSECOND, INTERVAL_LAST
+};
+
+C_MODE_END
+
+#endif /* _my_time_h_ */