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my_time.c
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/* Copyright (c) 2004, 2016, Oracle and/or its affiliates. All rights reserved.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
#include <my_time.h>
#include <m_string.h>
#include <m_ctype.h>
#include <myisampack.h>
/* Windows version of localtime_r() is declared in my_global.h */
#include <my_global.h>
#include "binary_log_types.h"
ulonglong log_10_int[20]=
{
1, 10, 100, 1000, 10000UL, 100000UL, 1000000UL, 10000000UL,
100000000ULL, 1000000000ULL, 10000000000ULL, 100000000000ULL,
1000000000000ULL, 10000000000000ULL, 100000000000000ULL,
1000000000000000ULL, 10000000000000000ULL, 100000000000000000ULL,
1000000000000000000ULL, 10000000000000000000ULL
};
const char my_zero_datetime6[]= "0000-00-00 00:00:00.000000";
/* Position for YYYY-DD-MM HH-MM-DD.FFFFFF AM in default format */
static uchar internal_format_positions[]=
{0, 1, 2, 3, 4, 5, 6, (uchar) 255};
static char time_separator=':';
static ulong const days_at_timestart=719528; /* daynr at 1970.01.01 */
uchar days_in_month[]= {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 0};
/*
Offset of system time zone from UTC in seconds used to speed up
work of my_system_gmt_sec() function.
*/
static long my_time_zone=0;
/* Calc days in one year. works with 0 <= year <= 99 */
uint calc_days_in_year(uint year)
{
return ((year & 3) == 0 && (year%100 || (year%400 == 0 && year)) ?
366 : 365);
}
/**
Set MYSQL_TIME structure to 0000-00-00 00:00:00.000000
@param tm[OUT] The value to set.
@param time_type Timestasmp type
*/
void set_zero_time(MYSQL_TIME *tm,
enum enum_mysql_timestamp_type time_type)
{
memset(tm, 0, sizeof(*tm));
tm->time_type= time_type;
}
/**
Set hour, minute and second of a MYSQL_TIME variable to maximum time value.
Unlike set_max_time(), does not touch the other structure members.
*/
void set_max_hhmmss(MYSQL_TIME *tm)
{
tm->hour= TIME_MAX_HOUR;
tm->minute= TIME_MAX_MINUTE;
tm->second= TIME_MAX_SECOND;
}
/**
Set MYSQL_TIME variable to maximum time value
@param tm OUT The variable to set.
@param neg Sign: 1 if negative, 0 if positive.
*/
void set_max_time(MYSQL_TIME *tm, my_bool neg)
{
set_zero_time(tm, MYSQL_TIMESTAMP_TIME);
set_max_hhmmss(tm);
tm->neg= neg;
}
/**
@brief Check datetime value for validity according to flags.
@param[in] ltime Date to check.
@param[in] not_zero_date ltime is not the zero date
@param[in] flags flags to check
(see str_to_datetime() flags in my_time.h)
@param[out] was_cut set to 2 if value was invalid according to flags.
(Feb 29 in non-leap etc.) This remains unchanged
if value is not invalid.
@details Here we assume that year and month is ok!
If month is 0 we allow any date. (This only happens if we allow zero
date parts in str_to_datetime())
Disallow dates with zero year and non-zero month and/or day.
@return
0 OK
1 error
*/
my_bool check_date(const MYSQL_TIME *ltime, my_bool not_zero_date,
my_time_flags_t flags, int *was_cut)
{
if (not_zero_date)
{
if (((flags & TIME_NO_ZERO_IN_DATE) || !(flags & TIME_FUZZY_DATE)) &&
(ltime->month == 0 || ltime->day == 0))
{
*was_cut= MYSQL_TIME_WARN_ZERO_IN_DATE;
return TRUE;
}
else if ((!(flags & TIME_INVALID_DATES) &&
ltime->month && ltime->day > days_in_month[ltime->month-1] &&
(ltime->month != 2 || calc_days_in_year(ltime->year) != 366 ||
ltime->day != 29)))
{
*was_cut= MYSQL_TIME_WARN_OUT_OF_RANGE;
return TRUE;
}
}
else if (flags & TIME_NO_ZERO_DATE)
{
*was_cut= MYSQL_TIME_WARN_ZERO_DATE;
return TRUE;
}
return FALSE;
}
/**
Check if TIME fields are fatally bad and cannot be further adjusted.
@param ltime Time value.
@retval TRUE if the value is fatally bad.
@retval FALSE if the value is Ok.
*/
my_bool check_time_mmssff_range(const MYSQL_TIME *ltime)
{
return ltime->minute >= 60 || ltime->second >= 60 ||
ltime->second_part > 999999;
}
/**
Check TIME range. The value can include day part,
for example: '1 10:20:30.123456'.
minute, second and second_part values are not checked
unless hour is equal TIME_MAX_HOUR.
@param ltime Rime value.
@returns Test result.
@retval FALSE if value is Ok.
@retval TRUE if value is out of range.
*/
my_bool check_time_range_quick(const MYSQL_TIME *ltime)
{
longlong hour= (longlong) ltime->hour + 24LL * ltime->day;
/* The input value should not be fatally bad */
DBUG_ASSERT(!check_time_mmssff_range(ltime));
if (hour <= TIME_MAX_HOUR &&
(hour != TIME_MAX_HOUR || ltime->minute != TIME_MAX_MINUTE ||
ltime->second != TIME_MAX_SECOND || !ltime->second_part))
return FALSE;
return TRUE;
}
/**
Check datetime, date, or normalized time (i.e. time without days) range.
@param ltime Datetime value.
@returns
@retval FALSE on success
@retval TRUE on error
*/
my_bool check_datetime_range(const MYSQL_TIME *ltime)
{
/*
In case of MYSQL_TIMESTAMP_TIME hour value can be up to TIME_MAX_HOUR.
In case of MYSQL_TIMESTAMP_DATETIME it cannot be bigger than 23.
*/
return
ltime->year > 9999U || ltime->month > 12U || ltime->day > 31U ||
ltime->minute > 59U || ltime->second > 59U || ltime->second_part > 999999U ||
(ltime->hour >
(ltime->time_type == MYSQL_TIMESTAMP_TIME ? TIME_MAX_HOUR : 23U));
}
/*
Convert a timestamp string to a MYSQL_TIME value.
SYNOPSIS
str_to_datetime()
str String to parse
length Length of string
l_time Date is stored here
flags Bitmap of following items
TIME_FUZZY_DATE Set if we should allow partial dates
TIME_DATETIME_ONLY Set if we only allow full datetimes.
TIME_NO_ZERO_IN_DATE Don't allow partial dates
TIME_NO_ZERO_DATE Don't allow 0000-00-00 date
TIME_INVALID_DATES Allow 2000-02-31
status Conversion status
DESCRIPTION
At least the following formats are recogniced (based on number of digits)
YYMMDD, YYYYMMDD, YYMMDDHHMMSS, YYYYMMDDHHMMSS
YY-MM-DD, YYYY-MM-DD, YY-MM-DD HH.MM.SS
YYYYMMDDTHHMMSS where T is a the character T (ISO8601)
Also dates where all parts are zero are allowed
The second part may have an optional .###### fraction part.
NOTES
This function should work with a format position vector as long as the
following things holds:
- All date are kept together and all time parts are kept together
- Date and time parts must be separated by blank
- Second fractions must come after second part and be separated
by a '.'. (The second fractions are optional)
- AM/PM must come after second fractions (or after seconds if no fractions)
- Year must always been specified.
- If time is before date, then we will use datetime format only if
the argument consist of two parts, separated by space.
Otherwise we will assume the argument is a date.
- The hour part must be specified in hour-minute-second order.
status->warnings is set to:
0 Value OK
MYSQL_TIME_WARN_TRUNCATED If value was cut during conversion
MYSQL_TIME_WARN_OUT_OF_RANGE check_date(date,flags) considers date invalid
l_time->time_type is set as follows:
MYSQL_TIMESTAMP_NONE String wasn't a timestamp, like
[DD [HH:[MM:[SS]]]].fraction.
l_time is not changed.
MYSQL_TIMESTAMP_DATE DATE string (YY MM and DD parts ok)
MYSQL_TIMESTAMP_DATETIME Full timestamp
MYSQL_TIMESTAMP_ERROR Timestamp with wrong values.
All elements in l_time is set to 0
RETURN VALUES
0 - Ok
1 - Error
*/
#define MAX_DATE_PARTS 8
my_bool
str_to_datetime(const char *str, size_t length, MYSQL_TIME *l_time,
my_time_flags_t flags, MYSQL_TIME_STATUS *status)
{
uint field_length= 0, year_length= 0, 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, *last_field_pos= NULL;
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", (int)length, str));
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
{
if (format_position[0] >= 3) /* If year is after HHMMDD */
{
/*
If year is not in first part then we have to determinate if we got
a date field or a datetime field.
We do this by checking if there is two numbers separated by
space in the input.
*/
while (pos < end && !my_isspace(&my_charset_latin1, *pos))
pos++;
while (pos < end && !my_isdigit(&my_charset_latin1, *pos))
pos++;
if (pos == end)
{
if (flags & TIME_DATETIME_ONLY)
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type= MYSQL_TIMESTAMP_NONE;
DBUG_RETURN(1); /* Can't be a full datetime */
}
/* Date field. Set hour, minutes and seconds to 0 */
date[0]= date[1]= date[2]= date[3]= date[4]= 0;
start_loop= 5; /* Start with first date part */
}
}
field_length= format_position[0] == 0 ? 4 : 2;
}
/*
Only allow space in the first "part" of the datetime field and:
- after days, part seconds
- before and after AM/PM (handled by code later)
2003-03-03 20:00:20 AM
20:00:20.000000 AM 03-03-2000
*/
i= MY_MAX((uint) format_position[0], (uint) format_position[1]);
set_if_bigger(i, (uint) format_position[2]);
allow_space= ((1 << i) | (1 << format_position[6]));
allow_space&= (1 | 2 | 4 | 8 | 64);
not_zero_date= 0;
for (i = start_loop;
i < MAX_DATE_PARTS-1 && str != end &&
my_isdigit(&my_charset_latin1,*str);
i++)
{
const char *start= str;
ulong tmp_value= (uint) (uchar) (*str++ - '0');
/*
Internal format means no delimiters; every field has a fixed
width. Otherwise, we scan until we find a delimiter and discard
leading zeroes -- except for the microsecond part, where leading
zeroes are significant, and where we never process more than six
digits.
*/
my_bool scan_until_delim= !is_internal_format &&
((i != format_position[6]));
while (str != end && my_isdigit(&my_charset_latin1,str[0]) &&
(scan_until_delim || --field_length))
{
tmp_value=tmp_value*10 + (ulong) (uchar) (*str - '0');
str++;
}
date_len[i]= (uint) (str - start);
if (tmp_value > 999999) /* Impossible date part */
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type= MYSQL_TIMESTAMP_NONE;
DBUG_RETURN(1);
}
date[i]=tmp_value;
not_zero_date|= tmp_value;
/* Length of next field */
field_length= format_position[i+1] == 0 ? 4 : 2;
if ((last_field_pos= str) == end)
{
i++; /* Register last found part */
break;
}
/* Allow a 'T' after day to allow CCYYMMDDT type of fields */
if (i == format_position[2] && *str == 'T')
{
str++; /* ISO8601: CCYYMMDDThhmmss */
continue;
}
if (i == format_position[5]) /* Seconds */
{
if (*str == '.') /* Followed by part seconds */
{
str++;
/*
Shift last_field_pos, so '2001-01-01 00:00:00.'
is treated as a valid value
*/
last_field_pos= str;
field_length= 6; /* 6 digits */
}
else if (my_isdigit(&my_charset_latin1,str[0]))
{
/*
We do not see a decimal point which would have indicated a
fractional second part in further read. So we skip the further
processing of digits.
*/
i++;
break;
}
continue;
}
while (str != end &&
(my_ispunct(&my_charset_latin1,*str) ||
my_isspace(&my_charset_latin1,*str)))
{
if (my_isspace(&my_charset_latin1,*str))
{
if (!(allow_space & (1 << i)))
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type= MYSQL_TIMESTAMP_NONE;
DBUG_RETURN(1);
}
found_space= 1;
}
str++;
found_delimitier= 1; /* Should be a 'normal' date */
}
/* Check if next position is AM/PM */
if (i == format_position[6]) /* Seconds, time for AM/PM */
{
i++; /* Skip AM/PM part */
if (format_position[7] != 255) /* If using AM/PM */
{
if (str+2 <= end && (str[1] == 'M' || str[1] == 'm'))
{
if (str[0] == 'p' || str[0] == 'P')
add_hours= 12;
else if (str[0] != 'a' || str[0] != 'A')
continue; /* Not AM/PM */
str+= 2; /* Skip AM/PM */
/* Skip space after AM/PM */
while (str != end && my_isspace(&my_charset_latin1,*str))
str++;
}
}
}
last_field_pos= str;
}
if (found_delimitier && !found_space && (flags & TIME_DATETIME_ONLY))
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type= MYSQL_TIMESTAMP_NONE;
DBUG_RETURN(1); /* Can't be a datetime */
}
str= last_field_pos;
number_of_fields= i - start_loop;
while (i < MAX_DATE_PARTS)
{
date_len[i]= 0;
date[i++]= 0;
}
if (!is_internal_format)
{
year_length= date_len[(uint) format_position[0]];
if (!year_length) /* Year must be specified */
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type= MYSQL_TIMESTAMP_NONE;
DBUG_RETURN(1);
}
l_time->year= date[(uint) format_position[0]];
l_time->month= date[(uint) format_position[1]];
l_time->day= date[(uint) format_position[2]];
l_time->hour= date[(uint) format_position[3]];
l_time->minute= date[(uint) format_position[4]];
l_time->second= date[(uint) format_position[5]];
frac_pos= (uint) format_position[6];
frac_len= date_len[frac_pos];
status->fractional_digits= frac_len;
if (frac_len < 6)
date[frac_pos]*= (uint) log_10_int[DATETIME_MAX_DECIMALS - frac_len];
l_time->second_part= date[frac_pos];
if (format_position[7] != (uchar) 255)
{
if (l_time->hour > 12)
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
goto err;
}
l_time->hour= l_time->hour%12 + add_hours;
}
}
else
{
l_time->year= date[0];
l_time->month= date[1];
l_time->day= date[2];
l_time->hour= date[3];
l_time->minute= date[4];
l_time->second= date[5];
if (date_len[6] < 6)
date[6]*= (uint) log_10_int[DATETIME_MAX_DECIMALS - date_len[6]];
l_time->second_part=date[6];
status->fractional_digits= date_len[6];
}
l_time->neg= 0;
if (year_length == 2 && not_zero_date)
l_time->year+= (l_time->year < YY_PART_YEAR ? 2000 : 1900);
/*
Set time_type before check_datetime_range(),
as the latter relies on initialized time_type value.
*/
l_time->time_type= (number_of_fields <= 3 ?
MYSQL_TIMESTAMP_DATE : MYSQL_TIMESTAMP_DATETIME);
if (number_of_fields < 3 || check_datetime_range(l_time))
{
/* Only give warning for a zero date if there is some garbage after */
if (!not_zero_date) /* If zero date */
{
for (; str != end ; str++)
{
if (!my_isspace(&my_charset_latin1, *str))
{
not_zero_date= 1; /* Give warning */
break;
}
}
}
status->warnings|= not_zero_date ? MYSQL_TIME_WARN_TRUNCATED :
MYSQL_TIME_WARN_ZERO_DATE;
goto err;
}
if (check_date(l_time, not_zero_date != 0, flags, &status->warnings))
goto err;
/* Scan all digits left after microseconds */
if (status->fractional_digits == 6 && str != end)
{
if (my_isdigit(&my_charset_latin1, *str))
{
/*
We don't need the exact nanoseconds value.
Knowing the first digit is enough for rounding.
*/
status->nanoseconds= 100 * (int) (*str++ - '0');
for (; str != end && my_isdigit(&my_charset_latin1, *str); str++)
{ }
}
}
for (; str != end ; str++)
{
if (!my_isspace(&my_charset_latin1,*str))
{
status->warnings= MYSQL_TIME_WARN_TRUNCATED;
break;
}
}
DBUG_RETURN(0);
err:
set_zero_time(l_time, MYSQL_TIMESTAMP_ERROR);
DBUG_RETURN(1);
}
/*
Convert a time string to a MYSQL_TIME struct.
SYNOPSIS
str_to_time()
str A string in full TIMESTAMP format or
[-] DAYS [H]H:MM:SS, [H]H:MM:SS, [M]M:SS, [H]HMMSS,
[M]MSS or [S]S
There may be an optional [.second_part] after seconds
length Length of str
l_time Store result here
status Conversion status
status.warning is set to:
MYSQL_TIME_WARN_TRUNCATED flag if the input string
was cut during conversion, and/or
MYSQL_TIME_WARN_OUT_OF_RANGE flag, if the value is out of range.
NOTES
Because of the extra days argument, this function can only
work with times where the time arguments are in the above order.
RETURN
0 ok
1 error
*/
my_bool str_to_time(const char *str, size_t length, MYSQL_TIME *l_time,
MYSQL_TIME_STATUS *status)
{
ulong date[5];
ulonglong value;
const char *end=str+length, *end_of_days;
my_bool found_days,found_hours;
uint state;
my_time_status_init(status);
l_time->neg=0;
for (; str != end && my_isspace(&my_charset_latin1,*str) ; str++)
length--;
if (str != end && *str == '-')
{
l_time->neg=1;
str++;
length--;
}
if (str == end)
return 1;
/* Check first if this is a full TIMESTAMP */
if (length >= 12)
{ /* Probably full timestamp */
(void) str_to_datetime(str, length, l_time,
(TIME_FUZZY_DATE | TIME_DATETIME_ONLY), status);
if (l_time->time_type >= MYSQL_TIMESTAMP_ERROR)
return l_time->time_type == MYSQL_TIMESTAMP_ERROR;
my_time_status_init(status);
}
/* Not a timestamp. Try to get this as a DAYS_TO_SECOND string */
for (value=0; str != end && my_isdigit(&my_charset_latin1,*str) ; str++)
value=value*10L + (long) (*str - '0');
if (value > UINT_MAX)
return 1;
/* Skip all space after 'days' */
end_of_days= str;
for (; str != end && my_isspace(&my_charset_latin1, str[0]) ; str++)
;
state= 0;
found_days=found_hours=0;
if ((uint) (end-str) > 1 && str != end_of_days &&
my_isdigit(&my_charset_latin1, *str))
{ /* Found days part */
date[0]= (ulong) value;
state= 1; /* Assume next is hours */
found_days= 1;
}
else if ((end-str) > 1 && *str == time_separator &&
my_isdigit(&my_charset_latin1, str[1]))
{
date[0]= 0; /* Assume we found hours */
date[1]= (ulong) value;
state=2;
found_hours=1;
str++; /* skip ':' */
}
else
{
/* String given as one number; assume HHMMSS format */
date[0]= 0;
date[1]= (ulong) (value/10000);
date[2]= (ulong) (value/100 % 100);
date[3]= (ulong) (value % 100);
state=4;
goto fractional;
}
/* Read hours, minutes and seconds */
for (;;)
{
for (value=0; str != end && my_isdigit(&my_charset_latin1,*str) ; str++)
value=value*10L + (long) (*str - '0');
date[state++]= (ulong) value;
if (state == 4 || (end-str) < 2 || *str != time_separator ||
!my_isdigit(&my_charset_latin1,str[1]))
break;
str++; /* Skip time_separator (':') */
}
if (state != 4)
{ /* Not HH:MM:SS */
/* Fix the date to assume that seconds was given */
if (!found_hours && !found_days)
{
size_t len= sizeof(long) * (state - 1);
memmove((uchar*) (date+4) - len, (uchar*) (date+state) - len, len);
memset(date, 0, sizeof(long)*(4-state));
}
else
memset((date+state), 0, sizeof(long)*(4-state));
}
fractional:
/* Get fractional second part */
if ((end-str) >= 2 && *str == '.' && my_isdigit(&my_charset_latin1,str[1]))
{
int field_length= 5;
str++; value=(uint) (uchar) (*str - '0');
while (++str != end && my_isdigit(&my_charset_latin1, *str))
{
if (field_length-- > 0)
value= value*10 + (uint) (uchar) (*str - '0');
}
if (field_length >= 0)
{
status->fractional_digits= DATETIME_MAX_DECIMALS - field_length;
if (field_length > 0)
value*= (long) log_10_int[field_length];
}
else
{
/* Scan digits left after microseconds */
status->fractional_digits= 6;
status->nanoseconds= 100 * (int) (str[-1] - '0');
for ( ; str != end && my_isdigit(&my_charset_latin1, *str); str++)
{ }
}
date[4]= (ulong) value;
}
else if ((end - str) == 1 && *str == '.')
{
str++;
date[4]= 0;
}
else
date[4]=0;
/* Check for exponent part: E<gigit> | E<sign><digit> */
/* (may occur as result of %g formatting of time value) */
if ((end - str) > 1 &&
(*str == 'e' || *str == 'E') &&
(my_isdigit(&my_charset_latin1, str[1]) ||
((str[1] == '-' || str[1] == '+') &&
(end - str) > 2 &&
my_isdigit(&my_charset_latin1, str[2]))))
return 1;
if (internal_format_positions[7] != 255)
{
/* Read a possible AM/PM */
while (str != end && my_isspace(&my_charset_latin1, *str))
str++;
if (str+2 <= end && (str[1] == 'M' || str[1] == 'm'))
{
if (str[0] == 'p' || str[0] == 'P')
{
str+= 2;
date[1]= date[1]%12 + 12;
}
else if (str[0] == 'a' || str[0] == 'A')
str+=2;
}
}
/* Integer overflow checks */
if (date[0] > UINT_MAX || date[1] > UINT_MAX ||
date[2] > UINT_MAX || date[3] > UINT_MAX ||
date[4] > UINT_MAX)
return 1;
l_time->year= 0; /* For protocol::store_time */
l_time->month= 0;
l_time->day= 0;
l_time->hour= date[1] + date[0] * 24; /* Mix days and hours */
l_time->minute= date[2];
l_time->second= date[3];
l_time->second_part= date[4];
l_time->time_type= MYSQL_TIMESTAMP_TIME;
if (check_time_mmssff_range(l_time))
{
status->warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
return TRUE;
}
/* Adjust the value into supported MYSQL_TIME range */
adjust_time_range(l_time, &status->warnings);
/* Check if there is garbage at end of the MYSQL_TIME specification */
if (str != end)
{
do
{
if (!my_isspace(&my_charset_latin1,*str))
{
status->warnings|= MYSQL_TIME_WARN_TRUNCATED;
break;
}
} while (++str != end);
}
return 0;
}
/**
Convert number to TIME
@param nr Number to convert.
@param OUT ltime Variable to convert to.
@param OUT warnings Warning vector.
@retval false OK
@retval true No. is out of range
*/
my_bool
number_to_time(longlong nr, MYSQL_TIME *ltime, int *warnings)
{
if (nr > TIME_MAX_VALUE)
{
/* For huge numbers try full DATETIME, like str_to_time does. */
if (nr >= 10000000000LL) /* '0001-00-00 00-00-00' */
{
int warnings_backup= *warnings;
if (number_to_datetime(nr, ltime, 0, warnings) != -1LL)
return FALSE;
*warnings= warnings_backup;
}
set_max_time(ltime, 0);
*warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
return TRUE;
}
else if (nr < -TIME_MAX_VALUE)
{
set_max_time(ltime, 1);
*warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
return TRUE;
}
if ((ltime->neg= (nr < 0)))
nr= -nr;
if (nr % 100 >= 60 || nr / 100 % 100 >= 60) /* Check hours and minutes */
{
set_zero_time(ltime, MYSQL_TIMESTAMP_TIME);
*warnings|= MYSQL_TIME_WARN_OUT_OF_RANGE;
return TRUE;
}
ltime->time_type= MYSQL_TIMESTAMP_TIME;
ltime->year= ltime->month= ltime->day= 0;
TIME_set_hhmmss(ltime, (uint)nr);
ltime->second_part= 0;
return FALSE;
}
/**
Adjust 'time' value to lie in the MYSQL_TIME range.
If the time value lies outside of the range [-838:59:59, 838:59:59],
set it to the closest endpoint of the range and set
MYSQL_TIME_WARN_OUT_OF_RANGE flag in the 'warning' variable.
@param time pointer to MYSQL_TIME value
@param warning set MYSQL_TIME_WARN_OUT_OF_RANGE flag if the value is out of range
*/
void adjust_time_range(struct st_mysql_time *my_time, int *warning)
{
DBUG_ASSERT(!check_time_mmssff_range(my_time));
if (check_time_range_quick(my_time))
{
my_time->day= my_time->second_part= 0;
set_max_hhmmss(my_time);
*warning|= MYSQL_TIME_WARN_OUT_OF_RANGE;
}
}
/*
Prepare offset of system time zone from UTC for my_system_gmt_sec() func.
SYNOPSIS
my_init_time()
*/
void my_init_time(void)
{
time_t seconds;
struct tm *l_time,tm_tmp;
MYSQL_TIME my_time;
my_bool not_used;
seconds= (time_t) time((time_t*) 0);
localtime_r(&seconds,&tm_tmp);
l_time= &tm_tmp;
my_time_zone= 3600; /* Comp. for -3600 in my_gmt_sec */
my_time.year= (uint) l_time->tm_year+1900;
my_time.month= (uint) l_time->tm_mon+1;
my_time.day= (uint) l_time->tm_mday;
my_time.hour= (uint) l_time->tm_hour;
my_time.minute= (uint) l_time->tm_min;
my_time.second= (uint) l_time->tm_sec;
my_time.time_type= MYSQL_TIMESTAMP_DATETIME;
my_time.neg= 0;
my_time.second_part= 0;
my_system_gmt_sec(&my_time, &my_time_zone, ¬_used); /* Init my_time_zone */
}
/*
Handle 2 digit year conversions
SYNOPSIS
year_2000_handling()
year 2 digit year
RETURN
Year between 1970-2069
*/
uint year_2000_handling(uint year)
{
if ((year=year+1900) < 1900+YY_PART_YEAR)
year+=100;
return year;
}
/*
Calculate nr of day since year 0 in new date-system (from 1615)
SYNOPSIS
calc_daynr()
year Year (exact 4 digit year, no year conversions)
month Month
day Day
NOTES: 0000-00-00 is a valid date, and will return 0
RETURN
Days since 0000-00-00
*/
long calc_daynr(uint year,uint month,uint day)
{
long delsum;
int temp;
int y= year; /* may be < 0 temporarily */
DBUG_ENTER("calc_daynr");
if (y == 0 && month == 0)
DBUG_RETURN(0); /* Skip errors */
/* Cast to int to be able to handle month == 0 */
delsum= (long) (365 * y + 31 *((int) month - 1) + (int) day);
if (month <= 2)
y--;
else
delsum-= (long) ((int) month * 4 + 23) / 10;
temp=(int) ((y/100+1)*3)/4;
DBUG_PRINT("exit",("year: %d month: %d day: %d -> daynr: %ld",
y+(month <= 2),month,day,delsum+y/4-temp));
DBUG_ASSERT(delsum+(int) y/4-temp >= 0);
DBUG_RETURN(delsum+(int) y/4-temp);
} /* calc_daynr */
/*
Convert time in MYSQL_TIME representation in system time zone to its
my_time_t form (number of seconds in UTC since begginning of Unix Epoch).
SYNOPSIS
my_system_gmt_sec()
t - time value to be converted
my_timezone - pointer to long where offset of system time zone
from UTC will be stored for caching