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my_time.cc
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/* Copyright (c) 2004, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
Without limiting anything contained in the foregoing, this file,
which is part of C Driver for MySQL (Connector/C), is also subject to the
Universal FOSS Exception, version 1.0, a copy of which can be found at
http://oss.oracle.com/licenses/universal-foss-exception.
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, version 2.0, 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 */
/**
@defgroup MY_TIME Mysys time utilities
@ingroup MYSYS
@{
@file mysys/my_time.cc
Implementation of low level time utilities.
*/
/**
@ingroup MY_TIME
@page LOW_LEVEL_FORMATS Low-level memory and disk formats
- @subpage datetime_and_date_low_level_rep
- @subpage time_low_level_rep
*/
#include "my_time.h"
#include <algorithm> // std::max
#include <cassert> // assert
#include <cctype> // std::isspace
#include <climits> // UINT_MAX
#include <cstdio> // std::sprintf
#include <cstring> // std::memset
#include "field_types.h" // enum_field_types
#include "integer_digits.h" // count_digits, write_digits, write_two_digits
#include "my_byteorder.h" // int3store
#include "my_systime.h" // localtime_r
#include "myisampack.h" // mi_int2store
#include "template_utils.h" // pointer_cast
const 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";
static constexpr const char time_separator = ':';
/** Day number with 1970-01-01 as base. */
static constexpr ulong const days_at_timestart = 719528;
const 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 my_time_t my_time_zone = 0;
// Right-shift of a negative value is implementation-defined
// Assert that we have arithmetic shift of negative numbers
static_assert((-2 >> 1) == -1, "Right shift of negative numbers is arithmetic");
static longlong my_packed_time_get_int_part(longlong i) { return (i >> 24); }
static longlong my_packed_time_make(longlong i, longlong f) {
assert(std::abs(f) <= 0xffffffLL);
return (static_cast<ulonglong>(i) << 24) + f;
}
static longlong my_packed_time_make_int(longlong i) {
return (static_cast<ulonglong>(i) << 24);
}
// The behavior of <cctype> functions is undefined if the argument's value is
// neither representable as unsigned char nor equal to EOF. To use these
// functions safely with plain chars, cast to unsigned char.
static inline int isspace_char(char ch) {
return std::isspace(static_cast<unsigned char>(ch));
}
static inline int isdigit_char(char ch) {
return std::isdigit(static_cast<unsigned char>(ch));
}
static inline int ispunct_char(char ch) {
return std::ispunct(static_cast<unsigned char>(ch));
}
/**
Calc days in one year.
@note Works with both two and four digit years.
@return number of days in that year
*/
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 [out] tm 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, 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] my_time Date to check.
@param[in] not_zero_date my_time 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.
@retval false OK
@retval true error
*/
bool check_date(const MYSQL_TIME &my_time, 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)) &&
(my_time.month == 0 || my_time.day == 0)) {
*was_cut = MYSQL_TIME_WARN_ZERO_IN_DATE;
return true;
}
if ((!(flags & TIME_INVALID_DATES) && my_time.month &&
my_time.day > days_in_month[my_time.month - 1] &&
(my_time.month != 2 || calc_days_in_year(my_time.year) != 366 ||
my_time.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 can be adjusted to make the time value valid.
@param my_time Time value.
@retval true if the value cannot be made valid.
@retval false if the value is already valid or can be adjusted to
become valid.
*/
bool check_time_mmssff_range(const MYSQL_TIME &my_time) {
return my_time.minute >= 60 || my_time.second >= 60 ||
my_time.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 my_time Time value.
@returns Test result.
@retval false if value is Ok.
@retval true if value is out of range.
*/
bool check_time_range_quick(const MYSQL_TIME &my_time) {
const longlong hour =
static_cast<longlong>(my_time.hour) + 24LL * my_time.day;
/* The input value should not be fatally bad */
assert(!check_time_mmssff_range(my_time));
return !(hour <= TIME_MAX_HOUR &&
(hour != TIME_MAX_HOUR || my_time.minute != TIME_MAX_MINUTE ||
my_time.second != TIME_MAX_SECOND || !my_time.second_part));
}
/**
Check datetime, date, or normalized time (i.e. time without days) range.
@param my_time Datetime value.
@retval false on success
@retval true on error
*/
bool check_datetime_range(const MYSQL_TIME &my_time) {
/*
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 my_time.year > 9999U || my_time.month > 12U || my_time.day > 31U ||
my_time.minute > 59U || my_time.second > 59U ||
my_time.second_part > 999999U ||
(my_time.hour >
(my_time.time_type == MYSQL_TIMESTAMP_TIME ? TIME_MAX_HOUR : 23U));
}
#define MAX_DATE_PARTS 8
/**
Parses a time zone displacement string on the form `{+-}HH:MM`, converting
to seconds.
@param[in] str Time zone displacement string.
@param[in] length Length of said string.
@param[out] result Calculated displacement in seconds.
@retval false Ok.
@retval true Not a valid time zone displacement string.
*/
bool time_zone_displacement_to_seconds(const char *str, size_t length,
int *result) {
if (length < 6) return true;
const int sign = str[0] == '+' ? 1 : (str[0] == '-' ? -1 : 0);
if (sign == 0) return true;
if (!(std::isdigit(str[1]) && std::isdigit(str[2]))) return true;
const int hours = (str[1] - '0') * 10 + str[2] - '0';
if (str[3] != ':') return true;
if (!(std::isdigit(str[4]) && std::isdigit(str[5]))) return true;
const int minutes = (str[4] - '0') * 10 + str[5] - '0';
if (minutes >= MINS_PER_HOUR) return true;
const int seconds = hours * SECS_PER_HOUR + minutes * SECS_PER_MIN;
if (seconds > MAX_TIME_ZONE_HOURS * SECS_PER_HOUR) return true;
// The SQL standard forbids -00:00.
if (sign == -1 && hours == 0 && minutes == 0) return true;
for (size_t i = 6; i < length; ++i)
if (!std::isspace(str[i])) return true;
*result = seconds * sign;
return false;
}
/**
Convert a timestamp string to a MYSQL_TIME value.
DESCRIPTION
At least the following formats are recognized (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.
The datetime value may be followed by a time zone displacement +/-HH:MM.
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
flags is a bit field with the following possible values:
TIME_FUZZY_DATE
TIME_DATETIME_ONLY
TIME_NO_ZERO_IN_DATE
TIME_NO_ZERO_DATE
TIME_INVALID_DATES
@param str_arg String to parse
@param length Length of string
@param[out] l_time Date is stored here
@param flags Bitfield
TIME_FUZZY_DATE|TIME_DATETIME_ONLY|TIME_NO_ZERO_IN_DATE|TIME_NO_ZERO_DATE|TIME_INVALID_DATES
(described above)
@param status Conversion status and warnings
@retval false Ok
@retval true Error
*/
bool str_to_datetime(const char *const str_arg, std::size_t length,
MYSQL_TIME *l_time, my_time_flags_t flags,
MYSQL_TIME_STATUS *status) {
uint field_length = 0;
uint year_length = 0;
uint digits;
uint number_of_fields;
uint date[MAX_DATE_PARTS];
uint date_len[MAX_DATE_PARTS];
uint start_loop;
ulong not_zero_date;
// Hyphen is mandated after digit sequence 1 and 2, e.g. 2000-12-23, i.e.
// after the year part and after the month part.
constexpr ulong allow_hyphen = (1 << 0) | (1 << 1);
// Colon is mandated after digit sequence 4 and 5, e.g. 2000-12-23 14:44:10,
// after the hour part and after the minutes part.
constexpr ulong allow_colon = (1 << 3) | (1 << 4);
bool is_internal_format = false;
const char *pos;
const char *last_field_pos = nullptr;
const char *end = str_arg + length;
bool found_delimiter = false;
bool found_space = false;
bool found_displacement = false;
uint frac_pos;
uint frac_len;
int displacement = 0;
const char *str = str_arg;
assert(status->warnings == 0 && status->fractional_digits == 0 &&
status->nanoseconds == 0);
/* Skip space at start */
for (; str != end && isspace_char(*str); str++)
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str);
if (str == end || !isdigit_char(*str)) {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
is_internal_format = false;
/* This has to be changed if want to activate different timestamp formats */
/*
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 && (isdigit_char(*pos) || *pos == 'T'); pos++)
;
digits = static_cast<uint>(pos - str);
start_loop = 0; /* Start of scan loop */
date_len[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 = true;
} else {
field_length = 4;
}
/*
Only allow space in the first "part" of the datetime field and:
- after days, part seconds
2003-03-03 20:00:20.44
*/
const ulong allow_space = ((1 << 2) | (1 << 6));
not_zero_date = 0;
uint i;
for (i = start_loop;
i < MAX_DATE_PARTS - 1 && str != end && isdigit_char(*str); i++) {
const char *start = str;
ulong tmp_value = static_cast<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.
*/
const bool scan_until_delim = !is_internal_format && (i != 6);
while (str != end && isdigit_char(str[0]) &&
(scan_until_delim || --field_length)) {
tmp_value =
tmp_value * 10 + static_cast<ulong>(static_cast<uchar>(*str - '0'));
str++;
if (tmp_value > 999999) /* Impossible date part */
{
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
}
date_len[i] = static_cast<uint>(str - start);
date[i] = tmp_value;
not_zero_date |= tmp_value;
/* Length of next field */
field_length = 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 == 2 && *str == 'T') {
str++; /* ISO8601: CCYYMMDDThhmmss */
continue;
}
if (i == 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 (isdigit_char(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;
} else if (str[0] == '+' || str[0] == '-') {
if (!time_zone_displacement_to_seconds(str, end - str, &displacement)) {
found_displacement = true;
str += end - str;
last_field_pos = str;
} else {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
}
continue;
}
if (i == 6 && (str[0] == '+' || str[0] == '-')) {
if (!time_zone_displacement_to_seconds(str, end - str, &displacement)) {
found_displacement = true;
str += end - str;
last_field_pos = str;
} else {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
}
bool one_delim_seen = false;
while (str != end && (ispunct_char(*str) || isspace_char(*str))) {
if (one_delim_seen) {
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str);
}
if (isspace_char(*str)) {
if (!(allow_space & (1 << i))) {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
if (i == 6) {
status->set_deprecation(
MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS, str_arg, end,
str);
}
found_space = true;
if (*str != ' ') {
status->set_deprecation(
MYSQL_TIME_STATUS::DEPRECATION::DP_WRONG_SPACE, str_arg, end,
str);
}
} else if (!((*str == '-' && allow_hyphen & (1 << i)) ||
(*str == ':' && allow_colon & (1 << i))) &&
i != 2) {
if (is_internal_format && year_length == 2 && date_len[0] == 1) {
// skip deprecation the case of year given as 4.12.3, because
// changing it to 4-12-3 would yield a different year (2004-12-03 vs
// 0004-12-03). We will deprecate short years in WL#13603 instead.
} else {
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_WRONG_KIND,
str_arg, end, str, i > 1);
}
} else if (i == 2 && (*str != '.' || !is_internal_format)) {
// Corner case: i == 2 is the position between date and time. Sometimes
// in internal format it will be a period, but we can't flag that
// here. Example: In '10101.5' > date'2021-10-12', the ".5" is accepted
// but discarded silently. Substituting a space here will not parse,
// so we stay silent.
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_WRONG_SPACE,
str_arg, end, str);
}
str++;
one_delim_seen = true;
found_delimiter = true; /* Should be a 'normal' date */
}
/* Check if next position is AM/PM */
if (i == 6) /* Seconds, time for AM/PM */
{
i++; /* Skip AM/PM part */
}
last_field_pos = str;
}
if (found_delimiter) {
if (found_space && i == 3 && str == end) {
// superfluous space at end of date (and no time given)
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str - 1);
} else if (!found_space && (flags & TIME_DATETIME_ONLY)) {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true; /* 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[0];
if (!year_length) /* Year must be specified */
{
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
l_time->year = date[static_cast<uint>(0)];
l_time->month = date[static_cast<uint>(1)];
l_time->day = date[static_cast<uint>(2)];
l_time->hour = date[static_cast<uint>(3)];
l_time->minute = date[static_cast<uint>(4)];
l_time->second = date[static_cast<uint>(5)];
l_time->time_zone_displacement = displacement;
frac_pos = static_cast<uint>(6);
frac_len = date_len[frac_pos];
status->fractional_digits = frac_len;
if (frac_len < 6)
date[frac_pos] *=
static_cast<uint>(log_10_int[DATETIME_MAX_DECIMALS - frac_len]);
l_time->second_part = date[frac_pos];
} 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] *=
static_cast<uint>(log_10_int[DATETIME_MAX_DECIMALS - date_len[6]]);
l_time->second_part = date[6];
l_time->time_zone_displacement = displacement;
status->fractional_digits = date_len[6];
}
l_time->neg = false;
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
: (found_displacement ? MYSQL_TIMESTAMP_DATETIME_TZ
: 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 (!isspace_char(*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 (isdigit_char(*str)) {
/*
We don't need the exact nanoseconds value.
Knowing the first digit is enough for rounding.
*/
status->nanoseconds = 100 * (*str++ - '0');
for (; str != end && isdigit_char(*str); str++) {
}
}
}
if (str != end && (str[0] == '+' || str[0] == '-')) {
if (time_zone_displacement_to_seconds(str, end - str, &displacement)) {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
l_time->time_type = MYSQL_TIMESTAMP_DATETIME_TZ;
l_time->time_zone_displacement = displacement;
return false;
}
for (; str != end; str++) {
if (!isspace_char(*str)) {
status->warnings = MYSQL_TIME_WARN_TRUNCATED;
break;
}
// superfluous space at end
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str);
}
return false;
err:
set_zero_time(l_time, MYSQL_TIMESTAMP_ERROR);
return true;
}
/**
Convert a time string to a MYSQL_TIME struct.
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.
@note
Because of the extra days argument, this function can only
work with times where the time arguments are in the above order.
@param 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
@param length Length of str
@param[out] l_time Store result here
@param[out] status Conversion status, including warnings.
@param flags Optional flags to control conversion
@retval false Ok
@retval true Error
*/
bool str_to_time(const char *str, std::size_t length, MYSQL_TIME *l_time,
MYSQL_TIME_STATUS *status, my_time_flags_t flags) {
ulong date[5];
ulonglong value;
const char *end = str + length;
const char *end_of_days;
bool found_days;
bool found_hours;
uint state;
const char *start;
bool seen_colon = false;
const char *str_arg = str;
assert(status->warnings == 0 && status->fractional_digits == 0 &&
status->nanoseconds == 0);
l_time->time_type = MYSQL_TIMESTAMP_NONE;
l_time->neg = false;
for (; str != end && isspace_char(*str); str++) {
length--;
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str);
}
if (str != end && *str == '-') {
l_time->neg = true;
str++;
length--;
}
if (str == end) return true;
// Remember beginning of first non-space/- char.
start = str;
/* Check first if this is a full TIMESTAMP */
if (length >= 12) { /* Probably full timestamp */
MYSQL_TIME_STATUS tmpstatus;
(void)str_to_datetime(str, length, l_time,
(TIME_FUZZY_DATE | TIME_DATETIME_ONLY), &tmpstatus);
if (l_time->time_type >= MYSQL_TIMESTAMP_ERROR) {
*status = tmpstatus;
const bool error = l_time->time_type == MYSQL_TIMESTAMP_ERROR;
if (error) status->squelch_deprecation();
return error;
}
assert(status->warnings == 0 && status->fractional_digits == 0 &&
status->nanoseconds == 0);
}
/* Not a timestamp. Try to get this as a DAYS_TO_SECOND string */
for (value = 0; str != end && isdigit_char(*str); str++)
value = value * 10L + static_cast<long>(*str - '0');
if (value > UINT_MAX) return true;
/* Skip all space after 'days' */
end_of_days = str;
int spaces = 0;
for (; str != end && isspace_char(str[0]); str++) spaces++;
if (spaces > 1 || (spaces == 1 && str == end)) {
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, end_of_days);
}
state = 0;
found_days = found_hours = false;
if (static_cast<uint>(end - str) > 1 && str != end_of_days &&
isdigit_char(*str)) { /* Found days part */
date[0] = static_cast<ulong>(value);
state = 1; /* Assume next is hours */
found_days = true;
} else if ((end - str) > 1 && *str == time_separator &&
isdigit_char(str[1])) {
date[0] = 0; /* Assume we found hours */
date[1] = static_cast<ulong>(value);
state = 2;
found_hours = true;
str++; /* skip ':' */
seen_colon = true;
} else {
/* String given as one number; assume HHMMSS format */
date[0] = 0;
date[1] = static_cast<ulong>(value / 10000);
date[2] = static_cast<ulong>(value / 100 % 100);
date[3] = static_cast<ulong>(value % 100);
state = 4;
goto fractional;
}
/* Read hours, minutes and seconds */
for (;;) {
for (value = 0; str != end && isdigit_char(*str); str++)
value = value * 10L + static_cast<long>(*str - '0');
date[state++] = static_cast<ulong>(value);
if (state == 4 || (end - str) < 2 || *str != time_separator ||
!isdigit_char(str[1]))
break;
str++; /* Skip time_separator (':') */
seen_colon = true;
}
if (state != 4) { /* Not HH:MM:SS */
/* Fix the date to assume that seconds was given */
if (!found_hours && !found_days) {
const std::size_t len = sizeof(long) * (state - 1);
memmove(pointer_cast<uchar *>(date + 4) - len,
pointer_cast<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 == '.' && isdigit_char(str[1])) {
int field_length = 5;
str++;
value = static_cast<uint>(static_cast<uchar>(*str - '0'));
while (++str != end && isdigit_char(*str)) {
if (field_length-- > 0)
value = value * 10 + static_cast<uint>(static_cast<uchar>(*str - '0'));
}
if (field_length >= 0) {
status->fractional_digits = DATETIME_MAX_DECIMALS - field_length;
if (field_length > 0)
value *= static_cast<long>(log_10_int[field_length]);
} else {
/* Scan digits left after microseconds */
status->fractional_digits = 6;
status->nanoseconds = 100 * (str[-1] - '0');
for (; str != end && isdigit_char(*str); str++) {
}
}
date[4] = static_cast<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') &&
(isdigit_char(str[1]) || ((str[1] == '-' || str[1] == '+') &&
(end - str) > 2 && isdigit_char(str[2]))))
return true;
/* 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 true;
if (!seen_colon && (flags & TIME_STRICT_COLON)) {
memset(l_time, 0, sizeof(*l_time));
status->warnings |= MYSQL_TIME_WARN_OUT_OF_RANGE;
return true;
}
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;
l_time->time_zone_displacement = 0;
if (check_time_mmssff_range(*l_time)) {
status->warnings |= MYSQL_TIME_WARN_OUT_OF_RANGE;
l_time->time_type = MYSQL_TIMESTAMP_ERROR;
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 (!isspace_char(*str)) {
status->warnings |= MYSQL_TIME_WARN_TRUNCATED;
// No char was actually used in conversion - bad value
if (str == start) {
l_time->time_type = MYSQL_TIMESTAMP_NONE;
return true;
}
break;
}
status->set_deprecation(MYSQL_TIME_STATUS::DEPRECATION::DP_SUPERFLUOUS,
str_arg, end, str);
} while (++str != end);
}
return false;
}
/**
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
*/
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' */
{
const int warnings_backup = *warnings;
if (number_to_datetime(nr, ltime, 0, warnings) != -1LL) return false;
*warnings = warnings_backup;
}
set_max_time(ltime, false);
*warnings |= MYSQL_TIME_WARN_OUT_OF_RANGE;
return true;
}
if (nr < -TIME_MAX_VALUE) {
set_max_time(ltime, true);
*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, static_cast<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[in,out] my_time pointer to MYSQL_TIME value
@param[out] warning set MYSQL_TIME_WARN_OUT_OF_RANGE flag if the value is
out of range
*/
void adjust_time_range(MYSQL_TIME *my_time, int *warning) {
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.
*/
void my_init_time() {
time_t seconds;
struct tm *l_time;
struct tm tm_tmp;