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5a759d31f7
Benefits of this patch: - Removed a lot of calls to strlen(), especially for field_string - Strings generated by parser are now const strings, less chance of accidently changing a string - Removed a lot of calls with LEX_STRING as parameter (changed to pointer) - More uniform code - Item::name_length was not kept up to date. Now fixed - Several bugs found and fixed (Access to null pointers, access of freed memory, wrong arguments to printf like functions) - Removed a lot of casts from (const char*) to (char*) Changes: - This caused some ABI changes - lex_string_set now uses LEX_CSTRING - Some fucntions are now taking const char* instead of char* - Create_field::change and after changed to LEX_CSTRING - handler::connect_string, comment and engine_name() changed to LEX_CSTRING - Checked printf() related calls to find bugs. Found and fixed several errors in old code. - A lot of changes from LEX_STRING to LEX_CSTRING, especially related to parsing and events. - Some changes from LEX_STRING and LEX_STRING & to LEX_CSTRING* - Some changes for char* to const char* - Added printf argument checking for my_snprintf() - Introduced null_clex_str, star_clex_string, temp_lex_str to simplify code - Added item_empty_name and item_used_name to be able to distingush between items that was given an empty name and items that was not given a name This is used in sql_yacc.yy to know when to give an item a name. - select table_name."*' is not anymore same as table_name.* - removed not used function Item::rename() - Added comparision of item->name_length before some calls to my_strcasecmp() to speed up comparison - Moved Item_sp_variable::make_field() from item.h to item.cc - Some minimal code changes to avoid copying to const char * - Fixed wrong error message in wsrep_mysql_parse() - Fixed wrong code in find_field_in_natural_join() where real_item() was set when it shouldn't - ER_ERROR_ON_RENAME was used with extra arguments. - Removed some (wrong) ER_OUTOFMEMORY, as alloc_root will already give the error. TODO: - Check possible unsafe casts in plugin/auth_examples/qa_auth_interface.c - Change code to not modify LEX_CSTRING for database name (as part of lower_case_table_names)
258 lines
8.7 KiB
C
258 lines
8.7 KiB
C
/*
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Copyright (c) 2004, 2011, Oracle and/or its affiliates.
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Copyright (c) 2017, Monty Program Ab.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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/*
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This is a private header of sql-common library, containing
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declarations for my_time.c
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*/
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#ifndef _my_time_h_
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#define _my_time_h_
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#include "my_global.h"
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#include "mysql_time.h"
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#include "my_decimal_limits.h"
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C_MODE_START
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extern ulonglong log_10_int[20];
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extern uchar days_in_month[];
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#define MY_TIME_T_MAX LONG_MAX
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#define MY_TIME_T_MIN LONG_MIN
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/* Time handling defaults */
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#define TIMESTAMP_MAX_YEAR 2038
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#define TIMESTAMP_MIN_YEAR (1900 + YY_PART_YEAR - 1)
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#define TIMESTAMP_MAX_VALUE INT_MAX32
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#define TIMESTAMP_MIN_VALUE 0
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/* two-digit years < this are 20..; >= this are 19.. */
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#define YY_PART_YEAR 70
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/*
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check for valid times only if the range of time_t is greater than
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the range of my_time_t
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*/
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#if SIZEOF_TIME_T > 4 || defined(TIME_T_UNSIGNED)
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# define IS_TIME_T_VALID_FOR_TIMESTAMP(x) \
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((x) <= TIMESTAMP_MAX_VALUE && \
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(x) >= TIMESTAMP_MIN_VALUE)
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#else
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# define IS_TIME_T_VALID_FOR_TIMESTAMP(x) \
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((x) >= TIMESTAMP_MIN_VALUE)
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#endif
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/* Flags to str_to_datetime */
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/*
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TIME_FUZZY_DATES is used for the result will only be used for comparison
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purposes. Conversion is as relaxed as possible.
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*/
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#define TIME_FUZZY_DATES 1U
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#define TIME_DATETIME_ONLY 2U
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#define TIME_TIME_ONLY 4U
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#define TIME_NO_ZERO_IN_DATE (1UL << 23) /* == MODE_NO_ZERO_IN_DATE */
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#define TIME_NO_ZERO_DATE (1UL << 24) /* == MODE_NO_ZERO_DATE */
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#define TIME_INVALID_DATES (1UL << 25) /* == MODE_INVALID_DATES */
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#define MYSQL_TIME_WARN_TRUNCATED 1U
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#define MYSQL_TIME_WARN_OUT_OF_RANGE 2U
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#define MYSQL_TIME_NOTE_TRUNCATED 16U
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#define MYSQL_TIME_WARN_WARNINGS (MYSQL_TIME_WARN_TRUNCATED|MYSQL_TIME_WARN_OUT_OF_RANGE)
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#define MYSQL_TIME_WARN_NOTES (MYSQL_TIME_NOTE_TRUNCATED)
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#define MYSQL_TIME_WARN_HAVE_WARNINGS(x) MY_TEST((x) & MYSQL_TIME_WARN_WARNINGS)
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#define MYSQL_TIME_WARN_HAVE_NOTES(x) MY_TEST((x) & MYSQL_TIME_WARN_NOTES)
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/* Usefull constants */
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#define SECONDS_IN_24H 86400L
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/* Limits for the TIME data type */
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#define TIME_MAX_HOUR 838
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#define TIME_MAX_MINUTE 59
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#define TIME_MAX_SECOND 59
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#define TIME_MAX_SECOND_PART 999999
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#define TIME_SECOND_PART_FACTOR (TIME_MAX_SECOND_PART+1)
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#define TIME_SECOND_PART_DIGITS 6
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#define TIME_MAX_VALUE (TIME_MAX_HOUR*10000 + TIME_MAX_MINUTE*100 + TIME_MAX_SECOND)
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#define TIME_MAX_VALUE_SECONDS (TIME_MAX_HOUR * 3600L + \
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TIME_MAX_MINUTE * 60L + TIME_MAX_SECOND)
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/*
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Structure to return status from
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str_to_datetime(), str_to_time().
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*/
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typedef struct st_mysql_time_status
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{
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int warnings;
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uint precision;
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} MYSQL_TIME_STATUS;
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static inline void my_time_status_init(MYSQL_TIME_STATUS *status)
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{
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status->warnings= status->precision= 0;
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}
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my_bool check_date(const MYSQL_TIME *ltime, my_bool not_zero_date,
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ulonglong flags, int *was_cut);
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my_bool str_to_time(const char *str, uint length, MYSQL_TIME *l_time,
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ulonglong flag, MYSQL_TIME_STATUS *status);
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my_bool str_to_datetime(const char *str, uint length, MYSQL_TIME *l_time,
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ulonglong flags, MYSQL_TIME_STATUS *status);
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longlong number_to_datetime(longlong nr, ulong sec_part, MYSQL_TIME *time_res,
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ulonglong flags, int *was_cut);
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static inline
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longlong double_to_datetime(double nr, MYSQL_TIME *ltime, uint flags, int *cut)
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{
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if (nr < 0 || nr > LONGLONG_MAX)
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nr= (double)LONGLONG_MAX;
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return number_to_datetime((longlong) floor(nr),
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(ulong)((nr-floor(nr))*TIME_SECOND_PART_FACTOR),
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ltime, flags, cut);
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}
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int number_to_time(my_bool neg, ulonglong nr, ulong sec_part,
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MYSQL_TIME *ltime, int *was_cut);
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ulonglong TIME_to_ulonglong_datetime(const MYSQL_TIME *);
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ulonglong TIME_to_ulonglong_date(const MYSQL_TIME *);
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ulonglong TIME_to_ulonglong_time(const MYSQL_TIME *);
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ulonglong TIME_to_ulonglong(const MYSQL_TIME *);
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double TIME_to_double(const MYSQL_TIME *my_time);
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longlong pack_time(const MYSQL_TIME *my_time);
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MYSQL_TIME *unpack_time(longlong packed, MYSQL_TIME *my_time);
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int check_time_range(struct st_mysql_time *my_time, uint dec, int *warning);
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my_bool check_datetime_range(const MYSQL_TIME *ltime);
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long calc_daynr(uint year,uint month,uint day);
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uint calc_days_in_year(uint year);
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uint year_2000_handling(uint year);
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void my_init_time(void);
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/*
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Function to check sanity of a TIMESTAMP value
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DESCRIPTION
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Check if a given MYSQL_TIME value fits in TIMESTAMP range.
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This function doesn't make precise check, but rather a rough
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estimate.
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RETURN VALUES
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TRUE The value seems sane
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FALSE The MYSQL_TIME value is definitely out of range
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*/
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static inline my_bool validate_timestamp_range(const MYSQL_TIME *t)
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{
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if ((t->year > TIMESTAMP_MAX_YEAR || t->year < TIMESTAMP_MIN_YEAR) ||
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(t->year == TIMESTAMP_MAX_YEAR && (t->month > 1 || t->day > 19)) ||
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(t->year == TIMESTAMP_MIN_YEAR && (t->month < 12 || t->day < 31)))
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return FALSE;
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return TRUE;
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}
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/* Can't include mysqld_error.h, it needs mysys to build, thus hardcode 2 error values here. */
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#ifndef ER_WARN_DATA_OUT_OF_RANGE
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#define ER_WARN_DATA_OUT_OF_RANGE 1264
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#define ER_WARN_INVALID_TIMESTAMP 1299
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#endif
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my_time_t
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my_system_gmt_sec(const MYSQL_TIME *t, long *my_timezone, uint *error_code);
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void set_zero_time(MYSQL_TIME *tm, enum enum_mysql_timestamp_type time_type);
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/*
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Required buffer length for my_time_to_str, my_date_to_str,
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my_datetime_to_str and TIME_to_string functions. Note, that the
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caller is still responsible to check that given TIME structure
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has values in valid ranges, otherwise size of the buffer could
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be not enough. We also rely on the fact that even wrong values
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sent using binary protocol fit in this buffer.
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*/
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#define MAX_DATE_STRING_REP_LENGTH 30
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#define AUTO_SEC_PART_DIGITS DECIMAL_NOT_SPECIFIED
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int my_time_to_str(const MYSQL_TIME *l_time, char *to, uint digits);
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int my_date_to_str(const MYSQL_TIME *l_time, char *to);
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int my_datetime_to_str(const MYSQL_TIME *l_time, char *to, uint digits);
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int my_TIME_to_str(const MYSQL_TIME *l_time, char *to, uint digits);
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int my_timeval_to_str(const struct timeval *tm, char *to, uint dec);
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static inline longlong sec_part_shift(longlong second_part, uint digits)
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{
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return second_part / (longlong)log_10_int[TIME_SECOND_PART_DIGITS - digits];
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}
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static inline longlong sec_part_unshift(longlong second_part, uint digits)
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{
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return second_part * (longlong)log_10_int[TIME_SECOND_PART_DIGITS - digits];
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}
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/* Date/time rounding and truncation functions */
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static inline long my_time_fraction_remainder(long nr, uint decimals)
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{
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DBUG_ASSERT(decimals <= TIME_SECOND_PART_DIGITS);
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return nr % (long) log_10_int[TIME_SECOND_PART_DIGITS - decimals];
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}
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static inline void my_time_trunc(MYSQL_TIME *ltime, uint decimals)
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{
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ltime->second_part-= my_time_fraction_remainder(ltime->second_part, decimals);
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}
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static inline void my_timeval_trunc(struct timeval *tv, uint decimals)
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{
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tv->tv_usec-= my_time_fraction_remainder(tv->tv_usec, decimals);
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}
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#define hrtime_to_my_time(X) ((my_time_t)hrtime_to_time(X))
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/*
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Available interval types used in any statement.
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'interval_type' must be sorted so that simple intervals comes first,
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ie year, quarter, month, week, day, hour, etc. The order based on
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interval size is also important and the intervals should be kept in a
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large to smaller order. (get_interval_value() depends on this)
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Note: If you change the order of elements in this enum you should fix
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order of elements in 'interval_type_to_name' and 'interval_names'
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arrays
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See also interval_type_to_name, get_interval_value, interval_names
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*/
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enum interval_type
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{
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INTERVAL_YEAR, INTERVAL_QUARTER, INTERVAL_MONTH, INTERVAL_WEEK, INTERVAL_DAY,
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INTERVAL_HOUR, INTERVAL_MINUTE, INTERVAL_SECOND, INTERVAL_MICROSECOND,
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INTERVAL_YEAR_MONTH, INTERVAL_DAY_HOUR, INTERVAL_DAY_MINUTE,
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INTERVAL_DAY_SECOND, INTERVAL_HOUR_MINUTE, INTERVAL_HOUR_SECOND,
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INTERVAL_MINUTE_SECOND, INTERVAL_DAY_MICROSECOND, INTERVAL_HOUR_MICROSECOND,
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INTERVAL_MINUTE_MICROSECOND, INTERVAL_SECOND_MICROSECOND, INTERVAL_LAST
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};
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C_MODE_END
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#endif /* _my_time_h_ */
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