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by Monty Taylor
Import upstream version 2010.03.1347 |
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/* -*- mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; -*-
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* vim:expandtab:shiftwidth=2:tabstop=2:smarttab:
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*
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* Copyright (C) 2008-2009 Sun Microsystems
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*
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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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*
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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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*
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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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/* Functions to handle date and time */
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#include "config.h" |
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#include "drizzled/error.h" |
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#include "drizzled/util/test.h" |
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#include "drizzled/tztime.h" |
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#include "drizzled/session.h" |
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#include "drizzled/time_functions.h" |
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namespace drizzled |
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{
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/* Some functions to calculate dates */
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int calc_weekday(long daynr,bool sunday_first_day_of_week) |
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{
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return ((int) ((daynr + 5L + (sunday_first_day_of_week ? 1L : 0L)) % 7)); |
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}
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uint32_t calc_week(DRIZZLE_TIME *l_time, uint32_t week_behaviour, uint32_t *year) |
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{
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uint32_t days; |
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uint32_t daynr= calc_daynr(l_time->year,l_time->month,l_time->day); |
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uint32_t first_daynr= calc_daynr(l_time->year,1,1); |
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bool monday_first= test(week_behaviour & WEEK_MONDAY_FIRST); |
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bool week_year= test(week_behaviour & WEEK_YEAR); |
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bool first_weekday= test(week_behaviour & WEEK_FIRST_WEEKDAY); |
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uint32_t weekday= calc_weekday(first_daynr, !monday_first); |
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*year=l_time->year; |
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if (l_time->month == 1 && l_time->day <= 7-weekday) |
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{
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if ((!week_year) && ((first_weekday && weekday != 0) || (!first_weekday && weekday >= 4))) |
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return 0; |
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week_year= 1; |
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(*year)--; |
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first_daynr-= (days=calc_days_in_year(*year)); |
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weekday= (weekday + 53*7- days) % 7; |
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}
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if ((first_weekday && weekday != 0) || |
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(!first_weekday && weekday >= 4)) |
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days= daynr - (first_daynr+ (7-weekday)); |
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else
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days= daynr - (first_daynr - weekday); |
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if (week_year && days >= 52*7) |
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{
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weekday= (weekday + calc_days_in_year(*year)) % 7; |
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if ((!first_weekday && weekday < 4) || (first_weekday && weekday == 0)) |
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{
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(*year)++; |
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return 1; |
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}
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}
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return days/7+1; |
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}
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void get_date_from_daynr(long daynr, |
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uint32_t *ret_year, |
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uint32_t *ret_month, |
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uint32_t *ret_day) |
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{
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uint32_t year,temp,leap_day,day_of_year,days_in_year; |
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unsigned char *month_pos; |
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if (daynr <= 365L || daynr >= 3652500) |
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{ /* Fix if wrong daynr */ |
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*ret_year= *ret_month = *ret_day =0; |
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}
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else
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{
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year= (uint32_t) (daynr*100 / 36525L); |
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temp=(((year-1)/100+1)*3)/4; |
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day_of_year=(uint32_t) (daynr - (long) year * 365L) - (year-1)/4 +temp; |
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while (day_of_year > (days_in_year= calc_days_in_year(year))) |
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{
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day_of_year-=days_in_year; |
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(year)++; |
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}
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leap_day=0; |
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if (days_in_year == 366) |
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{
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if (day_of_year > 31+28) |
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{
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day_of_year--; |
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if (day_of_year == 31+28) |
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leap_day=1; /* Handle leapyears leapday */ |
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}
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}
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*ret_month=1; |
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for (month_pos= days_in_month ; |
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day_of_year > (uint32_t) *month_pos ; |
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day_of_year-= *(month_pos++), (*ret_month)++) |
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;
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*ret_year=year; |
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*ret_day=day_of_year+leap_day; |
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}
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return; |
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}
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enum enum_drizzle_timestamp_type |
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str_to_datetime_with_warn(const char *str, |
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uint32_t length, |
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DRIZZLE_TIME *l_time, |
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uint32_t flags) |
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{
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int was_cut; |
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Session *session= current_session; |
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enum enum_drizzle_timestamp_type ts_type; |
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ts_type= str_to_datetime(str, length, l_time, |
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(flags | (session->variables.sql_mode & |
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(MODE_INVALID_DATES | |
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MODE_NO_ZERO_DATE))), |
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&was_cut); |
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if (was_cut || ts_type <= DRIZZLE_TIMESTAMP_ERROR) |
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make_truncated_value_warning(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN, |
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str, length, ts_type, NULL); |
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return ts_type; |
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}
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bool
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str_to_time_with_warn(const char *str, uint32_t length, DRIZZLE_TIME *l_time) |
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{
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int warning; |
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bool ret_val= str_to_time(str, length, l_time, &warning); |
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if (ret_val || warning) |
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make_truncated_value_warning(current_session, DRIZZLE_ERROR::WARN_LEVEL_WARN, |
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str, length, DRIZZLE_TIMESTAMP_TIME, NULL); |
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return ret_val; |
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}
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void localtime_to_TIME(DRIZZLE_TIME *to, struct tm *from) |
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{
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to->neg=0; |
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to->second_part=0; |
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to->year= (int) ((from->tm_year+1900) % 10000); |
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to->month= (int) from->tm_mon+1; |
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to->day= (int) from->tm_mday; |
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to->hour= (int) from->tm_hour; |
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to->minute= (int) from->tm_min; |
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to->second= (int) from->tm_sec; |
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}
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void make_date(const DRIZZLE_TIME *l_time, String *str) |
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{
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str->alloc(MAX_DATE_STRING_REP_LENGTH); |
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uint32_t length= (uint32_t) my_date_to_str(l_time, str->c_ptr()); |
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str->length(length); |
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str->set_charset(&my_charset_bin); |
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}
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void make_datetime(const DRIZZLE_TIME *l_time, String *str) |
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{
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str->alloc(MAX_DATE_STRING_REP_LENGTH); |
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uint32_t length= (uint32_t) my_datetime_to_str(l_time, str->c_ptr()); |
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str->length(length); |
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str->set_charset(&my_charset_bin); |
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}
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void make_truncated_value_warning(Session *session, |
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DRIZZLE_ERROR::enum_warning_level level, |
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const char *str_val, |
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uint32_t str_length, |
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enum enum_drizzle_timestamp_type time_type, |
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const char *field_name) |
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{
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char warn_buff[DRIZZLE_ERRMSG_SIZE]; |
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const char *type_str; |
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CHARSET_INFO *cs= &my_charset_utf8_general_ci; |
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char buff[128]; |
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String str(buff,(uint32_t) sizeof(buff), system_charset_info); |
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str.copy(str_val, str_length, system_charset_info); |
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str[str_length]= 0; // Ensure we have end 0 for snprintf |
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switch (time_type) { |
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case DRIZZLE_TIMESTAMP_DATE: |
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type_str= "date"; |
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break; |
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case DRIZZLE_TIMESTAMP_TIME: |
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type_str= "time"; |
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break; |
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case DRIZZLE_TIMESTAMP_DATETIME: // FALLTHROUGH |
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default: |
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type_str= "datetime"; |
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break; |
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}
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if (field_name) |
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cs->cset->snprintf(cs, warn_buff, sizeof(warn_buff), |
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ER(ER_TRUNCATED_WRONG_VALUE_FOR_FIELD), |
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type_str, str.c_ptr(), field_name, |
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(uint32_t) session->row_count); |
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else
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{
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if (time_type > DRIZZLE_TIMESTAMP_ERROR) |
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cs->cset->snprintf(cs, warn_buff, sizeof(warn_buff), |
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ER(ER_TRUNCATED_WRONG_VALUE), |
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type_str, str.c_ptr()); |
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else
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cs->cset->snprintf(cs, warn_buff, sizeof(warn_buff), |
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ER(ER_WRONG_VALUE), type_str, str.c_ptr()); |
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}
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push_warning(session, level, |
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ER_TRUNCATED_WRONG_VALUE, warn_buff); |
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}
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bool
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calc_time_diff(DRIZZLE_TIME *l_time1, DRIZZLE_TIME *l_time2, int l_sign, int64_t *seconds_out, |
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long *microseconds_out) |
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{
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long days; |
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bool neg; |
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int64_t microseconds; |
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/*
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We suppose that if first argument is DRIZZLE_TIMESTAMP_TIME
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the second argument should be TIMESTAMP_TIME also.
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We should check it before calc_time_diff call.
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*/
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if (l_time1->time_type == DRIZZLE_TIMESTAMP_TIME) // Time value |
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days= (long)l_time1->day - l_sign * (long)l_time2->day; |
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else
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{
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days= calc_daynr((uint32_t) l_time1->year, |
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(uint32_t) l_time1->month, |
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(uint32_t) l_time1->day); |
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if (l_time2->time_type == DRIZZLE_TIMESTAMP_TIME) |
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days-= l_sign * (long)l_time2->day; |
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else
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days-= l_sign*calc_daynr((uint32_t) l_time2->year, |
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(uint32_t) l_time2->month, |
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(uint32_t) l_time2->day); |
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}
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microseconds= ((int64_t)days*86400L + |
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(int64_t)(l_time1->hour*3600L + |
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l_time1->minute*60L + |
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l_time1->second) - |
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l_sign*(int64_t)(l_time2->hour*3600L + |
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l_time2->minute*60L + |
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l_time2->second)) * 1000000L + |
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(int64_t)l_time1->second_part - |
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l_sign*(int64_t)l_time2->second_part; |
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neg= 0; |
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if (microseconds < 0) |
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{
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microseconds= -microseconds; |
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neg= 1; |
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}
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*seconds_out= microseconds/1000000L; |
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*microseconds_out= (long) (microseconds%1000000L); |
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return neg; |
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}
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} /* namespace drizzled */ |