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//! The Oracle DATE which represents the year, month, day, hour, minute, and second of the date. use crate::*; use super::*; use libc::c_void; use std::{ mem, ptr, cmp::Ordering }; extern "C" { // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-E0890180-8714-4243-A585-0FD21EB05CA9 fn OCIDateAddDays( err: *mut OCIError, date: *const OCIDate, num_days: i32, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-CE37ECF1-622A-49A9-A9FD-40E1BD67C941 fn OCIDateAddMonths( err: *mut OCIError, date: *const OCIDate, num_months: i32, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-2251373B-4F7B-4680-BB90-F9013216465A fn OCIDateAssign( err: *mut OCIError, date: *const OCIDate, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-067F7EB4-419B-4A5B-B1C4-B4C650B874A3 // fn OCIDateCheck( // err: *mut OCIError, // date: *const OCIDate, // result: *mut u32 // ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-282C5B79-64AA-4B34-BFC6-292144B1AD16 fn OCIDateCompare( err: *mut OCIError, date1: *const OCIDate, date2: *const OCIDate, result: *mut i32 ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-42422C47-805F-4EAA-BF44-E6DE6164082E fn OCIDateDaysBetween( err: *mut OCIError, date1: *const OCIDate, date2: *const OCIDate, result: *mut i32 ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-EA8FEB07-401C-477E-805B-CC9E89FB13F4 fn OCIDateFromText( err: *mut OCIError, txt: *const u8, txt_len: u32, fmt: *const u8, fmt_len: u8, lang: *const u8, lang_len: u32, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-14FB323E-BAEB-4FC7-81DA-6AF243C0D7D6 fn OCIDateLastDay( err: *mut OCIError, date: *const OCIDate, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-A16AB88E-A3BF-4B50-8FEF-6427926198F4 fn OCIDateNextDay( err: *mut OCIError, date: *const OCIDate, day: *const u8, day_len: u32, result: *mut OCIDate ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-123DD789-48A2-4AD7-8B1E-5E454DFE3F1E fn OCIDateToText( err: *mut OCIError, date: *const OCIDate, fmt: *const u8, fmt_len: u8, lang: *const u8, lang_len: u32, buf_size: *mut u32, buf: *mut u8 ) -> i32; // https://docs.oracle.com/en/database/oracle/oracle-database/19/lnoci/oci-date-datetime-and-interval-functions.html#GUID-751D4F33-E593-4845-9D5E-8761A19BD243 fn OCIDateSysDate( err: *mut OCIError, result: *mut OCIDate ) -> i32; } /// C mapping of the Oracle DATE type (SQLT_ODT) #[repr(C)] pub struct OCIDate { year: i16, // gregorian year: range is -4712 <= year <= 9999 month: u8, // month: range is 1 <= month <= 12 day: u8, // day: range is 1 <= day <= 31 hour: u8, // hours: range is 0 <= hours <= 23 min: u8, // minutes: range is 0 <= minutes <= 59 sec: u8 // seconds: range is 0 <= seconds <= 59 } pub(crate) fn new() -> OCIDate { let date : OCIDate; unsafe { date = mem::uninitialized(); } date } pub(crate) fn to_string(fmt: &str, date: *const OCIDate, err: *mut OCIError) -> Result<String> { let mut txt: [u8;128]; let mut txt_len: u32; catch!{err => txt = mem::uninitialized(); txt_len = txt.len() as u32; OCIDateToText( err, date, fmt.as_ptr(), fmt.len() as u8, ptr::null(), 0, &mut txt_len, txt.as_mut_ptr() ) } let txt = &txt[0..txt_len as usize]; Ok( String::from_utf8_lossy(txt).to_string() ) } pub(crate) fn from_date<'a>(from: &OCIDate, env: &'a dyn UsrEnv) -> Result<Date<'a>> { let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateAssign(env.err_ptr(), from as *const OCIDate, &mut date) } Ok( Date { env, date } ) } /// Represents Oracle DATE pub struct Date<'e> { env: &'e dyn UsrEnv, date: OCIDate, } impl<'e> Date<'e> { /// Constructs new date pub fn new(year: i16, month: u8, day: u8, env: &'e dyn UsrEnv) -> Self { Self { env, date: OCIDate { year, month, day, hour: 0, min: 0, sec: 0 } } } /// Constructs new date with time pub fn with_time(year: i16, month: u8, day: u8, hour: u8, min: u8, sec: u8, env: &'e dyn UsrEnv) -> Self { Self { env, date: OCIDate { year, month, day, hour, min, sec } } } /// Converts a character string to a date type according to the specified format /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let date = oracle::Date::from_string("July 4, 1776", "MONTH DD, YYYY", &env)?; /// let (y, m, d) = date.get_date(); /// /// assert_eq!(1776, y); /// assert_eq!( 7, m); /// assert_eq!( 4, d); /// # Ok::<(),oracle::Error>(()) /// ``` pub fn from_string(txt: &str, fmt: &str, env: &'e dyn UsrEnv) -> Result<Self> { let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateFromText( env.err_ptr(), txt.as_ptr(), txt.len() as u32, fmt.as_ptr(), fmt.len() as u8, ptr::null(), 0, &mut date ) } Ok( Self { env, date } ) } /// Constructs new date from the client's system clock /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let date = oracle::Date::from_sysdate(&env)?; /// let (y, _m, _d) = date.get_date(); /// /// assert!(2019 <= y); /// # Ok::<(),oracle::Error>(()) /// ``` pub fn from_sysdate(env: &'e dyn UsrEnv) -> Result<Self> { let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateSysDate(env.err_ptr(), &mut date) } Ok( Self { env, date } ) } /// Performs a date assignment pub fn from_date(from: &Date, env: &'e dyn UsrEnv) -> Result<Self> { from_date(&from.date, env) } pub(crate) fn as_ptr(&self) -> *const OCIDate { &self.date } pub(crate) fn as_mut_ptr(&mut self) -> *mut OCIDate { &mut self.date } /// Gets the year, month, and day stored in an Oracle date. pub fn get_date(&self) -> (i16, u8, u8) { (self.date.year, self.date.month, self.date.day) } /// Changes the date. pub fn set_date(&mut self, year: i16, month: u8, day: u8) { self.date.year = year; self.date.month = month; self.date.day = day; } /// Gets the time stored in an Oracle date pub fn get_time(&self) -> (u8, u8, u8) { (self.date.hour, self.date.min, self.date.sec) } /// Changes the time pub fn set_time(&mut self, hour: u8, min: u8, sec: u8) { self.date.hour = hour; self.date.min = min; self.date.sec = sec; } /// Returns a string according to the specified format. /// /// Refer to "TO_DATE" conversion function for a description of format. /// /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let date = oracle::Date::new(-1952, 2, 25, &env); /// let res = date.to_string("DD-MON-YYYY BC")?; /// /// assert_eq!("25-FEB-1952 BC", res); /// # Ok::<(),oracle::Error>(()) /// ``` /// pub fn to_string(&self, fmt: &str) -> Result<String> { to_string(fmt, self.as_ptr(), self.env.err_ptr()) } /// Adds or subtracts days from this date /// /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let start = oracle::Date::new(1969, 7, 16, &env); /// let end = start.add_days(8)?; /// let (y,m,d) = end.get_date(); /// /// assert_eq!(1969, y); /// assert_eq!( 7, m); /// assert_eq!( 24, d); /// # Ok::<(),oracle::Error>(()) /// ``` pub fn add_days(&self, num: i32) -> Result<Date> { let env = self.env; let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateAddDays(env.err_ptr(), self.as_ptr(), num, &mut date) } Ok( Self { env, date } ) } /// Adds or subtracts months from this date. /// /// If the input date is the last day of a month, then the appropriate adjustments /// are made to ensure that the output date is also the last day of the month. /// For example, Feb. 28 + 1 month = March 31, and November 30 – 3 months = August 31. /// Otherwise the result date has the same day component as date. /// /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let date = oracle::Date::new(2019, 12, 31, &env); /// let date = date.add_months(2)?; /// let (y,m,d) = date.get_date(); /// /// assert_eq!(2020, y); /// assert_eq!( 2, m); /// assert_eq!( 29, d); /// /// let date = date.add_months(2)?; /// let (y,m,d) = date.get_date(); /// /// assert_eq!(2020, y); /// assert_eq!( 4, m); /// assert_eq!( 30, d); /// # Ok::<(),oracle::Error>(()) /// ``` pub fn add_months(&self, num: i32) -> Result<Date> { let env = self.env; let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateAddMonths(env.err_ptr(), self.as_ptr(), num, &mut date) } Ok( Self { env, date } ) } /// Compares this date with the `other` date. pub fn compare(&self, other: &Date) -> Result<Ordering> { let mut res : i32; catch!{self.env.err_ptr() => res = mem::uninitialized(); OCIDateCompare(self.env.err_ptr(), self.as_ptr(), other.as_ptr(), &mut res) } let ordering = if res < 0 { Ordering::Less } else if res == 0 { Ordering::Equal } else { Ordering::Greater }; Ok( ordering ) } /// Gets the number of days between two dates. /// /// When the number of days between date1 and date2 is computed, the time is ignored. /// /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let pearl_harbor = oracle::Date::new(1941, 12, 7, &env); /// let normandy_landings = oracle::Date::new(1944, 6, 6, &env); /// let days_between = normandy_landings.days_from(&pearl_harbor)?; /// /// assert_eq!(912, days_between); /// # Ok::<(),oracle::Error>(()) /// ``` /// pub fn days_from(&self, other: &Date) -> Result<i32> { let mut res : i32; catch!{self.env.err_ptr() => res = mem::uninitialized(); OCIDateDaysBetween(self.env.err_ptr(), self.as_ptr(), other.as_ptr(), &mut res) } Ok( res ) } /// Gets the date of the last day of the month in a specified date. /// /// ## Example /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let date = oracle::Date::new(2020, 2, 9, &env); /// let date = date.month_last_day()?; /// let (y,m,d) = date.get_date(); /// /// assert_eq!(2020, y); /// assert_eq!( 2, m); /// assert_eq!( 29, d); /// # Ok::<(),oracle::Error>(()) /// ``` /// pub fn month_last_day(&self) -> Result<Date> { let env = self.env; let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateLastDay(env.err_ptr(), self.as_ptr(), &mut date) } Ok( Self { env, date } ) } /// Gets the date of the next day of the week after a given date. /// /// ## Example /// The following code example shows how to get the date of the next Monday after April 18, 1996 (a Thursday). /// ``` /// use sibyl as oracle; /// /// let env = oracle::env()?; /// let apr18_1996 = oracle::Date::from_string("18-APR-1996", "DD-MON-YYYY", &env)?; /// let next_mon = apr18_1996.next_week_day("MONDAY")?; /// let next_mon = next_mon.to_string("DD-MON-YYYY")?; /// /// assert_eq!("22-APR-1996", next_mon); /// # Ok::<(),oracle::Error>(()) /// ``` pub fn next_week_day(&self, weekday: &str) -> Result<Date> { let env = self.env; let mut date : OCIDate; catch!{env.err_ptr() => date = mem::uninitialized(); OCIDateNextDay( env.err_ptr(), self.as_ptr(), weekday.as_ptr(), weekday.len() as u32, &mut date ) } Ok( Self { env, date } ) } } impl ToSql for Date<'_> { fn to_sql(&self) -> (u16, *const c_void, usize) { ( SQLT_ODT, self.as_ptr() as *const c_void, std::mem::size_of::<OCIDate>() ) } } impl ToSqlOut for Date<'_> { fn to_sql_output(&mut self, _col_size: usize) -> (u16, *mut c_void, usize) { (SQLT_ODT, self.as_mut_ptr() as *mut c_void, std::mem::size_of::<OCIDate>()) } } impl ToSqlOut for OCIDate { fn to_sql_output(&mut self, _col_size: usize) -> (u16, *mut c_void, usize) { (SQLT_ODT, self as *mut OCIDate as *mut c_void, std::mem::size_of::<OCIDate>()) } }