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Add From/ToSql impl. for chrono types.

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gwenn 2016-02-22 20:36:49 +01:00
parent 2cb6c59b3d
commit bdb9823b07
3 changed files with 271 additions and 0 deletions
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1
Cargo.toml
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@ -23,6 +23,7 @@ trace = []
time = "~0.1.0" time = "~0.1.0"
bitflags = "~0.1" bitflags = "~0.1"
libc = "~0.2" libc = "~0.2"
chrono = { version = "~0.2", optional = true }
[dev-dependencies] [dev-dependencies]
tempdir = "~0.3.4" tempdir = "~0.3.4"

267
src/types/chrono.rs Normal file
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@ -0,0 +1,267 @@
//! Convert most of the [Time Strings](http://sqlite.org/lang_datefunc.html) to chrono types.
extern crate chrono;
use std::error;
use self::chrono::{NaiveDate, NaiveTime, NaiveDateTime, DateTime, TimeZone, UTC, Local};
use libc::c_int;
use {Error, Result};
use types::{FromSql, ToSql};
use ffi;
use ffi::sqlite3_stmt;
use ffi::sqlite3_column_type;
const JULIAN_DAY: f64 = 2440587.5; // 1970-01-01 00:00:00 is JD 2440587.5
const DAY_IN_SECONDS: f64 = 86400.0;
const JULIAN_DAY_GREGORIAN: f64 = 1721424.5; // Jan 1, 1 proleptic Gregorian calendar
/// ISO 8601 calendar date without timezone => "YYYY-MM-DD"
impl ToSql for NaiveDate {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let date_str = self.format("%Y-%m-%d").to_string();
date_str.bind_parameter(stmt, col)
}
}
/// "YYYY-MM-DD" or Julian Day => ISO 8601 calendar date without timezone.
impl FromSql for NaiveDate {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> Result<NaiveDate> {
match sqlite3_column_type(stmt, col) {
ffi::SQLITE_TEXT => {
let s = try!(String::column_result(stmt, col));
match NaiveDate::parse_from_str(&s, "%Y-%m-%d") {
Ok(dt) => Ok(dt),
Err(err) => Err(Error::FromSqlConversionFailure(Box::new(err))),
}
}
ffi::SQLITE_FLOAT => {
// if column affinity is REAL and an integer/unix timestamp is inserted => unexpected result
let mut jd = ffi::sqlite3_column_double(stmt, col);
jd -= JULIAN_DAY_GREGORIAN;
if jd < i32::min_value() as f64 || jd > i32::max_value() as f64 {
let err: Box<error::Error + Sync + Send> = "out-of-range date".into();
return Err(Error::FromSqlConversionFailure(err));
}
match NaiveDate::from_num_days_from_ce_opt(jd as i32) {
Some(dt) => Ok(dt),
None => {
let err: Box<error::Error + Sync + Send> = "out-of-range date".into();
Err(Error::FromSqlConversionFailure(err))
}
}
}
_ => Err(Error::InvalidColumnType),
}
}
unsafe fn column_has_valid_sqlite_type(stmt: *mut sqlite3_stmt, col: c_int) -> bool {
let sqlite_type = sqlite3_column_type(stmt, col);
sqlite_type == ffi::SQLITE_TEXT || sqlite_type == ffi::SQLITE_FLOAT
}
}
/// ISO 8601 time without timezone => "HH:MM:SS.SSS"
impl ToSql for NaiveTime {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let date_str = self.format("%H:%M:%S.3f").to_string();
date_str.bind_parameter(stmt, col)
}
}
/// "HH:MM"/"HH:MM:SS"/"HH:MM:SS.SSS" => ISO 8601 time without timezone.
impl FromSql for NaiveTime {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> Result<NaiveTime> {
match sqlite3_column_type(stmt, col) {
ffi::SQLITE_TEXT => {
let s = try!(String::column_result(stmt, col));
let fmt = match s.len() {
5 => "%H:%M",
8 => "%H:%M:%S",
_ => "%H:%M:%S%.3f",
};
match NaiveTime::parse_from_str(&s, fmt) {
Ok(dt) => Ok(dt),
Err(err) => Err(Error::FromSqlConversionFailure(Box::new(err))),
}
}
_ => Err(Error::InvalidColumnType),
}
}
unsafe fn column_has_valid_sqlite_type(stmt: *mut sqlite3_stmt, col: c_int) -> bool {
sqlite3_column_type(stmt, col) == ffi::SQLITE_TEXT
}
}
/// ISO 8601 combined date and time without timezone => "YYYY-MM-DD HH:MM:SS.SSS"
impl ToSql for NaiveDateTime {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let date_str = self.format("%Y-%m-%d %H:%M:%S%.3f").to_string();
date_str.bind_parameter(stmt, col)
}
}
/// "YYYY-MM-DD HH:MM"/"YYYY-MM-DD HH:MM:SS"/"YYYY-MM-DD HH:MM:SS.SSS"/ Julian Day / Unix Time => ISO 8601 combined date and time without timezone.
/// ("YYYY-MM-DDTHH:MM"/"YYYY-MM-DDTHH:MM:SS"/"YYYY-MM-DDTHH:MM:SS.SSS" also supported)
impl FromSql for NaiveDateTime {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> Result<NaiveDateTime> {
match sqlite3_column_type(stmt, col) {
ffi::SQLITE_TEXT => {
let s = try!(String::column_result(stmt, col));
let fmt = match s.len() {
16 => {
match s.as_bytes()[10] {
b'T' => "%Y-%m-%dT%H:%M",
_ => "%Y-%m-%d %H:%M",
}
}
19 => {
match s.as_bytes()[10] {
b'T' => "%Y-%m-%dT%H:%M:%S",
_ => "%Y-%m-%d %H:%M:%S",
}
}
_ => {
match s.as_bytes()[10] {
b'T' => "%Y-%m-%dT%H:%M:%S%.3f",
_ => "%Y-%m-%d %H:%M:%S%.3f",
}
}
};
match NaiveDateTime::parse_from_str(&s, fmt) {
Ok(dt) => Ok(dt),
Err(err) => Err(Error::FromSqlConversionFailure(Box::new(err))),
}
}
ffi::SQLITE_INTEGER => {
match NaiveDateTime::from_timestamp_opt(ffi::sqlite3_column_int64(stmt, col), 0) {
Some(dt) => Ok(dt),
None => {
let err: Box<error::Error + Sync + Send> = "out-of-range number of seconds"
.into();
Err(Error::FromSqlConversionFailure(err))
}
}
}
ffi::SQLITE_FLOAT => {
// if column affinity is REAL and an integer/unix timestamp is inserted => unexpected result
let mut jd = ffi::sqlite3_column_double(stmt, col);
jd -= JULIAN_DAY;
jd *= DAY_IN_SECONDS;
let ns = jd.fract() * 10f64.powi(9);
match NaiveDateTime::from_timestamp_opt(jd as i64, ns as u32) {
Some(dt) => Ok(dt),
None => {
let err: Box<error::Error + Sync + Send> = "out-of-range number of \
seconds and/or invalid \
nanosecond"
.into();
Err(Error::FromSqlConversionFailure(err))
}
}
}
_ => Err(Error::InvalidColumnType),
}
}
unsafe fn column_has_valid_sqlite_type(stmt: *mut sqlite3_stmt, col: c_int) -> bool {
let sqlite_type = sqlite3_column_type(stmt, col);
sqlite_type == ffi::SQLITE_TEXT || sqlite_type == ffi::SQLITE_INTEGER ||
sqlite_type == ffi::SQLITE_FLOAT
}
}
/// ISO 8601 date and time with time zone => "YYYY-MM-DD HH:MM:SS.SSS[+-]HH:MM"
impl ToSql for DateTime<UTC> {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let date_str = self.format("%Y-%m-%dT%H:%M:%S%.3f%:z").to_string();
date_str.bind_parameter(stmt, col)
}
}
/// "YYYY-MM-DD HH:MM:SS.SSS[+-]HH:MM"/"YYYY-MM-DD HH:MM"/"YYYY-MM-DD HH:MM:SS"/"YYYY-MM-DD HH:MM:SS.SSS"/ Julian Day / Unix Time => ISO 8601 date and time with time zone.
/// ("YYYY-MM-DDTHH:MM:SS.SSS[+-]HH:MM"/"YYYY-MM-DDTHH:MM"/"YYYY-MM-DDTHH:MM:SS"/"YYYY-MM-DDTHH:MM:SS.SSS" also supported)
/// When the timezone is not specified, UTC is used.
impl FromSql for DateTime<UTC> {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> Result<DateTime<UTC>> {
match sqlite3_column_type(stmt, col) {
ffi::SQLITE_TEXT => {
let s = try!(String::column_result(stmt, col));
if s.len() > 23 {
let fmt = if s.as_bytes()[10] == b'T' {
"%Y-%m-%dT%H:%M:%S%.3f%:z"
} else {
"%Y-%m-%d %H:%M:%S%.3f%:z"
};
match UTC.datetime_from_str(fmt, &s) {
Ok(dt) => Ok(dt),
Err(err) => Err(Error::FromSqlConversionFailure(Box::new(err))),
}
} else {
NaiveDateTime::column_result(stmt, col).map(|dt| UTC.from_utc_datetime(&dt))
}
}
ffi::SQLITE_INTEGER => {
NaiveDateTime::column_result(stmt, col).map(|dt| UTC.from_utc_datetime(&dt))
}
ffi::SQLITE_FLOAT => {
NaiveDateTime::column_result(stmt, col).map(|dt| UTC.from_utc_datetime(&dt))
}
_ => Err(Error::InvalidColumnType),
}
}
unsafe fn column_has_valid_sqlite_type(stmt: *mut sqlite3_stmt, col: c_int) -> bool {
NaiveDateTime::column_has_valid_sqlite_type(stmt, col)
}
}
/// ISO 8601 date and time with time zone => "YYYY-MM-DD HH:MM:SS.SSS[+-]HH:MM"
impl ToSql for DateTime<Local> {
unsafe fn bind_parameter(&self, stmt: *mut sqlite3_stmt, col: c_int) -> c_int {
let date_str = self.format("%Y-%m-%dT%H:%M:%S%.3f%:z").to_string();
date_str.bind_parameter(stmt, col)
}
}
/// "YYYY-MM-DD HH:MM:SS.SSS[+-]HH:MM"/"YYYY-MM-DD HH:MM"/"YYYY-MM-DD HH:MM:SS"/"YYYY-MM-DD HH:MM:SS.SSS"/ Julian Day / Unix Time => ISO 8601 date and time with time zone.
/// ("YYYY-MM-DDTHH:MM:SS.SSS[+-]HH:MM"/"YYYY-MM-DDTHH:MM"/"YYYY-MM-DDTHH:MM:SS"/"YYYY-MM-DDTHH:MM:SS.SSS" also supported)
/// When the timezone is not specified, Local is used.
impl FromSql for DateTime<Local> {
unsafe fn column_result(stmt: *mut sqlite3_stmt, col: c_int) -> Result<DateTime<Local>> {
match sqlite3_column_type(stmt, col) {
ffi::SQLITE_TEXT => {
let s = try!(String::column_result(stmt, col));
if s.len() > 23 {
let fmt = if s.as_bytes()[10] == b'T' {
"%Y-%m-%dT%H:%M:%S%.3f%:z"
} else {
"%Y-%m-%d %H:%M:%S%.3f%:z"
};
match Local.datetime_from_str(fmt, &s) {
Ok(dt) => Ok(dt),
Err(err) => Err(Error::FromSqlConversionFailure(Box::new(err))),
}
} else {
NaiveDateTime::column_result(stmt, col).map(|dt| Local.from_utc_datetime(&dt))
}
}
ffi::SQLITE_INTEGER => {
NaiveDateTime::column_result(stmt, col).map(|dt| Local.from_utc_datetime(&dt))
}
ffi::SQLITE_FLOAT => {
NaiveDateTime::column_result(stmt, col).map(|dt| Local.from_utc_datetime(&dt))
}
_ => Err(Error::InvalidColumnType),
}
}
unsafe fn column_has_valid_sqlite_type(stmt: *mut sqlite3_stmt, col: c_int) -> bool {
NaiveDateTime::column_has_valid_sqlite_type(stmt, col)
}
}
// struct UnixTime(NaiveDateTime);
// struct JulianTime(NaiveDateTime)

3
src/types.rs → src/types/mod.rs
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@ -66,6 +66,9 @@ pub use ffi::sqlite3_column_type;
pub use ffi::{SQLITE_INTEGER, SQLITE_FLOAT, SQLITE_TEXT, SQLITE_BLOB, SQLITE_NULL}; pub use ffi::{SQLITE_INTEGER, SQLITE_FLOAT, SQLITE_TEXT, SQLITE_BLOB, SQLITE_NULL};
#[cfg(feature = "chrono")]
mod chrono;
const SQLITE_DATETIME_FMT: &'static str = "%Y-%m-%d %H:%M:%S"; const SQLITE_DATETIME_FMT: &'static str = "%Y-%m-%d %H:%M:%S";
/// A trait for types that can be converted into SQLite values. /// A trait for types that can be converted into SQLite values.