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Diffstat (limited to 'vendor/tracing-subscriber/src/fmt/time/datetime.rs')
| -rw-r--r-- | vendor/tracing-subscriber/src/fmt/time/datetime.rs | 410 |
1 files changed, 410 insertions, 0 deletions
diff --git a/vendor/tracing-subscriber/src/fmt/time/datetime.rs b/vendor/tracing-subscriber/src/fmt/time/datetime.rs new file mode 100644 index 000000000..531331687 --- /dev/null +++ b/vendor/tracing-subscriber/src/fmt/time/datetime.rs @@ -0,0 +1,410 @@ +// musl as a whole is licensed under the following standard MIT license: +// +// ---------------------------------------------------------------------- +// Copyright © 2005-2020 Rich Felker, et al. +// +// Permission is hereby granted, free of charge, to any person obtaining +// a copy of this software and associated documentation files (the +// "Software"), to deal in the Software without restriction, including +// without limitation the rights to use, copy, modify, merge, publish, +// distribute, sublicense, and/or sell copies of the Software, and to +// permit persons to whom the Software is furnished to do so, subject to +// the following conditions: +// +// The above copyright notice and this permission notice shall be +// included in all copies or substantial portions of the Software. +// +// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. +// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY +// CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, +// TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE +// SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. +// ---------------------------------------------------------------------- +// +// Authors/contributors include: +// +// A. Wilcox +// Ada Worcester +// Alex Dowad +// Alex Suykov +// Alexander Monakov +// Andre McCurdy +// Andrew Kelley +// Anthony G. Basile +// Aric Belsito +// Arvid Picciani +// Bartosz Brachaczek +// Benjamin Peterson +// Bobby Bingham +// Boris Brezillon +// Brent Cook +// Chris Spiegel +// Clément Vasseur +// Daniel Micay +// Daniel Sabogal +// Daurnimator +// David Carlier +// David Edelsohn +// Denys Vlasenko +// Dmitry Ivanov +// Dmitry V. Levin +// Drew DeVault +// Emil Renner Berthing +// Fangrui Song +// Felix Fietkau +// Felix Janda +// Gianluca Anzolin +// Hauke Mehrtens +// He X +// Hiltjo Posthuma +// Isaac Dunham +// Jaydeep Patil +// Jens Gustedt +// Jeremy Huntwork +// Jo-Philipp Wich +// Joakim Sindholt +// John Spencer +// Julien Ramseier +// Justin Cormack +// Kaarle Ritvanen +// Khem Raj +// Kylie McClain +// Leah Neukirchen +// Luca Barbato +// Luka Perkov +// M Farkas-Dyck (Strake) +// Mahesh Bodapati +// Markus Wichmann +// Masanori Ogino +// Michael Clark +// Michael Forney +// Mikhail Kremnyov +// Natanael Copa +// Nicholas J. Kain +// orc +// Pascal Cuoq +// Patrick Oppenlander +// Petr Hosek +// Petr Skocik +// Pierre Carrier +// Reini Urban +// Rich Felker +// Richard Pennington +// Ryan Fairfax +// Samuel Holland +// Segev Finer +// Shiz +// sin +// Solar Designer +// Stefan Kristiansson +// Stefan O'Rear +// Szabolcs Nagy +// Timo Teräs +// Trutz Behn +// Valentin Ochs +// Will Dietz +// William Haddon +// William Pitcock +// +// Portions of this software are derived from third-party works licensed +// under terms compatible with the above MIT license: +// +// The TRE regular expression implementation (src/regex/reg* and +// src/regex/tre*) is Copyright © 2001-2008 Ville Laurikari and licensed +// under a 2-clause BSD license (license text in the source files). The +// included version has been heavily modified by Rich Felker in 2012, in +// the interests of size, simplicity, and namespace cleanliness. +// +// Much of the math library code (src/math/* and src/complex/*) is +// Copyright © 1993,2004 Sun Microsystems or +// Copyright © 2003-2011 David Schultz or +// Copyright © 2003-2009 Steven G. Kargl or +// Copyright © 2003-2009 Bruce D. Evans or +// Copyright © 2008 Stephen L. Moshier or +// Copyright © 2017-2018 Arm Limited +// and labelled as such in comments in the individual source files. All +// have been licensed under extremely permissive terms. +// +// The ARM memcpy code (src/string/arm/memcpy.S) is Copyright © 2008 +// The Android Open Source Project and is licensed under a two-clause BSD +// license. It was taken from Bionic libc, used on Android. +// +// The AArch64 memcpy and memset code (src/string/aarch64/*) are +// Copyright © 1999-2019, Arm Limited. +// +// The implementation of DES for crypt (src/crypt/crypt_des.c) is +// Copyright © 1994 David Burren. It is licensed under a BSD license. +// +// The implementation of blowfish crypt (src/crypt/crypt_blowfish.c) was +// originally written by Solar Designer and placed into the public +// domain. The code also comes with a fallback permissive license for use +// in jurisdictions that may not recognize the public domain. +// +// The smoothsort implementation (src/stdlib/qsort.c) is Copyright © 2011 +// Valentin Ochs and is licensed under an MIT-style license. +// +// The x86_64 port was written by Nicholas J. Kain and is licensed under +// the standard MIT terms. +// +// The mips and microblaze ports were originally written by Richard +// Pennington for use in the ellcc project. The original code was adapted +// by Rich Felker for build system and code conventions during upstream +// integration. It is licensed under the standard MIT terms. +// +// The mips64 port was contributed by Imagination Technologies and is +// licensed under the standard MIT terms. +// +// The powerpc port was also originally written by Richard Pennington, +// and later supplemented and integrated by John Spencer. It is licensed +// under the standard MIT terms. +// +// All other files which have no copyright comments are original works +// produced specifically for use as part of this library, written either +// by Rich Felker, the main author of the library, or by one or more +// contibutors listed above. Details on authorship of individual files +// can be found in the git version control history of the project. The +// omission of copyright and license comments in each file is in the +// interest of source tree size. +// +// In addition, permission is hereby granted for all public header files +// (include/* and arch/*/bits/*) and crt files intended to be linked into +// applications (crt/*, ldso/dlstart.c, and arch/*/crt_arch.h) to omit +// the copyright notice and permission notice otherwise required by the +// license, and to use these files without any requirement of +// attribution. These files include substantial contributions from: +// +// Bobby Bingham +// John Spencer +// Nicholas J. Kain +// Rich Felker +// Richard Pennington +// Stefan Kristiansson +// Szabolcs Nagy +// +// all of whom have explicitly granted such permission. +// +// This file previously contained text expressing a belief that most of +// the files covered by the above exception were sufficiently trivial not +// to be subject to copyright, resulting in confusion over whether it +// negated the permissions granted in the license. In the spirit of +// permissive licensing, and of not having licensing issues being an +// obstacle to adoption, that text has been removed. + + +use std::fmt; + +/// A date/time type which exists primarily to convert `SystemTime` timestamps into an ISO 8601 +/// formatted string. +/// +/// Yes, this exists. Before you have a heart attack, understand that the meat of this is musl's +/// [`__secs_to_tm`][1] converted to Rust via [c2rust][2] and then cleaned up by hand as part of +/// the [kudu-rs project][3], [released under MIT][4]. +/// +/// [1] http://git.musl-libc.org/cgit/musl/tree/src/time/__secs_to_tm.c +/// [2] https://c2rust.com/ +/// [3] https://github.com/danburkert/kudu-rs/blob/c9660067e5f4c1a54143f169b5eeb49446f82e54/src/timestamp.rs#L5-L18 +/// [4] https://github.com/tokio-rs/tracing/issues/1644#issuecomment-963888244 +/// +/// All existing `strftime`-like APIs I found were unable to handle the full range of timestamps representable +/// by `SystemTime`, including `strftime` itself, since tm.tm_year is an int. +#[derive(Debug, Clone, Copy, PartialEq, Eq)] +pub(crate) struct DateTime { + year: i64, + month: u8, + day: u8, + hour: u8, + minute: u8, + second: u8, + nanos: u32, +} + +impl fmt::Display for DateTime { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + if self.year > 9999 { + write!(f, "+{}", self.year)?; + } else if self.year < 0 { + write!(f, "{:05}", self.year)?; + } else { + write!(f, "{:04}", self.year)?; + } + + write!( + f, + "-{:02}-{:02}T{:02}:{:02}:{:02}.{:06}Z", + self.month, + self.day, + self.hour, + self.minute, + self.second, + self.nanos / 1_000 + ) + } +} + +impl From<std::time::SystemTime> for DateTime { + fn from(timestamp: std::time::SystemTime) -> DateTime { + let (t, nanos) = match timestamp.duration_since(std::time::UNIX_EPOCH) { + Ok(duration) => { + debug_assert!(duration.as_secs() <= std::i64::MAX as u64); + (duration.as_secs() as i64, duration.subsec_nanos()) + } + Err(error) => { + let duration = error.duration(); + debug_assert!(duration.as_secs() <= std::i64::MAX as u64); + let (secs, nanos) = (duration.as_secs() as i64, duration.subsec_nanos()); + if nanos == 0 { + (-secs, 0) + } else { + (-secs - 1, 1_000_000_000 - nanos) + } + } + }; + + // 2000-03-01 (mod 400 year, immediately after feb29 + const LEAPOCH: i64 = 946_684_800 + 86400 * (31 + 29); + const DAYS_PER_400Y: i32 = 365 * 400 + 97; + const DAYS_PER_100Y: i32 = 365 * 100 + 24; + const DAYS_PER_4Y: i32 = 365 * 4 + 1; + static DAYS_IN_MONTH: [i8; 12] = [31, 30, 31, 30, 31, 31, 30, 31, 30, 31, 31, 29]; + + // Note(dcb): this bit is rearranged slightly to avoid integer overflow. + let mut days: i64 = (t / 86_400) - (LEAPOCH / 86_400); + let mut remsecs: i32 = (t % 86_400) as i32; + if remsecs < 0i32 { + remsecs += 86_400; + days -= 1 + } + + let mut qc_cycles: i32 = (days / i64::from(DAYS_PER_400Y)) as i32; + let mut remdays: i32 = (days % i64::from(DAYS_PER_400Y)) as i32; + if remdays < 0 { + remdays += DAYS_PER_400Y; + qc_cycles -= 1; + } + + let mut c_cycles: i32 = remdays / DAYS_PER_100Y; + if c_cycles == 4 { + c_cycles -= 1; + } + remdays -= c_cycles * DAYS_PER_100Y; + + let mut q_cycles: i32 = remdays / DAYS_PER_4Y; + if q_cycles == 25 { + q_cycles -= 1; + } + remdays -= q_cycles * DAYS_PER_4Y; + + let mut remyears: i32 = remdays / 365; + if remyears == 4 { + remyears -= 1; + } + remdays -= remyears * 365; + + let mut years: i64 = i64::from(remyears) + + 4 * i64::from(q_cycles) + + 100 * i64::from(c_cycles) + + 400 * i64::from(qc_cycles); + + let mut months: i32 = 0; + while i32::from(DAYS_IN_MONTH[months as usize]) <= remdays { + remdays -= i32::from(DAYS_IN_MONTH[months as usize]); + months += 1 + } + + if months >= 10 { + months -= 12; + years += 1; + } + + DateTime { + year: years + 2000, + month: (months + 3) as u8, + day: (remdays + 1) as u8, + hour: (remsecs / 3600) as u8, + minute: (remsecs / 60 % 60) as u8, + second: (remsecs % 60) as u8, + nanos, + } + } +} + +#[cfg(test)] +mod tests { + use std::i32; + use std::time::{Duration, UNIX_EPOCH}; + + use super::*; + + #[test] + fn test_datetime() { + let case = |expected: &str, secs: i64, micros: u32| { + let timestamp = if secs >= 0 { + UNIX_EPOCH + Duration::new(secs as u64, micros * 1_000) + } else { + (UNIX_EPOCH - Duration::new(!secs as u64 + 1, 0)) + Duration::new(0, micros * 1_000) + }; + assert_eq!( + expected, + format!("{}", DateTime::from(timestamp)), + "secs: {}, micros: {}", + secs, + micros + ) + }; + + // Mostly generated with: + // - date -jur <secs> +"%Y-%m-%dT%H:%M:%S.000000Z" + // - http://unixtimestamp.50x.eu/ + + case("1970-01-01T00:00:00.000000Z", 0, 0); + + case("1970-01-01T00:00:00.000001Z", 0, 1); + case("1970-01-01T00:00:00.500000Z", 0, 500_000); + case("1970-01-01T00:00:01.000001Z", 1, 1); + case("1970-01-01T00:01:01.000001Z", 60 + 1, 1); + case("1970-01-01T01:01:01.000001Z", 60 * 60 + 60 + 1, 1); + case( + "1970-01-02T01:01:01.000001Z", + 24 * 60 * 60 + 60 * 60 + 60 + 1, + 1, + ); + + case("1969-12-31T23:59:59.000000Z", -1, 0); + case("1969-12-31T23:59:59.000001Z", -1, 1); + case("1969-12-31T23:59:59.500000Z", -1, 500_000); + case("1969-12-31T23:58:59.000001Z", -60 - 1, 1); + case("1969-12-31T22:58:59.000001Z", -60 * 60 - 60 - 1, 1); + case( + "1969-12-30T22:58:59.000001Z", + -24 * 60 * 60 - 60 * 60 - 60 - 1, + 1, + ); + + case("2038-01-19T03:14:07.000000Z", std::i32::MAX as i64, 0); + case("2038-01-19T03:14:08.000000Z", std::i32::MAX as i64 + 1, 0); + case("1901-12-13T20:45:52.000000Z", i32::MIN as i64, 0); + case("1901-12-13T20:45:51.000000Z", i32::MIN as i64 - 1, 0); + + // Skipping these tests on windows as std::time::SysteTime range is low + // on Windows compared with that of Unix which can cause the following + // high date value tests to panic + #[cfg(not(target_os = "windows"))] + { + case("+292277026596-12-04T15:30:07.000000Z", std::i64::MAX, 0); + case("+292277026596-12-04T15:30:06.000000Z", std::i64::MAX - 1, 0); + case("-292277022657-01-27T08:29:53.000000Z", i64::MIN + 1, 0); + } + + case("1900-01-01T00:00:00.000000Z", -2208988800, 0); + case("1899-12-31T23:59:59.000000Z", -2208988801, 0); + case("0000-01-01T00:00:00.000000Z", -62167219200, 0); + case("-0001-12-31T23:59:59.000000Z", -62167219201, 0); + + case("1234-05-06T07:08:09.000000Z", -23215049511, 0); + case("-1234-05-06T07:08:09.000000Z", -101097651111, 0); + case("2345-06-07T08:09:01.000000Z", 11847456541, 0); + case("-2345-06-07T08:09:01.000000Z", -136154620259, 0); + } +} |