From 20431706a863f92cb37dc512fef6e48d192aaf2c Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Wed, 17 Apr 2024 14:11:38 +0200
Subject: Merging upstream version 1.66.0+dfsg1.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../tracing-subscriber-0.3.3/src/fmt/time/mod.rs   | 134 +++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 vendor/tracing-subscriber-0.3.3/src/fmt/time/mod.rs

(limited to 'vendor/tracing-subscriber-0.3.3/src/fmt/time/mod.rs')

diff --git a/vendor/tracing-subscriber-0.3.3/src/fmt/time/mod.rs b/vendor/tracing-subscriber-0.3.3/src/fmt/time/mod.rs
new file mode 100644
index 000000000..621df16e4
--- /dev/null
+++ b/vendor/tracing-subscriber-0.3.3/src/fmt/time/mod.rs
@@ -0,0 +1,134 @@
+//! Formatters for event timestamps.
+use crate::fmt::format::Writer;
+use std::fmt;
+use std::time::Instant;
+
+mod datetime;
+
+#[cfg(feature = "time")]
+mod time_crate;
+#[cfg(feature = "time")]
+#[cfg_attr(docsrs, doc(cfg(feature = "time")))]
+pub use time_crate::UtcTime;
+
+#[cfg(feature = "local-time")]
+#[cfg_attr(docsrs, doc(cfg(feature = "local-time")))]
+pub use time_crate::LocalTime;
+
+/// A type that can measure and format the current time.
+///
+/// This trait is used by `Format` to include a timestamp with each `Event` when it is logged.
+///
+/// Notable default implementations of this trait are `SystemTime` and `()`. The former prints the
+/// current time as reported by `std::time::SystemTime`, and the latter does not print the current
+/// time at all. `FormatTime` is also automatically implemented for any function pointer with the
+/// appropriate signature.
+///
+/// The full list of provided implementations can be found in [`time`].
+///
+/// [`time`]: ./index.html
+pub trait FormatTime {
+    /// Measure and write out the current time.
+    ///
+    /// When `format_time` is called, implementors should get the current time using their desired
+    /// mechanism, and write it out to the given `fmt::Write`. Implementors must insert a trailing
+    /// space themselves if they wish to separate the time from subsequent log message text.
+    fn format_time(&self, w: &mut Writer<'_>) -> fmt::Result;
+}
+
+/// Returns a new `SystemTime` timestamp provider.
+///
+/// This can then be configured further to determine how timestamps should be
+/// configured.
+///
+/// This is equivalent to calling
+/// ```rust
+/// # fn timer() -> tracing_subscriber::fmt::time::SystemTime {
+/// tracing_subscriber::fmt::time::SystemTime::default()
+/// # }
+/// ```
+pub fn time() -> SystemTime {
+    SystemTime::default()
+}
+
+/// Returns a new `Uptime` timestamp provider.
+///
+/// With this timer, timestamps will be formatted with the amount of time
+/// elapsed since the timestamp provider was constructed.
+///
+/// This can then be configured further to determine how timestamps should be
+/// configured.
+///
+/// This is equivalent to calling
+/// ```rust
+/// # fn timer() -> tracing_subscriber::fmt::time::Uptime {
+/// tracing_subscriber::fmt::time::Uptime::default()
+/// # }
+/// ```
+pub fn uptime() -> Uptime {
+    Uptime::default()
+}
+
+impl<'a, F> FormatTime for &'a F
+where
+    F: FormatTime,
+{
+    fn format_time(&self, w: &mut Writer<'_>) -> fmt::Result {
+        (*self).format_time(w)
+    }
+}
+
+impl FormatTime for () {
+    fn format_time(&self, _: &mut Writer<'_>) -> fmt::Result {
+        Ok(())
+    }
+}
+
+impl FormatTime for fn(&mut Writer<'_>) -> fmt::Result {
+    fn format_time(&self, w: &mut Writer<'_>) -> fmt::Result {
+        (*self)(w)
+    }
+}
+
+/// Retrieve and print the current wall-clock time.
+#[derive(Debug, Clone, Copy, Eq, PartialEq, Default)]
+pub struct SystemTime;
+
+/// Retrieve and print the relative elapsed wall-clock time since an epoch.
+///
+/// The `Default` implementation for `Uptime` makes the epoch the current time.
+#[derive(Debug, Clone, Copy, Eq, PartialEq)]
+pub struct Uptime {
+    epoch: Instant,
+}
+
+impl Default for Uptime {
+    fn default() -> Self {
+        Uptime {
+            epoch: Instant::now(),
+        }
+    }
+}
+
+impl From<Instant> for Uptime {
+    fn from(epoch: Instant) -> Self {
+        Uptime { epoch }
+    }
+}
+
+impl FormatTime for SystemTime {
+    fn format_time(&self, w: &mut Writer<'_>) -> fmt::Result {
+        write!(
+            w,
+            "{}",
+            datetime::DateTime::from(std::time::SystemTime::now())
+        )
+    }
+}
+
+impl FormatTime for Uptime {
+    fn format_time(&self, w: &mut Writer<'_>) -> fmt::Result {
+        let e = self.epoch.elapsed();
+        write!(w, "{:4}.{:09}s", e.as_secs(), e.subsec_nanos())
+    }
+}
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