Initial vendor packages

Signed-off-by: Valentin Popov <valentin@popov.link>

1 files changed, 59 insertions, 0 deletions

diff --git a/vendor/owo-colors/src/overrides.rs b/vendor/owo-colors/src/overrides.rs
new file mode 100644
index 0000000..538b6db
--- /dev/null
+++ b/vendor/owo-colors/src/overrides.rs
@@ -0,0 +1,59 @@
+use core::sync::atomic::{AtomicU8, Ordering};
+
+/// Set an override value for whether or not colors are supported.
+///
+/// If `true` is passed, [`if_supports_color`](crate::OwoColorize::if_supports_color) will always
+/// act as if colors are supported.
+///
+/// If `false` is passed, [`if_supports_color`](crate::OwoColorize::if_supports_color) will always
+/// act as if colors are **not** supported.
+///
+/// This behavior can be disabled using [`unset_override`], allowing `owo-colors` to return to
+/// inferring if colors are supported.
+#[cfg(feature = "supports-colors")]
+pub fn set_override(enabled: bool) {
+    OVERRIDE.set_force(enabled)
+}
+
+/// Remove any override value for whether or not colors are supported. This means
+/// [`if_supports_color`](crate::OwoColorize::if_supports_color) will resume checking if the given
+/// terminal output ([`Stream`](crate::Stream)) supports colors.
+///
+/// This override can be set using [`set_override`].
+#[cfg(feature = "supports-colors")]
+pub fn unset_override() {
+    OVERRIDE.unset()
+}
+
+pub(crate) static OVERRIDE: Override = Override::none();
+
+pub(crate) struct Override(AtomicU8);
+
+const FORCE_MASK: u8 = 0b10;
+const FORCE_ENABLE: u8 = 0b11;
+const FORCE_DISABLE: u8 = 0b10;
+const NO_FORCE: u8 = 0b00;
+
+impl Override {
+    const fn none() -> Self {
+        Self(AtomicU8::new(NO_FORCE))
+    }
+
+    fn inner(&self) -> u8 {
+        self.0.load(Ordering::SeqCst)
+    }
+
+    pub(crate) fn is_force_enabled_or_disabled(&self) -> (bool, bool) {
+        let inner = self.inner();
+
+        (inner == FORCE_ENABLE, inner == FORCE_DISABLE)
+    }
+
+    fn set_force(&self, enable: bool) {
+        self.0.store(FORCE_MASK | (enable as u8), Ordering::SeqCst)
+    }
+
+    fn unset(&self) {
+        self.0.store(0, Ordering::SeqCst);
+    }
+}