1 files changed, 24 insertions, 0 deletions
diff --git a/third_party/rust/image/src/math/utils.rs b/third_party/rust/image/src/math/utils.rs
new file mode 100644
index 0000000000..1ddea5dbc2
--- /dev/null
+++ b/third_party/rust/image/src/math/utils.rs
@@ -0,0 +1,24 @@
+//! Shared mathematical utility functions.
+
+/// Cut value to be inside given range
+///
+/// ```
+/// use image::math::utils;
+///
+/// assert_eq!(utils::clamp(-5, 0, 10),  0);
+/// assert_eq!(utils::clamp( 6, 0, 10),  6);
+/// assert_eq!(utils::clamp(15, 0, 10), 10);
+/// ```
+#[inline]
+pub fn clamp<N>(a: N, min: N, max: N) -> N
+where
+    N: PartialOrd,
+{
+    if a < min {
+        return min;
+    }
+    if a > max {
+        return max;
+    }
+    a
+}