From bdf6f3d5f18289400d2cdcca4df40027d36a48b9 Mon Sep 17 00:00:00 2001
From: Joona Aalto <jondolf.dev@gmail.com>
Date: Tue, 25 Mar 2025 06:18:00 +0200
Subject: [PATCH] Add `no_std` compatible `ceil` method (#18498)

# Objective


[`f32::ceil`](https://doc.rust-lang.org/std/primitive.f32.html#method.ceil)
is not available in `core`. We have `floor` in `bevy_math::ops`, but no
equivalent for `floor`.

## Solution

Add `ops::ceil` for `no_std` compatibility.
---
 crates/bevy_math/clippy.toml |  1 +
 crates/bevy_math/src/ops.rs  | 16 ++++++++++++++++
 2 files changed, 17 insertions(+)

diff --git a/crates/bevy_math/clippy.toml b/crates/bevy_math/clippy.toml
index 0fb122e4dc..c1f67e044d 100644
--- a/crates/bevy_math/clippy.toml
+++ b/crates/bevy_math/clippy.toml
@@ -34,5 +34,6 @@ disallowed-methods = [
   { path = "f32::copysign", reason = "use ops::copysign instead for no_std compatibility" },
   { path = "f32::round", reason = "use ops::round instead for no_std compatibility" },
   { path = "f32::floor", reason = "use ops::floor instead for no_std compatibility" },
+  { path = "f32::ceil", reason = "use ops::ceil instead for no_std compatibility" },
   { path = "f32::fract", reason = "use ops::fract instead for no_std compatibility" },
 ]
diff --git a/crates/bevy_math/src/ops.rs b/crates/bevy_math/src/ops.rs
index e9d27ac54a..6d39bbbfd4 100644
--- a/crates/bevy_math/src/ops.rs
+++ b/crates/bevy_math/src/ops.rs
@@ -510,6 +510,14 @@ mod libm_ops_for_no_std {
         libm::floorf(x)
     }
 
+    /// Returns the smallest integer greater than or equal to `x`.
+    ///
+    /// Precision is specified when the `libm` feature is enabled.
+    #[inline(always)]
+    pub fn ceil(x: f32) -> f32 {
+        libm::ceilf(x)
+    }
+
     /// Returns the fractional part of `x`.
     ///
     /// This function always returns the precise result.
@@ -581,6 +589,14 @@ mod std_ops_for_no_std {
         f32::floor(x)
     }
 
+    /// Returns the smallest integer greater than or equal to `x`.
+    ///
+    /// This function always returns the precise result.
+    #[inline(always)]
+    pub fn ceil(x: f32) -> f32 {
+        f32::ceil(x)
+    }
+
     /// Returns the fractional part of `x`.
     ///
     /// This function always returns the precise result.