From 2e90f7f8b975d380c3d544995ef6db9d6c8a86d8 Mon Sep 17 00:00:00 2001
From: frosch <frosch@openttd.org>
Date: Sun, 18 Apr 2010 14:56:05 +0000
Subject: (svn r19670) -Codechange: Add CeilDiv() and RoundDiv() to simplify
 integer divisions with rounding.

---
 src/core/math_func.hpp | 22 ++++++++++++++++++++++
 1 file changed, 22 insertions(+)

(limited to 'src/core')

diff --git a/src/core/math_func.hpp b/src/core/math_func.hpp
index d57a3a511..8f31dd273 100644
--- a/src/core/math_func.hpp
+++ b/src/core/math_func.hpp
@@ -318,4 +318,26 @@ static FORCEINLINE uint ToPercent16(uint i)
 int LeastCommonMultiple(int a, int b);
 int GreatestCommonDivisor(int a, int b);
 
+/**
+ * Computes ceil(a / b) for non-negative a and b.
+ * @param a Numerator
+ * @param b Denominator
+ * @return Quotient, rounded up
+ */
+static FORCEINLINE uint CeilDiv(uint a, uint b)
+{
+	return (a + b - 1) / b;
+}
+
+/**
+ * Computes round(a / b) for non-negative a and b.
+ * @param a Numerator
+ * @param b Denominator
+ * @return Quotient, rounded to nearest
+ */
+static FORCEINLINE uint RoundDiv(uint a, uint b)
+{
+	return (a + b / 2) / b;
+}
+
 #endif /* MATH_FUNC_HPP */
-- 
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