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authorfrosch <frosch@openttd.org>2010-04-18 14:56:05 +0000
committerfrosch <frosch@openttd.org>2010-04-18 14:56:05 +0000
commit2e90f7f8b975d380c3d544995ef6db9d6c8a86d8 (patch)
tree90fb0852bd31229b016ca998a8e6c0ce44d699dd /src/core
parent2330851d1dc0650335bc73ec4cfd010f08c55742 (diff)
downloadopenttd-2e90f7f8b975d380c3d544995ef6db9d6c8a86d8.tar.xz
(svn r19670) -Codechange: Add CeilDiv() and RoundDiv() to simplify integer divisions with rounding.
Diffstat (limited to 'src/core')
-rw-r--r--src/core/math_func.hpp22
1 files changed, 22 insertions, 0 deletions
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 */