---

yaml
---
r: 6143
b: refs/heads/master
c: 07ffe68
h: refs/heads/master
i:
  6141: f8c44d9
  6139: a034041
  6135: 516de31
  6127: cc75a57
  6111: 37cf4a2
  6079: c9ad0e2
  6015: b70bc0b
  5887: ab4c4a5
  5631: d667f7e
  5119: ab4679a
  4095: 1cb4a68
v: v3

Author: David Rajchenbach-Teller

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: f4399063fc2a3bd6e34bee185abfb6b56c4236a7
+refs/heads/master: 07ffe68ad9145a209725ac289f8c4235b4c9b334

trunk/src/lib/uint.rs

@@ -34,6 +34,29 @@ pure fn mul(x: uint, y: uint) -> uint { ret x * y; }
 /* Function: div */
 pure fn div(x: uint, y: uint) -> uint { ret x / y; }
 
+/**
+ * Divide two numbers, return the result, rounded up.
+ */
+pure fn div_ceil(x: uint, y: uint) -> uint {
+    let div = div(x, y);
+    if x % y == 0u { ret div;}
+    else { ret div + 1u; }
+}
+
+/**
+ * Divide two numbers, return the result, rounded to the closest integer.
+ */
+pure fn div_round(x: uint, y: uint) -> uint {
+    let div = div(x, y);
+    if x % y * 2u  < y { ret div;}
+    else { ret div + 1u; }
+}
+
+/**
+ * Divide two numbers, return the result, rounded down.
+ */
+pure fn div_floor(x: uint, y: uint) -> uint { ret x / y; }
+
 /* Function: rem */
 pure fn rem(x: uint, y: uint) -> uint { ret x % y; }
 

trunk/src/test/stdtest/uint.rs

@@ -102,3 +102,10 @@ fn test_overflows() {
    assert (uint::min_value() <= 0u);
    assert (uint::min_value() + uint::max_value() + 1u == 0u);
 }
+
+#[test]
+fn test_div() {
+    assert(uint::div_floor(3u, 4u) == 0u);
+    assert(uint::div_ceil(3u, 4u)  == 1u);
+    assert(uint::div_round(3u, 4u) == 1u);
+}