LibM: Make roundf() and ceilf() slightly less terrible

These implementations still don't handle all of the corner cases that
are possible, but at least they are somewhat usable now.

1 files changed, 10 insertions, 4 deletions

diff --git a/Libraries/LibM/math.cpp b/Libraries/LibM/math.cpp
index 012d3e0ff8..51af8796ff 100644
--- a/Libraries/LibM/math.cpp
+++ b/Libraries/LibM/math.cpp
@@ -276,14 +276,20 @@ long double frexpl(long double, int*)
 
 float roundf(float value)
 {
-    // FIXME: Please fix me. I am sad.
-    return (int)value;
+    // FIXME: Please fix me. I am naive.
+    if (value >= 0.0f)
+        return (float)(int)(value + 0.5f);
+    return (float)(int)(value - 0.5f);
 }
 
 float ceilf(float value)
 {
-    // FIXME: Please fix me. I am sad.
-    return (int)value;
+    // FIXME: Please fix me. I am naive.
+    int as_int = (int)value;
+    if (value == (float)as_int) {
+        return (float)as_int;
+    }
+    return as_int + 1;
 }
 
 }