From 2fc2651226baac27029e38c9d6ef883fa32084db Mon Sep 17 00:00:00 2001
From: Steve Block <steveblock@google.com>
Date: Wed, 18 May 2011 13:36:51 +0100
Subject: Merge WebKit at r78450: Initial merge by git.

Change-Id: I6d3e5f1f868ec266a0aafdef66182ddc3f265dc1
---
 Source/JavaScriptCore/wtf/MathExtras.h | 28 ++++++++++++++++++++++++++++
 1 file changed, 28 insertions(+)

(limited to 'Source/JavaScriptCore/wtf/MathExtras.h')

diff --git a/Source/JavaScriptCore/wtf/MathExtras.h b/Source/JavaScriptCore/wtf/MathExtras.h
index 095549e..ec27f5f 100644
--- a/Source/JavaScriptCore/wtf/MathExtras.h
+++ b/Source/JavaScriptCore/wtf/MathExtras.h
@@ -26,8 +26,10 @@
 #ifndef WTF_MathExtras_h
 #define WTF_MathExtras_h
 
+#include <algorithm>
 #include <cmath>
 #include <float.h>
+#include <limits>
 #include <stdlib.h>
 
 #if OS(SOLARIS)
@@ -205,6 +207,32 @@ inline float deg2turn(float d) { return d / 360.0f; }
 inline float rad2grad(float r) { return r * 200.0f / piFloat; }
 inline float grad2rad(float g) { return g * piFloat / 200.0f; }
 
+inline int clampToInteger(double d)
+{
+    const double minIntAsDouble = std::numeric_limits<int>::min();
+    const double maxIntAsDouble = std::numeric_limits<int>::max();
+    return static_cast<int>(std::max(std::min(d, maxIntAsDouble), minIntAsDouble));
+}
+
+inline int clampToPositiveInteger(double d)
+{
+    const double maxIntAsDouble = std::numeric_limits<int>::max();
+    return static_cast<int>(std::max<double>(std::min(d, maxIntAsDouble), 0));
+}
+
+inline int clampToInteger(float d)
+{
+    const float minIntAsFloat = static_cast<float>(std::numeric_limits<int>::min());
+    const float maxIntAsFloat = static_cast<float>(std::numeric_limits<int>::max());
+    return static_cast<int>(std::max(std::min(d, maxIntAsFloat), minIntAsFloat));
+}
+
+inline int clampToPositiveInteger(float d)
+{
+    const float maxIntAsFloat = static_cast<float>(std::numeric_limits<int>::max());
+    return static_cast<int>(std::max<float>(std::min(d, maxIntAsFloat), 0));
+}
+
 #if !COMPILER(MSVC) && !COMPILER(WINSCW) && !(COMPILER(RVCT) && (OS(SYMBIAN) || PLATFORM(BREWMP)))
 using std::isfinite;
 using std::isinf;
-- 
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