From 6eabc833869d8181de827f07990068af672a8962 Mon Sep 17 00:00:00 2001
From: Michael Lotz <mmlr@mlotz.ch>
Date: Sun, 5 Jun 2011 23:53:04 +0000
Subject: [PATCH] Add HIDReportItem::ScaledFloatData() which scales the data
 into a float range from 0.0 to 1.0.

git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@41948 a95241bf-73f2-0310-859d-f6bbb57e9c96
---
 .../kernel/drivers/input/usb_hid/HIDReportItem.cpp   | 12 ++++++++++++
 .../kernel/drivers/input/usb_hid/HIDReportItem.h     |  1 +
 2 files changed, 13 insertions(+)

diff --git a/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.cpp b/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.cpp
index e014df2715..5f937a6c11 100644
--- a/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.cpp
+++ b/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.cpp
@@ -146,6 +146,18 @@ HIDReportItem::ScaledData(uint8 scaleToBits, bool toBeSigned)
 }
 
 
+float
+HIDReportItem::ScaledFloatData()
+{
+	if (Signed()) {
+		return (double)((int32)fData - (int32)fMinimum)
+			/ (fMaximum - (int32)fMinimum);
+	}
+
+	return (double)(fData - fMinimum) / (fMaximum - fMinimum);
+}
+
+
 void
 HIDReportItem::PrintToStream(uint32 indentLevel)
 {
diff --git a/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.h b/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.h
index ed1cf63501..23238b5bec 100644
--- a/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.h
+++ b/src/add-ons/kernel/drivers/input/usb_hid/HIDReportItem.h
@@ -37,6 +37,7 @@ public:
 		uint32					Data() { return fData; };
 
 		uint32					ScaledData(uint8 scaleToBits, bool toBeSigned);
+		float					ScaledFloatData();
 
 		bool					Valid() { return fValid; };