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Bitfield: And then mess things up again by handling signed fields. 

This is way more messy than it should be.
This commit is contained in:
Scott Mansell 2015-10-30 14:05:14 +13:00
parent 9125ab8304
commit f0e5232fe0
1 changed files with 49 additions and 0 deletions
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49
Source/Core/Common/BitField.natvis
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@ -8,4 +8,53 @@
<Item Name="Size">$T2</Item> <Item Name="Size">$T2</Item>
</Expand> </Expand>
</Type> </Type>
<!--Specialised versions for signed types-->
<Type Name="BitField&lt;*,*,__int64&gt;">
<!-- This is what I have do to get a sign extension in this crappy natvis "language"
Basically, we check the top bit, if it's one, we add the remaining
bits to the smallest (most negitive) number. -->
<DisplayString Condition="(storage &amp; (1 &lt;&lt; ($T1 + $T2))) != 0">
<![CDATA[{(-1 * (1 << ($T2-1))) + ((storage >> $T1) & ((1 << ($T2-1)) - 1))}]]>
</DisplayString>
<DisplayString><![CDATA[{(storage >> $T1) & ((1 << ($T2-1)) - 1)}]]></DisplayString>
<Expand>
<Item Name="Offset">$T1</Item>
<Item Name="Size">$T2</Item>
</Expand>
</Type>
<!-- Oh, and I can't do a generic match for all signed types, so these are identical to the __int64 case above
Would be nice if std::numeric_limits<$T3>::is_signed or std::is_signed<$T3>::value worked -->
<Type Name="BitField&lt;*,*,__int32&gt;">
<DisplayString Condition="(storage &amp; (1 &lt;&lt; ($T1 + $T2))) != 0">
<![CDATA[{(-1 * (1 << ($T2-1))) + ((storage >> $T1) & ((1 << ($T2-1)) - 1))}]]>
</DisplayString>
<DisplayString><![CDATA[{(storage >> $T1) & ((1 << ($T2-1)) - 1)}]]></DisplayString>
<Expand>
<Item Name="Offset">$T1</Item>
<Item Name="Size">$T2</Item>
</Expand>
</Type>
<Type Name="BitField&lt;*,*,__int16&gt;">
<DisplayString Condition="(storage &amp; (1 &lt;&lt; ($T1 + $T2))) != 0">
<![CDATA[{(-1 * (1 << ($T2-1))) + ((storage >> $T1) & ((1 << ($T2-1)) - 1))}]]>
</DisplayString>
<DisplayString><![CDATA[{(storage >> $T1) & ((1 << ($T2-1)) - 1)}]]></DisplayString>
<Expand>
<Item Name="Offset">$T1</Item>
<Item Name="Size">$T2</Item>
</Expand>
</Type>
<Type Name="BitField&lt;*,*,__int8&gt;">
<DisplayString Condition="(storage &amp; (1 &lt;&lt; ($T1 + $T2))) != 0">
<![CDATA[{(-1 * (1 << ($T2-1))) + ((storage >> $T1) & ((1 << ($T2-1)) - 1))}]]>
</DisplayString>
<DisplayString><![CDATA[{(storage >> $T1) & ((1 << ($T2-1)) - 1)}]]></DisplayString>
<Expand>
<Item Name="Offset">$T1</Item>
<Item Name="Size">$T2</Item>
</Expand>
</Type>
</AutoVisualizer> </AutoVisualizer>