From 1b797548dff7e2475826ba29a71c3f496008988f Mon Sep 17 00:00:00 2001
From: Mike Buland <eichlan@xagasoft.com>
Date: Sat, 14 Aug 2010 07:12:29 +0000
Subject: libgats gets it's own repo.  The rest of the history is in my misc
 repo.

---
 src/integer.h | 78 +++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 78 insertions(+)
 create mode 100644 src/integer.h

(limited to 'src/integer.h')

diff --git a/src/integer.h b/src/integer.h
new file mode 100644
index 0000000..6ed7c49
--- /dev/null
+++ b/src/integer.h
@@ -0,0 +1,78 @@
+#ifndef GATS_INTEGER_H
+#define GATS_INTEGER_H
+
+#include "gats/object.h"
+
+#include <stdint.h>
+
+#include <bu/stream.h>
+
+namespace Gats
+{
+	class Integer : public Gats::Object
+	{
+	public:
+		Integer();
+		Integer( int64_t iVal );
+		virtual ~Integer();
+
+		virtual Type getType() const { return typeInteger; }
+		int64_t getValue() const { return iVal; }
+
+		virtual void write( Bu::Stream &rOut ) const;
+		virtual void read( Bu::Stream &rIn, char cType );
+
+		template<typename itype>
+		static void readPackedInt( Bu::Stream &rStream, itype &rOut )
+		{
+			int8_t b;
+			rOut = 0;
+			bool bNeg;
+
+			rStream.read( &b, 1 );
+			bNeg = ( b&0x40 );
+			rOut |= (itype(b&0x3F));
+			int c = 0;
+			while( (b&0x80) )
+			{
+				rStream.read( &b, 1 );
+				rOut |= (itype(b&0x7F)) << (6+7*(c++));
+			}
+			if( bNeg ) rOut = -rOut;
+		}
+
+		template<typename itype>
+		static void writePackedInt( Bu::Stream &rStream, itype iIn )
+		{
+			uint8_t b;
+
+			if( iIn < 0 )
+			{
+				iIn = -iIn;
+				b = (iIn&0x3F) | 0x40;
+			}
+			else
+			{
+				b = (iIn&0x3F);
+			}
+			if( iIn > b )
+				b |= 0x80;
+			rStream.write( &b, 1 );
+			iIn = iIn >> 6;
+
+			while( iIn )
+			{
+				b = (iIn&0x7F);
+				if( iIn > b )
+					b |= 0x80;
+				rStream.write( &b, 1 );
+				iIn = iIn >> 7;
+			}
+		}
+
+	private:
+		int64_t iVal;
+	};
+};
+
+#endif
-- 
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