1 files changed, 86 insertions, 0 deletions

diff --git a/c++-libbu++/src/integer.h b/c++-libbu++/src/integer.h
new file mode 100644
index 0000000..a5e0d58
--- /dev/null
+++ b/c++-libbu++/src/integer.h
@@ -0,0 +1,86 @@
+#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 Object *clone() const;
+
+                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);
+                                if( iIn > b )
+                                        b |= 0x80 | 0x40;
+                                else
+                                        b |= 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;
+        };
+};
+
+Bu::Formatter &operator<<( Bu::Formatter &f, const Gats::Integer &i );
+
+#endif