[Boost-commit] svn:boost r61950 - in sandbox/SOC/2010/bit_masks: boost/integer boost/integer/details lib/integer/test

Subject: [Boost-commit] svn:boost r61950 - in sandbox/SOC/2010/bit_masks: boost/integer boost/integer/details lib/integer/test
From: bbartmanboost_at_[hidden]
Date: 2010-05-13 11:03:30

Author: bbartman
Date: 2010-05-13 11:03:29 EDT (Thu, 13 May 2010)
New Revision: 61950
URL: http://svn.boost.org/trac/boost/changeset/61950

Log:
working on creating high low meta functions
Added:
   sandbox/SOC/2010/bit_masks/boost/integer/details/high_low_impl.hpp   (contents, props changed)
Text files modified: 
   sandbox/SOC/2010/bit_masks/boost/integer/bit_width.hpp         |    27 +++++++++++++++++++++++++++             
   sandbox/SOC/2010/bit_masks/boost/integer/high_low_bits.hpp     |     9 ++++++++-                               
   sandbox/SOC/2010/bit_masks/lib/integer/test/Jamfile.v2         |     3 ++-                                     
   sandbox/SOC/2010/bit_masks/lib/integer/test/bit_width_test.cpp |    18 ++++++++++++++++++                      
   4 files changed, 55 insertions(+), 2 deletions(-)

Modified: sandbox/SOC/2010/bit_masks/boost/integer/bit_width.hpp
==============================================================================
--- sandbox/SOC/2010/bit_masks/boost/integer/bit_width.hpp	(original)
+++ sandbox/SOC/2010/bit_masks/boost/integer/bit_width.hpp	2010-05-13 11:03:29 EDT (Thu, 13 May 2010)
@@ -0,0 +1,27 @@
+//  (C) Copyright Brian Bartman 2010.
+//  Distributed under the Boost Software License, Version 1.0. (See
+//  accompanying file LICENSE_1_0.txt or copy at
+//  http://www.boost.org/LICENSE_1_0.txt)
+//  See http://www.boost.org for updates, documentation, and revision history. 
+
+#ifndef BOOST_INTEGRAL_BIT_WIDTH_HPP
+#define BOOST_INTEGRAL_BIT_WIDTH_HPP
+#include <boost/type_traits.hpp>
+#include <boost/integer/details/high_low_impl.hpp>
+
+
+namespace boost {
+
+/** bit_width is a meta function which returns the size of bits in size 
+ *  type T.
+ */
+template <typename T>
+struct bit_width
+    :integral_constant< unsigned int, (sizeof(T) * 8)>
+{
+    typedef bit_width<T> type;
+};
+
+} // namespace boost
+
+#endif

Added: sandbox/SOC/2010/bit_masks/boost/integer/details/high_low_impl.hpp
==============================================================================

Modified: sandbox/SOC/2010/bit_masks/boost/integer/high_low_bits.hpp
==============================================================================
--- sandbox/SOC/2010/bit_masks/boost/integer/high_low_bits.hpp	(original)
+++ sandbox/SOC/2010/bit_masks/boost/integer/high_low_bits.hpp	2010-05-13 11:03:29 EDT (Thu, 13 May 2010)
@@ -13,13 +13,20 @@
 
 namespace boost {
 
-template <typename T, T Width>
+
+/** Creates a mask of the supplied width in side type T, from the lower portion 
+ *  of the integer starting from the right most bit moving towards the left.
+ */
+template <typename T, unsigned int Width>
 struct low_bits
     :integral_constant<T, ~(~T(0) << Width) >
 {
+    
     typedef low_bits<T,Width>  type;
 };
 
+
+
 } // namespace boost 
 
 #endif

Modified: sandbox/SOC/2010/bit_masks/lib/integer/test/Jamfile.v2
==============================================================================
--- sandbox/SOC/2010/bit_masks/lib/integer/test/Jamfile.v2	(original)
+++ sandbox/SOC/2010/bit_masks/lib/integer/test/Jamfile.v2	2010-05-13 11:03:29 EDT (Thu, 13 May 2010)
@@ -11,7 +11,8 @@
         [ run mask_check.cpp ]
         [ run high_bit_mask_test.cpp ]
         [ run low_bit_mask_test.cpp ]
-        [ compile bit_mask_test.cpp ]
+        # [ compile bit_mask_test.cpp ]
+        [ run bit_width_test.cpp ]
     ;
 
 # run low_bit_mask_test.cpp

Modified: sandbox/SOC/2010/bit_masks/lib/integer/test/bit_width_test.cpp
==============================================================================
--- sandbox/SOC/2010/bit_masks/lib/integer/test/bit_width_test.cpp	(original)
+++ sandbox/SOC/2010/bit_masks/lib/integer/test/bit_width_test.cpp	2010-05-13 11:03:29 EDT (Thu, 13 May 2010)
@@ -0,0 +1,18 @@
+#include <boost/assert.hpp>
+#include <boost/type_traits.hpp>
+#include <boost/integer/bit_width.hpp>
+
+// tesitng for bit width.
+using namespace boost;
+
+
+
+int main() {
+    {
+        typedef bit_width<char> bw;
+        BOOST_ASSERT(( bw::value == 8 ));
+        BOOST_ASSERT(( is_same<bw::value_type, unsigned int>::value ));
+        BOOST_ASSERT(( is_same<bw::type, bw>::value ));
+    }
+    return 0;
+}