added CMake option USE_BOOST_INT128 to use a 128-bit integer for `M…

…athLib:big{u}int` [skip ci] Co-authored-by: chrchr-github <[email protected]>
danmar · Nov 21, 2024 · 598582d · 598582d
1 parent 9c3a1f6
commit 598582d
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diff --git a/cmake/compilerDefinitions.cmake b/cmake/compilerDefinitions.cmake
@@ -35,6 +35,9 @@ endif()
 
 if(Boost_FOUND)
     add_definitions(-DHAVE_BOOST)
+    if(USE_BOOST_INT128)
+        add_definitions(-DHAVE_BOOST_INT128)
+    endif()
 endif()
 
 if(ENABLE_CHECK_INTERNAL)

diff --git a/cmake/options.cmake b/cmake/options.cmake
@@ -67,6 +67,7 @@ endif()
 option(CPPCHK_GLIBCXX_DEBUG "Usage of STL debug checks in Debug build"                      ON)
 option(DISALLOW_THREAD_EXECUTOR "Disallow usage of ThreadExecutor for -j"                   OFF)
 option(USE_BOOST            "Usage of Boost"                                                OFF)
+option(USE_BOOST_INT128     "Usage of Boost.Multiprecision 128-bit integer for Mathlib"     OFF)
 option(USE_LIBCXX           "Use libc++ instead of libstdc++"                               OFF)
 
 if(DISALLOW_THREAD_EXECUTOR AND WIN32)

diff --git a/cmake/printInfo.cmake b/cmake/printInfo.cmake
@@ -95,6 +95,7 @@ if(USE_BOOST)
     message(STATUS "Boost_FOUND =           ${Boost_FOUND}")
     message(STATUS "Boost_VERSION_STRING =  ${Boost_VERSION_STRING}")
     message(STATUS "Boost_INCLUDE_DIRS =    ${Boost_INCLUDE_DIRS}")
+    message(STATUS "USE_BOOST_INT128 =      ${USE_BOOST_INT128}")
 endif()
 message(STATUS "USE_LIBCXX =            ${USE_LIBCXX}")
 message(STATUS)

diff --git a/lib/mathlib.h b/lib/mathlib.h
@@ -26,6 +26,10 @@
 #include <cstdint>
 #include <string>
 
+#if defined(HAVE_BOOST) && defined(HAVE_BOOST_INT128)
+#include <boost/multiprecision/cpp_int.hpp>
+#endif
+
 /// @addtogroup Core
 /// @{
 
@@ -66,8 +70,13 @@ class CPPCHECKLIB MathLib {
         value shiftRight(const value &v) const;
     };
 
+#if defined(HAVE_BOOST) && defined(HAVE_BOOST_INT128)
+    using bigint = boost::multiprecision::int128_t;
+    using biguint = boost::multiprecision::uint128_t;
+#else
     using bigint = long long;
     using biguint = unsigned long long;
+#endif
     static const int bigint_bits;
 
     /** @brief for conversion of numeric literals - for atoi-like conversions please use strToInt() */