QtBigInt - Arbitrary-sized integer class for C++ and build system qmake and cmake. Power by minigmp.

Features

• No additional dependencies other than the standard library.
• Support for all arithmetic operators, which allows you to easily integrate the library into any of your algorithms.
• Based on the minigmp 6.1.2 library that provides high performance.

Build

• git clone https://github.com/QuasarApp/QtBigInt.git
• cd QtBigInt
• qmake -r
• make -j8
• make test #(for testing)

Include

For qmake projects

• cd yourRepo
• git submodule add https://github.com/QuasarApp/QtBigInt.git # add the repository of QtBigInt into your repo like submodule
• git submodule update --init --recursive
• Include in your pro file the pri file of QtBigInt library

  include($$PWD/QtBigInt/GMP.pri)

• Rebuild your project

For cmake projects

The cmake build do not required Qt libraries.

• cd yourRepo
• git submodule add https://github.com/QuasarApp/QtBigInt.git # add the repository of QtBigInt into your repo like submodule
• git submodule update --init --recursive
• Disable Building of tests (because tests require Qt libraries). Add before incuding of QtBigInt next line :

set(WITHOUT_TESTS 1)

• Include in your CMakeLists.txt file the main CMakeLists.txt file of QtBigInt library

add_subdirectory(QtBigInt)

• Rebuild your project

set(WITHOUT_TESTS 1)
add_subdirectory(QtBigInt)
target_link_libraries(MyBinary PUBLIC QtBigInt)

Note

By Default QtBigInt makes as a static library. If you want to create a shared library just add the BUILD_SHARED_LIBS into your main CMakeLists.txt file. Example :

set(BUILD_SHARED_LIBS ON)
set(WITHOUT_TESTS 1)
add_subdirectory(QtBigInt)
target_link_libraries(MyBinary PUBLIC QtBigInt)

For other build system

• cd yourRepo
• git submodule add https://github.com/QuasarApp/QtBigInt.git # add the repository of QtBigInt into your repo like submodule
• git submodule update --init --recursive
• Add the rule for build QtBigInt
• Add INCLUDEPATH and LIBS for your build system
• Rebuild your project

Usage

Create objects of the BigInt class, and do what you got to do!

#include <bigint.h>

BigInt big1 = 1234567890, big2;
big2 = "9876543210123456789098765432101234567890";

std::cout << (big1 * big2 * 123456).getString() << "\n";
// Output: 1505331490682966620443288524512589666204282352096057600