QtBigInt

QtBigInt - Arbitrary-sized integer class for C++ and build system cmake. Powered by minigmp 6.3.0.

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 6.3.0 library that provides high performance.

Documentation

The documentation and the API reference are hosted on GitHub Pages. The API reference is generated with Doxygen from the source code.

Include (cmake)

The cmake build does not require 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 including 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 is built 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

A complete, ready-to-compile example is available in examples/bigint_usage_example.cpp.

License

QtBigInt is distributed under the GNU Lesser General Public License v3.0 (LGPL-3.0).