Clone this repo:


  1. ada6dbf Initial empty repository by Casey Hillers · 2 years, 8 months ago master
  2. 1623566 Consistently require a semicolon after DOUBLE_CONVERSION_ASSERT (#164) by Nico Weber · 2 years, 10 months ago
  3. 44944ac Fix various typos (#163) by luzpaz · 3 years ago
  4. 32bc443 add support for a new architecture loongarch. (#162) by houfangdong · 3 years, 2 months ago
  5. eee1a45 Add `StringToDoubleConverter::StringTo<T>` member function templates (#158) by Niels Dekker · 3 years, 3 months ago

This project (double-conversion) provides binary-decimal and decimal-binary routines for IEEE doubles.

The library consists of efficient conversion routines that have been extracted from the V8 JavaScript engine. The code has been refactored and improved so that it can be used more easily in other projects.

There is extensive documentation in double-conversion/string-to-double.h and double-conversion/double-to-string.h. Other examples can be found in test/cctest/


This library can be built with scons or cmake. The checked-in Makefile simply forwards to scons, and provides a shortcut to run all tests:

make test


The easiest way to install this library is to use scons. It builds the static and shared library, and is set up to install those at the correct locations:

scons install

Use the DESTDIR option to change the target directory:

scons DESTDIR=alternative_directory install


To use cmake run cmake . in the root directory. This overwrites the existing Makefile.

Use -DBUILD_SHARED_LIBS=ON to enable the compilation of shared libraries. Note that this disables static libraries. There is currently no way to build both libraries at the same time with cmake.

Use -DBUILD_TESTING=ON to build the test executable.

test/cctest/cctest --list | tr -d '<' | xargs test/cctest/cctest