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 http://code.google.com/p/double-conversion

 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 src/double-conversion.h. Other examples can

 be found in test/cctest/test-conversions.cc.