Library for stemming words down to their root words.

The recommended way to add this library to your project is by including the following to your CMakeLists.txt:

target_link_libraries(myProject oleanderstemminglibrary)

You may also add this library to your project using a relative path:

#include "oleanderstemminglibrary/include/olestem/stemming/english_stem.h"

An example of this project's usage can be found in tests/src/example.cpp and can be built with the following commands:

mkdir build && cd build
cmake ..
cmake --build .
./bin/ExampleTest

The license for this project can be found at LICENSE.md.

• Updated project for use as a header-only library with CMake.

• Updated Portuguese stemmer to new standard.

• Overhaul of Doxygen documentation.
• Updates to compile with GCC.
• Files are now UTF-8 (without BOM) encoded, which is compatible with Visual Studio 2008 and GCC. Note that this is no longer compatible with earlier versions of Visual Studio.

• Added Russian stemmer.
• Documentation expanded.

• Added support for smart apostrophes.

• Removed "common_lang_constants.cpp" so that the library now consists only of header files.

• All extended ASCII characters are written in numeric value, so that you can compile on GCC without needing to encode the source code files to UTF-8.
• Fixed a few access violations.
• Fixed a bug in step1 of the French stemmer.
• Updated the English and Spanish stemmers to the newer 2006 algorithms.
• General optimizations.

NOTE: This release is now only compatible with std::wstring (Unicode strings). If you need to stem an ANSI string, then convert it to a wstring using mbstowcs and then stem the wstring.

• Fixed a couple of bugs when compiling with GCC.

• Fixed an error when compiling with Visual Studio 2005.

• Added updates to English, Italian, Spanish, Norwegian, and Portuguese stemmers to include latest changes made to the Porter algorithms.
• Fixed case-sensitive comparison bug in Portuguese stemmer.
• Fixed bug in Portuguese stemmer where an "i" was sometimes incorrectly removed from the suffix.
• Fixed a bug in the English stemmer were some words ending in "e" would be incorrectly stemmed.
• Unicode now supported. If the symbol UNICODE is globally defined, stemmers now work with std::wstrings; otherwise, std::strings are expected.
• Removed template arguments for stemmers. Now you can just declare "english_stem EnglishStemmer;" instead of "english_stem EnglishStemmer;"and it will know whether to expect either std::wstring or std::string types based on whether UNICODE is enabled.
• Now licensed under the BSD license.
• Added more helper functions in utilities.h and string_util.h

• Fixed index bug in Dutch stemmer (wasn't checking size of string when it should have been).
• Fixed a compiler bug where a few inclusions were missing.
• Added "round" function to utility library for doing accurate integer rounding.
• Removed unused variable in English stemmer.
• Fixed compiler cast warning in "find_r2" function.
• Fixed access violation in "hash_german_yu", "hash_french_yui", and "hash_italian_ui" caused by one letter words.
• Fixed compiler error in stricmp function.
• Added "strstr" and "strcspn" char/wchar_t wrappers to string_util.h.
• Added "size_of_array" macro to utilities.h.
• Removed debugging hack code in "is_either" function in utilities.h.

• Fixed a couple of syntax errors in Finnish and French stemmers that GCC picked up.
• Added support for German variant algorithm, where umlauted words are expanded to the English equivalent.