Ogonek is a C++ library for Unicode support. The goal is to support all the algorithms described in the Unicode Standard, with a focus on correctness and on the use of modern C++.
Ogonek’s design is driven by the following principles.
- validity and correctness
Ogonek values validity and correctness above speed and other concerns. The semantics of operations are defined as much as possible by the Unicode Standard and its standard annexes (UAX), technical standards (UTS), and technical reports (UTR).
Ideally it should be impossible to obtain invalid Unicode data after any operation provided by Ogonek.
- modern C++
- Ogonek uses modern C++ techniques as much as possible. At any given point, the minimum required level of standard C++ support is the C++ standard version before the latest, starting with C++14.
- explicit is better than implicit
Ogonek performs as little as possible implicitly. If the users don’t want to care about certain details, they don’t care about correctness, and thus they probably don’t need ogonek.
Specifically, Ogonek does not silently perform encoding conversions, and does not assume any encoding except for
char32_t(which are clearly intended by the standard as UTF-16 and UTF-32 code units); anything else needs to be made explicit.
- fail fast
- Ogonek does not let errors go away silently. When appropriate, the API accepts error handling callbacks; in all other scenarios exceptions are thrown.
- be a good citizen
- Ogonek works well with the standard library, by providing and using models of the existing standard concepts, like iterators and containers.
Ogonek depends on the following third-party libraries.
Ogonek version numbers use the semantic versioning 2.0.0 rules.
Each Ogonek release is tied to a specific Unicode version. This is unavoidable because Unicode updates may require changes not only in the Unicode character data, but also in the algorithms. Because of this, arbitrarily mixing Ogonek versions and Unicode versions is not supported.
At any given time, Ogonek supports the two latest released Unicode major versions, starting with Unicode 9.0.0.
The source code of Ogonek is dedicated to the public domain. Where not applicable, source code is licensed under the terms of the CC0 1.0 Universal public domain dedication.
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Ogonek means “little tail” in Polish. It is the name of a diacritic used in several European and Native American languages. It exists in the Unicode repertoire as a combining character (U+0328 ᴄᴏᴍʙɪɴɪɴɢ ᴏɢᴏɴᴇᴋ), as an isolated character (U+02DB ᴏɢᴏɴᴇᴋ), or precomposed with Latin alphabet letters (like U+01EA ʟᴀᴛɪɴ ᴄᴀᴘɪᴛᴀʟ ʟᴇᴛᴛᴇʀ ᴏ ᴡɪᴛʜ ᴏɢᴏɴᴇᴋ).
The name was picked randomly and it has absolutely no special meaning as the name of this project. It is just a label the author appropriated for it. In English it is pronounced /ˈoʊɡənɛk/.