Question 1

How to normalize a UTF-8 string to NFC using utf8proc?

Accepted Answer

Use the utf8proc_NFC function provided in the library, passing your UTF-8 string. It returns a normalized version, but remember to free the allocated memory with utf8proc_free, as shown in the README examples.

Question 2

utf8proc vs ICU: which is better for Unicode processing?

Accepted Answer

utf8proc is lighter and focuses on core operations like normalization and case-folding, ideal for embedded systems. ICU is more comprehensive but larger, suitable for applications needing full Unicode support such as collation or locale-specific rules.

Question 3

What Unicode version does utf8proc support?

Accepted Answer

utf8proc supports Unicode 17.0.0, as stated in the README. It is regularly updated to keep pace with new Unicode releases, ensuring compatibility with modern characters like emoji.

Question 4

How to install utf8proc on Windows?

Accepted Answer

On Windows, use CMake for compilation. Follow the README instructions: create a build directory, run cmake commands, and build the library. Pre-built releases are also available for download to simplify installation.

Question 5

Is utf8proc thread-safe?

Accepted Answer

The library is designed for thread-safe read-only operations, but functions that allocate memory may require synchronization in multi-threaded environments. Check the header file for specific guidance, as it's a common concern with C libraries.

Question 6

Can utf8proc handle case-insensitive string comparison?

Accepted Answer

Yes, use the UTF8PROC_CASEFOLD option with utf8proc_map to convert strings to a case-folded form, enabling case-insensitive comparisons. The README provides an example with the German sharp S (ß) folding to 'ss'.

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