iniparser

The library is extremely small, with only about 1500 lines of code across four files, making it ideal for embedded systems and resource-constrained environments.

Written in strict ANSI C with no external libraries required, it ensures high portability and ease of integration across various platforms.

Fully re-entrant and designed for thread safety; the README notes that library calls can be made thread-safe by surrounding them with mutexes.

Supports advanced INI features like sections, multi-line values, quoted strings, and inline comments, providing robustness for diverse configuration needs.

Offers intuitive accessor functions (e.g., iniparser_getstring, iniparser_getint) for retrieving configuration data in various types, simplifying usage.