LibreOffice
LibreOffice 6.2 SDK C/C++ API Reference
Modules
Here is a list of all modules:
 AssertionsAssertions (cond is bool, msg is char*)
 File types
 File attributes
 Flags specifying which fields to retrieve by osl_getFileStatus
 Volume attributes
 Flags specifying which fields to retrieve by osl_getVolumeInfo