Documenting Apache 2.0

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Apache 2.0 uses Doxygen to document the APIs and global variables in the the code. This will explain the basics of how to document using Doxygen.

Brief Description

To start a documentation block, use /**
To end a documentation block, use */

In the middle of the block, there are multiple tags we can use:

Description of this functions purpose @param parameter_name description @return description @deffunc signature of the function

The deffunc is not always necessary. DoxyGen does not have a full parser in it, so any prototype that use a macro in the return type declaration is too complex for scandoc. Those functions require a deffunc. An example (using > rather than >):

/** * return the final element of the pathname * @param pathname The path to get the final element of * @return the final element of the path * @tip Examples: * <pre> * "/foo/bar/gum" -> "gum" * "/foo/bar/gum/" -> "" * "gum" -> "gum" * "wi\\n32\\stuff" -> "stuff" * </pre> * @deffunc const char * ap_filename_of_pathname(const char *pathname) */

At the top of the header file, always include:

/** * @package Name of library header */

Doxygen uses a new HTML file for each package. The HTML files are named {Name_of_library_header}.html, so try to be concise with your names.

For a further discussion of the possibilities please refer to the Doxygen site.