Function physfs_sys::PHYSFS_getPrefDir

pub unsafe extern "C" fn PHYSFS_getPrefDir(
    org: *const c_char, 
    app: *const c_char
) -> *const c_char

\fn const char *PHYSFS_getPrefDir(const char *org, const char *app) \brief Get the user-and-app-specific path where files can be written.

Helper function.

Get the “pref dir”. This is meant to be where users can write personal files (preferences and save games, etc) that are specific to your application. This directory is unique per user, per application.

This function will decide the appropriate location in the native filesystem, create the directory if necessary, and return a string in platform-dependent notation, suitable for passing to PHYSFS_setWriteDir().

On Windows, this might look like: “C:\Users\bob\AppData\Roaming\My Company\My Program Name”

On Linux, this might look like: “/home/bob/.local/share/My Program Name”

On Mac OS X, this might look like: “/Users/bob/Library/Application Support/My Program Name”

(etc.)

You should probably use the pref dir for your write dir, and also put it near the beginning of your search path. Older versions of PhysicsFS offered only PHYSFS_getUserDir() and left you to figure out where the files should go under that tree. This finds the correct location for whatever platform, which not only changes between operating systems, but also versions of the same operating system.

You specify the name of your organization (if it’s not a real organization, your name or an Internet domain you own might do) and the name of your application. These should be proper names.

Both the (org) and (app) strings may become part of a directory name, so please follow these rules:

• Try to use the same org string (including case-sensitivity) for all your applications that use this function.
• Always use a unique app string for each one, and make sure it never changes for an app once you’ve decided on it.
• Unicode characters are legal, as long as it’s UTF-8 encoded, but…
• …only use letters, numbers, and spaces. Avoid punctuation like “Game Name 2: Bad Guy’s Revenge!” … “Game Name 2” is sufficient.

The pointer returned by this function remains valid until you call this function again, or call PHYSFS_deinit(). This is not necessarily a fast call, though, so you should call this once at startup and copy the string if you need it.

You should assume the path returned by this function is the only safe place to write files (and that PHYSFS_getUserDir() and PHYSFS_getBaseDir(), while they might be writable, or even parents of the returned path, aren’t where you should be writing things).

\param org The name of your organization. \param app The name of your application. \return READ ONLY string of user dir in platform-dependent notation. NULL if there’s a problem (creating directory failed, etc).

\sa PHYSFS_getBaseDir \sa PHYSFS_getUserDir