Update SDL2 to 2.0.16

code/SDL2/include/SDL_filesystem.h

@@ -1,6 +1,6 @@
 /*
   Simple DirectMedia Layer
-  Copyright (C) 1997-2020 Sam Lantinga <slouken@libsdl.org>
+  Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
 
   This software is provided 'as-is', without any express or implied
   warranty.  In no event will the authors be held liable for any damages
@@ -38,88 +38,97 @@ extern "C" {
 #endif
 
 /**
- * \brief Get the path where the application resides.
+ * Get the directory where the application was run from.
  *
- * Get the "base path". This is the directory where the application was run
- *  from, which is probably the installation directory, and may or may not
- *  be the process's current working directory.
+ * This is not necessarily a fast call, so you should call this once near
+ * startup and save the string if you need it.
  *
- * This returns an absolute path in UTF-8 encoding, and is guaranteed to
- *  end with a path separator ('\\' on Windows, '/' most other places).
+ * **Mac OS X and iOS Specific Functionality**: If the application is in a
+ * ".app" bundle, this function returns the Resource directory (e.g.
+ * MyApp.app/Contents/Resources/). This behaviour can be overridden by adding
+ * a property to the Info.plist file. Adding a string key with the name
+ * SDL_FILESYSTEM_BASE_DIR_TYPE with a supported value will change the
+ * behaviour.
  *
- * The pointer returned by this function is owned by you. Please call
- *  SDL_free() on the pointer when you are done with it, or it will be a
- *  memory leak. This is not necessarily a fast call, though, so you should
- *  call this once near startup and save the string if you need it.
+ * Supported values for the SDL_FILESYSTEM_BASE_DIR_TYPE property (Given an
+ * application in /Applications/SDLApp/MyApp.app):
  *
- * Some platforms can't determine the application's path, and on other
- *  platforms, this might be meaningless. In such cases, this function will
- *  return NULL.
+ * - `resource`: bundle resource directory (the default). For example:
+ *   `/Applications/SDLApp/MyApp.app/Contents/Resources`
+ * - `bundle`: the Bundle directory. Fpr example:
+ *   `/Applications/SDLApp/MyApp.app/`
+ * - `parent`: the containing directory of the bundle. For example:
+ *   `/Applications/SDLApp/`
  *
- *  \return String of base dir in UTF-8 encoding, or NULL on error.
+ * The returned path is guaranteed to end with a path separator ('\' on
+ * Windows, '/' on most other platforms).
+ *
+ * The pointer returned is owned by the caller. Please call SDL_free() on the
+ * pointer when done with it.
+ *
+ * \returns an absolute path in UTF-8 encoding to the application data
+ *          directory. NULL will be returned on error or when the platform
+ *          doesn't implement this functionality, call SDL_GetError() for more
+ *          information.
+ *
+ * \since This function is available since SDL 2.0.1.
  *
  * \sa SDL_GetPrefPath
  */
 extern DECLSPEC char *SDLCALL SDL_GetBasePath(void);
 
 /**
- * \brief Get the user-and-app-specific path where files can be written.
+ * Get the user-and-app-specific path where files can be written.
  *
  * 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.
+ * 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 of the absolute
- *  path to the directory in UTF-8 encoding.
+ * This function will decide the appropriate location in the native
+ * filesystem, create the directory if necessary, and return a string of the
+ * absolute path to the directory in UTF-8 encoding.
  *
  * On Windows, the string might look like:
- *  "C:\\Users\\bob\\AppData\\Roaming\\My Company\\My Program Name\\"
  *
- * On Linux, the string might look like:
- *  "/home/bob/.local/share/My Program Name/"
+ * `C:\\Users\\bob\\AppData\\Roaming\\My Company\\My Program Name\\`
+ *
+ * On Linux, the string might look like"
+ *
+ * `/home/bob/.local/share/My Program Name/`
  *
  * On Mac OS X, the string might look like:
- *  "/Users/bob/Library/Application Support/My Program Name/"
  *
- * (etc.)
+ * `/Users/bob/Library/Application Support/My Program Name/`
  *
- * 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 untranslated proper names.
+ * You should assume the path returned by this function is the only safe place
+ * to write files (and that SDL_GetBasePath(), while it might be writable, or
+ * even the parent of the returned path, isn't where you should be writing
+ * things).
  *
- * Both the org and app strings may become part of a directory name, so
- *  please follow these rules:
+ * 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.
+ * - 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.
  *
- * This returns an absolute path in UTF-8 encoding, and is guaranteed to
- *  end with a path separator ('\\' on Windows, '/' most other places).
+ * The returned path is guaranteed to end with a path separator ('\' on
+ * Windows, '/' on most other platforms).
  *
- * The pointer returned by this function is owned by you. Please call
- *  SDL_free() on the pointer when you are done with it, or it will be a
- *  memory leak. This is not necessarily a fast call, though, so you should
- *  call this once near startup and save the string if you need it.
+ * The pointer returned is owned by the caller. Please call SDL_free() on the
+ * pointer when done with it.
  *
- * You should assume the path returned by this function is the only safe
- *  place to write files (and that SDL_GetBasePath(), while it might be
- *  writable, or even the parent 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
+ * \returns a UTF-8 string of the user directory in platform-dependent
+ *          notation. NULL if there's a problem (creating directory failed,
+ *          etc.).
  *
- * Some platforms can't determine the pref path, and on other
- *  platforms, this might be meaningless. In such cases, this function will
- *  return NULL.
- *
- *   \param org The name of your organization.
- *   \param app The name of your application.
- *  \return UTF-8 string of user dir in platform-dependent notation. NULL
- *          if there's a problem (creating directory failed, etc).
+ * \since This function is available since SDL 2.0.1.
  *
  * \sa SDL_GetBasePath
  */