Add support for a user provided file system.

changelog.txt

@@ -4,6 +4,9 @@
 
 *** Changes after 2.7 ***
 FEATURE:	Added support for 128x32 SSD1306 based displays
+FIX:		Fixed recursion bug in console history
+FIX:		Multithreading issue with slow window redraws and large images
+FIX:		Ensure valid thread stack sizes on platforms where it matters
 
 
 *** Release 2.7 ***

src/gfile/gfile.c

@@ -16,6 +16,9 @@
  * Virtual file-systems that have special open() calls do not need to
  * be in this list.
  */
+#if GFILE_NEED_USERFS
+	extern const GFILEVMT FsUSERVMT;
+#endif
 #if GFILE_NEED_ROMFS
 	extern const GFILEVMT FsROMVMT;
 #endif
@@ -35,6 +38,9 @@
  * that they are searched to find a file.
  */
 static const GFILEVMT const * FsArray[] = {
+	#if GFILE_NEED_USERFS
+		&FsUSERVMT,
+	#endif
 	#if GFILE_NEED_ROMFS
 		&FsROMVMT,
 	#endif

src/gfile/gfile_options.h

@@ -75,6 +75,21 @@
 	#ifndef GFILE_NEED_STDIO
 		#define GFILE_NEED_STDIO		FALSE
 	#endif
+	/**
+	 * @brief   Include the USER file system
+	 * @details	Defaults to FALSE
+	 * @note	The User FS vmt strcture 'FsUSERVMT' must be defined and implemented in the user's project.
+	 * @note	If GFILE_ALLOW_DEVICESPECIFIC is on then you can ensure that you are
+	 * 			opening a file on the USER file system by prefixing
+	 * 			its name with "U|" (the letter 'U', followed by a vertical bar).
+	 *			The letter 'U' as described above should be replaced by the actual
+	 *			device specifier letter in the user's FsUSERVMT structure. It is suggested
+	 *			that it is actually the letter 'U' that is used and it is important that the letter
+	 *			used is not one used by the other file systems.
+	 */
+	#ifndef GFILE_NEED_USERFS
+		#define GFILE_NEED_USERFS		FALSE
+	#endif
 	/**
 	 * @brief   Include the ROM file system
 	 * @details	Defaults to FALSE