Adds SDL_GameControllerAddMappingsFromRW, updates controllermap

SDL_GameControllerAddMappingsFromFile is now a convenience macro.

controllermap can now skip bindings by pressing space or clicking/touching the
screen.

include/SDL_gamecontroller.h

@@ -109,12 +109,21 @@ typedef struct SDL_GameControllerButtonBind
  */
 
 /**
- *  Load a set of mappings from a file, filtered by the current SDL_GetPlatform()
+ *  Load a set of mappings from a seekable SDL data stream (memory or file), filtered by the current SDL_GetPlatform()
  *  A community sourced database of controllers is available at https://raw.github.com/gabomdq/SDL_GameControllerDB/master/gamecontrollerdb.txt
  *
+ *  If \c freerw is non-zero, the stream will be closed after being read.
+ * 
  * \return number of mappings added, -1 on error
  */
-extern DECLSPEC int SDLCALL SDL_GameControllerAddMappingsFromFile( const char* mapDB );
+extern DECLSPEC int SDLCALL SDL_GameControllerAddMappingsFromRW( SDL_RWops * rw, int freerw );
+
+/**
+ *  Load a set of mappings from a file, filtered by the current SDL_GetPlatform()
+ *
+ *  Convenience macro.
+ */
+#define SDL_GameControllerAddMappingsFromFile(file)   SDL_GameControllerAddMappingsFromRW(SDL_RWFromFile(file, "rb"), 1)
 
 /**
  *  Add or update an existing mapping configuration

src/joystick/SDL_gamecontroller.c

@@ -658,32 +658,37 @@ void SDL_PrivateGameControllerRefreshMapping( ControllerMapping_t *pControllerMa
  * Add or update an entry into the Mappings Database
  */
 int
-SDL_GameControllerAddMappingsFromFile( const char* mapDB )
+SDL_GameControllerAddMappingsFromRW( SDL_RWops * rw, int freerw )
 {
     const char *platform = SDL_GetPlatform();
-    SDL_RWops *rw;
     int controllers = 0;
     char *buf, *line, *line_end, *tmp, *comma, line_platform[64];
     size_t db_size, platform_len;
     
-    rw = SDL_RWFromFile(mapDB, "rb");
     if (rw == NULL) {
-        return SDL_SetError("Could not open %s", mapDB);
+        return SDL_SetError("Invalid RWops");
     }
     db_size = SDL_RWsize(rw);
     
     buf = (char *) SDL_malloc(db_size + 1);
     if (buf == NULL) {
+        if (freerw) {
             SDL_RWclose(rw);
+        }
         return SDL_SetError("Could allocate space to not read DB into memory");
     }
     
     if (SDL_RWread(rw, buf, db_size, 1) != 1) {
+        if (freerw) {
             SDL_RWclose(rw);
+        }
         SDL_free(buf);
         return SDL_SetError("Could not read DB");
     }
+    
+    if (freerw) {
         SDL_RWclose(rw);
+    }
     
     buf[db_size] = '\0';
     line = buf;

test/controllermap.c

@@ -144,7 +144,7 @@ WatchJoystick(SDL_Joystick * joystick)
     };
 
     /* Create a window to display joystick axis position */
-    window = SDL_CreateWindow("Joystick Test", SDL_WINDOWPOS_CENTERED,
+    window = SDL_CreateWindow("Game Controller Map", SDL_WINDOWPOS_CENTERED,
                               SDL_WINDOWPOS_CENTERED, SCREEN_WIDTH,
                               SCREEN_HEIGHT, 0);
     if (window == NULL) {
@@ -178,6 +178,7 @@ WatchJoystick(SDL_Joystick * joystick)
     Press the buttons on your controller when indicated\n\
     (Your controller may look different than the picture)\n\
     If you want to correct a mistake, press backspace or the back button on your device\n\
+    To skip a button, press SPACE or click/touch the screen\n\
     To exit, press ESC\n\
     ====================================================================================\n");
     
@@ -287,6 +288,12 @@ WatchJoystick(SDL_Joystick * joystick)
                         next=SDL_TRUE;
                     }
                     break;
+                case SDL_FINGERDOWN:
+                case SDL_MOUSEBUTTONDOWN:
+                    /* Skip this step */
+                    s++;
+                    next=SDL_TRUE;
+                    break;
                 case SDL_KEYDOWN:
                     if (event.key.keysym.sym == SDLK_BACKSPACE || event.key.keysym.sym == SDLK_AC_BACK) {
                         /* Undo! */
@@ -297,12 +304,17 @@ WatchJoystick(SDL_Joystick * joystick)
                         }
                         break;
                     }
+                    if (event.key.keysym.sym == SDLK_SPACE) {
+                        /* Skip this step */
+                        s++;
+                        next=SDL_TRUE;
+                        break;
+                    }
+                    
                     if ((event.key.keysym.sym != SDLK_ESCAPE)) {
                         break;
                     }
                     /* Fall through to signal quit */
-                case SDL_FINGERDOWN:
-                case SDL_MOUSEBUTTONDOWN:
                 case SDL_QUIT:
                     done = SDL_TRUE;
                     break;