Added SDL_HapticIndex.

include/SDL_haptic.h

@@ -636,11 +636,25 @@ extern DECLSPEC const char *SDLCALL SDL_HapticName(int device_index);
  *    \param device_index Index of the device to open.
  *    \return Device identifier or NULL on error.
  *
+ * \sa SDL_HapticIndex
  * \sa SDL_HapticOpenFromJoystick
  * \sa SDL_HapticClose
  */
 extern DECLSPEC SDL_Haptic * SDL_HapticOpen(int device_index);
 
+
+/**
+ * \fn int SDL_HapticIndex(SDL_Haptic * haptic)
+ *
+ * \brief Gets the index of a haptic device.
+ *
+ *    \param haptic Haptic device to get the index of.
+ *    \return The index of the haptic device or -1 on error.
+ *
+ * \sa SDL_HapticOpen
+ */
+extern DECLSPEC int SDL_HapticIndex(SDL_Haptic * haptic);
+
 /**
  * \fn int SDL_JoystickIsHaptic(SDL_Joystick * joystick)
  *

src/haptic/SDL_haptic.c

@@ -58,6 +58,24 @@ SDL_HapticInit(void)
 }
 
 
+/*
+ * Checks to see if the haptic device is valid
+ */
+static int
+ValidHaptic(SDL_Haptic ** haptic)
+{
+   int valid;
+
+   if (*haptic == NULL) {
+      SDL_SetError("Haptic device hasn't been opened yet");
+      valid = 0;
+   } else {
+      valid = 1;
+   }
+   return valid;
+}
+
+
 /*
  * Returns the number of available devices.
  */
@@ -130,6 +148,20 @@ SDL_HapticOpen(int device_index)
 }
 
 
+/*
+ * Returns the index to a haptic device.
+ */
+int
+SDL_HapticIndex(SDL_Haptic * haptic)
+{
+   if (!ValidHaptic(&haptic)) {
+      return -1;
+   }
+
+   return haptic->index;
+}
+
+
 /*
  * Returns SDL_TRUE if joystick has haptic features.
  */
@@ -203,24 +235,6 @@ SDL_HapticOpenFromJoystick(SDL_Joystick * joystick)
 }
 
 
-/*
- * Checks to see if the haptic device is valid
- */
-static int
-ValidHaptic(SDL_Haptic ** haptic)
-{
-   int valid;
-
-   if (*haptic == NULL) {
-      SDL_SetError("Haptic device hasn't been opened yet");
-      valid = 0;
-   } else {
-      valid = 1;
-   }
-   return valid;
-}
-
-
 /*
  * Closes a SDL_Haptic device.
  */