clipboard: SDL_GetClipboardText() now follows the SDL_GetStringRule.

Reference Issue #10229.

include/SDL3/SDL_clipboard.h

@@ -57,22 +57,22 @@ extern "C" {
 extern SDL_DECLSPEC int SDLCALL SDL_SetClipboardText(const char *text);
 
 /**
- * Get UTF-8 text from the clipboard, which must be freed with SDL_free().
+ * Get UTF-8 text from the clipboard.
  *
  * This functions returns empty string if there was not enough memory left for
  * a copy of the clipboard's content.
  *
+ * The returned string follows the SDL_GetStringRule.
+ *
  * \returns the clipboard text on success or an empty string on failure; call
- *          SDL_GetError() for more information. Caller must call SDL_free()
- *          on the returned pointer when done with it (even if there was an
- *          error).
+ *          SDL_GetError() for more information.
  *
  * \since This function is available since SDL 3.0.0.
  *
  * \sa SDL_HasClipboardText
  * \sa SDL_SetClipboardText
  */
-extern SDL_DECLSPEC char * SDLCALL SDL_GetClipboardText(void);
+extern SDL_DECLSPEC const char * SDLCALL SDL_GetClipboardText(void);
 
 /**
  * Query whether the clipboard exists and contains a non-empty text string.

src/dynapi/SDL_dynapi_procs.h

@@ -233,7 +233,7 @@ SDL_DYNAPI_PROC(SDL_PropertiesID,SDL_GetCameraProperties,(SDL_Camera *a),(a),ret
 SDL_DYNAPI_PROC(SDL_CameraSpec*,SDL_GetCameraSupportedFormats,(SDL_CameraID a, int *b),(a,b),return)
 SDL_DYNAPI_PROC(SDL_CameraID*,SDL_GetCameras,(int *a),(a),return)
 SDL_DYNAPI_PROC(void*,SDL_GetClipboardData,(const char *a, size_t *b),(a,b),return)
-SDL_DYNAPI_PROC(char*,SDL_GetClipboardText,(void),(),return)
+SDL_DYNAPI_PROC(const char*,SDL_GetClipboardText,(void),(),return)
 SDL_DYNAPI_PROC(const SDL_DisplayMode*,SDL_GetClosestFullscreenDisplayMode,(SDL_DisplayID a, int b, int c, float d, SDL_bool e),(a,b,c,d,e),return)
 SDL_DYNAPI_PROC(const char*,SDL_GetCurrentAudioDriver,(void),(),return)
 SDL_DYNAPI_PROC(const char*,SDL_GetCurrentCameraDriver,(void),(),return)

src/test/SDL_test_common.c

@@ -2278,13 +2278,12 @@ int SDLTest_CommonEventMainCallbacks(SDLTest_CommonState *state, const SDL_Event
                     SDLTest_PasteScreenShot();
                 } else {
                     /* Ctrl-V paste awesome text! */
-                    char *text = SDL_GetClipboardText();
+                    const char *text = SDL_GetClipboardText();
                     if (*text) {
                         SDL_Log("Clipboard: %s\n", text);
                     } else {
                         SDL_Log("Clipboard is empty\n");
                     }
-                    SDL_free(text);
                 }
             }
             break;

src/video/SDL_clipboard.c

@@ -282,29 +282,31 @@ int SDL_SetClipboardText(const char *text)
     return SDL_ClearClipboardData();
 }
 
-char *SDL_GetClipboardText(void)
+const char *SDL_GetClipboardText(void)
 {
     SDL_VideoDevice *_this = SDL_GetVideoDevice();
     size_t i, num_mime_types;
     const char **text_mime_types;
     size_t length;
-    char *text = NULL;
+    const char *text = NULL;
 
     if (!_this) {
         SDL_SetError("Video subsystem must be initialized to get clipboard text");
-        return SDL_strdup("");
+        return "";
     }
 
     text_mime_types = SDL_GetTextMimeTypes(_this, &num_mime_types);
     for (i = 0; i < num_mime_types; ++i) {
-        text = (char *)SDL_GetClipboardData(text_mime_types[i], &length);
-        if (text) {
+        void *clipdata = SDL_GetClipboardData(text_mime_types[i], &length);
+        if (clipdata) {
+            text = (const char *) clipdata;
+            SDL_FreeLater(clipdata);  // returned string follows the SDL_GetStringRule.
             break;
         }
     }
 
     if (!text) {
-        text = SDL_strdup("");
+        text = "";
     }
     return text;
 }

test/testautomation_clipboard.c

@@ -163,12 +163,11 @@ static int clipboard_testClipboardDataFunctions(void *arg)
         clipboard_cleanup_count - last_clipboard_cleanup_count);
 
     expected_text = "TEST";
-    text = SDL_GetClipboardText();
+    text = (char *) SDL_GetClipboardText();
     SDLTest_AssertCheck(
         text && SDL_strcmp(text, expected_text) == 0,
         "Verify clipboard text, expected \"%s\", got \"%s\"",
         expected_text, text);
-    SDL_free(text);
 
     boolResult = SDL_HasClipboardData(test_mime_types[TEST_MIME_TYPE_TEXT]);
     SDLTest_AssertCheck(
@@ -265,12 +264,11 @@ static int clipboard_testClipboardDataFunctions(void *arg)
         clipboard_cleanup_count - last_clipboard_cleanup_count);
 
     expected_text = "TEST";
-    text = SDL_GetClipboardText();
+    text = (char *) SDL_GetClipboardText();
     SDLTest_AssertCheck(
         text && SDL_strcmp(text, expected_text) == 0,
         "Verify clipboard text, expected \"%s\", got \"%s\"",
         expected_text, text);
-    SDL_free(text);
 
     boolResult = SDL_HasClipboardData(test_mime_types[TEST_MIME_TYPE_TEXT]);
     SDLTest_AssertCheck(
@@ -386,7 +384,7 @@ static int clipboard_testClipboardTextFunctions(void *arg)
     char *text = SDL_strdup(textRef);
     SDL_bool boolResult;
     int intResult;
-    char *charResult;
+    const char *charResult;
     int last_clipboard_update_count;
 
     SDL_AddEventWatch(ClipboardEventWatch, NULL);
@@ -403,7 +401,6 @@ static int clipboard_testClipboardTextFunctions(void *arg)
         charResult && SDL_strcmp(charResult, "") == 0,
         "Verify SDL_GetClipboardText returned \"\", got %s",
         charResult);
-    SDL_free(charResult);
     boolResult = SDL_HasClipboardText();
     SDLTest_AssertCheck(
         boolResult == SDL_FALSE,
@@ -436,7 +433,6 @@ static int clipboard_testClipboardTextFunctions(void *arg)
         charResult && SDL_strcmp(textRef, charResult) == 0,
         "Verify SDL_GetClipboardText returned correct string, expected '%s', got '%s'",
         textRef, charResult);
-    SDL_free(charResult);
     SDLTest_AssertCheck(
         clipboard_update_count == last_clipboard_update_count + 1,
         "Verify clipboard update count incremented by 1, got %d",

test/testcontroller.c

@@ -680,14 +680,13 @@ static void CopyMapping(void)
 static void PasteMapping(void)
 {
     if (controller) {
-        char *mapping = SDL_GetClipboardText();
+        const char *mapping = SDL_GetClipboardText();
         if (MappingHasBindings(mapping)) {
             StopBinding();
-            SetAndFreeGamepadMapping(mapping);
+            SDL_SetGamepadMapping(controller->id, mapping);
             RefreshControllerName();
         } else {
             /* Not a valid mapping, ignore it */
-            SDL_free(mapping);
         }
     }
 }
@@ -743,7 +742,7 @@ static void CopyControllerName(void)
 static void PasteControllerName(void)
 {
     SDL_free(controller_name);
-    controller_name = SDL_GetClipboardText();
+    controller_name = SDL_strdup(SDL_GetClipboardText());
     CommitControllerName();
 }