Fixes GetClipboardText() memory leak for PLATFORM_DESKTOP_SDL (#4354)

src/platforms/rcore_desktop_sdl.c

@@ -57,6 +57,13 @@
     #include "SDL_opengl.h"     // SDL OpenGL functionality (if required, instead of internal renderer)
 #endif
 
+//----------------------------------------------------------------------------------
+// Defines and Macros
+//----------------------------------------------------------------------------------
+#ifndef MAX_CLIPBOARD_BUFFER_LENGTH
+    #define MAX_CLIPBOARD_BUFFER_LENGTH 1024 // Size of the clipboard buffer used on GetClipboardText()
+#endif
+
 //----------------------------------------------------------------------------------
 // Types and Structures Definition
 //----------------------------------------------------------------------------------
@@ -852,10 +859,22 @@ void SetClipboardText(const char *text)
 }
 
 // Get clipboard text content
-// NOTE: returned string must be freed with SDL_free()
 const char *GetClipboardText(void)
 {
-    return SDL_GetClipboardText();
+    static char buffer[MAX_CLIPBOARD_BUFFER_LENGTH] = { 0 };
+
+    char *clipboard = SDL_GetClipboardText();
+
+    int clipboardSize = snprintf(buffer, sizeof(buffer), "%s", clipboard);
+    if (clipboardSize >= MAX_CLIPBOARD_BUFFER_LENGTH)
+    {
+        char *truncate = buffer + MAX_CLIPBOARD_BUFFER_LENGTH - 4;
+        sprintf(truncate, "...");
+    }
+
+    SDL_free(clipboard);
+
+    return buffer;
 }
 
 // Show mouse cursor