Simplified clipboard API.

include/GL/glfw3.h

@@ -581,7 +581,7 @@ GLFWAPI int glfwGetJoystickButtons(int joy, unsigned char* buttons, int numbutto
 
 /* Clipboard */
 GLFWAPI void glfwSetClipboardString(GLFWwindow window, const char* string);
-GLFWAPI size_t glfwGetClipboardString(GLFWwindow window, char* string, size_t size);
+GLFWAPI const char* glfwGetClipboardString(GLFWwindow window);
 
 /* Time */
 GLFWAPI double glfwGetTime(void);

src/clipboard.c

@@ -59,19 +59,16 @@ GLFWAPI void glfwSetClipboardString(GLFWwindow handle, const char* string)
 // Return the current clipboard contents
 //========================================================================
 
-GLFWAPI size_t glfwGetClipboardString(GLFWwindow handle, char* string, size_t size)
+GLFWAPI const char* glfwGetClipboardString(GLFWwindow handle)
 {
     _GLFWwindow* window = (_GLFWwindow*) handle;
 
     if (!_glfwInitialized)
     {
         _glfwSetError(GLFW_NOT_INITIALIZED, NULL);
-        return 0;
+        return NULL;
     }
 
-    if (!string || !size)
-        return 0;
-
-    return _glfwPlatformGetClipboardString(window, string, size);
+    return _glfwPlatformGetClipboardString(window);
 }
 

src/cocoa_clipboard.m

@@ -56,7 +56,7 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
 // Return the current clipboard contents
 //========================================================================
 
-size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t size)
+const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
 {
     const char* source;
     size_t targetSize;
@@ -65,7 +65,7 @@ size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t
     if (![[pasteboard types] containsObject:NSStringPboardType])
     {
         _glfwSetError(GLFW_FORMAT_UNAVAILABLE, NULL);
-        return 0;
+        return NULL;
     }
 
     NSString* object = [pasteboard stringForType:NSStringPboardType];
@@ -73,15 +73,12 @@ size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t
     {
         _glfwSetError(GLFW_PLATFORM_ERROR,
                       "Cocoa/NSGL: Failed to retrieve object from pasteboard");
-        return 0;
+        return NULL;
     }
 
-    source = [object UTF8String];
-    targetSize = strlen(source) + 1;
-    if (targetSize > size)
-        targetSize = size;
+    free(_glfwLibrary.NS.clipboardString);
+    _glfwLibrary.NS.clipboardString = strdup([object UTF8String]);
 
-    strlcpy(string, source, targetSize);
-    return 0;
+    return _glfwLibrary.NS.clipboardString;
 }
 

src/cocoa_platform.h

@@ -95,6 +95,8 @@ typedef struct _GLFWlibraryNS
     CGEventSourceRef eventSource;
     id               delegate;
     id               autoreleasePool;
+
+    char*            clipboardString;
 } _GLFWlibraryNS;
 
 

src/internal.h

@@ -290,7 +290,7 @@ void _glfwPlatformSetGammaRamp(const GLFWgammaramp* ramp);
 
 // Clipboard
 void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string);
-size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char *data, size_t size);
+const char* _glfwPlatformGetClipboardString(_GLFWwindow* window);
 
 // Joystick
 int _glfwPlatformGetJoystickParam(int joy, int param);

src/win32_clipboard.c

@@ -94,23 +94,21 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
 // Return the current clipboard contents
 //========================================================================
 
-size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t size)
+const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
 {
     HANDLE stringHandle;
-    char* utf8String;
-    size_t utf8Size;
 
     if (!IsClipboardFormatAvailable(CF_UNICODETEXT))
     {
         _glfwSetError(GLFW_FORMAT_UNAVAILABLE, NULL);
-        return 0;
+        return NULL;
     }
 
     if (!OpenClipboard(window->Win32.handle))
     {
         _glfwSetError(GLFW_PLATFORM_ERROR,
                       "Win32/WGL: Failed to open clipboard");
-        return 0;
+        return NULL;
     }
 
     stringHandle = GetClipboardData(CF_UNICODETEXT);
@@ -120,30 +118,23 @@ size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t
 
         _glfwSetError(GLFW_PLATFORM_ERROR,
                       "Win32/WGL: Failed to retrieve clipboard data");
-        return 0;
+        return NULL;
     }
 
-    utf8String = _glfwCreateUTF8FromWideString(GlobalLock(stringHandle));
+    free(_glfwLibrary.Win32.clipboardString);
+    _glfwLibrary.Win32.clipboardString =
+        _glfwCreateUTF8FromWideString(GlobalLock(stringHandle));
+
     GlobalUnlock(stringHandle);
     CloseClipboard();
 
-    if (!utf8String)
+    if (!_glfwLibrary.Win32.clipboardString)
     {
         _glfwSetError(GLFW_PLATFORM_ERROR,
                       "Win32/WGL: Failed to convert wide string to UTF-8");
-        return 0;
-    }
-
-    utf8Size = strlen(utf8String) + 1;
-    if (utf8Size > size)
-    {
-        memcpy(string, utf8String, size);
-        string[size - 1] = '\0';
+        return NULL;
     }
-    else
-        memcpy(string, utf8String, utf8Size);
 
-    free(utf8String);
-	return utf8Size;
+    return _glfwLibrary.Win32.clipboardString;
 }
 

src/win32_platform.h

@@ -177,6 +177,7 @@ typedef struct _GLFWlibraryWin32
     ATOM                      classAtom;    // Window class atom
     HHOOK                     keyboardHook; // Keyboard hook handle
     DWORD                     foregroundLockTimeout;
+    char*                     clipboardString;
 
     // Default monitor
     struct {

src/x11_clipboard.c

@@ -152,10 +152,9 @@ void _glfwPlatformSetClipboardString(_GLFWwindow* window, const char* string)
 // Return the current clipboard contents
 //========================================================================
 
-size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t size)
+const char* _glfwPlatformGetClipboardString(_GLFWwindow* window)
 {
     int i;
-    size_t sourceSize, targetSize;
 
     _glfwLibrary.X11.selection.status = _GLFW_CONVERSION_INACTIVE;
 
@@ -184,18 +183,9 @@ size_t _glfwPlatformGetClipboardString(_GLFWwindow* window, char* string, size_t
     {
         _glfwSetError(GLFW_FORMAT_UNAVAILABLE,
                       "X11/GLX: Failed to convert selection to string");
-        return 0;
+        return NULL;
     }
 
-    sourceSize = strlen(_glfwLibrary.X11.selection.string) + 1;
-
-    targetSize = sourceSize;
-    if (targetSize > size)
-        targetSize = size;
-
-    memcpy(string, _glfwLibrary.X11.selection.string, targetSize);
-    string[targetSize - 1] = '\0';
-
-    return sourceSize;
+    return _glfwLibrary.X11.selection.string;
 }
 

tests/clipboard.c

@@ -59,16 +59,15 @@ static void key_callback(GLFWwindow window, int key, int action)
         case GLFW_KEY_V:
             if (control_is_down(window))
             {
-                char buffer[4096];
-                size_t size;
+                const char* string;
 
                 printf("Paste test.\n");
 
-                size = glfwGetClipboardString(window, buffer, sizeof(buffer));
-                if (size >= sizeof(buffer))
-                    printf("Buffer wasn't big enough to hold clipboard data.\n");
+                string = glfwGetClipboardString(window);
+                if (!string)
+                    printf("Failed to retrieve clipboard string\n");
 
-                printf("[%lu]: %s\n", (unsigned long) size, buffer);
+                printf("%s\n", string);
             }
             break;