user32: Use the given string length when converting strings in WM_GETTEXT.

dlls/user32/tests/win.c

@@ -6932,10 +6932,8 @@ static void test_gettext(void)
     memset( bufW, 0x1c, sizeof(bufW) );
     g_wm_gettext_override.dont_terminate = TRUE;
     buf_len = GetWindowTextW( hwnd, bufW, sizeof(bufW)/sizeof(bufW[0]) );
-todo_wine
     ok( buf_len == 4, "Unexpected text length, %d\n", buf_len );
     ok( !memcmp(bufW, textW, 4 * sizeof(WCHAR)), "Unexpected window text, %s\n", wine_dbgstr_w(bufW) );
-todo_wine
     ok( bufW[4] == 0, "Unexpected buffer contents, %#x\n", bufW[4] );
     g_wm_gettext_override.dont_terminate = FALSE;
 
@@ -6945,10 +6943,8 @@ todo_wine
     memset( buf, 0x1c, sizeof(buf) );
     g_wm_gettext_override.dont_terminate = TRUE;
     buf_len = GetWindowTextA( hwnd2, buf, sizeof(buf) );
-todo_wine
     ok( buf_len == 4, "Unexpected text length, %d\n", buf_len );
     ok( !memcmp(buf, "text", 4), "Unexpected window text, '%s'\n", buf );
-todo_wine
     ok( buf[4] == 0, "Unexpected buffer contents, %#x\n", buf[4] );
     g_wm_gettext_override.dont_terminate = FALSE;
 

dlls/user32/winproc.c

@@ -460,7 +460,7 @@ LRESULT WINPROC_CallProcAtoW( winproc_callback_t callback, HWND hwnd, UINT msg,
             {
                 len = 0;
                 if (*result)
-                    RtlUnicodeToMultiByteN( str, wParam - 1, &len, ptr, strlenW(ptr) * sizeof(WCHAR) );
+                    RtlUnicodeToMultiByteN( str, wParam - 1, &len, ptr, ret * sizeof(WCHAR) );
                 str[len] = 0;
                 *result = len;
             }
@@ -682,7 +682,7 @@ static LRESULT WINPROC_CallProcWtoA( winproc_callback_t callback, HWND hwnd, UIN
             {
                 if (*result)
                 {
-                    RtlMultiByteToUnicodeN( (LPWSTR)lParam, wParam*sizeof(WCHAR), &len, ptr, strlen(ptr)+1 );
+                    RtlMultiByteToUnicodeN( (LPWSTR)lParam, wParam*sizeof(WCHAR), &len, ptr, ret + 1 );
                     *result = len/sizeof(WCHAR) - 1;  /* do not count terminating null */
                 }
                 ((LPWSTR)lParam)[*result] = 0;