Mirrors_UI_SDK/fltk
1
0
Fork 0
mirror of https://github.com/fltk/fltk.git synced 2026-05-20 12:41:27 +08:00
Code Issues Actions 2 Packages Projects Releases Wiki Activity

Avoid crash in Fl::next_window(win)

Browse Source 
As documented, Fl::next_window(win) must only be called with a valid
*shown* window. The old code would crash if the argument was NULL
or the window was not shown.

The new code avoids the crash, issues an error message, and returns
NULL to the caller.
This commit is contained in:
Albrecht Schlosser
2020-06-02 14:53:36 +02:00
parent 930013638b
commit c12408b53f
1 changed files with 6 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/Fl.cxx
+6 -1
View File
@@ -659,7 +659,12 @@ Fl_Window* Fl::first_window() {
\param[in] window must be shown and not NULL
*/
Fl_Window* Fl::next_window(const Fl_Window* window) {
Fl_X* i = Fl_X::i(window)->next;
Fl_X* i = window ? Fl_X::i(window) : 0;
if (!i) {
Fl::error("Fl::next_window() failed: window (%p) not shown.", window);
return 0;
}
i = i->next;
return i ? i->w : 0;
}