1 | |
2 | |
3 | |
4 | |
5 | |
6 | |
7 | |
8 | |
9 | |
10 | |
11 | |
12 | |
13 | |
14 | |
15 | |
16 | |
17 | |
18 | |
19 | |
20 | |
21 | |
22 | |
23 | |
24 | |
25 | |
26 | |
27 | |
28 | |
29 | #ifdef HAVE_CONFIG_H1 |
30 | #include <config.h> |
31 | #endif |
32 | #include "IntrinsicI.h" |
33 | #include "CreateI.h" |
34 | |
35 | static void FreeBlockHookList( |
36 | Widget widget, |
37 | XtPointer closure, |
38 | XtPointer call_data) |
39 | { |
40 | BlockHook list = *(BlockHook*)closure; |
41 | while (list != NULL((void*)0)) { |
42 | BlockHook next = list->next; |
43 | XtFree( (XtPointer)list ); |
44 | list = next; |
45 | } |
46 | } |
47 | |
48 | |
49 | XtBlockHookId XtAppAddBlockHook( |
50 | XtAppContext app, |
51 | XtBlockHookProc proc, |
52 | XtPointer closure) |
53 | { |
54 | BlockHook hook = XtNew(BlockHookRec)((BlockHookRec *) XtMalloc((unsigned) sizeof(BlockHookRec))); |
55 | LOCK_APP(app)if(app && app->lock)(*app->lock)(app); |
| 1 | Within the expansion of the macro 'LOCK_APP':
| |
a | Assuming pointer value is null |
|
56 | hook->next = app->block_hook_list; |
| 2 | | Access to field 'block_hook_list' results in a dereference of a null pointer (loaded from variable 'app') |
|
57 | hook->app = app; |
58 | hook->proc = proc; |
59 | hook->closure = closure; |
60 | if (app->block_hook_list == NULL((void*)0)) { |
61 | _XtAddCallback( &app->destroy_callbacks, |
62 | FreeBlockHookList, |
63 | (XtPointer)&app->block_hook_list |
64 | ); |
65 | } |
66 | app->block_hook_list = hook; |
67 | UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app); |
68 | return (XtBlockHookId)hook; |
69 | } |
70 | |
71 | |
72 | void XtRemoveBlockHook( |
73 | XtBlockHookId id) |
74 | { |
75 | BlockHook *p, hook = (BlockHook)id; |
76 | XtAppContext app = hook->app; |
77 | LOCK_APP(app)if(app && app->lock)(*app->lock)(app); |
78 | for (p = &app->block_hook_list; p != NULL((void*)0) && *p != hook; p = &(*p)->next); |
79 | if (p == NULL((void*)0)) { |
80 | #ifdef DEBUG |
81 | XtAppWarningMsg(app, "badId", "xtRemoveBlockHook", XtCXtToolkitError, |
82 | "XtRemoveBlockHook called with bad or old hook id", |
83 | (String*)NULL((void*)0), (Cardinal*)NULL((void*)0)); |
84 | #endif /*DEBUG*/ |
85 | UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app); |
86 | return; |
87 | } |
88 | *p = hook->next; |
89 | XtFree( (XtPointer)hook ); |
90 | UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app); |
91 | } |
92 | |
93 | static void DeleteShellFromHookObj( |
94 | Widget shell, |
95 | XtPointer closure, |
96 | XtPointer call_data) |
97 | { |
98 | |
99 | Cardinal ii, jj; |
100 | HookObject ho = (HookObject) closure; |
101 | |
102 | for (ii = 0; ii < ho->hooks.num_shells; ii++) |
103 | if (ho->hooks.shells[ii] == shell) { |
104 | |
105 | for (jj = ii; jj < ho->hooks.num_shells; jj++) { |
106 | if ((jj+1) < ho->hooks.num_shells) |
107 | ho->hooks.shells[jj] = ho->hooks.shells[jj+1]; |
108 | } |
109 | break; |
110 | } |
111 | ho->hooks.num_shells--; |
112 | } |
113 | |
114 | #define SHELL_INCR4 4 |
115 | |
116 | void _XtAddShellToHookObj( |
117 | Widget shell) |
118 | { |
119 | |
120 | HookObject ho = (HookObject) XtHooksOfDisplay(XtDisplay(shell)(((shell)->core.screen)->display)); |
121 | |
122 | if (ho->hooks.num_shells == ho->hooks.max_shells) { |
123 | ho->hooks.max_shells += SHELL_INCR4; |
124 | ho->hooks.shells = |
125 | (WidgetList)XtRealloc((char*)ho->hooks.shells, |
126 | ho->hooks.max_shells * sizeof (Widget)); |
127 | } |
128 | ho->hooks.shells[ho->hooks.num_shells++] = shell; |
129 | |
130 | XtAddCallback(shell, XtNdestroyCallback((char*)&XtStrings[169]), DeleteShellFromHookObj, |
131 | (XtPointer)ho); |
132 | } |
133 | |
134 | Boolean _XtIsHookObject( |
135 | Widget widget) |
136 | { |
137 | return (widget->core.widget_class == hookObjectClass); |
138 | } |
139 | |
140 | Widget XtHooksOfDisplay( |
141 | Display* dpy) |
142 | { |
143 | Widget retval; |
144 | XtPerDisplay pd; |
145 | DPY_TO_APPCON(dpy)XtAppContext app = (_XtProcessLock ? XtDisplayToApplicationContext (dpy): ((void*)0)); |
146 | |
147 | LOCK_APP(app)if(app && app->lock)(*app->lock)(app); |
148 | pd = _XtGetPerDisplay(dpy); |
149 | if (pd->hook_object == NULL((void*)0)) |
150 | pd->hook_object = |
151 | _XtCreateHookObj((Screen*)DefaultScreenOfDisplay(dpy)(&((_XPrivDisplay)(dpy))->screens[(((_XPrivDisplay)(dpy ))->default_screen)])); |
152 | retval = pd->hook_object; |
153 | UNLOCK_APP(app)if(app && app->unlock)(*app->unlock)(app); |
154 | return retval; |
155 | } |