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Handle Panel_getSelected() returning NULL

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Found by compiling with LTO:

    ColumnsPanel.c: In function ‘ColumnsPanel_eventHandler’:
    ColumnsPanel.c:46:59: error: potential null pointer dereference [-Werror=null-dereference]
       46 |             ((ListItem*)Panel_getSelected(super))->moving = this->moving;
          |                                                           ^
    AvailableColumnsPanel.c: In function ‘AvailableColumnsPanel_eventHandler’:
    AvailableColumnsPanel.c:31:8: error: potential null pointer dereference [-Werror=null-dereference]
       31 |    int key = ((ListItem*) Panel_getSelected(super))->key;
          |        ^
    AvailableMetersPanel.c: In function ‘AvailableMetersPanel_eventHandler’:
    AvailableMetersPanel.c:40:24: error: potential null pointer dereference [-Werror=null-dereference]
       40 |    int param = selected->key & 0xff;
          |                        ^
    linux/IOPriorityPanel.c: In function ‘IOPriorityPanel_getIOPriority’:
    linux/IOPriorityPanel.c:37:11: error: potential null pointer dereference [-Werror=null-dereference]
       37 |    return (IOPriority) ( ((ListItem*) Panel_getSelected(this))->key );
          |           ^
This commit is contained in:
Christian Göttsche
2020-10-05 18:27:55 +02:00
committed by cgzones
parent e9fa290019
commit ad3acfc847
4 changed files with 14 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
AvailableColumnsPanel.c
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@ -28,7 +28,6 @@ static void AvailableColumnsPanel_delete(Object* object) {
static HandlerResult AvailableColumnsPanel_eventHandler(Panel* super, int ch) {
AvailableColumnsPanel* this = (AvailableColumnsPanel*) super;
int key = ((ListItem*) Panel_getSelected(super))->key;
HandlerResult result = IGNORED;
switch(ch) {
@ -36,6 +35,11 @@ static HandlerResult AvailableColumnsPanel_eventHandler(Panel* super, int ch) {
case KEY_ENTER:
case KEY_F(5):
{
const ListItem* selected = (ListItem*) Panel_getSelected(super);
if (!selected)
break;
int key = selected->key;
int at = Panel_getSelectedIndex(this->columns);
Panel_insert(this->columns, at, (Object*) ListItem_new(Process_fields[key].name, key));
Panel_setSelected(this->columns, at+1);