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Add better handling if selected_drive is NULL

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(Discovered from static analysis)
This commit is contained in:
Peter Evans 2018-02-06 14:58:00 -06:00
parent 0dce7dbc58
commit fa5bfe09ae
1 changed files with 9 additions and 3 deletions
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12
src/apple2.dd.c
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@ -419,7 +419,9 @@ apple2_dd_switch_drive(apple2 *mach, size_t addr)
break;
case 0x9:
apple2_dd_turn_on(mach->selected_drive, true);
if (mach->selected_drive) {
apple2_dd_turn_on(mach->selected_drive, true);
}
break;
case 0xA:
@ -431,11 +433,15 @@ apple2_dd_switch_drive(apple2 *mach, size_t addr)
break;
case 0xE:
mach->selected_drive->mode = DD_READ;
if (mach->selected_drive) {
mach->selected_drive->mode = DD_READ;
}
break;
case 0xF:
mach->selected_drive->mode = DD_WRITE;
if (mach->selected_drive) {
mach->selected_drive->mode = DD_WRITE;
}
break;
}
}