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xfree86: factor out adding/removing a device from the input device array

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No functional changes, just readability improvements. This also gets rid of
the count variable. Count was just used for resizing the null-terminated
list. Since we're not in a time-critical path here at all we can afford to
loop the list multiple times instead of keeping an extra variable around.

Signed-off-by: Peter Hutterer <peter.hutterer@who-t.net>
Reviewed-by: Daniel Stone <daniel@fooishbar.org>
This commit is contained in:
Peter Hutterer 2011-07-04 15:02:20 +10:00
parent 5b5477c05f
commit fa8f465281
1 changed files with 47 additions and 46 deletions
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93
hw/xfree86/common/xf86Config.c
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@ -1068,6 +1068,46 @@ Bool xf86DRI2Enabled(void)
return xf86Info.dri2;
}
/**
* Search for the pInfo in the null-terminated list given and remove (and
* free) it if present. All other devices are moved forward.
*/
static void
freeDevice(InputInfoPtr *list, InputInfoPtr pInfo)
{
InputInfoPtr *devs;
for (devs = list; devs && *devs; devs++) {
if (*devs == pInfo) {
free(*devs);
for (; devs && *devs; devs++)
devs[0] = devs[1];
break;
}
}
}
/**
* Append pInfo to the null-terminated list, allocating space as necessary.
* pInfo is copied into the last element.
*/
static InputInfoPtr*
addDevice(InputInfoPtr *list, InputInfoPtr pInfo)
{
InputInfoPtr *devs;
int count = 1;
for (devs = list; devs && *devs; devs++)
count++;
list = xnfrealloc(list, (count + 1) * sizeof(InputInfoPtr));
list[count] = NULL;
list[count - 1] = xnfalloc(sizeof(InputInfoRec));
*list[count - 1] = *pInfo;
return list;
}
/*
* Locate the core input devices. These can be specified/located in
* the following ways, in order of priority:
@ -1094,7 +1134,6 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
InputInfoRec Pointer = {}, Keyboard = {};
XF86ConfInputPtr confInput;
XF86ConfInputRec defPtr, defKbd;
int count = 0;
MessageType from = X_DEFAULT;
int found = 0;
const char *mousedrivers[] = { "mouse", "synaptics", "evdev", "vmmouse",
@ -1119,7 +1158,6 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
coreKeyboard = indp;
}
}
count++;
}
confInput = NULL;
@ -1139,17 +1177,9 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
* removed.
*/
if (corePointer) {
for (devs = servlayoutp->inputs; devs && *devs; devs++) {
if (*devs == corePointer) {
free(*devs);
for (; devs && *devs; devs++)
devs[0] = devs[1];
break;
}
}
count--;
freeDevice(servlayoutp->inputs, corePointer);
corePointer = NULL;
}
corePointer = NULL;
foundPointer = TRUE;
}
@ -1210,14 +1240,7 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
Pointer.options = xf86addNewOption(Pointer.options,
xnfstrdup("CorePointer"), "on");
Pointer.fd = -1;
count++;
devs = xnfrealloc(servlayoutp->inputs,
(count + 1) * sizeof(InputInfoPtr));
devs[count - 1] = xnfalloc(sizeof(InputInfoRec));
devs[count] = NULL;
*devs[count - 1] = Pointer;
servlayoutp->inputs = devs;
servlayoutp->inputs = addDevice(servlayoutp->inputs, &Pointer);
}
}
@ -1256,14 +1279,7 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
Pointer.options = xf86addNewOption(NULL,
xnfstrdup("AlwaysCore"), "on");
Pointer.fd = -1;
count++;
devs = xnfrealloc(servlayoutp->inputs,
(count + 1) * sizeof(InputInfoPtr));
devs[count - 1] = xnfalloc(sizeof(InputInfoRec));
devs[count] = NULL;
*devs[count - 1] = Pointer;
servlayoutp->inputs = devs;
servlayoutp->inputs = addDevice(servlayoutp->inputs, &Pointer);
}
}
@ -1284,17 +1300,9 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
* removed.
*/
if (coreKeyboard) {
for (devs = servlayoutp->inputs; devs && *devs; devs++) {
if (*devs == coreKeyboard) {
free(*devs);
for (; devs && *devs; devs++)
devs[0] = devs[1];
break;
}
}
count--;
freeDevice(servlayoutp->inputs, coreKeyboard);
coreKeyboard = NULL;
}
coreKeyboard = NULL;
foundKeyboard = TRUE;
}
@ -1353,14 +1361,7 @@ checkCoreInputDevices(serverLayoutPtr servlayoutp, Bool implicitLayout)
Keyboard.options = xf86addNewOption(Keyboard.options,
xnfstrdup("CoreKeyboard"), "on");
Keyboard.fd = -1;
count++;
devs = xnfrealloc(servlayoutp->inputs,
(count + 1) * sizeof(InputInfoPtr));
devs[count - 1] = xnfalloc(sizeof(InputInfoRec));
devs[count] = NULL;
*devs[count - 1] = Keyboard;
servlayoutp->inputs = devs;
servlayoutp->inputs = addDevice(servlayoutp->inputs, &Keyboard);
}
}