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dix: shift the duplicate button mapping check to ProcSetPointerMapping.

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XI 2 allows two buttons to have the same button code.
This commit is contained in:
Peter Hutterer 2008-07-21 17:05:04 +09:30
parent 0dbfe0ebc6
commit 69de40ee45
1 changed files with 19 additions and 9 deletions
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28
dix/devices.c
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@ -1584,13 +1584,15 @@ SendMappingNotify(DeviceIntPtr pDev, unsigned request, unsigned firstKeyCode,
}
/*
* n-squared algorithm. n < 255 and don't want to copy the whole thing and
* sort it to do the checking. How often is it called? Just being lazy?
* Check if the given buffer contains elements between low (inclusive) and
* high (inclusive) only.
*
* @return TRUE if the device map is invalid, FALSE otherwise.
*/
Bool
BadDeviceMap(BYTE *buff, int length, unsigned low, unsigned high, XID *errval)
{
int i, j;
int i;
for (i = 0; i < length; i++)
if (buff[i]) /* only check non-zero elements */
@ -1600,12 +1602,6 @@ BadDeviceMap(BYTE *buff, int length, unsigned low, unsigned high, XID *errval)
*errval = buff[i];
return TRUE;
}
for (j = i + 1; j < length; j++)
if (buff[i] == buff[j])
{
*errval = buff[i];
return TRUE;
}
}
return FALSE;
}
@ -1861,6 +1857,7 @@ ProcSetPointerMapping(ClientPtr client)
{
BYTE *map;
int ret;
int i, j;
DeviceIntPtr ptr = PickPointer(client);
xSetPointerMappingReply rep;
REQUEST(xSetPointerMappingReq);
@ -1887,6 +1884,19 @@ ProcSetPointerMapping(ClientPtr client)
if (BadDeviceMap(&map[0], (int)stuff->nElts, 1, 255, &client->errorValue))
return BadValue;
/* core protocol specs don't allow for duplicate mappings. */
for (i = 0; i < stuff->nElts; i++)
{
for (j = i + 1; j < stuff->nElts; j++)
{
if (map[i] && map[i] == map[j])
{
client->errorValue = map[i];
return BadValue;
}
}
}
ret = DoSetPointerMapping(client, ptr, map, stuff->nElts);
if (ret != Success) {
rep.success = ret;