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xkb: XkbSendIndicatorMap(): little simplification 

A bit simplification in code flow.
The extra length check (did we write as much as intended?) isn't necessary,
since the buffer size is computed by the very same data before this
function is called.

Hint: the size computation must be done before calling this one, because
the reply might be encapsulated in another one (xkbGetKbdByName).

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2024-07-16 11:04:24 +02:00
parent 800025954e
commit cf739f7fd5
1 changed files with 24 additions and 38 deletions
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62
xkb/xkb.c
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@ -3175,49 +3175,37 @@ static int
XkbSendIndicatorMap(ClientPtr client,
XkbIndicatorPtr indicators, xkbGetIndicatorMapReply rep)
{
int length;
CARD8 *map;
int length = rep.length * 4;
CARD8 *map = calloc(1, length);
if (!map)
return BadAlloc;
register int i;
register unsigned bit;
if (rep.length > 0) {
CARD8 *to;
xkbIndicatorMapWireDesc *wire = (xkbIndicatorMapWireDesc *) map;
to = map = calloc(rep.length, 4);
if (map) {
xkbIndicatorMapWireDesc *wire = (xkbIndicatorMapWireDesc *) to;
length = rep.length * 4;
for (i = 0, bit = 1; i < XkbNumIndicators; i++, bit <<= 1) {
if (rep.which & bit) {
wire->flags = indicators->maps[i].flags;
wire->whichGroups = indicators->maps[i].which_groups;
wire->groups = indicators->maps[i].groups;
wire->whichMods = indicators->maps[i].which_mods;
wire->mods = indicators->maps[i].mods.mask;
wire->realMods = indicators->maps[i].mods.real_mods;
wire->virtualMods = indicators->maps[i].mods.vmods;
wire->ctrls = indicators->maps[i].ctrls;
if (client->swapped) {
swaps(&wire->virtualMods);
swapl(&wire->ctrls);
}
wire++;
for (i = 0, bit = 1; i < XkbNumIndicators; i++, bit <<= 1) {
if (rep.which & bit) {
wire->flags = indicators->maps[i].flags;
wire->whichGroups = indicators->maps[i].which_groups;
wire->groups = indicators->maps[i].groups;
wire->whichMods = indicators->maps[i].which_mods;
wire->mods = indicators->maps[i].mods.mask;
wire->realMods = indicators->maps[i].mods.real_mods;
wire->virtualMods = indicators->maps[i].mods.vmods;
wire->ctrls = indicators->maps[i].ctrls;
if (client->swapped) {
swaps(&wire->virtualMods);
swapl(&wire->ctrls);
}
}
to = (CARD8 *) wire;
if ((to - map) != length) {
client->errorValue = _XkbErrCode2(0xff, length);
free(map);
return BadLength;
wire++;
}
}
else
return BadAlloc;
}
else
map = NULL;
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
@ -3225,10 +3213,8 @@ XkbSendIndicatorMap(ClientPtr client,
swapl(&rep.realIndicators);
}
WriteToClient(client, sizeof(xkbGetIndicatorMapReply), &rep);
if (map) {
WriteToClient(client, length, map);
free((char *) map);
}
WriteToClient(client, length, map);
free(map);
return Success;
}