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xkb: split XkbSendCompatMap() 

This function is a funny beast: it assembles and writes out an xkbGetCompatMapReply,
called in two different cases, ProcXkbGetCompatMap() as well as ProcXkbGetKbdByName().
In the latter case the whole reply is contained in another one. That's the reason
why it's payload size is computed separately - the caller must know that in order
to set up the container's reply size correctly.

As preparation for upcoming simplifications of the reply send path, splitting off
this function into pieces: XkbAssembleCompatMap() just assembles the reply payload,
while it's callers now responsible for preparing the request header and writing
out both pieces.

Signed-off-by: Enrico Weigelt, metux IT consult <info@metux.net>
This commit is contained in:
Enrico Weigelt, metux IT consult 2024-07-25 16:28:48 +02:00
parent 182404fde6
commit d90335b8f1
1 changed files with 47 additions and 25 deletions
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72
xkb/xkb.c
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@ -2798,16 +2798,13 @@ XkbComputeGetCompatMapReplySize(XkbCompatMapPtr compat,
return Success;
}
static int
XkbSendCompatMap(ClientPtr client,
XkbCompatMapPtr compat, xkbGetCompatMapReply rep)
static void
XkbAssembleCompatMap(ClientPtr client,
XkbCompatMapPtr compat,
xkbGetCompatMapReply rep,
char *buf)
{
int sz = rep.length * sizeof(CARD32);
char *buf = calloc(1, sz);
if (sz && (!buf))
return BadAlloc;
if (sz) {
if (rep.length) {
register unsigned i, bit;
xkbModsWireDesc *grp;
XkbSymInterpretPtr sym = &compat->sym_interpret[rep.firstSI];
@ -2841,19 +2838,6 @@ XkbSendCompatMap(ClientPtr client,
wire = (xkbSymInterpretWireDesc *) grp;
}
}
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swaps(&rep.firstSI);
swaps(&rep.nSI);
swaps(&rep.nTotalSI);
}
WriteToClient(client, sizeof(xkbGetCompatMapReply), &rep);
WriteToClient(client, sz, buf);
free(buf);
return Success;
}
int
@ -2893,7 +2877,26 @@ ProcXkbGetCompatMap(ClientPtr client)
return BadValue;
}
XkbComputeGetCompatMapReplySize(compat, &rep);
return XkbSendCompatMap(client, compat, rep);
int sz = rep.length * sizeof(CARD32);
char *buf = calloc(1, sz);
if (rep.length && (!buf)) // rep.length = 0 is valid here
return BadAlloc;
XkbAssembleCompatMap(client, compat, rep, buf);
if (client->swapped) {
swaps(&rep.sequenceNumber);
swapl(&rep.length);
swaps(&rep.firstSI);
swaps(&rep.nSI);
swaps(&rep.nTotalSI);
}
WriteToClient(client, sizeof(xkbGetCompatMapReply), &rep);
WriteToClient(client, sz, buf);
free(buf);
return Success;
}
/**
@ -6065,8 +6068,27 @@ ProcXkbGetKbdByName(ClientPtr client)
free(buf);
}
if (reported & XkbGBN_CompatMapMask)
XkbSendCompatMap(client, new->compat, crep);
if (reported & XkbGBN_CompatMapMask) {
int sz = crep.length * sizeof(CARD32);
char *buf = calloc(1, sz);
if (!buf)
return BadAlloc;
XkbAssembleCompatMap(client, new->compat, crep, buf);
if (client->swapped) {
swaps(&crep.sequenceNumber);
swapl(&crep.length);
swaps(&crep.firstSI);
swaps(&crep.nSI);
swaps(&crep.nTotalSI);
}
WriteToClient(client, sizeof(crep), &crep);
WriteToClient(client, sz, buf);
free(buf);
}
if (reported & XkbGBN_IndicatorMapMask)
XkbSendIndicatorMap(client, new->indicators, irep);
if (reported & (XkbGBN_KeyNamesMask | XkbGBN_OtherNamesMask))