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/* $Xorg: XpGetData.c,v 1.4 2000/08/17 19:46:07 cpqbld Exp $ */
/******************************************************************************
******************************************************************************
**
** (c) Copyright 1996 Hewlett-Packard Company
** (c) Copyright 1996 International Business Machines Corp.
** (c) Copyright 1996 Sun Microsystems, Inc.
** (c) Copyright 1996 Novell, Inc.
** (c) Copyright 1996 Digital Equipment Corp.
** (c) Copyright 1996 Fujitsu Limited
** (c) Copyright 1996 Hitachi, Ltd.
**
** Permission is hereby granted, free of charge, to any person obtaining a copy
** of this software and associated documentation files (the "Software"), to deal
** in the Software without restriction, including without limitation the rights
** to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
** copies of the Software, and to permit persons to whom the Software is
** furnished to do so, subject to the following conditions:
**
** The above copyright notice and this permission notice shall be included in
** all copies or substantial portions of the Software.
**
** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
** IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
** FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
** COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
** IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
** CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
**
** Except as contained in this notice, the names of the copyright holders shall
** not be used in advertising or otherwise to promote the sale, use or other
** dealings in this Software without prior written authorization from said
** copyright holders.
**
******************************************************************************
*****************************************************************************/
/* $XFree86: xc/lib/Xp/XpGetData.c,v 1.5 2002/10/16 00:37:32 dawes Exp $ */
#define NEED_REPLIES
#include <X11/extensions/Printstr.h>
#include <X11/Xlibint.h>
#include "XpExtUtil.h"
#define MAX_XP_BUFFER_SIZE 32768
/*
* At the tail of every async struct of ours is attached the
* following "dev private" information needed by our async handler.
*/
typedef struct {
XPContext context;
XPSaveProc save_proc;
XPFinishProc finish_proc;
XPointer client_data;
_XAsyncHandler *async;
unsigned long seq; /* sequence # that will trigger handler */
} _XpState;
/*
* The following is the handler for async replies from
* XpGetDocumentData().
*/
static Bool
_XpGetDocDataHandler(dpy, rep, buf, len, adata)
register Display *dpy;
register xReply *rep;
char *buf;
int len;
XPointer adata;
{
register _XpState *state;
xPrintGetDocumentDataReply replbuf;
xPrintGetDocumentDataReply *repl;
int dataLen;
char *data;
state = (_XpState *)adata;
/*
* Bypass this handler if the reply is NOT the one we're looking for.
*/
if (dpy->last_request_read != state->seq) {
return False;
}
/*
* When an error occurs, call the finish_proc and then de-queue
* this event handler. Once an error occurs, all bets are off.
* The error XPGetDocError is *not* the most descriptive, so the
* caller will be encouraged to dig around for the corresponding
* generated error.
*
* Note - Do not confuse the "generated" errors here with
* XPGetDocSecondConsumer which is returned in a protocol reply.
*/
if (rep->generic.type == X_Error) {
(*state->finish_proc)( (Display *) dpy,
(XPContext) state->context,
XPGetDocError,
(XPointer) state->client_data );
DeqAsyncHandler(dpy, state->async);
Xfree(state->async);
return False;
}
repl = (xPrintGetDocumentDataReply *)
_XGetAsyncReply(dpy, (char *)&replbuf, rep, buf, len, 0, False);
if (repl->dataLen) {
/*
* Call save_proc in cases where there was document data
*/
dataLen = repl->length << 2; /*with pad len*/
data = (char *) _XAllocTemp( dpy, dataLen );
_XGetAsyncData( dpy, (char *) data, buf, len,
SIZEOF(xPrintGetDocumentDataReply), dataLen, 0);
(*state->save_proc)( (Display *) dpy,
(XPContext) state->context,
(unsigned char *) data,
(unsigned int) repl->dataLen, /* actual len */
(XPointer) state->client_data );
_XFreeTemp( dpy, (char *) data, dataLen );
}
if (repl->finishedFlag) {
/*
* Call finish_proc
*/
(*state->finish_proc)( (Display *) dpy,
(XPContext) state->context,
(XPGetDocStatus) repl->statusCode,
(XPointer) state->client_data );
/*
* De-queue this async handler - we're done.
*/
DeqAsyncHandler( dpy, state->async );
Xfree(state->async);
}
return True; /* the reply WAS consumed by this handler */
}
/******************************************************************************
*
* XpGetDocumentData()
*
* ...registers callbacks to be triggered when async protocol replies
* come back in response to the origial request.
*
* Returned Status indicate whether the callbacks will be used
* (finish_proc and possibly save_proc), or whether they will
* never be used.
*
*/
Status
XpGetDocumentData (
Display *dpy,
XPContext context,
XPSaveProc save_proc,
XPFinishProc finish_proc,
XPointer client_data
)
{
xPrintGetDocumentDataReq *req;
XExtDisplayInfo *info = (XExtDisplayInfo *) xp_find_display (dpy);
_XAsyncHandler *async;
_XpState *async_state;
if (XpCheckExtInit(dpy, XP_DONT_CHECK) == -1)
return(0); /* No such extension */
async = (_XAsyncHandler *)Xmalloc(sizeof(_XAsyncHandler) +
sizeof(_XpState));
if (!async)
return(0); /* malloc error */
async_state = (_XpState *)(async + 1);
LockDisplay (dpy);
GetReq(PrintGetDocumentData,req);
req->reqType = info->codes->major_opcode;
req->printReqType = X_PrintGetDocumentData;
req->printContext = context;
req->maxBufferSize = MAX_XP_BUFFER_SIZE; /* use as a hint to X server */
async_state->context = context;
async_state->save_proc = save_proc;
async_state->finish_proc = finish_proc;
async_state->client_data = client_data;
async_state->seq = dpy->request;
async_state->async = async;
async->next = dpy->async_handlers;
async->handler = _XpGetDocDataHandler;
async->data = (XPointer)async_state;
dpy->async_handlers = async;
UnlockDisplay(dpy);
SyncHandle();
return(1); /* success at registering a handler */
}
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