/* $Xorg: XlibAsync.c,v 1.4 2001/02/09 02:03:38 xorgcvs Exp $ */ /* Copyright 1992, 1998 The Open Group Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted without fee, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation. 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 OPEN GROUP 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 name of The Open Group shall not be used in advertising or otherwise to promote the sale, use or other dealings in this Software without prior written authorization from The Open Group. */ /**************************************************************************/ /* */ /* Copyright (c) 2001, 2011 NoMachine, http://www.nomachine.com/. */ /* */ /* NX-X11, NX protocol compression and NX extensions to this software */ /* are copyright of NoMachine. Redistribution and use of the present */ /* software is allowed according to terms specified in the file LICENSE */ /* which comes in the source distribution. */ /* */ /* Check http://www.nomachine.com/licensing.html for applicability. */ /* */ /* NX and NoMachine are trademarks of Medialogic S.p.A. */ /* */ /* All rights reserved. */ /* */ /**************************************************************************/ #define NEED_REPLIES #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <X11/Xlibint.h> #include <X11/Xos.h> /*ARGSUSED*/ Bool _XAsyncErrorHandler(dpy, rep, buf, len, data) register Display *dpy; register xReply *rep; char *buf; int len; XPointer data; { register _XAsyncErrorState *state; state = (_XAsyncErrorState *)data; if (rep->generic.type == X_Error && (!state->error_code || rep->error.errorCode == state->error_code) && (!state->major_opcode || rep->error.majorCode == state->major_opcode) && (!state->minor_opcode || rep->error.minorCode == state->minor_opcode) && (!state->min_sequence_number || (state->min_sequence_number <= dpy->last_request_read)) && (!state->max_sequence_number || (state->max_sequence_number >= dpy->last_request_read))) { state->last_error_received = rep->error.errorCode; state->error_count++; return True; } return False; } void _XDeqAsyncHandler(dpy, handler) Display *dpy; register _XAsyncHandler *handler; { register _XAsyncHandler **prev; register _XAsyncHandler *async; for (prev = &dpy->async_handlers; (async = *prev) && (async != handler); prev = &async->next) ; if (async) *prev = async->next; } char * _XGetAsyncReply(dpy, replbuf, rep, buf, len, extra, discard) register Display *dpy; register char *replbuf; /* data is read into this buffer */ register xReply *rep; /* value passed to calling handler */ char *buf; /* value passed to calling handler */ int len; /* value passed to calling handler */ int extra; /* extra words to read, ala _XReply */ Bool discard; /* discard after extra?, ala _XReply */ { if (extra == 0) { if (discard && (rep->generic.length << 2) > len) _XEatData (dpy, (rep->generic.length << 2) - len); return (char *)rep; } if (extra <= rep->generic.length) { int size = SIZEOF(xReply) + (extra << 2); if (size > len) { memcpy(replbuf, buf, len); _XRead(dpy, replbuf + len, size - len); buf = replbuf; len = size; #ifdef MUSTCOPY } else { memcpy(replbuf, buf, size); buf = replbuf; #endif } if (discard && rep->generic.length > extra && (rep->generic.length << 2) > len) _XEatData (dpy, (rep->generic.length << 2) - len); return buf; } /* *if we get here, then extra > rep->generic.length--meaning we * read a reply that's shorter than we expected. This is an * error, but we still need to figure out how to handle it... */ if ((rep->generic.length << 2) > len) _XEatData (dpy, (rep->generic.length << 2) - len); #ifdef NX_TRANS_SOCKET /* * The original code has provision * for returning already. */ #endif _XIOError (dpy); return (char *)rep; } void _XGetAsyncData(dpy, data, buf, len, skip, datalen, discardtotal) Display *dpy; char *data; /* data is read into this buffer */ char *buf; /* value passed to calling handler */ int len; /* value passed to calling handler */ int skip; /* number of bytes already read in previous _XGetAsyncReply or _XGetAsyncData calls */ int datalen; /* size of data buffer in bytes */ int discardtotal; /* min. bytes to consume (after skip) */ { buf += skip; len -= skip; if (!data) { if (datalen > len) _XEatData(dpy, datalen - len); } else if (datalen <= len) { memcpy(data, buf, datalen); } else { memcpy(data, buf, len); _XRead(dpy, data + len, datalen - len); } if (discardtotal > len) { if (datalen > len) len = datalen; _XEatData(dpy, discardtotal - len); } }