134 lines
4.1 KiB
C
134 lines
4.1 KiB
C
/* $Xorg: GetProp.c,v 1.5 2001/02/09 02:03:33 xorgcvs Exp $ */
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/*
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Copyright 1986, 1998 The Open Group
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Permission to use, copy, modify, distribute, and sell this software and its
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documentation for any purpose is hereby granted without fee, provided that
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the above copyright notice appear in all copies and that both that
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copyright notice and this permission notice appear in supporting
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documentation.
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The above copyright notice and this permission notice shall be included in
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all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
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AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Except as contained in this notice, the name of The Open Group shall not be
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used in advertising or otherwise to promote the sale, use or other dealings
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in this Software without prior written authorization from The Open Group.
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*/
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/* $XFree86: xc/lib/X11/GetProp.c,v 1.6 2001/12/14 19:54:01 dawes Exp $ */
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#define NEED_REPLIES
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#include "Xlibint.h"
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int
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XGetWindowProperty(dpy, w, property, offset, length, delete,
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req_type, actual_type, actual_format, nitems, bytesafter, prop)
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register Display *dpy;
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Window w;
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Atom property;
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Bool delete;
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Atom req_type;
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Atom *actual_type; /* RETURN */
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int *actual_format; /* RETURN 8, 16, or 32 */
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long offset, length;
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unsigned long *nitems; /* RETURN # of 8-, 16-, or 32-bit entities */
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unsigned long *bytesafter; /* RETURN */
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unsigned char **prop; /* RETURN */
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{
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xGetPropertyReply reply;
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register xGetPropertyReq *req;
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xError error;
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LockDisplay(dpy);
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GetReq (GetProperty, req);
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req->window = w;
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req->property = property;
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req->type = req_type;
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req->delete = delete;
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req->longOffset = offset;
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req->longLength = length;
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error.sequenceNumber = dpy->request;
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if (!_XReply (dpy, (xReply *) &reply, 0, xFalse)) {
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UnlockDisplay(dpy);
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SyncHandle();
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return (1); /* not Success */
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}
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*prop = (unsigned char *) NULL;
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if (reply.propertyType != None) {
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long nbytes, netbytes;
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switch (reply.format) {
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/*
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* One extra byte is malloced than is needed to contain the property
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* data, but this last byte is null terminated and convenient for
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* returning string properties, so the client doesn't then have to
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* recopy the string to make it null terminated.
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*/
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case 8:
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nbytes = netbytes = reply.nItems;
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if (nbytes + 1 > 0 &&
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(*prop = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
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_XReadPad (dpy, (char *) *prop, netbytes);
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break;
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case 16:
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nbytes = reply.nItems * sizeof (short);
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netbytes = reply.nItems << 1;
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if (nbytes + 1 > 0 &&
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(*prop = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
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_XRead16Pad (dpy, (short *) *prop, netbytes);
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break;
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case 32:
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nbytes = reply.nItems * sizeof (long);
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netbytes = reply.nItems << 2;
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if (nbytes + 1 > 0 &&
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(*prop = (unsigned char *) Xmalloc ((unsigned)nbytes + 1)))
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_XRead32 (dpy, (long *) *prop, netbytes);
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break;
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default:
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/*
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* This part of the code should never be reached. If it is,
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* the server sent back a property with an invalid format.
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* This is a BadImplementation error.
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*/
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{
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/* sequence number stored above */
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error.type = X_Error;
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error.majorCode = X_GetProperty;
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error.minorCode = 0;
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error.errorCode = BadImplementation;
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_XError(dpy, &error);
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}
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nbytes = netbytes = 0L;
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break;
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}
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if (! *prop) {
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_XEatData(dpy, (unsigned long) netbytes);
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UnlockDisplay(dpy);
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SyncHandle();
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return(BadAlloc); /* not Success */
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}
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(*prop)[nbytes] = '\0';
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}
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*actual_type = reply.propertyType;
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*actual_format = reply.format;
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*nitems = reply.nItems;
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*bytesafter = reply.bytesAfter;
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UnlockDisplay(dpy);
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SyncHandle();
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return(Success);
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}
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