/* $XConsortium: XChProp.c,v 11.22 91/01/06 11:44:22 rws Exp $ */ /* Copyright Massachusetts Institute of Technology 1986 */ /* 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, and that the name of M.I.T. not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. M.I.T. makes no representations about the suitability of this software for any purpose. It is provided "as is" without express or implied warranty. */ #include "Xlibint.h" #if NeedFunctionPrototypes XChangeProperty ( register Display *dpy, Window w, Atom property, Atom type, int format, /* 8, 16, or 32 */ int mode, /* PropModeReplace, PropModePrepend, PropModeAppend */ _Xconst unsigned char *data, int nelements) #else XChangeProperty (dpy, w, property, type, format, mode, data, nelements) register Display *dpy; Window w; Atom property, type; int format; /* 8, 16, or 32 */ int mode; /* PropModeReplace, PropModePrepend, PropModeAppend */ unsigned char *data; int nelements; #endif { register xChangePropertyReq *req; register long len; LockDisplay(dpy); GetReq (ChangeProperty, req); req->window = w; req->property = property; req->type = type; req->format = format; req->mode = mode; if (nelements < 0) { req->nUnits = 0; req->format = 0; /* ask for garbage, get garbage */ } else req->nUnits = nelements; switch (format) { case 8: len = req->length + (((long)nelements + 3)>>2); if (len <= 65535) { req->length = len; Data (dpy, (char *)data, nelements); } /* else force BadLength */ break; case 16: len = req->length + (((long)nelements + 1)>>1); if (len <= 65535) { req->length = len; len = (long)nelements << 1; Data16 (dpy, (short *) data, len); } /* else force BadLength */ break; case 32: len = req->length + (long)nelements; if (len <= 65535) { req->length = len; len = (long)nelements << 2; Data32 (dpy, (long *) data, len); } /* else force BadLength */ break; default: /* BadValue will be generated */ ; } UnlockDisplay(dpy); SyncHandle(); }