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      1 /*
      2 
      3 Copyright 1986, 1998  The Open Group
      4 
      5 Permission to use, copy, modify, distribute, and sell this software and its
      6 documentation for any purpose is hereby granted without fee, provided that
      7 the above copyright notice appear in all copies and that both that
      8 copyright notice and this permission notice appear in supporting
      9 documentation.
     10 
     11 The above copyright notice and this permission notice shall be included in
     12 all copies or substantial portions of the Software.
     13 
     14 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     15 IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     16 FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
     17 OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
     18 AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
     19 CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
     20 
     21 Except as contained in this notice, the name of The Open Group shall not be
     22 used in advertising or otherwise to promote the sale, use or other dealings
     23 in this Software without prior written authorization from The Open Group.
     24 
     25 */
     26 
     27 #ifdef HAVE_CONFIG_H
     28 #include <config.h>
     29 #endif
     30 #include <X11/Xlibint.h>
     31 #include <X11/Xatom.h>
     32 
     33 /* insulate predefined atom numbers from cut routines */
     34 static const Atom n_to_atom[8] = {
     35 	XA_CUT_BUFFER0,
     36 	XA_CUT_BUFFER1,
     37 	XA_CUT_BUFFER2,
     38 	XA_CUT_BUFFER3,
     39 	XA_CUT_BUFFER4,
     40 	XA_CUT_BUFFER5,
     41 	XA_CUT_BUFFER6,
     42 	XA_CUT_BUFFER7};
     43 
     44 int
     45 XRotateBuffers (
     46     register Display *dpy,
     47     int rotate)
     48 {
     49     /* XRotateWindowProperties wants a non-const Atom*, but it doesn't
     50      * modify it, so this is safe.
     51      */
     52     return XRotateWindowProperties(dpy, RootWindow(dpy, 0), (Atom *)n_to_atom, 8, rotate);
     53 }
     54 
     55 char *XFetchBuffer (
     56     register Display *dpy,
     57     int *nbytes,
     58     register int buffer)
     59 {
     60     Atom actual_type;
     61     int actual_format;
     62     unsigned long nitems;
     63     unsigned long leftover;
     64     unsigned char *data;
     65     *nbytes = 0;
     66     if ((buffer < 0) || (buffer > 7)) return (NULL);
     67 /* XXX should be (sizeof (maxint) - 1)/4 */
     68     if (XGetWindowProperty(dpy, RootWindow(dpy, 0), n_to_atom[buffer],
     69 	0L, 10000000L, False, XA_STRING,
     70 	&actual_type, &actual_format, &nitems, &leftover, &data) != Success) {
     71 	return (NULL);
     72 	}
     73     if ( (actual_type == XA_STRING) &&  (actual_format != 32) ) {
     74 	*nbytes = nitems;
     75 	return((char *)data);
     76 	}
     77     Xfree (data);
     78     return(NULL);
     79 }
     80 
     81 char *XFetchBytes (
     82     register Display *dpy,
     83     int *nbytes)
     84 {
     85     return (XFetchBuffer (dpy, nbytes, 0));
     86 }
     87 
     88 int
     89 XStoreBuffer (
     90     register Display *dpy,
     91     _Xconst char *bytes,
     92     int nbytes,
     93     register int buffer)
     94 {
     95     if ((buffer < 0) || (buffer > 7)) return 0;
     96     return XChangeProperty(dpy, RootWindow(dpy, 0), n_to_atom[buffer],
     97 	XA_STRING, 8, PropModeReplace, (_Xconst unsigned char *) bytes, nbytes);
     98 }
     99 
    100 int
    101 XStoreBytes (
    102     register Display *dpy,
    103     _Xconst char *bytes,
    104     int nbytes)
    105 {
    106     return XStoreBuffer (dpy, bytes, nbytes, 0);
    107 }
    108