GetPntMap.c revision b4ee4795 
1/*
2
3Copyright 1986, 1998  The Open Group
4
5Permission to use, copy, modify, distribute, and sell this software and its
6documentation for any purpose is hereby granted without fee, provided that
7the above copyright notice appear in all copies and that both that
8copyright notice and this permission notice appear in supporting
9documentation.
10
11The above copyright notice and this permission notice shall be included in
12all copies or substantial portions of the Software.
13
14THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
17OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
18AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
19CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
20
21Except as contained in this notice, the name of The Open Group shall not be
22used in advertising or otherwise to promote the sale, use or other dealings
23in this Software without prior written authorization from The Open Group.
24
25*/
26
27
28#define NEED_REPLIES
29#ifdef HAVE_CONFIG_H
30#include <config.h>
31#endif
32#include "Xlibint.h"
33
34#ifdef MIN		/* some systems define this in <sys/param.h> */
35#undef MIN
36#endif
37#define MIN(a, b) ((a) < (b) ? (a) : (b))
38
39int XGetPointerMapping (
40    register Display *dpy,
41    unsigned char *map,	/* RETURN */
42    int nmaps)
43
44{
45    unsigned char mapping[256];	/* known fixed size */
46    long nbytes, remainder = 0;
47    xGetPointerMappingReply rep;
48    register xReq *req;
49
50    LockDisplay(dpy);
51    GetEmptyReq(GetPointerMapping, req);
52    if (! _XReply(dpy, (xReply *)&rep, 0, xFalse)) {
53	UnlockDisplay(dpy);
54	SyncHandle();
55	return 0;
56    }
57
58    nbytes = (long)rep.length << 2;
59
60    /* Don't count on the server returning a valid value */
61    if (nbytes > sizeof mapping) {
62	remainder = nbytes - sizeof mapping;
63	nbytes = sizeof mapping;
64    }
65    _XRead (dpy, (char *)mapping, nbytes);
66    /* don't return more data than the user asked for. */
67    if (rep.nElts) {
68	    memcpy ((char *) map, (char *) mapping,
69		MIN((int)rep.nElts, nmaps) );
70	}
71
72    if (remainder)
73	_XEatData(dpy, (unsigned long)remainder);
74
75    UnlockDisplay(dpy);
76    SyncHandle();
77    return ((int) rep.nElts);
78}
79
80KeySym *
81XGetKeyboardMapping (Display *dpy,
82#if NeedWidePrototypes
83			     unsigned int first_keycode,
84#else
85			     KeyCode first_keycode,
86#endif
87			     int count,
88			     int *keysyms_per_keycode)
89{
90    long nbytes;
91    unsigned long nkeysyms;
92    register KeySym *mapping = NULL;
93    xGetKeyboardMappingReply rep;
94    register xGetKeyboardMappingReq *req;
95
96    LockDisplay(dpy);
97    GetReq(GetKeyboardMapping, req);
98    req->firstKeyCode = first_keycode;
99    req->count = count;
100    if (! _XReply(dpy, (xReply *)&rep, 0, xFalse)) {
101	UnlockDisplay(dpy);
102	SyncHandle();
103	return (KeySym *) NULL;
104    }
105
106    nkeysyms = (unsigned long) rep.length;
107    if (nkeysyms > 0) {
108	nbytes = nkeysyms * sizeof (KeySym);
109	mapping = (KeySym *) Xmalloc ((unsigned) nbytes);
110	nbytes = nkeysyms << 2;
111	if (! mapping) {
112	    _XEatData(dpy, (unsigned long) nbytes);
113	    UnlockDisplay(dpy);
114	    SyncHandle();
115	    return (KeySym *) NULL;
116	}
117	_XRead32 (dpy, (long *) mapping, nbytes);
118    }
119    *keysyms_per_keycode = rep.keySymsPerKeyCode;
120    UnlockDisplay(dpy);
121    SyncHandle();
122    return (mapping);
123}
124
125