2 * Copyright © 2009 Red Hat, Inc.
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5 * copy of this software and associated documentation files (the "Software"),
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8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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21 * DEALINGS IN THE SOFTWARE.
30 #include <X11/Xlibint.h>
31 #include <X11/extensions/XI2proto.h>
32 #include <X11/extensions/XInput2.h>
33 #include <X11/extensions/extutil.h>
36 extern int copy_classes(XIDeviceInfo* to, xXIAnyInfo* from, int *nclasses);
37 extern int size_classes(xXIAnyInfo* from, int nclasses);
40 XIQueryDevice(Display *dpy, int deviceid, int *ndevices_return)
42 XIDeviceInfo *info = NULL;
43 xXIQueryDeviceReq *req;
44 xXIQueryDeviceReply reply;
49 XExtDisplayInfo *extinfo = XInput_find_display(dpy);
52 if (_XiCheckExtInit(dpy, XInput_2_0, extinfo) == -1)
55 GetReq(XIQueryDevice, req);
56 req->reqType = extinfo->codes->major_opcode;
57 req->ReqType = X_XIQueryDevice;
58 req->deviceid = deviceid;
60 if (!_XReply(dpy, (xReply*) &reply, 0, xFalse))
63 *ndevices_return = reply.num_devices;
64 info = Xmalloc((reply.num_devices + 1) * sizeof(XIDeviceInfo));
68 buf = Xmalloc(reply.length * 4);
69 _XRead(dpy, buf, reply.length * 4);
72 /* info is a null-terminated array */
73 info[reply.num_devices].name = NULL;
75 for (i = 0; i < reply.num_devices; i++)
79 XIDeviceInfo *lib = &info[i];
80 xXIDeviceInfo *wire = (xXIDeviceInfo*)ptr;
82 lib->deviceid = wire->deviceid;
84 lib->attachment = wire->attachment;
85 lib->enabled = wire->enabled;
86 nclasses = wire->num_classes;
88 ptr += sizeof(xXIDeviceInfo);
90 lib->name = Xcalloc(wire->name_len + 1, 1);
91 strncpy(lib->name, ptr, wire->name_len);
92 ptr += ((wire->name_len + 3)/4) * 4;
94 sz = size_classes((xXIAnyInfo*)ptr, nclasses);
95 lib->classes = Xmalloc(sz);
96 ptr += copy_classes(lib, (xXIAnyInfo*)ptr, &nclasses);
97 /* We skip over unused classes */
98 lib->num_classes = nclasses;
109 *ndevices_return = -1;
114 XIFreeDeviceInfo(XIDeviceInfo* info)
116 XIDeviceInfo *ptr = info;