1 /************************************************************ 2 3 Copyright 1989, 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 Copyright 1989 by Hewlett-Packard Company, Palo Alto, California. 26 27 All Rights Reserved 28 29 Permission to use, copy, modify, and distribute this software and its 30 documentation for any purpose and without fee is hereby granted, 31 provided that the above copyright notice appear in all copies and that 32 both that copyright notice and this permission notice appear in 33 supporting documentation, and that the name of Hewlett-Packard not be 34 used in advertising or publicity pertaining to distribution of the 35 software without specific, written prior permission. 36 37 HEWLETT-PACKARD DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING 38 ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL 39 HEWLETT-PACKARD BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR 40 ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, 41 WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, 42 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS 43 SOFTWARE. 44 45 ********************************************************/ 46 47 /*********************************************************************** 48 * 49 * XQueryDeviceState - Query the state of an extension input device. 50 * 51 */ 52 #ifdef HAVE_CONFIG_H 53 #include <config.h> 54 #endif 55 56 #include <X11/extensions/XI.h> 57 #include <X11/extensions/XIproto.h> 58 #include <X11/Xlibint.h> 59 #include <X11/extensions/XInput.h> 60 #include <X11/extensions/extutil.h> 61 #include "XIint.h" 62 #include <limits.h> 63 64 XDeviceState * 65 XQueryDeviceState( 66 register Display *dpy, 67 XDevice *dev) 68 { 69 int i, j; 70 unsigned long rlen; 71 size_t size = 0; 72 xQueryDeviceStateReq *req; 73 xQueryDeviceStateReply rep; 74 XDeviceState *state = NULL; 75 XInputClass *any, *Any; 76 char *data = NULL, *end = NULL; 77 XExtDisplayInfo *info = XInput_find_display(dpy); 78 79 LockDisplay(dpy); 80 if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1) 81 return NULL; 82 83 GetReq(QueryDeviceState, req); 84 req->reqType = info->codes->major_opcode; 85 req->ReqType = X_QueryDeviceState; 86 req->deviceid = dev->device_id; 87 88 if (!_XReply(dpy, (xReply *) & rep, 0, xFalse)) 89 goto out; 90 91 if (rep.length > 0) { 92 if (rep.length < (INT_MAX >> 2)) { 93 rlen = (unsigned long) rep.length << 2; 94 data = Xmalloc(rlen); 95 end = data + rlen; 96 } 97 if (!data) { 98 _XEatDataWords(dpy, rep.length); 99 goto out; 100 } 101 _XRead(dpy, data, rlen); 102 103 for (i = 0, any = (XInputClass *) data; i < (int)rep.num_classes; i++) { 104 if ((char *)any + sizeof(XInputClass) > end || 105 any->length == 0 || any->length > rlen) 106 goto out; 107 rlen -= any->length; 108 109 switch (any->class) { 110 case KeyClass: 111 size += sizeof(XKeyState); 112 break; 113 case ButtonClass: 114 size += sizeof(XButtonState); 115 break; 116 case ValuatorClass: 117 { 118 xValuatorState *v = (xValuatorState *) any; 119 if ((char *)any + sizeof(xValuatorState) > end) 120 goto out; 121 size += (sizeof(XValuatorState) + 122 (v->num_valuators * sizeof(int))); 123 } 124 break; 125 } 126 any = (XInputClass *) ((char *)any + any->length); 127 } 128 state = (XDeviceState *) Xmalloc(size + sizeof(XDeviceState)); 129 if (!state) 130 goto out; 131 132 state->device_id = dev->device_id; 133 state->num_classes = rep.num_classes; 134 state->data = (XInputClass *) (state + 1); 135 136 Any = state->data; 137 for (i = 0, any = (XInputClass *) data; i < (int)rep.num_classes; i++) { 138 switch (any->class) { 139 case KeyClass: 140 { 141 xKeyState *k = (xKeyState *) any; 142 XKeyState *K = (XKeyState *) Any; 143 144 K->class = k->class; 145 K->length = sizeof(XKeyState); 146 K->num_keys = k->num_keys; 147 memcpy((char *)&K->keys[0], (char *)&k->keys[0], 32); 148 Any = (XInputClass *) (K + 1); 149 } 150 break; 151 case ButtonClass: 152 { 153 xButtonState *b = (xButtonState *) any; 154 XButtonState *B = (XButtonState *) Any; 155 156 B->class = b->class; 157 B->length = sizeof(XButtonState); 158 B->num_buttons = b->num_buttons; 159 memcpy((char *)&B->buttons[0], (char *)&b->buttons[0], 32); 160 Any = (XInputClass *) (B + 1); 161 } 162 break; 163 case ValuatorClass: 164 { 165 xValuatorState *v = (xValuatorState *) any; 166 XValuatorState *V = (XValuatorState *) Any; 167 CARD32 *valuators = (CARD32 *) (v + 1); 168 169 V->class = v->class; 170 V->length = sizeof(XValuatorState) + 171 v->num_valuators * sizeof(int); 172 V->num_valuators = v->num_valuators; 173 V->mode = v->mode; 174 Any = (XInputClass *) (V + 1); 175 V->valuators = (int *)Any; 176 for (j = 0; j < (int)V->num_valuators; j++) 177 *(V->valuators + j) = *valuators++; 178 Any = (XInputClass *) ((char *)Any + 179 V->num_valuators * sizeof(int)); 180 } 181 break; 182 } 183 any = (XInputClass *) ((char *)any + any->length); 184 } 185 } 186 out: 187 Xfree(data); 188 189 UnlockDisplay(dpy); 190 SyncHandle(); 191 return (state); 192 } 193 194 void 195 XFreeDeviceState(XDeviceState *list) 196 { 197 XFree((char *)list); 198 } 199
Indexes created Fri Jul 03 00:25:33 UTC 2026