File: | XListDev.c |
Location: | line 164, column 47 |
Description: | The right operand of '+' is a garbage value |
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 | * XListInputDevices - Request the server to return a list of | |||
50 | * available input devices. | |||
51 | * | |||
52 | */ | |||
53 | #ifdef HAVE_CONFIG_H1 | |||
54 | #include <config.h> | |||
55 | #endif | |||
56 | ||||
57 | #include <X11/extensions/XI.h> | |||
58 | #include <X11/extensions/XIproto.h> | |||
59 | #include <X11/Xlibint.h> | |||
60 | #include <X11/extensions/XInput.h> | |||
61 | #include <X11/extensions/extutil.h> | |||
62 | #include "XIint.h" | |||
63 | #include <limits.h> | |||
64 | ||||
65 | /* Calculate length field to a multiples of sizeof(XID). XIDs are typedefs | |||
66 | * to ulong and thus may be 8 bytes on some platforms. This can trigger a | |||
67 | * SIGBUS if a class ends up not being 8-aligned (e.g. after XAxisInfo). | |||
68 | */ | |||
69 | static int pad_to_xid(int base_size) | |||
70 | { | |||
71 | int padsize = sizeof(XID); | |||
72 | ||||
73 | return ((base_size + padsize - 1)/padsize) * padsize; | |||
74 | } | |||
75 | ||||
76 | static size_t | |||
77 | SizeClassInfo(xAnyClassPtr *any, int num_classes) | |||
78 | { | |||
79 | int size = 0; | |||
80 | int j; | |||
81 | for (j = 0; j < num_classes; j++) { | |||
82 | switch ((*any)->class) { | |||
83 | case KeyClass0: | |||
84 | size += pad_to_xid(sizeof(XKeyInfo)); | |||
85 | break; | |||
86 | case ButtonClass1: | |||
87 | size += pad_to_xid(sizeof(XButtonInfo)); | |||
88 | break; | |||
89 | case ValuatorClass2: | |||
90 | { | |||
91 | xValuatorInfoPtr v; | |||
92 | ||||
93 | v = (xValuatorInfoPtr) *any; | |||
94 | size += pad_to_xid(sizeof(XValuatorInfo) + | |||
95 | (v->num_axes * sizeof(XAxisInfo))); | |||
96 | break; | |||
97 | } | |||
98 | default: | |||
99 | break; | |||
100 | } | |||
101 | *any = (xAnyClassPtr) ((char *)(*any) + (*any)->length); | |||
102 | } | |||
103 | ||||
104 | return size; | |||
105 | } | |||
106 | ||||
107 | static void | |||
108 | ParseClassInfo(xAnyClassPtr *any, XAnyClassPtr *Any, int num_classes) | |||
109 | { | |||
110 | int j; | |||
111 | ||||
112 | for (j = 0; j < num_classes; j++) { | |||
113 | switch ((*any)->class) { | |||
114 | case KeyClass0: | |||
115 | { | |||
116 | XKeyInfoPtr K = (XKeyInfoPtr) *Any; | |||
117 | xKeyInfoPtr k = (xKeyInfoPtr) *any; | |||
118 | ||||
119 | K->class = KeyClass0; | |||
120 | K->length = pad_to_xid(sizeof(XKeyInfo)); | |||
121 | K->min_keycode = k->min_keycode; | |||
122 | K->max_keycode = k->max_keycode; | |||
123 | K->num_keys = k->num_keys; | |||
124 | break; | |||
125 | } | |||
126 | case ButtonClass1: | |||
127 | { | |||
128 | XButtonInfoPtr B = (XButtonInfoPtr) *Any; | |||
129 | xButtonInfoPtr b = (xButtonInfoPtr) *any; | |||
130 | ||||
131 | B->class = ButtonClass1; | |||
132 | B->length = pad_to_xid(sizeof(XButtonInfo)); | |||
133 | B->num_buttons = b->num_buttons; | |||
134 | break; | |||
135 | } | |||
136 | case ValuatorClass2: | |||
137 | { | |||
138 | int k; | |||
139 | XValuatorInfoPtr V = (XValuatorInfoPtr) *Any; | |||
140 | xValuatorInfoPtr v = (xValuatorInfoPtr) *any; | |||
141 | XAxisInfoPtr A; | |||
142 | xAxisInfoPtr a; | |||
143 | ||||
144 | V->class = ValuatorClass2; | |||
145 | V->length = pad_to_xid(sizeof(XValuatorInfo) + | |||
146 | (v->num_axes * sizeof(XAxisInfo))); | |||
147 | V->num_axes = v->num_axes; | |||
148 | V->motion_buffer = v->motion_buffer_size; | |||
149 | V->mode = v->mode; | |||
150 | A = (XAxisInfoPtr) ((char *)V + sizeof(XValuatorInfo)); | |||
151 | V->axes = A; | |||
152 | a = (xAxisInfoPtr) ((char *)(*any) + sizeof(xValuatorInfo)); | |||
153 | for (k = 0; k < (int)v->num_axes; k++, a++, A++) { | |||
154 | A->min_value = a->min_value; | |||
155 | A->max_value = a->max_value; | |||
156 | A->resolution = a->resolution; | |||
157 | } | |||
158 | break; | |||
159 | } | |||
160 | default: | |||
161 | break; | |||
162 | } | |||
163 | *any = (xAnyClassPtr) ((char *)(*any) + (*any)->length); | |||
164 | *Any = (XAnyClassPtr) ((char *)(*Any) + (*Any)->length); | |||
| ||||
165 | } | |||
166 | } | |||
167 | ||||
168 | XDeviceInfo * | |||
169 | XListInputDevices( | |||
170 | register Display *dpy, | |||
171 | int *ndevices) | |||
172 | { | |||
173 | size_t size; | |||
174 | xListInputDevicesReq *req; | |||
175 | xListInputDevicesReply rep; | |||
176 | xDeviceInfo *list, *slist = NULL((void*)0); | |||
177 | XDeviceInfo *sclist = NULL((void*)0); | |||
178 | XDeviceInfo *clist = NULL((void*)0); | |||
179 | xAnyClassPtr any, sav_any; | |||
180 | XAnyClassPtr Any; | |||
181 | unsigned char *nptr, *Nptr; | |||
182 | int i; | |||
183 | unsigned long rlen; | |||
184 | XExtDisplayInfo *info = XInput_find_display(dpy); | |||
185 | ||||
186 | LockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->lock_display )(dpy); | |||
187 | if (_XiCheckExtInit(dpy, XInput_Initial_Release1, info) == -1) | |||
| ||||
188 | return ((XDeviceInfo *) NULL((void*)0)); | |||
189 | ||||
190 | GetReq(ListInputDevices, req)req = (xListInputDevicesReq *) _XGetRequest(dpy, 2, 4); | |||
191 | req->reqType = info->codes->major_opcode; | |||
192 | req->ReqType = X_ListInputDevices2; | |||
193 | ||||
194 | if (!_XReply(dpy, (xReply *) & rep, 0, xFalse0)) { | |||
195 | UnlockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->unlock_display )(dpy); | |||
196 | SyncHandle()if (dpy->synchandler) (*dpy->synchandler)(dpy); | |||
197 | return (XDeviceInfo *) NULL((void*)0); | |||
198 | } | |||
199 | ||||
200 | if ((*ndevices = rep.ndevices)) { /* at least 1 input device */ | |||
201 | size = *ndevices * sizeof(XDeviceInfo); | |||
202 | if (rep.length < (INT_MAX2147483647 >> 2)) { | |||
203 | rlen = rep.length << 2; /* multiply length by 4 */ | |||
204 | slist = list = Xmalloc(rlen)malloc(((rlen) == 0 ? 1 : (rlen))); | |||
205 | } | |||
206 | if (!slist) { | |||
207 | _XEatDataWords(dpy, rep.length); | |||
208 | UnlockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->unlock_display )(dpy); | |||
209 | SyncHandle()if (dpy->synchandler) (*dpy->synchandler)(dpy); | |||
210 | return (XDeviceInfo *) NULL((void*)0); | |||
211 | } | |||
212 | _XRead(dpy, (char *)list, rlen); | |||
213 | ||||
214 | any = (xAnyClassPtr) ((char *)list + (*ndevices * sizeof(xDeviceInfo))); | |||
215 | sav_any = any; | |||
216 | for (i = 0; i < *ndevices; i++, list++) { | |||
217 | size += SizeClassInfo(&any, (int)list->num_classes); | |||
218 | } | |||
219 | ||||
220 | Nptr = ((unsigned char *)list) + rlen + 1; | |||
221 | for (i = 0, nptr = (unsigned char *)any; i < *ndevices; i++) { | |||
222 | size += *nptr + 1; | |||
223 | nptr += (*nptr + 1); | |||
224 | if (nptr > Nptr) | |||
225 | goto out; | |||
226 | } | |||
227 | ||||
228 | clist = (XDeviceInfoPtr) Xmalloc(size)malloc(((size) == 0 ? 1 : (size))); | |||
229 | if (!clist) { | |||
230 | XFree((char *)slist); | |||
231 | UnlockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->unlock_display )(dpy); | |||
232 | SyncHandle()if (dpy->synchandler) (*dpy->synchandler)(dpy); | |||
233 | return (XDeviceInfo *) NULL((void*)0); | |||
234 | } | |||
235 | sclist = clist; | |||
236 | Any = (XAnyClassPtr) ((char *)clist + | |||
237 | (*ndevices * sizeof(XDeviceInfo))); | |||
238 | list = slist; | |||
239 | any = sav_any; | |||
240 | for (i = 0; i < *ndevices; i++, list++, clist++) { | |||
241 | clist->type = list->type; | |||
242 | clist->id = list->id; | |||
243 | clist->use = list->use; | |||
244 | clist->num_classes = list->num_classes; | |||
245 | clist->inputclassinfo = Any; | |||
246 | ||||
247 | ParseClassInfo(&any, &Any, (int)list->num_classes); | |||
248 | } | |||
249 | ||||
250 | clist = sclist; | |||
251 | nptr = (unsigned char *)any; | |||
252 | Nptr = (unsigned char *)Any; | |||
253 | for (i = 0; i < *ndevices; i++, clist++) { | |||
254 | clist->name = (char *)Nptr; | |||
255 | memcpy(Nptr, nptr + 1, *nptr)__builtin___memcpy_chk (Nptr, nptr + 1, *nptr, __builtin_object_size (Nptr, 0)); | |||
256 | Nptr += (*nptr); | |||
257 | *Nptr++ = '\0'; | |||
258 | nptr += (*nptr + 1); | |||
259 | } | |||
260 | } | |||
261 | ||||
262 | out: | |||
263 | XFree((char *)slist); | |||
264 | UnlockDisplay(dpy)if ((dpy)->lock_fns) (*(dpy)->lock_fns->unlock_display )(dpy); | |||
265 | SyncHandle()if (dpy->synchandler) (*dpy->synchandler)(dpy); | |||
266 | return (sclist); | |||
267 | } | |||
268 | ||||
269 | /*********************************************************************** | |||
270 | * | |||
271 | * Free the list of input devices. | |||
272 | * | |||
273 | */ | |||
274 | ||||
275 | void | |||
276 | XFreeDeviceList(XDeviceInfo *list) | |||
277 | { | |||
278 | if (list != NULL((void*)0)) { | |||
279 | XFree((char *)list); | |||
280 | } | |||
281 | } |