| 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 | } |