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Diffstat (limited to 'src/XGetDProp.c')
| -rw-r--r-- | src/XGetDProp.c | 139 |
1 files changed, 139 insertions, 0 deletions
diff --git a/src/XGetDProp.c b/src/XGetDProp.c new file mode 100644 index 0000000..5d44f91 --- /dev/null +++ b/src/XGetDProp.c @@ -0,0 +1,139 @@ +/************************************************************ + +Copyright 2008 Peter Hutterer + +Permission to use, copy, modify, distribute, and sell this software and its +documentation for any purpose is hereby granted without fee, provided that +the above copyright notice appear in all copies and that both that +copyright notice and this permission notice appear in supporting +documentation. + +The above copyright notice and this permission notice shall be included in +all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN +AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN +CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. + +Except as contained in this notice, the name of the author shall not be +used in advertising or otherwise to promote the sale, use or other dealings +in this Software without prior written authorization from the author. + +*/ + +/*********************************************************************** + * XGetDeviceProperties - get an input device's properties. + */ + +#ifdef HAVE_CONFIG_H +#include <config.h> +#endif + +#include <X11/Xlibint.h> +#include <X11/extensions/XI.h> +#include <X11/extensions/XIproto.h> +#include <X11/extensions/XInput.h> +#include <X11/extensions/extutil.h> +#include "XIint.h" + +int +XGetDeviceProperty(Display* dpy, XDevice* dev, + Atom property, long offset, long length, Bool delete, + Atom req_type, Atom *actual_type, int *actual_format, + unsigned long *nitems, unsigned long *bytes_after, + unsigned char **prop) +{ + xGetDevicePropertyReq *req; + xGetDevicePropertyReply rep; + long nbytes, rbytes; + + XExtDisplayInfo *info = XInput_find_display(dpy); + + LockDisplay(dpy); + if (_XiCheckExtInit(dpy, XInput_Initial_Release, info) == -1) + return 1; + + GetReq(GetDeviceProperty, req); + req->reqType = info->codes->major_opcode; + req->ReqType = X_GetDeviceProperty; + req->deviceid = dev->device_id; + req->property = property; + req->type = req_type; + req->longOffset = offset; + req->longLength = length; + req->delete = delete; + + if (!_XReply (dpy, (xReply *) &rep, 0, xFalse)) + { + UnlockDisplay (dpy); + SyncHandle (); + return 1; + } + + *prop = (unsigned char *) NULL; + + if (rep.propertyType != None) { + /* + * One extra byte is malloced than is needed to contain the property + * data, but this last byte is null terminated and convenient for + * returning string properties, so the client doesn't then have to + * recopy the string to make it null terminated. + */ + switch (rep.format) { + case 8: + nbytes = rep.nItems; + rbytes = rep.nItems + 1; + if (rbytes > 0 && + (*prop = (unsigned char *) Xmalloc ((unsigned)rbytes))) + _XReadPad (dpy, (char *) *prop, nbytes); + break; + + case 16: + nbytes = rep.nItems << 1; + rbytes = rep.nItems * sizeof (short) + 1; + if (rbytes > 0 && + (*prop = (unsigned char *) Xmalloc ((unsigned)rbytes))) + _XRead16Pad (dpy, (short *) *prop, nbytes); + break; + + case 32: + nbytes = rep.nItems << 2; + rbytes = rep.nItems * sizeof (long) + 1; + if (rbytes > 0 && + (*prop = (unsigned char *) Xmalloc ((unsigned)rbytes))) + _XRead32 (dpy, (long *) *prop, nbytes); + break; + + default: + /* + * This part of the code should never be reached. If it is, + * the server sent back a property with an invalid format. + */ + nbytes = rep.length << 2; + _XEatData(dpy, (unsigned long) nbytes); + UnlockDisplay(dpy); + SyncHandle(); + return(BadImplementation); + } + if (! *prop) { + _XEatData(dpy, (unsigned long) nbytes); + UnlockDisplay(dpy); + SyncHandle(); + return(BadAlloc); + } + (*prop)[rbytes - 1] = '\0'; + } + + *actual_type = rep.propertyType; + *actual_format = rep.format; + *nitems = rep.nItems; + *bytes_after = rep.bytesAfter; + UnlockDisplay (dpy); + SyncHandle (); + + return Success; +} + |