Created
July 6, 2012 00:49
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libX11 ChangeProperty implementation
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/* | |
Copyright 1986, 1998 The Open Group | |
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 | |
OPEN GROUP 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 Open Group 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 Open Group. | |
*/ | |
#ifdef HAVE_CONFIG_H | |
#include <config.h> | |
#endif | |
#include "Xlibint.h" | |
int | |
XChangeProperty ( | |
register Display *dpy, | |
Window w, | |
Atom property, | |
Atom type, | |
int format, /* 8, 16, or 32 */ | |
int mode, /* PropModeReplace, PropModePrepend, PropModeAppend */ | |
_Xconst unsigned char *data, | |
int nelements) | |
{ | |
register xChangePropertyReq *req; | |
register long len; | |
LockDisplay(dpy); | |
GetReq (ChangeProperty, req); | |
req->window = w; | |
req->property = property; | |
req->type = type; | |
req->mode = mode; | |
if (nelements < 0) { | |
req->nUnits = 0; | |
req->format = 0; /* ask for garbage, get garbage */ | |
} else { | |
req->nUnits = nelements; | |
req->format = format; | |
} | |
switch (req->format) { | |
case 8: | |
len = ((long)nelements + 3)>>2; | |
if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) { | |
SetReqLen(req, len, len); | |
Data (dpy, (char *)data, nelements); | |
} /* else force BadLength */ | |
break; | |
case 16: | |
len = ((long)nelements + 1)>>1; | |
if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) { | |
SetReqLen(req, len, len); | |
len = (long)nelements << 1; | |
Data16 (dpy, (short *) data, len); | |
} /* else force BadLength */ | |
break; | |
case 32: | |
len = nelements; | |
if (dpy->bigreq_size || req->length + len <= (unsigned) 65535) { | |
SetReqLen(req, len, len); | |
len = (long)nelements << 2; | |
Data32 (dpy, (long *) data, len); | |
} /* else force BadLength */ | |
break; | |
default: | |
/* BadValue will be generated */ ; | |
} | |
UnlockDisplay(dpy); | |
SyncHandle(); | |
return 1; | |
} | |
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