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/* $Xorg: cmsProp.c,v 1.3 2000/08/17 19:45:10 cpqbld Exp $ */
/*
*
* Code and supporting documentation (c) Copyright 1990 1991 Tektronix, Inc.
* All Rights Reserved
*
* This file is a component of an X Window System-specific implementation
* of Xcms based on the TekColor Color Management System. Permission is
* hereby granted to use, copy, modify, sell, and otherwise distribute this
* software and its documentation for any purpose and without fee, provided
* that this copyright, permission, and disclaimer notice is reproduced in
* all copies of this software and in supporting documentation. TekColor
* is a trademark of Tektronix, Inc.
*
* Tektronix makes no representation about the suitability of this software
* for any purpose. It is provided "as is" and with all faults.
*
* TEKTRONIX DISCLAIMS ALL WARRANTIES APPLICABLE TO THIS SOFTWARE,
* INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE. IN NO EVENT SHALL TEKTRONIX BE LIABLE FOR ANY
* SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER
* RESULTING FROM LOSS OF USE, DATA, OR PROFITS, WHETHER IN AN ACTION OF
* CONTRACT, NEGLIGENCE, OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
* CONNECTION WITH THE USE OR THE PERFORMANCE OF THIS SOFTWARE.
*
* NAME
* XcmsProp.c
*
* DESCRIPTION
* This utility routines for manipulating properties.
*
*/
/* $XFree86$ */
#include <X11/Xatom.h>
#include "Xlibint.h"
#include "Xcmsint.h"
#include "Cv.h"
/************************************************************************
* *
* API PRIVATE ROUTINES *
* *
************************************************************************/
/*
* NAME
* _XcmsGetElement -- get an element value from the property passed
*
* SYNOPSIS
*/
unsigned long
_XcmsGetElement(
int format,
char **pValue,
unsigned long *pCount)
/*
* DESCRIPTION
* Get the next element from the property and return it.
* Also increment the pointer the amount needed.
*
* Returns
* unsigned long
*/
{
unsigned long value;
switch (format) {
case 32:
value = *((unsigned long *)(*pValue)) & 0xFFFFFFFF;
*pValue += sizeof(unsigned long);
*pCount -= 1;
break;
case 16:
value = *((unsigned short *)(*pValue));
*pValue += sizeof(unsigned short);
*pCount -= 1;
break;
case 8:
value = *((unsigned char *) (*pValue));
*pValue += 1;
*pCount -= 1;
break;
default:
value = 0;
break;
}
return(value);
}
/*
* NAME
* _XcmsGetProperty -- Determine the existance of a property
*
* SYNOPSIS
*/
int
_XcmsGetProperty(
Display *pDpy,
Window w,
Atom property,
int *pFormat,
unsigned long *pNItems,
unsigned long *pNBytes,
char **pValue)
/*
* DESCRIPTION
*
* Returns
* 0 if property does not exist.
* 1 if property exists.
*/
{
char *prop_ret;
int format_ret;
long len = 6516;
unsigned long nitems_ret, after_ret;
Atom atom_ret;
while (XGetWindowProperty (pDpy, w, property, 0, len, False,
XA_INTEGER, &atom_ret, &format_ret,
&nitems_ret, &after_ret,
(unsigned char **)&prop_ret)) {
if (after_ret > 0) {
len += nitems_ret * (format_ret >> 3);
XFree (prop_ret);
} else {
break;
}
}
if (format_ret == 0 || nitems_ret == 0) {
/* the property does not exist or is of an unexpected type */
return(XcmsFailure);
}
*pFormat = format_ret;
*pNItems = nitems_ret;
*pNBytes = nitems_ret * (format_ret >> 3);
*pValue = prop_ret;
return(XcmsSuccess);
}
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