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/*
* Copyright © 2012-2013 Red Hat, Inc.
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) 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 AUTHORS OR COPYRIGHT HOLDERS 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.
*
*/
#ifndef _ATOM_HELPERS_H_
#define _ATOM_HELPERS_H_
#include <stdint.h>
#include <xorg/gtest/xorg-gtest.h>
#include <X11/Xatom.h>
#include <X11/extensions/XInput2.h>
#define ASSERT_PROPERTY(_type, _name, _dpy, _deviceid, _propname) \
ASSERT_TRUE(DevicePropertyExists(_dpy, _deviceid, _propname)); \
XITProperty<_type> _name(_dpy, _deviceid, _propname);
template <typename DataType>
class XITProperty {
private:
/* I'm too lazy for that right now. */
XITProperty(const XITProperty&);
XITProperty& operator=(const XITProperty &);
::Display *dpy;
int deviceid;
public:
Atom type;
int format;
unsigned long nitems;
DataType *data;
Atom prop;
std::string propname;
XITProperty(::Display *dpy, int deviceid, const std::string &propname);
XITProperty(::Display *dpy, int deviceid, const std::string &propname,
Atom type, int format, unsigned long nitems, const DataType *data);
~XITProperty();
/**
* Resize the data member to hold nitems.
*/
void Resize(size_t nitems);
void Update(void);
/**
* Get value at index, throw an exception if we're OOB.
*/
DataType At(size_t index) const;
/**
* Set value at index, resizing data as-needed.
*/
void Set(size_t index, DataType value);
};
bool DevicePropertyExists(::Display *dpy, int deviceid, const std::string &propname);
template <typename DataType>
XITProperty<DataType>::XITProperty(::Display *dpy, int deviceid, const std::string &propname)
{
this->dpy = dpy;
this->deviceid = deviceid;
this->format = -1;
this->data = NULL;
if (!DevicePropertyExists(dpy, deviceid, propname)) {
ADD_FAILURE() << "Property " << propname << " does not exist on device";
return;
}
prop = XInternAtom(dpy, propname.c_str(), True);
unsigned char *d = nullptr;
unsigned long bytes_after;
XIGetProperty(dpy, deviceid, prop, 0, 1000, False,
AnyPropertyType, &type, &format, &nitems, &bytes_after, &d);
if (!d)
return;
/* XI2 32-bit properties are actually 32 bit, Atom is > 4, so copy over
* where needed */
data = new DataType[nitems];
if (sizeof(DataType) > 4) {
for (unsigned int i = 0; i < nitems; i++)
data[i] = reinterpret_cast<int32_t*>(d)[i];
} else
memcpy(data, d, nitems * sizeof(DataType));
XFree(d);
}
template <typename DataType>
XITProperty<DataType>::XITProperty(::Display *dpy, int deviceid, const std::string &propname,
Atom type, int format, unsigned long nitems, const DataType *data)
{
if (format != 8 && format != 16 && format != 32) {
ADD_FAILURE() << "Invalid format " << format;
return;
}
this->format = format;
this->nitems = nitems;
this->data = new DataType[nitems];
memcpy(this->data, data, nitems * sizeof(data));
union {
unsigned char *c;
unsigned short *s;
uint32_t *i;
} d;
d.c = new unsigned char[format/8 * nitems];
for (unsigned int i = 0; i < nitems; i++) {
switch(format) {
case 8: d.c[i] = data[i]; break;
case 16: d.s[i] = data[i]; break;
case 32: d.i[i] = data[i]; break;
}
}
prop = XInternAtom(dpy, propname.c_str(), False);
XIChangeProperty(dpy, deviceid, prop, type, format, PropModeReplace, d.c, nitems);
XSync(dpy, False);
delete[] d.c;
}
template <typename DataType>
void XITProperty<DataType>::Update(void)
{
unsigned char *d;
/* XI2 32-bit properties are actually 32 bit, Atom is > 4, so copy over
* where needed */
if (sizeof(DataType) > 4) {
int32_t tmp[nitems];
for (unsigned int i = 0; i < nitems; i++)
tmp[i] = data[i];
d = reinterpret_cast<unsigned char*>(tmp);
} else
d = reinterpret_cast<unsigned char*>(data);
XIChangeProperty(dpy, deviceid, prop, type, format, PropModeReplace, d, nitems);
XSync(dpy, False);
}
template <typename DataType>
void XITProperty<DataType>::Resize(size_t nitems)
{
size_t sz = (sizeof(DataType) >= 4) ? 4 : sizeof(DataType);
data = reinterpret_cast<DataType*>(realloc(data, nitems * sz));
if (nitems > this->nitems)
memset(&data[this->nitems], 0, (nitems - this->nitems) * sz);
this->nitems = nitems;
}
template <typename DataType>
XITProperty<DataType>::~XITProperty()
{
delete[] data;
}
template <typename DataType>
DataType XITProperty<DataType>::At(size_t index) const
{
if (index > nitems)
throw new std::runtime_error("Array index out of bounds");
return data[index];
}
template <typename DataType>
void XITProperty<DataType>::Set(size_t index, DataType value)
{
if (index >= nitems)
Resize(index + 1);
data[index] = value;
}
#endif /* _ATOM_HELPERS_H_ */
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