/****************************************************************************
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** This file is part of the Qt Mobility Components.
**
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** ensure the GNU Lesser General Public License version 2.1 requirements
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** Foundation and appearing in the file LICENSE.GPL included in the
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****************************************************************************/

#include "qudevservice_linux_p.h"

QTM_BEGIN_NAMESPACE

QUdevService::QUdevService()
{
    // NOTE: udev_new can fail, if we get a NULL pointer back, can't create udev
    context = udev_new();
}

QUdevService::~QUdevService()
{
    if (context)
        udev_unref(context);
}

bool QUdevService::isSubsystemAvailable(const char *subsystem)
{
    bool available = false;
    struct udev_enumerate *enumerate = 0;
    if (context) {
        if ((enumerate = udev_enumerate_new(context))
            && (0 == udev_enumerate_add_match_subsystem(enumerate, subsystem))
            && (0 == udev_enumerate_scan_devices(enumerate))) {
            available = (0 != udev_enumerate_get_list_entry(enumerate));
        }
    }

    if (enumerate)
        udev_enumerate_unref(enumerate);

    return available;
}

bool QUdevService::isPropertyAvailable(const char *property, const char *value)
{
    bool available = false;
    struct udev_enumerate *enumerate = 0;
    if (context) {
        if ((enumerate = udev_enumerate_new(context))
            && (0 == udev_enumerate_add_match_property(enumerate, property, value))
            && (0 == udev_enumerate_scan_devices(enumerate))) {
            available = (0 != udev_enumerate_get_list_entry(enumerate));
        }
    }

    if (enumerate)
        udev_enumerate_unref(enumerate);

    return available;
}

#include "moc_qudevservice_linux_p.cpp"

QTM_END_NAMESPACE