/****************************************************************************

**

** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).

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** Contact: Nokia Corporation (qt-info@nokia.com)

**

** This file is part of the QtCore module of the Qt Toolkit.

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** GNU Lesser General Public License Usage

** This file may be used under the terms of the GNU Lesser General Public

** License version 2.1 as published by the Free Software Foundation and

** appearing in the file LICENSE.LGPL included in the packaging of this

** file. Please review the following information to ensure the GNU Lesser

** General Public License version 2.1 requirements will be met:

** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.

**

** In addition, as a special exception, Nokia gives you certain additional

** rights. These rights are described in the Nokia Qt LGPL Exception

** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.

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** GNU General Public License Usage

** Alternatively, this file may be used under the terms of the GNU General

** Public License version 3.0 as published by the Free Software Foundation

** and appearing in the file LICENSE.GPL included in the packaging of this

** file. Please review the following information to ensure the GNU General

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**

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****************************************************************************/

#include "qglobal.h"

#ifdef Q_OS_VXWORKS

#include "qplatformdefs.h"

#include "qfunctions_vxworks.h"

#include <vmLib.h>

#include <selectLib.h>

#include <ioLib.h>

QT_USE_NAMESPACE

#ifdef __cplusplus

extern "C" {

#endif

// no lfind() - used by the TIF image format

void *lfind(const void* key, const void* base, size_t* elements, size_t size,

            int (*compare)(const void*, const void*))

{

    const char* current = (char*) base;

    const char* const end = (char*) (current + (*elements) * size);

    while (current != end) {

        if (compare(current, key) == 0)

            return (void*)current;

        current += size;

    }

    return 0;

}

// no rand_r(), but rand()

// NOTE: this implementation is wrong for multi threaded applications,

// but there is no way to get it right on VxWorks (in kernel mode)

int rand_r(unsigned int * /*seedp*/)

{

    return rand();

}

// no usleep() support

int usleep(unsigned int usec)

{

    div_t dt = div(usec, 1000000);

    struct timespec ts = { dt.quot, dt.rem * 1000 };

    return nanosleep(&ts, 0);

}

// gettimeofday() is declared, but is missing from the library

// It IS however defined in the Curtis-Wright X11 libraries, so

// we have to make the symbol 'weak'

#if defined(Q_CC_DIAB)

#  pragma weak gettimeofday

#endif

int gettimeofday(struct timeval *tv, void /*struct timezone*/ *)

{

    // the compiler will optimize this and will only use one code path

    if (sizeof(struct timeval) == sizeof(struct timespec)) {

        int res = clock_gettime(CLOCK_REALTIME, (struct timespec *) tv);

        if (!res)

            tv->tv_usec /= 1000;

        return res;

    } else {

        struct timespec ts;

        int res = clock_gettime(CLOCK_REALTIME, &ts);

        if (!res) {

            tv->tv_sec = ts.tv_sec;

            tv->tv_usec = ts.tv_nsec / 1000;

        }

        return res;

    }

}

// neither getpagesize() or sysconf(_SC_PAGESIZE) are available

int getpagesize()

{

    return vmPageSizeGet();

}

// symlinks are not supported (lstat is now just a call to stat - see qplatformdefs.h)

int symlink(const char *, const char *)

{

    errno = EIO;

    return -1;

}

ssize_t readlink(const char *, char *, size_t)

{

    errno = EIO;

    return -1;

}

// there's no truncate(), but ftruncate() support...

int truncate(const char *path, off_t length)

{

    int fd = open(path, O_WRONLY, 00777);

    if (fd >= 0) {

        int res = ftruncate(fd, length);

        int en = errno;

        close(fd);

        errno = en;

        return res;

    }

    // errno is already set by open

    return -1;

}

// VxWorks doesn't know about passwd & friends.

// in order to avoid patching the unix fs path everywhere

// we introduce some dummy functions that simulate a single

// 'root' user on the system.

uid_t getuid()

{

    return 0;

}

gid_t getgid()

{

    return 0;

}

uid_t geteuid()

{

    return 0;

}

struct passwd *getpwuid(uid_t uid)

{

    static struct passwd pwbuf = { "root", 0, 0, 0, 0, 0, 0 };

    if (uid == 0) {

        return &pwbuf;

    } else {

        errno = ENOENT;

        return 0;

    }

}

struct group *getgrgid(gid_t gid)

{

    static struct group grbuf = { "root", 0, 0, 0 };

    if (gid == 0) {

        return &grbuf;

    } else {

        errno = ENOENT;

        return 0;

    }

}

#ifdef __cplusplus

} // extern "C"

#endif

#endif // Q_OS_VXWORKS