/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies).

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

*

* Description:  CJavaEnvInfo implementation.

*

*/

#include <e32base.h>

#include <f32file.h>

#include <pathinfo.h>

#include <javaenvinfo.h>

#include "logger.h"

namespace Java

{

TInt ParseVersionL(TLex& aVersionText,TBool aLastVersionNumber);

// User-agent header substring

_LIT(KUserAgentJavaString, "Configuration/CLDC-1.1 Profile/MIDP-2.1");

// About application Java version text

_LIT(KAboutApplicationString, "MIDP 2.1, CLDC 1.1");

// The path to resource file with java version

_LIT(KMicroeditionJavaVersionFile, "\\resource\\versions\\java.txt");

// Length of temporary buffer for string manipulation

const TUint KBufferSize = 32;

// The min and max values for each version number

// const TUint KMajorVersionMinValue = 1;

const TUint KMajorVersionMaxValue = 127;

// const TUint KMinorVersionMaxValue = 9;

// const TUint KBuildVersionMinValue = 1;

// const TUint KBuildVersionMaxValue = 32767;

// ======== MEMBER FUNCTIONS ========

// ---------------------------------------------------------------------------

// JavaEnvInfo::Version()

//

// The format of the version text in the version file is:

//    <major> '.', <minor> '.' <build>

//

// @return Java environment version

// ---------------------------------------------------------------------------

EXPORT_C TVersion JavaEnvInfo::Version()

{

    JELOG2(EUtils);

    TVersion version(0, 0, 0);

    // the error occured during reading a version file is ignored

    TRAP_IGNORE(version = GetJavaVersionL());

    LOG3(EUtils,EInfo," JavaEnvInfo::Version: major = %d, minor = %d, build = %d",

         version.iMajor, version.iMinor, version.iBuild);

    return version;

}

// ---------------------------------------------------------------------------

// JavaEnvInfo::GetUserAgentHeaderL returns the user agent header part.

//

// @return Java related user agent header substring

// ---------------------------------------------------------------------------

EXPORT_C HBufC* JavaEnvInfo::GetUserAgentHeaderL()

{

    JELOG2(EUtils);

    HBufC* userAgentHeader = KUserAgentJavaString().AllocL();

    return userAgentHeader;

}

// ---------------------------------------------------------------------------

// JavaEnvInfo::GetUserAgentHeaderL just returns the hardcoded literal. In

// the future, this might be read from a resource file if there is need for

// localization.

//

// @return About application text

// ---------------------------------------------------------------------------

EXPORT_C HBufC* JavaEnvInfo::GetPlatformInfoL()

{

    JELOG2(EUtils);

    HBufC* aboutString = KAboutApplicationString().AllocL();

    return aboutString;

}

// ---------------------------------------------------------------------------

// JavaEnvInfo::GetJavaVersionL()

//

// The format of the version text in the version file is:

//    <major> '.', <minor> '.' <build>

//

// The version file can be either in C-drive or in ROM (Z-drive). All the

// other locations are ignored. This means that when updating the Java

// environment, the new text file must be copied to C-drive.

// ---------------------------------------------------------------------------

TVersion JavaEnvInfo::GetJavaVersionL()

{

    JELOG2(EUtils);

    RFs rfs;

    User::LeaveIfError(rfs.Connect());

    CleanupClosePushL(rfs);

    RFile file;

    //first try read the version information from C: drive

    LOG(EUtils,EInfo,"GetJavaVersionL: reading file from C: drive");

    TFileName alternateFile = TParsePtrC(

                                  PathInfo::PhoneMemoryRootPath()).Drive();

    alternateFile.Append(KMicroeditionJavaVersionFile);

    TInt ret = file.Open(rfs, alternateFile , EFileRead);

    if (ret != KErrNone)

    {

        LOG(EUtils,EInfo, " GetJavaVersionL: reading file from Z: drive");

        // if the version information file is not in C:-drive (KErrPathNotFound,

        // KErrNotFound) or can not be accessed for another reason, version

        // information is read from Z:-drive

        TFileName defaultFile = TParsePtrC(

                                    PathInfo::RomRootPath()).Drive();

        defaultFile.Append(KMicroeditionJavaVersionFile);

        User::LeaveIfError(file.Open(rfs, defaultFile, EFileRead));

        LOG(EUtils,EInfo, " GetJavaVersionL: reading file from Z: drive");

    }

    CleanupClosePushL(file);

    User::LeaveIfError(file.Size(size));

    if (size > KBufferSize)

    {

        size = KBufferSize;

    }

    HBufC8* buffer = HBufC8::NewLC(size);

    TPtr8 des = buffer->Des();

    User::LeaveIfError(file.Read(des, size));

    HBufC16* buffer16 = HBufC16::NewLC(size);

    buffer16->Des().Copy(des);

    // parse the version numbers (major, minor, build) from the string

    // leave if  error occurs in string or in its format (e.g.: missing dot char, wrong value)

    TLex versionText(buffer16->Des());

    TUint32 majorVersion = ParseVersionL(versionText,EFalse);

    TUint32 minorVersion = ParseVersionL(versionText,EFalse);

    TUint32 buildVersion = ParseVersionL(versionText,ETrue);

    TVersion version(majorVersion, minorVersion, buildVersion);

    CleanupStack::PopAndDestroy(buffer16);

    CleanupStack::PopAndDestroy(buffer);

    CleanupStack::PopAndDestroy(&file);

    CleanupStack::PopAndDestroy(&rfs);

    return version;

}

//

//

//

TInt ParseVersionL(TLex& aVersionText,TBool aLastVersionNumber)

{

    JELOG2(EUtils);

    aVersionText.Mark();

    while ((aVersionText.Peek()).IsDigit())

    {

        // move to next char

        aVersionText.Inc();

    }

    TLex partialVersionText(aVersionText.MarkedToken());

    TUint32 version(0);

    if (partialVersionText.BoundedVal(version,

                                      EDecimal,

                                      Java::KMajorVersionMaxValue) != KErrNone)

    {

        LOG(EUtils,EInfo, " GetJavaVersionL: format of value is corrupted (major version)");

        User::Leave(KErrCorrupt);

    }

    // check format

    if (!aLastVersionNumber)

    {

        if (aVersionText.Peek() == '.')

        {

            // move to the next char (should be number)

            aVersionText.Inc();

        }

        else

        {

            LOG(EUtils,EInfo, " GetJavaVersionL: format of value is corrupted");

            User::Leave(KErrCorrupt);

        }

    }

    return version;

}

}