// Copyright (c) 1995-2009 Nokia Corporation and/or its subsidiary(-ies).

// All rights reserved.

// This component and the accompanying materials are made available

// under the terms of the License "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:

// e32\euser\epoc\win32\uc_utl.cpp

// 

//

#include "u32std.h"

#include <e32base.h>

#include <e32base_private.h>

#include <e32hashtab.h>

#include <emulator.h>

#include "uc_std.h"

typedef void (*TBootEpoc)(TBool);

#ifdef __LEAVE_EQUALS_THROW__

// Stub versions of TTrap exports to keep X86 and WINS versions of euser.def

// the same.

class TTrap

	{

public:

	IMPORT_C TInt Trap(TInt& aResult);

	IMPORT_C static void UnTrap();

	};

EXPORT_C TInt TTrap::Trap(TInt&)

	{

	return 0;

	}

EXPORT_C void TTrap::UnTrap()

	{

	}

#endif

EXPORT_C void EmptyFunction()

 //Function with an empty body 

	{

	}

GLDEF_C void Panic(TCdtArchitecturePanic aPanic)

//

// Panic the process with USER as the category.

//

	{

	_LIT(KCategory,"USER-Arch");

	User::Panic(KCategory,aPanic);

	}

EXPORT_C TInt User::IsRomAddress(TBool& aBool, TAny* aPtr)

//

//  The FileServer loads ROM files as ReadOnly Memory Mapped Files

//  We check the access rights of the given address for :

//      Read access

//      No write access

//

/**

Tests whether the specified address is in the ROM.

@param aBool True, if the address at aPtr is within the ROM; false, 

             otherwise.

@param aPtr  The address to be tested.

@return Always KErrNone.

*/

    {

	const TInt KRomMask = 0xFF;

	const TInt KRomAccess = PAGE_READONLY;

    aBool=EFalse;

    MEMORY_BASIC_INFORMATION mi;

	__LOCK_HOST;

    if (VirtualQuery(aPtr, &mi, sizeof(mi)) != 0 && (mi.Protect & KRomMask) == KRomAccess)

		aBool=ETrue;

    return KErrNone;

    }

EXPORT_C void BootEpoc(TBool aAutoRun)

	{

	HINSTANCE epoc = LoadLibraryA("ekern.exe");

	if (epoc)

		{

		TBootEpoc ep = (TBootEpoc)GetProcAddress(epoc, "_E32Startup");

		if (ep)

			ep(aAutoRun);

		}

	ExitProcess(102);

	}

EXPORT_C void RFastLock::Wait()

	{

	if (InterlockedDecrement((LPLONG)&iCount) < -1)

		RSemaphore::Wait();

	}

EXPORT_C void RFastLock::Signal()

	{

	if (InterlockedIncrement((LPLONG)&iCount) < 0)

		RSemaphore::Signal();

	}

// Hash an 8 bit string at aPtr, length aLen bytes.

__NAKED__ TUint32 DefaultStringHash(const TUint8* /*aPtr*/, TInt /*aLen*/)

	{

	_asm push esi

	_asm mov esi, [esp+8]

	_asm mov ecx, [esp+12]

	_asm xor eax, eax

	_asm sub ecx, 4

	_asm jb lt4

	ge4:

	_asm xor eax, [esi]

	_asm add esi, 4

	_asm mov edx, 9E3779B9h

	_asm mul edx

	_asm sub ecx, 4

	_asm jae ge4

	lt4:

	_asm add ecx, 4

	_asm jz done

	_asm xor edx, edx

	_asm cmp ecx, 2

	_asm jbe le2

	_asm mov dl, [esi+2]

	_asm shl edx, 16

	le2:

	_asm cmp ecx, 2

	_asm jb onemore

	_asm mov dh, [esi+1]

	onemore:

	_asm mov dl, [esi]

	_asm xor eax, edx

	_asm mov edx, 9E3779B9h

	_asm mul edx

	done:

	_asm pop esi

	_asm ret

	}

// Hash a 16 bit string at aPtr, length aLen bytes.

__NAKED__ TUint32 DefaultWStringHash(const TUint16* /*aPtr*/, TInt /*aLen*/)

	{

	_asm push esi

	_asm mov esi, [esp+8]

	_asm mov ecx, [esp+12]

	_asm xor eax, eax

	_asm sub ecx, 8

	_asm jb lt8

	ge8:

	_asm mov edx, [esi+4]

	_asm xor eax, [esi]

	_asm add esi, 8

	_asm rol edx, 8

	_asm xor eax, edx

	_asm mov edx, 9E3779B9h

	_asm mul edx

	_asm sub ecx, 8

	_asm jae ge8

	lt8:

	_asm add ecx, 8

	_asm jz done

	_asm xor edx, edx

	_asm cmp ecx, 4

	_asm jbe le4

	_asm mov dx, [esi+4]

	_asm rol edx, 8

	_asm xor eax, edx

	_asm xor edx, edx

	le4:

	_asm cmp ecx, 4

	_asm jb onemore

	_asm mov dx, [esi+2]

	_asm shl edx, 16

	onemore:

	_asm mov dx, [esi]

	_asm xor eax, edx

	_asm mov edx, 9E3779B9h

	_asm mul edx

	done:

	_asm pop esi

	_asm ret

	}

/**

@publishedAll

@released

Calculate a 32 bit hash from a 32 bit integer.

@param	aInt	The integer to be hashed.

@return			The calculated 32 bit hash value.

*/

EXPORT_C __NAKED__ TUint32 DefaultHash::Integer(const TInt& /*aInt*/)

	{

	_asm mov edx, [esp+4]

	_asm mov eax, 9E3779B9h

	_asm mul dword ptr [edx]

	_asm ret

	}