// Copyright (c) 1996-2009 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:

// f32test\server\t_rand.cpp

// 

//

#include <f32file.h>

#include <e32test.h>

#include <e32math.h>

#include <e32hal.h>

#include "t_server.h"

GLDEF_D RTest test(_L("T_RAND"));

LOCAL_D TBuf8<512> testBuf(512);

LOCAL_D TInt64 	TheSeed=917824;

LOCAL_D TInt KMaxIteration;

LOCAL_D const TInt KMaxFiles=4;

LOCAL_D const TInt KMaxLengthIncrement=7770;

LOCAL_D const TInt mult[] = { 1, 5, 13, 37};

LOCAL_D const TInt KReduceSizeFrequency=20; // 1 reduce in ?? iterations

LOCAL_D const TInt KCheckFileFrequency=20000; // 1 check in ?? iterations

LOCAL_D const TInt KMaxBufferLength=0x8000;

LOCAL_C void WriteCluster(RFile& aFile,TInt aCluster)

//

// Extend aFile by 1 cluster

//

	{

	TUint8* bufPtr=(TUint8*)testBuf.Ptr();

	testBuf.SetLength(testBuf.MaxSize());

	Mem::Fill(bufPtr,testBuf.MaxSize(),aCluster);

	TInt r=aFile.Write(testBuf);

	test(r==KErrNone);

	}

LOCAL_C void SeekToCluster(RFile& aFile,TInt aCluster)

//

// Seek to aCluster and check it is found correctly

//

	{

	TBuf8<508> seekBuf(508);

	TInt r=aFile.Read(aCluster*testBuf.MaxSize(),seekBuf);

	test(r==KErrNone);

	test(seekBuf[0]==(TUint8)aCluster && seekBuf[507]==(TUint8)aCluster);

	}

LOCAL_C void SeekToCluster(RFile& aFile,TInt aCluster1,TInt aCluster2)

//

// Seek to aCluster and check it is found correctly

//

	{

	TBuf8<508> seekBuf(508);

	TInt r=aFile.Read(aCluster1*testBuf.MaxSize(),seekBuf);

	test(r==KErrNone);

	test(seekBuf[0]==(TUint8)aCluster1 && seekBuf[507]==(TUint8)aCluster1);

	r=aFile.Read(aCluster2*testBuf.MaxSize(),seekBuf);

	test(r==KErrNone);

	test(seekBuf[0]==(TUint8)aCluster2 && seekBuf[507]==(TUint8)aCluster2);

	}

LOCAL_C void ExhaustiveTest(RFile& aFile,TInt aCount1)

//

// Test every possible seeking combination

//

	{

	TInt i=0,k=0;

	for(k=0;k<aCount1;k++)

		{

		for(i=aCount1-1;i>0;i--)

			{

			SeekToCluster(aFile,i);

			SeekToCluster(aFile,k);

			}

		test.Printf(_L("Seek from %d          \r"),k);

		}

		test.Printf(_L("\n"));

	}

LOCAL_C void Test1()

//

// Test openning a large file

//

	{

	test.Next(_L("Create interleaved files"));

	RFile f1,f2;

//

	TInt r=f1.Replace(TheFs,_L("BIGFILE1.TST"),EFileWrite);

	test(r==KErrNone);

	r=f2.Replace(TheFs,_L("BIGFILE2.TST"),EFileWrite);

	test(r==KErrNone);

//

	TInt maxListLength=4;

	TInt i=0,k=0;

	TInt countf1=0;

	TInt countf2=0;

	for (k=0;k<maxListLength;k++)

		{

		for (i=0;i<maxListLength;i++)

			{

			TInt j;

			for (j=0;j<=i;j++)

				WriteCluster(f1,countf1++);

			for (j=0;j<=k;j++)

				WriteCluster(f2,countf2++);

			test.Printf(_L("Written %d to file1 %d to file2\n"),i+1,k+1);

			}

		}

	ExhaustiveTest(f1,countf1);

	ExhaustiveTest(f2,countf2);

	SeekToCluster(f1,1,10);

	SeekToCluster(f1,6,3);

	SeekToCluster(f1,8,4);

	SeekToCluster(f1,12,3);

	SeekToCluster(f1,23,32);

	SeekToCluster(f1,5,8);

	SeekToCluster(f1,7,9);

	SeekToCluster(f1,12,1);

	SeekToCluster(f1,2,32);

	SeekToCluster(f1,16,8);

	SeekToCluster(f1,9,5);

	SeekToCluster(f1,33,6);

	SeekToCluster(f1,13,7);

	SeekToCluster(f1,9,17);

	SeekToCluster(f1,4,5);

	SeekToCluster(f1,5,31);

	SeekToCluster(f1,11,10);

	SeekToCluster(f1,1,2);

	SeekToCluster(f1,5,5);

	f1.Close();

	f2.Close();

	r=TheFs.Delete(_L("BIGFile1.tst"));

	test(r==KErrNone);

	r=TheFs.Delete(_L("BIGFile2.tst"));

	test(r==KErrNone);

	CheckDisk();

	}

LOCAL_C void Test2()

//

// Reproduce old bugs

//

	{

	test.Next(_L("Regression Protection"));

	RFile f1,f2;

//

	TInt r=f1.Replace(TheFs,_L("BIGFILE1.TST"),EFileWrite);

	test(r==KErrNone);

	r=f2.Replace(TheFs,_L("BIGFILE2.TST"),EFileWrite);

	test(r==KErrNone);

//

	WriteCluster(f1,0);

	WriteCluster(f1,1);

	WriteCluster(f1,2);

	WriteCluster(f1,3);

	WriteCluster(f1,4);

	WriteCluster(f1,5);

	WriteCluster(f2,0);

	WriteCluster(f1,6);

//

	SeekToCluster(f1,6);

	SeekToCluster(f1,4);

//

	f1.Close();

	f2.Close();

	r=TheFs.Delete(_L("BIGFile1.tst"));

	test(r==KErrNone);

	r=TheFs.Delete(_L("BIGFile2.tst"));

	test(r==KErrNone);

	CheckDisk();

	}

LOCAL_C void Test3()

//

// Change file size while seeking

//

	{

	test.Next(_L("Alter filesize"));

	RFile f1;

	TheSeed=917824;

	TInt i=0,j=0;

//

	TInt r=f1.Replace(TheFs,_L("BIGFILE1.TST"),EFileWrite);

	test(r==KErrNone);

	r=f1.SetSize(65534);

	test(r==KErrNone);

	for(i=0;i<=15;i++)

		WriteCluster(f1,i);

	for (j=0;j<100;j++)

		{

		TInt cluster1=Math::Rand(TheSeed)%15;

		TInt cluster2=Math::Rand(TheSeed)%15;

		SeekToCluster(f1,cluster2,cluster1);

		}

	test.Next(_L("Increase Size"));

	r=f1.SetSize(1048577);

	test(r==KErrNone || r==KErrDiskFull);

	if (r==KErrDiskFull)

		{

		test.Printf(_L("File too big\n"));

		f1.Close();

		return;

		}

	test.Next(_L("Test data still present"));

	for (j=0;j<200;j++)

		{

		TInt cluster1=Math::Rand(TheSeed)%15;

		TInt cluster2=Math::Rand(TheSeed)%15;

		SeekToCluster(f1,cluster2,cluster1);

		}

	TInt newPos=8192;

	r=f1.Seek(ESeekStart,newPos);

	test(r==KErrNone);

	test.Next(_L("Write more data"));

	for(i=16;i<83;i++)

		WriteCluster(f1,i);

	test.Next(_L("Seek to new data"));

	for (j=0;j<200;j++)

		{

		TInt cluster1=Math::Rand(TheSeed)%83;

		TInt cluster2=Math::Rand(TheSeed)%83;

		SeekToCluster(f1,cluster2,cluster1);

		}

	test.Next(_L("Reduce file size"));

	r=f1.SetSize(135000);

	test(r==KErrNone);

	test.Next(_L("Test data still present"));

	for (j=0;j<200;j++)

		{

		TInt cluster1=Math::Rand(TheSeed)%31;

		TInt cluster2=Math::Rand(TheSeed)%31;

		SeekToCluster(f1,cluster2,cluster1);

		}

	f1.Close();

	}

class TFileReader

	{

public:

	TFileReader(RFile* aFile);

	void Next(TUint8& aVal,TInt& aLength);

	TBool Compare(TUint8 aVal,TInt aLength);

private:

	RFile iFile;

	TBuf8<512> iData;

	TInt iPos;

	};

TFileReader::TFileReader(RFile* aFile)

//

// Constructor

//

	: iFile(*aFile), iPos(0)

	{

	TInt r=iFile.Read(0,iData);

	test(r==KErrNone);

	}

void TFileReader::Next(TUint8& aVal,TInt& aLength)

//

// Read aLength contiguous bytes with aVal

//

	{

	if (iPos==iData.Length())

		{

		TInt r=iFile.Read(iData);

		test(r==KErrNone);

		iPos=0;

		if (iData.Length()==0)

			{

			aLength=0;

			return;

			}

		}

	aVal=iData[iPos];

	aLength=0;

	while(iPos<iData.Length())

		{

		if (iData[iPos]!=aVal)

			break;

		iPos++;

		aLength++;

		}

	}

TBool TFileReader::Compare(TUint8 aVal, TInt aLength)

//

// Compare file contents == aVal for aLength bytes

//

	{

	FOREVER

		{

		if(iPos==iData.Length())

			{

			TInt r=iFile.Read(iData);

			if (r!=KErrNone)

				{

				test.Printf(_L("READ error %d\n"),r);

				//test.Getch();

				RFs fs;

				r=fs.Connect();

				test.Printf(_L("connect returned %d\n"),r);

				//test.Getch();

				fs.Close();

				test(0);

				return(EFalse);

				}

			iPos=0;

			if (iData.Length()==0)

				{

				test.Printf(_L("\nFound Error\n"));

				test(0);

				//test.Getch();

				return(EFalse);

				}

			}

		while(iPos<iData.Length())

			{

			if (iData[iPos]!=aVal)

				{

				test.Printf(_L("\nFound Error\n"));

				test(0);

				//test.Getch();

				return(EFalse);

				}

			iPos++;

			aLength--;

			if (aLength==0)

				return(ETrue);

			}

		}

	}

LOCAL_C void CheckFileContents(RFile* aFile)

//

// Check all files have consistent contents

//

	{

	TFileReader f0(aFile);

	TFileReader f1(aFile+1);

	TFileReader f2(aFile+2);

	TFileReader f3(aFile+3);

	FOREVER

		{

		TUint8 val;

		TInt length;

		f0.Next(val,length);

		if (length==0)

			break;

		test(f1.Compare(val,length*mult[1]));

		test(f2.Compare(val,length*mult[2]));

		test(f3.Compare(val,length*mult[3]));

		}

	TUint8 val;

	TInt length;

	f1.Next(val,length);

	if (length!=0)

		{

		test.Printf(_L("\nFound Error\n"));

		test(0);

		//test.Getch();

		}

	test(length==0);

	f2.Next(val,length);

	if (length!=0)

		{

		test.Printf(_L("\nFound Error\n"));

		test(0);

		//test.Getch();

		}

	test(length==0);

	f3.Next(val,length);

	if (length!=0)

		{

		test.Printf(_L("\nFound Error\n"));

		test(0);

		//test.Getch();

		}

	test(length==0);

	}		

LOCAL_C void Test4()

//

// Read, write and resize 4 interleaved files

//

	{

	RFile f[KMaxFiles];

	HBufC8* dataBuf=HBufC8::NewL(KMaxBufferLength);

	TInt r=f[0].Replace(TheFs,_L("TEST1.DAT"),EFileWrite);

	test(r==KErrNone);

	r=f[1].Replace(TheFs,_L("TEST2.DAT"),EFileWrite);

	test(r==KErrNone);

	r=f[2].Replace(TheFs,_L("TEST3.DAT"),EFileWrite);

	test(r==KErrNone);

	r=f[3].Replace(TheFs,_L("TEST4.DAT"),EFileWrite);

	test(r==KErrNone);

	TInt size=0;

	TInt iteration=0;

	FOREVER

		{

		iteration++;

		TInt pos=(size) ? Math::Rand(TheSeed)%size : 0;

		TInt len=Math::Rand(TheSeed)%KMaxLengthIncrement;

		TInt order=Math::Rand(TheSeed)%KMaxFiles;

		TInt value=Math::Rand(TheSeed)%KMaxTUint8;

		TUint8* data=(TUint8*)dataBuf->Ptr();

		Mem::Fill(data,KMaxBufferLength,value);

		if (pos+len>size)

			size=pos+len;

		for (TInt i=0;i<KMaxFiles;i++)

			{

			TInt fileNum=(order+i)%KMaxFiles;

			TInt s=len*mult[fileNum];

			TInt filePos=pos*mult[fileNum];

			r=f[fileNum].Seek(ESeekStart,filePos);

			test(r==KErrNone);

			while(s>0)

				{

				TInt l=(s>KMaxBufferLength) ? KMaxBufferLength : s;

				dataBuf->Des().SetLength(l);

				r=f[fileNum].Write(*dataBuf);

				// Flush if write caching enabled to ensure we get disk space notifications

				if ((gDriveCacheFlags & EFileCacheWriteOn) && (r == KErrNone))

					r = f[fileNum].Flush();

				if (r==KErrDiskFull)

					goto End;

				test(r==KErrNone);

				s-=l;

				}

			}

		if ((iteration%KCheckFileFrequency)==0)

			CheckFileContents(&f[0]);

		test.Printf(_L("Iteration %d, size %d       \r"),iteration,size);

		if (iteration==KMaxIteration)

			break;

		if ((iteration%KReduceSizeFrequency)==0)

			{

			size=(size) ? Math::Rand(TheSeed)%size : 0;

			test.Printf(_L("\nReduceSize newsize=%d\n"),size);

			for (TInt i=0;i<KMaxFiles;i++)

				{

				TInt fileNum=(order+i)%KMaxFiles;

				r=f[fileNum].SetSize(size*mult[fileNum]);

				test(r==KErrNone);

				}

			CheckFileContents(&f[0]);

			}

		}

End:

	delete dataBuf;

	for (TInt i=0;i<KMaxFiles;i++)

		f[i].Close();

	test.Printf(_L("\n"));

	}

GLDEF_C void CallTestsL()

//

// Call all tests

//

	{

#if defined(__WINS__)

	if (gSessionPath[0]=='C')

		return;

#endif

	if (gSessionPath[0]=='C' || gSessionPath[0]=='Y')

		KMaxIteration=100;

	else

		KMaxIteration=100;

	CreateTestDirectory(_L("\\TRAND\\"));

	Test1();

	Test2();

	Test3();

	Test4();

	DeleteTestDirectory();

	}