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os/persistentdata/persistentstorage/dbms/udbms/UD_COMP.CPP
author sl
Tue, 10 Jun 2014 14:32:02 +0200
changeset 1 260cb5ec6c19
permissions -rw-r--r--
Update contrib. 
     1 // Copyright (c) 1998-2009 Nokia Corporation and/or its subsidiary(-ies).

     2 // All rights reserved.

     3 // This component and the accompanying materials are made available

     4 // under the terms of "Eclipse Public License v1.0"

     5 // which accompanies this distribution, and is available

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

     7 //

     8 // Initial Contributors:

     9 // Nokia Corporation - initial contribution.

    10 //

    11 // Contributors:

    12 //

    13 // Description:

    14 // implementation for d32comp.h

    15 // 

    16 //

    17 

    18 #include "UD_STD.H"

    19 #include "D32COMP.H"

    20 

    21 const TInt KCompareBufSize=0x200;	// 0.5K

    22 

    23 // class Comp

    24 

    25 TInt Comp::Compare(TReal32 aLeft,TReal32 aRight) __SOFTFP

    26 	{

    27 	return aLeft<aRight ? -1 : aLeft!=aRight;

    28 	}

    29 

    30 TInt Comp::Compare(TReal64 aLeft,TReal64 aRight) __SOFTFP

    31 	{

    32 	return aLeft<aRight ? -1 : aLeft!=aRight;

    33 	}

    34 

    35 TInt Comp::Compare(const TInt64& aLeft,const TInt64& aRight)

    36 	{

    37 	return aLeft<aRight ? -1 : aLeft!=aRight;

    38 	}

    39 

    40 TInt Comp::Compare8L(MStreamBuf& aBufL,MStreamBuf& aBufR,TInt aSize,const TTextOps& aTextOp)

    41 	{

    42 	const TInt KCompareBufLength=KCompareBufSize/sizeof(TText8);

    43 	RReadStream left(&aBufL);

    44 	RReadStream right(&aBufR);

    45 	TText8 bufL[KCompareBufLength];

    46 	TText8 bufR[KCompareBufLength];

    47 	TInt read=KCompareBufLength;

    48 	do

    49 		{

    50 		if (aSize<=read)

    51 			read=aSize;

    52 		left.ReadL(bufL,read);

    53 		right.ReadL(bufR,read);

    54 		TInt r=aTextOp.Compare(bufL,read,bufR,read);

    55 		if (r!=0)

    56 			return r;

    57 		aSize-=KCompareBufLength;

    58 		} while (aSize>0);

    59 	return 0;

    60 	}

    61 

    62 TInt Comp::Compare8L(MStreamBuf& aBuf,const TText8* aPtr,TInt aSize,const TTextOps& aTextOp)

    63 	{

    64 	const TInt KCompareBufLength=KCompareBufSize/sizeof(TText8);

    65 	RReadStream strm(&aBuf);

    66 	TText8 buf[KCompareBufLength];

    67 	TInt read=KCompareBufLength;

    68 	do

    69 		{

    70 		if (aSize<read)

    71 			read=aSize;

    72 		strm.ReadL(buf,read);

    73 		TInt r=aTextOp.Compare(buf,read,aPtr,read);

    74 		if (r!=0)

    75 			return r;

    76 		aPtr+=KCompareBufLength;

    77 		aSize-=KCompareBufLength;

    78 		} while (aSize>0);

    79 	return 0;

    80 	}

    81 

    82 TInt Comp::Compare8L(MStreamBuf& aBuf,TInt aSize,const TDesC8& aDes,const TTextOps& aTextOp)

    83 	{

    84 	const TText8* ptr=aDes.Ptr();

    85 	TInt size=aDes.Length();

    86 	TInt r=Compare8L(aBuf,ptr,Min(size,aSize),aTextOp);

    87 	return r ? r : aSize-size;

    88 	}

    89 

    90 TInt Comp::Compare16L(MStreamBuf& aBufL,MStreamBuf& aBufR,TInt aSize,const TTextOps& aTextOp)

    91 	{

    92 	aSize >>= 1;

    93 	const TInt KCompareBufLength=KCompareBufSize/sizeof(TText16);

    94 	RReadStream left(&aBufL);

    95 	RReadStream right(&aBufR);

    96 	TText16 bufL[KCompareBufLength];

    97 	TText16 bufR[KCompareBufLength];

    98 	TInt read=KCompareBufLength;

    99 	do

   100 		{

   101 		if (aSize<=read)

   102 			read=aSize;

   103 		left.ReadL(bufL,read);

   104 		right.ReadL(bufR,read);

   105 		TInt r=aTextOp.Order(bufL,read,bufR,read);

   106 		if (r!=0)

   107 			return r;

   108 		aSize-=KCompareBufLength;

   109 		} while (aSize>0);

   110 	return 0;

   111 	}

   112 

   113 TInt Comp::Compare16L(MStreamBuf& aBuf,const TText16* aPtr,TInt aSize,const TTextOps& aTextOp)

   114 	{

   115 	aSize >>= 1;

   116 	const TInt KCompareBufLength=KCompareBufSize/sizeof(TText16);

   117 	RReadStream strm(&aBuf);

   118 	TText16 buf[KCompareBufLength];

   119 	TInt read=KCompareBufLength;

   120 	do

   121 		{

   122 		if (aSize<read)

   123 			read=aSize;

   124 		strm.ReadL(buf,read);

   125 		TInt r=aTextOp.Order(buf,read,aPtr,read);

   126 		if (r!=0)

   127 			return r;

   128 		aPtr+=KCompareBufLength;

   129 		aSize-=KCompareBufLength;

   130 		} while (aSize>0);

   131 	return 0;

   132 	}

   133 

   134 static TInt DoCompare16L(MStreamBuf& aBuf,const TText16* aPtr,TInt aLen,const TTextOps& aTextOp)

   135 	{

   136 	const TInt KCompareBufLength=KCompareBufSize/sizeof(TText16);

   137 	RReadStream strm(&aBuf);

   138 	TText16 buf[KCompareBufLength];

   139 	TInt read=KCompareBufLength;

   140 	do

   141 		{

   142 		if (aLen<read)

   143 			read=aLen;

   144 		strm.ReadL(buf,read);

   145 		TInt r=aTextOp.Compare(buf,read,aPtr,read);

   146 		if (r!=0)

   147 			return r;

   148 		aPtr+=KCompareBufLength;

   149 		aLen-=KCompareBufLength;

   150 		} while (aLen>0);

   151 	return 0;

   152 	}

   153 	

   154 TInt Comp::Compare16L(MStreamBuf& aBuf,TInt aSize,const TDesC16& aDes,const TTextOps& aTextOp)

   155 	{

   156 	const TText16* ptr=aDes.Ptr();

   157 	TInt size=aDes.Length()<<1;

   158 	TInt r=::DoCompare16L(aBuf,ptr,Min(size,aSize)>>1,aTextOp);

   159 	return r ? r : aSize-size;

   160 	}

   161
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