--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/sysperfana/heapanalyser/Libraries/Engine/HeapLib/Cells/Descriptors/Implementations/Ascii/DesAsciiAlgorithmBase.cs	Tue Jun 15 12:47:20 2010 +0300
@@ -0,0 +1,127 @@
+/*
+* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
+* All rights reserved.
+*
+* Redistribution and use in source and binary forms, with or without
+* modification, are permitted provided that the following conditions are met:
+*
+* - Redistributions of source code must retain the above copyright notice,
+*   this list of conditions and the following disclaimer.
+* - Redistributions in binary form must reproduce the above copyright notice,
+*   this list of conditions and the following disclaimer in the documentation
+*   and/or other materials provided with the distribution.
+* - Neither the name of Nokia Corporation nor the names of its contributors
+*   may be used to endorse or promote products derived from this software
+*   without specific prior written permission.
+*
+* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
+* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+* POSSIBILITY OF SUCH DAMAGE.
+* 
+* Initial Contributors:
+* Nokia Corporation - initial contribution.
+*
+* Contributors:
+*
+* Description: 
+*
+*/
+
+using System;
+using System.Collections.Generic;
+using System.Text;
+using SymbianUtils.RawItems;
+using HeapLib.Statistics;
+
+namespace HeapLib.Cells.Descriptors.Implementations.Ascii
+{
+    internal class DesAsciiAlgorithmBase : DescriptorAlgorithmBase
+    {
+        #region Constructors & destructor
+        public DesAsciiAlgorithmBase( HeapStatistics aStats )
+            : base( aStats )
+        {
+        }
+        #endregion
+
+        #region Internal constants
+        protected const int KDescriptorRawItemOffsetEBufC = KDescriptorRawItemOffsetAfterLengthAndType + 1; // Allows for [Type+Length] + MaxLength
+        #endregion
+
+        #region Internal methods
+        protected string ConvertToText( int aLengthInUnicodeChars )
+        {
+            return ConvertToText( aLengthInUnicodeChars, KDescriptorRawItemOffsetAfterLengthAndType );
+        }
+
+        protected string ConvertToText( int aLengthInAsciiChars, int aStartRawItemIndex )
+        {
+            StringBuilder text = new StringBuilder();
+            for ( int i = aStartRawItemIndex; i < RawItems.Count && i < Math.Min( aLengthInAsciiChars, DescriptorAlgorithmBase.KDescriptorTextMaxLength ); i++ )
+            {
+                RawItem item = RawItems[ i ];
+                //
+                text.Append( item.OriginalCharacterisedData );
+            }
+            //
+            string ret = text.ToString();
+            if ( ret.Length > aLengthInAsciiChars )
+            {
+                ret = ret.Substring( 0, aLengthInAsciiChars );
+            }
+            return ret;
+        }
+
+        protected int PrintableCharacterCount( int aMaxNumberOfAsciiBytesToProcess, out bool aAllBytesWereAsciiCharacters )
+        {
+            return PrintableCharacterCount( aMaxNumberOfAsciiBytesToProcess, KDescriptorRawItemOffsetAfterLengthAndType, out aAllBytesWereAsciiCharacters );
+        }
+
+        protected int PrintableCharacterCount( int aMaxNumberOfAsciiBytesToProcess, int aStartRawItemIndex, out bool aAllBytesWereAsciiCharacters )
+        {
+            int printableCharCount = 0;
+            int bytesRemaining = aMaxNumberOfAsciiBytesToProcess;
+
+            for ( int i = aStartRawItemIndex; i < RawItems.Count && bytesRemaining > 0; i++ )
+            {
+                RawItem item = RawItems[ i ];
+                byte[] data = item.DataArray;
+                //
+                for ( int j = 0; j < data.Length && bytesRemaining > 0; j++ )
+                {
+                    byte b = data[ j ];
+                    bool byteIsPrint = IsPrintableAsciiCharacter( b );
+                    if ( byteIsPrint )
+                    {
+                        ++printableCharCount;
+                    }
+                    --bytesRemaining;
+                }
+            }
+            //
+            aAllBytesWereAsciiCharacters = ( aMaxNumberOfAsciiBytesToProcess == printableCharCount );
+            return printableCharCount;
+        }
+
+        protected static bool IsPrintableAsciiCharacter( byte aByte )
+        {
+            bool ret = false;
+            //
+            if ( aByte >= 32 /*SPACE*/ && aByte < 127 /*DEL*/ || aByte == 0x0D /*CR*/ || aByte == 0x0A /*LF*/ || aByte == 0x09 /*TAB*/ )
+            {
+                ret = true;
+            }
+            //
+            return ret;
+        }
+        #endregion
+    }
+}