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/*
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* Copyright (c) 2010 Nokia Corporation and/or its subsidiary(-ies).
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* All rights reserved.
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* This component and the accompanying materials are made available
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* under the terms of "Eclipse Public License v1.0"
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* which accompanies this distribution, and is available
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* at the URL "http://www.eclipse.org/legal/epl-v10.html".
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*
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* Initial Contributors:
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* Nokia Corporation - initial contribution.
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*
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* Contributors:
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*
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* Description:
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* Name : SdpUtil.h
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* Part of : Local SDP Codec
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* Interface : -
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* Version : 1.0
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*
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*/
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/**
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@internalComponent
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*/
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#ifndef SDPUTIL_H
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#define SDPUTIL_H
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// INCLUDES
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#include <e32base.h>
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#include <stringpool.h>
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#include <e32std.h>
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#include "_sdpdefs.h"
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// FORWARD DECLARATIONS
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class RReadStream;
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class RWriteStream;
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class CSdpConnectionField;
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class CSSdpKeyField;
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class CSdpOriginField;
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class TInetAddr;
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// CLASS DECLARATION
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/**
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* Common utilities used in the implementation of the Local SDP codec.
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* Utility class, cannot be instantiated
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*/
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class SdpUtil
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{
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public: // New functions
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/**
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* Generic method that checks that all aValue's chars are not on illegal charset
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*
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* @param aIllegalChars Illegal character set
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* @param aValue String to be checked
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* @param aStart Start position of the string
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* @param aEnd End position of the string
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* @return Validity of the string
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*/
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static TBool IsValidCharSet(
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const TDesC8& aIllegalChars, const TDesC8& aValue, TInt aStart, TInt aEnd );
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/**
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* Checks that token list is valid (tokens with space as delimiter)
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*
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* @param aValue String containing tokens
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* @return Validity of the string
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*/
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static TBool IsTokenList( const TDesC8& aValue );
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/**
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* Checks that the token is valid (substring inside string)
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*
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* @param aValue String containing the token
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* @param aStart Start position of the token inside the string
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* @param aEnd End position of the token inside the string
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* @return Validity of the token
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*/
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static TBool IsToken( const TDesC8& aValue, TInt aStart, TInt aEnd );
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/**
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* Checks that the token is valid
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*
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* @param aValue Token string
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* @return Validity of the token
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*/
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static TBool IsToken( const TDesC8& aValue );
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/**
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* Checks that the byte string is valid (substring inside string)
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*
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* @param aValue String
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* @param aStart Start position of the byte string inside the string
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* @param aEnd End position of the byte string inside the string
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* @return Validity of the byte string
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*/
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static TBool IsByteString( const TDesC8& aValue, TInt aStart, TInt aEnd );
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/**
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* Checks that the byte string is valid
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*
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* @param aValue String containing the token
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* @return Validity of the byte string
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*/
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static TBool IsByteString( const TDesC8& aValue );
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/**
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* Checks that the substring is a token-byte string pair with colon char
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* as delimiter of the two strings
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*
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* @param aValue String containing the pair
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* @param aStart Start position of the string pair
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* @param aEnd End position of the string pair
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* @return Validity of the pair
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*/
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static TBool IsTokenTextPair(
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const TDesC8& aValue, TInt aStart, TInt aEnd );
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/**
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* Checks that the string conatins valid token-byte string pair with color
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* char as delimiter of the two strings
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*
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* @param aValue String containing the pair
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* @return Validity of the byte string
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*/
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static TBool IsTokenTextPair( const TDesC8& aValue );
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/**
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* Checks that the string does not contain any whitespace characters
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static TBool IsNonWhitespace( const TDesC8& aValue );
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/**
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* Checks that the string contains a valid NTP-time element
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static TBool IsValidNtpTime( const TDesC8& aValue );
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/**
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* Divides the buffer into a number of lines. Each line is marked
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* as a TPtrC8 object and added to array that is returned to the user
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* NOTE! Each line in the returned array ends in LF character
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* NOTE! The aLines must end in LF character, not '\0' character
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*
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* @param aLines Buffer that contains all the string
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* @param aErrCode Error code that is used on leave situations, when the
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* aLines parameter contains invalid string set
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* @return Array that contains the division of buffer to lines
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*/
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static RArray<TPtrC8> DivideToLinesL(
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const TDesC8& aLines, TInt aErrCode );
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/**
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* Parses elements from each line. The first item in the returned array
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* is the field attribute and equal character (e.g. "a=", "c="), following
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* elements are parsed from the string using space character as delimiter
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*
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* @param aLine String containing line that ends to LF character
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* @param aErrCode Error code that is used on leave situations, when
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* the contents of aLine are illegal
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* @return Array that contains the division of string to elements
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*/
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static RArray<TPtrC8> GetElementsFromLineL(
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const TDesC8& aLine, TInt aErrCode );
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/**
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* Parses elements from each line. The first item in the returned array
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* is the field attribute and equal character (e.g. "a=", "c="), following
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* elements are parsed from the string using aDelimiter as delimiter
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*
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* @param aLine String containing line that ends to LF character
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* @param aDelimiter Delimiter character
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* @param aErrCode Error code that is used on leave situations, when
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* the contents of aLine are illegal
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* @return Array that contains the division of string to elements
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*/
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static RArray<TPtrC8> GetElementsFromLineL(
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const TDesC8& aLine, TChar aDelimiter, TInt aErrCode );
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/**
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* Parses elements from each line. The first item in the returned array
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* is the field attribute and equal character (e.g. "a=", "c="), following
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* elements are parsed from the string using space character as delimiter
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*
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* @param aLexer Lexer that has been initialized with the string
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* @param aErrCode Error code that is used on leave situations, when
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* the contents of aLine are illegal
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* @return Array that contains the division of string to elements
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*/
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static RArray<TPtrC8> GetElementsFromLineL(
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TLex8& aLexer, TChar aDelimiter, TInt aErrCode );
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/**
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* Checks if the string contains only POS-DIGIT characters
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*
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* @param aDes String
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* @return Validity of POS-DIGIT string
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*/
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static TBool IsPosDigit( const TDesC8& aDes );
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/**
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* Checks if the string contains only DIGIT characters
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*
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* @param aDes String
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* @return Validity of DIGIT string
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*/
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static TBool IsDigit( const TDesC8& aDes );
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/**
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* Checks if the string contains valid characters
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*
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* @param aValidChars Valid characters allowed in the string
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* @param aDes String
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* @return Validity of the string
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*/
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static TBool IsValidChars( const TDesC8& aValidChars, const TDesC8& aDes );
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/**
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* Checks if the string contains only token characters
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static TBool IsTokenChar( const TDesC8& aValue );
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/**
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* Checks if the character is a valid token character
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*
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* @param aChar Character
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* @return Validity of the character
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*/
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static TBool IsTokenChar( TChar aChar );
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/**
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* Checks if the string is a valid token. The string can contain slash character,
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* which divides the line into two tokens. The two tokens are then individually
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* verified.
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static TBool IsTokenCharWithOptionalSlash( const TDesC8& aValue );
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/**
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* Checks if the string is a valid token. The string can contain space characters,
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* which divides the string into a number of tokens. Each token is then individually
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* verified.
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static TBool IsTokenCharWithSpacesL( const TDesC8& aValue );
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/**
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* Checks if the string is a valid token. The string can contain slash character,
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* which divides the line into two tokens. The two tokens are then individually
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* verified.
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*
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* @param aValue String
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* @return Validity of the string
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*/
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static void EncodeBufferL(
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const TDesC8& aValue, TInt aIndex, RWriteStream& aStream );
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/**
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* Sets default network type ("IN") and default address type ("IP4" or "IP6")
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* to variables given as parameters
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*
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* @param aPool String pool
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* @param aInetAddr Internet address
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* @param aNetType Network type
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* @param aAddressType Address type
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*/
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static void SetDefaultNetTypeAndAddrType(
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RStringPool aPool, const TInetAddr& aAddress,
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RStringF& aNetType, RStringF& aAddressType );
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/**
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* Skips spaces until next line break, if the line break can be found.
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* @param aLexer
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* @return ETrue if the line break was found, otherwise EFalse.
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*/
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static TBool SkipSpacesUntilNextLineBreak( TLex8& aLexer );
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private:
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/**
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* After the field tag has been parsed out, all the field elements are
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* parsed in this method
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*
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* @param aArray Reference to the array that contains the chopped elements
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* @param aLexer Used lexer
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* @param aDelimiter Delimiter character that determines the separation of elements
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* @param aErrCode The error code that is used on leaves, when the argument is invalid
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*/
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static void ChopElementsFromLineL(
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RArray<TPtrC8>& aArray, TLex8& aLexer, TChar aDelimiter, TInt aErrCode );
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/**
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* Private constructor
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* This class can never be instantiated
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*/
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SdpUtil();
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};
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#endif
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