core/src/lexer.h
author Tom Sutcliffe <thomas.sutcliffe@accenture.com>
Sun, 17 Oct 2010 18:43:12 +0100
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child 95 b3ffff030d5c
permissions -rw-r--r--
Fixed lots of issues with installing a low-caps version of fshell from SIS file. * Fixed issue in CCommandFactory whereby some APIs like GetCommandInfoL could trigger allocations on the wrong heap or signals to the wrong thread. The symptoms were often seen as a crash in the which_00 thread when running ciftest. * Lots of build fixes for when FSHELL_PROTECTED_UIDS isn't defined and when all capabilities aren't available. * Added new platform.mmh macro FSHELL_OPEN_SIGNED. * Open signing of fshell SIS files is now supported for production S60 handsets. Build fshell with the FSHELL_OPEN_SIGNED macro defined (and without defining FSHELL_CAP_ALL or FSHELL_PROTECTED_UIDS) in your platform.mmh and submit \epoc32\fshell\fshell.unsigned.sis to https://www.symbiansigned.com/app/page/public/openSignedOnline.do . The following commands are not available when using Open Signing due to Platform Security restrictions: fdb; kerninfo; chunkinfo; svrinfo; objinfo; sudo; fsck; localdrive; ramdefrag; readmem; reboot; setcritical; setpriority. Others such as chkdeps, e32header, ps, and fshell itself will run but in a restricted capacity (for example, fshell will no longer allow you to modify files in the \sys\bin directory). * Removed commands objinfo, svrinfo, chunkinfo, readmem, fsck completely when memory access isn't present - previously they would still appear in the help but would give an error if you tried to run them.
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// lexer.h
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// 
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// Copyright (c) 2006 - 2010 Accenture. All rights reserved.
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// This component and the accompanying materials are made available
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// under the terms of the "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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// Accenture - Initial contribution
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//
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#ifndef __LEXER_H__
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#define __LEXER_H__
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#include <e32base.h>
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class CReservedLookup;
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class TToken
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	{
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public:
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	enum TType
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		{
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		ENull,
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		EString,
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		EPipe,
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		EDoublePipe,
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		ERedirectStdinFromFile,
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		ERedirectStdoutToFile,
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		ERedirectStdoutToFileAppend,
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		ERedirectStdoutToStderr,
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		ERedirectStderrToFile,
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		ERedirectStderrToFileAppend,
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		ERedirectStderrToStdout,
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		EAmpersand,
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		EDoubleAmpersand,
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		EAmpersandPipe,
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		ENewLine,
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		ESemicolon,
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		EVariable
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		};
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public:
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	TToken();
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	TToken(TType aType, const TDesC& aToken, TInt aPos);
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	TToken& operator=(const TToken& aToken);
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	TType Type() const;
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	TInt Position() const;
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	const TDesC& String() const;
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private:
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	TType iType;
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	TPtrC iToken;
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	TInt iPos;
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	};
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class CLexer : public CBase
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	{
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public:
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	enum TBehaviour
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		{
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		EHandleSingleQuotes	= 0x00000001,	///< Causes text within single quotes to be reported as a single TToken::EString type token.
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		EHandleDoubleQuotes	= 0x00000002,	///< Causes text within double quotes to be reported as a single TToken::EString type token.
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		EHandleComments		= 0x00000004	///< Causes text following a '#' until the end of the line to be discarded.
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		};
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public:
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	static CLexer* NewL();
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	static CLexer* NewL(TUint aBehaviour);
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	static CLexer* NewLC();
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	static CLexer* NewLC(TUint aBehaviour);
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	~CLexer();
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	void DefineTokenTypeL(TToken::TType aTokenType, const TDesC& aString);
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	void Set(const TDesC& aDes, const TChar& aEscapeChar);
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	TToken NextToken();
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	TInt CurrentOffset() const;
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	TBool More();
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private:
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	CLexer(TUint aBehaviour);
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	void ConstructL();
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	void SkipSingleQuotedChars();
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	void SkipDoubleQuotedChars();
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	void SkipComment();
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	void SkipWhiteSpace();
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private:
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	TUint iBehaviour;
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	TChar iEscapeChar;
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	TLex iLex;
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	CReservedLookup* iReservedLookup;
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	};
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#endif // __LEXER_H__