summaryrefslogtreecommitdiff
path: root/sc/inc/compiler.hxx
diff options
context:
space:
mode:
Diffstat (limited to 'sc/inc/compiler.hxx')
-rw-r--r--sc/inc/compiler.hxx540
1 files changed, 540 insertions, 0 deletions
diff --git a/sc/inc/compiler.hxx b/sc/inc/compiler.hxx
new file mode 100644
index 000000000000..c492f2ff01e3
--- /dev/null
+++ b/sc/inc/compiler.hxx
@@ -0,0 +1,540 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*************************************************************************
+ *
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * Copyright 2000, 2010 Oracle and/or its affiliates.
+ *
+ * OpenOffice.org - a multi-platform office productivity suite
+ *
+ * This file is part of OpenOffice.org.
+ *
+ * OpenOffice.org is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License version 3
+ * only, as published by the Free Software Foundation.
+ *
+ * OpenOffice.org is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Lesser General Public License version 3 for more details
+ * (a copy is included in the LICENSE file that accompanied this code).
+ *
+ * You should have received a copy of the GNU Lesser General Public License
+ * version 3 along with OpenOffice.org. If not, see
+ * <http://www.openoffice.org/license.html>
+ * for a copy of the LGPLv3 License.
+ *
+ ************************************************************************/
+
+#ifndef SC_COMPILER_HXX
+#define SC_COMPILER_HXX
+
+#ifndef INCLUDED_STRING_H
+#include <string.h>
+#define INCLUDED_STRING_H
+#endif
+#include <tools/mempool.hxx>
+#include "scdllapi.h"
+#include "global.hxx"
+#include "refdata.hxx"
+#include "formula/token.hxx"
+#include "formula/intruref.hxx"
+#include "formula/grammar.hxx"
+#include <unotools/charclass.hxx>
+#include <rtl/ustrbuf.hxx>
+#include <com/sun/star/sheet/ExternalLinkInfo.hpp>
+#include <vector>
+
+#include <formula/FormulaCompiler.hxx>
+
+
+#include <boost/shared_ptr.hpp>
+
+#ifndef INCLUDED_HASH_MAP
+#include <hash_map>
+#define INCLUDED_HASH_MAP
+#endif
+
+//-----------------------------------------------
+
+// constants and data types also for external modules (ScInterpreter et al)
+
+#define MAXCODE 512 /* maximum number of tokens in formula */
+#define MAXSTRLEN 1024 /* maximum length of input string of one symbol */
+#define MAXJUMPCOUNT 32 /* maximum number of jumps (ocChose) */
+
+// flag values of CharTable
+#define SC_COMPILER_C_ILLEGAL 0x00000000
+#define SC_COMPILER_C_CHAR 0x00000001
+#define SC_COMPILER_C_CHAR_BOOL 0x00000002
+#define SC_COMPILER_C_CHAR_WORD 0x00000004
+#define SC_COMPILER_C_CHAR_VALUE 0x00000008
+#define SC_COMPILER_C_CHAR_STRING 0x00000010
+#define SC_COMPILER_C_CHAR_DONTCARE 0x00000020
+#define SC_COMPILER_C_BOOL 0x00000040
+#define SC_COMPILER_C_WORD 0x00000080
+#define SC_COMPILER_C_WORD_SEP 0x00000100
+#define SC_COMPILER_C_VALUE 0x00000200
+#define SC_COMPILER_C_VALUE_SEP 0x00000400
+#define SC_COMPILER_C_VALUE_EXP 0x00000800
+#define SC_COMPILER_C_VALUE_SIGN 0x00001000
+#define SC_COMPILER_C_VALUE_VALUE 0x00002000
+#define SC_COMPILER_C_STRING_SEP 0x00004000
+#define SC_COMPILER_C_NAME_SEP 0x00008000 // there can be only one! '\''
+#define SC_COMPILER_C_CHAR_IDENT 0x00010000 // identifier (built-in function) or reference start
+#define SC_COMPILER_C_IDENT 0x00020000 // identifier or reference continuation
+#define SC_COMPILER_C_ODF_LBRACKET 0x00040000 // ODF '[' reference bracket
+#define SC_COMPILER_C_ODF_RBRACKET 0x00080000 // ODF ']' reference bracket
+#define SC_COMPILER_C_ODF_LABEL_OP 0x00100000 // ODF '!!' automatic intersection of labels
+#define SC_COMPILER_C_ODF_NAME_MARKER 0x00200000 // ODF '$$' marker that starts a defined (range) name
+#define SC_COMPILER_C_CHAR_NAME 0x00400000 // start character of a defined name
+#define SC_COMPILER_C_NAME 0x00800000 // continuation character of a defined name
+
+#define SC_COMPILER_FILE_TAB_SEP '#' // 'Doc'#Tab
+
+
+class ScDocument;
+class ScMatrix;
+class ScRangeData;
+class ScExternalRefManager;
+class ScTokenArray;
+
+// constants and data types internal to compiler
+
+/*
+ OpCode eOp; // OpCode
+ formula::StackVar eType; // type of data
+ USHORT nRefCnt; // reference count
+ BOOL bRaw; // not cloned yet and trimmed to real size
+ */
+
+#define SC_TOKEN_FIX_MEMBERS \
+ OpCode eOp; \
+ formula::StackVar eType; \
+ USHORT nRefCnt; \
+ BOOL bRaw;
+
+struct ScDoubleRawToken
+{
+private:
+ SC_TOKEN_FIX_MEMBERS
+public:
+ union
+ { // union only to assure alignment identical to ScRawToken
+ double nValue;
+ struct {
+ BYTE cByte;
+ bool bHasForceArray;
+ } sbyte;
+ };
+ DECL_FIXEDMEMPOOL_NEWDEL( ScDoubleRawToken );
+};
+
+struct ScRawToken
+{
+ friend class ScCompiler;
+ // Friends that use a temporary ScRawToken on the stack (and therefor need
+ // the private dtor) and know what they're doing..
+ friend class ScTokenArray;
+ friend USHORT lcl_ScRawTokenOffset();
+private:
+ SC_TOKEN_FIX_MEMBERS
+public:
+ union {
+ double nValue;
+ struct {
+ BYTE cByte;
+ bool bHasForceArray;
+ } sbyte;
+ ScComplexRefData aRef;
+ struct {
+ sal_uInt16 nFileId;
+ sal_Unicode cTabName[MAXSTRLEN+1];
+ ScComplexRefData aRef;
+ } extref;
+ struct {
+ sal_uInt16 nFileId;
+ sal_Unicode cName[MAXSTRLEN+1];
+ } extname;
+ ScMatrix* pMat;
+ USHORT nIndex; // index into name collection
+ sal_Unicode cStr[ MAXSTRLEN+1 ]; // string (up to 255 characters + 0)
+ short nJump[MAXJUMPCOUNT+1]; // If/Chose token
+ };
+
+ //! other members not initialized
+ ScRawToken() : bRaw( TRUE ) {}
+private:
+ ~ScRawToken() {} //! only delete via Delete()
+public:
+ DECL_FIXEDMEMPOOL_NEWDEL( ScRawToken );
+ formula::StackVar GetType() const { return (formula::StackVar) eType; }
+ OpCode GetOpCode() const { return (OpCode) eOp; }
+ void NewOpCode( OpCode e ) { eOp = e; }
+ void IncRef() { nRefCnt++; }
+ void DecRef() { if( !--nRefCnt ) Delete(); }
+ USHORT GetRef() const { return nRefCnt; }
+ SC_DLLPUBLIC void Delete();
+
+ // Use these methods only on tokens that are not part of a token array,
+ // since the reference count is cleared!
+ void SetOpCode( OpCode eCode );
+ void SetString( const sal_Unicode* pStr );
+ void SetSingleReference( const ScSingleRefData& rRef );
+ void SetDoubleReference( const ScComplexRefData& rRef );
+ void SetDouble( double fVal );
+
+ // These methods are ok to use, reference count not cleared.
+ void SetName( USHORT n );
+ void SetExternalSingleRef( sal_uInt16 nFileId, const String& rTabName, const ScSingleRefData& rRef );
+ void SetExternalDoubleRef( sal_uInt16 nFileId, const String& rTabName, const ScComplexRefData& rRef );
+ void SetExternalName( sal_uInt16 nFileId, const String& rName );
+ void SetMatrix( ScMatrix* p );
+ void SetExternal(const sal_Unicode* pStr);
+
+ ScRawToken* Clone() const; // real copy!
+ formula::FormulaToken* CreateToken() const; // create typified token
+ void Load( SvStream&, USHORT nVer );
+
+ static xub_StrLen GetStrLen( const sal_Unicode* pStr ); // as long as a "string" is an array
+ static size_t GetStrLenBytes( xub_StrLen nLen )
+ { return nLen * sizeof(sal_Unicode); }
+ static size_t GetStrLenBytes( const sal_Unicode* pStr )
+ { return GetStrLenBytes( GetStrLen( pStr ) ); }
+};
+
+
+typedef formula::SimpleIntrusiveReference< struct ScRawToken > ScRawTokenRef;
+
+class SC_DLLPUBLIC ScCompiler : public formula::FormulaCompiler
+{
+public:
+
+ enum EncodeUrlMode
+ {
+ ENCODE_BY_GRAMMAR,
+ ENCODE_ALWAYS,
+ ENCODE_NEVER,
+ };
+
+ struct Convention
+ {
+ const formula::FormulaGrammar::AddressConvention meConv;
+
+ Convention( formula::FormulaGrammar::AddressConvention eConvP );
+ virtual ~Convention();
+
+ virtual void MakeRefStr( rtl::OUStringBuffer& rBuffer,
+ const ScCompiler& rCompiler,
+ const ScComplexRefData& rRef,
+ BOOL bSingleRef ) const = 0;
+ virtual ::com::sun::star::i18n::ParseResult
+ parseAnyToken( const String& rFormula,
+ xub_StrLen nSrcPos,
+ const CharClass* pCharClass) const = 0;
+
+ /**
+ * Parse the symbol string and pick up the file name and the external
+ * range name.
+ *
+ * @return true on successful parse, or false otherwise.
+ */
+ virtual bool parseExternalName( const String& rSymbol, String& rFile, String& rName,
+ const ScDocument* pDoc,
+ const ::com::sun::star::uno::Sequence<
+ const ::com::sun::star::sheet::ExternalLinkInfo > * pExternalLinks ) const = 0;
+
+ virtual String makeExternalNameStr( const String& rFile, const String& rName ) const = 0;
+
+ virtual void makeExternalRefStr( ::rtl::OUStringBuffer& rBuffer, const ScCompiler& rCompiler,
+ sal_uInt16 nFileId, const String& rTabName, const ScSingleRefData& rRef,
+ ScExternalRefManager* pRefMgr ) const = 0;
+
+ virtual void makeExternalRefStr( ::rtl::OUStringBuffer& rBuffer, const ScCompiler& rCompiler,
+ sal_uInt16 nFileId, const String& rTabName, const ScComplexRefData& rRef,
+ ScExternalRefManager* pRefMgr ) const = 0;
+
+ enum SpecialSymbolType
+ {
+ /**
+ * Character between sheet name and address. In OOO A1 this is
+ * '.', while XL A1 and XL R1C1 this is '!'.
+ */
+ SHEET_SEPARATOR,
+
+ /**
+ * In OOO A1, a sheet name may be prefixed with '$' to indicate an
+ * absolute sheet position.
+ */
+ ABS_SHEET_PREFIX
+ };
+ virtual sal_Unicode getSpecialSymbol( SpecialSymbolType eSymType ) const = 0;
+
+ virtual ULONG getCharTableFlags( sal_Unicode c, sal_Unicode cLast ) const = 0;
+
+ protected:
+ const ULONG* mpCharTable;
+ };
+ friend struct Convention;
+
+private:
+
+
+ static CharClass *pCharClassEnglish; // character classification for en_US locale
+ static const Convention *pConventions[ formula::FormulaGrammar::CONV_LAST ];
+
+ static const Convention * const pConvOOO_A1;
+ static const Convention * const pConvOOO_A1_ODF;
+ static const Convention * const pConvXL_A1;
+ static const Convention * const pConvXL_R1C1;
+ static const Convention * const pConvXL_OOX;
+
+ static struct AddInMap
+ {
+ const char* pODFF;
+ const char* pEnglish;
+ bool bMapDupToInternal; // when writing ODFF
+ const char* pOriginal; // programmatical name
+ const char* pUpper; // upper case programmatical name
+ } maAddInMap[];
+ static const AddInMap* GetAddInMap();
+ static size_t GetAddInMapCount();
+
+ ScDocument* pDoc;
+ ScAddress aPos;
+
+ // For CONV_XL_OOX, may be set via API by MOOXML filter.
+ ::com::sun::star::uno::Sequence< const ::com::sun::star::sheet::ExternalLinkInfo > maExternalLinks;
+
+ sal_Unicode cSymbol[MAXSTRLEN]; // current Symbol
+ String aFormula; // formula source code
+ xub_StrLen nSrcPos; // tokenizer position (source code)
+ ScRawTokenRef pRawToken;
+
+ const CharClass* pCharClass; // which character classification is used for parseAnyToken
+ USHORT mnPredetectedReference; // reference when reading ODF, 0 (none), 1 (single) or 2 (double)
+ SCsTAB nMaxTab; // last sheet in document
+ sal_Int32 mnRangeOpPosInSymbol; // if and where a range operator is in symbol
+ const Convention *pConv;
+ EncodeUrlMode meEncodeUrlMode;
+ bool mbCloseBrackets; // whether to close open brackets automatically, default TRUE
+ bool mbExtendedErrorDetection;
+ bool mbRewind; // whether symbol is to be rewound to some step during lexical analysis
+
+ BOOL NextNewToken(bool bInArray = false);
+
+ virtual void SetError(USHORT nError);
+ xub_StrLen NextSymbol(bool bInArray);
+ BOOL IsValue( const String& );
+ BOOL IsOpCode( const String&, bool bInArray );
+ BOOL IsOpCode2( const String& );
+ BOOL IsString();
+ BOOL IsReference( const String& );
+ BOOL IsSingleReference( const String& );
+ BOOL IsPredetectedReference( const String& );
+ BOOL IsDoubleReference( const String& );
+ BOOL IsMacro( const String& );
+ BOOL IsNamedRange( const String& );
+ bool IsExternalNamedRange( const String& rSymbol );
+ BOOL IsDBRange( const String& );
+ BOOL IsColRowName( const String& );
+ BOOL IsBoolean( const String& );
+ void AutoCorrectParsedSymbol();
+
+ void SetRelNameReference();
+
+ static void InitCharClassEnglish();
+
+public:
+ ScCompiler( ScDocument* pDocument, const ScAddress&);
+
+ ScCompiler( ScDocument* pDocument, const ScAddress&,ScTokenArray& rArr);
+
+public:
+ static void DeInit(); /// all
+
+ // for ScAddress::Format()
+ static void CheckTabQuotes( String& aTabName,
+ const formula::FormulaGrammar::AddressConvention eConv = formula::FormulaGrammar::CONV_OOO );
+
+ static BOOL EnQuote( String& rStr );
+ sal_Unicode GetNativeAddressSymbol( Convention::SpecialSymbolType eType ) const;
+
+
+ // Check if it is a valid english function name
+ bool IsEnglishSymbol( const String& rName );
+
+ //! _either_ CompileForFAP _or_ AutoCorrection, _not_ both
+ // #i101512# SetCompileForFAP is in formula::FormulaCompiler
+ void SetAutoCorrection( BOOL bVal )
+ { bAutoCorrect = bVal; bIgnoreErrors = bVal; }
+ void SetCloseBrackets( bool bVal ) { mbCloseBrackets = bVal; }
+ void SetRefConvention( const Convention *pConvP );
+ void SetRefConvention( const formula::FormulaGrammar::AddressConvention eConv );
+
+ /// Set symbol map if not empty.
+ void SetFormulaLanguage( const OpCodeMapPtr & xMap );
+
+ void SetGrammar( const formula::FormulaGrammar::Grammar eGrammar );
+
+ void SetEncodeUrlMode( EncodeUrlMode eMode );
+ EncodeUrlMode GetEncodeUrlMode() const;
+private:
+ /** Set grammar and reference convention from within SetFormulaLanguage()
+ or SetGrammar().
+
+ @param eNewGrammar
+ The new grammar to be set and the associated reference convention.
+
+ @param eOldGrammar
+ The previous grammar that was active before SetFormulaLanguage().
+ */
+ void SetGrammarAndRefConvention(
+ const formula::FormulaGrammar::Grammar eNewGrammar,
+ const formula::FormulaGrammar::Grammar eOldGrammar );
+public:
+
+ /// Set external link info for ScAddress::CONV_XL_OOX.
+ inline void SetExternalLinks(
+ const ::com::sun::star::uno::Sequence<
+ const ::com::sun::star::sheet::ExternalLinkInfo > & rLinks )
+ {
+ maExternalLinks = rLinks;
+ }
+
+ void CreateStringFromXMLTokenArray( String& rFormula, String& rFormulaNmsp );
+
+ void SetExtendedErrorDetection( bool bVal ) { mbExtendedErrorDetection = bVal; }
+
+ BOOL IsCorrected() { return bCorrected; }
+ const String& GetCorrectedFormula() { return aCorrectedFormula; }
+
+ // Use convention from this->aPos by default
+ ScTokenArray* CompileString( const String& rFormula );
+ ScTokenArray* CompileString( const String& rFormula, const String& rFormulaNmsp );
+ const ScDocument* GetDoc() const { return pDoc; }
+ const ScAddress& GetPos() const { return aPos; }
+
+ void MoveRelWrap( SCCOL nMaxCol, SCROW nMaxRow );
+ static void MoveRelWrap( ScTokenArray& rArr, ScDocument* pDoc, const ScAddress& rPos,
+ SCCOL nMaxCol, SCROW nMaxRow );
+
+ BOOL UpdateNameReference( UpdateRefMode eUpdateRefMode,
+ const ScRange&,
+ SCsCOL nDx, SCsROW nDy, SCsTAB nDz,
+ BOOL& rChanged, BOOL bSharedFormula = FALSE);
+
+ ScRangeData* UpdateReference( UpdateRefMode eUpdateRefMode,
+ const ScAddress& rOldPos, const ScRange&,
+ SCsCOL nDx, SCsROW nDy, SCsTAB nDz,
+ BOOL& rChanged, BOOL& rRefSizeChanged );
+
+ /// Only once for converted shared formulas,
+ /// token array has to be compiled afterwards.
+ void UpdateSharedFormulaReference( UpdateRefMode eUpdateRefMode,
+ const ScAddress& rOldPos, const ScRange&,
+ SCsCOL nDx, SCsROW nDy, SCsTAB nDz );
+
+ ScRangeData* UpdateInsertTab(SCTAB nTable, BOOL bIsName );
+ ScRangeData* UpdateDeleteTab(SCTAB nTable, BOOL bIsMove, BOOL bIsName, BOOL& bCompile);
+ ScRangeData* UpdateMoveTab(SCTAB nOldPos, SCTAB nNewPos, BOOL bIsName );
+
+ BOOL HasModifiedRange();
+
+ /** If the character is allowed as first character in sheet names or
+ references, includes '$' and '?'. */
+ static inline BOOL IsCharWordChar( String const & rStr,
+ xub_StrLen nPos,
+ const formula::FormulaGrammar::AddressConvention eConv = formula::FormulaGrammar::CONV_OOO )
+ {
+ sal_Unicode c = rStr.GetChar( nPos );
+ sal_Unicode cLast = nPos > 0 ? rStr.GetChar(nPos-1) : 0;
+ if (c < 128)
+ {
+ return pConventions[eConv] ? static_cast<BOOL>(
+ (pConventions[eConv]->getCharTableFlags(c, cLast) & SC_COMPILER_C_CHAR_WORD) == SC_COMPILER_C_CHAR_WORD) :
+ FALSE; // no convention => assume invalid
+ }
+ else
+ return ScGlobal::pCharClass->isLetterNumeric( rStr, nPos );
+ }
+
+ /** If the character is allowed in sheet names, thus may be part of a
+ reference, includes '$' and '?' and such. */
+ static inline BOOL IsWordChar( String const & rStr,
+ xub_StrLen nPos,
+ const formula::FormulaGrammar::AddressConvention eConv = formula::FormulaGrammar::CONV_OOO )
+ {
+ sal_Unicode c = rStr.GetChar( nPos );
+ sal_Unicode cLast = nPos > 0 ? rStr.GetChar(nPos-1) : 0;
+ if (c < 128)
+ {
+ return pConventions[eConv] ? static_cast<BOOL>(
+ (pConventions[eConv]->getCharTableFlags(c, cLast) & SC_COMPILER_C_WORD) == SC_COMPILER_C_WORD) :
+ FALSE; // convention not known => assume invalid
+ }
+ else
+ return ScGlobal::pCharClass->isLetterNumeric( rStr, nPos );
+ }
+
+ /** If the character is allowed as tested by nFlags (SC_COMPILER_C_...
+ bits) for all known address conventions. If more than one bit is given
+ in nFlags, all bits must match. If bTestLetterNumeric is FALSE and
+ char>=128, no LetterNumeric test is done and FALSE is returned. */
+ static inline bool IsCharFlagAllConventions( String const & rStr,
+ xub_StrLen nPos,
+ ULONG nFlags,
+ bool bTestLetterNumeric = true )
+ {
+ sal_Unicode c = rStr.GetChar( nPos );
+ sal_Unicode cLast = nPos > 0 ? rStr.GetChar( nPos-1 ) : 0;
+ if (c < 128)
+ {
+ for ( int nConv = formula::FormulaGrammar::CONV_UNSPECIFIED;
+ ++nConv < formula::FormulaGrammar::CONV_LAST; )
+ {
+ if (pConventions[nConv] &&
+ ((pConventions[nConv]->getCharTableFlags(c, cLast) & nFlags) != nFlags))
+ return false;
+ // convention not known => assume valid
+ }
+ return true;
+ }
+ else if (bTestLetterNumeric)
+ return ScGlobal::pCharClass->isLetterNumeric( rStr, nPos );
+ else
+ return false;
+ }
+
+private:
+ // FormulaCompiler
+ virtual String FindAddInFunction( const String& rUpperName, BOOL bLocalFirst ) const;
+ virtual void fillFromAddInCollectionUpperName( NonConstOpCodeMapPtr xMap ) const;
+ virtual void fillFromAddInCollectionEnglishName( NonConstOpCodeMapPtr xMap ) const;
+ virtual void fillFromAddInMap( NonConstOpCodeMapPtr xMap, formula::FormulaGrammar::Grammar _eGrammar ) const;
+ virtual void fillAddInToken(::std::vector< ::com::sun::star::sheet::FormulaOpCodeMapEntry >& _rVec,bool _bIsEnglish) const;
+
+ virtual BOOL HandleExternalReference(const formula::FormulaToken& _aToken);
+ virtual BOOL HandleRange();
+ virtual BOOL HandleSingleRef();
+ virtual BOOL HandleDbData();
+
+ virtual formula::FormulaTokenRef ExtendRangeReference( formula::FormulaToken & rTok1, formula::FormulaToken & rTok2, bool bReuseDoubleRef );
+ virtual void CreateStringFromExternal(rtl::OUStringBuffer& rBuffer, formula::FormulaToken* pTokenP);
+ virtual void CreateStringFromSingleRef(rtl::OUStringBuffer& rBuffer,formula::FormulaToken* _pTokenP);
+ virtual void CreateStringFromDoubleRef(rtl::OUStringBuffer& rBuffer,formula::FormulaToken* _pTokenP);
+ virtual void CreateStringFromMatrix( rtl::OUStringBuffer& rBuffer, formula::FormulaToken* _pTokenP);
+ virtual void CreateStringFromIndex(rtl::OUStringBuffer& rBuffer,formula::FormulaToken* _pTokenP);
+ virtual void LocalizeString( String& rName ); // modify rName - input: exact name
+ virtual BOOL IsImportingXML() const;
+
+ /// Access the CharTable flags
+ inline ULONG GetCharTableFlags( sal_Unicode c, sal_Unicode cLast )
+ { return c < 128 ? pConv->getCharTableFlags(c, cLast) : 0; }
+};
+
+SC_DLLPUBLIC String GetScCompilerNativeSymbol( OpCode eOp ); //CHINA001
+
+#endif
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */