318 lines
12 KiB
C
318 lines
12 KiB
C
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/*
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__________
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_____ __ __\______ \_____ _______ ______ ____ _______
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/ \ | | \| ___/\__ \ \_ __ \/ ___/_/ __ \\_ __ \
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| Y Y \| | /| | / __ \_| | \/\___ \ \ ___/ | | \/
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|__|_| /|____/ |____| (____ /|__| /____ > \___ >|__|
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\/ \/ \/ \/
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Copyright (C) 2013 Ingo Berg
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Permission is hereby granted, free of charge, to any person obtaining a copy of this
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software and associated documentation files (the "Software"), to deal in the Software
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without restriction, including without limitation the rights to use, copy, modify,
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merge, publish, distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all copies or
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substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT
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NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*/
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#ifndef MU_PARSER_BASE_H
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#define MU_PARSER_BASE_H
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//--- Standard includes ------------------------------------------------------------------------
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#include <cmath>
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#include <string>
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#include <iostream>
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#include <map>
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#include <memory>
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#include <locale>
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#include <limits.h>
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//--- Parser includes --------------------------------------------------------------------------
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#include "muParserDef.h"
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#include "muParserStack.h"
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#include "muParserTokenReader.h"
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#include "muParserBytecode.h"
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#include "muParserError.h"
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namespace mu
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{
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/** \file
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\brief This file contains the class definition of the muparser engine.
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*/
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//--------------------------------------------------------------------------------------------------
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/** \brief Mathematical expressions parser (base parser engine).
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\author (C) 2013 Ingo Berg
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This is the implementation of a bytecode based mathematical expressions parser.
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The formula will be parsed from string and converted into a bytecode.
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Future calculations will be done with the bytecode instead the formula string
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resulting in a significant performance increase.
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Complementary to a set of internally implemented functions the parser is able to handle
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user defined functions and variables.
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*/
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class ParserBase
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{
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friend class ParserTokenReader;
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private:
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/** \brief Typedef for the parse functions.
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The parse function do the actual work. The parser exchanges
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the function pointer to the parser function depending on
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which state it is in. (i.e. bytecode parser vs. string parser)
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*/
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typedef value_type (ParserBase::*ParseFunction)() const;
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/** \brief Type used for storing an array of values. */
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typedef std::vector<value_type> valbuf_type;
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/** \brief Type for a vector of strings. */
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typedef std::vector<string_type> stringbuf_type;
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/** \brief Typedef for the token reader. */
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typedef ParserTokenReader token_reader_type;
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/** \brief Type used for parser tokens. */
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typedef ParserToken<value_type, string_type> token_type;
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/** \brief Maximum number of threads spawned by OpenMP when using the bulk mode. */
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static const int s_MaxNumOpenMPThreads = 16;
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public:
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/** \brief Type of the error class.
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Included for backwards compatibility.
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*/
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typedef ParserError exception_type;
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static void EnableDebugDump(bool bDumpCmd, bool bDumpStack);
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ParserBase();
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ParserBase(const ParserBase &a_Parser);
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ParserBase& operator=(const ParserBase &a_Parser);
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virtual ~ParserBase();
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value_type Eval() const;
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value_type* Eval(int &nStackSize) const;
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void Eval(value_type *results, int nBulkSize);
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int GetNumResults() const;
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void SetExpr(const string_type &a_sExpr);
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void SetVarFactory(facfun_type a_pFactory, void *pUserData = NULL);
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void SetDecSep(char_type cDecSep);
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void SetThousandsSep(char_type cThousandsSep = 0);
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void ResetLocale();
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void EnableOptimizer(bool a_bIsOn=true);
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void EnableBuiltInOprt(bool a_bIsOn=true);
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bool HasBuiltInOprt() const;
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void AddValIdent(identfun_type a_pCallback);
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/** \fn void mu::ParserBase::DefineFun(const string_type &a_strName, fun_type0 a_pFun, bool a_bAllowOpt = true)
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\brief Define a parser function without arguments.
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\param a_strName Name of the function
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\param a_pFun Pointer to the callback function
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\param a_bAllowOpt A flag indicating this function may be optimized
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*/
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template<typename T>
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void DefineFun(const string_type &a_strName, T a_pFun, bool a_bAllowOpt = true)
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{
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AddCallback( a_strName, ParserCallback(a_pFun, a_bAllowOpt), m_FunDef, ValidNameChars() );
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}
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void DefineOprt(const string_type &a_strName,
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fun_type2 a_pFun,
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unsigned a_iPri=0,
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EOprtAssociativity a_eAssociativity = oaLEFT,
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bool a_bAllowOpt = false);
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void DefineConst(const string_type &a_sName, value_type a_fVal);
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void DefineStrConst(const string_type &a_sName, const string_type &a_strVal);
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void DefineVar(const string_type &a_sName, value_type *a_fVar);
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void DefinePostfixOprt(const string_type &a_strFun, fun_type1 a_pOprt, bool a_bAllowOpt=true);
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void DefineInfixOprt(const string_type &a_strName, fun_type1 a_pOprt, int a_iPrec=prINFIX, bool a_bAllowOpt=true);
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// Clear user defined variables, constants or functions
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void ClearVar();
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void ClearFun();
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void ClearConst();
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void ClearInfixOprt();
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void ClearPostfixOprt();
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void ClearOprt();
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void RemoveVar(const string_type &a_strVarName);
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const varmap_type& GetUsedVar() const;
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const varmap_type& GetVar() const;
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const valmap_type& GetConst() const;
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const string_type& GetExpr() const;
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const funmap_type& GetFunDef() const;
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string_type GetVersion(EParserVersionInfo eInfo = pviFULL) const;
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const char_type ** GetOprtDef() const;
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void DefineNameChars(const char_type *a_szCharset);
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void DefineOprtChars(const char_type *a_szCharset);
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void DefineInfixOprtChars(const char_type *a_szCharset);
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const char_type* ValidNameChars() const;
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const char_type* ValidOprtChars() const;
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const char_type* ValidInfixOprtChars() const;
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void SetArgSep(char_type cArgSep);
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char_type GetArgSep() const;
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void Error(EErrorCodes a_iErrc,
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int a_iPos = (int)mu::string_type::npos,
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const string_type &a_strTok = string_type() ) const;
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protected:
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void Init();
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virtual void InitCharSets() = 0;
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virtual void InitFun() = 0;
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virtual void InitConst() = 0;
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virtual void InitOprt() = 0;
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virtual void OnDetectVar(string_type *pExpr, int &nStart, int &nEnd);
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static const char_type *c_DefaultOprt[];
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static std::locale s_locale; ///< The locale used by the parser
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static bool g_DbgDumpCmdCode;
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static bool g_DbgDumpStack;
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/** \brief A facet class used to change decimal and thousands separator. */
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template<class TChar>
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class change_dec_sep : public std::numpunct<TChar>
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{
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public:
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explicit change_dec_sep(char_type cDecSep, char_type cThousandsSep = 0, int nGroup = 3)
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:std::numpunct<TChar>()
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,m_nGroup(nGroup)
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,m_cDecPoint(cDecSep)
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,m_cThousandsSep(cThousandsSep)
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{}
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protected:
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virtual char_type do_decimal_point() const
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{
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return m_cDecPoint;
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}
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virtual char_type do_thousands_sep() const
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{
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return m_cThousandsSep;
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}
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virtual std::string do_grouping() const
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{
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// fix for issue 4: https://code.google.com/p/muparser/issues/detail?id=4
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// courtesy of Jens Bartsch
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// original code:
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// return std::string(1, (char)m_nGroup);
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// new code:
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return std::string(1, (char)(m_cThousandsSep > 0 ? m_nGroup : CHAR_MAX));
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}
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private:
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int m_nGroup;
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char_type m_cDecPoint;
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char_type m_cThousandsSep;
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};
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private:
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void Assign(const ParserBase &a_Parser);
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void InitTokenReader();
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void ReInit() const;
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void AddCallback( const string_type &a_strName,
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const ParserCallback &a_Callback,
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funmap_type &a_Storage,
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const char_type *a_szCharSet );
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void ApplyRemainingOprt(ParserStack<token_type> &a_stOpt,
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ParserStack<token_type> &a_stVal) const;
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void ApplyBinOprt(ParserStack<token_type> &a_stOpt,
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ParserStack<token_type> &a_stVal) const;
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void ApplyIfElse(ParserStack<token_type> &a_stOpt,
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ParserStack<token_type> &a_stVal) const;
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void ApplyFunc(ParserStack<token_type> &a_stOpt,
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ParserStack<token_type> &a_stVal,
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int iArgCount) const;
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token_type ApplyStrFunc(const token_type &a_FunTok,
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const std::vector<token_type> &a_vArg) const;
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int GetOprtPrecedence(const token_type &a_Tok) const;
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EOprtAssociativity GetOprtAssociativity(const token_type &a_Tok) const;
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void CreateRPN() const;
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value_type ParseString() const;
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value_type ParseCmdCode() const;
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value_type ParseCmdCodeBulk(int nOffset, int nThreadID) const;
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void CheckName(const string_type &a_strName, const string_type &a_CharSet) const;
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void CheckOprt(const string_type &a_sName,
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const ParserCallback &a_Callback,
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const string_type &a_szCharSet) const;
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void StackDump(const ParserStack<token_type > &a_stVal,
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const ParserStack<token_type > &a_stOprt) const;
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/** \brief Pointer to the parser function.
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Eval() calls the function whose address is stored there.
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*/
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mutable ParseFunction m_pParseFormula;
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mutable ParserByteCode m_vRPN; ///< The Bytecode class.
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mutable stringbuf_type m_vStringBuf; ///< String buffer, used for storing string function arguments
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stringbuf_type m_vStringVarBuf;
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std::auto_ptr<token_reader_type> m_pTokenReader; ///< Managed pointer to the token reader object.
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funmap_type m_FunDef; ///< Map of function names and pointers.
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funmap_type m_PostOprtDef; ///< Postfix operator callbacks
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funmap_type m_InfixOprtDef; ///< unary infix operator.
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funmap_type m_OprtDef; ///< Binary operator callbacks
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valmap_type m_ConstDef; ///< user constants.
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strmap_type m_StrVarDef; ///< user defined string constants
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varmap_type m_VarDef; ///< user defind variables.
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bool m_bBuiltInOp; ///< Flag that can be used for switching built in operators on and off
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string_type m_sNameChars; ///< Charset for names
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string_type m_sOprtChars; ///< Charset for postfix/ binary operator tokens
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string_type m_sInfixOprtChars; ///< Charset for infix operator tokens
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mutable int m_nIfElseCounter; ///< Internal counter for keeping track of nested if-then-else clauses
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// items merely used for caching state information
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mutable valbuf_type m_vStackBuffer; ///< This is merely a buffer used for the stack in the cmd parsing routine
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mutable int m_nFinalResultIdx;
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};
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} // namespace mu
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#endif
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