120 lines
2.6 KiB
C
120 lines
2.6 KiB
C
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/*********************************************************************
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*
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* <EFBFBD><EFBFBD> <EFBFBD><EFBFBD>: FileZone.h
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*
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* <EFBFBD><EFBFBD>Ȩ<EFBFBD><EFBFBD><EFBFBD><EFBFBD>: Shanghai Baosight Software Co., Ltd.
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*
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*********************************************************************/
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#ifndef _H_FileZone_H
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#define _H_FileZone_H
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#include <vector>
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#include <dirent.h>
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#include <stdarg.h>
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#ifdef _WIN32
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#include <Winsock2.h>
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#include <string>
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#include <cmath>
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#else
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#include <sys/stat.h>
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#include <zlib/MemTrk.h>
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#include <cmath>
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#include <string>
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#include <stack>
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#endif
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using namespace baosight;
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const int PRI_A[] = { 5, 5, 7, 7, 7, 1, 8, 8, 7,/* 7, 7, 7,*/ 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 7, 4, 3, 0 };
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const int PRI_B[] = { 4, 4, 6, 6, 6, 10, 1, 1, 8,/* 8, 8, 8,*/ 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 8, 3, 2, 0 };
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class CCalculator
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{
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public:
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struct Symbol
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{
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enum SYMTYPE {
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NUMBER,
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OPERATOR
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} type;
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enum OPTYPE
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{
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ADD, // +
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SUBSTRACT, // -
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MULTIPLY, // *
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DIVIDE, // /
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MOD, // %
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LEFTBRACE, // (
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RIGHTBRACE, // )
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COMMA, // ,
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ABS, // ||
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/*
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ACOS, //acos
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ASIN, //asin
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ATAN, //atan
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*/
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CEIL, // ȡ<><C8A1>
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COS, // cos
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EXP, // e^
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FLOOR, //floor
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HYPOT, // tangle
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LN, // ln
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LOG10, // lg
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POW, // x^y
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ROUND, //round
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SIN, // sin
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SQRT, // ƽ<><C6BD><EFBFBD><EFBFBD>
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TAN, //tan
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AND, // &
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OR, // |
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STACKEND,
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};
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union
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{
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OPTYPE opType;
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double number;
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} content;
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};
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public:
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CCalculator(void);
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~CCalculator(void);
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CCalculator(const string &str);
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// set expression
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void SetExp(const string &str);
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// do calculation
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bool Calc(double &);
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private:
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string m_strExp;
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int m_curIndex;
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// stack to hold number and operator
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stack<Symbol> stkNum, stkOpt;
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bool DoCalcOfOpt(Symbol &sym);
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protected:
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// this is a Parser
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// return value:
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// 1, correct
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// 0, symbol wrong
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// -1, end of string
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// -2, string is null
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int GetNextSymbol(Symbol &sym);
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// get next character
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bool GetNextChar(char &ch);
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// peek adjacent character
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bool PeekChar(char &ch, bool bPrevious);
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// return priority of sym inside stack
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int PriA(Symbol &sym)
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{
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if (sym.type == Symbol::OPERATOR)
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return PRI_A[(int)sym.content.opType];
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return -1;
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};
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// return priority of sym outside stack
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int PriB(Symbol &sym)
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{
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if (sym.type == Symbol::OPERATOR)
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return PRI_B[(int)sym.content.opType];
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return -1;
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};
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};
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#endif
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