Calculator.h revision 10448:bc1a3b7ab5ef
1/* Copyright (c) 2012 Massachusetts Institute of Technology 2 * 3 * Permission is hereby granted, free of charge, to any person obtaining a copy 4 * of this software and associated documentation files (the "Software"), to deal 5 * in the Software without restriction, including without limitation the rights 6 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell 7 * copies of the Software, and to permit persons to whom the Software is 8 * furnished to do so, subject to the following conditions: 9 * 10 * The above copyright notice and this permission notice shall be included in 11 * all copies or substantial portions of the Software. 12 * 13 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 14 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 15 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE 16 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER 17 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, 18 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN 19 * THE SOFTWARE. 20 */ 21 22#ifndef __LIBUTIL_CALCULATOR_H__ 23#define __LIBUTIL_CALCULATOR_H__ 24 25#include <sstream> 26 27#include "model/Model.h" 28#include "String.h" 29#include "Map.h" 30#include "Assert.h" 31 32namespace LibUtil 33{ 34 using std::istringstream; 35 using std::ostringstream; 36 37 /* 38 * program: 39 * END // END is end-of-input 40 * expr_list END 41 * 42 * expr_list: 43 * expression SEP expr_list // SEP is semicolon 44 * expression 45 * print expression 46 * print STRING 47 * print STRING expression 48 * print STRING expression SEP expr_list 49 * 50 * 51 * expression: 52 * expression + term 53 * expression - term 54 * term 55 * 56 * term: 57 * term / primary 58 * term * primary 59 * primary 60 * 61 * primary: 62 * NUMBER 63 * NAME 64 * NAME = expression 65 * NAME string expression // NAME is print 66 * - primary 67 * ( expression ) 68 * 69 * string: 70 * 71 **/ 72 73 class Calculator 74 { 75 protected: 76 enum Token 77 { 78 NAME, NAME2, NUMBER, STRING, END, 79 PLUS = '+', MINUS = '-', MUL = '*', DIV = '/', 80 SEP = ';', ASSIGN = '=', LP = '(', RP = ')' 81 }; 82 83 public: 84 Calculator(); 85 virtual ~Calculator(); 86 87 public: 88 void reset(); 89 void evaluateString(const String& str_, 90 const std::map<String, String> &config, 91 DSENT::Model *ms_model, 92 std::map<std::string, double> &outputs); 93 94 protected: 95 Token getToken(istringstream& ist_); 96 97 double prim(istringstream& ist_, bool is_get_, 98 const std::map<String, String> &config, 99 DSENT::Model *ms_model); 100 101 double term(istringstream& ist_, bool is_get_, 102 const std::map<String, String> &config, 103 DSENT::Model *ms_model); 104 105 double expr(istringstream& ist_, bool is_get_, 106 const std::map<String, String> &config, 107 DSENT::Model *ms_model); 108 109 virtual double getEnvVar( 110 const String& var_name_, 111 const std::map<String, String> &config, 112 DSENT::Model *ms_model) const; 113 114 protected: 115 String m_reserved_chars_; 116 Map<double> m_var_; 117 118 Token m_curr_token_; 119 double m_value_number_; 120 String m_value_string_; 121 }; 122} // namespace LibUtil 123 124#endif // __LIBUTIL_CALCULATOR_H__ 125 126