/* Copyright 2021 FXcoder This file is part of VPSimple. VPSimple is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. VPSimple 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 General Public License for more details. You should have received a copy of the GNU General Public License along with VPSimple. If not, see http://www.gnu.org/licenses/. */ // Функции символа (инструмента). © FXcoder #property strict #include "../type/uncopyable.mqh" #include "str.mqh" class CBSymbolUtil: public CBUncopyable { public: static const string current; public: static bool is_current(string symbol) { return(real(symbol) == _sym.current); } // selected_only - искать только в выбранных (в обзоре рынка) //tested: 4.1170 static bool exists(string symbol, bool selected_only = false) { #ifdef __MQL4__ // Если свойство успешно считано, символ существет // проверка на ERR_MARKET_NOT_SELECTED здесь не нужна, т.к. код ниже её игнорирует (5.2007) long tmp; if (!::SymbolInfoInteger(symbol, SYMBOL_DIGITS, tmp)) return(false); #else if (!(bool)::SymbolInfoInteger(symbol, SYMBOL_EXIST)) return(false); #endif return(!selected_only || (bool)::SymbolInfoInteger(symbol, SYMBOL_SELECT)); } // return current symbol if `symbol` does not exist static bool validate_input(string &symbol) { if (_sym.is_current(symbol)) { symbol = _sym.current; return(true); } if (_sym.exists(symbol)) return(true); if (_sym.exists(_str.upper(symbol))) { symbol = _str.upper(symbol); return(true); } return(false); } // return current if empy static string real(string symbol) { return(_str.is_empty(symbol) ? _Symbol : symbol); } }; const string CBSymbolUtil::current = Symbol(); CBSymbolUtil _sym;