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/**
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* @file ops.h
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* Provides arithematic operators to the parser
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*
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* Copyright (C) 2018 Clyne Sullivan
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef OPS_H_
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#define OPS_H_
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#include "variable.h"
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/**
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* Defines the number of available operators.
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*/
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#define OPS_COUNT 20
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#define OP_MAGIC 0xCAFE3900
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typedef int (*opfunc_t)(variable **, variable *, variable *);
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/**
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* An array of variable objects for each operator, exposed for the parser.
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*/
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extern variable opvars[];
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/**
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* An array of operator names, exposed for the parser.
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*/
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extern const char *opnames[];
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/**
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* Gets the variable for the given operator.
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* @param name the operator (e.g. "+")
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* @param retlen if not null, stores the operator string's length here
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* @return variable for the operator, zero if not found
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*/
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variable *igetop(const char *name, int *retlen);
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#endif // OPS_H_
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