formula.h

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// Simple mathematical formula processing library
//  Written by Atsushi Watanabe
//  Intelligent Robot Laboratory, University of Tsukuba
//
// Copyright 2011 Atsushi Watanabe, All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// * Redistributions of source code must retain the above copyright notice, this
//   list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above copyright notice,
//   this list of conditions and the following disclaimer in the documentation
//   and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR
// IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO
// EVENT SHALL THE FREEBSD PROJECT OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
// INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifndef FORMULA_H
#define FORMULA_H

#include <formula-calc.h>

struct stack_t
{
  int rank;
  enum rpf_type_t type;
  void *value;
};

struct operation_t
{
  char op[8];
  int rank;
  enum rpf_type_t type;
  double (*func)(double **);
  int narg;
};

struct rpf_t *rpf_push(struct rpf_t *rpf, struct stack_t *obj);
struct rpf_t *rpf_join(struct rpf_t *rpf, struct rpf_t *rpf2);
int rpf_count_num(struct rpf_t *rpf);
struct rpf_t *rpf_last(struct rpf_t *rpf);
struct rpf_t *formula_output(struct stack_t *num, int *sp_num, struct stack_t *op, int *sp_op, int rank);

#endif  // FORMULA_H