revert commits improved performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)
Following commits are reverted:
mjsousa 0b275a2 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- increase hardcoded limit to 499
mjsousa 2228799 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- Add comments!!
mjsousa ce81fa6 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)"
The reason is that they cause regression in some cases (if function is
used as argument for function block, for example) and this is not
fixed for a long time.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt)
* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
*
* This program 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.
*
* This program 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 this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
/*
* An IEC 61131-3 compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/* Decomposes a variable instance name into its constituents,
* example:
* window.points[1].coordinate.x
*
* will succesfully return
* - window
* - points
* - coordinate
* - x
* on succesive calls to decompose_var_instance_name_c::next_part()
*/
#include "../absyntax/visitor.hh"
class decompose_var_instance_name_c: null_visitor_c {
public:
/***********************************/
/* B 1.2 - Operators */
/***********************************/
static identifier_c LD_operator_name;
static identifier_c S_operator_name;
static identifier_c R_operator_name;
static identifier_c S1_operator_name;
static identifier_c R1_operator_name;
static identifier_c CLK_operator_name;
static identifier_c CU_operator_name;
static identifier_c CD_operator_name;
static identifier_c PV_operator_name;
static identifier_c IN_operator_name;
static identifier_c PT_operator_name;
private:
symbol_c *variable_name;
symbol_c *next_variable_name;
symbol_c *current_recursive_variable_name;
symbol_c *previously_returned_variable_name;
list_c *current_array_subscript_list;
public:
decompose_var_instance_name_c(symbol_c *variable_instance_name);
/* Get the next element in the strcutured variable */
symbol_c *get_next(void);
/* If the current element in the structured variable is an array, return its subscript_list, otherwise return NULL */
list_c *get_current_arraysubs_list(void);
private:
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *symbol);
/*********************/
/* B 1.4 - Variables */
/*********************/
void *visit(symbolic_variable_c *symbol);
/********************************************/
/* B.1.4.1 Directly Represented Variables */
/********************************************/
void *visit(direct_variable_c *symbol);
/*************************************/
/* B.1.4.2 Multi-element Variables */
/*************************************/
/* subscripted_variable '[' subscript_list ']' */
// SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
void *visit(array_variable_c *symbol);
/* record_variable '.' field_selector */
/* WARNING: input and/or output variables of function blocks
* may be accessed as fields of a tructured variable!
* Code handling a structured_variable_c must take
* this into account!
*/
//SYM_REF2(structured_variable_c, record_variable, field_selector)
void *visit(structured_variable_c *symbol);
/********************************/
/* B 2.2 - Operators */
/********************************/
void *visit(LD_operator_c *symbol);
void *visit(S_operator_c *symbol);
void *visit(R_operator_c *symbol);
void *visit(S1_operator_c *symbol);
void *visit(R1_operator_c *symbol);
void *visit(CLK_operator_c *symbol);
void *visit(CU_operator_c *symbol);
void *visit(CD_operator_c *symbol);
void *visit(PV_operator_c *symbol);
void *visit(IN_operator_c *symbol);
void *visit(PT_operator_c *symbol);
}; // decompose_var_instance_name_c