Fixed bug in DATE_AND_TIME_TO_TIME_OF_DAY and DATE_AND_TIME_TO_DATE when date and time is before 1970-01-01-00:00:00
/*
* 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 "decompose_var_instance_name.hh"
decompose_var_instance_name_c::decompose_var_instance_name_c(symbol_c *variable_instance_name) {
variable_name = variable_instance_name;
next_variable_name = NULL;
current_recursive_variable_name = NULL;
previously_returned_variable_name = NULL;
}
symbol_c *decompose_var_instance_name_c::next_part(bool increment) {
/* We must always start from the top!
* See note in the structured_variable_c visitor
* to understand why...
*/
symbol_c *res = (symbol_c *)variable_name->accept(*this);
if (increment)
next_variable_name = current_recursive_variable_name;
if (previously_returned_variable_name == res)
return NULL;
if (increment)
previously_returned_variable_name = res;
return res;
}
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
/* sometimes (e.g. FB calls) the name of the variable is stored directly in an identifier_c object */
void *decompose_var_instance_name_c::visit(identifier_c *symbol) {return (void *)symbol;}
/*********************/
/* B 1.4 - Variables */
/*********************/
void *decompose_var_instance_name_c::visit(symbolic_variable_c *symbol) {return (void *)(symbol->var_name);}
/********************************************/
/* B.1.4.1 Directly Represented Variables */
/********************************************/
void *decompose_var_instance_name_c::visit(direct_variable_c *symbol) {return (void *)symbol;}
/*************************************/
/* B.1.4.2 Multi-element Variables */
/*************************************/
/* subscripted_variable '[' subscript_list ']' */
// SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
void *decompose_var_instance_name_c::visit(array_variable_c *symbol) {
/* NOTE: the subscripted_variable may itself be a structure!,
* so we must recursevily visit!
*/
return symbol->subscripted_variable->accept(*this);
}
/* 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 *decompose_var_instance_name_c::visit(structured_variable_c *symbol) {
/* NOTE: The following code will not work, as structured_variable_c
* are grouped on the left, and not on the right!
*
* example: window.origin.x
* will result in
* s1 = structured_variable_c("window, "origin");
* s2 = structured_variable_c(s1, "x");
* AND NOT
* s1 = structured_variable_c("origin", "x");
* s2 = structured_variable_c("window", s1);
*
* as the following code assumes!!
*
current_variable_name = symbol->field_selector;
return symbol->record_variable->accept(*this);
*/
/* The correct code, is therefore more complex... */
if (next_variable_name == symbol) {
return (void *)symbol->field_selector->accept(*this);
}
current_recursive_variable_name = symbol;
return symbol->record_variable->accept(*this);
}
/********************************/
/* B 2.2 - Operators */
/********************************/
void *decompose_var_instance_name_c::visit(LD_operator_c *symbol) {return (void *)&LD_operator_name;}
void *decompose_var_instance_name_c::visit(S_operator_c *symbol) {return (void *)&S_operator_name;}
void *decompose_var_instance_name_c::visit(R_operator_c *symbol) {return (void *)&R_operator_name;}
void *decompose_var_instance_name_c::visit(S1_operator_c *symbol) {return (void *)&S1_operator_name;}
void *decompose_var_instance_name_c::visit(R1_operator_c *symbol) {return (void *)&R1_operator_name;}
void *decompose_var_instance_name_c::visit(CLK_operator_c *symbol) {return (void *)&CLK_operator_name;}
void *decompose_var_instance_name_c::visit(CU_operator_c *symbol) {return (void *)&CU_operator_name;}
void *decompose_var_instance_name_c::visit(CD_operator_c *symbol) {return (void *)&CD_operator_name;}
void *decompose_var_instance_name_c::visit(PV_operator_c *symbol) {return (void *)&PV_operator_name;}
void *decompose_var_instance_name_c::visit(IN_operator_c *symbol) {return (void *)&IN_operator_name;}
void *decompose_var_instance_name_c::visit(PT_operator_c *symbol) {return (void *)&PT_operator_name;}
identifier_c decompose_var_instance_name_c::LD_operator_name("LD");
identifier_c decompose_var_instance_name_c::S_operator_name("S");
identifier_c decompose_var_instance_name_c::R_operator_name("R");
identifier_c decompose_var_instance_name_c::S1_operator_name("S1");
identifier_c decompose_var_instance_name_c::R1_operator_name("R1");
identifier_c decompose_var_instance_name_c::CLK_operator_name("CLK");
identifier_c decompose_var_instance_name_c::CU_operator_name("CU");
identifier_c decompose_var_instance_name_c::CD_operator_name("CD");
identifier_c decompose_var_instance_name_c::PV_operator_name("PV");
identifier_c decompose_var_instance_name_c::IN_operator_name("IN");
identifier_c decompose_var_instance_name_c::PT_operator_name("PT");