Fix __dt_to_timespec primitive function.
Set tm_isdst = 0 to disable DayLight Savig Time.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2003-2012 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)
*
*/
/* Determine the data type of a variable.
* The variable may be a simple variable, a function block instance, a
* struture element within a data structured type (a struct or a fb), or
* an array element.
* A mixture of array element of a structure element of a structure element
* of a .... is also suported!
*
* example:
* window.points[1].coordinate.x
* window.points[1].colour
* etc... ARE ALLOWED!
*
* This class must be passed the scope within which the
* variable was declared, and the variable name...
*
*
*
*
*
* This class has several members, depending on the exact data the caller
* is looking for...
*
* - item i: we can get either the name of the data type(A),
* or it's declaration (B)
* (notice however that some variables belong to a data type that does
* not have a name, only a declaration as in
* VAR a: ARRAY [1..3] of INT; END_VAR
* )
* - item ii: we can get either the direct data type (1),
* or the base type (2)
*
* By direct type, I mean the data type of the variable. By base type, I
* mean the data type on which the direct type is based on. For example, in
* a subrange on INT, the direct type is the subrange itself, while the
* base type is INT.
* e.g.
* This means that if we find that the variable is of type MY_INT,
* which was previously declared to be
* TYPE MY_INT: INT := 9;
* option (1) will return MY_INT
* option (2) will return INT
*
*
* Member functions:
* ================
* get_basetype_id() ---> returns 2A (implemented, although currently it is not needed! )
* get_basetype_decl() ---> returns 2B
* get_type_id() ---> returns 1A
*
* Since we haven't yet needed it, we don't yet implement
* get_type_decl() ---> returns 1B
*/
class search_varfb_instance_type_c : null_visitor_c {
private:
search_var_instance_decl_c search_var_instance_decl;
search_base_type_c search_base_type;
// symbol_c *current_type_decl;
symbol_c *current_type_id;
symbol_c *current_basetype_decl;
symbol_c *current_basetype_id;
symbol_c *current_field_selector;
bool is_complex;
/* sets all the above variables to NULL, or false */
void init(void);
public:
search_varfb_instance_type_c(symbol_c *search_scope );
symbol_c *get_basetype_decl (symbol_c *variable_name);
symbol_c *get_basetype_id (symbol_c *variable_name);
// symbol_c *get_type_decl (symbol_c *variable_name);
symbol_c *get_type_id (symbol_c *variable_name);
private:
/* a helper function... */
void *visit_list(list_c *list);
/* a helper function... */
void *base_type(symbol_c *symbol);
private:
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *variable_name);
/********************************/
/* B 1.3.3 - Derived data types */
/********************************/
/* identifier ':' array_spec_init */
void *visit(array_type_declaration_c *symbol);
/* array_specification [ASSIGN array_initialization} */
/* array_initialization may be NULL ! */
void *visit(array_spec_init_c *symbol);
/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */
void *visit(array_specification_c *symbol);
/* structure_type_name ':' structure_specification */
void *visit(structure_type_declaration_c *symbol);
/* structure_type_name ASSIGN structure_initialization */
/* structure_initialization may be NULL ! */
// SYM_REF2(initialized_structure_c, structure_type_name, structure_initialization)
void *visit(initialized_structure_c *symbol);
/* helper symbol for structure_declaration */
/* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */
/* structure_element_declaration_list structure_element_declaration ';' */
void *visit(structure_element_declaration_list_c *symbol);
/* structure_element_name ':' spec_init */
void *visit(structure_element_declaration_c *symbol);
/* helper symbol for structure_initialization */
/* structure_initialization: '(' structure_element_initialization_list ')' */
/* structure_element_initialization_list ',' structure_element_initialization */
void *visit(structure_element_initialization_list_c *symbol); /* should never get called... */
/* structure_element_name ASSIGN value */
void *visit(structure_element_initialization_c *symbol); /* should never get called... */
/*********************/
/* B 1.4 - Variables */
/*********************/
void *visit(symbolic_variable_c *symbol);
/********************************************/
/* B.1.4.1 Directly Represented Variables */
/********************************************/
/*************************************/
/* B 1.4.2 - Multi-element variables */
/*************************************/
void *visit(array_variable_c *symbol);
void *visit(structured_variable_c *symbol);
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
// SYM_REF4(function_block_declaration_c, fblock_name, var_declarations, fblock_body, unused)
void *visit(function_block_declaration_c *symbol);
}; // search_varfb_instance_type_c