/*
* (c) 2003 Mario de Sousa
*
* Offered to the public under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2 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.
*
* 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 IL and ST compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/*
* This is one of the versions available for the 4th stage.
*
* This 4th stage generates a c++ source program equivalent
* to the IL and ST code.
*/
// #include <stdio.h> /* required for NULL */
#include <string>
#include <iostream>
#include <sstream>
#include <typeinfo>
#include "../../util/symtable.hh"
#include "../../util/dsymtable.hh"
#include "../../absyntax/visitor.hh"
#include "../stage4.hh"
//#define DEBUG
#ifdef DEBUG
#define TRACE(classname) printf("\n____%s____\n",classname);
#else
#define TRACE(classname)
#endif
#define ERROR error_exit(__FILE__,__LINE__)
/* function defined in main.cc */
extern void error_exit(const char *file_name, int line_no);
/* A symbol table with all globally declared functions... */
function_declaration_c null_symbol1(NULL,NULL,NULL,NULL);
dsymtable_c<function_declaration_c *, &null_symbol1> function_symtable;
/* A symbol table with all globally declared functions block types... */
function_block_declaration_c null_symbol2(NULL,NULL,NULL);
symtable_c<function_block_declaration_c *, &null_symbol2> function_block_type_symtable;
/* A symbol table with all globally declared program types... */
program_declaration_c null_symbol3(NULL,NULL,NULL);
symtable_c<program_declaration_c *, &null_symbol3> program_type_symtable;
/* A symbol table with all user declared type definitions... */
/* Note that function block types and program types have their
* own symbol tables, so do not get placed in this symbol table!
*/
symbol_c null_symbol4;
symtable_c<symbol_c *, &null_symbol4> type_symtable;
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* returns 0 if the names are equal!! */
/* NOTE: it must ignore case!! */
static int compare_identifiers(symbol_c *ident1, symbol_c *ident2) {
token_c *name1 = dynamic_cast<token_c *>(ident1);
token_c *name2 = dynamic_cast<token_c *>(ident2);
if ((name1 == NULL) || (name2 == NULL))
/* invalid identifiers... */
return -1;
if (strcasecmp(name1->value, name2->value) == 0)
return 0;
/* identifiers do not match! */
return 1;
}
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* Unlike Programs and Configurations which get mapped onto C++ classes,
* Function Blocks are mapped onto a C structure containing the variables, and
* a C function containing the code in the FB's body. This is to allow direct allocation
* of a FB variable (which is really an instance of the C data structure) to
* a member of a union variable (note that classes with constructors cannot
* be mebers of a union), which is done in IL when loading a FB onto IL's
* default variable.
*
* So as not to clash the names of the C data structure and the C function,
* the C structure is given a name identical to that of the FB name, whereas
* the name of the function is the FB name with a constant string appended.
* The value of that constant string which is appended is defined in the following
* constant.
* In order not to clash with any variable in the IL and ST source codem the
* following constant should contain a double underscore, which is not allowed
* in IL and ST.
*
* e.g.: FUNTION_BLOCK TEST
* is mapped onto a TEST data structure, and a TEST_body__ function.
*/
#define FB_FUNCTION_SUFFIX "_body__"
/* Idem as body, but for initializer FB function */
#define FB_INIT_SUFFIX "_init__"
/* Idem as body, but for run CONFIG and RESOURCE function */
#define FB_RUN_SUFFIX "_run__"
/* The FB body function is passed as the only parameter a pointer to the FB data
* structure instance. The name of this parameter is given by the following constant.
* In order not to clash with any variable in the IL and ST source codem the
* following constant should contain a double underscore, which is not allowed
* in IL and ST.
*
* e.g.: the body of FUNTION_BLOCK TEST
* is mapped onto the C function
* TEST_body__(TEST *data__)
*/
#define FB_FUNCTION_PARAM "data__"
#define SFC_STEP_ACTION_PREFIX "__SFC_"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#include "spec_init_separator.cc"
#include "function_param_iterator.cc"
#include "function_call_iterator.cc"
#include "function_call_param_iterator.cc"
#include "type_initial_value.cc"
#include "search_fb_instance_decl.cc"
#include "search_base_type.cc"
#include "search_var_instance_decl.cc"
#include "decompose_var_instance_name.cc"
#include "search_varfb_instance_type.cc"
#include "search_constant_type.cc"
#include "search_expression_type.cc"
#include "generate_c_base.cc"
#include "generate_c_typedecl.cc"
#include "generate_c_sfcdecl.cc"
#include "generate_c_vardecl.cc"
#include "generate_c_configbody.cc"
#include "generate_location_list.cc"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* Generate a name for a temporary variable.
* Each new name generated is appended a different number,
* starting off from 0.
* After calling reset(), the names will start off again from 0.
*/
#define VAR_LEADER "__"
#define TEMP_VAR VAR_LEADER "TMP_"
#define SOURCE_VAR VAR_LEADER "SRC_"
#include "generate_c_tempvardecl.cc"
#include "generate_c_st.cc"
#include "generate_c_il.cc"
#include "generate_c.hh"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#define MILLISECOND 1000000
#define SECOND 1000 * MILLISECOND
/* A helper class that knows how to generate code for both the IL and ST languages... */
class calculate_time_c: public iterator_visitor_c {
private:
unsigned long time;
float current_value;
public:
calculate_time_c(void){time = 0;};
unsigned long get_time(void) {return time;};
void *get_integer_value(token_c *token) {
std::string str = "";
for (unsigned int i = 0; i < strlen(token->value); i++)
if (token->value[i] != '_')
str += token->value[i];
current_value = atof(str.c_str());
return NULL;
}
void *get_float_value(token_c *token) {
current_value = atof(token->value);
return NULL;
}
/******************************/
/* B 1.2.1 - Numeric Literals */
/******************************/
void *visit(integer_c *symbol) {return get_integer_value(symbol);}
/************************/
/* B 1.2.3.1 - Duration */
/************************/
/* SYM_REF2(duration_c, neg, interval) */
void *visit(duration_c *symbol) {
if (symbol->neg != NULL)
ERROR;
symbol->interval->accept(*this);
return NULL;
}
/* SYM_TOKEN(fixed_point_c) */
void *visit(fixed_point_c *symbol) {return get_float_value(symbol);}
/* SYM_REF2(days_c, days, hours) */
void *visit(days_c *symbol) {
if (symbol->hours)
symbol->hours->accept(*this);
symbol->days->accept(*this);
time += (unsigned long)(current_value * 24 * 3600 * SECOND);
return NULL;
}
/* SYM_REF2(hours_c, hours, minutes) */
void *visit(hours_c *symbol) {
if (symbol->minutes)
symbol->minutes->accept(*this);
symbol->hours->accept(*this);
time += (unsigned long)(current_value * 3600 * SECOND);
return NULL;
}
/* SYM_REF2(minutes_c, minutes, seconds) */
void *visit(minutes_c *symbol) {
if (symbol->seconds)
symbol->seconds->accept(*this);
symbol->minutes->accept(*this);
time += (unsigned long)(current_value * 60 * SECOND);
return NULL;
}
/* SYM_REF2(seconds_c, seconds, milliseconds) */
void *visit(seconds_c *symbol) {
if (symbol->milliseconds)
symbol->milliseconds->accept(*this);
symbol->seconds->accept(*this);
time += (unsigned long)(current_value * SECOND);
return NULL;
}
/* SYM_REF2(milliseconds_c, milliseconds, unused) */
void *visit(milliseconds_c *symbol) {
symbol->milliseconds->accept(*this);
time += (unsigned long)(current_value * MILLISECOND);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class calculate_common_ticktime_c: public iterator_visitor_c {
private:
unsigned long common_ticktime;
public:
calculate_common_ticktime_c(void){common_ticktime = 0;}
unsigned long euclide(unsigned long a, unsigned long b) {
unsigned long c = a % b;
if (c == 0)
return b;
else
return euclide(b, c);
}
void update_ticktime(unsigned long time) {
if (common_ticktime == 0)
common_ticktime = time;
else if (time > common_ticktime)
common_ticktime = euclide(time, common_ticktime);
else
common_ticktime = euclide(common_ticktime, time);
}
unsigned long get_ticktime(void) {
return common_ticktime;
}
/* TASK task_name task_initialization */
//SYM_REF2(task_configuration_c, task_name, task_initialization)
void *visit(task_initialization_c *symbol) {
calculate_time_c calculate_time;
unsigned long time = 0;
if (symbol->interval_data_source != NULL) {
symbol->interval_data_source->accept(calculate_time);
time = calculate_time.get_time();
}
if (time > 0)
update_ticktime(time);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* A helper class that knows how to generate code for both the IL and ST languages... */
class generate_c_SFC_IL_ST_c: public null_visitor_c {
private:
stage4out_c *s4o_ptr;
symbol_c *scope;
const char *variable_prefix;
public:
generate_c_SFC_IL_ST_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL);
/*********************************************/
/* B.1.6 Sequential function chart elements */
/*********************************************/
/*| sequential_function_chart sfc_network*/
void *visit(sequential_function_chart_c * symbol);
/****************************************/
/* B.2 - Language IL (Instruction List) */
/****************************************/
/***********************************/
/* B 2.1 Instructions and Operands */
/***********************************/
/*| instruction_list il_instruction */
void *visit(instruction_list_c *symbol);
/* Remainder implemented in generate_c_il_c... */
/***************************************/
/* B.3 - Language ST (Structured Text) */
/***************************************/
/***********************/
/* B 3.1 - Expressions */
/***********************/
/* Implemented in generate_c_st_c */
/********************/
/* B 3.2 Statements */
/********************/
void *visit(statement_list_c *symbol);
/* Remainder implemented in generate_c_st_c... */
};
#include "generate_c_sfc.cc"
generate_c_SFC_IL_ST_c::generate_c_SFC_IL_ST_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix) {
if (NULL == scope) ERROR;
this->s4o_ptr = s4o_ptr;
this->scope = scope;
this->variable_prefix = variable_prefix;
}
void *generate_c_SFC_IL_ST_c::visit(sequential_function_chart_c * symbol) {
generate_c_sfc_c generate_c_sfc(s4o_ptr, scope, variable_prefix);
generate_c_sfc.generate(symbol);
return NULL;
}
void *generate_c_SFC_IL_ST_c::visit(instruction_list_c *symbol) {
generate_c_il_c generate_c_il(s4o_ptr, scope, variable_prefix);
generate_c_il.generate(symbol);
return NULL;
}
void *generate_c_SFC_IL_ST_c::visit(statement_list_c *symbol) {
generate_c_st_c generate_c_st(s4o_ptr, scope, variable_prefix);
generate_c_st.generate(symbol);
return NULL;
}
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_pous_c: public generate_c_typedecl_c {
public:
generate_c_pous_c(stage4out_c *s4o_ptr)
: generate_c_typedecl_c(s4o_ptr) {};
virtual ~generate_c_pous_c(void) {}
public:
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
/* done in base class(es) */
/*********************/
/* B 1.2 - Constants */
/*********************/
/* originally empty... */
/******************************/
/* B 1.2.1 - Numeric Literals */
/******************************/
/* done in base class(es) */
/*******************************/
/* B.1.2.2 Character Strings */
/*******************************/
/* done in base class(es) */
/***************************/
/* B 1.2.3 - Time Literals */
/***************************/
/************************/
/* B 1.2.3.1 - Duration */
/************************/
/* done in base class(es) */
/************************************/
/* B 1.2.3.2 - Time of day and Date */
/************************************/
/* done in base class(es) */
/**********************/
/* B.1.3 - Data types */
/**********************/
/***********************************/
/* B 1.3.1 - Elementary Data Types */
/***********************************/
/* done in base class(es) */
/********************************/
/* B.1.3.2 - Generic data types */
/********************************/
/* originally empty... */
/********************************/
/* B 1.3.3 - Derived data types */
/********************************/
/* done in base class(es) */
/*********************/
/* B 1.4 - Variables */
/*********************/
/* done in base class(es) */
/********************************************/
/* B.1.4.1 Directly Represented Variables */
/********************************************/
/* done in base class(es) */
/*************************************/
/* B.1.4.2 Multi-element Variables */
/*************************************/
/* done in base class(es) */
/******************************************/
/* B 1.4.3 - Declaration & Initialisation */
/******************************************/
/* done in base class(es) */
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/***********************/
/* B 1.5.1 - Functions */
/***********************/
public:
/* FUNCTION derived_function_name ':' elementary_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
/* | FUNCTION derived_function_name ':' derived_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
void *visit(function_declaration_c *symbol) {
generate_c_vardecl_c *vardecl;
TRACE("function_declaration_c");
/* start off by adding this declaration to the global
* function declaration symbol table...
*/
function_symtable.insert(symbol->derived_function_name, symbol);
/* (A) Function declaration... */
/* (A.1) Function return type */
s4o.print("// FUNCTION\n");
symbol->type_name->accept(*this); /* return type */
s4o.print(" ");
/* (A.2) Function name */
symbol->derived_function_name->accept(*this);
s4o.print("(");
/* (A.3) Function parameters */
s4o.indent_right();
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::finterface_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt);
vardecl->print(symbol->var_declarations_list);
delete vardecl;
s4o.indent_left();
s4o.print(")\n" + s4o.indent_spaces + "{\n");
/* (B) Function local variable declaration */
/* (B.1) Variables declared in ST source code */
s4o.indent_right();
vardecl = new generate_c_vardecl_c(&s4o, generate_c_vardecl_c::localinit_vf, generate_c_vardecl_c::private_vt);
vardecl->print(symbol->var_declarations_list);
delete vardecl;
/* (B.2) Temporary variable for function's return value */
/* It will have the same name as the function itself! */
s4o.print(s4o.indent_spaces);
symbol->type_name->accept(*this); /* return type */
s4o.print(" ");
symbol->derived_function_name->accept(*this);
s4o.print(" = ");
{
/* get the default value of this variable's type */
symbol_c *default_value = (symbol_c *)symbol->type_name->accept(*type_initial_value_c::instance());
if (default_value == NULL) ERROR;
default_value->accept(*this);
}
s4o.print(";\n\n");
/* (C) Function body */
generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol);
symbol->function_body->accept(generate_c_code);
s4o.print(s4o.indent_spaces + "return ");
symbol->derived_function_name->accept(*this);
s4o.print(";\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n\n");
return NULL;
}
/* The remaining var_declarations_list_c, function_var_decls_c
* and var2_init_decl_list_c are handled in the generate_c_vardecl_c class
*/
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
public:
/* 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) {
generate_c_vardecl_c *vardecl;
generate_c_sfcdecl_c *sfcdecl;
TRACE("function_block_declaration_c");
/* start off by adding this declaration to the global
* function block declaration symbol table...
*/
function_block_type_symtable.insert(symbol->fblock_name, symbol);
/* (A) Function Block data structure declaration... */
/* (A.1) Data structure declaration */
s4o.print("// FUNCTION_BLOCK ");
symbol->fblock_name->accept(*this);
s4o.print("\n// Data part\n");
s4o.print("typedef struct {\n");
s4o.indent_right();
/* (A.2) Public variables: i.e. the function parameters... */
s4o.print(s4o.indent_spaces + "// FB Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
s4o.print("\n");
/* (A.3) Private internal variables */
s4o.print(s4o.indent_spaces + "// FB private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::temp_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
/* (A.4) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcdecl_sd);
sfcdecl->print(symbol->fblock_body);
delete sfcdecl;
s4o.print("\n");
/* (A.5) Function Block data structure type name. */
s4o.indent_left();
s4o.print("} ");
symbol->fblock_name->accept(*this);
s4o.print(";\n\n");
/* (B) Constructor */
/* (B.1) Constructor name... */
s4o.print(s4o.indent_spaces + "void ");
symbol->fblock_name->accept(*this);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->fblock_name->accept(*this);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(") {\n");
s4o.indent_right();
/* (B.2) Member initializations... */
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
/* (B.3) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcinit_sd);
sfcdecl->print(symbol->fblock_body, FB_FUNCTION_PARAM"->");
delete sfcdecl;
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
/* (C) Function with FB body */
/* (C.1) Step definitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepdef_sd);
sfcdecl->print(symbol->fblock_body);
delete sfcdecl;
/* (C.2) Action definitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actiondef_sd);
sfcdecl->print(symbol->fblock_body);
delete sfcdecl;
/* (C.3) Function declaration */
s4o.print("// Code part\n");
/* function interface */
s4o.print("void ");
symbol->fblock_name->accept(*this);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->fblock_name->accept(*this);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(") {\n");
s4o.indent_right();
/* (C.4) Initialize TEMP variables */
/* function body */
s4o.print(s4o.indent_spaces + "// Initialise TEMP variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::init_vf,
generate_c_vardecl_c::temp_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
/* (C.5) Function code */
generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol, FB_FUNCTION_PARAM"->");
symbol->fblock_body->accept(generate_c_code);
s4o.indent_left();
s4o.print(s4o.indent_spaces + "} // ");
symbol->fblock_name->accept(*this);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print(s4o.indent_spaces + "() \n\n");
/* (C.6) Step undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepundef_sd);
sfcdecl->print(symbol->fblock_body);
delete sfcdecl;
/* (C.7) Action undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actionundef_sd);
sfcdecl->print(symbol->fblock_body);
delete sfcdecl;
s4o.indent_left();
s4o.print("\n\n\n\n");
return NULL;
}
/* The remaining temp_var_decls_c, temp_var_decls_list_c
* and non_retentive_var_decls_c are handled in the generate_c_vardecl_c class
*/
/**********************/
/* B 1.5.3 - Programs */
/**********************/
public:
/* PROGRAM program_type_name program_var_declarations_list function_block_body END_PROGRAM */
//SYM_REF4(program_declaration_c, program_type_name, var_declarations, function_block_body, unused)
void *visit(program_declaration_c *symbol) {
generate_c_vardecl_c *vardecl;
generate_c_sfcdecl_c *sfcdecl;
TRACE("program_declaration_c");
/* start off by adding this declaration to the global
* program declaration symbol table...
*/
program_type_symtable.insert(symbol->program_type_name, symbol);
/* (A) Program data structure declaration... */
/* (A.1) Data structure declaration */
s4o.print("// PROGRAM ");
symbol->program_type_name->accept(*this);
s4o.print("\n// Data part\n");
s4o.print("typedef struct {\n");
s4o.indent_right();
/* (A.2) Public variables: i.e. the program parameters... */
s4o.print(s4o.indent_spaces + "// PROGRAM Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
s4o.print("\n");
/* (A.3) Private internal variables */
s4o.print(s4o.indent_spaces + "// PROGRAM private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::temp_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
/* (A.4) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcdecl_sd);
sfcdecl->print(symbol->function_block_body);
delete sfcdecl;
/* (A.5) Program data structure type name. */
s4o.indent_left();
s4o.print("} ");
symbol->program_type_name->accept(*this);
s4o.print(";\n\n");
/* (B) Constructor */
/* (B.1) Constructor name... */
s4o.print(s4o.indent_spaces + "void ");
symbol->program_type_name->accept(*this);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->program_type_name->accept(*this);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(") {\n");
s4o.indent_right();
/* (B.2) Member initializations... */
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
/* (B.3) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcinit_sd);
sfcdecl->print(symbol->function_block_body,FB_FUNCTION_PARAM"->");
delete sfcdecl;
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
/* (C) Function with PROGRAM body */
/* (C.1) Step definitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepdef_sd);
sfcdecl->print(symbol->function_block_body);
delete sfcdecl;
/* (C.2) Action definitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actiondef_sd);
sfcdecl->print(symbol->function_block_body);
delete sfcdecl;
/* (C.3) Function declaration */
s4o.print("// Code part\n");
/* function interface */
s4o.print("void ");
symbol->program_type_name->accept(*this);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->program_type_name->accept(*this);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(") {\n");
s4o.indent_right();
/* (C.4) Initialize TEMP variables */
/* function body */
s4o.print(s4o.indent_spaces + "// Initialise TEMP variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::init_vf,
generate_c_vardecl_c::temp_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
/* (C.5) Function code */
generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol, FB_FUNCTION_PARAM"->");
symbol->function_block_body->accept(generate_c_code);
s4o.indent_left();
s4o.print(s4o.indent_spaces + "} // ");
symbol->program_type_name->accept(*this);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print(s4o.indent_spaces + "() \n\n");
/* (C.6) Step undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepundef_sd);
sfcdecl->print(symbol->function_block_body);
delete sfcdecl;
/* (C.7) Action undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actionundef_sd);
sfcdecl->print(symbol->function_block_body);
delete sfcdecl;
s4o.indent_left();
s4o.print("\n\n\n\n");
return NULL;
}
}; /* generate_c_pous_c */
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_config_c: public generate_c_typedecl_c {
public:
generate_c_config_c(stage4out_c *s4o_ptr)
: generate_c_typedecl_c(s4o_ptr) {};
virtual ~generate_c_config_c(void) {}
typedef enum {
initprotos_dt,
initdeclare_dt,
runprotos_dt,
rundeclare_dt
} declaretype_t;
declaretype_t wanted_declaretype;
/********************************/
/* B 1.7 Configuration elements */
/********************************/
public:
/*
CONFIGURATION configuration_name
optional_global_var_declarations
(resource_declaration_list | single_resource_declaration)
optional_access_declarations
optional_instance_specific_initializations
END_CONFIGURATION
*/
/*
SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused)
*/
void *visit(configuration_declaration_c *symbol) {
generate_c_vardecl_c *vardecl;
/* Insert the header... */
s4o.print("/*******************************************/\n");
s4o.print("/* FILE GENERATED BY iec2c */\n");
s4o.print("/* Editing this file is not recommended... */\n");
s4o.print("/*******************************************/\n\n");
s4o.print("#include \"iec_std_lib.h\"\n\n");
/* (A) configuration declaration... */
/* (A.1) configuration name in comment */
s4o.print("// CONFIGURATION ");
symbol->configuration_name->accept(*this);
s4o.print("\n");
/* (A.2) Global variables */
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::global_vt);
vardecl->print(symbol);
delete vardecl;
s4o.print("\n");
/* (B) Initialisation Function */
/* (B.1) Ressources initialisation protos... */
wanted_declaretype = initprotos_dt;
symbol->resource_declarations->accept(*this);
s4o.print("\n");
/* (B.2) Initialisation function name... */
s4o.print(s4o.indent_spaces + "void config");
s4o.print(FB_INIT_SUFFIX);
s4o.print("(void) {\n");
s4o.indent_right();
/* (B.3) Global variables initializations... */
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::global_vt);
vardecl->print(symbol);
delete vardecl;
s4o.print("\n");
/* (B.3) Resources initializations... */
wanted_declaretype = initdeclare_dt;
symbol->resource_declarations->accept(*this);
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
/* (C) Run Function*/
/* (C.1) Resources run functions protos... */
wanted_declaretype = runprotos_dt;
symbol->resource_declarations->accept(*this);
s4o.print("\n");
/* (C.2) Run function name... */
s4o.print(s4o.indent_spaces + "void config");
s4o.print(FB_RUN_SUFFIX);
s4o.print("(int tick) {\n");
s4o.indent_right();
/* (C.3) Resources initializations... */
wanted_declaretype = rundeclare_dt;
symbol->resource_declarations->accept(*this);
/* (C.3) Close Public Function body */
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
return NULL;
}
void *visit(resource_declaration_c *symbol) {
if (wanted_declaretype == initprotos_dt || wanted_declaretype == runprotos_dt) {
s4o.print(s4o.indent_spaces + "void ");
symbol->resource_name->accept(*this);
if (wanted_declaretype == initprotos_dt) {
s4o.print(FB_INIT_SUFFIX);
s4o.print("(void);\n");
}
else {
s4o.print(FB_RUN_SUFFIX);
s4o.print("(int tick);\n");
}
}
if (wanted_declaretype == initdeclare_dt || wanted_declaretype == rundeclare_dt) {
s4o.print(s4o.indent_spaces);
symbol->resource_name->accept(*this);
if (wanted_declaretype == initdeclare_dt) {
s4o.print(FB_INIT_SUFFIX);
s4o.print("();\n");
}
else {
s4o.print(FB_RUN_SUFFIX);
s4o.print("(tick);\n");
}
}
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
if (wanted_declaretype == initprotos_dt || wanted_declaretype == runprotos_dt) {
s4o.print(s4o.indent_spaces + "void RESOURCE");
if (wanted_declaretype == initprotos_dt) {
s4o.print(FB_INIT_SUFFIX);
s4o.print("(void);\n");
}
else {
s4o.print(FB_RUN_SUFFIX);
s4o.print("(int tick);\n");
}
}
if (wanted_declaretype == initdeclare_dt || wanted_declaretype == rundeclare_dt) {
s4o.print(s4o.indent_spaces + "RESOURCE");
if (wanted_declaretype == initdeclare_dt) {
s4o.print(FB_INIT_SUFFIX);
s4o.print("();\n");
}
else {
s4o.print(FB_RUN_SUFFIX);
s4o.print("(tick);\n");
}
}
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_resources_c: public generate_c_typedecl_c {
search_var_instance_decl_c *search_config_instance;
search_var_instance_decl_c *search_resource_instance;
private:
/* The name of the resource curretnly being processed... */
symbol_c *current_resource_name;
symbol_c *current_global_vars;
public:
generate_c_resources_c(stage4out_c *s4o_ptr, symbol_c *config_scope, symbol_c *resource_scope, unsigned long time)
: generate_c_typedecl_c(s4o_ptr) {
search_config_instance = new search_var_instance_decl_c(config_scope);
search_resource_instance = new search_var_instance_decl_c(resource_scope);
common_ticktime = time;
current_resource_name = NULL;
current_global_vars = NULL;
};
virtual ~generate_c_resources_c(void) {
delete search_config_instance;
delete search_resource_instance;
}
typedef enum {
declare_dt,
init_dt,
run_dt
} declaretype_t;
declaretype_t wanted_declaretype;
unsigned long common_ticktime;
const char *current_program_name;
typedef enum {
assign_at,
send_at
} assigntype_t;
assigntype_t wanted_assigntype;
/********************************/
/* B 1.7 Configuration elements */
/********************************/
/*
RESOURCE resource_name ON resource_type_name
optional_global_var_declarations
single_resource_declaration
END_RESOURCE
*/
// SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
void *visit(resource_declaration_c *symbol) {
current_resource_name = symbol->resource_name;
current_global_vars = symbol->global_var_declarations;
symbol->resource_declaration->accept(*this);
current_resource_name = NULL;
current_global_vars = NULL;
return NULL;
}
/* task_configuration_list program_configuration_list */
// SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
void *visit(single_resource_declaration_c *symbol) {
bool single_resource = current_resource_name == NULL;
if (single_resource)
current_resource_name = new identifier_c("RESOURCE");
generate_c_vardecl_c *vardecl;
/* Insert the header... */
s4o.print("/*******************************************/\n");
s4o.print("/* FILE GENERATED BY iec2c */\n");
s4o.print("/* Editing this file is not recommended... */\n");
s4o.print("/*******************************************/\n\n");
s4o.print("#include \"iec_std_lib.h\"\n\n");
/* (A) resource declaration... */
/* (A.1) resource name in comment */
s4o.print("// RESOURCE ");
current_resource_name->accept(*this);
s4o.print("\n");
/* (A.2) Global variables... */
if (current_global_vars != NULL) {
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::global_vt);
vardecl->print(current_global_vars);
delete vardecl;
}
s4o.print("\n");
/* (A.3) POUs inclusion */
s4o.print("#include \"POUS.c\"\n\n");
/* (A.4) Resource programs declaration... */
wanted_declaretype = declare_dt;
symbol->program_configuration_list->accept(*this);
s4o.print("\n");
/* (B) resource initialisation function... */
/* (B.1) initialisation function name... */
s4o.print("void ");
current_resource_name->accept(*this);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(void) {\n");
s4o.indent_right();
/* (B.2) Global variables initialisations... */
if (current_global_vars != NULL) {
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::global_vt);
vardecl->print(current_global_vars);
delete vardecl;
}
s4o.print("\n");
/* (B.3) Resource programs initialisations... */
wanted_declaretype = init_dt;
symbol->program_configuration_list->accept(*this);
s4o.indent_left();
s4o.print("}\n\n");
/* (C) Resource run function... */
/* (C.1) Run function name... */
s4o.print("void ");
current_resource_name->accept(*this);
s4o.print(FB_RUN_SUFFIX);
s4o.print("(int tick) {\n");
s4o.indent_right();
/* (C.2) Task management... */
symbol->task_configuration_list->accept(*this);
/* (C.3) Program run declaration... */
wanted_declaretype = run_dt;
symbol->program_configuration_list->accept(*this);
s4o.indent_left();
s4o.print("}\n\n");
if (single_resource) {
delete current_resource_name;
current_resource_name = NULL;
}
return NULL;
}
/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
//SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused)
void *visit(program_configuration_c *symbol) {
if (wanted_declaretype == declare_dt) {
s4o.print(s4o.indent_spaces);
symbol->program_type_name->accept(*this);
s4o.print(" ");
symbol->program_name->accept(*this);
s4o.print(";\n");
}
if (wanted_declaretype == init_dt) {
s4o.print(s4o.indent_spaces);
symbol->program_type_name->accept(*this);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(&");
symbol->program_name->accept(*this);
s4o.print(");\n");
}
if (wanted_declaretype == run_dt) {
current_program_name = ((identifier_c*)(symbol->program_name))->value;
if (symbol->task_name != NULL) {
s4o.print(s4o.indent_spaces);
s4o.print("if (!");
symbol->task_name->accept(*this);
s4o.print(") {\n");
s4o.indent_right();
}
wanted_assigntype = assign_at;
if (symbol->prog_conf_elements != NULL)
symbol->prog_conf_elements->accept(*this);
s4o.print(s4o.indent_spaces);
symbol->program_type_name->accept(*this);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(&");
symbol->program_name->accept(*this);
s4o.print(");\n");
wanted_assigntype = send_at;
if (symbol->prog_conf_elements != NULL)
symbol->prog_conf_elements->accept(*this);
if (symbol->task_name != NULL) {
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
}
}
return NULL;
}
/* TASK task_name task_initialization */
//SYM_REF2(task_configuration_c, task_name, task_initialization)
void *visit(task_configuration_c *symbol) {
s4o.print(s4o.indent_spaces + "int ");
symbol->task_name->accept(*this);
s4o.print(" = ");
symbol->task_initialization->accept(*this);
s4o.print(";\n");
return NULL;
}
/* '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */
//SYM_REF4(task_initialization_c, single_data_source, interval_data_source, priority_data_source, unused)
void *visit(task_initialization_c *symbol) {
if (symbol->interval_data_source != NULL) {
calculate_time_c calculate_time;
symbol->interval_data_source->accept(calculate_time);
unsigned long time = calculate_time.get_time();
if (time != 0) {
s4o.print("tick % ");
s4o.print_integer((int)(time / common_ticktime));
}
else
s4o.print("1");
}
else
s4o.print("1");
return NULL;
}
/* any_symbolic_variable ASSIGN prog_data_source */
//SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source)
void *visit(prog_cnxn_assign_c *symbol) {
if (wanted_assigntype == assign_at) {
symbol_c *var_decl;
unsigned int vartype = 0;
symbol_c *current_var_reference = ((global_var_reference_c *)(symbol->prog_data_source))->global_var_name;
var_decl = search_resource_instance->get_decl(current_var_reference);
if (var_decl == NULL) {
var_decl = search_config_instance->get_decl(current_var_reference);
if (var_decl == NULL)
ERROR;
else
vartype = search_config_instance->get_vartype();
}
else
vartype = search_resource_instance->get_vartype();
s4o.print(s4o.indent_spaces + "{extern ");
var_decl->accept(*this);
s4o.print(" ");
symbol->prog_data_source->accept(*this);
s4o.print("; ");
s4o.print(current_program_name);
s4o.print(".");
symbol->symbolic_variable->accept(*this);
s4o.print(" = ");
if (vartype || search_var_instance_decl_c::global_vt)
s4o.print("*");
symbol->prog_data_source->accept(*this);
s4o.print(";}\n");
}
return NULL;
}
/* any_symbolic_variable SENDTO data_sink */
//SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, data_sink)
void *visit(prog_cnxn_sendto_c *symbol) {
if (wanted_assigntype == send_at) {
symbol_c *var_decl;
unsigned int vartype = 0;
symbol_c *current_var_reference = ((global_var_reference_c *)(symbol->data_sink))->global_var_name;
var_decl = search_resource_instance->get_decl(current_var_reference);
if (var_decl == NULL) {
var_decl = search_config_instance->get_decl(current_var_reference);
if (var_decl == NULL)
ERROR;
else
vartype = search_config_instance->get_vartype();
}
else
vartype = search_resource_instance->get_vartype();
s4o.print(s4o.indent_spaces);
s4o.print(s4o.indent_spaces + "{extern ");
var_decl->accept(*this);
s4o.print(" ");
symbol->data_sink->accept(*this);
s4o.print("; ");
if (vartype || search_var_instance_decl_c::global_vt)
s4o.print("*");
symbol->data_sink->accept(*this);
s4o.print(" = ");
s4o.print(current_program_name);
s4o.print(".");
symbol->symbolic_variable->accept(*this);
s4o.print("};\n");
}
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_c: public iterator_visitor_c {
protected:
stage4out_c &s4o;
stage4out_c pous_s4o;
stage4out_c located_variables_s4o;
generate_c_pous_c generate_c_pous;
symbol_c *current_configuration;
const char *current_name;
const char *current_builddir;
unsigned long common_ticktime;
public:
generate_c_c(stage4out_c *s4o_ptr, const char *builddir):
s4o(*s4o_ptr),
pous_s4o(builddir, "POUS", "c"),
located_variables_s4o(builddir, "LOCATED_VARIABLES","h"),
generate_c_pous(&pous_s4o) {
current_builddir = builddir;
current_configuration = NULL;
}
~generate_c_c(void) {}
/***************************/
/* B 0 - Programming Model */
/***************************/
void *visit(library_c *symbol) {
generate_location_list_c generate_location_list(&located_variables_s4o);
symbol->accept(generate_location_list);
for(int i = 0; i < symbol->n; i++) {
symbol->elements[i]->accept(*this);
}
return NULL;
}
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *symbol) {
current_name = symbol->value;
return NULL;
}
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol) {
symbol->accept(generate_c_pous);
return NULL;
}
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
void *visit(function_block_declaration_c *symbol) {
symbol->accept(generate_c_pous);
return NULL;
}
/**********************/
/* B 1.5.3 - Programs */
/**********************/
void *visit(program_declaration_c *symbol) {
symbol->accept(generate_c_pous);
return NULL;
}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(configuration_declaration_c *symbol) {
static int configuration_count = 0;
if (configuration_count++) {
/* the first configuration is the one we will use!! */
ERROR;
}
current_configuration = symbol;
calculate_common_ticktime_c calculate_common_ticktime;
symbol->accept(calculate_common_ticktime);
common_ticktime = calculate_common_ticktime.get_ticktime();
symbol->configuration_name->accept(*this);
stage4out_c config_s4o(current_builddir, current_name, "c");
generate_c_config_c generate_c_config(&config_s4o);
symbol->accept(generate_c_config);
config_s4o.print("int common_ticktime__ = ");
config_s4o.print_integer((int)(common_ticktime / 1000000));
config_s4o.print("; /*ms*/\n");
symbol->resource_declarations->accept(*this);
current_configuration = NULL;
return NULL;
}
void *visit(resource_declaration_c *symbol) {
symbol->resource_name->accept(*this);
stage4out_c resources_s4o(current_builddir, current_name, "c");
generate_c_resources_c generate_c_resources(&resources_s4o, current_configuration, symbol, common_ticktime);
symbol->accept(generate_c_resources);
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
stage4out_c resources_s4o(current_builddir, "RESOURCE", "c");
generate_c_resources_c generate_c_resources(&resources_s4o, current_configuration, symbol, common_ticktime);
symbol->accept(generate_c_resources);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
visitor_c *new_code_generator(stage4out_c *s4o, const char *builddir) {return new generate_c_c(s4o, builddir);}
void delete_code_generator(visitor_c *code_generator) {delete code_generator;}