/*
* 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.
*/
#include <string>
#include <iostream>
#include <sstream>
#include <typeinfo>
#include <list>
#include <map>
#include <sstream>
#include <strings.h>
#include "../../util/symtable.hh"
#include "../../util/dsymtable.hh"
#include "../../absyntax/visitor.hh"
#include "../../absyntax_utils/absyntax_utils.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);
#define STAGE4_ERROR(symbol1, symbol2, ...) {stage4err("while generating C code", symbol1, symbol2, __VA_ARGS__); exit(EXIT_FAILURE);}
/***********************************************************************/
/* 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_"
/* Variable declaration symbol for accessor macros */
#define DECLARE_VAR "__DECLARE_VAR"
#define DECLARE_GLOBAL "__DECLARE_GLOBAL"
#define DECLARE_GLOBAL_LOCATION "__DECLARE_GLOBAL_LOCATION"
#define DECLARE_GLOBAL_LOCATED "__DECLARE_GLOBAL_LOCATED"
#define DECLARE_EXTERNAL "__DECLARE_EXTERNAL"
#define DECLARE_LOCATED "__DECLARE_LOCATED"
#define DECLARE_GLOBAL_PROTOTYPE "__DECLARE_GLOBAL_PROTOTYPE"
/* Variable declaration symbol for accessor macros */
#define INIT_VAR "__INIT_VAR"
#define INIT_GLOBAL "__INIT_GLOBAL"
#define INIT_GLOBAL_LOCATED "__INIT_GLOBAL_LOCATED"
#define INIT_EXTERNAL "__INIT_EXTERNAL"
#define INIT_LOCATED "__INIT_LOCATED"
#define INIT_LOCATED_VALUE "__INIT_LOCATED_VALUE"
/* Variable getter symbol for accessor macros */
#define GET_VAR "__GET_VAR"
#define GET_EXTERNAL "__GET_EXTERNAL"
#define GET_LOCATED "__GET_LOCATED"
#define GET_VAR_BY_REF "__GET_VAR_BY_REF"
#define GET_EXTERNAL_BY_REF "__GET_EXTERNAL_BY_REF"
#define GET_LOCATED_BY_REF "__GET_LOCATED_BY_REF"
/* Variable setter symbol for accessor macros */
#define SET_VAR "__SET_VAR"
#define SET_EXTERNAL "__SET_EXTERNAL"
#define SET_LOCATED "__SET_LOCATED"
/* Variable initial value symbol for accessor macros */
#define INITIAL_VALUE "__INITIAL_VALUE"
/* 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_"
/* please see the comment before the RET_operator_c visitor for details... */
#define END_LABEL VAR_LEADER "end"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#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"
#include "generate_var_list.cc"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#include "generate_c.hh"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* A helper class that prints out the identifiers for function calls to overloaded functions */
/* Given a function declaration of the function being called, it
* will simply print out the returned data type,
* followed by the data types of all input, output, and in_out parameters.
* for e.g.;
* SIN( REAL) : REAL -> prints out -> REAL__REAL
* LEN( STRING) : INT -> prints out -> INT__STRING
* MUL(TIME, INT) : TIME -> prints out -> TIME__TIME__INT
*/
class print_function_parameter_data_types_c: public generate_c_base_c {
private:
symbol_c *current_type;
bool_type_name_c tmp_bool;
void print_list(symbol_c *var_list, symbol_c *data_type) {
if (data_type != NULL) {
/* print out the data type once for every variable! */
list_c *list = dynamic_cast<list_c *>(var_list);
if (list == NULL) ERROR;
for (int i=0; i < list->n; i++) {
s4o.print("__");
data_type->accept(*this);
}
}
}
public:
print_function_parameter_data_types_c(stage4out_c *s4o_ptr):
generate_c_base_c(s4o_ptr)
{current_type = NULL;}
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/***********************/
/* B 1.5.1 - Functions */
/***********************/
/* 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) {
symbol->type_name->accept(*this); /* return type */
symbol->var_declarations_list->accept(*this);
return NULL;
}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(var_declarations_list_c *symbol) {// iterate through list}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(input_declarations_c *symbol) {// iterate through list}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(input_declaration_list_c *symbol) {// iterate through list}
void *visit(edge_declaration_c *symbol) {
current_type = &tmp_bool;
symbol->var1_list->accept(*this);
current_type = NULL;
return NULL;
}
/* We do NOT print out EN and ENO parameters! */
void *visit(en_param_declaration_c *symbol) {return NULL;}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(output_declarations_c *symbol) {// iterate through list}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(var_init_decl_list_c *symbol) {// iterate through list}
void *visit(simple_spec_init_c *symbol) {
/* return the data type */
return symbol->simple_specification;
}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* NOTE: although this class may also sometimes point to a previously_declared_subrange_type_name
* we don't need this for now, so it is easier to just skip it allocation
*/
void *visit(subrange_spec_init_c *symbol) {return NULL;}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* NOTE: although this class may also sometimes point to a previously_declared_enumerated_type_name
* we don't need this for now, so it is easier to just skip it allocation
*/
void *visit(enumerated_spec_init_c *symbol) {return NULL;}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* NOTE: although this class may also sometimes point to a previously_declared_array_type_name
* we don't need this for now, so it is easier to just skip it allocation
*/
void *visit(array_var_init_decl_c *symbol) {return NULL;}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* NOTE: although this class may also sometimes point to a previously_declared_structured_type_name
* we don't need this for now, so it is easier to just skip it allocation
*/
void *visit(structured_var_init_decl_c *symbol) {return NULL;}
/* We do NOT print out EN and ENO parameters! */
void *visit(eno_param_declaration_c *symbol) {return NULL;}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(input_output_declarations_c *symbol) {// iterate through list}
/* already handled by iterator base class (note that generate_c_base_c inherits from iterator_c) */
//void *visit(var_declaration_list_c *symbol) {iterate through list}
void *visit(fb_name_decl_c *symbol) {
print_list(symbol->fb_name_list, symbol->function_block_type_name);
return NULL;
}
void *visit(var1_init_decl_c *symbol) {
print_list(symbol->var1_list, (symbol_c *)symbol->spec_init->accept(*this));
return NULL;
}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
void *visit(array_var_declaration_c *symbol) {return NULL;}
void *visit(structured_var_declaration_c *symbol) {
current_type = symbol->structure_type_name;
symbol->var1_list->accept(*this);
current_type = NULL;
return NULL;
}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* Note that this class is used for fixed length strings...
* STRING [ 42 ]
*/
void *visit(single_byte_string_var_declaration_c *symbol) {return NULL;}
/* currently we do not support data types defined in the declaration itself */
/* For now, sugest the user define a TYPE .. END_TYPE */
/* Note that this class is used for fixed length strings...
* WSTRING [ 42 ]
*/
void *visit(double_byte_string_var_declaration_c *symbol) {return NULL;}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#include "generate_c_st.cc"
#include "generate_c_il.cc"
#include "generate_c_inlinefcall.cc"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#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 long time;
float current_value;
public:
calculate_time_c(void){time = 0;};
unsigned long long get_time(void) {return time;};
/* NOTE: we should really remove this function, and replace it with extract_integer_value() (in absyntax_utils.h)
* but right now I don't want to spend time checking if this change will introduce some conversion bug
* since it returns a long long, and not a float!
*/
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;
}
/* NOTE: this function is incomplete, as it should also be removing '_' inserted into the literal,
* but we leave it for now.
* In truth, we should really have an extract_real_value() in absyntax_util.h !!!
*/
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)
{STAGE4_ERROR(symbol, symbol, "Negative TIME literals are not currently supported"); ERROR;}
symbol->interval->accept(*this);
return NULL;
}
/* SYM_TOKEN(fixed_point_c) */
void *visit(fixed_point_c *symbol) {return get_float_value(symbol);}
/* SYM_REF5(interval_c, days, hours, minutes, seconds, milliseconds) */
void *visit(interval_c *symbol) {
current_value = 0;
if (NULL != symbol->milliseconds) symbol->milliseconds->accept(*this);
time += (unsigned long long)(current_value * MILLISECOND);
current_value = 0;
if (NULL != symbol->seconds) symbol->seconds->accept(*this);
time += (unsigned long long)(current_value * SECOND);
current_value = 0;
if (NULL != symbol->minutes) symbol->minutes->accept(*this);
time += (unsigned long long)(current_value * 60 * SECOND);
current_value = 0;
if (NULL != symbol->hours) symbol->hours->accept(*this);
time += (unsigned long long)(current_value * 60 * 60 * SECOND);
current_value = 0;
if (NULL != symbol->days) symbol->days->accept(*this);
time += (unsigned long long)(current_value * 60 * 60 * 24 * SECOND);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class calculate_common_ticktime_c: public iterator_visitor_c {
private:
unsigned long long common_ticktime;
unsigned long long least_common_ticktime;
public:
calculate_common_ticktime_c(void){
common_ticktime = 0;
least_common_ticktime = 0;
}
unsigned long long euclide(unsigned long long a, unsigned long long b) {
unsigned long long c = a % b;
if (c == 0)
return b;
else
return euclide(b, c);
}
void update_ticktime(unsigned long 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);
if (least_common_ticktime == 0)
least_common_ticktime = time;
else
least_common_ticktime = (least_common_ticktime * time) / common_ticktime;
}
unsigned long long get_common_ticktime(void) {
return common_ticktime;
}
unsigned long get_greatest_tick_count(void) {
unsigned long long least_common_tick = least_common_ticktime / common_ticktime;
if (least_common_tick >> 32)
ERROR;
return (unsigned long)(~(((unsigned long)-1) % (unsigned long)least_common_tick) + 1);
}
/* 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 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 the SFC, IL and ST languages... */
class generate_c_SFC_IL_ST_c: public null_visitor_c {
private:
stage4out_c *s4o_ptr;
symbol_c *scope;
symbol_c *fbname;
const char *variable_prefix;
public:
generate_c_SFC_IL_ST_c(stage4out_c *s4o_ptr, symbol_c *name, symbol_c *scope, const char *variable_prefix = NULL);
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {s4o_ptr->enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o_ptr->disable_output(); return 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 *name, symbol_c *scope, const char *variable_prefix) {
if (NULL == scope) ERROR;
this->s4o_ptr = s4o_ptr;
this->scope = scope;
this->fbname = name;
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, fbname, 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, fbname, 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, fbname, scope, variable_prefix);
generate_c_st.generate(symbol);
return NULL;
}
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_datatypes_c: public generate_c_typedecl_c {
public:
typedef enum {
none_im,
arrayname_im,
arraydeclaration_im,
} inlinearray_mode_t;
private:
stage4out_c *s4o_ptr;
std::map<std::string, int> inline_array_defined;
std::string current_array_name;
inlinearray_mode_t current_mode;
public:
generate_c_datatypes_c(stage4out_c *s4o_ptr, stage4out_c *s4o_incl_ptr)
: generate_c_typedecl_c(s4o_ptr, s4o_incl_ptr) {
generate_c_datatypes_c::s4o_ptr = s4o_ptr;
current_mode = none_im;
};
virtual ~generate_c_datatypes_c(void) {
while (!inline_array_defined.empty()) {
inline_array_defined.erase(inline_array_defined.begin());
}
}
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *symbol) {
switch (current_mode) {
case arrayname_im:
current_array_name += symbol->value;
break;
case arraydeclaration_im:
s4o_incl.print(symbol->value);
break;
default:
return generate_c_base_c::visit(symbol);
break;
}
return NULL;
}
/**********************/
/* B.1.3 - Data types */
/**********************/
/***********************************/
/* B 1.3.1 - Elementary Data Types */
/***********************************/
#define HANDLE_ELEMENTARY_DATA_TYPE(datatype_symbol, datatype_name)\
void *visit(datatype_symbol *symbol) {\
switch (current_mode) {\
case arrayname_im:\
current_array_name += datatype_name;\
break;\
case arraydeclaration_im:\
s4o_incl.print(datatype_name);\
break;\
default:\
return generate_c_base_c::visit(symbol);\
break;\
}\
return NULL;\
}
HANDLE_ELEMENTARY_DATA_TYPE(time_type_name_c, "TIME")
HANDLE_ELEMENTARY_DATA_TYPE(bool_type_name_c, "BOOL")
HANDLE_ELEMENTARY_DATA_TYPE(sint_type_name_c, "SINT")
HANDLE_ELEMENTARY_DATA_TYPE(int_type_name_c, "INT")
HANDLE_ELEMENTARY_DATA_TYPE(dint_type_name_c, "DINT")
HANDLE_ELEMENTARY_DATA_TYPE(lint_type_name_c, "LINT")
HANDLE_ELEMENTARY_DATA_TYPE(usint_type_name_c, "USINT")
HANDLE_ELEMENTARY_DATA_TYPE(uint_type_name_c, "UINT")
HANDLE_ELEMENTARY_DATA_TYPE(udint_type_name_c, "UDINT")
HANDLE_ELEMENTARY_DATA_TYPE(ulint_type_name_c, "ULINT")
HANDLE_ELEMENTARY_DATA_TYPE(real_type_name_c, "REAL")
HANDLE_ELEMENTARY_DATA_TYPE(lreal_type_name_c, "LREAL")
HANDLE_ELEMENTARY_DATA_TYPE(date_type_name_c, "DATE")
HANDLE_ELEMENTARY_DATA_TYPE(tod_type_name_c, "TOD")
HANDLE_ELEMENTARY_DATA_TYPE(dt_type_name_c, "DT")
HANDLE_ELEMENTARY_DATA_TYPE(byte_type_name_c, "BYTE")
HANDLE_ELEMENTARY_DATA_TYPE(word_type_name_c, "WORD")
HANDLE_ELEMENTARY_DATA_TYPE(dword_type_name_c, "DWORD")
HANDLE_ELEMENTARY_DATA_TYPE(lword_type_name_c, "LWORD")
HANDLE_ELEMENTARY_DATA_TYPE(string_type_name_c, "STRING")
HANDLE_ELEMENTARY_DATA_TYPE(wstring_type_name_c, "WSTRING")
HANDLE_ELEMENTARY_DATA_TYPE(safetime_type_name_c, "TIME")
HANDLE_ELEMENTARY_DATA_TYPE(safebool_type_name_c, "BOOL")
HANDLE_ELEMENTARY_DATA_TYPE(safesint_type_name_c, "SINT")
HANDLE_ELEMENTARY_DATA_TYPE(safeint_type_name_c, "INT")
HANDLE_ELEMENTARY_DATA_TYPE(safedint_type_name_c, "DINT")
HANDLE_ELEMENTARY_DATA_TYPE(safelint_type_name_c, "LINT")
HANDLE_ELEMENTARY_DATA_TYPE(safeusint_type_name_c, "USINT")
HANDLE_ELEMENTARY_DATA_TYPE(safeuint_type_name_c, "UINT")
HANDLE_ELEMENTARY_DATA_TYPE(safeudint_type_name_c, "UDINT")
HANDLE_ELEMENTARY_DATA_TYPE(safeulint_type_name_c, "ULINT")
HANDLE_ELEMENTARY_DATA_TYPE(safereal_type_name_c, "REAL")
HANDLE_ELEMENTARY_DATA_TYPE(safelreal_type_name_c, "LREAL")
HANDLE_ELEMENTARY_DATA_TYPE(safedate_type_name_c, "DATE")
HANDLE_ELEMENTARY_DATA_TYPE(safetod_type_name_c, "TOD")
HANDLE_ELEMENTARY_DATA_TYPE(safedt_type_name_c, "DT")
HANDLE_ELEMENTARY_DATA_TYPE(safebyte_type_name_c, "BYTE")
HANDLE_ELEMENTARY_DATA_TYPE(safeword_type_name_c, "WORD")
HANDLE_ELEMENTARY_DATA_TYPE(safedword_type_name_c, "DWORD")
HANDLE_ELEMENTARY_DATA_TYPE(safelword_type_name_c, "LWORD")
HANDLE_ELEMENTARY_DATA_TYPE(safestring_type_name_c, "STRING")
HANDLE_ELEMENTARY_DATA_TYPE(safewstring_type_name_c, "WSTRING")
/******************************************/
/* B 1.4.3 - Declaration & Initialization */
/******************************************/
void *visit(input_declarations_c *symbol) {
symbol->input_declaration_list->accept(*this);
return NULL;
}
void *visit(edge_declaration_c *symbol) {
return NULL;
}
void *visit(en_param_declaration_c *symbol) {
return NULL;
}
void *visit(eno_param_declaration_c *symbol) {
return NULL;
}
void *visit(var1_init_decl_c *symbol) {
return NULL;
}
/* var1_list ':' array_spec_init */
// SYM_REF2(array_var_init_decl_c, var1_list, array_spec_init)
void *visit(array_var_init_decl_c *symbol) {
current_mode = arrayname_im;
symbol->array_spec_init->accept(*this);
current_mode = none_im;
return NULL;
}
/* array_specification [ASSIGN array_initialization] */
/* array_initialization may be NULL ! */
void *visit(array_spec_init_c *symbol) {
switch (current_mode) {
case arrayname_im:
{
array_specification_c *specification = dynamic_cast<array_specification_c*>(symbol->array_specification);
if (specification != NULL)
symbol->array_specification->accept(*this);
}
break;
default:
return generate_c_typedecl_c::visit(symbol);
break;
}
return NULL;
}
/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */
void *visit(array_specification_c *symbol) {
switch (current_mode) {
case arrayname_im:
{
std::map<std::string,int>::iterator definition;
current_array_name = "__";
symbol->non_generic_type_name->accept(*this);
symbol->array_subrange_list->accept(*this);
definition = inline_array_defined.find(current_array_name);
if (definition == inline_array_defined.end()) {
current_mode = arraydeclaration_im;
s4o_incl.print("__DECLARE_ARRAY_TYPE(");
s4o_incl.print(current_array_name);
s4o_incl.print(",");
symbol->non_generic_type_name->accept(*this);
s4o_incl.print(",");
symbol->array_subrange_list->accept(*this);
s4o_incl.print(")\n\n");
inline_array_defined[current_array_name] = 0;
}
}
break;
default:
return generate_c_typedecl_c::visit(symbol);
break;
}
return NULL;
}
/* signed_integer DOTDOT signed_integer */
//SYM_REF2(subrange_c, lower_limit, upper_limit)
void *visit(subrange_c *symbol) {
int dimension = extract_integer_value(symbol->upper_limit) - extract_integer_value(symbol->lower_limit) + 1;
switch (current_mode) {
case arrayname_im:
current_array_name += "_";
{
std::stringstream ss;
ss << dimension;
current_array_name += ss.str();
}
break;
case arraydeclaration_im:
s4o_incl.print("[");
s4o_incl.print_integer(dimension);
s4o_incl.print("]");
default:
generate_c_typedecl_c::visit(symbol);
break;
}
return NULL;
}
/* var1_list ':' initialized_structure */
// SYM_REF2(structured_var_init_decl_c, var1_list, initialized_structure)
void *visit(structured_var_init_decl_c *symbol) {
return NULL;
}
/* fb_name_list ':' function_block_type_name ASSIGN structure_initialization */
/* structure_initialization -> may be NULL ! */
void *visit(fb_name_decl_c *symbol) {
return NULL;
}
/* VAR_OUTPUT [RETAIN | NON_RETAIN] var_init_decl_list END_VAR */
/* option -> may be NULL ! */
void *visit(output_declarations_c *symbol) {
symbol->var_init_decl_list->accept(*this);
return NULL;
}
/* VAR_IN_OUT var_declaration_list END_VAR */
void *visit(input_output_declarations_c *symbol) {
symbol->var_declaration_list->accept(*this);
return NULL;
}
/* var1_list ':' array_specification */
//SYM_REF2(array_var_declaration_c, var1_list, array_specification)
void *visit(array_var_declaration_c *symbol) {
array_specification_c *specification = dynamic_cast<array_specification_c*>(symbol->array_specification);
if (specification != NULL) {
current_mode = arrayname_im;
symbol->array_specification->accept(*this);
current_mode = none_im;
}
return NULL;
}
/* VAR [CONSTANT] var_init_decl_list END_VAR */
/* option -> may be NULL ! */
/* helper symbol for input_declarations */
void *visit(var_declarations_c *symbol) {
symbol->var_init_decl_list->accept(*this);
return NULL;
}
/* VAR RETAIN var_init_decl_list END_VAR */
void *visit(retentive_var_declarations_c *symbol) {
symbol->var_init_decl_list->accept(*this);
return NULL;
}
/* VAR [CONSTANT|RETAIN|NON_RETAIN] located_var_decl_list END_VAR */
/* option -> may be NULL ! */
//SYM_REF2(located_var_declarations_c, option, located_var_decl_list)
void *visit(located_var_declarations_c *symbol) {
symbol->located_var_decl_list->accept(*this);
return NULL;
}
/* [variable_name] location ':' located_var_spec_init */
/* variable_name -> may be NULL ! */
//SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
void *visit(located_var_decl_c *symbol) {
array_spec_init_c* array_spec_init = dynamic_cast<array_spec_init_c*>(symbol->located_var_spec_init);
if (array_spec_init != NULL) {
current_mode = arrayname_im;
symbol->located_var_spec_init->accept(*this);
current_mode = none_im;
}
return NULL;
}
/*| VAR_EXTERNAL [CONSTANT] external_declaration_list END_VAR */
/* option -> may be NULL ! */
//SYM_REF2(external_var_declarations_c, option, external_declaration_list)
void *visit(external_var_declarations_c *symbol) {
symbol->external_declaration_list->accept(*this);
return NULL;
}
/* global_var_name ':' (simple_specification|subrange_specification|enumerated_specification|array_specification|prev_declared_structure_type_name|function_block_type_name */
//SYM_REF2(external_declaration_c, global_var_name, specification)
void *visit(external_declaration_c *symbol) {
array_specification_c* array_specification = dynamic_cast<array_specification_c*>(symbol->specification);
if (array_specification != NULL) {
current_mode = arrayname_im;
symbol->specification->accept(*this);
current_mode = none_im;
}
return NULL;
}
/*| VAR_GLOBAL [CONSTANT|RETAIN] global_var_decl_list END_VAR */
/* option -> may be NULL ! */
// SYM_REF2(global_var_declarations_c, option, global_var_decl_list)
void *visit(global_var_declarations_c *symbol) {
symbol->global_var_decl_list->accept(*this);
return NULL;
}
/*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
/* type_specification ->may be NULL ! */
// SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
void *visit(global_var_decl_c *symbol) {
array_spec_init_c* array_spec_init = dynamic_cast<array_spec_init_c*>(symbol->type_specification);
if (array_spec_init != NULL) {
current_mode = arrayname_im;
symbol->type_specification->accept(*this);
current_mode = none_im;
}
return NULL;
}
void *visit(function_var_decls_c *symbol) {
symbol->decl_list->accept(*this);
return NULL;
}
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
/* VAR_TEMP temp_var_decl_list END_VAR */
void *visit(temp_var_decls_c *symbol) {
symbol->var_decl_list->accept(*this);
return NULL;
}
/* VAR NON_RETAIN var_init_decl_list END_VAR */
void *visit(non_retentive_var_decls_c *symbol) {
symbol->var_decl_list->accept(*this);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_pous_c: public generate_c_typedecl_c {
private:
stage4out_c *s4o_ptr;
public:
generate_c_pous_c(stage4out_c *s4o_ptr, stage4out_c *s4o_incl_ptr)
: generate_c_typedecl_c(s4o_ptr, s4o_incl_ptr) {
generate_c_pous_c::s4o_ptr = s4o_ptr;
};
virtual ~generate_c_pous_c(void) {}
private:
void print_end_of_block_label(void) {
/* Print and __end label for return statements!
* If label is not used by at least one goto, compiler will generate a warning.
* To work around this we introduce the useless goto.
*/
s4o.print("\n");
s4o.print(s4o.indent_spaces);
s4o.print("/* to humour the compiler, we insert a goto */\n");
s4o.print(s4o.indent_spaces);
s4o.print("goto ");
s4o.print(END_LABEL);
s4o.print(";\n");
s4o.indent_left();
/* write the label marking the end of the code block */
/* please see the comment before the RET_operator_c visitor for details... */
/* also needed for return_statement_c */
s4o.print("\n");
s4o.print(s4o.indent_spaces);
s4o.print(END_LABEL);
s4o.print(":\n");
s4o.indent_right();
}
public:
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {s4o_ptr->enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o_ptr->disable_output(); return NULL;}
/*************************/
/* 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");
/* (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 |
generate_c_vardecl_c::en_vt |
generate_c_vardecl_c::eno_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::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::eno_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;
initialization_analyzer_c initialization_analyzer(default_value);
switch (initialization_analyzer.get_initialization_type()) {
case initialization_analyzer_c::struct_it:
{
generate_c_structure_initialization_c *structure_initialization = new generate_c_structure_initialization_c(&s4o);
structure_initialization->init_structure_default(symbol->type_name);
structure_initialization->init_structure_values(default_value);
delete structure_initialization;
}
break;
case initialization_analyzer_c::array_it:
{
generate_c_array_initialization_c *array_initialization = new generate_c_array_initialization_c(&s4o);
array_initialization->init_array_size(symbol->type_name);
array_initialization->init_array_values(default_value);
delete array_initialization;
}
break;
default:
default_value->accept(*this);
break;
}
}
s4o.print(";\n\n");
s4o.print(s4o.indent_spaces + "// Control execution\n");
s4o.print(s4o.indent_spaces + "if (!EN) {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces + "if (__ENO != NULL) {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces + "*__ENO = __BOOL_LITERAL(FALSE);\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
s4o.print(s4o.indent_spaces + "return ");
symbol->derived_function_name->accept(*this);
s4o.print(";\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
/* (C) Function body */
generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol->derived_function_name, symbol);
symbol->function_body->accept(generate_c_code);
print_end_of_block_label();
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::foutputassign_vf,
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::eno_vt);
vardecl->print(symbol->var_declarations_list);
delete vardecl;
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;
generate_c_typedecl_c *typedecl;
generate_c_inlinefcall_c *inlinedecl;
TRACE("function_block_declaration_c");
/* (A) Function Block data structure declaration... */
typedecl = new generate_c_typedecl_c(&s4o_incl);
/* (A.1) Data structure declaration */
s4o_incl.print("// FUNCTION_BLOCK ");
symbol->fblock_name->accept(*typedecl);
s4o_incl.print("\n// Data part\n");
s4o_incl.print("typedef struct {\n");
s4o_incl.indent_right();
/* (A.2) Public variables: i.e. the function parameters... */
s4o_incl.print(s4o_incl.indent_spaces + "// FB Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o_incl,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::en_vt |
generate_c_vardecl_c::eno_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
s4o_incl.print("\n");
/* (A.3) Private internal variables */
s4o_incl.print(s4o_incl.indent_spaces + "// FB private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o_incl,
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_incl, symbol);
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::sfcdecl_sd);
delete sfcdecl;
s4o_incl.print("\n");
/* (A.5) Function Block data structure type name. */
s4o_incl.indent_left();
s4o_incl.print("} ");
symbol->fblock_name->accept(*typedecl);
s4o_incl.print(";\n\n");
delete typedecl;
/* (A.6) Function Block inline function declaration for function invocation */
inlinedecl = new generate_c_inlinefcall_c(&s4o, symbol->fblock_name, symbol, FB_FUNCTION_PARAM"->");
symbol->fblock_body->accept(*inlinedecl);
delete inlinedecl;
/* (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(", BOOL retain) {\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 |
generate_c_vardecl_c::en_vt |
generate_c_vardecl_c::eno_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
/* (B.3) Generate private internal variables for SFC */
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::sfcinit_sd);
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
/* (C) Function with FB body */
/* (C.1) Step definitions */
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::stepdef_sd);
/* (C.2) Action definitions */
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::actiondef_sd);
/* (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();
s4o.print(s4o.indent_spaces + "// Control execution\n");
s4o.print(s4o.indent_spaces + "if (!");
s4o.print(GET_VAR);
s4o.print("(");
s4o.print(FB_FUNCTION_PARAM);
s4o.print("->EN)) {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces);
s4o.print(SET_VAR);
s4o.print("(");
s4o.print(FB_FUNCTION_PARAM);
s4o.print("->,ENO,__BOOL_LITERAL(FALSE));\n");
s4o.print(s4o.indent_spaces + "return;\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
s4o.print(s4o.indent_spaces + "else {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces);
s4o.print(SET_VAR);
s4o.print("(");
s4o.print(FB_FUNCTION_PARAM);
s4o.print("->,ENO,__BOOL_LITERAL(TRUE));\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
/* (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->fblock_name, symbol, FB_FUNCTION_PARAM"->");
symbol->fblock_body->accept(generate_c_code);
print_end_of_block_label();
s4o.print(s4o.indent_spaces + "return;\n");
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->generate(symbol->fblock_body, generate_c_sfcdecl_c::stepundef_sd);
/* (C.7) Action undefinitions */
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::actionundef_sd);
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;
generate_c_typedecl_c *typedecl;
generate_c_inlinefcall_c *inlinedecl;
TRACE("program_declaration_c");
/* (A) Program data structure declaration... */
typedecl = new generate_c_typedecl_c(&s4o_incl);
/* (A.1) Data structure declaration */
s4o_incl.print("// PROGRAM ");
symbol->program_type_name->accept(*typedecl);
s4o_incl.print("\n// Data part\n");
s4o_incl.print("typedef struct {\n");
s4o_incl.indent_right();
/* (A.2) Public variables: i.e. the program parameters... */
s4o_incl.print(s4o_incl.indent_spaces + "// PROGRAM Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o_incl,
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_incl.print("\n");
/* (A.3) Private internal variables */
s4o_incl.print(s4o_incl.indent_spaces + "// PROGRAM private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o_incl,
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_incl, symbol);
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::sfcdecl_sd);
delete sfcdecl;
s4o_incl.print("\n");
/* (A.5) Program data structure type name. */
s4o_incl.indent_left();
s4o_incl.print("} ");
symbol->program_type_name->accept(*typedecl);
s4o_incl.print(";\n\n");
delete typedecl;
/* (A.6) Function Block inline function declaration for function invocation */
inlinedecl = new generate_c_inlinefcall_c(&s4o, symbol->program_type_name, symbol, FB_FUNCTION_PARAM"->");
symbol->function_block_body->accept(*inlinedecl);
delete inlinedecl;
/* (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(", BOOL retain) {\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");
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
/* (B.3) Generate private internal variables for SFC */
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::sfcinit_sd);
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
/* (C) Function with PROGRAM body */
/* (C.1) Step definitions */
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::stepdef_sd);
/* (C.2) Action definitions */
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::actiondef_sd);
/* (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->program_type_name, symbol, FB_FUNCTION_PARAM"->");
symbol->function_block_body->accept(generate_c_code);
print_end_of_block_label();
s4o.print(s4o.indent_spaces + "return;\n");
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->generate(symbol->function_block_body, generate_c_sfcdecl_c::stepundef_sd);
/* (C.7) Action undefinitions */
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::actionundef_sd);
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 {
private:
stage4out_c *s4o_ptr;
stage4out_c *s4o_incl_ptr;
public:
generate_c_config_c(stage4out_c *s4o_ptr, stage4out_c *s4o_incl_ptr)
: generate_c_typedecl_c(s4o_ptr, s4o_incl_ptr) {
generate_c_config_c::s4o_ptr = s4o_ptr;
generate_c_config_c::s4o_incl_ptr = s4o_incl_ptr;
};
virtual ~generate_c_config_c(void) {}
typedef enum {
initprotos_dt,
initdeclare_dt,
runprotos_dt,
rundeclare_dt
} declaretype_t;
declaretype_t wanted_declaretype;
public:
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {
s4o_ptr->enable_output();
s4o_incl_ptr->enable_output();
return NULL;
}
void *visit(disable_code_generation_pragma_c * symbol) {
s4o_ptr->disable_output();
s4o_incl_ptr->disable_output();
return NULL;
}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
/*
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");
s4o.print("#include \"accessor.h\"\n\n");
s4o.print("#include \"POUS.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,
symbol->configuration_name);
vardecl->print(symbol);
delete vardecl;
s4o.print("\n");
/* (A.3) Declare global prototypes in include file */
vardecl = new generate_c_vardecl_c(&s4o_incl,
generate_c_vardecl_c::globalprototype_vf,
generate_c_vardecl_c::global_vt,
symbol->configuration_name);
vardecl->print(symbol);
delete vardecl;
s4o_incl.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();
s4o.print(s4o.indent_spaces);
s4o.print("BOOL retain;\n");
s4o.print(s4o.indent_spaces);
s4o.print("retain = 0;\n");
/* (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,
symbol->configuration_name);
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("(unsigned long 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("(unsigned long 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("(unsigned long 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_configuration;
symbol_c *current_resource_name;
symbol_c *current_task_name;
symbol_c *current_global_vars;
bool configuration_name;
stage4out_c *s4o_ptr;
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) {
current_configuration = config_scope;
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_task_name = NULL;
current_global_vars = NULL;
configuration_name = false;
generate_c_resources_c::s4o_ptr = s4o_ptr;
};
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;
/* the qualifier of variables that need to be processed... */
static const unsigned int none_vq = 0x0000;
static const unsigned int constant_vq = 0x0001; // CONSTANT
static const unsigned int retain_vq = 0x0002; // RETAIN
static const unsigned int non_retain_vq = 0x0004; // NON_RETAIN
/* variable used to store the qualifier of program currently being processed... */
unsigned int current_varqualifier;
void *print_retain(void) {
s4o.print(",");
switch (current_varqualifier) {
case retain_vq:
s4o.print("1");
break;
case non_retain_vq:
s4o.print("0");
break;
default:
s4o.print("retain");
break;
}
return NULL;
}
/*************************/
/* B.1 - Common elements */
/*************************/
/*******************************************/
/* B 1.1 - Letters, digits and identifiers */
/*******************************************/
void *visit(identifier_c *symbol) {
if (configuration_name)
s4o.print(symbol->value);
else
generate_c_base_c::visit(symbol);
return NULL;
}
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {s4o_ptr->enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o_ptr->disable_output(); return NULL;}
/******************************************/
/* B 1.4.3 - Declaration & Initialisation */
/******************************************/
void *visit(constant_option_c *symbol) {
current_varqualifier = constant_vq;
return NULL;
}
void *visit(retain_option_c *symbol) {
current_varqualifier = retain_vq;
return NULL;
}
void *visit(non_retain_option_c *symbol) {
current_varqualifier = non_retain_vq;
return NULL;
}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(configuration_declaration_c *symbol) {
return symbol->configuration_name->accept(*this);
}
/*
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\n");
s4o.print("extern unsigned long long common_ticktime__;\n\n");
s4o.print("#include \"accessor.h\"\n");
s4o.print("#include \"POUS.h\"\n\n");
s4o.print("#include \"");
configuration_name = true;
current_configuration->accept(*this);
configuration_name = false;
s4o.print(".h\"\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,
current_resource_name);
vardecl->print(current_global_vars);
delete vardecl;
s4o.print("\n");
}
/* (A.3) POUs inclusion */
s4o.print("#include \"POUS.c\"\n\n");
wanted_declaretype = declare_dt;
/* (A.4) Resource programs declaration... */
symbol->task_configuration_list->accept(*this);
/* (A.5) Resource programs declaration... */
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();
s4o.print(s4o.indent_spaces);
s4o.print("BOOL retain;\n");
s4o.print(s4o.indent_spaces);
s4o.print("retain = 0;\n");
/* (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,
current_resource_name);
vardecl->print(current_global_vars);
delete vardecl;
}
s4o.print("\n");
wanted_declaretype = init_dt;
/* (B.3) Tasks initialisations... */
symbol->task_configuration_list->accept(*this);
/* (B.4) Resource programs initialisations... */
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("(unsigned long tick) {\n");
s4o.indent_right();
wanted_declaretype = run_dt;
/* (C.2) Task management... */
symbol->task_configuration_list->accept(*this);
/* (C.3) Program run declaration... */
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) {
switch (wanted_declaretype) {
case declare_dt:
s4o.print(s4o.indent_spaces);
symbol->program_type_name->accept(*this);
s4o.print(" ");
current_resource_name->accept(*this);
s4o.print("__");
symbol->program_name->accept(*this);
s4o.print(";\n#define ");
symbol->program_name->accept(*this);
s4o.print(" ");
current_resource_name->accept(*this);
s4o.print("__");
symbol->program_name->accept(*this);
s4o.print("\n");
break;
case init_dt:
if (symbol->retain_option != NULL)
symbol->retain_option->accept(*this);
s4o.print(s4o.indent_spaces);
symbol->program_type_name->accept(*this);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(&");
symbol->program_name->accept(*this);
print_retain();
s4o.print(");\n");
break;
case 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");
}
break;
default:
break;
}
return NULL;
}
/* TASK task_name task_initialization */
//SYM_REF2(task_configuration_c, task_name, task_initialization)
void *visit(task_configuration_c *symbol) {
current_task_name = symbol->task_name;
switch (wanted_declaretype) {
case declare_dt:
s4o.print(s4o.indent_spaces + "BOOL ");
current_task_name->accept(*this);
s4o.print(";\n");
symbol->task_initialization->accept(*this);
break;
case init_dt:
s4o.print(s4o.indent_spaces);
current_task_name->accept(*this);
s4o.print(" = __BOOL_LITERAL(FALSE);\n");
symbol->task_initialization->accept(*this);
break;
case run_dt:
symbol->task_initialization->accept(*this);
break;
default:
break;
}
current_task_name = NULL;
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) {
switch (wanted_declaretype) {
case declare_dt:
if (symbol->single_data_source != NULL) {
s4o.print(s4o.indent_spaces + "R_TRIG ");
current_task_name->accept(*this);
s4o.print("_R_TRIG;\n");
}
break;
case init_dt:
if (symbol->single_data_source != NULL) {
s4o.print(s4o.indent_spaces + "R_TRIG");
s4o.print(FB_INIT_SUFFIX);
s4o.print("(&");
current_task_name->accept(*this);
s4o.print("_R_TRIG, retain);\n");
}
break;
case run_dt:
if (symbol->single_data_source != NULL) {
symbol_c *config_var_decl = NULL;
symbol_c *res_var_decl = NULL;
s4o.print(s4o.indent_spaces + "{");
symbol_c *current_var_reference = ((global_var_reference_c *)(symbol->single_data_source))->global_var_name;
res_var_decl = search_resource_instance->get_decl(current_var_reference);
if (res_var_decl == NULL) {
config_var_decl = search_config_instance->get_decl(current_var_reference);
if (config_var_decl == NULL)
ERROR;
config_var_decl->accept(*this);
}
else {
res_var_decl->accept(*this);
}
s4o.print("* ");
symbol->single_data_source->accept(*this);
s4o.print(" = __GET_GLOBAL_");
symbol->single_data_source->accept(*this);
s4o.print("();");
s4o.print(SET_VAR);
s4o.print("(");
current_task_name->accept(*this);
s4o.print("_R_TRIG.,CLK, *");
symbol->single_data_source->accept(*this);
s4o.print(");}\n");
s4o.print(s4o.indent_spaces + "R_TRIG");
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(&");
current_task_name->accept(*this);
s4o.print("_R_TRIG);\n");
s4o.print(s4o.indent_spaces);
current_task_name->accept(*this);
s4o.print(" = ");
s4o.print(GET_VAR);
s4o.print("(");
current_task_name->accept(*this);
s4o.print("_R_TRIG.Q)");
}
else {
s4o.print(s4o.indent_spaces);
current_task_name->accept(*this);
s4o.print(" = ");
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));
s4o.print(")");
}
else
s4o.print("1");
}
else
s4o.print("1");
}
s4o.print(";\n");
break;
default:
break;
}
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(current_var_reference);
}
else
vartype = search_resource_instance->get_vartype(current_var_reference);
s4o.print(s4o.indent_spaces + "{extern ");
var_decl->accept(*this);
s4o.print(" *");
symbol->prog_data_source->accept(*this);
s4o.print("; ");
s4o.printupper(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(current_var_reference);
}
else
vartype = search_resource_instance->get_vartype(current_var_reference);
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.printupper(current_program_name);
s4o.print(".");
symbol->symbolic_variable->accept(*this);
s4o.print(";};\n");
}
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_c: public iterator_visitor_c {
public:
typedef enum {
none_gm,
datatypes_gm,
pous_gm,
} generate_mode_t;
protected:
stage4out_c &s4o;
stage4out_c pous_s4o;
stage4out_c pous_incl_s4o;
stage4out_c located_variables_s4o;
stage4out_c variables_s4o;
generate_c_datatypes_c generate_c_datatypes;
generate_c_pous_c generate_c_pous;
symbol_c *current_configuration;
const char *current_name;
const char *current_builddir;
unsigned long long common_ticktime;
generate_mode_t current_mode;
public:
generate_c_c(stage4out_c *s4o_ptr, const char *builddir):
s4o(*s4o_ptr),
pous_s4o(builddir, "POUS", "c"),
pous_incl_s4o(builddir, "POUS", "h"),
located_variables_s4o(builddir, "LOCATED_VARIABLES","h"),
variables_s4o(builddir, "VARIABLES","csv"),
generate_c_datatypes(&pous_s4o, &pous_incl_s4o),
generate_c_pous(&pous_s4o, &pous_incl_s4o) {
current_builddir = builddir;
current_configuration = NULL;
current_mode = none_gm;
}
~generate_c_c(void) {}
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {
s4o .enable_output();
pous_s4o .enable_output();
pous_incl_s4o .enable_output();
located_variables_s4o.enable_output();
variables_s4o .enable_output();
return NULL;
}
void *visit(disable_code_generation_pragma_c * symbol) {
s4o .disable_output();
pous_s4o .disable_output();
pous_incl_s4o .disable_output();
located_variables_s4o.disable_output();
variables_s4o .disable_output();
return NULL;
}
/***************************/
/* B 0 - Programming Model */
/***************************/
void *visit(library_c *symbol) {
pous_incl_s4o.print("#ifndef __POUS_H\n#define __POUS_H\n\n#include \"accessor.h\"\n\n");
current_mode = datatypes_gm;
for(int i = 0; i < symbol->n; i++) {
symbol->elements[i]->accept(*this);
}
current_mode = pous_gm;
for(int i = 0; i < symbol->n; i++) {
symbol->elements[i]->accept(*this);
}
pous_incl_s4o.print("#endif //__POUS_H\n");
generate_var_list_c generate_var_list(&variables_s4o, symbol);
generate_var_list.generate_programs(symbol);
generate_var_list.generate_variables(symbol);
variables_s4o.print("\n// Ticktime\n");
variables_s4o.print_long_long_integer(common_ticktime, false);
variables_s4o.print("\n");
generate_location_list_c generate_location_list(&located_variables_s4o);
symbol->accept(generate_location_list);
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 1.3.3 - Derived data types */
/********************************/
/* TYPE type_declaration_list END_TYPE */
void *visit(data_type_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
symbol->accept(generate_c_datatypes);
break;
default:
break;
}
return NULL;
}
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
symbol->var_declarations_list->accept(generate_c_datatypes);
break;
case pous_gm:
symbol->accept(generate_c_pous);
break;
default:
break;
}
return NULL;
}
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
void *visit(function_block_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
symbol->var_declarations->accept(generate_c_datatypes);
break;
case pous_gm:
symbol->accept(generate_c_pous);
break;
default:
break;
}
return NULL;
}
/**********************/
/* B 1.5.3 - Programs */
/**********************/
void *visit(program_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
symbol->var_declarations->accept(generate_c_datatypes);
break;
case pous_gm:
symbol->accept(generate_c_pous);
break;
default:
break;
}
return NULL;
}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(configuration_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
if (symbol->global_var_declarations != NULL)
symbol->global_var_declarations->accept(generate_c_datatypes);
break;
case pous_gm:
static int configuration_count = 0;
if (configuration_count++) {
/* the first configuration is the one we will use!! */
STAGE4_ERROR(symbol, symbol, "A previous CONFIGURATION has already been declared (C code generation currently only allows a single configuration).");
ERROR;
}
current_configuration = symbol;
{
calculate_common_ticktime_c calculate_common_ticktime;
symbol->accept(calculate_common_ticktime);
common_ticktime = calculate_common_ticktime.get_common_ticktime();
if (common_ticktime == 0) {
STAGE4_ERROR(symbol, symbol, "You must define at least one periodic task (to set cycle period)!");
ERROR;
}
symbol->configuration_name->accept(*this);
stage4out_c config_s4o(current_builddir, current_name, "c");
stage4out_c config_incl_s4o(current_builddir, current_name, "h");
generate_c_config_c generate_c_config(&config_s4o, &config_incl_s4o);
symbol->accept(generate_c_config);
config_s4o.print("unsigned long long common_ticktime__ = ");
config_s4o.print_long_long_integer(common_ticktime);
config_s4o.print("; /*ns*/\n");
config_s4o.print("unsigned long greatest_tick_count__ = ");
config_s4o.print_long_integer(calculate_common_ticktime.get_greatest_tick_count());
config_s4o.print("; /*tick*/\n");
}
symbol->resource_declarations->accept(*this);
current_configuration = NULL;
break;
default:
break;
}
return NULL;
}
void *visit(resource_declaration_c *symbol) {
switch (current_mode) {
case datatypes_gm:
if (symbol->global_var_declarations != NULL)
symbol->global_var_declarations->accept(generate_c_datatypes);
break;
case pous_gm:
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);
}
break;
default:
break;
}
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
switch (current_mode) {
case pous_gm:
{
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);
}
break;
default:
break;
}
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;}