Added double curly braces for pragma (kept single curly braces for compatibility). Added macro def and undef surrounding pragma to simplify user code. Moved useless comment from generated code back to code generator.
/*
* 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 "../../main.hh" // required for ERROR() and ERROR_MSG() macros.
#include "../stage4.hh"
//#define DEBUG
#ifdef DEBUG
#define TRACE(classname) printf("\n____%s____\n",classname);
#else
#define TRACE(classname)
#endif
#define STAGE4_ERROR(symbol1, symbol2, ...) {stage4err("while generating C code", symbol1, symbol2, __VA_ARGS__); exit(EXIT_FAILURE);}
/* Macros to access the constant value of each expression (if it exists) from the annotation introduced to the symbol_c object by constant_folding_c in stage3! */
#define VALID_CVALUE(dtype, symbol) (symbol_c::cs_const_value == (symbol)->const_value._##dtype.status)
#define GET_CVALUE(dtype, symbol) ((symbol)->const_value._##dtype.value)
/***********************************************************************/
/* 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
unsigned long long calculate_time(symbol_c *symbol) {
if (NULL == symbol) return 0;
interval_c *interval = dynamic_cast<interval_c *>(symbol);
duration_c *duration = dynamic_cast<duration_c *>(symbol);
if ((NULL == interval) && (NULL == duration))
{STAGE4_ERROR(symbol, symbol, "This type of interval value is not currently supported"); ERROR;}
if (NULL != duration) {
/* SYM_REF2(duration_c, neg, interval) */
if (duration->neg != NULL)
{STAGE4_ERROR(duration, duration, "Negative TIME literals for interval are not currently supported"); ERROR;}
return calculate_time(duration->interval);
}
if (NULL != interval) {
/* SYM_REF5(interval_c, days, hours, minutes, seconds, milliseconds) */
unsigned long long int time_ull = 0;
long double time_ld = 0;
/*
const unsigned long long int MILLISECOND = 1000000;
const unsigned long long int SECOND = 1000 * MILLISECOND
*/
if (NULL != interval->milliseconds) {
if (VALID_CVALUE( int64, interval->milliseconds) && GET_CVALUE( int64, interval->milliseconds) < 0) ERROR; // interval elements should always be positive!
if (VALID_CVALUE( int64, interval->milliseconds)) time_ull += GET_CVALUE( int64, interval->milliseconds) * MILLISECOND;
else if (VALID_CVALUE(uint64, interval->milliseconds)) time_ull += GET_CVALUE(uint64, interval->milliseconds) * MILLISECOND;
else if (VALID_CVALUE(real64, interval->milliseconds)) time_ld += GET_CVALUE(real64, interval->milliseconds) * MILLISECOND;
else ERROR; // if (NULL != interval->milliseconds) is true, then it must have a valid constant value!
}
if (NULL != interval->seconds ) {
if (VALID_CVALUE( int64, interval->seconds ) && GET_CVALUE( int64, interval->seconds ) < 0) ERROR; // interval elements should always be positive!
if (VALID_CVALUE( int64, interval->seconds )) time_ull += GET_CVALUE( int64, interval->seconds ) * SECOND;
else if (VALID_CVALUE(uint64, interval->seconds )) time_ull += GET_CVALUE(uint64, interval->seconds ) * SECOND;
else if (VALID_CVALUE(real64, interval->seconds )) time_ld += GET_CVALUE(real64, interval->seconds ) * SECOND;
else ERROR; // if (NULL != interval->seconds) is true, then it must have a valid constant value!
}
if (NULL != interval->minutes ) {
if (VALID_CVALUE( int64, interval->minutes ) && GET_CVALUE( int64, interval->minutes ) < 0) ERROR; // interval elements should always be positive!
if (VALID_CVALUE( int64, interval->minutes )) time_ull += GET_CVALUE( int64, interval->minutes ) * SECOND * 60;
else if (VALID_CVALUE(uint64, interval->minutes )) time_ull += GET_CVALUE(uint64, interval->minutes ) * SECOND * 60;
else if (VALID_CVALUE(real64, interval->minutes )) time_ld += GET_CVALUE(real64, interval->minutes ) * SECOND * 60;
else ERROR; // if (NULL != interval->minutes) is true, then it must have a valid constant value!
}
if (NULL != interval->hours ) {
if (VALID_CVALUE( int64, interval->hours ) && GET_CVALUE( int64, interval->hours ) < 0) ERROR; // interval elements should always be positive!
if (VALID_CVALUE( int64, interval->hours )) time_ull += GET_CVALUE( int64, interval->hours ) * SECOND * 60 * 60;
else if (VALID_CVALUE(uint64, interval->hours )) time_ull += GET_CVALUE(uint64, interval->hours ) * SECOND * 60 * 60;
else if (VALID_CVALUE(real64, interval->hours )) time_ld += GET_CVALUE(real64, interval->hours ) * SECOND * 60 * 60;
else ERROR; // if (NULL != interval->hours) is true, then it must have a valid constant value!
}
if (NULL != interval->days ) {
if (VALID_CVALUE( int64, interval->days ) && GET_CVALUE( int64, interval->days ) < 0) ERROR; // interval elements should always be positive!
if (VALID_CVALUE( int64, interval->days )) time_ull += GET_CVALUE( int64, interval->days ) * SECOND * 60 * 60 * 24;
else if (VALID_CVALUE(uint64, interval->days )) time_ull += GET_CVALUE(uint64, interval->days ) * SECOND * 60 * 60 * 24;
else if (VALID_CVALUE(real64, interval->days )) time_ld += GET_CVALUE(real64, interval->days ) * SECOND * 60 * 60 * 24;
else ERROR; // if (NULL != interval->days) is true, then it must have a valid constant value!
}
time_ull += time_ld;
return time_ull;
};
ERROR; // should never reach this point!
return 0; // humour the compiler!
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
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) {
unsigned long long time = calculate_time(symbol->interval_data_source);
if (time < 0) ERROR;
else 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) {
switch (current_mode) {
case arrayname_im:
current_array_name += "_";
{
std::stringstream ss;
ss << symbol->dimension;
current_array_name += ss.str();
}
break;
case arraydeclaration_im:
s4o_incl.print("[");
s4o_incl.print(symbol->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;
}
/* var1_list ':' structure_type_name */
//SYM_REF2(structured_var_declaration_c, var1_list, structure_type_name)
void *visit(structured_var_declaration_c *symbol) {
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");
/* to humour the compiler, we insert a goto */
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 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) {
unsigned long long int time = calculate_time(symbol->interval_data_source);
if (time != 0) {
s4o.print("!(tick % ");
s4o.print(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;}