/*
* 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)->const_value._##dtype.is_valid())
#define GET_CVALUE(dtype, symbol) ((symbol)->const_value._##dtype.get())
/***********************************************************************/
/* 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_FB "__DECLARE_GLOBAL_FB"
#define DECLARE_GLOBAL_LOCATION "__DECLARE_GLOBAL_LOCATION"
#define DECLARE_GLOBAL_LOCATED "__DECLARE_GLOBAL_LOCATED"
#define DECLARE_EXTERNAL "__DECLARE_EXTERNAL"
#define DECLARE_EXTERNAL_FB "__DECLARE_EXTERNAL_FB"
#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_FB "__INIT_GLOBAL_FB"
#define INIT_GLOBAL_LOCATED "__INIT_GLOBAL_LOCATED"
#define INIT_EXTERNAL "__INIT_EXTERNAL"
#define INIT_EXTERNAL_FB "__INIT_EXTERNAL_FB"
#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_EXTERNAL_FB "__GET_EXTERNAL_FB"
#define GET_LOCATED "__GET_LOCATED"
#define GET_VAR_REF "__GET_VAR_REF"
#define GET_EXTERNAL_REF "__GET_EXTERNAL_REF"
#define GET_EXTERNAL_FB_REF "__GET_EXTERNAL_FB_REF"
#define GET_LOCATED_REF "__GET_LOCATED_REF"
#define GET_VAR_DREF "__GET_VAR_DREF"
#define GET_EXTERNAL_DREF "__GET_EXTERNAL_DREF"
#define GET_EXTERNAL_FB_DREF "__GET_EXTERNAL_FB_DREF"
#define GET_LOCATED_DREF "__GET_LOCATED_DREF"
#define GET_VAR_BY_REF "__GET_VAR_BY_REF"
#define GET_EXTERNAL_BY_REF "__GET_EXTERNAL_BY_REF"
#define GET_EXTERNAL_FB_BY_REF "__GET_EXTERNAL_FB_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_EXTERNAL_FB "__SET_EXTERNAL_FB"
#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"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
static int generate_line_directives__ = 0;
static int generate_pou_filepairs__ = 0;
static int generate_plc_state_backup_fuctions__ = 0;
#ifdef __unix__
/* Parse command line options passed from main.c !! */
#include <stdlib.h> // for getsubopt()
int stage4_parse_options(char *options) {
enum {LINE_OPT = 0,
SEPTFILE_OPT,
BACKUP_OPT /* option to generate function to backup and restore internal PLC state */
/*, SOME_OTHER_OPT, YET_ANOTHER_OPT */};
char *const token[] = {
/* LINE_OPT*/(char *)"l",
/* SEPTFILE_OPT*/(char *)"p",
/* BACKUP_OPT*/(char *)"b",
/* SOME_OTHER_OPT, ... */
NULL };
/* unfortunately, the above commented out syntax for array initialization is valid in C, but not in C++ */
char *subopts = options;
char *value;
int opt;
while (*subopts != '\0') {
switch (getsubopt(&subopts, token, &value)) {
case LINE_OPT: generate_line_directives__ = 1; break;
case SEPTFILE_OPT: generate_pou_filepairs__ = 1; break;
case BACKUP_OPT: generate_plc_state_backup_fuctions__ = 1; break;
default : fprintf(stderr, "Unrecognized option: -O %s\n", value); return -1; break;
}
}
return 0;
}
void stage4_print_options(void) {
printf(" (options must be separated by commas. Example: 'l,w,x')\n");
printf(" l : insert '#line' directives in generated C code.\n");
printf(" p : place each POU in a separate pair of files (<pou_name>.c, <pou_name>.h).\n");
printf(" b : generate functions to backup and restore internal PLC state.\n");
}
#else /* not __unix__ */
/* getsubopt isn't supported with mingw,
* then stage4 options aren't available on windows*/
void stage4_print_options(void) {}
int stage4_parse_options(char *options) {return 0;}
#endif
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#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_and_typeid_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_and_typeid_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) {
{STAGE4_ERROR(symbol, symbol, "R_EDGE and F_EDGE declarations are not currently supported"); ERROR;}
/*
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, spec_init_sperator_c::get_spec(symbol->fb_spec_init));
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;}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/* A helper class that analyses if the datatype of a variable is 'complex'. */
/* 'complex' means that it is either a strcuture or an array! */
class analyse_variable_c: public search_visitor_c {
private:
static analyse_variable_c *singleton_;
public:
analyse_variable_c(void) {};
static bool is_complex_type(symbol_c *symbol) {
if (NULL == symbol) ERROR;
if (!get_datatype_info_c::is_type_valid (symbol->datatype)) return false;
return ( get_datatype_info_c::is_structure(symbol->datatype)
|| get_datatype_info_c::is_array (symbol->datatype)
);
}
private:
symbol_c *last_fb, *first_non_fb_identifier;
public:
/* returns the first element (from left to right) in a structured variable that is not a FB, i.e. is either a structure or an array! */
/* eg:
* fb1.fb2.fb3.real returns ??????
* fb1.fb2.struct1.real returns struct1
* struct1.real returns struct1
*/
static symbol_c *find_first_nonfb(symbol_c *symbol) {
if (NULL == singleton_) singleton_ = new analyse_variable_c();
if (NULL == singleton_) ERROR;
if (NULL == symbol) ERROR;
singleton_->last_fb = NULL;
singleton_->first_non_fb_identifier = NULL;
return (symbol_c *)symbol->accept(*singleton_);
}
/* returns true if a strcutured variable (e.g. fb1.fb2.strcut1.real) contains a structure or array */
/* eg:
* fb1.fb2.fb3.real returns FALSE
* fb1.fb2.struct1.real returns TRUE
* struct1.real returns TRUE
*/
static bool contains_complex_type(symbol_c *symbol) {
if (NULL == symbol) ERROR;
if (!get_datatype_info_c::is_type_valid(symbol->datatype)) ERROR;
symbol_c *first_non_fb = (symbol_c *)find_first_nonfb(symbol);
return is_complex_type(first_non_fb->datatype);
}
/* returns the datatype of the variable returned by find_first_nonfb() */
/* eg:
* fb1.fb2.fb3.real returns ??????
* fb1.fb2.struct1.real returns datatype of struct1
* struct1.real returns datatype of struct1
*/
static search_var_instance_decl_c::vt_t first_nonfb_vardecltype(symbol_c *symbol, symbol_c *scope) {
if (NULL == symbol) ERROR;
if (!get_datatype_info_c::is_type_valid(symbol->datatype)) ERROR;
symbol_c *first_non_fb = (symbol_c *)find_first_nonfb(symbol);
if (NULL != singleton_->last_fb) {
scope = singleton_->last_fb->datatype;
symbol = singleton_->first_non_fb_identifier;
}
search_var_instance_decl_c search_var_instance_decl(scope);
return search_var_instance_decl.get_vartype(symbol);
}
/*********************/
/* B 1.4 - Variables */
/*********************/
void *visit(symbolic_variable_c *symbol) {
if (!get_datatype_info_c::is_type_valid (symbol->datatype)) ERROR;
if (!get_datatype_info_c::is_function_block(symbol->datatype)) {
first_non_fb_identifier = symbol;
return (void *)symbol;
}
last_fb = symbol;
return NULL;
}
/*************************************/
/* B.1.4.2 Multi-element Variables */
/*************************************/
// SYM_REF2(structured_variable_c, record_variable, field_selector)
void *visit(structured_variable_c *symbol) {
symbol_c *res = (symbol_c *)symbol->record_variable->accept(*this);
if (NULL != res) return res;
if (!get_datatype_info_c::is_type_valid (symbol->datatype)) ERROR;
if (!get_datatype_info_c::is_function_block(symbol->datatype)) {
first_non_fb_identifier = symbol->field_selector;
return (void *)symbol;
}
last_fb = symbol;
return NULL;
}
/* subscripted_variable '[' subscript_list ']' */
//SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
void *visit(array_variable_c *symbol) {
void *res = symbol->subscripted_variable->accept(*this);
if (NULL != res) return res;
return (void *)symbol;
}
};
analyse_variable_c *analyse_variable_c::singleton_ = NULL;
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#include "generate_c_st.cc"
#include "generate_c_il.cc"
#include "generate_c_inlinefcall.cc"
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
#define MILLISECOND ((unsigned long long)1000000)
#define SECOND 1000 * MILLISECOND
#define ULL_MAX std::numeric_limits<unsigned long long>::max()
#define UL_MAX std::numeric_limits<uint32_t>::max()
/* unsigned long long -> multiply and add : time_var += interval * multiplier */
/* note: multiplier must be <> 0 due to overflow test */
#define ULL_MUL_ADD(time_var, interval, multiplier, overflow_flag) { \
/* Test overflow on MUL by pre-condition: If (ULL_MAX / a) < b => overflow! */ \
overflow_flag |= ((ULL_MAX / (multiplier)) < GET_CVALUE(uint64, interval)); \
/* Test overflow on ADD by pre-condition: If (ULL_MAX - a) < b => overflow! */ \
overflow_flag |= ((ULL_MAX - (GET_CVALUE(uint64, interval) * multiplier)) < time_var); \
time_var += GET_CVALUE(uint64, interval) * (multiplier); \
}
/* long double -> multiply and add : time_var += interval * multiplier */
#define LDB_MUL_ADD(time_var, interval, multiplier) { \
time_var += GET_CVALUE(real64, interval) * (multiplier); \
}
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;
bool ovflow = false;
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(uint64, interval->milliseconds)) ULL_MUL_ADD(time_ull, interval->milliseconds, MILLISECOND, ovflow)
else if (VALID_CVALUE(real64, interval->milliseconds)) LDB_MUL_ADD(time_ld , 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(uint64, interval->seconds )) ULL_MUL_ADD(time_ull, interval->seconds, SECOND, ovflow)
else if (VALID_CVALUE(real64, interval->seconds )) LDB_MUL_ADD(time_ld , 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(uint64, interval->minutes )) ULL_MUL_ADD(time_ull, interval->minutes, SECOND * 60, ovflow)
else if (VALID_CVALUE(real64, interval->minutes )) LDB_MUL_ADD(time_ld , 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(uint64, interval->hours )) ULL_MUL_ADD(time_ull, interval->hours, SECOND * 60 * 60, ovflow)
else if (VALID_CVALUE(real64, interval->hours )) LDB_MUL_ADD(time_ld , 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(uint64, interval->days )) ULL_MUL_ADD(time_ull, interval->days, SECOND * 60 * 60 * 24, ovflow)
else if (VALID_CVALUE(real64, interval->days )) LDB_MUL_ADD(time_ld , interval->days, SECOND * 60 * 60 * 24)
else ERROR; // if (NULL != interval->days) is true, then it must have a valid constant value!
}
/* Test overflow on ADD by pre-condition: If (ULL_MAX - a) < b => overflow! */
ovflow |= ((ULL_MAX - time_ull) < (unsigned long long)time_ld);
time_ull += time_ld;
if (ovflow) {
/* time is being stored in ns resolution (MILLISECOND #define is set to 1000000) */
/* time is being stored in unsigned long long (ISO C99 guarantees at least 64 bits) */
/* 2⁶64ns works out to around 584.5 years, assuming 365.25 days per year */
STAGE4_ERROR(symbol, symbol, "Internal overflow calculating task interval (must be < 584 years).");
}
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;
/* Tick overflow can't happen at 2^32 because it
* must align with task periods.
*
* Instead of overflowing naturaly at 2^32
* the overall periodicity of tasks scheduling
* is used to find the closest overflow lesser than 2^32
*
*/
/* after common_period ticks, all task period align again */
unsigned long common_period;
public:
calculate_common_ticktime_c(void){
common_ticktime = 0;
common_period = 1; /* first tick time equals single/first task period */
}
unsigned long long GCM(unsigned long long a, unsigned long long b) {
if(a >= b){
unsigned long long c = a % b;
if (c == 0)
return b;
else
return GCM(b, c);
} else {
return GCM(b, a);
}
}
bool update_ticktime(unsigned long long time) {
if (common_ticktime == 0)
common_ticktime = time;
else
common_ticktime = GCM(time, common_ticktime);
unsigned long task_period = (time / common_ticktime); /* in tick count */
/* New Common Period is
* Least Common Multiple of
* Previous Common Period and
* New task period
*
* LCM(a,b) = a*b/GCD(a,b)
*/
unsigned long long new_common_period =
common_period * task_period / GCM(common_period, task_period);
if(new_common_period >= UL_MAX){
return false;
} else {
common_period = new_common_period;
}
/* else if task period already divides common period,
* keep the same common period */
return true;
}
unsigned long long get_common_ticktime(void) {
return common_ticktime;
}
uint32_t get_greatest_tick_count(void) {
if (common_period == 1) {
return 0;
} else {
return UL_MAX - (UL_MAX % common_period);
}
}
/* TASK task_name task_initialization */
//SYM_REF2(task_configuration_c, task_name, task_initialization)
void *visit(task_initialization_c *symbol) {
if (symbol->interval_data_source != NULL) {
unsigned long long time = calculate_time(symbol->interval_data_source);
if(!update_ticktime(time)) {
/* time is being stored in ns resolution (MILLISECOND #define is set to 1000000) */
/* time is being stored in unsigned long long (ISO C99 guarantees at least 64 bits) */
/* 2⁶64ns works out to around 584.5 years, assuming 365.25 days per year */
STAGE4_ERROR(symbol, symbol, "Internal overflow calculating least common multiple of task intervals (must be < 584 years).");
}
}
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_pous_c {
/* NOTE: This is NOT a visistor class!!
*
* Actually, it does not even really need to be a class. It is simply a collection of similar functions!!
*/
private:
static void print_end_of_block_label(stage4out_c &s4o) {
/* 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();
}
/*************/
/* Functions */
/*************/
public:
/* NOTE: The following function will be called twice:
* 1st time: s4o will reference the .h file, and print_declaration=true
* Here, we generate the function prototypes...
* 2nd time: s4o will reference the .c file, and print_declaration=false
* Here we generate the source code!
*/
/* 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 */
static void handle_function(function_declaration_c *symbol, stage4out_c &s4o, bool print_declaration) {
generate_c_vardecl_c *vardecl = NULL;
generate_c_base_and_typeid_c print_base(&s4o);
TRACE("function_declaration_c");
/* (A) Function declaration... */
/* (A.1) Function return type */
s4o.print("// FUNCTION\n");
symbol->type_name->accept(print_base); /* return type */
s4o.print(" ");
/* (A.2) Function name */
symbol->derived_function_name->accept(print_base);
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(")");
/* If we only want the declaration/prototype, then return!! */
if (print_declaration)
{s4o.print(";\n"); return;}
/* continue generating the function definition/code... */
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! */
/* NOTE: matiec supports a non-standard syntax, in which functions do not return a value
* (declared as returning the special non-standard datatype VOID)
* e.g.: FUNCTION foo: VOID
* ...
* END_FUNCTION
*
* These functions cannot return any value, so they do not need a variable to
* store the return value.
* Note that any attemot to sto a value in the implicit variable
* e.g.: FUNCTION foo: VOID
* ...
* foo := 42;
* END_FUNCTION
* will always return a datatype incompatilibiyt error in stage 3 of matiec,
* so it is safe for stage 4 to assume that this return variable will never be needed
* if the function's return type is VOID.
*/
if (!get_datatype_info_c::is_VOID(symbol->type_name->datatype)) { // only print return variable if return datatype is not VOID
s4o.print(s4o.indent_spaces);
symbol->type_name->accept(print_base); /* return type */
s4o.print(" ");
symbol->derived_function_name->accept(print_base);
s4o.print(" = ");
{
/* get the default value of this variable's type */
symbol_c *default_value = type_initial_value_c::get(symbol->type_name);
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(print_base);
break;
}
}
}
s4o.print(";\n\n");
// Only generate the code that controls the execution of the function's body if the
// function contains a declaration of both the EN and ENO variables
search_var_instance_decl_c search_var(symbol);
identifier_c en_var("EN");
identifier_c eno_var("ENO");
if ( (search_var.get_vartype(& en_var) == search_var_instance_decl_c::input_vt)
&& (search_var.get_vartype(&eno_var) == search_var_instance_decl_c::output_vt)) {
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");
if (!get_datatype_info_c::is_VOID(symbol->type_name->datatype)) { // only print return variable if return datatype is not VOID
s4o.print(s4o.indent_spaces + "return ");
symbol->derived_function_name->accept(print_base);
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(s4o);
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;
if (!get_datatype_info_c::is_VOID(symbol->type_name->datatype)) { // only print 'return <fname>' if return datatype is not VOID
s4o.print(s4o.indent_spaces + "return ");
symbol->derived_function_name->accept(print_base);
s4o.print(";\n");
}
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n\n");
return;
}
/*******************/
/* Function Blocks */
/*******************/
public:
/* NOTE: The following function will be called twice:
* 1st time: s4o will reference the .h file, and print_declaration=true
* Here, we generate the function prototypes...
* 2nd time: s4o will reference the .c file, and print_declaration=false
* Here we generate the source code!
*/
/* 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)
static void handle_function_block(function_block_declaration_c *symbol, stage4out_c &s4o, bool print_declaration) {
generate_c_vardecl_c *vardecl;
generate_c_sfcdecl_c *sfcdecl;
generate_c_base_and_typeid_c print_base(&s4o);
TRACE("function_block_declaration_c");
/* (A) Function Block data structure declaration... */
if (print_declaration) {
/* (A.1) Data structure declaration */
s4o.print("// FUNCTION_BLOCK ");
symbol->fblock_name->accept(print_base);
s4o.print("\n// Data part\n");
s4o.print("typedef struct {\n");
s4o.indent_right();
/* (A.2) Public variables: i.e. the function parameters... */
s4o.print(s4o.indent_spaces + "// FB Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::en_vt |
generate_c_vardecl_c::eno_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
s4o.print("\n");
/* (A.3) Private internal variables */
s4o.print(s4o.indent_spaces + "// FB private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::temp_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
/* (A.4) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol);
sfcdecl->generate(symbol->fblock_body, generate_c_sfcdecl_c::sfcdecl_sd);
delete sfcdecl;
s4o.print("\n");
/* (A.5) Function Block data structure type name. */
s4o.indent_left();
s4o.print("} ");
symbol->fblock_name->accept(print_base);
s4o.print(";\n\n");
}
if (!print_declaration) {
/* (A.6) Function Block inline function declaration for function invocation */
generate_c_inlinefcall_c *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(print_base);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->fblock_name->accept(print_base);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(", BOOL retain)");
if (print_declaration) {
s4o.print(";\n");
} else {
s4o.print(" {\n");
s4o.indent_right();
/* (B.2) Member initializations... */
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt |
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");
/* (B.3) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
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);
delete sfcdecl;
}
/* (C.3) Function declaration */
s4o.print("// Code part\n");
/* function interface */
s4o.print("void ");
symbol->fblock_name->accept(print_base);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->fblock_name->accept(print_base);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(")");
if (print_declaration) {
s4o.print(";\n");
} else {
s4o.print(" {\n");
s4o.indent_right();
// Only generate the code that controls the execution of the function's body if the
// function contains a declaration of both the EN and ENO variables
search_var_instance_decl_c search_var(symbol);
identifier_c en_var("EN");
identifier_c eno_var("ENO");
if ( (search_var.get_vartype(& en_var) == search_var_instance_decl_c::input_vt)
&& (search_var.get_vartype(&eno_var) == search_var_instance_decl_c::output_vt)) {
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);
s4o.print(s4o.indent_spaces + "return;\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "} // ");
symbol->fblock_name->accept(print_base);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print(s4o.indent_spaces + "() \n\n");
/* (C.6) Step undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
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;
}
/************/
/* Programs */
/************/
public:
/* NOTE: The following function will be called twice:
* 1st time: s4o will reference the .h file, and print_declaration=true
* Here, we generate the function prototypes...
* 2nd time: s4o will reference the .c file, and print_declaration=false
* Here we generate the source code!
*/
/* 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)
static void handle_program(program_declaration_c *symbol, stage4out_c &s4o, bool print_declaration) {
generate_c_vardecl_c *vardecl;
generate_c_sfcdecl_c *sfcdecl;
generate_c_base_and_typeid_c print_base(&s4o);
TRACE("program_declaration_c");
/* (A) Program data structure declaration... */
if (print_declaration) {
/* (A.1) Data structure declaration */
s4o.print("// PROGRAM ");
symbol->program_type_name->accept(print_base);
s4o.print("\n// Data part\n");
s4o.print("typedef struct {\n");
s4o.indent_right();
/* (A.2) Public variables: i.e. the program parameters... */
s4o.print(s4o.indent_spaces + "// PROGRAM Interface - IN, OUT, IN_OUT variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
s4o.print("\n");
/* (A.3) Private internal variables */
s4o.print(s4o.indent_spaces + "// PROGRAM private variables - TEMP, private and located variables\n");
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::temp_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations);
delete vardecl;
/* (A.4) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol);
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::sfcdecl_sd);
delete sfcdecl;
s4o.print("\n");
/* (A.5) Program data structure type name. */
s4o.indent_left();
s4o.print("} ");
symbol->program_type_name->accept(print_base);
s4o.print(";\n\n");
}
if (!print_declaration) {
/* (A.6) Function Block inline function declaration for function invocation */
generate_c_inlinefcall_c *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(print_base);
s4o.print(FB_INIT_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->program_type_name->accept(print_base);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(", BOOL retain)");
if (print_declaration) {
s4o.print(";\n");
} else {
s4o.print(" {\n");
s4o.indent_right();
/* (B.2) Member initializations... */
s4o.print(s4o.indent_spaces);
vardecl = new generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::constructorinit_vf,
generate_c_vardecl_c::input_vt |
generate_c_vardecl_c::output_vt |
generate_c_vardecl_c::inoutput_vt |
generate_c_vardecl_c::private_vt |
generate_c_vardecl_c::located_vt |
generate_c_vardecl_c::external_vt);
vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
delete vardecl;
s4o.print("\n");
/* (B.3) Generate private internal variables for SFC */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
sfcdecl->generate(symbol->function_block_body, generate_c_sfcdecl_c::sfcinit_sd);
delete sfcdecl;
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n\n");
}
if (!print_declaration) {
/* (C) Function with PROGRAM body */
/* (C.1) Step definitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
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);
delete sfcdecl;
}
/* (C.3) Function declaration */
s4o.print("// Code part\n");
/* function interface */
s4o.print("void ");
symbol->program_type_name->accept(print_base);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print("(");
/* first and only parameter is a pointer to the data */
symbol->program_type_name->accept(print_base);
s4o.print(" *");
s4o.print(FB_FUNCTION_PARAM);
s4o.print(")");
if (print_declaration) {
s4o.print(";\n");
} else {
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);
s4o.print(s4o.indent_spaces + "return;\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "} // ");
symbol->program_type_name->accept(print_base);
s4o.print(FB_FUNCTION_SUFFIX);
s4o.print(s4o.indent_spaces + "() \n\n");
/* (C.6) Step undefinitions */
sfcdecl = new generate_c_sfcdecl_c(&s4o, symbol, FB_FUNCTION_PARAM"->");
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;
}
}; /* generate_c_pous_c */
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_config_c: public generate_c_base_and_typeid_c {
private:
stage4out_c &s4o_incl;
public:
generate_c_config_c(stage4out_c *s4o_ptr, stage4out_c *s4o_incl_ptr)
: generate_c_base_and_typeid_c(s4o_ptr), s4o_incl(*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.enable_output();
s4o_incl.enable_output();
return NULL;
}
void *visit(disable_code_generation_pragma_c * symbol) {
s4o.disable_output();
s4o_incl.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");
if (runtime_options.disable_implicit_en_eno) {
// If we are not generating the EN and ENO parameters for functions and FB,
// then make sure we use the standard library version compiled without these parameters too!
s4o.print("#ifndef DISABLE_EN_ENO_PARAMETERS\n");
s4o.print("#define DISABLE_EN_ENO_PARAMETERS\n");
s4o.print("#endif\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_base_and_typeid_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;
public:
generate_c_resources_c(stage4out_c *s4o_ptr, symbol_c *config_scope, symbol_c *resource_scope, unsigned long long time)
: generate_c_base_and_typeid_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;
};
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.enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o.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");
if (runtime_options.disable_implicit_en_eno) {
// If we are not generating the EN and ENO parameters for functions and FB,
// then make sure we use the standard library version compiled without these parameters too!
s4o.print("#ifndef DISABLE_EN_ENO_PARAMETERS\n");
s4o.print("#define DISABLE_EN_ENO_PARAMETERS\n");
s4o.print("#endif\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:
{ identifier_c *tmp_id = dynamic_cast<identifier_c*>(symbol->program_name);
if (NULL == tmp_id) ERROR;
current_program_name = tmp_id->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;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/*******************************************************/
/* Classes to generate the backup/restore functions... */
/*******************************************************/
#define RESTORE_ "_restore__"
#define BACKUP_ "_backup__"
/* class to generate the forward declaration of the XXXX_backup() and XXXX_restore()
* functions that will later (in the generated C source code) be defined
* to backup/restore the global state of each RESOURCE in the source code being compiled.
* The XXXX is actually the resource name!
*/
class generate_c_backup_resource_decl_c: public generate_c_base_and_typeid_c {
public:
generate_c_backup_resource_decl_c(stage4out_c *s4o_ptr)
: generate_c_base_and_typeid_c(s4o_ptr) {};
void *visit(resource_declaration_c *symbol) {
s4o.print(s4o.indent_spaces);
s4o.print("void ");
symbol->resource_name->accept(*this);
s4o.print("_backup__" "(void **buffer, int *maxsize);\n");
s4o.print(s4o.indent_spaces);
s4o.print("void ");
symbol->resource_name->accept(*this);
s4o.print("_restore__" "(void **buffer, int *maxsize);\n");
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
/* __Must__ not insert any code! */
/* sinlge resources will not create a specific function for the resource */
/* backup and restore opertions will be inserted together with the configuration! */
return NULL;
}
};
/* print out the begining of the generic backup/restore function */
void print_backup_restore_function_beg(stage4out_c &s4o, const char *func_name, const char *operation) {
/* operation will be either "_backup__" or "_restore__" */
s4o.print("\n");
s4o.print("void ");
s4o.print(func_name);
s4o.print(operation);
s4o.print("(void **buffer, int *maxsize) {\n");
s4o.indent_right();
// Don't save/restore the __CURRENT_TIME variable, as 'plc controller' has easy access to it
// and can therefore do the save/restore by itself.
//s4o.print(s4o.indent_spaces);
//s4o.print(operation);
//s4o.print("(&__CURRENT_TIME, sizeof(__CURRENT_TIME), buffer, maxsize);\n");
s4o.print(s4o.indent_spaces);
s4o.print("#define " DECLARE_GLOBAL "(vartype, domain, varname) \\\n ");
s4o.print(operation);
s4o.print("(&domain##__##varname, sizeof(domain##__##varname), buffer, maxsize);\n");
s4o.print(s4o.indent_spaces);
s4o.print("#define " DECLARE_GLOBAL_FB "(vartype, domain, varname) \\\n ");
s4o.print(operation);
s4o.print("(&domain##__##varname, sizeof(domain##__##varname), buffer, maxsize);\n");
s4o.print(s4o.indent_spaces);
s4o.print("#define " DECLARE_GLOBAL_LOCATION "(vartype, location) \\\n ");
s4o.print(operation);
s4o.print("(location, sizeof(*location), buffer, maxsize);\n");
s4o.print(s4o.indent_spaces);
s4o.print("#define " DECLARE_GLOBAL_LOCATED "(vartype, domain, varname) \\\n ");
s4o.print(operation);
s4o.print("(&domain##__##varname, sizeof(domain##__##varname), buffer, maxsize);\n");
}
/* print out the ending of the generic backup/restore function */
void print_backup_restore_function_end(stage4out_c &s4o) {
s4o.print(s4o.indent_spaces); s4o.print("#undef " DECLARE_GLOBAL "\n");
s4o.print(s4o.indent_spaces); s4o.print("#undef " DECLARE_GLOBAL_FB "\n");
s4o.print(s4o.indent_spaces); s4o.print("#undef " DECLARE_GLOBAL_LOCATION "\n");
s4o.print(s4o.indent_spaces); s4o.print("#undef " DECLARE_GLOBAL_LOCATED "\n");
s4o.indent_left();
s4o.print("}\n");
}
/* generate the backup/restore function for a RESOURCE */
/* the backup/restore function generated here will be called by the backup/restore
* function generated for the configuration in which the resource is embedded
*/
class generate_c_backup_resource_c: public generate_c_base_and_typeid_c {
public:
const char *operation;
generate_c_backup_resource_c(stage4out_c *s4o_ptr)
: generate_c_base_and_typeid_c(s4o_ptr) {
operation = NULL;
};
virtual ~generate_c_backup_resource_c(void) {}
private:
void print_forward_declarations(void) {
s4o.print("\n\n\n");
s4o.print("void ");
s4o.print("_backup__");
s4o.print("(void *varptr, int varsize, void **buffer, int *maxsize);\n");
s4o.print("void ");
s4o.print("_restore__");
s4o.print("(void *varptr, int varsize, void **buffer, int *maxsize);\n");
s4o.print("\n\n\n");
s4o.print("#undef " DECLARE_GLOBAL "\n");
s4o.print("#undef " DECLARE_GLOBAL_FB "\n");
s4o.print("#undef " DECLARE_GLOBAL_LOCATION "\n");
s4o.print("#undef " DECLARE_GLOBAL_LOCATED "\n");
}
public:
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {s4o.enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o.disable_output();return NULL;}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(resource_declaration_c *symbol) {
char *resource_name = strdup(symbol->resource_name->token->value);
/* convert to upper case */
for (char *c = resource_name; *c != '\0'; *c = toupper(*c), c++);
generate_c_vardecl_c vardecl = generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::global_vt,
symbol->resource_name);
print_forward_declarations();
print_backup_restore_function_beg(s4o, resource_name, "_backup__");
if (symbol->global_var_declarations != NULL)
vardecl.print(symbol->global_var_declarations);
if (symbol->resource_declaration != NULL) {
operation = "_backup__";
symbol->resource_declaration->accept(*this); // will call visit(single_resource_declaration_c *)
operation = NULL;
}
print_backup_restore_function_end(s4o);
print_backup_restore_function_beg(s4o, resource_name, "_restore__");
if (symbol->global_var_declarations != NULL)
vardecl.print(symbol->global_var_declarations);
if (symbol->resource_declaration != NULL) {
operation = "_restore__";
symbol->resource_declaration->accept(*this); // will call visit(single_resource_declaration_c *)
operation = NULL;
}
print_backup_restore_function_end(s4o);
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
/* Must store the declared/instatiated PROGRAMS */
if (symbol->program_configuration_list != NULL)
symbol->program_configuration_list->accept(*this);
return NULL;
}
/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
// SYM_REF5(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements)
void *visit(program_configuration_c *symbol) {
// generate the following source code:
// _xxxxxx__(&program_name, sizeof(program_name), buffer, maxsize);
s4o.print(s4o.indent_spaces);
s4o.print(operation); // call _restore__() or _backup__()
s4o.print("(&");
symbol->program_name->accept(*this);
s4o.print(", sizeof(");
symbol->program_name->accept(*this);
s4o.print("), buffer, maxsize);\n");
return NULL;
}
};
/* generate the backup/restore function for a CONFIGURATION */
/* the generated function will backup/restore the global variables declared in the
* configuration, and call the backup/restore functions of each embedded resource to do
* the same for the global variables declared inside each resource.
*
* The matiec compiler will now generate two additional functions which
* will backup and restore the PLC internal state to a void *buffer.
* config_backup__(void **buffer, int *maxsize)
* config_restore__(void **buffer, int *maxsize)
*
* Both functions will backup/restore the internal state from the memory
* pointed to by *buffer, up to a maximum of *maxsize bytes.
* Both functions will return with buffer pointing to the first unused
* byte in the buffer, and maxsize with the number of remaining bytes. If
* the buffer is not sufficient to store all the internal state, maxsize
* will return with a negative number, equal to the number of missing
* bytes.
*
* In other words, to know the exact size of the buffer required to store
* the PLC internal state, malloc() that memory, and do the backup:
* int maxsize = 0;
* config_backup__(NULL, &maxsize);
* void *buffer = malloc(-1 * maxsize);
* // and now to really back the internal state...
* config_backup__(&buffer, &maxsize);
*/
class generate_c_backup_config_c: public generate_c_base_and_typeid_c {
private:
const char *func_to_call; // parameter to pass data from: void *visit(configuration_declaration_c *)
// to: void *visit(resource_declaration_c *)
public:
generate_c_backup_config_c(stage4out_c *s4o_ptr)
: generate_c_base_and_typeid_c(s4o_ptr) {
func_to_call = NULL;
};
virtual ~generate_c_backup_config_c(void) {}
public:
/********************/
/* 2.1.6 - Pragmas */
/********************/
void *visit(enable_code_generation_pragma_c * symbol) {s4o.enable_output(); return NULL;}
void *visit(disable_code_generation_pragma_c * symbol) {s4o.disable_output();return NULL;}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
/*
SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused)
*/
void *visit(configuration_declaration_c *symbol) {
s4o.print("\n\n\n");
s4o.print("void ");
s4o.print("_backup__");
s4o.print("(void *varptr, int varsize, void **buffer, int *maxsize) {\n");
s4o.print(" if (varsize <= *maxsize) {memmove(*buffer, varptr, varsize); *buffer += varsize;}\n");
s4o.print(" *maxsize -= varsize;\n");
s4o.print("}\n");
s4o.print("void ");
s4o.print("_restore__");
s4o.print("(void *varptr, int varsize, void **buffer, int *maxsize) {\n");
s4o.print(" if (varsize <= *maxsize) {memmove(varptr, *buffer, varsize); *buffer += varsize;}\n");
s4o.print(" *maxsize -= varsize;\n");
s4o.print("}\n");
generate_c_vardecl_c vardecl = generate_c_vardecl_c(&s4o,
generate_c_vardecl_c::local_vf,
generate_c_vardecl_c::global_vt,
symbol->configuration_name);
s4o.print("\n\n\n");
s4o.print("#undef " DECLARE_GLOBAL "\n");
s4o.print("#undef " DECLARE_GLOBAL_FB "\n");
s4o.print("#undef " DECLARE_GLOBAL_LOCATION "\n");
s4o.print("#undef " DECLARE_GLOBAL_LOCATED "\n");
generate_c_backup_resource_decl_c declare_functions = generate_c_backup_resource_decl_c(&s4o);
symbol->resource_declarations->accept(declare_functions);
print_backup_restore_function_beg(s4o, "config", "_backup__");
vardecl.print(symbol);
s4o.print("\n");
func_to_call = "_backup__";
symbol->resource_declarations->accept(*this); // will call resource_declaration_list_c or single_resource_declaration_c
func_to_call = NULL;
print_backup_restore_function_end(s4o);
print_backup_restore_function_beg(s4o, "config", "_restore__");
vardecl.print(symbol);
s4o.print("\n");
func_to_call = "_restore__";
symbol->resource_declarations->accept(*this); // will call resource_declaration_list_c or single_resource_declaration_c
func_to_call = NULL;
print_backup_restore_function_end(s4o);
return NULL;
}
void *visit(resource_declaration_c *symbol) {
s4o.print(s4o.indent_spaces);
symbol->resource_name->accept(*this);
s4o.print(func_to_call);
s4o.print("(buffer, maxsize);\n");
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
/* If the configuration does not have any resources, we must store/restore the declared program instances
* inside the backup() restore() functions created for the configuration.
*/
generate_c_backup_resource_c handle_resource = generate_c_backup_resource_c(&s4o);
handle_resource.operation = func_to_call;
symbol->accept(handle_resource);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_c: public iterator_visitor_c {
protected:
stage4out_c &s4o;
stage4out_c pous_s4o;
stage4out_c pous_incl_s4o;
stage4out_c located_variables_s4o;
stage4out_c variables_s4o;
generate_c_typedecl_c generate_c_typedecl;
generate_c_implicit_typedecl_c generate_c_implicit_typedecl;
generate_c_pous_c generate_c_pous;
symbol_c *current_configuration;
const char *current_name;
const char *current_builddir;
bool allow_output;
unsigned long long common_ticktime;
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_typedecl (&pous_incl_s4o),
generate_c_implicit_typedecl(&pous_incl_s4o, &generate_c_typedecl)
{
current_builddir = builddir;
current_configuration = NULL;
allow_output = true;
}
~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();
allow_output = true;
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();
allow_output = false;
return NULL;
}
/***************************/
/* B 0 - Programming Model */
/***************************/
void *visit(library_c *symbol) {
pous_incl_s4o.print("#ifndef __POUS_H\n#define __POUS_H\n\n");
if (runtime_options.disable_implicit_en_eno) {
// If we are not generating the EN and ENO parameters for functions and FB,
// then make sure we use the standard library version compiled without these parameters too!
pous_incl_s4o.print("#ifndef DISABLE_EN_ENO_PARAMETERS\n");
pous_incl_s4o.print("#define DISABLE_EN_ENO_PARAMETERS\n");
pous_incl_s4o.print("#endif\n");
}
pous_incl_s4o.print("#include \"accessor.h\"\n#include \"iec_std_lib.h\"\n\n");
for(int i = 0; i < symbol->n; i++) {
symbol->get_element(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;}
/* In the derived datatype and POUs declarations, the names are stored as identfier_c, so the following visitors are not required! */
void *visit(derived_datatype_identifier_c *symbol) {ERROR; return NULL;}
void *visit( poutype_identifier_c *symbol) {ERROR; return NULL;}
/********************************/
/* B 1.3.3 - Derived data types */
/********************************/
/* TYPE type_declaration_list END_TYPE */
// void *visit(data_type_declaration_c *symbol) // handled by iterator_visitor_c
/* helper symbol for data_type_declaration */
void *visit(type_declaration_list_c *symbol) {
for(int i = 0; i < symbol->n; i++) {
symbol->get_element(i)->accept(generate_c_implicit_typedecl);
symbol->get_element(i)->accept(generate_c_typedecl);
}
return NULL;
}
/**************************************/
/* B.1.5 - Program organization units */
/**************************************/
/* WARNING: The following code is buggy when generating an independent pair of files for each POU, as the
* specially created stage4out_c (s4o_c and s4o_h) will not comply with the enable/disable_code_generation_pragma_c
*/
#define handle_pou(fname,pname) \
if (!allow_output) return NULL;\
if (generate_pou_filepairs__) {\
const char *pou_name = get_datatype_info_c::get_id_str(pname);\
stage4out_c s4o_c(current_builddir, pou_name, "c");\
stage4out_c s4o_h(current_builddir, pou_name, "h");\
s4o_c.print("#include \""); s4o_c.print(pou_name); s4o_c.print(".h\"\n");\
s4o_h.print("#ifndef __"); s4o_h.print(pou_name); s4o_h.print("_H\n");\
s4o_h.print("#define __"); s4o_h.print(pou_name); s4o_h.print("_H\n");\
generate_c_implicit_typedecl_c generate_c_implicit_typedecl__(&s4o_h);\
symbol->accept(generate_c_implicit_typedecl__); /* generate implicitly delcared datatypes (arrays and ref_to) */\
generate_c_pous_c::fname(symbol, s4o_h, true); /* generate the <pou_name>.h file */\
generate_c_pous_c::fname(symbol, s4o_c, false);/* generate the <pou_name>.c file */\
s4o_h.print("#endif /* __"); s4o_h.print(pou_name); s4o_h.print("_H */\n");\
/* add #include directives to the POUS.h and POUS.c files... */\
pous_incl_s4o.print("#include \"");\
pous_s4o. print("#include \"");\
pous_incl_s4o.print(pou_name);\
pous_s4o. print(pou_name);\
pous_incl_s4o.print(".h\"\n");\
pous_s4o. print(".c\"\n");\
} else {\
symbol->accept(generate_c_implicit_typedecl);\
generate_c_pous_c::fname(symbol, pous_incl_s4o, true);\
generate_c_pous_c::fname(symbol, pous_s4o, false);\
}
/***********************/
/* B 1.5.1 - Functions */
/***********************/
void *visit(function_declaration_c *symbol) {
handle_pou(handle_function,symbol->derived_function_name)
return NULL;
}
/*****************************/
/* B 1.5.2 - Function Blocks */
/*****************************/
void *visit(function_block_declaration_c *symbol) {
handle_pou(handle_function_block,symbol->fblock_name)
return NULL;
}
/**********************/
/* B 1.5.3 - Programs */
/**********************/
void *visit(program_declaration_c *symbol) {
handle_pou(handle_program,symbol->program_type_name)
return NULL;
}
/********************************/
/* B 1.7 Configuration elements */
/********************************/
void *visit(configuration_declaration_c *symbol) {
if (symbol->global_var_declarations != NULL)
symbol->global_var_declarations->accept(generate_c_implicit_typedecl);
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(" * ");
config_s4o.print_long_long_integer(1000000 / MILLISECOND);
config_s4o.print("; /*ns*/\n");
config_s4o.print("unsigned long greatest_tick_count__ = (unsigned long)");
config_s4o.print_long_integer(calculate_common_ticktime.get_greatest_tick_count());
config_s4o.print("; /*tick*/\n");
if (generate_plc_state_backup_fuctions__ > 0) {
generate_c_backup_config_c generate_backup = generate_c_backup_config_c(&config_s4o);
symbol->accept(generate_backup);
}
}
symbol->resource_declarations->accept(*this);
current_configuration = NULL;
return NULL;
}
void *visit(resource_declaration_c *symbol) {
if (symbol->global_var_declarations != NULL)
symbol->global_var_declarations->accept(generate_c_implicit_typedecl);
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);
if (generate_plc_state_backup_fuctions__ > 0) {
generate_c_backup_resource_c generate_backup = generate_c_backup_resource_c(&resources_s4o);
symbol->accept(generate_backup);
}
return NULL;
}
void *visit(single_resource_declaration_c *symbol) {
stage4out_c resources_s4o(current_builddir, "RESOURCE", "c");
generate_c_resources_c generate_c_resources(&resources_s4o, current_configuration, symbol, common_ticktime);
symbol->accept(generate_c_resources);
return NULL;
}
};
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
visitor_c *new_code_generator(stage4out_c *s4o, const char *builddir) {return new generate_c_c(s4o, builddir);}
void delete_code_generator(visitor_c *code_generator) {delete code_generator;}