--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/stage4/generate_c/generate_c.cc Wed Oct 24 17:39:51 2007 +0200
@@ -0,0 +1,1573 @@
+/*
+ * (c) 2003 Mario de Sousa
+ *
+ * Offered to the public under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2 of the
+ * License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
+ * Public License for more details.
+ *
+ * This code is made available on the understanding that it will not be
+ * used in safety-critical situations without a full and competent review.
+ */
+
+/*
+ * An IEC 61131-3 IL and ST compiler.
+ *
+ * Based on the
+ * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
+ *
+ */
+
+
+/*
+ * This is one of the versions available for the 4th stage.
+ *
+ * This 4th stage generates a c++ source program equivalent
+ * to the IL and ST code.
+ */
+
+
+
+
+
+
+// #include <stdio.h> /* required for NULL */
+#include <string>
+#include <iostream>
+#include <sstream>
+#include <typeinfo>
+
+#include "../../util/symtable.hh"
+#include "../../util/dsymtable.hh"
+#include "../../absyntax/visitor.hh"
+
+#include "../stage4.hh"
+
+
+
+
+
+
+
+
+//#define DEBUG
+#ifdef DEBUG
+#define TRACE(classname) printf("\n____%s____\n",classname);
+#else
+#define TRACE(classname)
+#endif
+
+
+
+#define ERROR error_exit(__FILE__,__LINE__)
+/* function defined in main.cc */
+extern void error_exit(const char *file_name, int line_no);
+
+
+
+
+
+
+
+/* A symbol table with all globally declared functions... */
+function_declaration_c null_symbol1(NULL,NULL,NULL,NULL);
+dsymtable_c<function_declaration_c *, &null_symbol1> function_symtable;
+
+/* A symbol table with all globally declared functions block types... */
+function_block_declaration_c null_symbol2(NULL,NULL,NULL);
+symtable_c<function_block_declaration_c *, &null_symbol2> function_block_type_symtable;
+
+/* A symbol table with all globally declared program types... */
+program_declaration_c null_symbol3(NULL,NULL,NULL);
+symtable_c<program_declaration_c *, &null_symbol3> program_type_symtable;
+
+/* A symbol table with all user declared type definitions... */
+/* Note that function block types and program types have their
+ * own symbol tables, so do not get placed in this symbol table!
+ */
+symbol_c null_symbol4;
+symtable_c<symbol_c *, &null_symbol4> type_symtable;
+
+
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+/* returns 0 if the names are equal!! */
+/* NOTE: it must ignore case!! */
+static int compare_identifiers(symbol_c *ident1, symbol_c *ident2) {
+
+ token_c *name1 = dynamic_cast<token_c *>(ident1);
+ token_c *name2 = dynamic_cast<token_c *>(ident2);
+
+ if ((name1 == NULL) || (name2 == NULL))
+ /* invalid identifiers... */
+ return -1;
+
+ if (strcasecmp(name1->value, name2->value) == 0)
+ return 0;
+
+ /* identifiers do not match! */
+ return 1;
+}
+
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+/* Unlike Programs and Configurations which get mapped onto C++ classes,
+ * Function Blocks are mapped onto a C structure containing the variables, and
+ * a C function containing the code in the FB's body. This is to allow direct allocation
+ * of a FB variable (which is really an instance of the C data structure) to
+ * a member of a union variable (note that classes with constructors cannot
+ * be mebers of a union), which is done in IL when loading a FB onto IL's
+ * default variable.
+ *
+ * So as not to clash the names of the C data structure and the C function,
+ * the C structure is given a name identical to that of the FB name, whereas
+ * the name of the function is the FB name with a constant string appended.
+ * The value of that constant string which is appended is defined in the following
+ * constant.
+ * In order not to clash with any variable in the IL and ST source codem the
+ * following constant should contain a double underscore, which is not allowed
+ * in IL and ST.
+ *
+ * e.g.: FUNTION_BLOCK TEST
+ * is mapped onto a TEST data structure, and a TEST_body__ function.
+ */
+
+#define FB_FUNCTION_SUFFIX "_body__"
+
+/* Idem as body, but for initializer FB function */
+#define FB_INIT_SUFFIX "_init__"
+
+/* Idem as body, but for run CONFIG and RESOURCE function */
+#define FB_RUN_SUFFIX "_run__"
+
+/* The FB body function is passed as the only parameter a pointer to the FB data
+ * structure instance. The name of this parameter is given by the following constant.
+ * In order not to clash with any variable in the IL and ST source codem the
+ * following constant should contain a double underscore, which is not allowed
+ * in IL and ST.
+ *
+ * e.g.: the body of FUNTION_BLOCK TEST
+ * is mapped onto the C function
+ * TEST_body__(TEST *data__)
+ */
+
+#define FB_FUNCTION_PARAM "data__"
+
+
+#define SFC_STEP_ACTION_PREFIX "__SFC_"
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+#include "spec_init_separator.cc"
+#include "function_param_iterator.cc"
+#include "function_call_iterator.cc"
+#include "function_call_param_iterator.cc"
+#include "type_initial_value.cc"
+#include "search_fb_instance_decl.cc"
+#include "search_base_type.cc"
+#include "search_var_instance_decl.cc"
+#include "decompose_var_instance_name.cc"
+#include "search_varfb_instance_type.cc"
+#include "search_constant_type.cc"
+#include "search_expression_type.cc"
+
+#include "generate_c_base.cc"
+#include "generate_c_typedecl.cc"
+#include "generate_c_sfcdecl.cc"
+#include "generate_c_vardecl.cc"
+#include "generate_c_configbody.cc"
+#include "generate_location_list.cc"
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+/* Generate a name for a temporary variable.
+ * Each new name generated is appended a different number,
+ * starting off from 0.
+ * After calling reset(), the names will start off again from 0.
+ */
+#define VAR_LEADER "__"
+#define TEMP_VAR VAR_LEADER "TMP_"
+#define SOURCE_VAR VAR_LEADER "SRC_"
+
+#include "generate_c_tempvardecl.cc"
+
+#include "generate_c_st.cc"
+#include "generate_c_il.cc"
+
+#include "generate_c.hh"
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+#define MILLISECOND 1000000
+#define SECOND 1000 * MILLISECOND
+
+/* A helper class that knows how to generate code for both the IL and ST languages... */
+class calculate_time_c: public iterator_visitor_c {
+ private:
+ unsigned long time;
+ float current_value;
+
+ public:
+ calculate_time_c(void){time = 0;};
+
+ unsigned long get_time(void) {return time;};
+
+ void *get_integer_value(token_c *token) {
+ std::string str = "";
+ for (unsigned int i = 0; i < strlen(token->value); i++)
+ if (token->value[i] != '_')
+ str += token->value[i];
+ current_value = atof(str.c_str());
+ return NULL;
+ }
+
+ void *get_float_value(token_c *token) {
+ current_value = atof(token->value);
+ return NULL;
+ }
+
+/******************************/
+/* B 1.2.1 - Numeric Literals */
+/******************************/
+
+ void *visit(integer_c *symbol) {return get_integer_value(symbol);}
+
+/************************/
+/* B 1.2.3.1 - Duration */
+/************************/
+
+ /* SYM_REF2(duration_c, neg, interval) */
+ void *visit(duration_c *symbol) {
+ if (symbol->neg != NULL)
+ ERROR;
+ symbol->interval->accept(*this);
+ return NULL;
+ }
+
+ /* SYM_TOKEN(fixed_point_c) */
+ void *visit(fixed_point_c *symbol) {return get_float_value(symbol);}
+
+ /* SYM_REF2(days_c, days, hours) */
+ void *visit(days_c *symbol) {
+ if (symbol->hours)
+ symbol->hours->accept(*this);
+ symbol->days->accept(*this);
+ time += (unsigned long)(current_value * 24 * 3600 * SECOND);
+ return NULL;
+ }
+
+ /* SYM_REF2(hours_c, hours, minutes) */
+ void *visit(hours_c *symbol) {
+ if (symbol->minutes)
+ symbol->minutes->accept(*this);
+ symbol->hours->accept(*this);
+ time += (unsigned long)(current_value * 3600 * SECOND);
+ return NULL;
+ }
+
+ /* SYM_REF2(minutes_c, minutes, seconds) */
+ void *visit(minutes_c *symbol) {
+ if (symbol->seconds)
+ symbol->seconds->accept(*this);
+ symbol->minutes->accept(*this);
+ time += (unsigned long)(current_value * 60 * SECOND);
+ return NULL;
+ }
+
+ /* SYM_REF2(seconds_c, seconds, milliseconds) */
+ void *visit(seconds_c *symbol) {
+ if (symbol->milliseconds)
+ symbol->milliseconds->accept(*this);
+ symbol->seconds->accept(*this);
+ time += (unsigned long)(current_value * SECOND);
+ return NULL;
+ }
+
+ /* SYM_REF2(milliseconds_c, milliseconds, unused) */
+ void *visit(milliseconds_c *symbol) {
+ symbol->milliseconds->accept(*this);
+ time += (unsigned long)(current_value * MILLISECOND);
+ return NULL;
+ }
+};
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+class calculate_common_ticktime_c: public iterator_visitor_c {
+ private:
+ unsigned long common_ticktime;
+
+ public:
+ calculate_common_ticktime_c(void){common_ticktime = 0;}
+
+ unsigned long euclide(unsigned long a, unsigned long b) {
+ unsigned long c = a % b;
+ if (c == 0)
+ return b;
+ else
+ return euclide(b, c);
+ }
+
+ void update_ticktime(unsigned long time) {
+ if (common_ticktime == 0)
+ common_ticktime = time;
+ else if (time > common_ticktime)
+ common_ticktime = euclide(time, common_ticktime);
+ else
+ common_ticktime = euclide(common_ticktime, time);
+ }
+
+ unsigned long get_ticktime(void) {
+ return common_ticktime;
+ }
+
+/* TASK task_name task_initialization */
+//SYM_REF2(task_configuration_c, task_name, task_initialization)
+ void *visit(task_initialization_c *symbol) {
+ calculate_time_c calculate_time;
+ unsigned long time = 0;
+ if (symbol->interval_data_source != NULL) {
+ symbol->interval_data_source->accept(calculate_time);
+ time = calculate_time.get_time();
+ }
+ if (time > 0)
+ update_ticktime(time);
+ return NULL;
+ }
+};
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+/* A helper class that knows how to generate code for both the IL and ST languages... */
+class generate_c_SFC_IL_ST_c: public null_visitor_c {
+ private:
+ stage4out_c *s4o_ptr;
+ symbol_c *scope;
+ const char *variable_prefix;
+
+ public:
+ generate_c_SFC_IL_ST_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix = NULL);
+ /*********************************************/
+ /* B.1.6 Sequential function chart elements */
+ /*********************************************/
+
+ /*| sequential_function_chart sfc_network*/
+ void *visit(sequential_function_chart_c * symbol);
+
+ /****************************************/
+ /* B.2 - Language IL (Instruction List) */
+ /****************************************/
+
+ /***********************************/
+ /* B 2.1 Instructions and Operands */
+ /***********************************/
+ /*| instruction_list il_instruction */
+ void *visit(instruction_list_c *symbol);
+
+ /* Remainder implemented in generate_c_il_c... */
+
+ /***************************************/
+ /* B.3 - Language ST (Structured Text) */
+ /***************************************/
+ /***********************/
+ /* B 3.1 - Expressions */
+ /***********************/
+ /* Implemented in generate_c_st_c */
+
+ /********************/
+ /* B 3.2 Statements */
+ /********************/
+ void *visit(statement_list_c *symbol);
+
+/* Remainder implemented in generate_c_st_c... */
+};
+
+#include "generate_c_sfc.cc"
+
+generate_c_SFC_IL_ST_c::generate_c_SFC_IL_ST_c(stage4out_c *s4o_ptr, symbol_c *scope, const char *variable_prefix) {
+ if (NULL == scope) ERROR;
+ this->s4o_ptr = s4o_ptr;
+ this->scope = scope;
+ this->variable_prefix = variable_prefix;
+}
+
+void *generate_c_SFC_IL_ST_c::visit(sequential_function_chart_c * symbol) {
+ generate_c_sfc_c generate_c_sfc(s4o_ptr, scope, variable_prefix);
+ generate_c_sfc.generate(symbol);
+ return NULL;
+}
+
+void *generate_c_SFC_IL_ST_c::visit(instruction_list_c *symbol) {
+ generate_c_il_c generate_c_il(s4o_ptr, scope, variable_prefix);
+ generate_c_il.generate(symbol);
+ return NULL;
+}
+
+void *generate_c_SFC_IL_ST_c::visit(statement_list_c *symbol) {
+ generate_c_st_c generate_c_st(s4o_ptr, scope, variable_prefix);
+ generate_c_st.generate(symbol);
+ return NULL;
+}
+
+
+
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+class generate_c_pous_c: public generate_c_typedecl_c {
+
+ public:
+ generate_c_pous_c(stage4out_c *s4o_ptr)
+ : generate_c_typedecl_c(s4o_ptr) {};
+ virtual ~generate_c_pous_c(void) {}
+
+
+ public:
+
+/*************************/
+/* B.1 - Common elements */
+/*************************/
+/*******************************************/
+/* B 1.1 - Letters, digits and identifiers */
+/*******************************************/
+ /* done in base class(es) */
+
+/*********************/
+/* B 1.2 - Constants */
+/*********************/
+ /* originally empty... */
+
+/******************************/
+/* B 1.2.1 - Numeric Literals */
+/******************************/
+ /* done in base class(es) */
+
+/*******************************/
+/* B.1.2.2 Character Strings */
+/*******************************/
+ /* done in base class(es) */
+
+/***************************/
+/* B 1.2.3 - Time Literals */
+/***************************/
+/************************/
+/* B 1.2.3.1 - Duration */
+/************************/
+ /* done in base class(es) */
+
+/************************************/
+/* B 1.2.3.2 - Time of day and Date */
+/************************************/
+ /* done in base class(es) */
+
+/**********************/
+/* B.1.3 - Data types */
+/**********************/
+/***********************************/
+/* B 1.3.1 - Elementary Data Types */
+/***********************************/
+ /* done in base class(es) */
+
+/********************************/
+/* B.1.3.2 - Generic data types */
+/********************************/
+ /* originally empty... */
+
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+ /* done in base class(es) */
+
+/*********************/
+/* B 1.4 - Variables */
+/*********************/
+ /* done in base class(es) */
+
+/********************************************/
+/* B.1.4.1 Directly Represented Variables */
+/********************************************/
+ /* done in base class(es) */
+
+/*************************************/
+/* B.1.4.2 Multi-element Variables */
+/*************************************/
+ /* done in base class(es) */
+
+/******************************************/
+/* B 1.4.3 - Declaration & Initialisation */
+/******************************************/
+ /* done in base class(es) */
+
+/**************************************/
+/* B.1.5 - Program organization units */
+/**************************************/
+/***********************/
+/* B 1.5.1 - Functions */
+/***********************/
+
+public:
+/* FUNCTION derived_function_name ':' elementary_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
+/* | FUNCTION derived_function_name ':' derived_type_name io_OR_function_var_declarations_list function_body END_FUNCTION */
+void *visit(function_declaration_c *symbol) {
+ generate_c_vardecl_c *vardecl;
+ TRACE("function_declaration_c");
+
+ /* start off by adding this declaration to the global
+ * function declaration symbol table...
+ */
+ function_symtable.insert(symbol->derived_function_name, symbol);
+
+ /* (A) Function declaration... */
+ /* (A.1) Function return type */
+ s4o.print("// FUNCTION\n");
+ symbol->type_name->accept(*this); /* return type */
+ s4o.print(" ");
+ /* (A.2) Function name */
+ symbol->derived_function_name->accept(*this);
+ s4o.print("(");
+
+ /* (A.3) Function parameters */
+ s4o.indent_right();
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::finterface_vf,
+ generate_c_vardecl_c::input_vt |
+ generate_c_vardecl_c::output_vt |
+ generate_c_vardecl_c::inoutput_vt);
+ vardecl->print(symbol->var_declarations_list);
+ delete vardecl;
+ s4o.indent_left();
+
+ s4o.print(")\n" + s4o.indent_spaces + "{\n");
+
+ /* (B) Function local variable declaration */
+ /* (B.1) Variables declared in ST source code */
+ s4o.indent_right();
+ vardecl = new generate_c_vardecl_c(&s4o, generate_c_vardecl_c::localinit_vf, generate_c_vardecl_c::private_vt);
+ vardecl->print(symbol->var_declarations_list);
+ delete vardecl;
+
+ /* (B.2) Temporary variable for function's return value */
+ /* It will have the same name as the function itself! */
+ s4o.print(s4o.indent_spaces);
+ symbol->type_name->accept(*this); /* return type */
+ s4o.print(" ");
+ symbol->derived_function_name->accept(*this);
+ s4o.print(" = ");
+ {
+ /* get the default value of this variable's type */
+ symbol_c *default_value = (symbol_c *)symbol->type_name->accept(*type_initial_value_c::instance());
+ if (default_value == NULL) ERROR;
+ default_value->accept(*this);
+ }
+ s4o.print(";\n\n");
+
+ /* (C) Function body */
+ generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol);
+ symbol->function_body->accept(generate_c_code);
+ s4o.print(s4o.indent_spaces + "return ");
+ symbol->derived_function_name->accept(*this);
+ s4o.print(";\n");
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n\n\n");
+
+ return NULL;
+}
+
+
+/* The remaining var_declarations_list_c, function_var_decls_c
+ * and var2_init_decl_list_c are handled in the generate_c_vardecl_c class
+ */
+
+
+/*****************************/
+/* B 1.5.2 - Function Blocks */
+/*****************************/
+public:
+/* FUNCTION_BLOCK derived_function_block_name io_OR_other_var_declarations function_block_body END_FUNCTION_BLOCK */
+//SYM_REF4(function_block_declaration_c, fblock_name, var_declarations, fblock_body, unused)
+void *visit(function_block_declaration_c *symbol) {
+ generate_c_vardecl_c *vardecl;
+ generate_c_sfcdecl_c *sfcdecl;
+ TRACE("function_block_declaration_c");
+
+ /* start off by adding this declaration to the global
+ * function block declaration symbol table...
+ */
+ function_block_type_symtable.insert(symbol->fblock_name, symbol);
+
+ /* (A) Function Block data structure declaration... */
+ /* (A.1) Data structure declaration */
+ s4o.print("// FUNCTION_BLOCK ");
+ symbol->fblock_name->accept(*this);
+ s4o.print("\n// Data part\n");
+ s4o.print("typedef struct {\n");
+ s4o.indent_right();
+ /* (A.2) Public variables: i.e. the function parameters... */
+ s4o.print(s4o.indent_spaces + "// FB Interface - IN, OUT, IN_OUT variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::input_vt |
+ generate_c_vardecl_c::output_vt |
+ generate_c_vardecl_c::inoutput_vt);
+ vardecl->print(symbol->var_declarations);
+ delete vardecl;
+ s4o.print("\n");
+ /* (A.3) Private internal variables */
+ s4o.print(s4o.indent_spaces + "// FB private variables - TEMP, private and located variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::temp_vt |
+ generate_c_vardecl_c::private_vt |
+ generate_c_vardecl_c::located_vt |
+ generate_c_vardecl_c::external_vt);
+ vardecl->print(symbol->var_declarations);
+ delete vardecl;
+ /* (A.4) Generate private internal variables for SFC */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcdecl_sd);
+ sfcdecl->print(symbol->fblock_body);
+ delete sfcdecl;
+ s4o.print("\n");
+
+ /* (A.5) Function Block data structure type name. */
+ s4o.indent_left();
+ s4o.print("} ");
+ symbol->fblock_name->accept(*this);
+ s4o.print(";\n\n");
+
+
+ /* (B) Constructor */
+ /* (B.1) Constructor name... */
+ s4o.print(s4o.indent_spaces + "void ");
+ symbol->fblock_name->accept(*this);
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(");
+
+ /* first and only parameter is a pointer to the data */
+ symbol->fblock_name->accept(*this);
+ s4o.print(" *");
+ s4o.print(FB_FUNCTION_PARAM);
+ s4o.print(") {\n");
+ s4o.indent_right();
+
+ /* (B.2) Member initializations... */
+ s4o.print(s4o.indent_spaces);
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::constructorinit_vf,
+ generate_c_vardecl_c::input_vt |
+ generate_c_vardecl_c::output_vt |
+ generate_c_vardecl_c::inoutput_vt |
+ generate_c_vardecl_c::private_vt |
+ generate_c_vardecl_c::located_vt |
+ generate_c_vardecl_c::external_vt);
+ vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
+ delete vardecl;
+ s4o.print("\n");
+ /* (B.3) Generate private internal variables for SFC */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcinit_sd);
+ sfcdecl->print(symbol->fblock_body, FB_FUNCTION_PARAM"->");
+ delete sfcdecl;
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n\n");
+
+
+ /* (C) Function with FB body */
+ /* (C.1) Step definitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepdef_sd);
+ sfcdecl->print(symbol->fblock_body);
+ delete sfcdecl;
+
+ /* (C.2) Action definitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actiondef_sd);
+ sfcdecl->print(symbol->fblock_body);
+ delete sfcdecl;
+
+ /* (C.3) Function declaration */
+ s4o.print("// Code part\n");
+ /* function interface */
+ s4o.print("void ");
+ symbol->fblock_name->accept(*this);
+ s4o.print(FB_FUNCTION_SUFFIX);
+ s4o.print("(");
+ /* first and only parameter is a pointer to the data */
+ symbol->fblock_name->accept(*this);
+ s4o.print(" *");
+ s4o.print(FB_FUNCTION_PARAM);
+ s4o.print(") {\n");
+ s4o.indent_right();
+
+ /* (C.4) Initialize TEMP variables */
+ /* function body */
+ s4o.print(s4o.indent_spaces + "// Initialise TEMP variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::init_vf,
+ generate_c_vardecl_c::temp_vt);
+ vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
+ delete vardecl;
+ s4o.print("\n");
+
+ /* (C.5) Function code */
+ generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol, FB_FUNCTION_PARAM"->");
+ symbol->fblock_body->accept(generate_c_code);
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "} // ");
+ symbol->fblock_name->accept(*this);
+ s4o.print(FB_FUNCTION_SUFFIX);
+ s4o.print(s4o.indent_spaces + "() \n\n");
+
+ /* (C.6) Step undefinitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepundef_sd);
+ sfcdecl->print(symbol->fblock_body);
+ delete sfcdecl;
+
+ /* (C.7) Action undefinitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actionundef_sd);
+ sfcdecl->print(symbol->fblock_body);
+ delete sfcdecl;
+
+ s4o.indent_left();
+ s4o.print("\n\n\n\n");
+
+ return NULL;
+}
+
+
+/* The remaining temp_var_decls_c, temp_var_decls_list_c
+ * and non_retentive_var_decls_c are handled in the generate_c_vardecl_c class
+ */
+
+
+/**********************/
+/* B 1.5.3 - Programs */
+/**********************/
+
+
+
+public:
+/* PROGRAM program_type_name program_var_declarations_list function_block_body END_PROGRAM */
+//SYM_REF4(program_declaration_c, program_type_name, var_declarations, function_block_body, unused)
+void *visit(program_declaration_c *symbol) {
+ generate_c_vardecl_c *vardecl;
+ generate_c_sfcdecl_c *sfcdecl;
+ TRACE("program_declaration_c");
+
+ /* start off by adding this declaration to the global
+ * program declaration symbol table...
+ */
+ program_type_symtable.insert(symbol->program_type_name, symbol);
+
+ /* (A) Program data structure declaration... */
+ /* (A.1) Data structure declaration */
+ s4o.print("// PROGRAM ");
+ symbol->program_type_name->accept(*this);
+ s4o.print("\n// Data part\n");
+ s4o.print("typedef struct {\n");
+ s4o.indent_right();
+
+ /* (A.2) Public variables: i.e. the program parameters... */
+ s4o.print(s4o.indent_spaces + "// PROGRAM Interface - IN, OUT, IN_OUT variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::input_vt |
+ generate_c_vardecl_c::output_vt |
+ generate_c_vardecl_c::inoutput_vt);
+ vardecl->print(symbol->var_declarations);
+ delete vardecl;
+ s4o.print("\n");
+ /* (A.3) Private internal variables */
+ s4o.print(s4o.indent_spaces + "// PROGRAM private variables - TEMP, private and located variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::temp_vt |
+ generate_c_vardecl_c::private_vt |
+ generate_c_vardecl_c::located_vt |
+ generate_c_vardecl_c::external_vt);
+ vardecl->print(symbol->var_declarations);
+ delete vardecl;
+ /* (A.4) Generate private internal variables for SFC */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcdecl_sd);
+ sfcdecl->print(symbol->function_block_body);
+ delete sfcdecl;
+
+ /* (A.5) Program data structure type name. */
+ s4o.indent_left();
+ s4o.print("} ");
+ symbol->program_type_name->accept(*this);
+ s4o.print(";\n\n");
+
+ /* (B) Constructor */
+ /* (B.1) Constructor name... */
+ s4o.print(s4o.indent_spaces + "void ");
+ symbol->program_type_name->accept(*this);
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(");
+
+ /* first and only parameter is a pointer to the data */
+ symbol->program_type_name->accept(*this);
+ s4o.print(" *");
+ s4o.print(FB_FUNCTION_PARAM);
+ s4o.print(") {\n");
+ s4o.indent_right();
+
+ /* (B.2) Member initializations... */
+ s4o.print(s4o.indent_spaces);
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::constructorinit_vf,
+ generate_c_vardecl_c::input_vt |
+ generate_c_vardecl_c::output_vt |
+ generate_c_vardecl_c::inoutput_vt |
+ generate_c_vardecl_c::private_vt |
+ generate_c_vardecl_c::located_vt |
+ generate_c_vardecl_c::external_vt);
+ vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
+ delete vardecl;
+ s4o.print("\n");
+ /* (B.3) Generate private internal variables for SFC */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::sfcinit_sd);
+ sfcdecl->print(symbol->function_block_body,FB_FUNCTION_PARAM"->");
+ delete sfcdecl;
+
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n\n");
+
+ /* (C) Function with PROGRAM body */
+ /* (C.1) Step definitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepdef_sd);
+ sfcdecl->print(symbol->function_block_body);
+ delete sfcdecl;
+
+ /* (C.2) Action definitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actiondef_sd);
+ sfcdecl->print(symbol->function_block_body);
+ delete sfcdecl;
+
+ /* (C.3) Function declaration */
+ s4o.print("// Code part\n");
+ /* function interface */
+ s4o.print("void ");
+ symbol->program_type_name->accept(*this);
+ s4o.print(FB_FUNCTION_SUFFIX);
+ s4o.print("(");
+ /* first and only parameter is a pointer to the data */
+ symbol->program_type_name->accept(*this);
+ s4o.print(" *");
+ s4o.print(FB_FUNCTION_PARAM);
+ s4o.print(") {\n");
+ s4o.indent_right();
+
+ /* (C.4) Initialize TEMP variables */
+ /* function body */
+ s4o.print(s4o.indent_spaces + "// Initialise TEMP variables\n");
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::init_vf,
+ generate_c_vardecl_c::temp_vt);
+ vardecl->print(symbol->var_declarations, NULL, FB_FUNCTION_PARAM"->");
+ delete vardecl;
+ s4o.print("\n");
+
+ /* (C.5) Function code */
+ generate_c_SFC_IL_ST_c generate_c_code(&s4o, symbol, FB_FUNCTION_PARAM"->");
+ symbol->function_block_body->accept(generate_c_code);
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "} // ");
+ symbol->program_type_name->accept(*this);
+ s4o.print(FB_FUNCTION_SUFFIX);
+ s4o.print(s4o.indent_spaces + "() \n\n");
+
+ /* (C.6) Step undefinitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::stepundef_sd);
+ sfcdecl->print(symbol->function_block_body);
+ delete sfcdecl;
+
+ /* (C.7) Action undefinitions */
+ sfcdecl = new generate_c_sfcdecl_c(&s4o, generate_c_sfcdecl_c::actionundef_sd);
+ sfcdecl->print(symbol->function_block_body);
+ delete sfcdecl;
+
+ s4o.indent_left();
+ s4o.print("\n\n\n\n");
+
+ return NULL;
+}
+
+}; /* generate_c_pous_c */
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+class generate_c_config_c: public generate_c_typedecl_c {
+
+ public:
+ generate_c_config_c(stage4out_c *s4o_ptr)
+ : generate_c_typedecl_c(s4o_ptr) {};
+ virtual ~generate_c_config_c(void) {}
+
+ typedef enum {
+ initprotos_dt,
+ initdeclare_dt,
+ runprotos_dt,
+ rundeclare_dt
+ } declaretype_t;
+
+ declaretype_t wanted_declaretype;
+
+/********************************/
+/* B 1.7 Configuration elements */
+/********************************/
+
+
+public:
+/*
+CONFIGURATION configuration_name
+ optional_global_var_declarations
+ (resource_declaration_list | single_resource_declaration)
+ optional_access_declarations
+ optional_instance_specific_initializations
+END_CONFIGURATION
+*/
+/*
+SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused)
+*/
+void *visit(configuration_declaration_c *symbol) {
+ generate_c_vardecl_c *vardecl;
+
+ /* Insert the header... */
+ s4o.print("/*******************************************/\n");
+ s4o.print("/* FILE GENERATED BY iec2c */\n");
+ s4o.print("/* Editing this file is not recommended... */\n");
+ s4o.print("/*******************************************/\n\n");
+ s4o.print("#include \"iec_std_lib.h\"\n\n");
+
+ /* (A) configuration declaration... */
+ /* (A.1) configuration name in comment */
+ s4o.print("// CONFIGURATION ");
+ symbol->configuration_name->accept(*this);
+ s4o.print("\n");
+
+ /* (A.2) Global variables */
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::global_vt);
+ vardecl->print(symbol);
+ delete vardecl;
+ s4o.print("\n");
+
+ /* (B) Initialisation Function */
+ /* (B.1) Ressources initialisation protos... */
+ wanted_declaretype = initprotos_dt;
+ symbol->resource_declarations->accept(*this);
+ s4o.print("\n");
+
+ /* (B.2) Initialisation function name... */
+ s4o.print(s4o.indent_spaces + "void config");
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(void) {\n");
+ s4o.indent_right();
+
+ /* (B.3) Global variables initializations... */
+ s4o.print(s4o.indent_spaces);
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::constructorinit_vf,
+ generate_c_vardecl_c::global_vt);
+ vardecl->print(symbol);
+ delete vardecl;
+ s4o.print("\n");
+
+ /* (B.3) Resources initializations... */
+ wanted_declaretype = initdeclare_dt;
+ symbol->resource_declarations->accept(*this);
+
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n\n");
+
+
+ /* (C) Run Function*/
+ /* (C.1) Resources run functions protos... */
+ wanted_declaretype = runprotos_dt;
+ symbol->resource_declarations->accept(*this);
+ s4o.print("\n");
+
+ /* (C.2) Run function name... */
+ s4o.print(s4o.indent_spaces + "void config");
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(int tick) {\n");
+ s4o.indent_right();
+
+ /* (C.3) Resources initializations... */
+ wanted_declaretype = rundeclare_dt;
+ symbol->resource_declarations->accept(*this);
+
+ /* (C.3) Close Public Function body */
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n");
+
+ return NULL;
+}
+
+void *visit(resource_declaration_c *symbol) {
+ if (wanted_declaretype == initprotos_dt || wanted_declaretype == runprotos_dt) {
+ s4o.print(s4o.indent_spaces + "void ");
+ symbol->resource_name->accept(*this);
+ if (wanted_declaretype == initprotos_dt) {
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(void);\n");
+ }
+ else {
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(int tick);\n");
+ }
+ }
+ if (wanted_declaretype == initdeclare_dt || wanted_declaretype == rundeclare_dt) {
+ s4o.print(s4o.indent_spaces);
+ symbol->resource_name->accept(*this);
+ if (wanted_declaretype == initdeclare_dt) {
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("();\n");
+ }
+ else {
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(tick);\n");
+ }
+ }
+ return NULL;
+}
+
+void *visit(single_resource_declaration_c *symbol) {
+ if (wanted_declaretype == initprotos_dt || wanted_declaretype == runprotos_dt) {
+ s4o.print(s4o.indent_spaces + "void RESOURCE");
+ if (wanted_declaretype == initprotos_dt) {
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(void);\n");
+ }
+ else {
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(int tick);\n");
+ }
+ }
+ if (wanted_declaretype == initdeclare_dt || wanted_declaretype == rundeclare_dt) {
+ s4o.print(s4o.indent_spaces + "RESOURCE");
+ if (wanted_declaretype == initdeclare_dt) {
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("();\n");
+ }
+ else {
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(tick);\n");
+ }
+ }
+ return NULL;
+}
+
+};
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+class generate_c_resources_c: public generate_c_typedecl_c {
+
+ search_var_instance_decl_c *search_config_instance;
+ search_var_instance_decl_c *search_resource_instance;
+
+ private:
+ /* The name of the resource curretnly being processed... */
+ symbol_c *current_resource_name;
+ symbol_c *current_global_vars;
+
+ public:
+ generate_c_resources_c(stage4out_c *s4o_ptr, symbol_c *config_scope, symbol_c *resource_scope, unsigned long time)
+ : generate_c_typedecl_c(s4o_ptr) {
+ search_config_instance = new search_var_instance_decl_c(config_scope);
+ search_resource_instance = new search_var_instance_decl_c(resource_scope);
+ common_ticktime = time;
+ current_resource_name = NULL;
+ current_global_vars = NULL;
+ };
+ virtual ~generate_c_resources_c(void) {
+ delete search_config_instance;
+ delete search_resource_instance;
+ }
+
+ typedef enum {
+ declare_dt,
+ init_dt,
+ run_dt
+ } declaretype_t;
+
+ declaretype_t wanted_declaretype;
+
+ unsigned long common_ticktime;
+
+ const char *current_program_name;
+
+ typedef enum {
+ assign_at,
+ send_at
+ } assigntype_t;
+
+ assigntype_t wanted_assigntype;
+
+/********************************/
+/* B 1.7 Configuration elements */
+/********************************/
+
+/*
+RESOURCE resource_name ON resource_type_name
+ optional_global_var_declarations
+ single_resource_declaration
+END_RESOURCE
+*/
+// SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
+ void *visit(resource_declaration_c *symbol) {
+ current_resource_name = symbol->resource_name;
+ current_global_vars = symbol->global_var_declarations;
+
+ symbol->resource_declaration->accept(*this);
+
+ current_resource_name = NULL;
+ current_global_vars = NULL;
+ return NULL;
+ }
+
+/* task_configuration_list program_configuration_list */
+// SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
+ void *visit(single_resource_declaration_c *symbol) {
+ bool single_resource = current_resource_name == NULL;
+ if (single_resource)
+ current_resource_name = new identifier_c("RESOURCE");
+ generate_c_vardecl_c *vardecl;
+
+ /* Insert the header... */
+ s4o.print("/*******************************************/\n");
+ s4o.print("/* FILE GENERATED BY iec2c */\n");
+ s4o.print("/* Editing this file is not recommended... */\n");
+ s4o.print("/*******************************************/\n\n");
+ s4o.print("#include \"iec_std_lib.h\"\n\n");
+
+ /* (A) resource declaration... */
+ /* (A.1) resource name in comment */
+ s4o.print("// RESOURCE ");
+ current_resource_name->accept(*this);
+ s4o.print("\n");
+
+ /* (A.2) Global variables... */
+ if (current_global_vars != NULL) {
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::local_vf,
+ generate_c_vardecl_c::global_vt);
+ vardecl->print(current_global_vars);
+ delete vardecl;
+ }
+ s4o.print("\n");
+
+ /* (A.3) POUs inclusion */
+ s4o.print("#include \"POUS.c\"\n\n");
+
+ /* (A.4) Resource programs declaration... */
+ wanted_declaretype = declare_dt;
+ symbol->program_configuration_list->accept(*this);
+ s4o.print("\n");
+
+ /* (B) resource initialisation function... */
+ /* (B.1) initialisation function name... */
+ s4o.print("void ");
+ current_resource_name->accept(*this);
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(void) {\n");
+ s4o.indent_right();
+
+ /* (B.2) Global variables initialisations... */
+ if (current_global_vars != NULL) {
+ s4o.print(s4o.indent_spaces);
+ vardecl = new generate_c_vardecl_c(&s4o,
+ generate_c_vardecl_c::constructorinit_vf,
+ generate_c_vardecl_c::global_vt);
+ vardecl->print(current_global_vars);
+ delete vardecl;
+ }
+ s4o.print("\n");
+
+ /* (B.3) Resource programs initialisations... */
+ wanted_declaretype = init_dt;
+ symbol->program_configuration_list->accept(*this);
+
+ s4o.indent_left();
+ s4o.print("}\n\n");
+
+ /* (C) Resource run function... */
+ /* (C.1) Run function name... */
+ s4o.print("void ");
+ current_resource_name->accept(*this);
+ s4o.print(FB_RUN_SUFFIX);
+ s4o.print("(int tick) {\n");
+ s4o.indent_right();
+
+ /* (C.2) Task management... */
+ symbol->task_configuration_list->accept(*this);
+
+ /* (C.3) Program run declaration... */
+ wanted_declaretype = run_dt;
+ symbol->program_configuration_list->accept(*this);
+
+ s4o.indent_left();
+ s4o.print("}\n\n");
+
+ if (single_resource) {
+ delete current_resource_name;
+ current_resource_name = NULL;
+ }
+ return NULL;
+ }
+
+/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
+//SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused)
+ void *visit(program_configuration_c *symbol) {
+ if (wanted_declaretype == declare_dt) {
+ s4o.print(s4o.indent_spaces);
+ symbol->program_type_name->accept(*this);
+ s4o.print(" ");
+ symbol->program_name->accept(*this);
+ s4o.print(";\n");
+ }
+ if (wanted_declaretype == init_dt) {
+ s4o.print(s4o.indent_spaces);
+ symbol->program_type_name->accept(*this);
+ s4o.print(FB_INIT_SUFFIX);
+ s4o.print("(&");
+ symbol->program_name->accept(*this);
+ s4o.print(");\n");
+ }
+ if (wanted_declaretype == run_dt) {
+ current_program_name = ((identifier_c*)(symbol->program_name))->value;
+ if (symbol->task_name != NULL) {
+ s4o.print(s4o.indent_spaces);
+ s4o.print("if (!");
+ symbol->task_name->accept(*this);
+ s4o.print(") {\n");
+ s4o.indent_right();
+ }
+
+ wanted_assigntype = assign_at;
+ if (symbol->prog_conf_elements != NULL)
+ symbol->prog_conf_elements->accept(*this);
+
+ s4o.print(s4o.indent_spaces);
+ symbol->program_type_name->accept(*this);
+ s4o.print(FB_FUNCTION_SUFFIX);
+ s4o.print("(&");
+ symbol->program_name->accept(*this);
+ s4o.print(");\n");
+
+ wanted_assigntype = send_at;
+ if (symbol->prog_conf_elements != NULL)
+ symbol->prog_conf_elements->accept(*this);
+
+ if (symbol->task_name != NULL) {
+ s4o.indent_left();
+ s4o.print(s4o.indent_spaces + "}\n");
+ }
+ }
+ return NULL;
+ }
+
+/* TASK task_name task_initialization */
+//SYM_REF2(task_configuration_c, task_name, task_initialization)
+ void *visit(task_configuration_c *symbol) {
+ s4o.print(s4o.indent_spaces + "int ");
+ symbol->task_name->accept(*this);
+ s4o.print(" = ");
+ symbol->task_initialization->accept(*this);
+ s4o.print(";\n");
+ return NULL;
+ }
+
+/* '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */
+//SYM_REF4(task_initialization_c, single_data_source, interval_data_source, priority_data_source, unused)
+ void *visit(task_initialization_c *symbol) {
+ if (symbol->interval_data_source != NULL) {
+ calculate_time_c calculate_time;
+ symbol->interval_data_source->accept(calculate_time);
+ unsigned long time = calculate_time.get_time();
+ if (time != 0) {
+ s4o.print("tick % ");
+ s4o.print_integer((int)(time / common_ticktime));
+ }
+ else
+ s4o.print("1");
+ }
+ else
+ s4o.print("1");
+ return NULL;
+ }
+
+/* any_symbolic_variable ASSIGN prog_data_source */
+//SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source)
+ void *visit(prog_cnxn_assign_c *symbol) {
+ if (wanted_assigntype == assign_at) {
+ symbol_c *var_decl;
+ unsigned int vartype = 0;
+ symbol_c *current_var_reference = ((global_var_reference_c *)(symbol->prog_data_source))->global_var_name;
+ var_decl = search_resource_instance->get_decl(current_var_reference);
+ if (var_decl == NULL) {
+ var_decl = search_config_instance->get_decl(current_var_reference);
+ if (var_decl == NULL)
+ ERROR;
+ else
+ vartype = search_config_instance->get_vartype();
+ }
+ else
+ vartype = search_resource_instance->get_vartype();
+
+ s4o.print(s4o.indent_spaces + "{extern ");
+ var_decl->accept(*this);
+ s4o.print(" ");
+ symbol->prog_data_source->accept(*this);
+ s4o.print("; ");
+ s4o.print(current_program_name);
+ s4o.print(".");
+ symbol->symbolic_variable->accept(*this);
+ s4o.print(" = ");
+ if (vartype || search_var_instance_decl_c::global_vt)
+ s4o.print("*");
+ symbol->prog_data_source->accept(*this);
+ s4o.print(";}\n");
+ }
+ return NULL;
+ }
+
+/* any_symbolic_variable SENDTO data_sink */
+//SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, data_sink)
+ void *visit(prog_cnxn_sendto_c *symbol) {
+ if (wanted_assigntype == send_at) {
+ symbol_c *var_decl;
+ unsigned int vartype = 0;
+ symbol_c *current_var_reference = ((global_var_reference_c *)(symbol->data_sink))->global_var_name;
+ var_decl = search_resource_instance->get_decl(current_var_reference);
+ if (var_decl == NULL) {
+ var_decl = search_config_instance->get_decl(current_var_reference);
+ if (var_decl == NULL)
+ ERROR;
+ else
+ vartype = search_config_instance->get_vartype();
+ }
+ else
+ vartype = search_resource_instance->get_vartype();
+
+ s4o.print(s4o.indent_spaces);
+ s4o.print(s4o.indent_spaces + "{extern ");
+ var_decl->accept(*this);
+ s4o.print(" ");
+ symbol->data_sink->accept(*this);
+ s4o.print("; ");
+ if (vartype || search_var_instance_decl_c::global_vt)
+ s4o.print("*");
+ symbol->data_sink->accept(*this);
+ s4o.print(" = ");
+ s4o.print(current_program_name);
+ s4o.print(".");
+ symbol->symbolic_variable->accept(*this);
+ s4o.print("};\n");
+ }
+ return NULL;
+ }
+
+};
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+class generate_c_c: public iterator_visitor_c {
+ protected:
+ stage4out_c &s4o;
+ stage4out_c pous_s4o;
+ stage4out_c located_variables_s4o;
+ generate_c_pous_c generate_c_pous;
+
+ symbol_c *current_configuration;
+
+ const char *current_name;
+ const char *current_builddir;
+
+ unsigned long common_ticktime;
+
+ public:
+ generate_c_c(stage4out_c *s4o_ptr, const char *builddir):
+ s4o(*s4o_ptr),
+ pous_s4o(builddir, "POUS", "c"),
+ located_variables_s4o(builddir, "LOCATED_VARIABLES","h"),
+ generate_c_pous(&pous_s4o) {
+ current_builddir = builddir;
+ current_configuration = NULL;
+ }
+
+ ~generate_c_c(void) {}
+
+/***************************/
+/* B 0 - Programming Model */
+/***************************/
+ void *visit(library_c *symbol) {
+ generate_location_list_c generate_location_list(&located_variables_s4o);
+ symbol->accept(generate_location_list);
+
+ for(int i = 0; i < symbol->n; i++) {
+ symbol->elements[i]->accept(*this);
+ }
+ return NULL;
+ }
+
+/*************************/
+/* B.1 - Common elements */
+/*************************/
+/*******************************************/
+/* B 1.1 - Letters, digits and identifiers */
+/*******************************************/
+ void *visit(identifier_c *symbol) {
+ current_name = symbol->value;
+ return NULL;
+ }
+
+/**************************************/
+/* B.1.5 - Program organization units */
+/**************************************/
+/***********************/
+/* B 1.5.1 - Functions */
+/***********************/
+ void *visit(function_declaration_c *symbol) {
+ symbol->accept(generate_c_pous);
+ return NULL;
+ }
+
+/*****************************/
+/* B 1.5.2 - Function Blocks */
+/*****************************/
+ void *visit(function_block_declaration_c *symbol) {
+ symbol->accept(generate_c_pous);
+ return NULL;
+ }
+
+/**********************/
+/* B 1.5.3 - Programs */
+/**********************/
+ void *visit(program_declaration_c *symbol) {
+ symbol->accept(generate_c_pous);
+ return NULL;
+ }
+
+
+/********************************/
+/* B 1.7 Configuration elements */
+/********************************/
+ void *visit(configuration_declaration_c *symbol) {
+ static int configuration_count = 0;
+
+ if (configuration_count++) {
+ /* the first configuration is the one we will use!! */
+ ERROR;
+ }
+
+ current_configuration = symbol;
+
+ calculate_common_ticktime_c calculate_common_ticktime;
+ symbol->accept(calculate_common_ticktime);
+ common_ticktime = calculate_common_ticktime.get_ticktime();
+
+ symbol->configuration_name->accept(*this);
+ stage4out_c config_s4o(current_builddir, current_name, "c");
+ generate_c_config_c generate_c_config(&config_s4o);
+ symbol->accept(generate_c_config);
+
+ config_s4o.print("int common_ticktime__ = ");
+ config_s4o.print_integer((int)(common_ticktime / 1000000));
+ config_s4o.print("; /*ms*/\n");
+
+ symbol->resource_declarations->accept(*this);
+
+ current_configuration = NULL;
+
+ return NULL;
+ }
+
+ void *visit(resource_declaration_c *symbol) {
+ symbol->resource_name->accept(*this);
+ stage4out_c resources_s4o(current_builddir, current_name, "c");
+ generate_c_resources_c generate_c_resources(&resources_s4o, current_configuration, symbol, common_ticktime);
+ symbol->accept(generate_c_resources);
+ return NULL;
+ }
+
+ void *visit(single_resource_declaration_c *symbol) {
+ stage4out_c resources_s4o(current_builddir, "RESOURCE", "c");
+ generate_c_resources_c generate_c_resources(&resources_s4o, current_configuration, symbol, common_ticktime);
+ symbol->accept(generate_c_resources);
+ return NULL;
+ }
+
+};
+
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+/***********************************************************************/
+
+
+
+
+visitor_c *new_code_generator(stage4out_c *s4o, const char *builddir) {return new generate_c_c(s4o, builddir);}
+void delete_code_generator(visitor_c *code_generator) {delete code_generator;}
+
+