lbessard@17: /*
lbessard@17:  * (c) 2007 Mario de Sousa, Laurent Bessard
lbessard@17:  *
lbessard@17:  * Offered to the public under the terms of the GNU General Public License
lbessard@17:  * as published by the Free Software Foundation; either version 2 of the
lbessard@17:  * License, or (at your option) any later version.
lbessard@17:  *
lbessard@17:  * This program is distributed in the hope that it will be useful, but
lbessard@17:  * WITHOUT ANY WARRANTY; without even the implied warranty of
lbessard@17:  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
lbessard@17:  * Public License for more details.
lbessard@17:  *
lbessard@17:  * This code is made available on the understanding that it will not be
lbessard@17:  * used in safety-critical situations without a full and competent review.
lbessard@17:  */
lbessard@17: 
lbessard@17: /*
lbessard@17:  * An IEC 61131-3 IL and ST compiler.
lbessard@17:  *
lbessard@17:  * Based on the
lbessard@17:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
lbessard@17:  *
lbessard@17:  */
lbessard@17: 
lbessard@17: 
lbessard@17: /*
lbessard@17:  * Conversion of sfc networks (i.e. SFC code).
lbessard@17:  *
lbessard@17:  * This is part of the 4th stage that generates
lbessard@17:  * a c++ source program equivalent to the SFC, IL and ST
lbessard@17:  * code.
lbessard@17:  */
lbessard@17: 
lbessard@17: 
lbessard@17: 
lbessard@17: 
lbessard@17: /***********************************************************************/
lbessard@17: /***********************************************************************/
lbessard@17: /***********************************************************************/
lbessard@17: /***********************************************************************/
lbessard@17: 
lbessard@49: class generate_cc_sfcdecl_c: protected generate_cc_typedecl_c {
lbessard@49:   
lbessard@49:   public:
lbessard@49:       typedef enum {
lbessard@49:         sfcdecl_sg,
lbessard@49:         sfcinit_sg,
lbessard@49:         stepdef_sg,
lbessard@49:         stepundef_sg,
lbessard@49:         actiondef_sg,
lbessard@49:         actionundef_sg
lbessard@49:        } sfcgeneration_t;
lbessard@17:   
lbessard@17:   private:
lbessard@17:     char step_number;
lbessard@49:     char action_number;
lbessard@49:     char transition_number;
lbessard@49:     
lbessard@49:     sfcgeneration_t wanted_sfcgeneration;
lbessard@17:     
lbessard@17:   public:
lbessard@49:     generate_cc_sfcdecl_c(stage4out_c *s4o_ptr, sfcgeneration_t sfcgeneration)
lbessard@49:     : generate_cc_typedecl_c(s4o_ptr) {
lbessard@49:       wanted_sfcgeneration = sfcgeneration;
lbessard@49:     }
lbessard@49:     ~generate_cc_sfcdecl_c(void) {}
lbessard@49:     
lbessard@49:     void print(symbol_c *symbol, const char *variable_prefix = NULL) {
lbessard@49:       this->set_variable_prefix(variable_prefix);
lbessard@49:       
lbessard@49:       symbol->accept(*this);
lbessard@49:     }
lbessard@49:     
lbessard@17: /*********************************************/
lbessard@17: /* B.1.6  Sequential function chart elements */
lbessard@17: /*********************************************/
lbessard@17:     
lbessard@49:     void *visit(sequential_function_chart_c *symbol) {
lbessard@49:       step_number = 0;
lbessard@49:       action_number = 0;
lbessard@49:       transition_number = 0;
lbessard@49:       switch (wanted_sfcgeneration) {
lbessard@49:         case sfcdecl_sg:
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           
lbessard@49:           /* steps table declaration */
lbessard@49:           s4o.print(s4o.indent_spaces + "STEP step_list[");
lbessard@49:           s4o.print_integer(step_number);
lbessard@49:           s4o.print("];\n");
lbessard@49:           s4o.print(s4o.indent_spaces + "UINT nb_steps = ");
lbessard@49:           s4o.print_integer(step_number);
lbessard@49:           s4o.print(";\n");
lbessard@49:           
lbessard@49:           /* actions table declaration */
lbessard@49:           s4o.print(s4o.indent_spaces + "ACTION action_list[");
lbessard@49:           s4o.print_integer(action_number);
lbessard@49:           s4o.print("];\n");
lbessard@49:           s4o.print(s4o.indent_spaces + "UINT nb_actions = ");
lbessard@49:           s4o.print_integer(action_number);
lbessard@49:           s4o.print(";\n");
lbessard@49:           
lbessard@49:           /* transitions table declaration */
lbessard@49:           s4o.print(s4o.indent_spaces + "USINT transition_list[");
lbessard@49:           s4o.print_integer(transition_number);
lbessard@49:           s4o.print("];\n");
lbessard@49:           break;
lbessard@49:         case sfcinit_sg:
lbessard@49:           /* steps table initialisation */
lbessard@49:           s4o.print(s4o.indent_spaces + "STEP temp_step = {0, 0, 0};\n");
lbessard@49:           s4o.print(s4o.indent_spaces + "for(UINT i = 0; i < ");
lbessard@49:           print_variable_prefix();
lbessard@49:           s4o.print("nb_steps; i++) {\n");
lbessard@49:           s4o.indent_right();
lbessard@49:           s4o.print(s4o.indent_spaces);
lbessard@49:           print_variable_prefix();
lbessard@49:           s4o.print("step_list[i] = temp_step;\n");
lbessard@49:           s4o.indent_left();
lbessard@49:           s4o.print(s4o.indent_spaces + "}\n");
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           
lbessard@49:           /* actions table initialisation */
lbessard@49:           s4o.print(s4o.indent_spaces + "ACTION temp_action = {0, 0, 0, 0, 0, 0};\n");
lbessard@49:           s4o.print(s4o.indent_spaces + "for(UINT i = 0; i < ");
lbessard@49:           print_variable_prefix();
lbessard@49:           s4o.print("nb_actions; i++) {\n");
lbessard@49:           s4o.indent_right();
lbessard@49:           s4o.print(s4o.indent_spaces);
lbessard@49:           print_variable_prefix();
lbessard@49:           s4o.print("action_list[i] = temp_action;\n");
lbessard@49:           s4o.indent_left();
lbessard@49:           s4o.print(s4o.indent_spaces + "}\n");
lbessard@49:           break;
lbessard@49:         case stepdef_sg:
lbessard@49:           s4o.print("// Steps definitions\n");
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         case actiondef_sg:
lbessard@49:           s4o.print("// Actions definitions\n");
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         case stepundef_sg:
lbessard@49:           s4o.print("// Steps undefinitions\n");
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         case actionundef_sg:
lbessard@49:           s4o.print("// Actions undefinitions\n");
lbessard@49:           for(int i = 0; i < symbol->n; i++)
lbessard@49:             symbol->elements[i]->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:       }
lbessard@49:       return NULL;
lbessard@49:     }
lbessard@49:     
lbessard@17:     void *visit(initial_step_c *symbol) {
lbessard@49:       switch (wanted_sfcgeneration) {
lbessard@49:         case sfcdecl_sg:
lbessard@49:           step_number++;
lbessard@49:           break;
lbessard@49:         case sfcinit_sg:
lbessard@49:           s4o.print(s4o.indent_spaces);
lbessard@49:           print_variable_prefix();
lbessard@49:           s4o.print("action_list[");
lbessard@49:           s4o.print_integer(step_number);
lbessard@49:           s4o.print("].state = 1;\n");
lbessard@49:           step_number++;
lbessard@49:           break;
lbessard@49:         case stepdef_sg:
lbessard@49:           s4o.print("#define ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->step_name->accept(*this);
lbessard@49:           s4o.print(" ");
lbessard@49:           s4o.print_integer(step_number);
lbessard@49:           s4o.print("\n");
lbessard@49:           step_number++;
lbessard@49:           break;
lbessard@49:         case stepundef_sg:
lbessard@49:           s4o.print("#undef ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->step_name->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         default:
lbessard@49:           break;
lbessard@49:       }
lbessard@17:       return NULL;
lbessard@17:     }
lbessard@17:     
lbessard@17:     void *visit(step_c *symbol) {
lbessard@49:       switch (wanted_sfcgeneration) {
lbessard@49:         case sfcdecl_sg:
lbessard@49:           step_number++;
lbessard@49:           break;
lbessard@49:         case stepdef_sg:
lbessard@49:           s4o.print("#define ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->step_name->accept(*this);
lbessard@49:           s4o.print(" ");
lbessard@49:           s4o.print_integer(step_number);
lbessard@49:           s4o.print("\n");
lbessard@49:           step_number++;
lbessard@49:           break;
lbessard@49:         case stepundef_sg:
lbessard@49:           s4o.print("#undef ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->step_name->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         default:
lbessard@49:           break;
lbessard@49:       }
lbessard@49:       return NULL;
lbessard@49:     }
lbessard@49: 
lbessard@49:     void *visit(transition_c *symbol) {
lbessard@49:       switch (wanted_sfcgeneration) {
lbessard@49:         case sfcdecl_sg:
lbessard@49:           transition_number++;
lbessard@49:           break;
lbessard@49:         default:
lbessard@49:           break;
lbessard@49:       }
lbessard@49:       return NULL;
lbessard@49:     }
lbessard@17: 
lbessard@17:     void *visit(action_c *symbol) {
lbessard@49:       switch (wanted_sfcgeneration) {
lbessard@49:         case actiondef_sg:
lbessard@49:           s4o.print("#define ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->action_name->accept(*this);
lbessard@49:           s4o.print(" ");
lbessard@49:           s4o.print_integer(action_number);
lbessard@49:           s4o.print("\n");
lbessard@49:           action_number++;
lbessard@49:           break;
lbessard@49:         case actionundef_sg:
lbessard@49:           s4o.print("#undef ");
lbessard@49:           s4o.print(SFC_STEP_ACTION_PREFIX);
lbessard@49:           symbol->action_name->accept(*this);
lbessard@49:           s4o.print("\n");
lbessard@49:           break;
lbessard@49:         case sfcdecl_sg:
lbessard@49:           action_number++;
lbessard@49:           break;
lbessard@49:         default:
lbessard@49:           break;
lbessard@49:       }
lbessard@49:       return NULL;
lbessard@49:     }
lbessard@49: 
lbessard@49: }; /* generate_cc_sfcdecl_c */
lbessard@49: