/*
* (c) 2007 Mario de Sousa, Laurent Bessard
*
* 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)
*
*/
/*
* Conversion of sfc networks (i.e. SFC code).
*
* This is part of the 4th stage that generates
* a c++ source program equivalent to the SFC, IL and ST
* code.
*/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
/***********************************************************************/
class generate_c_sfcdecl_c: protected generate_c_typedecl_c {
public:
typedef enum {
sfcdecl_sd,
sfcinit_sd,
stepcount_sd,
stepdef_sd,
stepundef_sd,
actiondef_sd,
actionundef_sd,
actioncount_sd
} sfcdeclaration_t;
private:
char step_number;
char action_number;
char transition_number;
sfcdeclaration_t wanted_sfcdeclaration;
public:
generate_c_sfcdecl_c(stage4out_c *s4o_ptr, sfcdeclaration_t sfcdeclaration)
: generate_c_typedecl_c(s4o_ptr) {
wanted_sfcdeclaration = sfcdeclaration;
}
~generate_c_sfcdecl_c(void) {}
void print(symbol_c *symbol, const char *variable_prefix = NULL) {
this->set_variable_prefix(variable_prefix);
symbol->accept(*this);
}
/*********************************************/
/* B.1.6 Sequential function chart elements */
/*********************************************/
void *visit(sequential_function_chart_c *symbol) {
step_number = 0;
action_number = 0;
transition_number = 0;
switch (wanted_sfcdeclaration) {
case sfcdecl_sd:
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
/* steps table declaration */
s4o.print(s4o.indent_spaces + "STEP __step_list[");
s4o.print_integer(step_number);
s4o.print("];\n");
s4o.print(s4o.indent_spaces + "UINT __nb_steps;\n");
/* actions table declaration */
s4o.print(s4o.indent_spaces + "ACTION __action_list[");
s4o.print_integer(action_number);
s4o.print("];\n");
s4o.print(s4o.indent_spaces + "UINT __nb_actions;\n");
/* transitions table declaration */
s4o.print(s4o.indent_spaces + "BOOL __transition_list[");
s4o.print_integer(transition_number);
s4o.print("];\n");
/* transitions debug table declaration */
s4o.print(s4o.indent_spaces + "BOOL __debug_transition_list[");
s4o.print_integer(transition_number);
s4o.print("];\n");
/* last_ticktime declaration */
s4o.print(s4o.indent_spaces + "TIME __lasttick_time;\n");
break;
case sfcinit_sd:
s4o.print(s4o.indent_spaces);
s4o.print("UINT i;\n");
/* steps table count */
wanted_sfcdeclaration = stepcount_sd;
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print(s4o.indent_spaces);
print_variable_prefix();
s4o.print("__nb_steps = ");
s4o.print_integer(step_number);
s4o.print(";\n");
step_number = 0;
wanted_sfcdeclaration = sfcinit_sd;
/* steps table initialisation */
s4o.print(s4o.indent_spaces + "STEP temp_step = {0, 0, 0};\n");
s4o.print(s4o.indent_spaces + "for(i = 0; i < ");
print_variable_prefix();
s4o.print("__nb_steps; i++) {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces);
print_variable_prefix();
s4o.print("__step_list[i] = temp_step;\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
/* steps table count */
wanted_sfcdeclaration = actioncount_sd;
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print(s4o.indent_spaces);
print_variable_prefix();
s4o.print("__nb_actions = ");
s4o.print_integer(action_number);
s4o.print(";\n");
action_number = 0;
wanted_sfcdeclaration = sfcinit_sd;
/* actions table initialisation */
s4o.print(s4o.indent_spaces + "ACTION temp_action = {0, 0, 0, 0, 0, 0};\n");
s4o.print(s4o.indent_spaces + "for(i = 0; i < ");
print_variable_prefix();
s4o.print("__nb_actions; i++) {\n");
s4o.indent_right();
s4o.print(s4o.indent_spaces);
print_variable_prefix();
s4o.print("__action_list[i] = temp_action;\n");
s4o.indent_left();
s4o.print(s4o.indent_spaces + "}\n");
/* last_ticktime initialisation */
print_variable_prefix();
s4o.print("__lasttick_time = __CURRENT_TIME;\n");
break;
case stepdef_sd:
s4o.print("// Steps definitions\n");
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print("\n");
break;
case actiondef_sd:
s4o.print("// Actions definitions\n");
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print("\n");
break;
case stepundef_sd:
s4o.print("// Steps undefinitions\n");
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print("\n");
break;
case actionundef_sd:
s4o.print("// Actions undefinitions\n");
for(int i = 0; i < symbol->n; i++)
symbol->elements[i]->accept(*this);
s4o.print("\n");
break;
default:
break;
}
return NULL;
}
void *visit(initial_step_c *symbol) {
switch (wanted_sfcdeclaration) {
case stepcount_sd:
case sfcdecl_sd:
step_number++;
break;
case sfcinit_sd:
s4o.print(s4o.indent_spaces);
print_variable_prefix();
s4o.print("__step_list[");
s4o.print_integer(step_number);
s4o.print("].state = 1;\n");
step_number++;
break;
case stepdef_sd:
s4o.print("#define ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->step_name->accept(*this);
s4o.print(" ");
s4o.print_integer(step_number);
s4o.print("\n");
step_number++;
break;
case stepundef_sd:
s4o.print("#undef ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->step_name->accept(*this);
s4o.print("\n");
break;
default:
break;
}
return NULL;
}
void *visit(step_c *symbol) {
switch (wanted_sfcdeclaration) {
case stepcount_sd:
case sfcdecl_sd:
case sfcinit_sd:
step_number++;
break;
case stepdef_sd:
s4o.print("#define ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->step_name->accept(*this);
s4o.print(" ");
s4o.print_integer(step_number);
s4o.print("\n");
step_number++;
break;
case stepundef_sd:
s4o.print("#undef ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->step_name->accept(*this);
s4o.print("\n");
break;
default:
break;
}
return NULL;
}
void *visit(transition_c *symbol) {
switch (wanted_sfcdeclaration) {
case sfcdecl_sd:
transition_number++;
break;
default:
break;
}
return NULL;
}
void *visit(action_c *symbol) {
switch (wanted_sfcdeclaration) {
case actiondef_sd:
s4o.print("#define ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->action_name->accept(*this);
s4o.print(" ");
s4o.print_integer(action_number);
s4o.print("\n");
action_number++;
break;
case actionundef_sd:
s4o.print("#undef ");
s4o.print(SFC_STEP_ACTION_PREFIX);
symbol->action_name->accept(*this);
s4o.print("\n");
break;
case actioncount_sd:
case sfcdecl_sd:
action_number++;
break;
default:
break;
}
return NULL;
}
void *visit(instruction_list_c *symbol) {
return NULL;
}
void *visit(statement_list_c *symbol) {
return NULL;
}
}; /* generate_c_sfcdecl_c */