stage4/generate_c/generate_c_configbody.cc
author Edouard Tisserant
Tue, 14 Dec 2021 08:48:05 +0100
changeset 1096 fad6e7a818e2
parent 945 477393b00f95
permissions -rw-r--r--
Variable forcing now uses limited list and buffer instead of systematical instance tree traversal and in-tree "fvalue" to keep track of forced value for pointed variables (external, located). Pointer swapping is performed when forcing externals and located, with backup being restored when forcing is reset. Match Beremiz commit 93ad018fb602.
/*
 *  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.
 */

class generate_c_configbody_c: public generate_c_base_and_typeid_c {

  public:
    generate_c_configbody_c(stage4out_c *s4o_ptr)
    : generate_c_base_and_typeid_c(s4o_ptr) {
      current_resource_name = NULL;
    }

    virtual ~generate_c_configbody_c(void) {}


  private:
    /* The name of the resource curretnly being processed... */
    symbol_c *current_resource_name;


/********************************/
/* 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) {
  TRACE("configuration_declaration_c");

  symbol->resource_declarations->accept(*this);
  return NULL;
}



/* helper symbol for configuration_declaration */
// SYM_LIST(resource_declaration_list_c)
void *visit(resource_declaration_list_c *symbol) {
  TRACE("resource_declaration_list_c");

  return print_list(symbol);
}

/*
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) {
  TRACE("resource_declaration_c");

  current_resource_name = symbol->resource_name;
  symbol->resource_declaration->accept(*this);
  current_resource_name = 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) {
  TRACE("single_resource_declaration_c");

  symbol->program_configuration_list->accept(*this);
  return NULL;
}



/* helper symbol for single_resource_declaration */
//SYM_LIST(task_configuration_list_c)


/* helper symbol for single_resource_declaration */
//SYM_LIST(program_configuration_list_c)
void *visit(program_configuration_list_c *symbol) {
  TRACE("program_configuration_list_c");

  return print_list(symbol);
}


/* helper symbol for
 *  - access_path
 *  - instance_specific_init
 */
//SYM_LIST(any_fb_name_list_c)

/*  [resource_name '.'] global_var_name ['.' structure_element_name] */
//SYM_REF4(global_var_reference_c, resource_name, global_var_name, structure_element_name, unused)

/*  prev_declared_program_name '.' symbolic_variable */
//SYM_REF2(program_output_reference_c, program_name, symbolic_variable)

/*  TASK task_name task_initialization */
//SYM_REF2(task_configuration_c, task_name, task_initialization)

/*  '(' [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)

/*  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) {
  TRACE("program_configuration_c");

  s4o.print(s4o.indent_spaces);
  if (NULL != current_resource_name) {
    current_resource_name->accept(*this);
    s4o.print(".");
  }
  symbol->program_name->accept(*this);
  s4o.print(".f();\n");
  return NULL;
}

/* prog_conf_elements ',' prog_conf_element */
//SYM_LIST(prog_conf_elements_c)

/*  fb_name WITH task_name */
//SYM_REF2(fb_task_c, fb_name, task_name)
// TODO...

/*  any_symbolic_variable ASSIGN prog_data_source */
//SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source)

/* any_symbolic_variable SENDTO data_sink */
//SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, prog_data_source)

/* VAR_CONFIG instance_specific_init_list END_VAR */
//SYM_REF2(instance_specific_initializations_c, instance_specific_init_list, unused)

/* helper symbol for instance_specific_initializations */
//SYM_LIST(instance_specific_init_list_c)

/* resource_name '.' program_name '.' {fb_name '.'}
    ((variable_name [location] ':' located_var_spec_init) | (fb_name ':' fb_initialization))
*/
//SYM_REF6(instance_specific_init_c, resource_name, program_name, any_fb_name_list, variable_name, location, initialization)

/* helper symbol for instance_specific_init */
/* function_block_type_name ':=' structure_initialization */
//SYM_REF2(fb_initialization_c, function_block_type_name, structure_initialization)



}; /* generate_c_configbody_c */