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/*
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* (c) 2003 Mario de Sousa
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*
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* Offered to the public under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
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* Public License for more details.
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*
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* This code is made available on the understanding that it will not be
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* used in safety-critical situations without a full and competent review.
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*/
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/*
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* An IEC 61131-3 IL and ST compiler.
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*
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* Based on the
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
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*
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*/
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/*
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* Function call parameter iterator.
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* It will iterate through the formal parameters of a function call
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* (i.e. function calls using the foo(<param1>, <param2>, ...) syntax).
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* and/or search through the non-formal parameters of a function call
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* (i.e. function calls using the foo(<name1> = <param1>, <name2> = <param2>, ...) syntax).
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*
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* Calls to function blocks and programs are also supported.
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*
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* Note that calls to next() will only iterate through formal parameters,
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* and calls to search() will only serach through non-formal parameters.
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*/
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#include "../absyntax/visitor.hh"
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class function_call_param_iterator_c : public null_visitor_c {
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private:
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/* a pointer to the function call
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* (or function block or program call!)
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*/
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symbol_c *f_call;
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int next_param, param_count;
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identifier_c *search_param_name;
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/* Which operation of the class was called...
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* Search a parameter, or iterate to the next parameter.
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*/
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typedef enum {iterate_op, search_op} operation_t;
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operation_t current_operation;
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private:
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void *search_list(list_c *list);
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void *handle_parameter_assignment(symbol_c *variable_name, symbol_c *expression) ;
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public:
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/* start off at the first parameter once again... */
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void reset(void);
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/* initialise the iterator object.
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* We must be given a reference to the function/program/function block call
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* that will be analysed...
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*/
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function_call_param_iterator_c(symbol_c *f_call);
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/* Skip to the next parameter. After object creation,
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* the object references on parameter _before_ the first, so
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* this function must be called once to get the object to
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* reference the first parameter...
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*
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* Returns whatever is being passed to the parameter!
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*/
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symbol_c *next(void);
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/* Search for the value passed to the parameter named <param_name>... */
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symbol_c *search(symbol_c *param_name);
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private:
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/********************************/
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/* B 1.7 Configuration elements */
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/********************************/
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/*
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CONFIGURATION configuration_name
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optional_global_var_declarations
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(resource_declaration_list | single_resource_declaration)
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optional_access_declarations
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optional_instance_specific_initializations
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END_CONFIGURATION
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*/
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/*
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SYM_REF6(configuration_declaration_c, configuration_name, global_var_declarations, resource_declarations, access_declarations, instance_specific_initializations, unused)
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*/
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/* helper symbol for configuration_declaration */
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/*
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SYM_LIST(resource_declaration_list_c)
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*/
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/*
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RESOURCE resource_name ON resource_type_name
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optional_global_var_declarations
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single_resource_declaration
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END_RESOURCE
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*/
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/*
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SYM_REF4(resource_declaration_c, resource_name, resource_type_name, global_var_declarations, resource_declaration)
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*/
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/* task_configuration_list program_configuration_list */
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/*
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SYM_REF2(single_resource_declaration_c, task_configuration_list, program_configuration_list)
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*/
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/* helper symbol for single_resource_declaration */
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/*
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SYM_LIST(task_configuration_list_c)
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*/
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/* helper symbol for single_resource_declaration */
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/*
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SYM_LIST(program_configuration_list_c)
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*/
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/* helper symbol for
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* - access_path
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* - instance_specific_init
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*/
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/*
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SYM_LIST(any_fb_name_list_c)
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*/
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/* [resource_name '.'] global_var_name ['.' structure_element_name] */
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/*
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SYM_REF4(global_var_reference_c, resource_name, global_var_name, structure_element_name, unused)
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*/
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/* prev_declared_program_name '.' symbolic_variable */
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/*
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SYM_REF2(program_output_reference_c, program_name, symbolic_variable)
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*/
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/* TASK task_name task_initialization */
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/*
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SYM_REF2(task_configuration_c, task_name, task_initialization)
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*/
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/* '(' [SINGLE ASSIGN data_source ','] [INTERVAL ASSIGN data_source ','] PRIORITY ASSIGN integer ')' */
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/*
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SYM_REF4(task_initialization_c, single_data_source, interval_data_source, priority_data_source, unused)
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*/
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/* PROGRAM [RETAIN | NON_RETAIN] program_name [WITH task_name] ':' program_type_name ['(' prog_conf_elements ')'] */
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// SYM_REF6(program_configuration_c, retain_option, program_name, task_name, program_type_name, prog_conf_elements, unused)
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void *visit(program_configuration_c *symbol);
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/* prog_conf_elements ',' prog_conf_element */
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// SYM_LIST(prog_conf_elements_c)
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void *visit(prog_conf_elements_c *symbol);
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/* fb_name WITH task_name */
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/*
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SYM_REF2(fb_task_c, fb_name, task_name)
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*/
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/* any_symbolic_variable ASSIGN prog_data_source */
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// SYM_REF2(prog_cnxn_assign_c, symbolic_variable, prog_data_source)
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void *visit(prog_cnxn_assign_c *symbol);
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/* any_symbolic_variable SENDTO data_sink */
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// SYM_REF2(prog_cnxn_sendto_c, symbolic_variable, prog_data_source)
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void *visit(prog_cnxn_sendto_c *symbol);
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/* VAR_CONFIG instance_specific_init_list END_VAR */
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/*
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SYM_REF2(instance_specific_initializations_c, instance_specific_init_list, unused)
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*/
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/* helper symbol for instance_specific_initializations */
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/*
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SYM_LIST(instance_specific_init_list_c)
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*/
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/* resource_name '.' program_name '.' {fb_name '.'}
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((variable_name [location] ':' located_var_spec_init) | (fb_name ':' fb_initialization))
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*/
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/*
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SYM_REF6(instance_specific_init_c, resource_name, program_name, any_fb_name_list, variable_name, location, initialization)
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*/
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/* helper symbol for instance_specific_init */
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/* function_block_type_name ':=' structure_initialization */
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/*
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SYM_REF2(fb_initialization_c, function_block_type_name, structure_initialization)
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*/
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/****************************************/
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/* B.2 - Language IL (Instruction List) */
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/****************************************/
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/***********************************/
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/* B 2.1 Instructions and Operands */
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/***********************************/
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/* | function_name [il_operand_list] */
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// SYM_REF2(il_function_call_c, function_name, il_operand_list)
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void *visit(il_function_call_c *symbol);
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/* | function_name '(' eol_list [il_param_list] ')' */
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// SYM_REF2(il_formal_funct_call_c, function_name, il_param_list)
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void *visit(il_formal_funct_call_c *symbol);
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/* il_call_operator prev_declared_fb_name
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* | il_call_operator prev_declared_fb_name '(' ')'
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* | il_call_operator prev_declared_fb_name '(' eol_list ')'
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* | il_call_operator prev_declared_fb_name '(' il_operand_list ')'
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* | il_call_operator prev_declared_fb_name '(' eol_list il_param_list ')'
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*/
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// SYM_REF4(il_fb_call_c, il_call_operator, fb_name, il_operand_list, il_param_list)
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void *visit(il_fb_call_c *symbol);
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/* | il_operand_list ',' il_operand */
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// SYM_LIST(il_operand_list_c)
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void *visit(il_operand_list_c *symbol);
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/* | il_initial_param_list il_param_instruction */
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// SYM_LIST(il_param_list_c)
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void *visit(il_param_list_c *symbol);
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/* il_assign_operator il_operand
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* | il_assign_operator '(' eol_list simple_instr_list ')'
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*/
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// SYM_REF4(il_param_assignment_c, il_assign_operator, il_operand, simple_instr_list, unused)
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void *visit(il_param_assignment_c *symbol);
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/* il_assign_out_operator variable */
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// SYM_REF2(il_param_out_assignment_c, il_assign_out_operator, variable);
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void *visit(il_param_out_assignment_c *symbol);
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/*******************/
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/* B 2.2 Operators */
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/*******************/
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/*| [NOT] any_identifier SENDTO */
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// SYM_REF2(il_assign_out_operator_c, option, variable_name)
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void *visit(il_assign_out_operator_c *symbol);
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/***************************************/
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/* B.3 - Language ST (Structured Text) */
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/***************************************/
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/***********************/
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/* B 3.1 - Expressions */
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/***********************/
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/*
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SYM_REF2(function_invocation_c, function_name, parameter_assignment_list)
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*/
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void *visit(function_invocation_c *symbol);
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/********************/
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/* B 3.2 Statements */
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/********************/
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/*********************************/
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/* B 3.2.1 Assignment Statements */
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/*********************************/
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/*
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SYM_REF2(assignment_statement_c, l_exp, r_exp)
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*/
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/*****************************************/
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/* B 3.2.2 Subprogram Control Statements */
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/*****************************************/
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/* RETURN */
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// SYM_REF0(return_statement_c)
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/* fb_name '(' [param_assignment_list] ')' */
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/* param_assignment_list -> may be NULL ! */
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// SYM_REF2(fb_invocation_c, fb_name, param_assignment_list)
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void *visit(fb_invocation_c *symbol);
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/* helper symbol for fb_invocation */
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/* param_assignment_list ',' param_assignment */
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// SYM_LIST(param_assignment_list_c)
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void *visit(param_assignment_list_c *symbol);
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/* variable_name ASSIGN expression */
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// SYM_REF2(input_variable_param_assignment_c, variable_name, expression)
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void *visit(input_variable_param_assignment_c *symbol);
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/* [NOT] variable_name '=>' variable */
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// SYM_REF4(output_variable_param_assignment_c, not_param, variable_name, variable, unused)
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void *visit(output_variable_param_assignment_c *symbol);
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/* helper CLASS for output_variable_param_assignment */
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// SYM_REF0(not_paramassign_c)
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// TODO... ???
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}; // function_call_param_iterator_c
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