--- a/stage4/generate_cc/search_var_instance_decl.cc Tue Oct 23 10:35:58 2007 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,505 +0,0 @@
-/*
- * (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)
- *
- */
-
-/* Determine the data type of a specific variable instance, including
- * function block instances.
- * A reference to the relevant variable declaration is returned.
- * The variable instance may NOT be a member of a structure of a memeber
- * of a structure of an element of an array of ...
- *
- * example:
- * window.points[1].coordinate.x
- * window.points[1].colour
- * etc... ARE NOT ALLOWED!
- *
- * This class must only be passed the name of the variable that will appear
- * in the variable declaration. In the above examples, this would be
- * 'window' !!
- *
- *
- * If you need to pass a complete name of a variable instance (such as
- * 'window.points[1].coordinate.x') use the search_varfb_instance_type_c instead!
- */
-/* Note that current_type_decl that this class returns may reference the
- * name of a type, or the type declaration itself!
- * For an example of the first, consider a variable declared as ...
- * x : AAA;
- * where the AAA type is previously declared as whatever.
- * For an example of the second, consider a variable declared as ...
- * x : array of int [10]; ----> is allowed
- *
- * If it is the first, we will return a reference to the name, if the second
- * we return a reference to the declaration!!
- */
-class search_var_instance_decl_c: public search_visitor_c {
-
- private:
- symbol_c *search_scope;
- symbol_c *search_name;
- symbol_c *current_type_decl;
-
- /* variable used to store the type of variable currently being processed... */
- /* Will contain a single value of generate_cc_vardecl_c::XXXX_vt */
- unsigned int current_vartype;
-
- public:
- search_var_instance_decl_c(symbol_c *search_scope) {
- this->current_vartype = none_vt;
- this->search_scope = search_scope;
- this->search_name = NULL;
- this->current_type_decl = NULL;
- }
-
- symbol_c *get_decl(symbol_c *variable_instance_name) {
- this->search_name = variable_instance_name;
- return (symbol_c *)search_scope->accept(*this);
- }
-
- unsigned int get_vartype() {
- return current_vartype;
- }
-
- public:
-
- /* the types of variables that need to be processed... */
- static const unsigned int none_vt = 0x0000;
- static const unsigned int input_vt = 0x0001; // VAR_INPUT
- static const unsigned int output_vt = 0x0002; // VAR_OUTPUT
- static const unsigned int inoutput_vt = 0x0004; // VAR_IN_OUT
- static const unsigned int private_vt = 0x0008; // VAR
- static const unsigned int temp_vt = 0x0010; // VAR_TEMP
- static const unsigned int external_vt = 0x0020; // VAR_EXTERNAL
- static const unsigned int global_vt = 0x0040; // VAR_GLOBAL
- static const unsigned int located_vt = 0x0080; // VAR <var_name> AT <location>
-
-
-/***************************/
-/* B 0 - Programming Model */
-/***************************/
- void *visit(library_c *symbol) {
- /* we do not want to search multiple declaration scopes,
- * so we do not visit all the functions, fucntion blocks, etc...
- */
- return NULL;
- }
-
-
-
-/******************************************/
-/* B 1.4.3 - Declaration & Initialisation */
-/******************************************/
-/* edge -> The F_EDGE or R_EDGE directive */
-// SYM_REF2(edge_declaration_c, edge, var1_list)
-// TODO
-
- void *visit(input_declarations_c *symbol) {
- current_vartype = input_vt;
- void *res = symbol->input_declaration_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* VAR_OUTPUT [RETAIN | NON_RETAIN] var_init_decl_list END_VAR */
-/* option -> may be NULL ! */
- void *visit(output_declarations_c *symbol) {
- current_vartype = output_vt;
- void *res = symbol->var_init_decl_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* VAR_IN_OUT var_declaration_list END_VAR */
- void *visit(input_output_declarations_c *symbol) {
- current_vartype = inoutput_vt;
- void *res = symbol->var_declaration_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* VAR [CONSTANT] var_init_decl_list END_VAR */
-/* option -> may be NULL ! */
-/* helper symbol for input_declarations */
- void *visit(var_declarations_c *symbol) {
- current_vartype = private_vt;
- void *res = symbol->var_init_decl_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* VAR RETAIN var_init_decl_list END_VAR */
- void *visit(retentive_var_declarations_c *symbol) {
- current_vartype = private_vt;
- void *res = symbol->var_init_decl_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* VAR [CONSTANT|RETAIN|NON_RETAIN] located_var_decl_list END_VAR */
-/* option -> may be NULL ! */
-//SYM_REF2(located_var_declarations_c, option, located_var_decl_list)
- void *visit(located_var_declarations_c *symbol) {
- current_vartype = located_vt;
- void *res = symbol->located_var_decl_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/*| VAR_EXTERNAL [CONSTANT] external_declaration_list END_VAR */
-/* option -> may be NULL ! */
-//SYM_REF2(external_var_declarations_c, option, external_declaration_list)
- void *visit(external_var_declarations_c *symbol) {
- current_vartype = external_vt;
- void *res = symbol->external_declaration_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/*| VAR_GLOBAL [CONSTANT|RETAIN] global_var_decl_list END_VAR */
-/* option -> may be NULL ! */
-//SYM_REF2(global_var_declarations_c, option, global_var_decl_list)
- void *visit(global_var_declarations_c *symbol) {
- current_vartype = global_vt;
- void *res = symbol->global_var_decl_list->accept(*this);
- if (res == NULL) {
- current_vartype = none_vt;
- }
- return res;
- }
-
-/* var1_list is one of the following...
- * simple_spec_init_c *
- * subrange_spec_init_c *
- * enumerated_spec_init_c *
- */
-// SYM_REF2(var1_init_decl_c, var1_list, spec_init)
- void *visit(var1_init_decl_c *symbol) {
- current_type_decl = symbol->spec_init;
- return symbol->var1_list->accept(*this);
- }
-
-/* var1_list ',' variable_name */
-// SYM_LIST(var1_list_c)
- void *visit(var1_list_c *symbol) {
- list_c *list = symbol;
- for(int i = 0; i < list->n; i++) {
- if (compare_identifiers(list->elements[i], search_name) == 0)
- /* by now, current_type_decl should be != NULL */
- return current_type_decl;
- }
- return NULL;
- }
-
-/* name_list ':' function_block_type_name ASSIGN structure_initialization */
-/* structure_initialization -> may be NULL ! */
- void *visit(fb_name_decl_c *symbol) {
- current_type_decl = symbol->function_block_type_name;
- return symbol->fb_name_list->accept(*this);
- }
-
-/* name_list ',' fb_name */
- void *visit(fb_name_list_c *symbol) {
- list_c *list = symbol;
- for(int i = 0; i < list->n; i++) {
- if (compare_identifiers(list->elements[i], search_name) == 0)
- /* by now, current_fb_declaration should be != NULL */
- return current_type_decl;
- }
- return NULL;
- }
-
-/* var1_list ':' array_spec_init */
-// SYM_REF2(array_var_init_decl_c, var1_list, array_spec_init)
- void *visit(array_var_init_decl_c *symbol) {
- current_type_decl = symbol->array_spec_init;
- return symbol->var1_list->accept(*this);
- }
-
-/* var1_list ':' initialized_structure */
-// SYM_REF2(structured_var_init_decl_c, var1_list, initialized_structure)
- void *visit(structured_var_init_decl_c *symbol) {
- current_type_decl = symbol->initialized_structure;
- return symbol->var1_list->accept(*this);
- }
-
-/* var1_list ':' array_specification */
-// SYM_REF2(array_var_declaration_c, var1_list, array_specification)
- void *visit(array_var_declaration_c *symbol) {
- current_type_decl = symbol->array_specification;
- return symbol->var1_list->accept(*this);
- }
-
-/* var1_list ':' structure_type_name */
-// SYM_REF2(structured_var_declaration_c, var1_list, structure_type_name)
- void *visit(structured_var_declaration_c *symbol) {
- current_type_decl = symbol->structure_type_name;
- return symbol->var1_list->accept(*this);
- }
-
-/* [variable_name] location ':' located_var_spec_init */
-/* variable_name -> may be NULL ! */
-// SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
-// TODO!!
-
-/* global_var_name ':' (simple_specification|subrange_specification|enumerated_specification|array_specification|prev_declared_structure_type_name|function_block_type_name */
-// SYM_REF2(external_declaration_c, global_var_name, specification)
- void *visit(external_declaration_c *symbol) {
- if (compare_identifiers(symbol->global_var_name, search_name) == 0)
- return symbol->specification;
- return NULL;
- }
-
-/*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
-/* type_specification ->may be NULL ! */
-// SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
- void *visit(global_var_decl_c *symbol) {
- if (symbol->type_specification != NULL) {
- current_type_decl = symbol->type_specification;
- return symbol->global_var_spec->accept(*this);
- }
- else
- return NULL;
- }
-
-/*| global_var_name location */
-//SYM_REF2(global_var_spec_c, global_var_name, location)
- void *visit(global_var_spec_c *symbol) {
- if (symbol->global_var_name != NULL && compare_identifiers(symbol->global_var_name, search_name) == 0)
- return current_type_decl;
- else
- return symbol->location->accept(*this);
- }
-
-/*| global_var_list ',' global_var_name */
-//SYM_LIST(global_var_list_c)
- void *visit(global_var_list_c *symbol) {
- list_c *list = symbol;
- for(int i = 0; i < list->n; i++) {
- if (compare_identifiers(list->elements[i], search_name) == 0)
- /* by now, current_type_decl should be != NULL */
- return current_type_decl;
- }
- return NULL;
- }
-
-/* [variable_name] location ':' located_var_spec_init */
-/* variable_name -> may be NULL ! */
-//SYM_REF4(located_var_decl_c, variable_name, location, located_var_spec_init, unused)
- void *visit(located_var_decl_c *symbol) {
- if (symbol->variable_name != NULL && compare_identifiers(symbol->variable_name, search_name) == 0) {
- return symbol->located_var_spec_init;
- }
- else
- return NULL;
- }
-
-/*| global_var_spec ':' [located_var_spec_init|function_block_type_name] */
-/* type_specification ->may be NULL ! */
-// SYM_REF2(global_var_decl_c, global_var_spec, type_specification)
-// TODO!!
-
-/*| global_var_name location */
-// SYM_REF2(global_var_spec_c, global_var_name, location)
-// TODO!!
-
-/* AT direct_variable */
-// SYM_REF2(location_c, direct_variable, unused)
-// TODO!!
-
-/*| global_var_list ',' global_var_name */
-// SYM_LIST(global_var_list_c)
-// TODO!!
-
-/* var1_list ':' single_byte_string_spec */
-// SYM_REF2(single_byte_string_var_declaration_c, var1_list, single_byte_string_spec)
- void *visit(single_byte_string_var_declaration_c *symbol) {
- current_type_decl = symbol->single_byte_string_spec;
- return symbol->var1_list->accept(*this);
- }
-
-/* STRING ['[' integer ']'] [ASSIGN single_byte_character_string] */
-/* integer ->may be NULL ! */
-/* single_byte_character_string ->may be NULL ! */
-// SYM_REF2(single_byte_string_spec_c, integer, single_byte_character_string)
-// TODO!!
-
-/* var1_list ':' double_byte_string_spec */
-// SYM_REF2(double_byte_string_var_declaration_c, var1_list, double_byte_string_spec)
- void *visit(double_byte_string_var_declaration_c *symbol) {
- current_type_decl = symbol->double_byte_string_spec;
- return symbol->var1_list->accept(*this);
- }
-
-/* WSTRING ['[' integer ']'] [ASSIGN double_byte_character_string] */
-/* integer ->may be NULL ! */
-/* double_byte_character_string ->may be NULL ! */
-// SYM_REF2(double_byte_string_spec_c, integer, double_byte_character_string)
-// TODO!!
-
-/* variable_name incompl_location ':' var_spec */
-// SYM_REF4(incompl_located_var_decl_c, variable_name, incompl_location, var_spec, unused)
-// TODO!!
-
-/* AT incompl_location_token */
-// SYM_TOKEN(incompl_location_c)
-// TODO!!
-
-
-/**************************************/
-/* B.1.5 - Program organization units */
-/**************************************/
-/***********************/
-/* B 1.5.1 - Functions */
-/***********************/
-// SYM_REF4(function_declaration_c, derived_function_name, type_name, var_declarations_list, function_body)
- void *visit(function_declaration_c *symbol) {
- /* functions have a variable named after themselves, to store
- * the variable that will be returned!!
- */
- if (compare_identifiers(symbol->derived_function_name, search_name) == 0)
- return symbol->type_name;
-
- /* no need to search through all the body, so we only
- * visit the variable declarations...!
- */
- return symbol->var_declarations_list->accept(*this);
- }
-
-/*****************************/
-/* B 1.5.2 - Function Blocks */
-/*****************************/
- void *visit(function_block_declaration_c *symbol) {
- /* no need to search through all the body, so we only
- * visit the variable declarations...!
- */
- return symbol->var_declarations->accept(*this);
- }
-
-/**********************/
-/* B 1.5.3 - Programs */
-/**********************/
- void *visit(program_declaration_c *symbol) {
- /* no need to search through all the body, so we only
- * visit the variable declarations...!
- */
- return symbol->var_declarations->accept(*this);
- }
-
-
-/********************************/
-/* B 1.7 Configuration elements */
-/********************************/
-
-/*
-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) {
- /* no need to search through all the configuration, so we only
- * visit the global variable declarations...!
- */
- if (symbol->global_var_declarations != NULL)
- return symbol->global_var_declarations->accept(*this);
- else
- return NULL;
- }
-
-/*
-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) {
- /* no need to search through all the resource, so we only
- * visit the global variable declarations...!
- */
- if (symbol->global_var_declarations != NULL)
- return symbol->global_var_declarations->accept(*this);
- else
- 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) {
- /* no need to search through all the resource,
- * and there is no global variable declarations...!
- */
- return NULL;
- }
-
-#if 0
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-SYM_REF2(symbolic_variable_c, var_name, unused)
-
-/********************************************/
-/* B.1.4.1 Directly Represented Variables */
-/********************************************/
-SYM_TOKEN(direct_variable_c)
-
-/*************************************/
-/* B.1.4.2 Multi-element Variables */
-/*************************************/
-/* subscripted_variable '[' subscript_list ']' */
-SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
-
-/* subscript_list ',' subscript */
-SYM_LIST(subscript_list_c)
-
-/* record_variable '.' field_selector */
-/* WARNING: input and/or output variables of function blocks
- * may be accessed as fields of a tructured variable!
- * Code handling a structured_variable_c must take
- * this into account!
- */
-SYM_REF2(structured_variable_c, record_variable, field_selector)
-
-
-#endif
-};
-