diff -r 64334c5a00b1 -r 38d6eb056260 stage4/generate_c/search_base_type.cc --- a/stage4/generate_c/search_base_type.cc Sat May 30 16:42:41 2009 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,242 +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 on which another data type is based on. - * If a new default initial value is given, we DO NOT consider it a - * new base class, and continue looking further! - * - * E.g. TYPE new_int_t : INT; END_TYPE; - * TYPE new_int2_t : INT = 2; END_TYPE; - * TYPE new_subr_t : INT (4..5); END_TYPE; - * - * new_int_t is really an INT!! - * new_int2_t is also really an INT!! - * new_subr_t is also really an INT!! - */ -class search_base_type_c: public null_visitor_c { - private: - symbol_c *current_type_name; - bool is_subrange; - bool is_enumerated; - - public: - search_base_type_c(void) {current_type_name = NULL;} - - public: - void *visit(identifier_c *type_name) { - this->current_type_name = type_name; - /* look up the type declaration... */ - symbol_c *type_decl = type_symtable.find_value(type_name); - if (type_decl == type_symtable.end_value()) - /* Type declaration not found!! */ - ERROR; - - return type_decl->accept(*this); - } - - bool type_is_subrange(symbol_c* type_decl) { - this->is_subrange = false; - type_decl->accept(*this); - return this->is_subrange; - } - - bool type_is_enumerated(symbol_c* type_decl) { - this->is_enumerated = false; - type_decl->accept(*this); - return this->is_enumerated; - } - -/***********************************/ -/* B 1.3.1 - Elementary Data Types */ -/***********************************/ - void *visit(time_type_name_c *symbol) {return (void *)symbol;} - void *visit(bool_type_name_c *symbol) {return (void *)symbol;} - void *visit(sint_type_name_c *symbol) {return (void *)symbol;} - void *visit(int_type_name_c *symbol) {return (void *)symbol;} - void *visit(dint_type_name_c *symbol) {return (void *)symbol;} - void *visit(lint_type_name_c *symbol) {return (void *)symbol;} - void *visit(usint_type_name_c *symbol) {return (void *)symbol;} - void *visit(uint_type_name_c *symbol) {return (void *)symbol;} - void *visit(udint_type_name_c *symbol) {return (void *)symbol;} - void *visit(ulint_type_name_c *symbol) {return (void *)symbol;} - void *visit(real_type_name_c *symbol) {return (void *)symbol;} - void *visit(lreal_type_name_c *symbol) {return (void *)symbol;} - void *visit(date_type_name_c *symbol) {return (void *)symbol;} - void *visit(tod_type_name_c *symbol) {return (void *)symbol;} - void *visit(dt_type_name_c *symbol) {return (void *)symbol;} - void *visit(byte_type_name_c *symbol) {return (void *)symbol;} - void *visit(word_type_name_c *symbol) {return (void *)symbol;} - void *visit(dword_type_name_c *symbol) {return (void *)symbol;} - void *visit(lword_type_name_c *symbol) {return (void *)symbol;} - void *visit(string_type_name_c *symbol) {return (void *)symbol;} - void *visit(wstring_type_name_c *symbol) {return (void *)symbol;} - void *visit(constant_int_type_name_c *symbol) {return (void *)symbol;} - void *visit(constant_real_type_name_c *symbol) {return (void *)symbol;} - void *visit(direct_variable_type_name_c *symbol) {return (void *)symbol;} - /******************************************************/ - /* Extensions to the base standard as defined in */ - /* "Safety Software Technical Specification, */ - /* Part 1: Concepts and Function Blocks, */ - /* Version 1.0 – Official Release" */ - /* by PLCopen - Technical Committee 5 - 2006-01-31 */ - /******************************************************/ - void *visit(safebool_type_name_c *symbol) {return (void *)symbol;} - -/********************************/ -/* B 1.3.3 - Derived data types */ -/********************************/ -/* simple_type_name ':' simple_spec_init */ - void *visit(simple_type_declaration_c *symbol) { - return symbol->simple_spec_init->accept(*this); - } -/* simple_specification ASSIGN constant */ - void *visit(simple_spec_init_c *symbol) { - return symbol->simple_specification->accept(*this); - } - -/* subrange_type_name ':' subrange_spec_init */ - void *visit(subrange_type_declaration_c *symbol) { - return symbol->subrange_spec_init->accept(*this); - } - -/* subrange_specification ASSIGN signed_integer */ - void *visit(subrange_spec_init_c *symbol) { - this->is_subrange = true; - return symbol->subrange_specification->accept(*this); - } - -/* integer_type_name '(' subrange')' */ - void *visit(subrange_specification_c *symbol) { - return symbol->integer_type_name->accept(*this); - } - -/* signed_integer DOTDOT signed_integer */ - void *visit(subrange_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* enumerated_type_name ':' enumerated_spec_init */ - void *visit(enumerated_type_declaration_c *symbol) { - this->current_type_name = symbol->enumerated_type_name; - return symbol->enumerated_spec_init->accept(*this); - } - -/* enumerated_specification ASSIGN enumerated_value */ - void *visit(enumerated_spec_init_c *symbol) { - this->is_enumerated = true; - return symbol->enumerated_specification->accept(*this); - } - -/* helper symbol for enumerated_specification->enumerated_spec_init */ -/* enumerated_value_list ',' enumerated_value */ - void *visit(enumerated_value_list_c *symbol) { - if (NULL == this->current_type_name) ERROR; - return (void *)this->current_type_name; - } - -/* enumerated_type_name '#' identifier */ -// SYM_REF2(enumerated_value_c, type, value) - void *visit(enumerated_value_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* identifier ':' array_spec_init */ - void *visit(array_type_declaration_c *symbol) { - this->current_type_name = symbol->identifier; - return symbol->array_spec_init->accept(*this); - } - -/* array_specification [ASSIGN array_initialization} */ -/* array_initialization may be NULL ! */ - void *visit(array_spec_init_c *symbol) { - return symbol->array_specification->accept(*this); - } - -/* ARRAY '[' array_subrange_list ']' OF non_generic_type_name */ - void *visit(array_specification_c *symbol) { - if (NULL == this->current_type_name) ERROR; - return symbol->non_generic_type_name->accept(*this); - } - -/* helper symbol for array_specification */ -/* array_subrange_list ',' subrange */ - void *visit(array_subrange_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* array_initialization: '[' array_initial_elements_list ']' */ -/* helper symbol for array_initialization */ -/* array_initial_elements_list ',' array_initial_elements */ - void *visit(array_initial_elements_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* integer '(' [array_initial_element] ')' */ -/* array_initial_element may be NULL ! */ - void *visit(array_initial_elements_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* structure_type_name ':' structure_specification */ - /* NOTE: structure_specification will point to either a - * initialized_structure_c - * OR A - * structure_element_declaration_list_c - */ - void *visit(structure_type_declaration_c *symbol) { - this->current_type_name = symbol->structure_type_name; - return symbol->structure_specification->accept(*this); - } - -/* structure_type_name ASSIGN structure_initialization */ -/* structure_initialization may be NULL ! */ - void *visit(initialized_structure_c *symbol) { - return symbol->structure_type_name->accept(*this); - } - -/* helper symbol for structure_declaration */ -/* structure_declaration: STRUCT structure_element_declaration_list END_STRUCT */ -/* structure_element_declaration_list structure_element_declaration ';' */ - void *visit(structure_element_declaration_list_c *symbol) { - if (NULL == this->current_type_name) ERROR; - return (void *)symbol; - } - -/* structure_element_name ':' *_spec_init */ - void *visit(structure_element_declaration_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* helper symbol for structure_initialization */ -/* structure_initialization: '(' structure_element_initialization_list ')' */ -/* structure_element_initialization_list ',' structure_element_initialization */ - void *visit(structure_element_initialization_list_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* structure_element_name ASSIGN value */ - void *visit(structure_element_initialization_c *symbol) {ERROR; return NULL;} /* should never get called... */ - -/* string_type_name ':' elementary_string_type_name string_type_declaration_size string_type_declaration_init */ -/* -SYM_REF4(string_type_declaration_c, string_type_name, - elementary_string_type_name, - string_type_declaration_size, - string_type_declaration_init) // may be == NULL! -*/ - void *visit(string_type_declaration_c *symbol) {return symbol;} - - -}; - - - -