conti@559: /* conti@559: * matiec - a compiler for the programming languages defined in IEC 61131-3 conti@559: * conti@559: * Copyright (C) 2009-2012 Mario de Sousa (msousa@fe.up.pt) conti@559: * Copyright (C) 2012 Manuele Conti (conti.ma@alice.it) conti@559: * conti@559: * conti@559: * This program is free software: you can redistribute it and/or modify conti@559: * it under the terms of the GNU General Public License as published by conti@559: * the Free Software Foundation, either version 3 of the License, or conti@559: * (at your option) any later version. conti@559: * conti@559: * This program is distributed in the hope that it will be useful, conti@559: * but WITHOUT ANY WARRANTY; without even the implied warranty of conti@559: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the conti@559: * GNU General Public License for more details. conti@559: * conti@559: * You should have received a copy of the GNU General Public License conti@559: * along with this program. If not, see . conti@559: * conti@559: * conti@559: * This code is made available on the understanding that it will not be conti@559: * used in safety-critical situations without a full and competent review. conti@559: */ conti@559: conti@559: /* conti@559: * An IEC 61131-3 compiler. conti@559: * conti@559: * Based on the conti@559: * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) conti@559: * conti@559: */ conti@559: conti@559: conti@559: /* conti@559: * TODO: conti@559: * - Check subscript values fall within allowed range. conti@559: * For the checking of subscript values to work correctly, we would need to have constant folding working too: conti@559: * array_var[8 + 99] can not be checked without constant folding. conti@559: * However, even without constant folding range check may be usefull, conti@559: * and later changing it to use the values coming out of constant folding should not be very difficult. conti@559: * conti@559: */ conti@559: conti@559: conti@559: #include "range_check.hh" conti@559: conti@559: #define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order) ? (symbol1) : (symbol2)) conti@559: #define LAST_(symbol1, symbol2) (((symbol1)->last_order > (symbol2)->last_order) ? (symbol1) : (symbol2)) conti@559: conti@559: #define STAGE3_ERROR(error_level, symbol1, symbol2, ...) { \ conti@559: if (current_display_error_level >= error_level) { \ conti@559: fprintf(stderr, "%s:%d-%d..%d-%d: error: ", \ conti@559: FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ conti@559: LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ conti@559: fprintf(stderr, __VA_ARGS__); \ conti@559: fprintf(stderr, "\n"); \ conti@559: error_count++; \ conti@559: } \ conti@559: } conti@559: conti@559: conti@559: #define STAGE3_WARNING(symbol1, symbol2, ...) { \ conti@559: fprintf(stderr, "%s:%d-%d..%d-%d: warning: ", \ conti@559: FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ conti@559: LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ conti@559: fprintf(stderr, __VA_ARGS__); \ conti@559: fprintf(stderr, "\n"); \ conti@559: warning_found = true; \ conti@559: } conti@559: conti@559: conti@559: range_check_c::range_check_c(symbol_c *ignore) { conti@559: error_count = 0; conti@559: current_display_error_level = 0; conti@559: } conti@559: conti@559: range_check_c::~range_check_c(void) { conti@559: } conti@559: conti@559: int range_check_c::get_error_count() { conti@559: return error_count; conti@559: } conti@559: conti@559: void range_check_c::check_range_array_check(array_variable_c *symbol) { conti@559: int dimension_count; conti@559: symbol_c* dimension; conti@559: var_declarations_c *var_decl; conti@559: array_dimension_iterator_c* array_dimension_iterator; conti@559: conti@559: var_decl = (var_declarations_c *)search_varfb_instance_type->get_basetype_decl(symbol->subscripted_variable); conti@559: array_dimension_iterator = new array_dimension_iterator_c(var_decl); conti@559: for (dimension_count = 0; NULL != array_dimension_iterator->next(); dimension_count++); conti@559: if (dimension_count != ((list_c *)symbol->subscript_list)->n) conti@559: STAGE3_ERROR(0, symbol, symbol, "Number of dimensions does not match, Array have %d dimension(s)", dimension_count); conti@559: } conti@559: conti@559: /*********************/ conti@559: /* B 1.4 - Variables */ conti@559: /*********************/ conti@559: /*************************************/ conti@559: /* B 1.4.2 - Multi-element variables */ conti@559: /*************************************/ conti@559: void *range_check_c::visit(array_variable_c *symbol) { conti@559: check_range_array_check(symbol); conti@559: return NULL; conti@559: } conti@559: conti@559: conti@559: /**************************************/ conti@559: /* B 1.5 - Program organisation units */ conti@559: /**************************************/ conti@559: /***********************/ conti@559: /* B 1.5.1 - Functions */ conti@559: /***********************/ conti@559: void *range_check_c::visit(function_declaration_c *symbol) { conti@559: search_varfb_instance_type = new search_varfb_instance_type_c(symbol); conti@559: search_var_instance_decl = new search_var_instance_decl_c(symbol); conti@559: symbol->function_body->accept(*this); conti@559: delete search_varfb_instance_type; conti@559: delete search_var_instance_decl; conti@559: search_varfb_instance_type = NULL; conti@559: search_var_instance_decl = NULL; conti@559: return NULL; conti@559: } conti@559: conti@559: /*****************************/ conti@559: /* B 1.5.2 - Function blocks */ conti@559: /*****************************/ conti@559: void *range_check_c::visit(function_block_declaration_c *symbol) { conti@559: search_varfb_instance_type = new search_varfb_instance_type_c(symbol); conti@559: search_var_instance_decl = new search_var_instance_decl_c(symbol); conti@559: symbol->fblock_body->accept(*this); conti@559: delete search_varfb_instance_type; conti@559: delete search_var_instance_decl; conti@559: search_varfb_instance_type = NULL; conti@559: search_var_instance_decl = NULL; conti@559: return NULL; conti@559: } conti@559: conti@559: /**********************/ conti@559: /* B 1.5.3 - Programs */ conti@559: /**********************/ conti@559: void *range_check_c::visit(program_declaration_c *symbol) { conti@559: search_varfb_instance_type = new search_varfb_instance_type_c(symbol); conti@559: search_var_instance_decl = new search_var_instance_decl_c(symbol); conti@559: symbol->function_block_body->accept(*this); conti@559: delete search_varfb_instance_type; conti@559: delete search_var_instance_decl; conti@559: search_varfb_instance_type = NULL; conti@559: search_var_instance_decl = NULL; conti@559: return NULL; conti@559: } conti@559: conti@559: conti@559: conti@559: /***************************************/ conti@559: /* B.3 - Language ST (Structured Text) */ conti@559: /***************************************/ conti@559: /*********************************/ conti@559: /* B 3.2.1 Assignment Statements */ conti@559: /*********************************/ conti@559: void *range_check_c::visit(assignment_statement_c *symbol) { conti@559: symbol->l_exp->accept(*this); conti@559: symbol->r_exp->accept(*this); conti@559: return NULL; conti@559: } conti@559: conti@559: conti@559: conti@559: conti@559: conti@559: conti@559: conti@559: