diff -r 9273dfc5fa7c -r a3b8925e640c stage3/range_check.cc --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/stage3/range_check.cc Tue May 15 18:59:32 2012 +0200 @@ -0,0 +1,175 @@ +/* + * matiec - a compiler for the programming languages defined in IEC 61131-3 + * + * Copyright (C) 2009-2012 Mario de Sousa (msousa@fe.up.pt) + * Copyright (C) 2012 Manuele Conti (conti.ma@alice.it) + * + * + * 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 . + * + * + * 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 compiler. + * + * Based on the + * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) + * + */ + + +/* + * TODO: + * - Check subscript values fall within allowed range. + * For the checking of subscript values to work correctly, we would need to have constant folding working too: + * array_var[8 + 99] can not be checked without constant folding. + * However, even without constant folding range check may be usefull, + * and later changing it to use the values coming out of constant folding should not be very difficult. + * + */ + + +#include "range_check.hh" + +#define FIRST_(symbol1, symbol2) (((symbol1)->first_order < (symbol2)->first_order) ? (symbol1) : (symbol2)) +#define LAST_(symbol1, symbol2) (((symbol1)->last_order > (symbol2)->last_order) ? (symbol1) : (symbol2)) + +#define STAGE3_ERROR(error_level, symbol1, symbol2, ...) { \ + if (current_display_error_level >= error_level) { \ + fprintf(stderr, "%s:%d-%d..%d-%d: error: ", \ + FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ + LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ + fprintf(stderr, __VA_ARGS__); \ + fprintf(stderr, "\n"); \ + error_count++; \ + } \ +} + + +#define STAGE3_WARNING(symbol1, symbol2, ...) { \ + fprintf(stderr, "%s:%d-%d..%d-%d: warning: ", \ + FIRST_(symbol1,symbol2)->first_file, FIRST_(symbol1,symbol2)->first_line, FIRST_(symbol1,symbol2)->first_column,\ + LAST_(symbol1,symbol2) ->last_line, LAST_(symbol1,symbol2) ->last_column);\ + fprintf(stderr, __VA_ARGS__); \ + fprintf(stderr, "\n"); \ + warning_found = true; \ +} + + +range_check_c::range_check_c(symbol_c *ignore) { + error_count = 0; + current_display_error_level = 0; +} + +range_check_c::~range_check_c(void) { +} + +int range_check_c::get_error_count() { + return error_count; +} + +void range_check_c::check_range_array_check(array_variable_c *symbol) { + int dimension_count; + symbol_c* dimension; + var_declarations_c *var_decl; + array_dimension_iterator_c* array_dimension_iterator; + + var_decl = (var_declarations_c *)search_varfb_instance_type->get_basetype_decl(symbol->subscripted_variable); + array_dimension_iterator = new array_dimension_iterator_c(var_decl); + for (dimension_count = 0; NULL != array_dimension_iterator->next(); dimension_count++); + if (dimension_count != ((list_c *)symbol->subscript_list)->n) + STAGE3_ERROR(0, symbol, symbol, "Number of dimensions does not match, Array have %d dimension(s)", dimension_count); +} + +/*********************/ +/* B 1.4 - Variables */ +/*********************/ +/*************************************/ +/* B 1.4.2 - Multi-element variables */ +/*************************************/ +void *range_check_c::visit(array_variable_c *symbol) { + check_range_array_check(symbol); + return NULL; +} + + +/**************************************/ +/* B 1.5 - Program organisation units */ +/**************************************/ +/***********************/ +/* B 1.5.1 - Functions */ +/***********************/ +void *range_check_c::visit(function_declaration_c *symbol) { + search_varfb_instance_type = new search_varfb_instance_type_c(symbol); + search_var_instance_decl = new search_var_instance_decl_c(symbol); + symbol->function_body->accept(*this); + delete search_varfb_instance_type; + delete search_var_instance_decl; + search_varfb_instance_type = NULL; + search_var_instance_decl = NULL; + return NULL; +} + +/*****************************/ +/* B 1.5.2 - Function blocks */ +/*****************************/ +void *range_check_c::visit(function_block_declaration_c *symbol) { + search_varfb_instance_type = new search_varfb_instance_type_c(symbol); + search_var_instance_decl = new search_var_instance_decl_c(symbol); + symbol->fblock_body->accept(*this); + delete search_varfb_instance_type; + delete search_var_instance_decl; + search_varfb_instance_type = NULL; + search_var_instance_decl = NULL; + return NULL; +} + +/**********************/ +/* B 1.5.3 - Programs */ +/**********************/ +void *range_check_c::visit(program_declaration_c *symbol) { + search_varfb_instance_type = new search_varfb_instance_type_c(symbol); + search_var_instance_decl = new search_var_instance_decl_c(symbol); + symbol->function_block_body->accept(*this); + delete search_varfb_instance_type; + delete search_var_instance_decl; + search_varfb_instance_type = NULL; + search_var_instance_decl = NULL; + return NULL; +} + + + +/***************************************/ +/* B.3 - Language ST (Structured Text) */ +/***************************************/ +/*********************************/ +/* B 3.2.1 Assignment Statements */ +/*********************************/ +void *range_check_c::visit(assignment_statement_c *symbol) { + symbol->l_exp->accept(*this); + symbol->r_exp->accept(*this); + return NULL; +} + + + + + + + +