author | Manuele Conti <conti.ma@alice.it> |
Sat, 21 Apr 2012 17:42:07 +0200 | |
changeset 527 | 1d83209aabfe |
parent 279 | c0453b7f99df |
child 596 | 4efb11e44065 |
permissions | -rwxr-xr-x |
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (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, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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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 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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* |
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* This is part of the 4th stage that generates |
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* a c++ source program equivalent to the IL and ST |
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* code. |
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*/ |
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/* given a function_body_c, iterate through each |
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* function/FB call in that code. |
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*/ |
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#include "function_call_iterator.hh" |
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//#define DEBUG |
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#ifdef DEBUG |
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#define TRACE(classname) printf("\n____%s____\n",classname); |
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#else |
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#define TRACE(classname) |
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#endif |
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#define ERROR error_exit(__FILE__,__LINE__) |
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/* function defined in main.cc */ |
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extern void error_exit(const char *file_name, int line_no); |
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/* initialise the iterator object. |
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* We must be given a reference to the function declaration |
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* that will be analysed... |
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*/ |
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function_call_iterator_c::function_call_iterator_c(symbol_c *symbol) { |
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this->start_symbol = symbol; |
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next_fcall = fcall_count = 0; |
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current_finvocation = NULL; |
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current_fcall_name = NULL; |
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} |
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/* Skip to the next function call. After object creation, |
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* the object references _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 function call... |
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* |
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* Returns the function_invocation_c! |
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*/ |
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//function_invocation_c *next(void) {TRACE("function_call_iterator_c::next(): called "); |
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symbol_c *function_call_iterator_c::next(void) {TRACE("function_call_iterator_c::next(): called "); |
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fcall_count = 0; |
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next_fcall++; |
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current_finvocation = NULL; |
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current_fcall_name = NULL; |
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start_symbol->accept(*this); |
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return current_finvocation; |
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} |
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/* Returns the name of the currently referenced function invocation */ |
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identifier_c *function_call_iterator_c::fname(void) { |
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identifier_c *identifier = dynamic_cast<identifier_c *>(current_fcall_name); |
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if (identifier == NULL) ERROR; |
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return identifier; |
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} |
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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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void *function_call_iterator_c::visit(function_invocation_c *symbol) { |
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fcall_count++; |
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if (next_fcall == fcall_count) { |
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current_finvocation = symbol; |
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current_fcall_name = symbol->function_name; |
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} |
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return NULL; |
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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 *function_call_iterator_c::visit(il_function_call_c *symbol) { |
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fcall_count++; |
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if (next_fcall == fcall_count) { |
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current_finvocation = symbol; |
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current_fcall_name = symbol->function_name; |
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} |
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return NULL; |
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} |
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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 *function_call_iterator_c::visit(il_formal_funct_call_c *symbol) { |
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fcall_count++; |
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if (next_fcall == fcall_count) { |
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current_finvocation = symbol; |
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current_fcall_name = symbol->function_name; |
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} |
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return NULL; |
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} |
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