manuele@745: /*
manuele@745:  *  matiec - a compiler for the programming languages defined in IEC 61131-3
manuele@745:  *
manuele@745:  *  Copyright (C) 2009-2012  Mario de Sousa (msousa@fe.up.pt)
manuele@745:  *  Copyright (C) 2012       Manuele Conti  (conti.ma@alice.it)
manuele@745:  *
manuele@745:  *
manuele@745:  *  This program is free software: you can redistribute it and/or modify
manuele@745:  *  it under the terms of the GNU General Public License as published by
manuele@745:  *  the Free Software Foundation, either version 3 of the License, or
manuele@745:  *  (at your option) any later version.
manuele@745:  *
manuele@745:  *  This program is distributed in the hope that it will be useful,
manuele@745:  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
manuele@745:  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
manuele@745:  *  GNU General Public License for more details.
manuele@745:  *
manuele@745:  *  You should have received a copy of the GNU General Public License
manuele@745:  *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
manuele@745:  *
manuele@745:  *
manuele@745:  * This code is made available on the understanding that it will not be
manuele@745:  * used in safety-critical situations without a full and competent review.
manuele@745:  */
manuele@745: 
manuele@745: /*
manuele@745:  * An IEC 61131-3 compiler.
manuele@745:  *
manuele@745:  * Based on the
manuele@745:  * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
manuele@745:  *
manuele@745:  */
manuele@745: 
manuele@745: 
manuele@745: #include "derived_conversion_functions.hh"
manuele@745: #include <sstream>
manuele@745: 
manuele@745: static const int debug = 0;
manuele@745: 
manuele@745: derived_conversion_functions_c::derived_conversion_functions_c(symbol_c *ignore) {
manuele@745: 
manuele@745: }
manuele@745: 
manuele@745: derived_conversion_functions_c::~derived_conversion_functions_c(void) {
manuele@745: 
manuele@745: }
manuele@745: 
manuele@745: std::string &derived_conversion_functions_c::get_declaration(symbol_c *root) {
manuele@745:     text = "";
manuele@745:     if (NULL != root) {
manuele@745:         root->accept(*this);
manuele@745:     }
manuele@745: 
manuele@745:     return text;
manuele@745: }
manuele@745: 
manuele@745: void *derived_conversion_functions_c::visit(identifier_c *symbol) {
manuele@745:     currentToken = symbol->value;
manuele@745: 
manuele@745:     return NULL;
manuele@745: }
manuele@745: 
manuele@745: void *derived_conversion_functions_c::visit(enumerated_type_declaration_c *symbol) {
manuele@745:     std::string enumerateName;
manuele@745:     std::string functionName;
manuele@745:     std::list <std::string> enumerateValues;
manuele@745: 
manuele@745:     symbol->enumerated_type_name->accept(*this);
manuele@745:     enumerateName = currentToken;
manuele@745: 
manuele@745:     symbol->enumerated_spec_init->accept(*this);
manuele@745:     enumerateValues = currentTokenList;
manuele@745: 
manuele@745:     printStringToEnum  (enumerateName, enumerateValues);
manuele@745:     printEnumToString  (enumerateName, enumerateValues);
manuele@745:     for (size_t s = 8; s <= 64; s*= 2) {
manuele@745:         printIntegerToEnum (enumerateName, enumerateValues, true , s);
manuele@745:         printEnumToInteger (enumerateName, enumerateValues, true , s);
manuele@745:         printIntegerToEnum (enumerateName, enumerateValues, false, s);
manuele@745:         printEnumToInteger (enumerateName, enumerateValues, false, s);
manuele@745:     }
manuele@745:     if (debug) std::cout << text << std::endl;
manuele@745:     
manuele@745:     return NULL;
manuele@745: }
manuele@745: 
manuele@745: void *derived_conversion_functions_c::visit(enumerated_value_list_c *symbol) {
manuele@745:     list_c *list;
manuele@745: 
manuele@745:     currentTokenList.clear();
manuele@745:     list = (list_c *)symbol;
manuele@745:     for (int i = 0; i < list->n; i++) {
manuele@745:         list->elements[i]->accept(*this);
manuele@745:         currentTokenList.push_back(currentToken);
manuele@745:     }
manuele@745: 
manuele@745:     return NULL;
manuele@745: }
manuele@745: 
manuele@745: std::string derived_conversion_functions_c::getIntegerName(bool isSigned, size_t size) {
manuele@745:     std::string integerType = "";
manuele@745:     if (! isSigned) {
manuele@745:         integerType = "U";
manuele@745:     }
manuele@745:     switch(size) {
manuele@745:     case 8 : integerType += "S"; break;
manuele@745:     case 16:                     break;
manuele@745:     case 32: integerType += "D"; break;
manuele@745:     case 64: integerType += "L"; break;
manuele@745:     default:                     break;
manuele@745:     }
manuele@745:     integerType +="INT";
manuele@745: 
manuele@745:     return integerType;
manuele@745: }
manuele@745: 
manuele@745: void derived_conversion_functions_c::printStringToEnum  (std::string &enumerateName, std::list<std::string> &enumerateValues) {
manuele@745:     std::list <std::string>::const_iterator itr;
manuele@745:     std::string functionName;
manuele@745: 
manuele@745:     functionName = "STRING_TO_" + enumerateName;
manuele@745:     text += "FUNCTION " + functionName + " : " + enumerateName;
manuele@745:     text += "\nVAR_INPUT\nIN : STRING;\nEND_VAR\n";
manuele@745:     for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
manuele@745:        std::string value = *itr;
manuele@745:        text += "IF IN = '" + value + "' THEN\n";
manuele@745:        text += " " + functionName + " := " + value + ";\n";
manuele@745:        text += " RETURN;\n";
manuele@745:        text += "END_IF;\n";
manuele@745:     }
manuele@745:     text += "END_FUNCTION\n\n";
manuele@745: }
manuele@745: 
manuele@745: void derived_conversion_functions_c::printEnumToString  (std::string &enumerateName, std::list<std::string> &enumerateValues) {
manuele@745:     std::list <std::string>::const_iterator itr;
manuele@745:     std::string functionName;
manuele@745: 
manuele@745:     functionName = enumerateName + "_TO_STRING";
manuele@745:     text += "FUNCTION " + functionName + " : STRING";
manuele@745:     text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n";
manuele@745:     for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
manuele@745:         std::string value = *itr;
manuele@745:         text += "IF IN = " + value + " THEN\n";
manuele@745:         text += " " + functionName + " := '" + value + "';\n";
manuele@745:         text += " RETURN;\n";
manuele@745:         text += "END_IF;\n";
manuele@745:     }
manuele@745:     text += "END_FUNCTION\n\n";
manuele@745: }
manuele@745: 
manuele@745: void derived_conversion_functions_c::printIntegerToEnum (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) {
manuele@745:     std::list <std::string>::const_iterator itr;
manuele@745:     std::string functionName;
manuele@745:     std::string integerType;
manuele@745:     int count;
manuele@745: 
manuele@745:     integerType  = getIntegerName(isSigned, size);
manuele@745:     functionName = integerType + "_TO_" + enumerateName;
manuele@745:     text += "FUNCTION " + functionName + " : " + enumerateName;
manuele@745:     text += "\nVAR_INPUT\nIN : " + integerType + ";\nEND_VAR\n";
manuele@745:     count = 0;
manuele@745:     for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
manuele@745:         std::string value = *itr;
manuele@745:         std::stringstream out;
manuele@745:         out << count;
manuele@745:         text += "IF IN = " + out.str() + " THEN\n";
manuele@745:         text += " " + functionName + " := " + value + ";\n";
manuele@745:         text += " RETURN;\n";
manuele@745:         text += "END_IF;\n";
manuele@745:         count++;
manuele@745:     }
manuele@745:     text += "END_FUNCTION\n\n";
manuele@745: }
manuele@745: 
manuele@745: void derived_conversion_functions_c::printEnumToInteger (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) {
manuele@745:     std::list <std::string>::const_iterator itr;
manuele@745:     std::string functionName;
manuele@745:     std::string integerType;
manuele@745:     int count;
manuele@745: 
manuele@745:     integerType  = getIntegerName(isSigned, size);
manuele@745:     functionName = enumerateName + "_TO_" + integerType;
manuele@745:     text += "FUNCTION " + functionName + " : " + integerType;
manuele@745:     text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n";
manuele@745:     count = 0;
manuele@745:     for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
manuele@745:         std::string value = *itr;
manuele@745:         std::stringstream out;
manuele@745:         out << count;
manuele@745:         text += "IF IN = " + value + " THEN\n";
manuele@745:         text += " " + functionName + " := " + out.str() + ";\n";
manuele@745:         text += " RETURN;\n";
manuele@745:         text += "END_IF;\n";
manuele@745:         count++;
manuele@745:     }
manuele@745:     text += "END_FUNCTION\n\n";
manuele@745: }
manuele@745: 
manuele@745: 
manuele@745: