diff -r d1c1a0254e4f -r ad4265253528 stage1_2/create_enumtype_conversion_functions.cc
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/stage1_2/create_enumtype_conversion_functions.cc	Tue Nov 20 00:01:57 2012 +0100
@@ -0,0 +1,309 @@
+/*
+ *  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 <http://www.gnu.org/licenses/>.
+ *
+ *
+ * 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)
+ *
+ */
+
+#include <sstream>
+#include "create_enumtype_conversion_functions.hh"
+
+/* set to 1 to see debug info during execution */
+static const int debug = 0;
+
+/*
+ * functionDataType array contains all supported data type conversion.
+ */
+const char *create_enumtype_conversion_functions_c::functionDataType[] = {
+		"STRING",
+		"SINT"  ,
+		"INT"   ,
+		"DINT"  ,
+		"LINT"  ,
+		"USINT" ,
+		"UNIT"  ,
+		"UDINT" ,
+		"ULINT" ,
+		NULL
+};
+
+create_enumtype_conversion_functions_c::create_enumtype_conversion_functions_c(symbol_c *ignore) {
+
+}
+
+create_enumtype_conversion_functions_c::~create_enumtype_conversion_functions_c(void) {
+
+}
+
+std::string &create_enumtype_conversion_functions_c::get_declaration(symbol_c *root) {
+    text = "";
+    if (NULL != root) {
+        root->accept(*this);
+    }
+
+    return text;
+}
+
+void *create_enumtype_conversion_functions_c::visit(identifier_c *symbol) {
+    currentToken = symbol->value;
+
+    return NULL;
+}
+
+/**********************/
+/* B 1.3 - Data types */
+/**********************/
+/********************************/
+/* B 1.3.3 - Derived data types */
+/********************************/
+void *create_enumtype_conversion_functions_c::visit(enumerated_type_declaration_c *symbol) {
+    std::string enumerateName;
+    std::string functionName;
+    std::list <std::string> enumerateValues;
+
+    symbol->enumerated_type_name->accept(*this);
+    enumerateName = currentToken;
+
+    symbol->enumerated_spec_init->accept(*this);
+    enumerateValues = currentTokenList;
+
+    printStringToEnum  (enumerateName, enumerateValues);
+    printEnumToString  (enumerateName, enumerateValues);
+    for (size_t s = 8; s <= 64; s*= 2) {
+        printIntegerToEnum (enumerateName, enumerateValues, true , s);
+        printEnumToInteger (enumerateName, enumerateValues, true , s);
+        printIntegerToEnum (enumerateName, enumerateValues, false, s);
+        printEnumToInteger (enumerateName, enumerateValues, false, s);
+    }
+    if (debug) std::cout << text << std::endl;
+    
+    return NULL;
+}
+
+void *create_enumtype_conversion_functions_c::visit(enumerated_value_list_c *symbol) {
+    list_c *list;
+
+    currentTokenList.clear();
+    list = (list_c *)symbol;
+    for (int i = 0; i < list->n; i++) {
+        list->elements[i]->accept(*this);
+        currentTokenList.push_back(currentToken);
+    }
+
+    return NULL;
+}
+
+/*
+ * getIntegerName function generate a integer data name from signed and size.
+ */
+std::string create_enumtype_conversion_functions_c::getIntegerName(bool isSigned, size_t size) {
+    std::string integerType = "";
+    if (! isSigned) {
+        integerType = "U";
+    }
+    switch(size) {
+    case 8 : integerType += "S"; break;
+    case 16:                     break;
+    case 32: integerType += "D"; break;
+    case 64: integerType += "L"; break;
+    default:                     break;
+    }
+    integerType +="INT";
+
+    return integerType;
+}
+
+/*
+ * printStringToEnum function print conversion function from STRING to <ENUM>:
+ * ST Output:
+ *
+
+ FUNCTION STRING_TO_<ENUM> : <ENUM>
+  VAR_INPUT
+  IN: STRING;
+  END_VAR
+  IF IN = '<ENUM.VALUE_1>' THEN
+   STRING_TO_<ENUM> := <ENUM.VALUE_1>;
+   RETURN;
+  END_IF;
+  ...
+  IF IN = '<ENUM.VALU_N>' THEN
+   STRING_TO_<ENUM> := <ENUM.VALUE_N>;
+   RETURN;
+  END_IF;
+  END_FUNCTION
+
+ */
+void create_enumtype_conversion_functions_c::printStringToEnum  (std::string &enumerateName, std::list<std::string> &enumerateValues) {
+    std::list <std::string>::const_iterator itr;
+    std::string functionName;
+
+    functionName = "STRING_TO_" + enumerateName;
+    text += "FUNCTION " + functionName + " : " + enumerateName;
+    text += "\nVAR_INPUT\nIN : STRING;\nEND_VAR\n";
+    for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
+       std::string value = *itr;
+       text += "IF IN = '" + value + "' THEN\n";
+       text += " " + functionName + " := " + value + ";\n";
+       text += " RETURN;\n";
+       text += "END_IF;\n";
+    }
+    text += "END_FUNCTION\n\n";
+}
+
+/*
+ * printEnumToString function print conversion function from <ENUM> to STRING:
+ * ST Output:
+ *
+
+ FUNCTION <ENUM>_TO_STRING : STRING
+  VAR_INPUT
+  IN: <ENUM>;
+  END_VAR
+  IF IN = <ENUM.VALUE_1> THEN
+   <ENUM>_TO_STRING := '<ENUM.VALUE_1>';
+   RETURN;
+  END_IF;
+  ...
+  IF IN = <ENUM.VALUE_N> THEN
+   <ENUM>_TO_STRING := '<ENUM.VALUE_N>';
+   RETURN;
+  END_IF;
+  END_FUNCTION
+
+ */
+void create_enumtype_conversion_functions_c::printEnumToString  (std::string &enumerateName, std::list<std::string> &enumerateValues) {
+    std::list <std::string>::const_iterator itr;
+    std::string functionName;
+
+    functionName = enumerateName + "_TO_STRING";
+    text += "FUNCTION " + functionName + " : STRING";
+    text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n";
+    for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
+        std::string value = *itr;
+        text += "IF IN = " + value + " THEN\n";
+        text += " " + functionName + " := '" + value + "';\n";
+        text += " RETURN;\n";
+        text += "END_IF;\n";
+    }
+    text += "END_FUNCTION\n\n";
+}
+
+/*
+ * printIntegerToEnum function print conversion function from <INTEGER> to <ENUM>:
+ * ST Output:
+ *
+
+ FUNCTION <INTEGER>_TO_<ENUM> : <ENUM>
+  VAR_INPUT
+  IN: <INTEGER>;
+  END_VAR
+  IF IN = 1 THEN
+   <INTEGER>_TO_<ENUM> := <ENUM.VALUE_1>;
+   RETURN;
+  END_IF;
+  ...
+  IF IN = N THEN
+   <INTEGER>_TO_<ENUM> := <ENUM.VALUE_N>;
+   RETURN;
+  END_IF;
+  END_FUNCTION
+
+ */
+void create_enumtype_conversion_functions_c::printIntegerToEnum (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) {
+    std::list <std::string>::const_iterator itr;
+    std::string functionName;
+    std::string integerType;
+    int count;
+
+    integerType  = getIntegerName(isSigned, size);
+    functionName = integerType + "_TO_" + enumerateName;
+    text += "FUNCTION " + functionName + " : " + enumerateName;
+    text += "\nVAR_INPUT\nIN : " + integerType + ";\nEND_VAR\n";
+    count = 0;
+    for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
+        std::string value = *itr;
+        std::stringstream out;
+        out << count;
+        text += "IF IN = " + out.str() + " THEN\n";
+        text += " " + functionName + " := " + value + ";\n";
+        text += " RETURN;\n";
+        text += "END_IF;\n";
+        count++;
+    }
+    text += "END_FUNCTION\n\n";
+}
+
+/*
+ * printEnumToInteger function print conversion function from <ENUM> to <INTEGER>:
+ * ST Output:
+ *
+
+ FUNCTION <ENUM>_TO_<INTEGER> : <INTEGER>
+  VAR_INPUT
+  IN: <INTEGER>;
+  END_VAR
+  IF IN = <ENUM.VALUE_1> THEN
+   <ENUM>_TO_<INTEGER> := 1;
+   RETURN;
+  END_IF;
+  ...
+  IF IN = <ENUM.VALUE_N> THEN
+   <ENUM>_TO_<INTEGER> := N;
+   RETURN;
+  END_IF;
+  END_FUNCTION
+
+ */
+void create_enumtype_conversion_functions_c::printEnumToInteger (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) {
+    std::list <std::string>::const_iterator itr;
+    std::string functionName;
+    std::string integerType;
+    int count;
+
+    integerType  = getIntegerName(isSigned, size);
+    functionName = enumerateName + "_TO_" + integerType;
+    text += "FUNCTION " + functionName + " : " + integerType;
+    text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n";
+    count = 0;
+    for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) {
+        std::string value = *itr;
+        std::stringstream out;
+        out << count;
+        text += "IF IN = " + value + " THEN\n";
+        text += " " + functionName + " := " + out.str() + ";\n";
+        text += " RETURN;\n";
+        text += "END_IF;\n";
+        count++;
+    }
+    text += "END_FUNCTION\n\n";
+}
+
+
+