author | mjsousa |
Sun, 15 Feb 2015 16:07:29 +0000 | |
changeset 994 | 66dc2ef40e70 |
parent 958 | 7474d2cd1d6e |
child 1041 | 56ebe2a31b5b |
permissions | -rw-r--r-- |
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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) 2009-2012 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2012 Manuele Conti (conti.ma@alice.it) |
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* |
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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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/* |
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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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#include <sstream> |
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#include "create_enumtype_conversion_functions.hh" |
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|
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/* set to 1 to see debug info during execution */ |
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static const int debug = 0; |
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/* |
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* The create_enumtype_conversion_functions_c class generates ST source code! |
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* This code is in actual fact datatype conversion functions between user defined |
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* enumerated datatypes, and some basic datatypes. |
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* |
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* These conversion functions cannot be implemented the normal way (i.e. in the standard library) |
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* since they convert from/to a datatype that is defined by the user. So, we generate these conversions |
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* functions on the fly! |
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* (to get an idea of what the generated code looks like, see the comments in create_enumtype_conversion_functions.cc) |
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* |
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* Currently, we support conversion between the user defined enumerated datatype and STRING, |
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* SINT, INT, DINT, LINT, USINT, UINT, UDINT, ULINT (basically the ANY_INT) |
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* |
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* ST source code is generated when the method get_declaration() is called. since the |
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* create_enumtype_conversion_functions_c inherits from the iterator visitor, this method may be |
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* passed either the root of an abstract syntax tree, or sub-tree of the AST. |
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* |
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* This class will iterate through that AST, and for each enumerated type declaration, will |
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* create the apropriate conversion functions. |
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*/ |
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create_enumtype_conversion_functions_c *create_enumtype_conversion_functions_c::singleton = NULL; |
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create_enumtype_conversion_functions_c:: create_enumtype_conversion_functions_c(symbol_c *ignore) {} |
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create_enumtype_conversion_functions_c::~create_enumtype_conversion_functions_c(void) {} |
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std::string &create_enumtype_conversion_functions_c::get_declaration(symbol_c *symbol) { |
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if (NULL == singleton) singleton = new create_enumtype_conversion_functions_c(NULL); |
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if (NULL == singleton) ERROR_MSG("Out of memory. Bailing out!\n"); |
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singleton->text = ""; |
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if (NULL != symbol) |
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symbol->accept(*singleton); |
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return singleton->text; |
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} |
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/* As the name of derived datatypes and POUs are still stored as identifiers in the respective datatype and POU declaration, */ |
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/* only the indintifier_c visitor should be necessary! */ |
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void *create_enumtype_conversion_functions_c::visit( identifier_c *symbol) {currentToken = symbol->value; return NULL;} |
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void *create_enumtype_conversion_functions_c::visit( poutype_identifier_c *symbol) {ERROR; return NULL;} |
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void *create_enumtype_conversion_functions_c::visit(derived_datatype_identifier_c *symbol) {ERROR; return NULL;} |
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|
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|
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/**********************/ |
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/* B 1.3 - Data types */ |
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/**********************/ |
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/********************************/ |
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/* B 1.3.3 - Derived data types */ |
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/********************************/ |
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void *create_enumtype_conversion_functions_c::visit(enumerated_type_declaration_c *symbol) { |
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std::string enumerateName; |
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std::string functionName; |
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std::list <std::string> enumerateValues; |
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|
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symbol->enumerated_type_name->accept(*this); |
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enumerateName = currentToken; |
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symbol->enumerated_spec_init->accept(*this); |
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enumerateValues = currentTokenList; |
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|
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printStringToEnum (enumerateName, enumerateValues); |
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printEnumToString (enumerateName, enumerateValues); |
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for (size_t s = 8; s <= 64; s*= 2) { |
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printIntegerToEnum (enumerateName, enumerateValues, true , s); |
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107 |
printEnumToInteger (enumerateName, enumerateValues, true , s); |
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|
108 |
printIntegerToEnum (enumerateName, enumerateValues, false, s); |
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|
109 |
printEnumToInteger (enumerateName, enumerateValues, false, s); |
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|
110 |
} |
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111 |
if (debug) std::cout << text << std::endl; |
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|
112 |
|
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113 |
return NULL; |
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|
114 |
} |
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115 |
|
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116 |
void *create_enumtype_conversion_functions_c::visit(enumerated_value_list_c *symbol) { |
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117 |
list_c *list; |
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|
118 |
|
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119 |
currentTokenList.clear(); |
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120 |
list = (list_c *)symbol; |
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121 |
for (int i = 0; i < list->n; i++) { |
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122 |
list->elements[i]->accept(*this); |
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123 |
currentTokenList.push_back(currentToken); |
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124 |
} |
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125 |
|
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126 |
return NULL; |
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127 |
} |
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128 |
|
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129 |
/* |
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130 |
* getIntegerName function generate a integer data name from signed and size. |
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131 |
*/ |
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132 |
std::string create_enumtype_conversion_functions_c::getIntegerName(bool isSigned, size_t size) { |
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|
133 |
std::string integerType = ""; |
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134 |
if (! isSigned) { |
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135 |
integerType = "U"; |
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136 |
} |
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137 |
switch(size) { |
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138 |
case 8 : integerType += "S"; break; |
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139 |
case 16: break; |
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140 |
case 32: integerType += "D"; break; |
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141 |
case 64: integerType += "L"; break; |
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|
142 |
default: break; |
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143 |
} |
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|
144 |
integerType +="INT"; |
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|
145 |
|
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146 |
return integerType; |
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|
147 |
} |
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148 |
|
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149 |
/* |
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150 |
* printStringToEnum function print conversion function from STRING to <ENUM>: |
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|
151 |
* ST Output: |
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152 |
* |
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|
153 |
|
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154 |
FUNCTION STRING_TO_<ENUM> : <ENUM> |
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155 |
VAR_INPUT |
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156 |
IN: STRING; |
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157 |
END_VAR |
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|
158 |
IF IN = '<ENUM.VALUE_1>' THEN |
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159 |
STRING_TO_<ENUM> := <ENUM>#<ENUM.VALUE_1>; |
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|
160 |
RETURN; |
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161 |
END_IF; |
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162 |
... |
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163 |
IF IN = '<ENUM.VALU_N>' THEN |
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164 |
STRING_TO_<ENUM> := <ENUM>#<ENUM.VALUE_N>; |
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|
165 |
RETURN; |
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166 |
END_IF; |
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167 |
ENO := FALSE; |
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|
168 |
END_FUNCTION |
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169 |
|
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170 |
Note: if you change code below remember to update this comment. |
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171 |
*/ |
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172 |
void create_enumtype_conversion_functions_c::printStringToEnum (std::string &enumerateName, std::list<std::string> &enumerateValues) { |
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173 |
std::list <std::string>::const_iterator itr; |
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|
174 |
std::string functionName; |
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|
175 |
|
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176 |
functionName = "STRING_TO_" + enumerateName; |
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177 |
text += "FUNCTION " + functionName + " : " + enumerateName; |
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|
178 |
text += "\nVAR_INPUT\nIN : STRING;\nEND_VAR\n"; |
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|
179 |
for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) { |
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|
180 |
std::string value = *itr; |
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|
181 |
text += "IF IN = '" + value + "' THEN\n"; |
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182 |
text += " " + functionName + " := " + enumerateName + "#" + value + ";\n"; |
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|
183 |
text += " RETURN;\n"; |
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|
184 |
text += "END_IF;\n"; |
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185 |
} |
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|
186 |
text += "ENO := FALSE;\n"; |
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|
187 |
text += "END_FUNCTION\n\n"; |
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|
188 |
} |
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|
189 |
|
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|
190 |
/* |
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|
191 |
* printEnumToString function print conversion function from <ENUM> to STRING: |
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|
192 |
* ST Output: |
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|
193 |
* |
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|
194 |
|
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|
195 |
FUNCTION <ENUM>_TO_STRING : STRING |
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|
196 |
VAR_INPUT |
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|
197 |
IN: <ENUM>; |
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198 |
END_VAR |
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|
199 |
IF IN = <ENUM>#<ENUM.VALUE_1> THEN |
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|
200 |
<ENUM>_TO_STRING := '<ENUM>#<ENUM.VALUE_1>'; |
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|
201 |
RETURN; |
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|
202 |
END_IF; |
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|
203 |
... |
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|
204 |
IF IN = <ENUM>#<ENUM.VALUE_N> THEN |
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|
205 |
<ENUM>_TO_STRING := '<ENUM>#<ENUM.VALUE_N>'; |
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|
206 |
RETURN; |
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|
207 |
END_IF; |
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|
208 |
ENO := FALSE; |
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|
209 |
END_FUNCTION |
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210 |
|
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|
211 |
Note: if you change code below remember to update this comment. |
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|
212 |
*/ |
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|
213 |
void create_enumtype_conversion_functions_c::printEnumToString (std::string &enumerateName, std::list<std::string> &enumerateValues) { |
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|
214 |
std::list <std::string>::const_iterator itr; |
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|
215 |
std::string functionName; |
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|
216 |
|
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|
217 |
functionName = enumerateName + "_TO_STRING"; |
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|
218 |
text += "FUNCTION " + functionName + " : STRING"; |
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|
219 |
text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n"; |
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|
220 |
for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) { |
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|
221 |
std::string value = *itr; |
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|
222 |
text += "IF IN = " + enumerateName + "#" + value + " THEN\n"; |
764
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|
223 |
text += " " + functionName + " := '" + enumerateName + "#" + value + "';\n"; |
748
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|
224 |
text += " RETURN;\n"; |
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|
225 |
text += "END_IF;\n"; |
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|
226 |
} |
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|
227 |
text += "ENO := FALSE;\n"; |
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228 |
text += "END_FUNCTION\n\n"; |
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} |
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230 |
|
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231 |
/* |
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* printIntegerToEnum function print conversion function from <INTEGER> to <ENUM>: |
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* ST Output: |
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* |
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|
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FUNCTION <INTEGER>_TO_<ENUM> : <ENUM> |
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VAR_INPUT |
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IN: <INTEGER>; |
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END_VAR |
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IF IN = 1 THEN |
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<INTEGER>_TO_<ENUM> := <ENUM>#<ENUM.VALUE_1>; |
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RETURN; |
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END_IF; |
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... |
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IF IN = N THEN |
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<INTEGER>_TO_<ENUM> := <ENUM>#<ENUM.VALUE_N>; |
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247 |
RETURN; |
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END_IF; |
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ENO := FALSE; |
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250 |
END_FUNCTION |
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|
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252 |
Note: if you change code below remember to update this comment. |
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*/ |
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void create_enumtype_conversion_functions_c::printIntegerToEnum (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) { |
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std::list <std::string>::const_iterator itr; |
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std::string functionName; |
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std::string integerType; |
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int count; |
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259 |
|
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integerType = getIntegerName(isSigned, size); |
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functionName = integerType + "_TO_" + enumerateName; |
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text += "FUNCTION " + functionName + " : " + enumerateName; |
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text += "\nVAR_INPUT\nIN : " + integerType + ";\nEND_VAR\n"; |
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count = 0; |
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for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) { |
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std::string value = *itr; |
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std::stringstream out; |
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out << count; |
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text += "IF IN = " + out.str() + " THEN\n"; |
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text += " " + functionName + " := " + enumerateName + "#" + value + ";\n"; |
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text += " RETURN;\n"; |
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text += "END_IF;\n"; |
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273 |
count++; |
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} |
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text += "ENO := FALSE;\n"; |
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text += "END_FUNCTION\n\n"; |
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277 |
} |
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278 |
|
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279 |
/* |
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280 |
* printEnumToInteger function print conversion function from <ENUM> to <INTEGER>: |
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281 |
* ST Output: |
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282 |
* |
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283 |
|
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284 |
FUNCTION <ENUM>_TO_<INTEGER> : <INTEGER> |
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285 |
VAR_INPUT |
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286 |
IN: <INTEGER>; |
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END_VAR |
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288 |
IF IN = <ENUM>#<ENUM.VALUE_1> THEN |
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289 |
<ENUM>_TO_<INTEGER> := 1; |
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290 |
RETURN; |
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291 |
END_IF; |
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292 |
... |
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293 |
IF IN = <ENUM>#<ENUM.VALUE_N> THEN |
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<ENUM>_TO_<INTEGER> := N; |
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295 |
RETURN; |
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296 |
END_IF; |
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297 |
ENO := FALSE; |
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298 |
END_FUNCTION |
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|
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300 |
Note: if you change code below remember to update this comment. |
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301 |
*/ |
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302 |
void create_enumtype_conversion_functions_c::printEnumToInteger (std::string &enumerateName, std::list<std::string> &enumerateValues, bool isSigned, size_t size) { |
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303 |
std::list <std::string>::const_iterator itr; |
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|
304 |
std::string functionName; |
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|
305 |
std::string integerType; |
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|
306 |
int count; |
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|
307 |
|
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|
308 |
integerType = getIntegerName(isSigned, size); |
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|
309 |
functionName = enumerateName + "_TO_" + integerType; |
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|
310 |
text += "FUNCTION " + functionName + " : " + integerType; |
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|
311 |
text += "\nVAR_INPUT\nIN : " + enumerateName + ";\nEND_VAR\n"; |
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|
312 |
count = 0; |
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|
313 |
for (itr = enumerateValues.begin(); itr != enumerateValues.end(); ++itr) { |
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|
314 |
std::string value = *itr; |
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|
315 |
std::stringstream out; |
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|
316 |
out << count; |
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317 |
text += "IF IN = " + enumerateName + "#" + value + " THEN\n"; |
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|
318 |
text += " " + functionName + " := " + out.str() + ";\n"; |
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|
319 |
text += " RETURN;\n"; |
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320 |
text += "END_IF;\n"; |
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321 |
count++; |
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322 |
} |
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|
323 |
text += "ENO := FALSE;\n"; |
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324 |
text += "END_FUNCTION\n\n"; |
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325 |
} |
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326 |
|
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327 |
|
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328 |