+int AbstractInterface::getWidth() {
+
+ bool ok;
+ int w = -1;
+
+ QString expr = width;
+
+ /* CAUTION :
+
+ Since VHDL allows to write std_logic_vector(O downto 0)
+ which is different from std_logic, we have to differentiate
+ a size of 1 that is really a boolean and thus a std_logic, from
+ a std_logic_vector of size 1.
+
+ For this reason, if it is boolean, 0 is returned instead of 1.
+ */
+ if (type == Boolean) {
+ return 0;
+ }
+ else if (type == Natural) {
+ w = width.toInt(&ok);
+ if (!ok) return -1;
+ }
+ else if (type == Expression) {
+
+ QList<BlockParameter*> listGenerics = owner->getGenericParameters();
+ QList<BlockParameter*> listUsers = owner->getUserParameters();
+ QList<BlockParameter*> listPorts = owner->getPortParameters();
+
+ foreach(BlockParameter* p, listUsers) {
+ QString var = "$";
+ var += p->getName();
+ if (width.contains(var)) {
+ int tmp = p->getValue().toInt(&ok);
+ if (!ok) return -1; // user parameter cannot be converted to an int
+ expr.replace(var,p->getValue().toString());
+ }
+ }
+ foreach(BlockParameter* p, listPorts) {
+ QString var = "$";
+ var += p->getName();
+ if (width.contains(var)) {
+ expr.replace(var,p->toVHDL(0,0));
+ }
+ }
+ foreach(BlockParameter* p, listGenerics) {
+ QString var = "$";
+ var += p->getName();
+ if (width.contains(var)) {
+ int tmp = p->getValue().toInt(&ok);
+ if (!ok) return -1;
+ QString s="";
+ s.setNum(tmp);
+ expr.replace(var,s);
+ }
+ }
+ // now evaluate the whole expression
+ ArithmeticEvaluator evaluator;
+
+ try {
+ evaluator.setVariableMarkers("$");
+ evaluator.setExpression(expr);
+ w = (int)(evaluator.evaluate());
+ cout << "iface size :" << w << endl;
+ }
+ catch(int e) {
+ cerr << "invalid expression in size of interface " << qPrintable(name) << " at character " << e << endl;
+ w = -1;
+ }
+ }
+ return w;
+}
+
