public:
PropsVisitor (SGPropertyNode * root, const string &base)
- : _ok(true), _root(root), _level(0), _base(base) {}
+ : _root(root), _level(0), _base(base), _hasException(false) {}
+
+ virtual ~PropsVisitor () {}
void startXML ();
void endXML ();
void endElement (const char * name);
void data (const char * s, int length);
void warning (const char * message, int line, int column);
- void error (const char * message, int line, int column);
- bool isOK () const { return _ok; }
+ bool hasException () const { return _hasException; }
+ sg_io_exception &getException () { return _exception; }
+ void setException (const sg_io_exception &exception) {
+ _exception = exception;
+ _hasException = true;
+ }
private:
_level--;
}
- bool _ok;
string _data;
SGPropertyNode * _root;
int _level;
vector<State> _state_stack;
string _base;
+ sg_io_exception _exception;
+ bool _hasException;
};
void
else if (string(flag) == "n")
return false;
else {
- SG_LOG(SG_INPUT, SG_ALERT, "Unrecognized flag value '" << flag
- << "', assuming yes");
- return true;
+ string message = "Unrecognized flag value '";
+ message += flag;
+ message += '\'';
+ // FIXME: add location info
+ throw sg_io_exception(message, "SimGear Property Reader");
}
}
if (_level == 0) {
if (string(name) != (string)"PropertyList") {
- SG_LOG(SG_INPUT, SG_ALERT, "Root element name is " <<
- name << "; expected PropertyList");
- _ok = false;
+ string message = "Root element name is ";
+ message += name;
+ message += "; expected PropertyList";
+ throw sg_io_exception(message, "SimGear Property Reader");
}
push_state(_root, "", DEFAULT_MODE);
}
attval = atts.getValue("include");
if (attval != 0) {
SGPath path(SGPath(_base).dir());
- cerr << "Base is " << _base << endl;
- cerr << "Dir is " << SGPath(_base).dir() << endl;
path.append(attval);
- if (!readProperties(path.str(), node)) {
- SG_LOG(SG_INPUT, SG_ALERT, "Failed to read include file "
- << attval);
- _ok = false;
+ try {
+ readProperties(path.str(), node);
+ } catch (sg_io_exception &e) {
+ setException(e);
}
}
} else if (st.type == "unspecified") {
ret = st.node->setUnspecifiedValue(_data);
} else {
- SG_LOG(SG_INPUT, SG_ALERT, "Unrecognized data type " << st.type
- << " assuming 'unspecified'");
- ret = st.node->setUnspecifiedValue(_data);
+ string message = "Unrecognized data type '";
+ message += st.type;
+ message += '\'';
+ // FIXME: add location information
+ throw sg_io_exception(message, "SimGear Property Reader");
}
if (!ret)
SG_LOG(SG_INPUT, SG_ALERT, "readProperties: Failed to set "
<< message << " at line " << line << ", column " << column);
}
-void
-PropsVisitor::error (const char * message, int line, int column)
-{
- SG_LOG(SG_INPUT, SG_ALERT, "readProperties: FATAL: " <<
- message << " at line " << line << ", column " << column);
- _ok = false;
-}
-
\f
////////////////////////////////////////////////////////////////////////
* @param base A base path for resolving external include references.
* @return true if the read succeeded, false otherwise.
*/
-bool
+void
readProperties (istream &input, SGPropertyNode * start_node,
const string &base)
{
PropsVisitor visitor(start_node, base);
- return readXML(input, visitor) && visitor.isOK();
+ readXML(input, visitor, base);
+ if (visitor.hasException())
+ throw visitor.getException();
}
* @param start_node The root node for reading properties.
* @return true if the read succeeded, false otherwise.
*/
-bool
+void
readProperties (const string &file, SGPropertyNode * start_node)
{
- cerr << "Reading properties from " << file << endl;
- ifstream input(file.c_str());
- if (input.good()) {
- return readProperties(input, start_node, file);
- } else {
- SG_LOG(SG_INPUT, SG_ALERT, "Error reading property list from file "
- << file);
- return false;
- }
+ PropsVisitor visitor(start_node, file);
+ readXML(file, visitor);
+ if (visitor.hasException())
+ throw visitor.getException();
}
}
-/**
- * Write a property tree to an output stream in XML format.
- *
- * @param output The output stream.
- * @param start_node The root node to write.
- * @return true if the write succeeded, false otherwise.
- */
-bool
+void
writeProperties (ostream &output, const SGPropertyNode * start_node)
{
int nChildren = start_node->nChildren();
}
output << "</PropertyList>" << endl;
-
- return true;
}
-/**
- * Write a property tree to a file in XML format.
- *
- * @param file The destination file.
- * @param start_node The root node to write.
- * @return true if the write succeeded, false otherwise.
- */
-bool
+void
writeProperties (const string &file, const SGPropertyNode * start_node)
{
ofstream output(file.c_str());
if (output.good()) {
- return writeProperties(output, start_node);
+ writeProperties(output, start_node);
} else {
- SG_LOG(SG_INPUT, SG_ALERT, "Cannot write properties to file "
- << file);
- return false;
+ throw sg_io_exception("Cannot open file", sg_location(file));
}
}
retval = false;
break;
default:
- throw string("Unrecognized SGPropertyNode type");
+ string message = "Unknown internal SGPropertyNode type";
+ message += in->getType();
+ throw sg_error(message, "SimGear Property Reader");
}
}