# include <config.h>
#endif
+#include <stdlib.h> // atof() atoi()
+
#include <simgear/debug/logstream.hxx>
#include <simgear/xml/easyxml.hxx>
using std::string;
using std::vector;
+
\f
////////////////////////////////////////////////////////////////////////
-// Visitor class for building the property list.
+// Property list visitor, for XML parsing.
////////////////////////////////////////////////////////////////////////
-class PropVisitor : public XMLVisitor
+class PropsVisitor : public XMLVisitor
{
public:
- PropVisitor (SGPropertyList * props) : _props(props), _level(0), _ok(true) {}
- void startDocument ();
+
+ PropsVisitor (SGPropertyNode * root) : _ok(true), _root(root), _level(0) {}
+
+ void startXML ();
+ void endXML ();
void startElement (const char * name, const XMLAttributes &atts);
void endElement (const char * name);
void data (const char * s, int length);
- void warning (const char * message, int line, int col);
- void error (const char * message, int line, int col);
+ void warning (const char * message, int line, int column);
+ void error (const char * message, int line, int column);
bool isOK () const { return _ok; }
private:
- void pushState (const char * name) {
- _states.push_back(_state);
+ struct State
+ {
+ State () : node(0), type("") {}
+ State (SGPropertyNode * _node, const char * _type)
+ : node(_node), type(_type) {}
+ SGPropertyNode * node;
+ string type;
+ };
+
+ State &state () { return _state_stack[_state_stack.size() - 1]; }
+
+ void push_state (SGPropertyNode * node, const char * type) {
+ if (type == 0)
+ _state_stack.push_back(State(node, "unknown"));
+ else
+ _state_stack.push_back(State(node, type));
_level++;
- _state.name = name;
- _state.type = SGValue::UNKNOWN;
- _state.data = "";
- _state.hasChildren = false;
- _state.hasData = false;
+ _data = "";
}
- void popState () {
- _state = _states.back();
- _states.pop_back();
+ void pop_state () {
+ _state_stack.pop_back();
_level--;
}
- struct State
- {
- State () : hasChildren(false), hasData(false) {}
- string name;
- SGValue::Type type;
- string data;
- bool hasChildren;
- bool hasData;
- };
-
- SGPropertyList * _props;
- State _state;
- vector<State> _states;
- int _level;
bool _ok;
+ string _data;
+ SGPropertyNode * _root;
+ int _level;
+ vector<State> _state_stack;
+
};
void
-PropVisitor::startDocument ()
+PropsVisitor::startXML ()
{
_level = 0;
- _ok = true;
+ _state_stack.resize(0);
}
+void
+PropsVisitor::endXML ()
+{
+ _level = 0;
+ _state_stack.resize(0);
+}
void
-PropVisitor::startElement (const char * name, const XMLAttributes &atts)
+PropsVisitor::startElement (const char * name, const XMLAttributes &atts)
{
- if (!_ok)
- return;
-
- if (_level == 0 && strcmp(name, "PropertyList")) {
- _ok = false;
- FG_LOG(FG_INPUT, FG_ALERT, "XML document has root element \""
- << name << "\" instead of \"PropertyList\"");
- return;
+ if (_level == 0) {
+ push_state(_root, "");
}
- // Mixed content?
- _state.hasChildren = true;
- if (_state.hasData) {
- FG_LOG(FG_INPUT, FG_ALERT,
- "XML element has mixed elements and data in element "
- << _state.name);
- _ok = false;
- return;
+ else {
+ const char * att_n = atts.getValue("n");
+ int index = 0;
+ if (att_n != 0)
+ index = atoi(att_n);
+ push_state(state().node->getChild(name, index, true),
+ atts.getValue("type"));
}
-
- // Start a new state.
- pushState(name);
-
- // See if there's a type specified.
- const char * type = atts.getValue("type");
- if (type == 0 || !strcmp("unknown", type))
- _state.type = SGValue::UNKNOWN;
- else if (!strcmp("bool", type))
- _state.type = SGValue::BOOL;
- else if (!strcmp("int", type))
- _state.type = SGValue::INT;
- else if (!strcmp("float", type))
- _state.type = SGValue::FLOAT;
- else if (!strcmp("double", type))
- _state.type = SGValue::DOUBLE;
- else if (!strcmp("string", type))
- _state.type = SGValue::STRING;
- else
- FG_LOG(FG_INPUT, FG_ALERT, "Unrecognized type " << type
- << ", using UNKNOWN");
}
void
-PropVisitor::endElement (const char * name)
+PropsVisitor::endElement (const char * name)
{
- if (!_ok)
- return;
-
- // See if there's a property to add.
- if (_state.hasData) {
- bool status = false;
-
- // Figure out the path name.
- string path = "";
- for (int i = 2; i < _level; i++) {
- path += '/';
- path += _states[i].name;
- }
- path += '/';
- path += _state.name;
-
- // Set the value
- switch (_state.type) {
- case SGValue::BOOL:
- if (_state.data == "true" || _state.data == "TRUE") {
- status = _props->setBoolValue(path, true);
- } else if (atof(_state.data.c_str()) != 0.0) {
- status = _props->setBoolValue(path, true);
- } else {
- status =_props->setBoolValue(path, false);
- }
- break;
- case SGValue::INT :
- status = _props->setIntValue(path, atoi(_state.data.c_str()));
- break;
- case SGValue::FLOAT:
- status = _props->setFloatValue(path, atof(_state.data.c_str()));
- break;
- case SGValue::DOUBLE:
- status = _props->setDoubleValue(path, atof(_state.data.c_str()));
- break;
- case SGValue::STRING:
- status = _props->setStringValue(path, _state.data);
- break;
- default:
- status = _props->setUnknownValue(path, _state.data);
- break;
+ State &st = state();
+ bool ret;
+
+ // If there are no children, then
+ // it is a leaf value.
+ if (st.node->nChildren() == 0) {
+ if (st.type == "bool") {
+ if (_data == "true" || atoi(_data.c_str()) != 0)
+ ret = st.node->setBoolValue(true);
+ else
+ ret = st.node->setBoolValue(false);
+ } else if (st.type == "int") {
+ ret = st.node->setIntValue(atoi(_data.c_str()));
+ } else if (st.type == "float") {
+ ret = st.node->setFloatValue(atof(_data.c_str()));
+ } else if (st.type == "double") {
+ ret = st.node->setDoubleValue(atof(_data.c_str()));
+ } else if (st.type == "string") {
+ ret = st.node->setStringValue(_data);
+ } else if (st.type == "unknown") {
+ ret = st.node->setUnknownValue(_data);
+ } else {
+ FG_LOG(FG_INPUT, FG_ALERT, "Unknown data type " << st.type
+ << " assuming 'unknown'");
+ ret = st.node->setUnknownValue(_data);
}
- if (!status)
- FG_LOG(FG_INPUT, FG_ALERT, "Failed to set property "
- << path << " to " << _state.data);
}
- // Pop the stack.
- popState();
+ if (!ret)
+ FG_LOG(FG_INPUT, FG_ALERT, "readProperties: Failed to set "
+ << st.node->getPath() << " to value \""
+ << _data << " with type " << st.type);
+
+ pop_state();
}
void
-PropVisitor::data (const char * s, int length)
+PropsVisitor::data (const char * s, int length)
{
- if (!_ok)
- return;
-
- // Check if there is any non-whitespace
- if (!_state.hasData)
- for (int i = 0; i < length; i++)
- if (s[i] != ' ' && s[i] != '\t' && s[i] != '\n' && s[i] != '\r')
- _state.hasData = true;
-
- _state.data += string(s, length); // FIXME: inefficient
+ if (state().node->nChildren() == 0)
+ _data.append(string(s, length));
}
void
-PropVisitor::warning (const char * message, int line, int col)
+PropsVisitor::warning (const char * message, int line, int column)
{
- FG_LOG(FG_INPUT, FG_ALERT, "Warning importing property list: "
- << message << " (" << line << ',' << col << ')');
+ FG_LOG(FG_INPUT, FG_ALERT, "readProperties: warning: "
+ << message << " at line " << line << ", column " << column);
}
void
-PropVisitor::error (const char * message, int line, int col)
+PropsVisitor::error (const char * message, int line, int column)
{
- FG_LOG(FG_INPUT, FG_ALERT, "Error importing property list: "
- << message << " (" << line << ',' << col << ')');
+ FG_LOG(FG_INPUT, FG_ALERT, "readProperties: FATAL: "
+ << message << " at line " << line << ", column " << column);
_ok = false;
}
////////////////////////////////////////////////////////////////////////
bool
-readPropertyList (istream &input, SGPropertyList * props)
+readProperties (istream &input, SGPropertyNode * start_node)
{
- PropVisitor visitor(props);
+ PropsVisitor visitor(start_node);
return readXML(input, visitor) && visitor.isOK();
}
bool
-readPropertyList (const string &file, SGPropertyList * props)
+readProperties (const string &file, SGPropertyNode * start_node)
{
ifstream input(file.c_str());
if (input.good()) {
- return readPropertyList(input, props);
+ return readProperties(input, start_node);
} else {
FG_LOG(FG_INPUT, FG_ALERT, "Error reading property list from file "
<< file);
static bool
-writeNode (ostream &output, SGPropertyNode node, int indent)
+writeNode (ostream &output, const SGPropertyNode * node, int indent)
{
- const string &name = node.getName();
- int size = node.size();
+ const string &name = node->getName();
+ int index = node->getIndex();
+ int nChildren = node->nChildren();
- // Write out the literal value, if any.
- SGValue * value = node.getValue();
- if (value != 0) {
- SGValue::Type type = value->getType();
+ // If there is a literal value,
+ // write it first.
+ if (node->hasValue()) {
doIndent(output, indent);
- output << '<' << name;
- if (type != SGValue::UNKNOWN)
- output << " type=\"" << getTypeName(type) << '"';
- output << '>';
- writeData(output, value->getStringValue());
- output << "</" << name << '>' << endl;
+ output << '<' << name << " n=\"" << index
+ << "\" type=\"" << getTypeName(node->getType()) << "\">";
+ writeData(output, node->getStringValue());
+ output << "</" << name << '>' << endl;;
}
- // Write out the children, if any.
- if (size > 0) {
+ // If there are children, write them
+ // next.
+ if (nChildren > 0) {
doIndent(output, indent);
- output << '<' << name << '>' << endl;;
- for (int i = 0; i < size; i++) {
- writeNode(output, node.getChild(i), indent + INDENT_STEP);
- }
+ output << '<' << name << " n=\"" << index << "\">" << endl;;
+ for (int i = 0; i < nChildren; i++)
+ writeNode(output, node->getChild(i), indent + INDENT_STEP);
doIndent(output, indent);
output << "</" << name << '>' << endl;
}
+ // If there were no children and no
+ // value, at least note the presence
+ // of the node.
+ if (nChildren == 0 && !node->hasValue()) {
+ doIndent(output, indent);
+ output << '<' << name << " n=\"" << index << "\"/>" << endl;
+ }
+
return true;
}
bool
-writePropertyList (ostream &output, const SGPropertyList * props)
+writeProperties (ostream &output, const SGPropertyNode * start_node)
{
- SGPropertyNode root ("/", (SGPropertyList *)props); // FIXME
+ int nChildren = start_node->nChildren();
output << "<?xml version=\"1.0\"?>" << endl << endl;
output << "<PropertyList>" << endl;
- for (int i = 0; i < root.size(); i++) {
- writeNode(output, root.getChild(i), INDENT_STEP);
+ for (int i = 0; i < nChildren; i++) {
+ writeNode(output, start_node->getChild(i), INDENT_STEP);
}
output << "</PropertyList>" << endl;
}
bool
-writePropertyList (const string &file, const SGPropertyList * props)
+writeProperties (const string &file, const SGPropertyNode * start_node)
{
ofstream output(file.c_str());
if (output.good()) {
- return writePropertyList(output, props);
+ return writeProperties(output, start_node);
} else {
- FG_LOG(FG_INPUT, FG_ALERT, "Cannot write property list to file "
+ FG_LOG(FG_INPUT, FG_ALERT, "Cannot write properties to file "
<< file);
return false;
}
projects / simgear.git / blobdiff