/**
* Search this environment frame for a procedure. If the procedure is not found, recursively
* search the calling frames.
*
* @param name the procedure name
* @return the procedure
*/
public LogoFunc getFunction(String name) {
LogoFunc f = null;
f = (LogoFunc) functions.get(name);
if (f == null) {
if (this.parent == null) return null;
else return parent.getFunction(name);
} else return f;
}
/**
* Search the current environment frame for the variable If the variable is not found, recursively
* search the calling frames.
*
* @param var the variable to lookup in the environment
* @return the variable
*/
public String getVariable(String var) {
String v = null;
v = (String) variables.get(var);
if (v == null) {
if (this.parent == null) return null;
else return parent.getVariable(var);
} else {
return v;
}
}