/// Assert guard that ensures the `union_` property ain't nullptr.
void _assert_not_null_union() const
throw (base_exception)
{
if (this->union_ == nullptr)
throw base_exception();
}
unsigned int conf_reader::read(const std::string & _filename, bool _clear)
{
if (_filename != "") { filename = _filename; };
if (filename != "")
{
try
{
ifstream cfile(filename.c_str());
if (!cfile) throw base_exception();
if (_clear) values.clear();
// read the file line by line, ignoring comments.
char inbuff[16*1024];
while (cfile)
{
cfile.getline(inbuff, 16*1024);
string in = inbuff;
// truncate at the start of a comment.
unsigned long int where = in.find("#");
while (where != string::npos)
{
if (in[where-1] == '\\')
{
// comment char was escaped.. ignore.
where = in.find("#",where+1);
}
else
{
// truncate the string at this point.
in.erase(where);
where = string::npos;
};
};
// see if we can parse what's left.
in = trim(in);
unsigned long int split_point = in.find_first_of("\t ");
if (split_point != string::npos)
{
// okay.. get the fields.
pair arg;
arg.first = gsub(trim(in.substr(0,split_point)),"\\#","#");
arg.second = gsub(trim(in.substr(split_point)),"\\#","#");
// is this an include directive?
if (arg.first == "*INCLUDE")
{
read(arg.second,false);
}
else if (arg.first != "")
{
values.insert(arg);
};
};
};
}
catch (...)
{
cerr << "\nProblems reading configuration file \""
<< filename << "\";\n\tdata may be incomplete." << endl;
}
};
return values.size();
};
