void pile::add_label(const string & label)
{
if(stack.empty())
throw Erange("pile::add_label", "Cannot add a label to an empty stack");
if(label == "")
throw Erange("pile::add_label", "An empty string is an invalid label, cannot add it");
if(look_for_label(label) != stack.end())
throw Erange("pile::add_label", "Label already used in stack, cannot add it");
stack.back().labels.push_back(label);
}
void pile::clear_label(const string & label)
{
if(label == "")
throw Erange("pile::clear_label", "Empty string is an invalid label, cannot clear it");
vector<face>::iterator it = look_for_label(label);
if(it != stack.end())
{
list<string>::iterator lab = find(it->labels.begin(), it->labels.end(), label);
if(lab == it->labels.end())
throw SRC_BUG;
it->labels.erase(lab);
}
}
generic_file *pile::get_by_label(const std::string & label)
{
if(label == "")
throw SRC_BUG;
else
{
vector<face>::iterator it = look_for_label(label);
if(it == stack.end())
throw Erange("pile::get_by_label", "Label requested in generic_file stack is unknown");
if(it->ptr == NULL)
throw SRC_BUG;
return it->ptr;
}
}
void pile::push(generic_file *f, const string & label)
{
face to_add;
if(is_terminated())
throw SRC_BUG;
if(f == NULL)
throw SRC_BUG;
if(look_for_label(label) != stack.end())
throw Erange("pile::push", "Label already used while pushing a generic_file on a stack");
if(stack.empty())
set_mode(f->get_mode());
if(f->get_mode() != get_mode())
throw Erange("pile::push", "Adding to the stack of generic_file an object using an incompatible read/write mode");
to_add.ptr = f;
to_add.labels.clear();
if(label != "")
to_add.labels.push_back(label);
stack.push_back(to_add);
}