command_fn commands::at (const string& cmd) {
// Note: value_type is pair<const key_type, mapped_type>
// So: iterator->first is key_type (string)
// So: iterator->second is mapped_type (command_fn)
command_map::const_iterator result = map.find (cmd);
if (result == map.end()) {
throw yshell_exn (cmd + ": no such function");
}
return result->second;
}
//do not use a subscript operator on a map
//e.g. m[k] and m is a map
// ----> searches the map from the key k
// ----> if does not find it, returns the default value
// ----> will pollute map with a bunch of default values
command_fn commands::at (const string& cmd) {
// Note: value_type is pair<const key_type, mapped_type>
// So: iterator->first is key_type (string)
// So: iterator->second is mapped_type (command_fn)
//can use "auto" instead of command_map::const_iterator
command_map::const_iterator result = map.find (cmd);
//loops through until it hits the end
if (result == map.end()) {
throw yshell_exn (cmd + ": no such function");
}
return result->second;
}
//ALL THE STUBS
void fn_cat (inode_state& state, const wordvec& words){
if(words.size() > 1) {
for (auto word = words.begin()+1; word != words.end(); word++){
bool r = ((*word)[0] == '/');
cout << state.readfile(split(*word,"/"),r) << endl;
}
}
else {
throw yshell_exn("cat:: no file given");
}
DEBUGF ('c', state);
DEBUGF ('c', words);
}
void fn_cd (inode_state& state, const wordvec& words){
DEBUGF ('c', state);
DEBUGF ('c', words);
if(words.size() > 2)
throw yshell_exn("Too many operands");
inode_ptr cwd = state.get_cwd();
state.set_cwd(cwd, words[1]);
if(words[1] == "..")
{state.directory_path_name.pop_back();}
else if (state.directory_path_name.size() > 1)
{state.directory_path_name.push_back("/"+words[1]);}
else if (state.directory_path_name.size() == 1)
{state.directory_path_name.push_back(words[1]);}
}
void fn_cat (inode_state& state, const wordvec& words){
DEBUGF ('c', state);
DEBUGF ('c', words);
if (words.size() >= 2){
inode_ptr cwd = state.get_cwd();
for(unsigned int i = 1; i<words.size(); i++){
string w(words.at(i));
cwd->locate_plain_file(cwd, w);
cout << '\n';
}
} else if (words.size() == 1){
throw yshell_exn("cat: No filename specified");
}
/*
else if(words.size() > 2){
throw yshell_exn("cat: Too many operands");
}
*/
}
