void safe_open(std::ifstream& f, const std::string& prompt, const std::string& default_name) {
for (;;) {
std::string file_name = prompt_string(prompt,default_name);
f.open(file_name.c_str());
if (!f.fail())
break;
std::cout << "Opening " << file_name << " failed." << std::endl;
}
}
/*
* Display the appropriate prompt.
*/
static void
prompt(void)
{
const char *p;
if (ungot != NULL) {
/*
* No prompt necessary if commands are from
* ungotten chars rather than from the user.
*/
return;
}
/*
* Make sure the screen is displayed.
*/
make_display();
bottompos = position(BOTTOM_PLUS_ONE);
/*
* If we've hit EOF on the last file and the -E flag is set, quit.
*/
if (get_quit_at_eof() == OPT_ONPLUS &&
eof_displayed() && !(ch_getflags() & CH_HELPFILE) &&
next_ifile(curr_ifile) == NULL_IFILE)
quit(QUIT_OK);
/*
* If the entire file is displayed and the -F flag is set, quit.
*/
if (quit_if_one_screen &&
entire_file_displayed() && !(ch_getflags() & CH_HELPFILE) &&
next_ifile(curr_ifile) == NULL_IFILE)
quit(QUIT_OK);
/*
* Select the proper prompt and display it.
*/
/*
* If the previous action was a forward movement,
* don't clear the bottom line of the display;
* just print the prompt since the forward movement guarantees
* that we're in the right position to display the prompt.
* Clearing the line could cause a problem: for example, if the last
* line displayed ended at the right screen edge without a newline,
* then clearing would clear the last displayed line rather than
* the prompt line.
*/
if (!forw_prompt)
clear_bot();
clear_cmd();
forw_prompt = 0;
p = prompt_string();
if (is_filtering())
putstr("& ");
if (p == NULL || *p == '\0') {
putchr(':');
} else {
at_enter(AT_STANDOUT);
putstr(p);
at_exit();
}
clear_eol();
}
void process_commands(std::string preface) {
for (;;) try {
std::string command = menu_prompt(preface);
if (command == "an") {
std::string n = ics::prompt_string(" Enter node name");
g.add_node(n);
}
else if (command == "ae") {
std::string o = ics::prompt_string(" Enter origin node name");
std::string d = ics::prompt_string(" Enter destination node name");
int v = ics::prompt_int (" Enter value for this edge ");
g.add_edge(o,d,v);
}
else if (command == "rn") {
std::string n = ics::prompt_string(" Enter node name");
g.remove_node(n);
}
else if (command == "re") {
std::string o = ics::prompt_string(" Enter origin node name");
std::string d = ics::prompt_string(" Enter destination node name");
g.remove_edge(o,d);
}
else if (command == "x")
g.clear();
else if (command == "=") {
ics::HashGraph<int> g2(ics::prompt_graph());
g = g2;
}
else if (command == "m")
std::cout << " empty() = " << g.empty() << std::endl;
else if (command == "#n")
std::cout << " node_count() = " << g.node_count() << std::endl;
else if (command == "#e")
std::cout << " edge_count() = " << g.edge_count() << std::endl;
else if (command == "n") {
std::string n = ics::prompt_string(" Enter node name");
std::cout << " has_node(...) = " << g.has_node(n) << std::endl;
}
else if (command == "e") {
std::string o = ics::prompt_string(" Enter origin node name");
std::string d = ics::prompt_string(" Enter destination node name");
std::cout << " has_edge(...) = " << g.has_edge(o,d) << std::endl;
}
else if (command == "v") {
std::string o = ics::prompt_string(" Enter origin node name");
std::string d = ics::prompt_string(" Enter destination node name");
std::cout << " edge_value(...) = " << g.edge_value(o,d) << std::endl;
}
else if (command == "i") {
std::string n = ics::prompt_string(" Enter node name");
std::cout << " in_degree(...) = " << g.in_degree(n) << std::endl;
}
else if (command == "o") {
std::string n = ics::prompt_string(" Enter node name");
std::cout << " out_degree(...) = " << g.out_degree(n) << std::endl;
}
else if (command == "d") {
std::string n = ics::prompt_string(" Enter node name");
std::cout << " degree(...) = " << g.degree(n) << std::endl;
}
else if (command == "<")
std::cout << preface+" << = " << g << std::endl;
else if (command == "r") {
std::cout << " g == g = " << (g == g) << std::endl;
std::cout << " g != g = " << (g != g) << std::endl;
ics::HashGraph<int> g2(ics::prompt_graph());
std::cout << " g == g2 = " << (g == g2) << std::endl;
std::cout << " g != g2 = " << (g != g2) << std::endl;
}
else if (command == "l") {
std::string separator = prompt_string(" Enter separator used in file");
std::ifstream in_file;
ics::safe_open(in_file," Enter file name to read graph from","graph.txt");
g.load(in_file,separator);
}
else if (command == "s") {
std::string separator = prompt_string(" Enter separator to use in file");
std::ofstream out_file;
out_file.open(ics::prompt_string(" Enter file name to store graph in").c_str());
if (out_file.fail())
std::cout << " Illegal file name" << std :: endl;
else
g.store(out_file,separator);
}
else if (command == "q")
break;
else
std::cout << preface+"\""+command+"\" is unknown command" << std::endl;
} catch (ics::IcsError& e) {
std::cout << preface+" " << e.what() << std::endl;
}
}
void *prompt_name(stegdisk_t *sctx)
{
return prompt_string("name");
}
void *prompt_set(stegdisk_t *sctx)
{
return prompt_string("set");
}
void *prompt_blocks(stegdisk_t *sctx)
{
return prompt_string("blocks (number, or %%age of region)");
}
