89 lines
1.8 KiB
C++
89 lines
1.8 KiB
C++
#include "dbg-lib/command_interpreter.h"
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using namespace dbg;
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using namespace std;
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//----------------------------------------------------------------
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namespace {
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class command_interpreter_impl : public command_interpreter {
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public:
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typedef std::shared_ptr<command_interpreter> ptr;
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command_interpreter_impl(std::istream &in, std::ostream &out)
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: in_(in),
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out_(out),
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exit_(false) {
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}
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void register_command(std::string const &str, command::ptr cmd) {
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commands_.insert(make_pair(str, cmd));
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}
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void enter_main_loop() {
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while (!exit_)
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do_once();
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}
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void exit_main_loop() {
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exit_ = true;
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}
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private:
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void do_once();
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std::istream &in_;
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std::ostream &out_;
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std::map <std::string, command::ptr> commands_;
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bool exit_;
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};
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//--------------------------------
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strings read_input(std::istream &in)
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{
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using namespace boost::algorithm;
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std::string input;
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getline(in, input);
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strings toks;
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split(toks, input, is_any_of(" \t"), token_compress_on);
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return toks;
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}
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}
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//----------------------------------------------------------------
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void command_interpreter_impl::do_once()
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{
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if (in_.eof())
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throw runtime_error("input closed");
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out_ << "> ";
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strings args = read_input(in_);
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std::map<std::string, command::ptr>::iterator it;
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it = commands_.find(args[0]);
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if (it == commands_.end())
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out_ << "Unrecognised command" << endl;
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else {
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try {
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it->second->exec(args, out_);
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} catch (std::exception &e) {
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cerr << e.what() << endl;
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}
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}
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}
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//----------------------------------------------------------------
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command_interpreter::ptr
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dbg::create_command_interpreter(std::istream &in, std::ostream &out)
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{
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return command_interpreter::ptr(new command_interpreter_impl(in, out));
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}
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//----------------------------------------------------------------
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