src/shell/lscp.cpp

/*
 * LSCP Shell
 *
 * Copyright (c) 2014 Christian Schoenebeck
 *
 * This program is part of LinuxSampler and released under the same terms.
 */

#include <stdio.h>
#include <stdlib.h>
#include <iostream>
#include <sstream>
#include <string.h>

#include "LSCPClient.h"
#include "KeyboardReader.h"
#include "TerminalCtrl.h"
#include "CFmt.h"
#include "CCursor.h"

#include "../common/global.h"
#include "../common/global_private.h"
#include "../common/Condition.h"

#define LSCP_DEFAULT_HOST "localhost"
#define LSCP_DEFAULT_PORT 8888

using namespace std;
using namespace LinuxSampler;

static LSCPClient* g_client = NULL;
static KeyboardReader* g_keyboardReader = NULL;
static Condition g_todo;
static String g_goodPortion;
static String g_badPortion;
static String g_suggestedPortion;
static const String g_prompt = "lscp=# ";
static std::vector<String> g_commandHistory;
static int g_commandHistoryIndex = -1;

static void printUsage() {
    cout << "lscp - The LinuxSampler Control Protocol (LSCP) Shell." << endl;
    cout << endl;
    cout << "Usage: lscp [-h HOSTNAME] [-p PORT]" << endl;
    cout << endl;
    cout << "   -h  Host name of LSCP server (default \"" << LSCP_DEFAULT_HOST << "\")." << endl;
    cout << endl;
    cout << "   -p  TCP port number of LSCP server (default " << LSCP_DEFAULT_PORT << ")." << endl;
    cout << endl;
    cout << "   --no-auto-correct  Don't perform auto correction of obvious syntax errors." << endl;
    cout << endl;
}

static void printWelcome() {
    cout << "Welcome to lscp " << VERSION << ", the LinuxSampler Control Protocol (LSCP) shell." << endl;
    cout << endl;
}

static void printPrompt() {
    cout << g_prompt << flush;
}

static int promptOffset() {
    return g_prompt.size();
}

// Called by the network reading thread, whenever new data arrived from the
// network connection.
static void onLSCPClientNewInputAvailable(LSCPClient* client) {
    g_todo.Set(true);
}

// Called by the keyboard reading thread, whenever a key stroke was received.
static void onNewKeyboardInputAvailable(KeyboardReader* reader) {
    g_todo.Set(true);
}

static void autoComplete() {
    if (g_suggestedPortion.empty()) return;
    String s;
    // let the server delete mistaken characters first
    for (int i = 0; i < g_badPortion.size(); ++i) s += '\b';
    // now add the suggested, correct characters
    s += g_suggestedPortion;
    g_suggestedPortion.clear();
    g_client->send(s);
}

static void commandFromHistory(int offset) {
    if (g_commandHistoryIndex + offset < 0 ||
        g_commandHistoryIndex + offset >= g_commandHistory.size()) return;
    g_commandHistoryIndex += offset;
    int len = g_goodPortion.size() + g_badPortion.size();
    // erase current active line
    for (int i = 0; i < len; ++i) g_client->send('\b');
    // transmit new/old line to LSCP server
    String command = g_commandHistory[g_commandHistory.size() - g_commandHistoryIndex - 1];
    g_client->send(command);
}

static void previousCommand() {
    commandFromHistory(1);
}

static void nextCommand() {
    commandFromHistory(-1);
}

static void storeCommandInHistory(const String& sCommand) {
    g_commandHistoryIndex = -1; // reset history index
    // don't save the command if the previous one was the same
    if (g_commandHistory.empty() || g_commandHistory.back() != sCommand)
        g_commandHistory.push_back(sCommand);
}

int main(int argc, char *argv[]) {
    String host = LSCP_DEFAULT_HOST;
    int port    = LSCP_DEFAULT_PORT;
    bool autoCorrect = true;

    // parse command line arguments
    for (int i = 0; i < argc; ++i) {
        String s = argv[i];
        if (s == "-h" || s == "--host") {
            if (++i >= argc) {
                printUsage();
                return -1;
            }
            host = argv[i];
        } else if (s == "-p" || s == "--port") {
            if (++i >= argc) {
                printUsage();
                return -1;
            }
            port = atoi(argv[i]);
            if (port <= 0) {
                cerr << "Error: invalid port argument \"" << argv[i] << "\"\n";
                return -1;
            }
        } else if (s == "--no-auto-correct") {
            autoCorrect = false;
        } else if (s[0] == '-') { // invalid / unknown command line argument ...
            printUsage();
            return -1;
        }
    }

    // try to connect to the sampler's LSCP server and start a thread for
    // receiving incoming network data from the sampler's LSCP server
    g_client = new LSCPClient;
    g_client->setCallback(onLSCPClientNewInputAvailable);
    if (!g_client->connect(host, port)) return -1;
    String sResponse = g_client->sendCommandSync(
        (autoCorrect) ? "SET SHELL AUTO_CORRECT 1" : "SET SHELL AUTO_CORRECT 0"
    );
    sResponse = g_client->sendCommandSync("SET SHELL INTERACT 1");
    if (sResponse.substr(0, 2) != "OK") {
        cerr << "Error: sampler too old, it does not support shell instructions\n";
        return -1;
    }
    
    printWelcome();
    printPrompt();

    // start a thread for reading from the local text input keyboard
    // (keyboard echo will be disabled as well to have a clean control on what
    // is appearing on the screen)
    g_keyboardReader = new KeyboardReader;
    g_keyboardReader->setCallback(onNewKeyboardInputAvailable);
    g_keyboardReader->startReading();

    int iKbdEscapeCharsExpected = 0;
    char kbdPrevEscapeChar;

    // main thread's loop
    while (true) {
        // sleep until either new data from the network or from keyboard arrived
        g_todo.WaitIf(false);
        // immediately unset the condition variable and unlock it
        g_todo.Set(false);
        g_todo.Unlock();

        // did network data arrive?
        while (g_client->messageComplete()) {
            String line = *g_client->popLine();
            //printf("line '%s'\n", line.c_str());
            if (line.substr(0,4) == "SHU:") {
                int code = 0, n = 0;
                int res = sscanf(line.c_str(), "SHU:%d:%n", &code, &n);
                if (res >= 1) {                    
                    String s = line.substr(n);

                    // extract portion that is already syntactically correct
                    size_t iGood = s.find(LSCP_SHK_GOOD_FRONT);
                    String sGood = s.substr(0, iGood);
                    if (sGood.find(LSCP_SHK_CURSOR) != string::npos)
                        sGood.erase(sGood.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker

                    // extract portion that was written syntactically incorrect
                    String sBad = s.substr(iGood + strlen(LSCP_SHK_GOOD_FRONT));
                    if (sBad.find(LSCP_SHK_CURSOR) != string::npos)
                        sBad.erase(sBad.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker
                    if (sBad.find(LSCP_SHK_SUGGEST_BACK) != string::npos)
                        sBad.erase(sBad.find(LSCP_SHK_SUGGEST_BACK)); // erase auto suggestion portion

                    // extract portion that is suggested for auto completion
                    String sSuggest;
                    if (s.find(LSCP_SHK_SUGGEST_BACK) != string::npos) {
                        sSuggest = s.substr(s.find(LSCP_SHK_SUGGEST_BACK) + strlen(LSCP_SHK_SUGGEST_BACK));
                        if (sSuggest.find(LSCP_SHK_CURSOR) != string::npos)
                            sSuggest.erase(sSuggest.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker
                    }

                    // extract current cursor position
                    int cursorColumn = sGood.size();
                    String sCursor = s;
                    if (sCursor.find(LSCP_SHK_GOOD_FRONT) != string::npos)
                        sCursor.erase(sCursor.find(LSCP_SHK_GOOD_FRONT), strlen(LSCP_SHK_GOOD_FRONT)); // erase good/bad marker
                    if (sCursor.find(LSCP_SHK_SUGGEST_BACK) != string::npos)
                        sCursor.erase(sCursor.find(LSCP_SHK_SUGGEST_BACK), strlen(LSCP_SHK_SUGGEST_BACK)); // erase suggestion marker
                    if (sCursor.find(LSCP_SHK_CURSOR) != string::npos)
                        cursorColumn = sCursor.find(LSCP_SHK_CURSOR);

                    // store those informations globally for the auto-completion
                    // feature
                    g_goodPortion      = sGood;
                    g_badPortion       = sBad;
                    g_suggestedPortion = sSuggest;

                    //printf("line '%s' good='%s' bad='%s' suggested='%s' cursor=%d\n", line.c_str(), sGood.c_str(), sBad.c_str(), sSuggest.c_str(), cursorColumn);

                    CCursor cursor = CCursor::now().toColumn(0).clearLine();
                    printPrompt();

                    CFmt cfmt;
                    if (code == LSCP_SHU_COMPLETE) cfmt.bold().green();
                    else cfmt.bold().white();
                    cout << sGood << flush;
                    cfmt.reset().red();
                    cout << sBad << flush;
                    cfmt.bold().yellow();
                    cout << sSuggest << flush;

                    cursor.toColumn(cursorColumn + promptOffset());
                }
            } else if (line.substr(0,2) == "OK") { // single-line response expected ...
                cout << endl << flush;
                CFmt cfmt;
                cfmt.green();
                cout << line.substr(0,2) << flush;
                cfmt.reset();
                cout << line.substr(2) << endl << flush;
                printPrompt();
            } else if (line.substr(0,3) == "WRN") { // single-line response expected ...
                cout << endl << flush;
                CFmt cfmt;
                cfmt.yellow();
                cout << line.substr(0,3) << flush;
                cfmt.reset();
                cout << line.substr(3) << endl << flush;
                printPrompt();
            } else if (line.substr(0,3) == "ERR") { // single-line response expected ...
                cout << endl << flush;
                CFmt cfmt;
                cfmt.bold().red();
                cout << line.substr(0,3) << flush;
                cfmt.reset();
                cout << line.substr(3) << endl << flush;
                printPrompt();
            } else if (g_client->multiLine()) { // multi-line response expected ...
                cout << endl << flush;
                while (true) {                   
                   cout << line << endl << flush;
                   if (line.substr(0, 1) == ".") break;
                   if (!g_client->lineAvailable()) break;
                   line = *g_client->popLine();
                }
                printPrompt();
            } else {
                cout << endl << line << endl << flush;
                printPrompt();
            }
        }

        // did keyboard input arrive?
        while (g_keyboardReader->charAvailable()) {
            char c = g_keyboardReader->popChar();

            CFmt cfmt;
            cfmt.white();
            //std::cout << c << "(" << int(c) << ")" << std::endl << std::flush;
            if (iKbdEscapeCharsExpected) { // escape sequence (still) expected now ...
                iKbdEscapeCharsExpected--;
                if (iKbdEscapeCharsExpected) kbdPrevEscapeChar = c;
                else { // escape sequence is complete ...
                    if (kbdPrevEscapeChar == 91 && c == 65) // up key
                        previousCommand();
                    else if (kbdPrevEscapeChar == 91 && c == 66) // down key
                        nextCommand();
                    else if (kbdPrevEscapeChar == 91 && c == 68) { // left key
                        //TODO: move cursor left
                    } else if (kbdPrevEscapeChar == 91 && c == 67) { // right key
                        //TODO: move cursor right
                    }
                }
                continue; // don't send this escape sequence character to LSCP server
            } else if (c == KBD_ESCAPE) { // escape sequence for special keys expected next ...
                iKbdEscapeCharsExpected = 2;
                continue; // don't send ESC character to LSCP server
            } else if (c == KBD_BACKSPACE) {
                if (promptOffset() < CCursor::now().column())
                    cout << "\b \b" << flush;
                c = '\b';    
            } else if (c == '\t') { // auto completion ...
                autoComplete();
                continue; // don't send tab character to LSCP server
            } else if (c == '\n') {
                storeCommandInHistory(g_goodPortion + g_badPortion);
            } else { // don't apply RETURN stroke yet, since the typed command might still be corrected by the sampler
                cout << c << flush;
            }

            g_client->send(c);
        }
    }

    return 0;
}
1	/*
2	* LSCP Shell
3	*
4	* Copyright (c) 2014 Christian Schoenebeck
5	*
6	* This program is part of LinuxSampler and released under the same terms.
7	*/
8
9	#include <stdio.h>
10	#include <stdlib.h>
11	#include <iostream>
12	#include <sstream>
13	#include <string.h>
14
15	#include "LSCPClient.h"
16	#include "KeyboardReader.h"
17	#include "TerminalCtrl.h"
18	#include "CFmt.h"
19	#include "CCursor.h"
20
21	#include "../common/global.h"
22	#include "../common/global_private.h"
23	#include "../common/Condition.h"
24
25	#define LSCP_DEFAULT_HOST "localhost"
26	#define LSCP_DEFAULT_PORT 8888
27
28	using namespace std;
29	using namespace LinuxSampler;
30
31	static LSCPClient* g_client = NULL;
32	static KeyboardReader* g_keyboardReader = NULL;
33	static Condition g_todo;
34	static String g_goodPortion;
35	static String g_badPortion;
36	static String g_suggestedPortion;
37	static const String g_prompt = "lscp=# ";
38	static std::vector<String> g_commandHistory;
39	static int g_commandHistoryIndex = -1;
40
41	static void printUsage() {
42	cout << "lscp - The LinuxSampler Control Protocol (LSCP) Shell." << endl;
43	cout << endl;
44	cout << "Usage: lscp [-h HOSTNAME] [-p PORT]" << endl;
45	cout << endl;
46	cout << " -h Host name of LSCP server (default \"" << LSCP_DEFAULT_HOST << "\")." << endl;
47	cout << endl;
48	cout << " -p TCP port number of LSCP server (default " << LSCP_DEFAULT_PORT << ")." << endl;
49	cout << endl;
50	cout << " --no-auto-correct Don't perform auto correction of obvious syntax errors." << endl;
51	cout << endl;
52	}
53
54	static void printWelcome() {
55	cout << "Welcome to lscp " << VERSION << ", the LinuxSampler Control Protocol (LSCP) shell." << endl;
56	cout << endl;
57	}
58
59	static void printPrompt() {
60	cout << g_prompt << flush;
61	}
62
63	static int promptOffset() {
64	return g_prompt.size();
65	}
66
67	// Called by the network reading thread, whenever new data arrived from the
68	// network connection.
69	static void onLSCPClientNewInputAvailable(LSCPClient* client) {
70	g_todo.Set(true);
71	}
72
73	// Called by the keyboard reading thread, whenever a key stroke was received.
74	static void onNewKeyboardInputAvailable(KeyboardReader* reader) {
75	g_todo.Set(true);
76	}
77
78	static void autoComplete() {
79	if (g_suggestedPortion.empty()) return;
80	String s;
81	// let the server delete mistaken characters first
82	for (int i = 0; i < g_badPortion.size(); ++i) s += '\b';
83	// now add the suggested, correct characters
84	s += g_suggestedPortion;
85	g_suggestedPortion.clear();
86	g_client->send(s);
87	}
88
89	static void commandFromHistory(int offset) {
90	if (g_commandHistoryIndex + offset < 0 \|\|
91	g_commandHistoryIndex + offset >= g_commandHistory.size()) return;
92	g_commandHistoryIndex += offset;
93	int len = g_goodPortion.size() + g_badPortion.size();
94	// erase current active line
95	for (int i = 0; i < len; ++i) g_client->send('\b');
96	// transmit new/old line to LSCP server
97	String command = g_commandHistory[g_commandHistory.size() - g_commandHistoryIndex - 1];
98	g_client->send(command);
99	}
100
101	static void previousCommand() {
102	commandFromHistory(1);
103	}
104
105	static void nextCommand() {
106	commandFromHistory(-1);
107	}
108
109	static void storeCommandInHistory(const String& sCommand) {
110	g_commandHistoryIndex = -1; // reset history index
111	// don't save the command if the previous one was the same
112	if (g_commandHistory.empty() \|\| g_commandHistory.back() != sCommand)
113	g_commandHistory.push_back(sCommand);
114	}
115
116	int main(int argc, char *argv[]) {
117	String host = LSCP_DEFAULT_HOST;
118	int port = LSCP_DEFAULT_PORT;
119	bool autoCorrect = true;
120
121	// parse command line arguments
122	for (int i = 0; i < argc; ++i) {
123	String s = argv[i];
124	if (s == "-h" \|\| s == "--host") {
125	if (++i >= argc) {
126	printUsage();
127	return -1;
128	}
129	host = argv[i];
130	} else if (s == "-p" \|\| s == "--port") {
131	if (++i >= argc) {
132	printUsage();
133	return -1;
134	}
135	port = atoi(argv[i]);
136	if (port <= 0) {
137	cerr << "Error: invalid port argument \"" << argv[i] << "\"\n";
138	return -1;
139	}
140	} else if (s == "--no-auto-correct") {
141	autoCorrect = false;
142	} else if (s[0] == '-') { // invalid / unknown command line argument ...
143	printUsage();
144	return -1;
145	}
146	}
147
148	// try to connect to the sampler's LSCP server and start a thread for
149	// receiving incoming network data from the sampler's LSCP server
150	g_client = new LSCPClient;
151	g_client->setCallback(onLSCPClientNewInputAvailable);
152	if (!g_client->connect(host, port)) return -1;
153	String sResponse = g_client->sendCommandSync(
154	(autoCorrect) ? "SET SHELL AUTO_CORRECT 1" : "SET SHELL AUTO_CORRECT 0"
155	);
156	sResponse = g_client->sendCommandSync("SET SHELL INTERACT 1");
157	if (sResponse.substr(0, 2) != "OK") {
158	cerr << "Error: sampler too old, it does not support shell instructions\n";
159	return -1;
160	}
161
162	printWelcome();
163	printPrompt();
164
165	// start a thread for reading from the local text input keyboard
166	// (keyboard echo will be disabled as well to have a clean control on what
167	// is appearing on the screen)
168	g_keyboardReader = new KeyboardReader;
169	g_keyboardReader->setCallback(onNewKeyboardInputAvailable);
170	g_keyboardReader->startReading();
171
172	int iKbdEscapeCharsExpected = 0;
173	char kbdPrevEscapeChar;
174
175	// main thread's loop
176	while (true) {
177	// sleep until either new data from the network or from keyboard arrived
178	g_todo.WaitIf(false);
179	// immediately unset the condition variable and unlock it
180	g_todo.Set(false);
181	g_todo.Unlock();
182
183	// did network data arrive?
184	while (g_client->messageComplete()) {
185	String line = *g_client->popLine();
186	//printf("line '%s'\n", line.c_str());
187	if (line.substr(0,4) == "SHU:") {
188	int code = 0, n = 0;
189	int res = sscanf(line.c_str(), "SHU:%d:%n", &code, &n);
190	if (res >= 1) {
191	String s = line.substr(n);
192
193	// extract portion that is already syntactically correct
194	size_t iGood = s.find(LSCP_SHK_GOOD_FRONT);
195	String sGood = s.substr(0, iGood);
196	if (sGood.find(LSCP_SHK_CURSOR) != string::npos)
197	sGood.erase(sGood.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker
198
199	// extract portion that was written syntactically incorrect
200	String sBad = s.substr(iGood + strlen(LSCP_SHK_GOOD_FRONT));
201	if (sBad.find(LSCP_SHK_CURSOR) != string::npos)
202	sBad.erase(sBad.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker
203	if (sBad.find(LSCP_SHK_SUGGEST_BACK) != string::npos)
204	sBad.erase(sBad.find(LSCP_SHK_SUGGEST_BACK)); // erase auto suggestion portion
205
206	// extract portion that is suggested for auto completion
207	String sSuggest;
208	if (s.find(LSCP_SHK_SUGGEST_BACK) != string::npos) {
209	sSuggest = s.substr(s.find(LSCP_SHK_SUGGEST_BACK) + strlen(LSCP_SHK_SUGGEST_BACK));
210	if (sSuggest.find(LSCP_SHK_CURSOR) != string::npos)
211	sSuggest.erase(sSuggest.find(LSCP_SHK_CURSOR), strlen(LSCP_SHK_CURSOR)); // erase cursor marker
212	}
213
214	// extract current cursor position
215	int cursorColumn = sGood.size();
216	String sCursor = s;
217	if (sCursor.find(LSCP_SHK_GOOD_FRONT) != string::npos)
218	sCursor.erase(sCursor.find(LSCP_SHK_GOOD_FRONT), strlen(LSCP_SHK_GOOD_FRONT)); // erase good/bad marker
219	if (sCursor.find(LSCP_SHK_SUGGEST_BACK) != string::npos)
220	sCursor.erase(sCursor.find(LSCP_SHK_SUGGEST_BACK), strlen(LSCP_SHK_SUGGEST_BACK)); // erase suggestion marker
221	if (sCursor.find(LSCP_SHK_CURSOR) != string::npos)
222	cursorColumn = sCursor.find(LSCP_SHK_CURSOR);
223
224	// store those informations globally for the auto-completion
225	// feature
226	g_goodPortion = sGood;
227	g_badPortion = sBad;
228	g_suggestedPortion = sSuggest;
229
230	//printf("line '%s' good='%s' bad='%s' suggested='%s' cursor=%d\n", line.c_str(), sGood.c_str(), sBad.c_str(), sSuggest.c_str(), cursorColumn);
231
232	CCursor cursor = CCursor::now().toColumn(0).clearLine();
233	printPrompt();
234
235	CFmt cfmt;
236	if (code == LSCP_SHU_COMPLETE) cfmt.bold().green();
237	else cfmt.bold().white();
238	cout << sGood << flush;
239	cfmt.reset().red();
240	cout << sBad << flush;
241	cfmt.bold().yellow();
242	cout << sSuggest << flush;
243
244	cursor.toColumn(cursorColumn + promptOffset());
245	}
246	} else if (line.substr(0,2) == "OK") { // single-line response expected ...
247	cout << endl << flush;
248	CFmt cfmt;
249	cfmt.green();
250	cout << line.substr(0,2) << flush;
251	cfmt.reset();
252	cout << line.substr(2) << endl << flush;
253	printPrompt();
254	} else if (line.substr(0,3) == "WRN") { // single-line response expected ...
255	cout << endl << flush;
256	CFmt cfmt;
257	cfmt.yellow();
258	cout << line.substr(0,3) << flush;
259	cfmt.reset();
260	cout << line.substr(3) << endl << flush;
261	printPrompt();
262	} else if (line.substr(0,3) == "ERR") { // single-line response expected ...
263	cout << endl << flush;
264	CFmt cfmt;
265	cfmt.bold().red();
266	cout << line.substr(0,3) << flush;
267	cfmt.reset();
268	cout << line.substr(3) << endl << flush;
269	printPrompt();
270	} else if (g_client->multiLine()) { // multi-line response expected ...
271	cout << endl << flush;
272	while (true) {
273	cout << line << endl << flush;
274	if (line.substr(0, 1) == ".") break;
275	if (!g_client->lineAvailable()) break;
276	line = *g_client->popLine();
277	}
278	printPrompt();
279	} else {
280	cout << endl << line << endl << flush;
281	printPrompt();
282	}
283	}
284
285	// did keyboard input arrive?
286	while (g_keyboardReader->charAvailable()) {
287	char c = g_keyboardReader->popChar();
288
289	CFmt cfmt;
290	cfmt.white();
291	//std::cout << c << "(" << int(c) << ")" << std::endl << std::flush;
292	if (iKbdEscapeCharsExpected) { // escape sequence (still) expected now ...
293	iKbdEscapeCharsExpected--;
294	if (iKbdEscapeCharsExpected) kbdPrevEscapeChar = c;
295	else { // escape sequence is complete ...
296	if (kbdPrevEscapeChar == 91 && c == 65) // up key
297	previousCommand();
298	else if (kbdPrevEscapeChar == 91 && c == 66) // down key
299	nextCommand();
300	else if (kbdPrevEscapeChar == 91 && c == 68) { // left key
301	//TODO: move cursor left
302	} else if (kbdPrevEscapeChar == 91 && c == 67) { // right key
303	//TODO: move cursor right
304	}
305	}
306	continue; // don't send this escape sequence character to LSCP server
307	} else if (c == KBD_ESCAPE) { // escape sequence for special keys expected next ...
308	iKbdEscapeCharsExpected = 2;
309	continue; // don't send ESC character to LSCP server
310	} else if (c == KBD_BACKSPACE) {
311	if (promptOffset() < CCursor::now().column())
312	cout << "\b \b" << flush;
313	c = '\b';
314	} else if (c == '\t') { // auto completion ...
315	autoComplete();
316	continue; // don't send tab character to LSCP server
317	} else if (c == '\n') {
318	storeCommandInHistory(g_goodPortion + g_badPortion);
319	} else { // don't apply RETURN stroke yet, since the typed command might still be corrected by the sampler
320	cout << c << flush;
321	}
322
323	g_client->send(c);
324	}
325	}
326
327	return 0;
328	}