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/*
** Copyright (C) 1991, 1997 Free Software Foundation, Inc.
**
** This file is part of TACK.
**
** TACK is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2, or (at your option)
** any later version.
**
** TACK is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with TACK; see the file COPYING. If not, write to
** the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
** Boston, MA 02110-1301, USA
*/
#include <tack.h>
#include <time.h>
MODULE_ID("$Id: sync.c,v 1.10 2009/12/26 21:39:52 tom Exp $")
/* terminal-synchronization and performance tests */
static void sync_home(struct test_list *, int *, int *);
static void sync_lines(struct test_list *, int *, int *);
static void sync_clear(struct test_list *, int *, int *);
static void sync_summary(struct test_list *, int *, int *);
static struct test_list sync_test_list[] = {
{MENU_NEXT, 0, 0, 0, "b) baud rate test", sync_home, 0},
{MENU_NEXT, 0, 0, 0, "l) scroll performance", sync_lines, 0},
{MENU_NEXT, 0, 0, 0, "c) clear screen performance", sync_clear, 0},
{MENU_NEXT, 0, 0, 0, "p) summary of results", sync_summary, 0},
{0, 0, 0, 0, txt_longer_test_time, longer_test_time, 0},
{0, 0, 0, 0, txt_shorter_test_time, shorter_test_time, 0},
{MENU_LAST, 0, 0, 0, 0, 0, 0}
};
struct test_menu sync_menu = {
0, 'n', 0,
"Performance tests", "perf", "n) run standard tests",
sync_test, sync_test_list, 0, 0, 0
};
int tty_can_sync; /* TRUE if tty_sync_error() returned FALSE */
static int tty_newline_rate; /* The number of newlines per second */
static int tty_clear_rate; /* The number of clear-screens per second */
unsigned long tty_cps; /* The number of characters per second */
#define TTY_ACK_SIZE 64
static int ACK_terminator; /* terminating ACK character */
static int ACK_length; /* length of ACK string */
static const char *tty_ENQ; /* enquire string */
static char tty_ACK[TTY_ACK_SIZE]; /* ACK response, set by tty_sync_error() */
/*****************************************************************************
*
* Terminal synchronization.
*
* These functions handle the messy business of enq-ack handshaking
* for timing purposes.
*
*****************************************************************************/
int
tty_sync_error(void)
{
int ch, trouble, ack;
trouble = FALSE;
for (;;) {
tt_putp(tty_ENQ); /* send ENQ */
ch = getnext(STRIP_PARITY);
event_start(TIME_SYNC); /* start the timer */
/*
The timer doesn't start until we get the first character.
After that I expect to get the remaining characters of
the acknowledge string in a short period of time. If
that is not true then these characters are coming from
the user and we need to send the ENQ sequence out again.
*/
for (ack = 0; ; ) {
if (ack < TTY_ACK_SIZE - 2) {
tty_ACK[ack] = (char) ch;
tty_ACK[ack + 1] = '\0';
}
if (ch == ACK_terminator) {
return trouble;
}
if (++ack >= ACK_length) {
return trouble;
}
ch = getnext(STRIP_PARITY);
if (event_time(TIME_SYNC) > 400000) {
break;
}
}
set_attr(0); /* just in case */
put_crlf();
if (trouble) {
/* The terminal won't sync. Life is not good. */
return TRUE;
}
put_str(" -- sync -- ");
trouble = TRUE;
}
}
/*
** flush_input()
**
** Throw away any output.
*/
void
flush_input(void)
{
if (tty_can_sync == SYNC_TESTED && ACK_terminator >= 0) {
(void) tty_sync_error();
} else {
spin_flush();
}
}
/*
** probe_enq_ok()
**
** does the terminal do enq/ack handshaking?
*/
static void
probe_enq_ok(void)
{
int tc, len, ulen;
put_str("Testing ENQ/ACK, standby...");
fflush(stdout);
can_test("u8 u9", FLAG_TESTED);
#ifdef user9
tty_ENQ = user9 ? user9 : "\005";
#else
tty_ENQ = "\005";
#endif
tc_putp(tty_ENQ);
event_start(TIME_SYNC); /* start the timer */
read_key(tty_ACK, TTY_ACK_SIZE - 1);
if (event_time(TIME_SYNC) > 400000 || tty_ACK[0] == '\0') {
/* These characters came from the user. Sigh. */
tty_can_sync = SYNC_FAILED;
ptext("\nThis program expects the ENQ sequence to be");
ptext(" answered with the ACK character. This will help");
ptext(" the program reestablish synchronization when");
ptextln(" the terminal is overrun with data.");
ptext("\nENQ sequence from (u9): ");
putln(expand(tty_ENQ));
ptext("ACK received: ");
putln(expand(tty_ACK));
#ifdef user8
len = user8 ? (int) strlen(user8) : 0;
#else
len = 0;
#endif
sprintf(temp, "Length of ACK %d. Expected length of ACK %d.",
(int) strlen(tty_ACK), len);
ptextln(temp);
#ifdef user8
if (len) {
temp[0] = user8[len - 1];
temp[1] = '\0';
ptext("Terminating character found in (u8): ");
putln(expand(temp));
}
#endif
return;
}
tty_can_sync = SYNC_TESTED;
if ((len = (int) strlen(tty_ACK)) == 1) {
/* single character acknowledge string */
ACK_terminator = tty_ACK[0];
ACK_length = 4096;
return;
}
tc = tty_ACK[len - 1];
#ifdef user8
if (user8) {
ulen = (int) strlen(user8);
if (tc == user8[ulen - 1]) {
/* ANSI style acknowledge string */
ACK_terminator = tc;
ACK_length = 4096;
return;
}
}
#endif
/* fixed length acknowledge string */
ACK_length = len;
ACK_terminator = -2;
}
/*
** verify_time()
**
** verify that the time tests are ready to run.
** If the baud rate is not set then compute it.
*/
void
verify_time(void)
{
int status, ch;
if (tty_can_sync == SYNC_FAILED) {
return;
}
probe_enq_ok();
put_crlf();
if (tty_can_sync == SYNC_TESTED) {
put_crlf();
if (ACK_terminator >= 0) {
ptext("ACK terminating character: ");
temp[0] = (char) ACK_terminator;
temp[1] = '\0';
ptextln(expand(temp));
} else {
sprintf(temp, "Fixed length ACK, %d characters",
ACK_length);
ptextln(temp);
}
}
if (tty_baud_rate == 0) {
sync_home(&sync_test_list[0], &status, &ch);
}
}
/*****************************************************************************
*
* Terminal performance tests
*
* Find out how fast the terminal can:
* 1) accept characters
* 2) scroll the screen
* 3) clear the screen
*
*****************************************************************************/
/*
** sync_home(test_list, status, ch)
**
** Baudrate test
*/
static void
sync_home(
struct test_list *t,
int *state,
int *ch)
{
int j, k;
unsigned long rate;
if (!cursor_home && !cursor_address && !row_address) {
ptext("Terminal can not home cursor. ");
generic_done_message(t, state, ch);
return;
}
if (skip_pad_test(t, state, ch,
"(home) Start baudrate search")) {
return;
}
pad_test_startup(1);
do {
go_home();
for (j = 1; j < lines; j++) {
for (k = 0; k < columns; k++) {
if (k & 0xF) {
put_this(letter);
} else {
put_this('.');
}
}
SLOW_TERMINAL_EXIT;
}
NEXT_LETTER;
} while(still_testing());
pad_test_shutdown(t, auto_right_margin == 0);
/* note: tty_frame_size is the real framesize times two.
This takes care of half bits. */
rate = ((tx_cps * (unsigned long) tty_frame_size) >> 1);
if (rate > tty_baud_rate) {
tty_baud_rate = rate;
}
if (tx_cps > tty_cps) {
tty_cps = tx_cps;
}
sprintf(temp, "%lu characters per second. Baudrate %d ", tx_cps, j);
ptext(temp);
generic_done_message(t, state, ch);
}
/*
** sync_lines(test_list, status, ch)
**
** How many newlines/second?
*/
static void
sync_lines(
struct test_list *t,
int *state,
int *ch)
{
int j;
if (skip_pad_test(t, state, ch,
"(nel) Start scroll performance test")) {
return;
}
pad_test_startup(0);
repeats = 100;
do {
sprintf(temp, "%d", test_complete);
put_str(temp);
put_newlines(repeats);
} while(still_testing());
pad_test_shutdown(t, 0);
j = sliding_scale(tx_count[0], 1000000, usec_run_time);
if (j > tty_newline_rate) {
tty_newline_rate = j;
}
sprintf(temp, "%d linefeeds per second. ", j);
ptext(temp);
generic_done_message(t, state, ch);
}
/*
** sync_clear(test_list, status, ch)
**
** How many clear-screens/second?
*/
static void
sync_clear(
struct test_list *t,
int *state,
int *ch)
{
int j;
if (!clear_screen) {
ptext("Terminal can not clear-screen. ");
generic_done_message(t, state, ch);
return;
}
if (skip_pad_test(t, state, ch,
"(clear) Start clear-screen performance test")) {
return;
}
pad_test_startup(0);
repeats = 20;
do {
sprintf(temp, "%d", test_complete);
put_str(temp);
for (j = 0; j < repeats; j++) {
put_clear();
}
} while(still_testing());
pad_test_shutdown(t, 0);
j = sliding_scale(tx_count[0], 1000000, usec_run_time);
if (j > tty_clear_rate) {
tty_clear_rate = j;
}
sprintf(temp, "%d clear-screens per second. ", j);
ptext(temp);
generic_done_message(t, state, ch);
}
/*
** sync_summary(test_list, status, ch)
**
** Print out the test results.
*/
static void
sync_summary(
struct test_list *t,
int *state,
int *ch)
{
char size[32];
put_crlf();
ptextln("Terminal size characters/sec linefeeds/sec clears/sec");
sprintf(size, "%dx%d", columns, lines);
sprintf(temp, "%-10s%-11s%11lu %11d %11d", tty_basename, size,
tty_cps, tty_newline_rate, tty_clear_rate);
ptextln(temp);
generic_done_message(t, state, ch);
}
/*
** sync_test(menu)
**
** Run at the beginning of the pad tests and function key tests
*/
void
sync_test(
struct test_menu *menu)
{
control_init();
if (tty_can_sync == SYNC_NOT_TESTED) {
verify_time();
}
if (menu->menu_title) {
put_crlf();
ptextln(menu->menu_title);
}
}
/*
** sync_handshake(test_list, status, ch)
**
** Test or retest the ENQ/ACK handshake
*/
void
sync_handshake(
struct test_list *t GCC_UNUSED,
int *state GCC_UNUSED,
int *ch GCC_UNUSED)
{
tty_can_sync = SYNC_NOT_TESTED;
verify_time();
}