lib_mvcur.c

ncurses 库 可能有用酒用 没用就算了 我觉得还可以用

    diff = after.tv_usec - before.tv_usec
	+ (after.tv_sec - before.tv_sec) * 1000000;
    if (!profiling)
	(void) fprintf(stderr,
		       "onscreen: %d microsec, %f 28.8Kbps char-equivalents\n",
		       (int) diff, diff / 288);
#endif /* MAIN */

    if (usecost != INFINITY) {
	TPUTS_TRACE("mvcur");
	tputs(buffer, 1, _nc_outch);
	SP->_cursrow = ynew;
	SP->_curscol = xnew;
	return (OK);
    } else
	return (ERR);
}

NCURSES_EXPORT(int)
mvcur(int yold, int xold, int ynew, int xnew)
/* optimized cursor move from (yold, xold) to (ynew, xnew) */
{
    NCURSES_CH_T oldattr;
    int code;

    TR(TRACE_CALLS | TRACE_MOVE, (T_CALLED("mvcur(%d,%d,%d,%d)"),
				  yold, xold, ynew, xnew));

    if (SP == 0) {
	code = ERR;
    } else if (yold == ynew && xold == xnew) {
	code = OK;
    } else {

	/*
	 * Most work here is rounding for terminal boundaries getting the
	 * column position implied by wraparound or the lack thereof and
	 * rolling up the screen to get ynew on the screen.
	 */
	if (xnew >= screen_columns) {
	    ynew += xnew / screen_columns;
	    xnew %= screen_columns;
	}

	/*
	 * Force restore even if msgr is on when we're in an alternate
	 * character set -- these have a strong tendency to screw up the CR &
	 * LF used for local character motions!
	 */
	oldattr = SCREEN_ATTRS(SP);
	if ((AttrOf(oldattr) & A_ALTCHARSET)
	    || (AttrOf(oldattr) && !move_standout_mode)) {
	    TR(TRACE_CHARPUT, ("turning off (%#lx) %s before move",
			       (unsigned long) AttrOf(oldattr),
			       _traceattr(AttrOf(oldattr))));
	    (void) VIDATTR(A_NORMAL, 0);
	}

	if (xold >= screen_columns) {
	    int l;

	    if (SP->_nl) {
		l = (xold + 1) / screen_columns;
		yold += l;
		if (yold >= screen_lines)
		    l -= (yold - screen_lines - 1);

		if (l > 0) {
		    if (carriage_return) {
			TPUTS_TRACE("carriage_return");
			putp(carriage_return);
		    } else
			_nc_outch('\r');
		    xold = 0;

		    while (l > 0) {
			if (newline) {
			    TPUTS_TRACE("newline");
			    putp(newline);
			} else
			    _nc_outch('\n');
			l--;
		    }
		}
	    } else {
		/*
		 * If caller set nonl(), we cannot really use newlines to
		 * position to the next row.
		 */
		xold = -1;
		yold = -1;
	    }
	}

	if (yold > screen_lines - 1)
	    yold = screen_lines - 1;
	if (ynew > screen_lines - 1)
	    ynew = screen_lines - 1;

	/* destination location is on screen now */
	code = onscreen_mvcur(yold, xold, ynew, xnew, TRUE);

	/*
	 * Restore attributes if we disabled them before moving.
	 */
	if (!SameAttrOf(oldattr, SCREEN_ATTRS(SP))) {
	    TR(TRACE_CHARPUT, ("turning on (%#lx) %s after move",
			       (unsigned long) AttrOf(oldattr),
			       _traceattr(AttrOf(oldattr))));
	    (void) VIDATTR(AttrOf(oldattr), GetPair(oldattr));
	}
    }
    returnCode(code);
}

#if defined(TRACE) || defined(NCURSES_TEST)
NCURSES_EXPORT_VAR(int) _nc_optimize_enable = OPTIMIZE_ALL;
#endif

#if defined(MAIN) || defined(NCURSES_TEST)
/****************************************************************************
 *
 * Movement optimizer test code
 *
 ****************************************************************************/

#include <tic.h>
#include <dump_entry.h>

NCURSES_EXPORT_VAR(const char *) _nc_progname = "mvcur";

static unsigned long xmits;

/* these override lib_tputs.c */
NCURSES_EXPORT(int)
tputs(const char *string, int affcnt GCC_UNUSED, int (*outc) (int) GCC_UNUSED)
/* stub tputs() that dumps sequences in a visible form */
{
    if (profiling)
	xmits += strlen(string);
    else
	(void) fputs(_nc_visbuf(string), stdout);
    return (OK);
}

NCURSES_EXPORT(int)
putp(const char *string)
{
    return (tputs(string, 1, _nc_outch));
}

NCURSES_EXPORT(int)
_nc_outch(int ch)
{
    putc(ch, stdout);
    return OK;
}

NCURSES_EXPORT(int)
delay_output(int ms GCC_UNUSED)
{
    return OK;
}

static char tname[PATH_MAX];

static void
load_term(void)
{
    (void) setupterm(tname, STDOUT_FILENO, NULL);
}

static int
roll(int n)
{
    int i, j;

    i = (RAND_MAX / n) * n;
    while ((j = rand()) >= i)
	continue;
    return (j % n);
}

int
main(int argc GCC_UNUSED, char *argv[]GCC_UNUSED)
{
    (void) strcpy(tname, termname());
    load_term();
    _nc_setupscreen(lines, columns, stdout);
    baudrate();

    _nc_mvcur_init();
    NC_BUFFERED(FALSE);

    (void) puts("The mvcur tester.  Type ? for help");

    fputs("smcup:", stdout);
    putchar('\n');

    for (;;) {
	int fy, fx, ty, tx, n, i;
	char buf[BUFSIZ], capname[BUFSIZ];

	(void) fputs("> ", stdout);
	(void) fgets(buf, sizeof(buf), stdin);

	if (buf[0] == '?') {
	    (void) puts("?                -- display this help message");
	    (void)
		puts("fy fx ty tx      -- (4 numbers) display (fy,fx)->(ty,tx) move");
	    (void) puts("s[croll] n t b m -- display scrolling sequence");
	    (void)
		printf("r[eload]         -- reload terminal info for %s\n",
		       termname());
	    (void)
		puts("l[oad] <term>    -- load terminal info for type <term>");
	    (void) puts("d[elete] <cap>   -- delete named capability");
	    (void) puts("i[nspect]        -- display terminal capabilities");
	    (void)
		puts("c[ost]           -- dump cursor-optimization cost table");
	    (void) puts("o[optimize]      -- toggle movement optimization");
	    (void)
		puts("t[orture] <num>  -- torture-test with <num> random moves");
	    (void) puts("q[uit]           -- quit the program");
	} else if (sscanf(buf, "%d %d %d %d", &fy, &fx, &ty, &tx) == 4) {
	    struct timeval before, after;

	    putchar('"');

	    gettimeofday(&before, NULL);
	    mvcur(fy, fx, ty, tx);
	    gettimeofday(&after, NULL);

	    printf("\" (%ld msec)\n",
		   (long) (after.tv_usec - before.tv_usec
			   + (after.tv_sec - before.tv_sec)
			   * 1000000));
	} else if (sscanf(buf, "s %d %d %d %d", &fy, &fx, &ty, &tx) == 4) {
	    struct timeval before, after;

	    putchar('"');

	    gettimeofday(&before, NULL);
	    _nc_scrolln(fy, fx, ty, tx);
	    gettimeofday(&after, NULL);

	    printf("\" (%ld msec)\n",
		   (long) (after.tv_usec - before.tv_usec + (after.tv_sec -
							     before.tv_sec)
			   * 1000000));
	} else if (buf[0] == 'r') {
	    (void) strcpy(tname, termname());
	    load_term();
	} else if (sscanf(buf, "l %s", tname) == 1) {
	    load_term();
	} else if (sscanf(buf, "d %s", capname) == 1) {
	    struct name_table_entry const *np = _nc_find_entry(capname,
							       _nc_info_hash_table);

	    if (np == NULL)
		(void) printf("No such capability as \"%s\"\n", capname);
	    else {
		switch (np->nte_type) {
		case BOOLEAN:
		    cur_term->type.Booleans[np->nte_index] = FALSE;
		    (void)
			printf("Boolean capability `%s' (%d) turned off.\n",
			       np->nte_name, np->nte_index);
		    break;

		case NUMBER:
		    cur_term->type.Numbers[np->nte_index] = ABSENT_NUMERIC;
		    (void) printf("Number capability `%s' (%d) set to -1.\n",
				  np->nte_name, np->nte_index);
		    break;

		case STRING:
		    cur_term->type.Strings[np->nte_index] = ABSENT_STRING;
		    (void) printf("String capability `%s' (%d) deleted.\n",
				  np->nte_name, np->nte_index);
		    break;
		}
	    }
	} else if (buf[0] == 'i') {
	    dump_init((char *) NULL, F_TERMINFO, S_TERMINFO, 70, 0, FALSE);
	    dump_entry(&cur_term->type, FALSE, TRUE, 0, 0, 0);
	    putchar('\n');
	} else if (buf[0] == 'o') {
	    if (_nc_optimize_enable & OPTIMIZE_MVCUR) {
		_nc_optimize_enable &= ~OPTIMIZE_MVCUR;
		(void) puts("Optimization is now off.");
	    } else {
		_nc_optimize_enable |= OPTIMIZE_MVCUR;
		(void) puts("Optimization is now on.");
	    }
	}
	/*
	 * You can use the `t' test to profile and tune the movement
	 * optimizer.  Use iteration values in three digits or more.
	 * At above 5000 iterations the profile timing averages are stable
	 * to within a millisecond or three.
	 *
	 * The `overhead' field of the report will help you pick a
	 * COMPUTE_OVERHEAD figure appropriate for your processor and
	 * expected line speed.  The `total estimated time' is
	 * computation time plus a character-transmission time
	 * estimate computed from the number of transmits and the baud
	 * rate.
	 *
	 * Use this together with the `o' command to get a read on the
	 * optimizer's effectiveness.  Compare the total estimated times
	 * for `t' runs of the same length in both optimized and un-optimized
	 * modes.  As long as the optimized times are less, the optimizer
	 * is winning.
	 */
	else if (sscanf(buf, "t %d", &n) == 1) {
	    float cumtime = 0.0, perchar;
	    int speeds[] =
	    {2400, 9600, 14400, 19200, 28800, 38400, 0};

	    srand((unsigned) (getpid() + time((time_t *) 0)));
	    profiling = TRUE;
	    xmits = 0;
	    for (i = 0; i < n; i++) {
		/*
		 * This does a move test between two random locations,
		 * Random moves probably short-change the optimizer,
		 * which will work better on the short moves probably
		 * typical of doupdate()'s usage pattern.  Still,
		 * until we have better data...
		 */
#ifdef FIND_COREDUMP
		int from_y = roll(lines);
		int to_y = roll(lines);
		int from_x = roll(columns);
		int to_x = roll(columns);

		printf("(%d,%d) -> (%d,%d)\n", from_y, from_x, to_y, to_x);
		mvcur(from_y, from_x, to_y, to_x);
#else
		mvcur(roll(lines), roll(columns), roll(lines), roll(columns));
#endif /* FIND_COREDUMP */
		if (diff)
		    cumtime += diff;
	    }
	    profiling = FALSE;

	    /*
	     * Average milliseconds per character optimization time.
	     * This is the key figure to watch when tuning the optimizer.
	     */
	    perchar = cumtime / n;

	    (void) printf("%d moves (%ld chars) in %d msec, %f msec each:\n",
			  n, xmits, (int) cumtime, perchar);

	    for (i = 0; speeds[i]; i++) {
		/*
		 * Total estimated time for the moves, computation and
		 * transmission both. Transmission time is an estimate
		 * assuming 9 bits/char, 8 bits + 1 stop bit.
		 */
		float totalest = cumtime + xmits * 9 * 1e6 / speeds[i];

		/*
		 * Per-character optimization overhead in character transmits
		 * at the current speed.  Round this to the nearest integer
		 * to figure COMPUTE_OVERHEAD for the speed.
		 */
		float overhead = speeds[i] * perchar / 1e6;

		(void)
		    printf("%6d bps: %3.2f char-xmits overhead; total estimated time %15.2f\n",
			   speeds[i], overhead, totalest);
	    }
	} else if (buf[0] == 'c') {
	    (void) printf("char padding: %d\n", SP->_char_padding);
	    (void) printf("cr cost: %d\n", SP->_cr_cost);
	    (void) printf("cup cost: %d\n", SP->_cup_cost);
	    (void) printf("home cost: %d\n", SP->_home_cost);
	    (void) printf("ll cost: %d\n", SP->_ll_cost);
#if USE_HARD_TABS
	    (void) printf("ht cost: %d\n", SP->_ht_cost);
	    (void) printf("cbt cost: %d\n", SP->_cbt_cost);
#endif /* USE_HARD_TABS */
	    (void) printf("cub1 cost: %d\n", SP->_cub1_cost);
	    (void) printf("cuf1 cost: %d\n", SP->_cuf1_cost);
	    (void) printf("cud1 cost: %d\n", SP->_cud1_cost);
	    (void) printf("cuu1 cost: %d\n", SP->_cuu1_cost);
	    (void) printf("cub cost: %d\n", SP->_cub_cost);
	    (void) printf("cuf cost: %d\n", SP->_cuf_cost);
	    (void) printf("cud cost: %d\n", SP->_cud_cost);
	    (void) printf("cuu cost: %d\n", SP->_cuu_cost);
	    (void) printf("hpa cost: %d\n", SP->_hpa_cost);
	    (void) printf("vpa cost: %d\n", SP->_vpa_cost);
	} else if (buf[0] == 'x' || buf[0] == 'q')
	    break;
	else
	    (void) puts("Invalid command.");
    }

    (void) fputs("rmcup:", stdout);
    _nc_mvcur_wrap();
    putchar('\n');

    return (0);
}

#endif /* MAIN */

/* lib_mvcur.c ends here */