ncurses/test/dots_mvcur.c

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/*
 * Author: Thomas E. Dickey - 2007
 *
 * $Id: dots_mvcur.c,v 1.10 2013/09/28 22:44:18 tom Exp $
 *
 * A simple demo of the terminfo interface, and mvcur.
 */
#define USE_TINFO
#include <test.priv.h>

#if HAVE_SETUPTERM

#include <time.h>

#define valid(s) ((s != 0) && s != (char *)-1)

static bool interrupted = FALSE;
static long total_chars = 0;
static time_t started;

static
TPUTS_PROTO(outc, c)
{
    int rc = c;

    if (interrupted) {
	char tmp = (char) c;
	if (write(STDOUT_FILENO, &tmp, (size_t) 1) == -1)
	    rc = EOF;
    } else {
	if (putc(c, stdout) == EOF)
	    rc = EOF;
    }
    TPUTS_RETURN(rc);
}

static bool
outs(const char *s)
{
    if (valid(s)) {
	tputs(s, 1, outc);
	return TRUE;
    }
    return FALSE;
}

static void
cleanup(void)
{
    outs(exit_attribute_mode);
    if (!outs(orig_colors))
	outs(orig_pair);
    outs(clear_screen);
    outs(cursor_normal);

    printf("\n\n%ld total chars, rate %.2f/sec\n",
	   total_chars,
	   ((double) (total_chars) / (double) (time((time_t *) 0) - started)));
}

static void
onsig(int n GCC_UNUSED)
{
    interrupted = TRUE;
}

static double
ranf(void)
{
    long r = (rand() & 077777);
    return ((double) r / 32768.);
}

int
main(int argc GCC_UNUSED,
     char *argv[]GCC_UNUSED)
{
    int x0 = 1, y0 = 1;
    int x, y, z, p;
    double r;
    double c;
    SCREEN *sp;
    int my_colors;

    CATCHALL(onsig);

    srand((unsigned) time(0));
    sp = newterm((char *) 0, stdout, stdin);
    outs(clear_screen);
    outs(cursor_home);
    outs(cursor_invisible);
    my_colors = max_colors;
    if (my_colors > 1) {
	if (!valid(set_a_foreground)
	    || !valid(set_a_background)
	    || (!valid(orig_colors) && !valid(orig_pair)))
	    my_colors = -1;
    }

    r = (double) (lines - 4);
    c = (double) (columns - 4);
    started = time((time_t *) 0);

    while (!interrupted) {
	x = (int) (c * ranf()) + 2;
	y = (int) (r * ranf()) + 2;
	p = (ranf() > 0.9) ? '*' : ' ';

	if (mvcur(y0, x0, y, x) != ERR) {
	    x0 = x;
	    y0 = y;
	}

	if (my_colors > 0) {
	    z = (int) (ranf() * my_colors);
	    if (ranf() > 0.01) {
		tputs(tparm2(set_a_foreground, z), 1, outc);
	    } else {
		tputs(tparm2(set_a_background, z), 1, outc);
		napms(1);
	    }
	} else if (valid(exit_attribute_mode)
		   && valid(enter_reverse_mode)) {
	    if (ranf() <= 0.01) {
		outs((ranf() > 0.6)
		     ? enter_reverse_mode
		     : exit_attribute_mode);
		napms(1);
	    }
	}
	outc(p);
	++x0;
	fflush(stdout);
	++total_chars;
    }
    cleanup();
    endwin();
    delscreen(sp);
    ExitProgram(EXIT_SUCCESS);
}
#else
int
main(int argc GCC_UNUSED,
     char *argv[]GCC_UNUSED)
{
    fprintf(stderr, "This program requires terminfo\n");
    exit(EXIT_FAILURE);
}
#endif