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30 * Author: Thomas E. Dickey
32 * $Id: demo_tabs.c,v 1.5 2020/02/02 23:34:34 tom Exp $
34 * A simple demo of tabs in curses.
37 #include "test.priv.h"
42 static const char *msg[] =
44 "Usage: demo_tabs [options]",
46 "Print a grid to test tab-stops with the curses interface",
49 " -l COUNT total number of lines to show",
50 " -t NUM set TABSIZE variable to the given value",
53 for (n = 0; n < SIZEOF(msg); ++n) {
54 fprintf(stderr, "%s\n", msg[n]);
56 ExitProgram(EXIT_FAILURE);
60 main(int argc, char *argv[])
63 int n, col, row, step;
65 int curses_stops = -1;
67 while ((n = getopt(argc, argv, "l:t:")) != -1) {
70 line_limit = atoi(optarg);
73 curses_stops = atoi(optarg);
85 set_tabsize(curses_stops);
87 tabstop = tigetnum("it");
91 for (row = 0; row < LINES; ++row) {
93 for (col = step = 0; col < COLS - 1; ++col) {
96 if ((col % tabstop) == 0)
99 } else if (col + 1 < row) {
103 col = (row + (tabstop * ++step));
107 if ((col + tabstop) < COLS)
113 if (line_limit > 0 && row >= line_limit)
118 ExitProgram(EXIT_SUCCESS);