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30 * Author: Thomas E. Dickey
32 * $Id: demo_tabs.c,v 1.10 2022/12/04 00:40:11 tom Exp $
34 * A simple demo of tabs in curses.
38 #include <test.priv.h>
43 static const char *msg[] =
45 "Usage: demo_tabs [options]"
47 ,"Print a grid to test tab-stops with the curses interface"
51 ," -l COUNT total number of lines to show"
52 ," -t NUM set TABSIZE variable to the given value"
55 for (n = 0; n < SIZEOF(msg); ++n) {
56 fprintf(stderr, "%s\n", msg[n]);
58 ExitProgram(ok ? EXIT_SUCCESS : EXIT_FAILURE);
65 main(int argc, char *argv[])
68 int ch, col, row, step;
70 int curses_stops = -1;
72 while ((ch = getopt(argc, argv, OPTS_COMMON "l:t:")) != -1) {
75 line_limit = atoi(optarg);
78 curses_stops = atoi(optarg);
82 ExitProgram(EXIT_SUCCESS);
84 usage(ch == OPTS_USAGE);
93 set_tabsize(curses_stops);
95 tabstop = tigetnum("it");
99 for (row = 0; row < LINES; ++row) {
101 for (col = step = 0; col < COLS - 1; ++col) {
104 if ((col % tabstop) == 0)
107 } else if (col + 1 < row) {
111 col = (row + (tabstop * ++step));
115 if ((col + tabstop) < COLS)
121 if (line_limit > 0 && row >= line_limit)
126 ExitProgram(EXIT_SUCCESS);