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30 * Author: Thomas E. Dickey
32 * $Id: demo_tabs.c,v 1.7 2022/08/13 21:02:25 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",
50 " -l COUNT total number of lines to show",
51 " -t NUM set TABSIZE variable to the given value",
54 for (n = 0; n < SIZEOF(msg); ++n) {
55 fprintf(stderr, "%s\n", msg[n]);
57 ExitProgram(EXIT_FAILURE);
61 main(int argc, char *argv[])
64 int n, col, row, step;
66 int curses_stops = -1;
68 while ((n = getopt(argc, argv, "l:t:")) != -1) {
71 line_limit = atoi(optarg);
74 curses_stops = atoi(optarg);
86 set_tabsize(curses_stops);
88 tabstop = tigetnum("it");
92 for (row = 0; row < LINES; ++row) {
94 for (col = step = 0; col < COLS - 1; ++col) {
97 if ((col % tabstop) == 0)
100 } else if (col + 1 < row) {
104 col = (row + (tabstop * ++step));
108 if ((col + tabstop) < COLS)
114 if (line_limit > 0 && row >= line_limit)
119 ExitProgram(EXIT_SUCCESS);