89 lines
1.3 KiB
C
89 lines
1.3 KiB
C
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/* $Id: catpoint.c,v 1.2 2013/03/28 12:00:48 lostd Exp $ */
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <err.h>
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#include <curses.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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int
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main(int argc, char *argv[])
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{
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int c, i, fd;
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char **p; /* the slides */
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if (argc == 1)
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errx(1, "usage: %s file ...", argv[0]);
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argv++;
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argc--;
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p = calloc(argc, sizeof(char *));
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/* map files to mem */
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for (i = 0; argv[i] != NULL; i++) {
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fd = open(argv[i], O_RDONLY, 0);
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if (fd == -1)
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err(1, "open: %s", argv[i]);
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p[i] = mmap(NULL, 0x1000, PROT_READ, MAP_PRIVATE, fd, 0);
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if (p[i] == MAP_FAILED)
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err(1, "mmap");
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close(fd);
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}
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/* init curses */
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initscr();
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cbreak();
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noecho();
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nonl();
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intrflush(stdscr, FALSE);
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keypad(stdscr, TRUE);
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curs_set(FALSE); /* hide cursor */
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/* start */
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i = 0;
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show:
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/* display slide */
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clear();
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printw(p[i]);
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again:
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c = getch();
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switch (c) {
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case 'q':
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break;
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/* next */
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case 'l':
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case 'j':
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case KEY_RIGHT:
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case KEY_DOWN:
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if (i < argc - 1) {
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i++;
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goto show;
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}
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goto again;
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/* prev */
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case 'h':
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case 'k':
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case KEY_LEFT:
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case KEY_UP:
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if (i > 0) {
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i--;
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goto show;
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}
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goto again;
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default:
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goto again;
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}
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/* unmap mem */
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for (i = 0; argv[i] != NULL; i++)
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munmap(p[i], 0x1000);
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endwin(); /* restore terminal */
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return (0);
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}
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