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-rw-r--r--usr.bin/more/screen.c587
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diff --git a/usr.bin/more/screen.c b/usr.bin/more/screen.c
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--- a/usr.bin/more/screen.c
+++ /dev/null
@@ -1,587 +0,0 @@
-/*
- * Copyright (c) 1988 Mark Nudleman
- * Copyright (c) 1988, 1993
- * The Regents of the University of California. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- * 2. Redistributions in binary form must reproduce the above copyright
- * notice, this list of conditions and the following disclaimer in the
- * documentation and/or other materials provided with the distribution.
- * 3. All advertising materials mentioning features or use of this software
- * must display the following acknowledgement:
- * This product includes software developed by the University of
- * California, Berkeley and its contributors.
- * 4. Neither the name of the University nor the names of its contributors
- * may be used to endorse or promote products derived from this software
- * without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
- * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
- * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
- * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
- * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
- * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
- * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
- * SUCH DAMAGE.
- */
-
-#ifndef lint
-static char sccsid[] = "@(#)screen.c 8.2 (Berkeley) 4/20/94";
-#endif /* not lint */
-
-/*
- * Routines which deal with the characteristics of the terminal.
- * Uses termcap to be as terminal-independent as possible.
- *
- * {{ Someday this should be rewritten to use curses. }}
- */
-
-#include <stdio.h>
-#include <less.h>
-
-#define TERMIOS 1
-
-#if TERMIO
-#include <termio.h>
-#else
-#if TERMIOS
-#include <termios.h>
-#define TAB3 0
-#include <sys/ioctl.h>
-#else
-#include <sgtty.h>
-#endif
-#endif
-
-#ifdef TIOCGWINSZ
-#include <sys/ioctl.h>
-#else
-/*
- * For the Unix PC (ATT 7300 & 3B1):
- * Since WIOCGETD is defined in sys/window.h, we can't use that to decide
- * whether to include sys/window.h. Use SIGPHONE from sys/signal.h instead.
- */
-#include <sys/signal.h>
-#ifdef SIGPHONE
-#include <sys/window.h>
-#endif
-#endif
-
-/*
- * Strings passed to tputs() to do various terminal functions.
- */
-static char
- *sc_pad, /* Pad string */
- *sc_home, /* Cursor home */
- *sc_addline, /* Add line, scroll down following lines */
- *sc_lower_left, /* Cursor to last line, first column */
- *sc_move, /* General cursor positioning */
- *sc_clear, /* Clear screen */
- *sc_eol_clear, /* Clear to end of line */
- *sc_s_in, /* Enter standout (highlighted) mode */
- *sc_s_out, /* Exit standout mode */
- *sc_u_in, /* Enter underline mode */
- *sc_u_out, /* Exit underline mode */
- *sc_b_in, /* Enter bold mode */
- *sc_b_out, /* Exit bold mode */
- *sc_backspace, /* Backspace cursor */
- *sc_init, /* Startup terminal initialization */
- *sc_deinit; /* Exit terminal de-intialization */
-
-int auto_wrap; /* Terminal does \r\n when write past margin */
-int ignaw; /* Terminal ignores \n immediately after wrap */
- /* The user's erase and line-kill chars */
-int retain_below; /* Terminal retains text below the screen */
-int erase_char, kill_char, werase_char;
-int sc_width, sc_height = -1; /* Height & width of screen */
-int sc_window = -1; /* window size for forward and backward */
-int bo_width, be_width; /* Printing width of boldface sequences */
-int ul_width, ue_width; /* Printing width of underline sequences */
-int so_width, se_width; /* Printing width of standout sequences */
-
-/*
- * These two variables are sometimes defined in,
- * and needed by, the termcap library.
- * It may be necessary on some systems to declare them extern here.
- */
-/*extern*/ short ospeed; /* Terminal output baud rate */
-/*extern*/ char PC; /* Pad character */
-
-extern int back_scroll;
-char *tgetstr();
-char *tgoto();
-
-/*
- * Change terminal to "raw mode", or restore to "normal" mode.
- * "Raw mode" means
- * 1. An outstanding read will complete on receipt of a single keystroke.
- * 2. Input is not echoed.
- * 3. On output, \n is mapped to \r\n.
- * 4. \t is NOT expanded into spaces.
- * 5. Signal-causing characters such as ctrl-C (interrupt),
- * etc. are NOT disabled.
- * It doesn't matter whether an input \n is mapped to \r, or vice versa.
- */
-raw_mode(on)
- int on;
-{
-#if TERMIO || TERMIOS
-
-#if TERMIO
- struct termio s;
- static struct termio save_term;
-#else
- struct termios s;
- static struct termios save_term;
-#endif
-
- if (on)
- {
- /*
- * Get terminal modes.
- */
-#if TERMIO
- (void)ioctl(2, TCGETA, &s);
-#else
- tcgetattr(2, &s);
-#endif
-
- /*
- * Save modes and set certain variables dependent on modes.
- */
- save_term = s;
-#if TERMIO
- ospeed = s.c_cflag & CBAUD;
-#else
- ospeed = cfgetospeed(&s);
-#endif
- erase_char = s.c_cc[VERASE];
- kill_char = s.c_cc[VKILL];
- werase_char = s.c_cc[VWERASE];
-
- /*
- * Set the modes to the way we want them.
- */
- s.c_lflag &= ~(ICANON|ECHO|ECHOE|ECHOK|ECHONL);
- s.c_oflag |= (OPOST|ONLCR|TAB3);
-#if TERMIO
- s.c_oflag &= ~(OCRNL|ONOCR|ONLRET);
-#endif
- s.c_cc[VMIN] = 1;
- s.c_cc[VTIME] = 0;
- } else
- {
- /*
- * Restore saved modes.
- */
- s = save_term;
- }
-#if TERMIO
- (void)ioctl(2, TCSETAW, &s);
-#else
- tcsetattr(2, TCSADRAIN, &s);
-#endif
-#else
- struct sgttyb s;
- struct ltchars l;
- static struct sgttyb save_term;
-
- if (on)
- {
- /*
- * Get terminal modes.
- */
- (void)ioctl(2, TIOCGETP, &s);
- (void)ioctl(2, TIOCGLTC, &l);
-
- /*
- * Save modes and set certain variables dependent on modes.
- */
- save_term = s;
- ospeed = s.sg_ospeed;
- erase_char = s.sg_erase;
- kill_char = s.sg_kill;
- werase_char = l.t_werasc;
-
- /*
- * Set the modes to the way we want them.
- */
- s.sg_flags |= CBREAK;
- s.sg_flags &= ~(ECHO|XTABS);
- } else
- {
- /*
- * Restore saved modes.
- */
- s = save_term;
- }
- (void)ioctl(2, TIOCSETN, &s);
-#endif
-}
-
-/*
- * Get terminal capabilities via termcap.
- */
-get_term()
-{
- char termbuf[2048];
- char *sp;
- char *term;
- int hard;
-#ifdef TIOCGWINSZ
- struct winsize w;
-#else
-#ifdef WIOCGETD
- struct uwdata w;
-#endif
-#endif
- static char sbuf[1024];
-
- char *getenv(), *strcpy();
-
- /*
- * Find out what kind of terminal this is.
- */
- if ((term = getenv("TERM")) == NULL)
- term = "unknown";
- if (tgetent(termbuf, term) <= 0)
- (void)strcpy(termbuf, "dumb:co#80:hc:");
-
- /*
- * Get size of the screen.
- */
-#ifdef TIOCGWINSZ
- if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_row > 0)
- sc_height = w.ws_row;
-#else
-#ifdef WIOCGETD
- if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_height > 0)
- sc_height = w.uw_height/w.uw_vs;
-#endif
-#endif
- else
- sc_height = tgetnum("li");
- hard = (sc_height < 0 || tgetflag("hc"));
- if (hard) {
- /* Oh no, this is a hardcopy terminal. */
- sc_height = 24;
- }
-
-#ifdef TIOCGWINSZ
- if (ioctl(2, TIOCGWINSZ, &w) == 0 && w.ws_col > 0)
- sc_width = w.ws_col;
- else
-#ifdef WIOCGETD
- if (ioctl(2, WIOCGETD, &w) == 0 && w.uw_width > 0)
- sc_width = w.uw_width/w.uw_hs;
- else
-#endif
-#endif
- sc_width = tgetnum("co");
- if (sc_width < 0)
- sc_width = 80;
-
- auto_wrap = tgetflag("am");
- ignaw = tgetflag("xn");
- retain_below = tgetflag("db");
-
- /*
- * Assumes termcap variable "sg" is the printing width of
- * the standout sequence, the end standout sequence,
- * the underline sequence, the end underline sequence,
- * the boldface sequence, and the end boldface sequence.
- */
- if ((so_width = tgetnum("sg")) < 0)
- so_width = 0;
- be_width = bo_width = ue_width = ul_width = se_width = so_width;
-
- /*
- * Get various string-valued capabilities.
- */
- sp = sbuf;
-
- sc_pad = tgetstr("pc", &sp);
- if (sc_pad != NULL)
- PC = *sc_pad;
-
- sc_init = tgetstr("ti", &sp);
- if (sc_init == NULL)
- sc_init = "";
-
- sc_deinit= tgetstr("te", &sp);
- if (sc_deinit == NULL)
- sc_deinit = "";
-
- sc_eol_clear = tgetstr("ce", &sp);
- if (hard || sc_eol_clear == NULL || *sc_eol_clear == '\0')
- {
- sc_eol_clear = "";
- }
-
- sc_clear = tgetstr("cl", &sp);
- if (hard || sc_clear == NULL || *sc_clear == '\0')
- {
- sc_clear = "\n\n";
- }
-
- sc_move = tgetstr("cm", &sp);
- if (hard || sc_move == NULL || *sc_move == '\0')
- {
- /*
- * This is not an error here, because we don't
- * always need sc_move.
- * We need it only if we don't have home or lower-left.
- */
- sc_move = "";
- }
-
- sc_s_in = tgetstr("so", &sp);
- if (hard || sc_s_in == NULL)
- sc_s_in = "";
-
- sc_s_out = tgetstr("se", &sp);
- if (hard || sc_s_out == NULL)
- sc_s_out = "";
-
- sc_u_in = tgetstr("us", &sp);
- if (hard || sc_u_in == NULL)
- sc_u_in = sc_s_in;
-
- sc_u_out = tgetstr("ue", &sp);
- if (hard || sc_u_out == NULL)
- sc_u_out = sc_s_out;
-
- sc_b_in = tgetstr("md", &sp);
- if (hard || sc_b_in == NULL)
- {
- sc_b_in = sc_s_in;
- sc_b_out = sc_s_out;
- } else
- {
- sc_b_out = tgetstr("me", &sp);
- if (hard || sc_b_out == NULL)
- sc_b_out = "";
- }
-
- sc_home = tgetstr("ho", &sp);
- if (hard || sc_home == NULL || *sc_home == '\0')
- {
- if (*sc_move == '\0')
- {
- /*
- * This last resort for sc_home is supposed to
- * be an up-arrow suggesting moving to the
- * top of the "virtual screen". (The one in
- * your imagination as you try to use this on
- * a hard copy terminal.)
- */
- sc_home = "|\b^";
- } else
- {
- /*
- * No "home" string,
- * but we can use "move(0,0)".
- */
- (void)strcpy(sp, tgoto(sc_move, 0, 0));
- sc_home = sp;
- sp += strlen(sp) + 1;
- }
- }
-
- sc_lower_left = tgetstr("ll", &sp);
- if (hard || sc_lower_left == NULL || *sc_lower_left == '\0')
- {
- if (*sc_move == '\0')
- {
- sc_lower_left = "\r";
- } else
- {
- /*
- * No "lower-left" string,
- * but we can use "move(0,last-line)".
- */
- (void)strcpy(sp, tgoto(sc_move, 0, sc_height-1));
- sc_lower_left = sp;
- sp += strlen(sp) + 1;
- }
- }
-
- /*
- * To add a line at top of screen and scroll the display down,
- * we use "al" (add line) or "sr" (scroll reverse).
- */
- if ((sc_addline = tgetstr("al", &sp)) == NULL ||
- *sc_addline == '\0')
- sc_addline = tgetstr("sr", &sp);
-
- if (hard || sc_addline == NULL || *sc_addline == '\0')
- {
- sc_addline = "";
- /* Force repaint on any backward movement */
- back_scroll = 0;
- }
-
- if (tgetflag("bs"))
- sc_backspace = "\b";
- else
- {
- sc_backspace = tgetstr("bc", &sp);
- if (sc_backspace == NULL || *sc_backspace == '\0')
- sc_backspace = "\b";
- }
-}
-
-
-/*
- * Below are the functions which perform all the
- * terminal-specific screen manipulation.
- */
-
-int putchr();
-
-/*
- * Initialize terminal
- */
-init()
-{
- tputs(sc_init, sc_height, putchr);
-}
-
-/*
- * Deinitialize terminal
- */
-deinit()
-{
- tputs(sc_deinit, sc_height, putchr);
-}
-
-/*
- * Home cursor (move to upper left corner of screen).
- */
-home()
-{
- tputs(sc_home, 1, putchr);
-}
-
-/*
- * Add a blank line (called with cursor at home).
- * Should scroll the display down.
- */
-add_line()
-{
- tputs(sc_addline, sc_height, putchr);
-}
-
-int short_file; /* if file less than a screen */
-lower_left()
-{
- if (short_file) {
- putchr('\r');
- flush();
- }
- else
- tputs(sc_lower_left, 1, putchr);
-}
-
-/*
- * Ring the terminal bell.
- */
-bell()
-{
- putchr('\7');
-}
-
-/*
- * Clear the screen.
- */
-clear()
-{
- tputs(sc_clear, sc_height, putchr);
-}
-
-/*
- * Clear from the cursor to the end of the cursor's line.
- * {{ This must not move the cursor. }}
- */
-clear_eol()
-{
- tputs(sc_eol_clear, 1, putchr);
-}
-
-/*
- * Begin "standout" (bold, underline, or whatever).
- */
-so_enter()
-{
- tputs(sc_s_in, 1, putchr);
-}
-
-/*
- * End "standout".
- */
-so_exit()
-{
- tputs(sc_s_out, 1, putchr);
-}
-
-/*
- * Begin "underline" (hopefully real underlining,
- * otherwise whatever the terminal provides).
- */
-ul_enter()
-{
- tputs(sc_u_in, 1, putchr);
-}
-
-/*
- * End "underline".
- */
-ul_exit()
-{
- tputs(sc_u_out, 1, putchr);
-}
-
-/*
- * Begin "bold"
- */
-bo_enter()
-{
- tputs(sc_b_in, 1, putchr);
-}
-
-/*
- * End "bold".
- */
-bo_exit()
-{
- tputs(sc_b_out, 1, putchr);
-}
-
-/*
- * Erase the character to the left of the cursor
- * and move the cursor left.
- */
-backspace()
-{
- /*
- * Try to erase the previous character by overstriking with a space.
- */
- tputs(sc_backspace, 1, putchr);
- putchr(' ');
- tputs(sc_backspace, 1, putchr);
-}
-
-/*
- * Output a plain backspace, without erasing the previous char.
- */
-putbs()
-{
- tputs(sc_backspace, 1, putchr);
-}
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