Source Code 1992 March/Source_Code_CD-ROM_Walnut_Creek_March_1992.iso/usenet/altsrcs/3/3878

Internet Message Format | 1991-08-22 | 51.3 KB

Path: wupost!decwrl!amdcad!pyramid!oliveb!olivea!samsung!crackers!m2c!wpi.WPI.EDU!rcarter
From: [e-mail] (Randolph Carter (nee. Joseph H. Allen))
Newsgroups: alt.sources
Subject: J (Joe's Editor) - Part 1 of 3
Message-ID: <[e-mail]>
Date: 22 Aug 91 04:32:41 GMT
Sender: [e-mail] (Randolph Carter (nee. Joseph H. Allen))
Organization: Kadath Tours, Inc.
Lines: 2011


Concatenate the indicated parts of these 3 posts into a file called 'parts'
Make a directory called 'j' and go into it
Type sh ../parts to unpack the archive

-- Cut here; take text between this line and the last 'cut' line
# This is a shell archive.  Remove anything before this line,
# then unpack it by saving it in a file and typing "sh file".
#
# Wrapped by Joseph Allen <jallen@libserv1> on Thu Aug 22 00:17:52 1991
#
# This archive contains:
#    COPYING        Makefile    NEWS        README
#    async.h        asyncbsd.c    asynchpux.c    asyncxenix.c
#    blocks.c    blocks.h    cruddy.c    j.1
#    j.c        j.h        keymapbsd    keymapxenix
#

LANG=""; export LANG
PATH=/bin:/usr/bin:$PATH; export PATH

echo x - COPYING
cat >COPYING <<'@EOF'

            GNU GENERAL PUBLIC LICENSE
             Version 1, February 1989

 Copyright (C) 1989 Free Software Foundation, Inc.
                    675 Mass Ave, Cambridge, MA 02139, USA
 Everyone is permitted to copy and distribute verbatim copies
 of this license document, but changing it is not allowed.

                Preamble

  The license agreements of most software companies try to keep users
at the mercy of those companies.  By contrast, our General Public
License is intended to guarantee your freedom to share and change free
software--to make sure the software is free for all its users.  The
General Public License applies to the Free Software Foundation's
software and to any other program whose authors commit to using it.
You can use it for your programs, too.

  When we speak of free software, we are referring to freedom, not
price.  Specifically, the General Public License is designed to make
sure that you have the freedom to give away or sell copies of free
software, that you receive source code or can get it if you want it,
that you can change the software or use pieces of it in new free
programs; and that you know you can do these things.

  To protect your rights, we need to make restrictions that forbid
anyone to deny you these rights or to ask you to surrender the rights.
These restrictions translate to certain responsibilities for you if you
distribute copies of the software, or if you modify it.

  For example, if you distribute copies of a such a program, whether
gratis or for a fee, you must give the recipients all the rights that
you have.  You must make sure that they, too, receive or can get the
source code.  And you must tell them their rights.

  We protect your rights with two steps: (1) copyright the software, and
(2) offer you this license which gives you legal permission to copy,
distribute and/or modify the software.

  Also, for each author's protection and ours, we want to make certain
that everyone understands that there is no warranty for this free
software.  If the software is modified by someone else and passed on, we
want its recipients to know that what they have is not the original, so
that any problems introduced by others will not reflect on the original
authors' reputations.

  The precise terms and conditions for copying, distribution and
modification follow.

            GNU GENERAL PUBLIC LICENSE
   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION

  0. This License Agreement applies to any program or other work which
contains a notice placed by the copyright holder saying it may be
distributed under the terms of this General Public License.  The
"Program", below, refers to any such program or work, and a "work based
on the Program" means either the Program or any work containing the
Program or a portion of it, either verbatim or with modifications.  Each
licensee is addressed as "you".

  1. You may copy and distribute verbatim copies of the Program's source
code as you receive it, in any medium, provided that you conspicuously and
appropriately publish on each copy an appropriate copyright notice and
disclaimer of warranty; keep intact all the notices that refer to this
General Public License and to the absence of any warranty; and give any
other recipients of the Program a copy of this General Public License
along with the Program.  You may charge a fee for the physical act of
transferring a copy.

  2. You may modify your copy or copies of the Program or any portion of
it, and copy and distribute such modifications under the terms of Paragraph
1 above, provided that you also do the following:

    a) cause the modified files to carry prominent notices stating that
    you changed the files and the date of any change; and

    b) cause the whole of any work that you distribute or publish, that
    in whole or in part contains the Program or any part thereof, either
    with or without modifications, to be licensed at no charge to all
    third parties under the terms of this General Public License (except
    that you may choose to grant warranty protection to some or all
    third parties, at your option).

    c) If the modified program normally reads commands interactively when
    run, you must cause it, when started running for such interactive use
    in the simplest and most usual way, to print or display an
    announcement including an appropriate copyright notice and a notice
    that there is no warranty (or else, saying that you provide a
    warranty) and that users may redistribute the program under these
    conditions, and telling the user how to view a copy of this General
    Public License.

    d) You may charge a fee for the physical act of transferring a
    copy, and you may at your option offer warranty protection in
    exchange for a fee.

Mere aggregation of another independent work with the Program (or its
derivative) on a volume of a storage or distribution medium does not bring
the other work under the scope of these terms.

  3. You may copy and distribute the Program (or a portion or derivative of
it, under Paragraph 2) in object code or executable form under the terms of
Paragraphs 1 and 2 above provided that you also do one of the following:

    a) accompany it with the complete corresponding machine-readable
    source code, which must be distributed under the terms of
    Paragraphs 1 and 2 above; or,

    b) accompany it with a written offer, valid for at least three
    years, to give any third party free (except for a nominal charge
    for the cost of distribution) a complete machine-readable copy of the
    corresponding source code, to be distributed under the terms of
    Paragraphs 1 and 2 above; or,

    c) accompany it with the information you received as to where the
    corresponding source code may be obtained.  (This alternative is
    allowed only for noncommercial distribution and only if you
    received the program in object code or executable form alone.)

Source code for a work means the preferred form of the work for making
modifications to it.  For an executable file, complete source code means
all the source code for all modules it contains; but, as a special
exception, it need not include source code for modules which are standard
libraries that accompany the operating system on which the executable
file runs, or for standard header files or definitions files that
accompany that operating system.

  4. You may not copy, modify, sublicense, distribute or transfer the
Program except as expressly provided under this General Public License.
Any attempt otherwise to copy, modify, sublicense, distribute or transfer
the Program is void, and will automatically terminate your rights to use
the Program under this License.  However, parties who have received
copies, or rights to use copies, from you under this General Public
License will not have their licenses terminated so long as such parties
remain in full compliance.

  5. By copying, distributing or modifying the Program (or any work based
on the Program) you indicate your acceptance of this license to do so,
and all its terms and conditions.

  6. Each time you redistribute the Program (or any work based on the
Program), the recipient automatically receives a license from the original
licensor to copy, distribute or modify the Program subject to these
terms and conditions.  You may not impose any further restrictions on the
recipients' exercise of the rights granted herein.

  7. The Free Software Foundation may publish revised and/or new versions
of the General Public License from time to time.  Such new versions will
be similar in spirit to the present version, but may differ in detail to
address new problems or concerns.

Each version is given a distinguishing version number.  If the Program
specifies a version number of the license which applies to it and "any
later version", you have the option of following the terms and conditions
either of that version or of any later version published by the Free
Software Foundation.  If the Program does not specify a version number of
the license, you may choose any version ever published by the Free Software
Foundation.

  8. If you wish to incorporate parts of the Program into other free
programs whose distribution conditions are different, write to the author
to ask for permission.  For software which is copyrighted by the Free
Software Foundation, write to the Free Software Foundation; we sometimes
make exceptions for this.  Our decision will be guided by the two goals
of preserving the free status of all derivatives of our free software and
of promoting the sharing and reuse of software generally.

                NO WARRANTY

  9. BECAUSE THE PROGRAM IS LICENSED FREE OF CHARGE, THERE IS NO WARRANTY
FOR THE PROGRAM, TO THE EXTENT PERMITTED BY APPLICABLE LAW.  EXCEPT WHEN
OTHERWISE STATED IN WRITING THE COPYRIGHT HOLDERS AND/OR OTHER PARTIES
PROVIDE THE PROGRAM "AS IS" WITHOUT WARRANTY OF ANY KIND, EITHER EXPRESSED
OR IMPLIED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.  THE ENTIRE RISK AS
TO THE QUALITY AND PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE
PROGRAM PROVE DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING,
REPAIR OR CORRECTION.

  10. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MAY MODIFY AND/OR
REDISTRIBUTE THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING
OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT NOT LIMITED
TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR LOSSES SUSTAINED BY
YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM TO OPERATE WITH ANY OTHER
PROGRAMS), EVEN IF SUCH HOLDER OR OTHER PARTY HAS BEEN ADVISED OF THE
POSSIBILITY OF SUCH DAMAGES.

             END OF TERMS AND CONDITIONS

    Appendix: How to Apply These Terms to Your New Programs

  If you develop a new program, and you want it to be of the greatest
possible use to humanity, the best way to achieve this is to make it
free software which everyone can redistribute and change under these
terms.

  To do so, attach the following notices to the program.  It is safest to
attach them to the start of each source file to most effectively convey
the exclusion of warranty; and each file should have at least the
"copyright" line and a pointer to where the full notice is found.

    <one line to give the program's name and a brief idea of what it does.>
    Copyright (C) 19yy  <name of author>

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 1, or (at your option)
    any later version.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

Also add information on how to contact you by electronic and paper mail.

If the program is interactive, make it output a short notice like this
when it starts in an interactive mode:

    Gnomovision version 69, Copyright (C) 19xx name of author
    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
    This is free software, and you are welcome to redistribute it
    under certain conditions; type `show c' for details.

The hypothetical commands `show w' and `show c' should show the
appropriate parts of the General Public License.  Of course, the
commands you use may be called something other than `show w' and `show
c'; they could even be mouse-clicks or menu items--whatever suits your
program.

You should also get your employer (if you work as a programmer) or your
school, if any, to sign a "copyright disclaimer" for the program, if
necessary.  Here a sample; alter the names:

  Yoyodyne, Inc., hereby disclaims all copyright interest in the
  program `Gnomovision' (a program to direct compilers to make passes
  at assemblers) written by James Hacker.

  <signature of Ty Coon>, 1 April 1989
  Ty Coon, President of Vice

That's all there is to it!
@EOF

chmod 600 COPYING

echo x - Makefile
cat >Makefile <<'@EOF'
# Makefile for Joe's Editor

# Directory to install j into
WHERE = /usr/bin

# Use these two for 'cc'
CC = cc
CFLAGS = -DKEYDEF=\"$(WHERE)/keymap.j\" -O

# Use these two for 'gcc'
#CC = gcc
#CFLAGS = -DKEYDEF=\"$(WHERE)/keymap.j\" -traditional -O

foo:
    @echo Type make followed by one of the following
    @echo
    @echo bsd hpux xenix cruddy install clean

bsd: j.o asyncbsd.o blocks.o
    $(CC) $(CFLAGS) j.o asyncbsd.o blocks.o -ltermcap -o j
    cp keymapbsd keymap.j

xenix: j.o asyncxenix.o blocks.o
    $(CC) $(CFLAGS) j.o asyncxenix.o blocks.o -lx -ltermcap -o j
    cp keymapxenix keymap.j

hpux: j.o asynchpux.o blocks.o
    $(CC) $(CFLAGS) j.o asynchpux.o blocks.o -ltermcap -o j
    cp keymapbsd keymap.j

cruddy: j.o cruddy.o blocks.o
    $(CC) $(CFLAGS) j.o cruddy.o blocks.o -o j
    cp keymapbsd keymap.j

install:
    strip j
    mv j $(WHERE)
    mv keymap.j $(WHERE)
    chmod a+x $(WHERE)/j
    chmod a+r $(WHERE)/keymap.j

clean:
    rm asyncbsd.o asyncxenix.o asynchpux.o cruddy.o blocks.o j.o keymap.j

asyncbsd.o cruddy.o asyncxenix.o asynxhpux.o : async.h

blocks.o : blocks.h

j.o : blocks.h j.h async.h
@EOF

chmod 600 Makefile

echo x - NEWS
cat >NEWS <<'@EOF'

Release 0.0.0 of 'J' (Joe's Editor):  This release supersedes all previous
versions which lack a release number.  Note that this program was previously
called 'E' but the name has been changed ('E' turns out to be one of the
synonyms for 'vi').  See below for list of bug fixes and new features.  The
2 following posts contain the source.

Introduction

    'J' is a small screen editor which was designed to be easy to use for
novice users but also to be powerful and complete enough for experienced
users.  Several elements of its design are unique innovations.  Here is a
copy of the on-line help text to give you a feel for this editor:

GO TO              DELETE    MISC      BLOCK    FIND     QUOTE    WINDOW
^B left  ^F right ^D single ^T  mode   ^KB mark ^KF text `  Ctrl  ^KO split
^Z word  ^X word  ^W >word  ^R  retype ^KK end  ^L  next ^\ bit-7 ^KI 1 / all
^A edge  ^E edge  ^O word<  ^KA center ^KC copy ^KL line FILE     ^KP up
^P up    ^N down  ^J >line  ^KJ format ^KM move EXIT     ^KD save ^KN down
^U page  ^V page  ^Y line   ^KZ shell  ^KW save ^KX save ^KR read ^KG grow
^KU top ^KV end   ^K- undo  ^K, indnt< ^KY kill ^C abort/         ^KT shrink
^G matching ([<{` ^K+ redo  ^K. indnt>             close window  ^KE get file

Other relevent features:

    * Extremely small - the XENIX version is only 58K

    * Help text can be left on while editing

    * Key layout designed to eliminate headaches: ^Q and ^S are not used,
      both ^H and DEL are backspace.  Also, each user may customize
      his key layout by modifying a simple initialization file

    * Versions for BSD, HPUX and XENIX 386 are included.  A simple tty
      driver is also provided to ease porting to other systems

    * Currently only VT100/ANSI terminals are supported.  If the terminal
      has scrolling regions, J uses them.  Has well-tuned interruptable
      screen update algorithm

    * Has: autoindent, word-wrap, overtype/insert, picture mode (right-
      arrow makes space past ends of lines), right margin (for paragraph
      formatting and center), and magic tabs (the column number of text
      after tab stops is preserved when inserting and deleting)

    * The cursor column doesn't 'jump' when you move between long and
      short lines.  Instead the cursor column only jumps when you try to
      edit in an invalid place or if picture mode is set, the invalid
      place is made real by space filling

    * Editor modes can be set depending on file extension

    * No line length restrictions.  Binary files can be edited without
      difficulty

    * Long lines are truncated, not wrapped (I.E., the screen scrolls to
      the right to get to the truncated parts)

FIXES FOR THIS VERSION

    * Shell escape lock-ups are fixed

    * Paragraph reformat glitch is fixed

    * Cursor update screwynesses fixed for picture mode

    * Goto next word/Goto previous word/Delete word left and Delete word
      right were made more consistant

NEW FEATURES FOR THIS VERSION

    * ~ can be used at file name prompts to expand user home directories

    * J now has undelete and redelete (you can go backwards and forewards
      through the delete buffer to select which text you want to undelete)

    * J now has indent functions.  A marked block can be indented more
      or less. If you use an indent function outside a marked block, the
      lines with the same or greater indent level surrounding the cursor
      are marked

    * Right margin was added for paragraph format and center line

    * Goto matching parenthasis (or [ { ` < )

    * ` was made the quote control character key because ^_ is not easy
      generate on many keyboard.  `` gets `

    * tty drivers were rewritten.  This made the screen update faster
      (now the screen update is instantaneous on 20MHz 386s).  Screen
      update preempting also works better

THE PLAN

    Version 1.0.0 will be a complete rewrite.  It should be done sometime
before january.  These are my goals for it:

    * Block oriented software virtual memory support (for less thrashing
      and elimination of file size limits caused by the system's process
      size limit)

    * MS-DOS support

    * X windows support

    * Better integration with UNIX:  J will be able to process text
      through pipes (like vi), will have standard unix regular expressions,
      and will be usable as a 'more' program.

    * Will be terminal independant and use termcap and terminfo

    * Will have a ASCII/HEX dump display mode

    * Will have complete program developement support (save&make, next
      error/previous error, tags file support)

    * Will have a much more powerful scrolling algorithm.  I have a
      methode which is simpler and faster than even GNU-EMACS' Gosling
      algorithm

    * All of this will require no changes to the basic keyboard layout-
      maybe one more added line of help text for new things

    * It will probably have keyboard macros but it won't have much of
      an extension language.  Maybe in version 2.0.0

    * I expect all of this not to add more than 30 or 40% to the size

        Joseph H. Allen
        28 Dale Lane
        Smithtown, N.Y. 11787

/*  [e-mail] */      /* Amazing */             /* Joseph H. Allen */
int a[1817];main(z,p,q,r){for(p=80;q+p-80;p-=2*a[p])for(z=9;z--;)q=3&(r=time(0)
+r*57)/7,q=q?q-1?q-2?1-p%79?-1:0:p%79-77?1:0:p<1659?79:0:p>158?-79:0,q?!a[p+q*2
]?a[p+=a[p+=q]=q]=q:0:0;for(;q++-1817;)printf(q%79?"%c":"%c\n"," #"[!a[q-1]]);}
@EOF

chmod 600 NEWS

echo x - README
cat >README <<'@EOF'
If you don't know what this is, read the NEWS file.

To compile:

    (1) Determine where you want to install the editor program and the
        system default keymap file.  Put this path in the Makefile.  If
        you're a mere user, don't worry about this.  Instead, place a copy
        of the 'keymap.j' file (created after you make) in your home
        directory.

    (2) type 'make xenix' for xenix systems, 'make hpux' for hpux systems
        or 'make bsd' for BSD systems.  If none of these work, type
        'make cruddy' to make a version with an inferior terminal driver.

    (3) To install it in the system, log in as superuser and do
        'make install'
@EOF

chmod 600 README

echo x - async.h
cat >async.h <<'@EOF'
/* Terminal interface header file
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

aopen();                /* Set terminal to raw (character at a time) mode */
aclose();               /* Restore terminal to cooked (line at a time) mode */
aflush();               /* Flush the output */
anext();                /* Get next key */

extern int have;    /* Set if there is typeahead */

/* All of the above functions do a fflush(stdout) before doing anything else */

eputs();        /* Write string to terminal */
eputc();        /* Write character to terminal */

shell();        /* Shell escape */
tsignal();              /* E's signal handler.  This function saves the current
                           edit file in .cut.e and then exists some signals
                           might be set up to call this */

termtype();             /* Determine the following terminal parameters */

extern int width;       /* Screen width */
extern int height;      /* Screen height */
extern int scroll;      /* Set=use scrolling regions, Clr=don't use them */

/* If termtype does nothing, these value defualt to: width=80, height=24,
   scroll=1 (true).

   Note that the only terminal type supported is ANSI/VT100
 */


/* For Best operation:
 *
 *    acheck  returns true if the user typed ahead
 *
 *    acheck  should sleep (nap) for number*(10000/baud) milliseconds
 *            immediately after its fflush(stdout) call.  Number is
 *            the number of characters the call to fflush(stdout)
 *            wrote.
 *
 *    aopen & aclose should not loose any typeahead when they change modes
 *
 * For example:  see the async*.c files
 */

/* For O.K. operation:
 *
 *    acheck  always returns 0 (false).  If acheck is going to do this, don't
 *            even have it fflush(stdout).
 *
 *    aopen & aclose do system("/bin/stty ...."); so they invariably loose
 *                   any typeahead
 *
 * For example: see the cruddy.c file
 */
@EOF

chmod 600 async.h

echo x - asyncbsd.c
cat >asyncbsd.c <<'@EOF'
/* Terminal interface for BSD
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <sgtty.h>
#include <fcntl.h>
#include <stdio.h>
#include <signal.h>
#include <sys/time.h>
#include "async.h"

#define HZ 10            /* Clock ticks/second */

#define DIVISOR 11000000    /* The baud rate divided into this should
                   give the number of microseconds per
                   character.  It should attempt to
                   reflect the true throughput, which is
                   usually slower than the best possible
                   for a given baud rate */

#define TIMES 3            /* Times per second that we check for
                   typeahead */

static struct sgttyb oarg;
static struct tchars otarg;
static struct ltchars oltarg;

static unsigned char *obuf=0;
static unsigned obufp=0;
static unsigned obufsiz;
static unsigned long ccc;

static unsigned speeds[]=
{
B50,50,B75,75,B110,110,B134,134,B150,150,B200,200,B300,300,B600,600,B1200,1200,
B1800,1800,B2400,2400,B4800,4800,B9600,9600,EXTA,19200,EXTB,38400
};

aopen()
{
int x;
struct sgttyb arg;
struct tchars targ;
struct ltchars ltarg;
fflush(stdout);
signal(SIGHUP,tsignal);
signal(SIGINT,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
signal(SIGPIPE,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGTERM,tsignal);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
ioctl(fileno(stdin),TIOCGETP,&arg);
ioctl(fileno(stdin),TIOCGETC,&targ);
ioctl(fileno(stdin),TIOCGLTC,<arg);
oarg=arg; otarg=targ; oltarg=ltarg;
arg.sg_flags=( (arg.sg_flags&~(ECHO|CRMOD) ) | CBREAK) ;
targ.t_intrc= -1;
targ.t_quitc= -1;
targ.t_eofc= -1;
targ.t_brkc= -1;
ltarg.t_suspc= -1;
ltarg.t_dsuspc= -1;
ltarg.t_rprntc= -1;
ltarg.t_flushc= -1;
ltarg.t_werasc= -1;
ltarg.t_lnextc= -1;
ioctl(fileno(stdin),TIOCSETN,&arg);
ioctl(fileno(stdin),TIOCSETC,&targ);
ioctl(fileno(stdin),TIOCSLTC,<arg);
ccc=0;
for(x=0;x!=30;x+=2)
 if(arg.sg_ospeed==speeds[x])
  {
  ccc=DIVISOR/speeds[x+1];
  break;
  }
if(!obuf)
 {
 if(!(TIMES*ccc)) obufsiz=4096;
 else
  {
  obufsiz=1000000/(TIMES*ccc);
  if(obufsiz>4096) obufsiz=4096;
  }
 if(!obufsiz) obufsiz=1;
 obuf=(unsigned char *)malloc(obufsiz);
 }
}

aclose()
{
aflush();
ioctl(fileno(stdin),TIOCSETN,&oarg);
ioctl(fileno(stdin),TIOCSETC,&otarg);
ioctl(fileno(stdin),TIOCSLTC,&oltarg);
signal(SIGHUP,SIG_DFL);
signal(SIGINT,SIG_DFL);
signal(SIGQUIT,SIG_DFL);
signal(SIGPIPE,SIG_DFL);
signal(SIGALRM,SIG_DFL);
signal(SIGTERM,SIG_DFL);
signal(SIGUSR1,SIG_DFL);
signal(SIGUSR2,SIG_DFL);
}

int have=0;
static unsigned char havec;
static int yep;

static dosig()
{
yep=1;
}

aflush()
{
if(obufp)
 {
 struct itimerval a,b;
 unsigned long usec=obufp*ccc;
 if(usec>=500000/HZ)
  {
  a.it_value.tv_sec=usec/1000000;
  a.it_value.tv_usec=usec%1000000;
  a.it_interval.tv_usec=0;
  a.it_interval.tv_sec=0;
  signal(SIGALRM,dosig);
  yep=0;
  sigsetmask(sigmask(SIGALRM));
  setitimer(ITIMER_REAL,&a,&b);
  write(fileno(stdout),obuf,obufp);
  while(!yep) sigpause(0);
  signal(SIGALRM,SIG_DFL);
  }
 else write(fileno(stdout),obuf,obufp);
 obufp=0;
 }
if(!have)
 {
 fcntl(fileno(stdin),F_SETFL,FNDELAY);
 if(read(fileno(stdin),&havec,1)==1) have=1;
 fcntl(fileno(stdin),F_SETFL,0);
 }
}

anext()
{
aflush();
if(have) have=0;
else if(read(fileno(stdin),&havec,1)<1) tsignal();
return havec;
}

eputc(c)
unsigned char c;
{
obuf[obufp++]=c;
if(obufp==obufsiz) aflush();
}

eputs(s)
char *s;
{
while(*s)
 {
 obuf[obufp++]= *(s++);
 if(obufp==obufsiz) aflush();
 }
}

termtype()
{
unsigned char entry[1024];
unsigned char area[1024];
unsigned char *foo=area;
unsigned char *x=(unsigned char *)getenv("TERM");
if(!x) return;
if(tgetent(entry,x)!=1) return;
height=tgetnum("li");
if(height<2) height=24;
width=tgetnum("co");
if(width<2) width=80;
if(!tgetstr("cs",&foo)) scroll=0;
}

shell(s)
char *s;
{
aclose();
if(fork()) wait(0);
else
 {
 execl(s,s,0);
 _exit(0);
 }
aopen();
}
@EOF

chmod 600 asyncbsd.c

echo x - asynchpux.c
cat >asynchpux.c <<'@EOF'
/* Terminal interface for HPUX
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <stdio.h>
#include <signal.h>
#include <fcntl.h>
#include <time.h>
#include <sys/param.h>
#include <termio.h>
#include "async.h"

#define DIVISOR 12000000
#define TIMES 2

static struct termio oldterm;

static unsigned char *obuf=0;
static unsigned obufp=0;
static unsigned obufsiz;
static unsigned long ccc;

static unsigned speeds[]=
{
B50,50,B75,75,B110,110,B134,134,B150,150,B200,200,B300,300,B600,600,B1200,1200,
B1800,1800,B2400,2400,B4800,4800,B9600,9600,EXTA,19200,EXTB,38400
};

aopen()
{
int x;
struct termio newterm;
fflush(stdout);
signal(SIGHUP,tsignal);
signal(SIGINT,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
signal(SIGPIPE,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGTERM,tsignal);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
signal(SIGPWR,tsignal);
ioctl(fileno(stdin),TCGETA,&oldterm);
newterm=oldterm;
newterm.c_lflag=0;
newterm.c_iflag=IXON|IXOFF|IGNBRK;
newterm.c_oflag=0;
newterm.c_cc[VINTR]= -1;
newterm.c_cc[VQUIT]= -1;
newterm.c_cc[VMIN]=1;
newterm.c_cc[VTIME]=0;
ioctl(fileno(stdin),TCSETAW,&newterm);
ccc=0;
for(x=0;x!=30;x+=2)
 if((newterm.c_cflag&CBAUD)==speeds[x])
  {
  ccc=DIVISOR/speeds[x+1];
  break;
  }
if(!obuf)
 {
 if(!(TIMES*ccc)) obufsiz=4096;
 else
  {
  obufsiz=1000000/(TIMES*ccc);
  if(obufsiz>4096) obufsiz=4096;
  }
 if(!obufsiz) obufsiz=1;
 obuf=(unsigned char *)malloc(obufsiz);
 }
}

aclose()
{
aflush();
ioctl(fileno(stdin),TCSETAW,&oldterm);
signal(SIGHUP,SIG_DFL);
signal(SIGINT,SIG_DFL);
signal(SIGQUIT,SIG_DFL);
signal(SIGPIPE,SIG_DFL);
signal(SIGALRM,SIG_DFL);
signal(SIGTERM,SIG_DFL);
signal(SIGUSR1,SIG_DFL);
signal(SIGUSR2,SIG_DFL);
signal(SIGPWR,SIG_DFL);
}

int have=0;
static unsigned char havec;
static int yep;

static dosig()
{
yep=1;
}

aflush()
{
if(obufp)
 {
 struct itimerval a,b;
 unsigned long usec=obufp*ccc;
 if(usec>=500000/HZ)
  {
  a.it_value.tv_sec=usec/1000000;
  a.it_value.tv_usec=usec%1000000;
  a.it_interval.tv_usec=0;
  a.it_interval.tv_sec=0;
  signal(SIGALRM,dosig);
  yep=0;
  sigsetmask(sigmask(SIGALRM));
  setitimer(ITIMER_REAL,&a,&b);
  write(fileno(stdout),obuf,obufp);
  while(!yep) sigpause(0);
  signal(SIGALRM,SIG_DFL);
  }
 else write(fileno(stdout),obuf,obufp);
 obufp=0;
 }
if(!have)
 {
 fcntl(fileno(stdin),F_SETFL,O_NDELAY);
 if(read(fileno(stdin),&havec,1)==1) have=1;
 fcntl(fileno(stdin),F_SETFL,0);
 }
}

anext()
{
aflush();
if(have) have=0;
else if(read(fileno(stdin),&havec,1)<1) tsignal();
return havec;
}

eputc(c)
unsigned char c;
{
obuf[obufp++]=c;
if(obufp==obufsiz) aflush();
}

eputs(s)
char *s;
{
while(*s)
 {
 obuf[obufp++]= *(s++);
 if(obufp==obufsiz) aflush();
 }
}

termtype()
{
unsigned char entry[1024];
unsigned char area[1024];
unsigned char *foo=area;
unsigned char *x=(unsigned char *)getenv("TERM");
if(!x) return;
if(tgetent(entry,x)!=1) return;
height=tgetnum("li");
if(height<2) height=24;
width=tgetnum("co");
if(width<2) width=80;
if(!tgetstr("cs",&foo)) scroll=0;
}

shell(s)
char *s;
{
aclose();
if(fork()) wait(0);
else
 {
 execl(s,s,0);
 _exit(0);
 }
aopen();
}
@EOF

chmod 600 asynchpux.c

echo x - asyncxenix.c
cat >asyncxenix.c <<'@EOF'
/* Terminal interface for XENIX
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <stdio.h>
#include <signal.h>
#include <termio.h>
#include "async.h"

#define DIVISOR 12000
#define TIMES 2

static struct termio oldterm;

static unsigned char *obuf=0;
static unsigned obufp=0;
static unsigned obufsiz;
static unsigned long ccc;

static unsigned speeds[]=
{
B50,50,B75,75,B110,110,B134,134,B150,150,B200,200,B300,300,B600,600,B1200,1200,
B1800,1800,B2400,2400,B4800,4800,B9600,9600,EXTA,19200,EXTB,38400
};

aopen()
{
int x;
struct termio newterm;
fflush(stdout);
signal(SIGHUP,tsignal);
signal(SIGINT,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
signal(SIGPIPE,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGTERM,tsignal);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
signal(SIGPWR,tsignal);
ioctl(fileno(stdin),TCGETA,&oldterm);
newterm=oldterm;
newterm.c_lflag=0;
newterm.c_iflag=IXON|IXOFF|IGNBRK;
newterm.c_oflag=0;
newterm.c_cc[VINTR]= -1;
newterm.c_cc[VQUIT]= -1;
newterm.c_cc[VMIN]=1;
newterm.c_cc[VTIME]=0;
ioctl(fileno(stdin),TCSETAW,&newterm);
ccc=0;
for(x=0;x!=30;x+=2)
 if((newterm.c_cflag&CBAUD)==speeds[x])
  {
  ccc=DIVISOR/speeds[x+1];
  break;
  }
if(!obuf)
 {
 if(!(TIMES*ccc)) obufsiz=4096;
 else
  {
  obufsiz=1000/(TIMES*ccc);
  if(obufsiz>4096) obufsiz=4096;
  }
 if(!obufsiz) obufsiz=1;
 obuf=(unsigned char *)malloc(obufsiz);
 }
}

aclose()
{
aflush();
ioctl(fileno(stdin),TCSETAW,&oldterm);
signal(SIGHUP,SIG_DFL);
signal(SIGINT,SIG_DFL);
signal(SIGQUIT,SIG_DFL);
signal(SIGPIPE,SIG_DFL);
signal(SIGALRM,SIG_DFL);
signal(SIGTERM,SIG_DFL);
signal(SIGUSR1,SIG_DFL);
signal(SIGUSR2,SIG_DFL);
signal(SIGPWR,SIG_DFL);
}

int have=0;

aflush()
{
if(obufp)
 {
 write(fileno(stdout),obuf,obufp);
 nap(obufp*ccc);
 obufp=0;
 }
if(!have) if(rdchk(fileno(stdin))>0) have=1;
}

anext()
{
unsigned char c;
aflush();
if(read(fileno(stdin),&c,1)<1) tsignal();
have=0;
return c;
}

eputc(c)
unsigned char c;
{
obuf[obufp++]=c;
if(obufp==obufsiz) aflush();
}

eputs(s)
char *s;
{
while(*s)
 {
 obuf[obufp++]= *(s++);
 if(obufp==obufsiz) aflush();
 }
}

termtype()
{
unsigned char entry[1024];
unsigned char area[1024];
unsigned char *foo=area;
unsigned char *x=(unsigned char *)getenv("TERM");
if(!x) return;
if(tgetent(entry,x)!=1) return;
height=tgetnum("li");
if(height<2) height=24;
width=tgetnum("co");
if(width<2) width=2;
if(!tgetstr("cs",&foo)) scroll=0;
}

shell(s)
char *s;
{
aclose();
if(fork()) wait(0);
else
 {
 execl(s,s,0);
 _exit(0);
 }
aopen();
}
@EOF

chmod 600 asyncxenix.c

echo x - blocks.c
cat >blocks.c <<'@EOF'
/* Various memory block functions
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include "blocks.h"

/* Set block to zero */

unsigned char *bzero(bk,sz)
unsigned char *bk;
{
unsigned char *b=bk-1;
if(sz) do b[sz]=0; while(--sz);
return bk;
}

/* Set block to unsigned character */

unsigned char *bset(bk,sz,c)
unsigned char *bk;
unsigned char c;
{
unsigned char *b=bk-1;
if(sz) do b[sz]=c; while(--sz);
return bk;
}

/* Move a possibly overlapping block of memory without loosing any data */

unsigned char *bmove(dst,src,sz)
unsigned char *dst;
unsigned char *src;
{
if(src==dst || !sz) return dst;
if(src>dst)
 {
 unsigned x=0;
 do dst[x]=src[x]; while(++x, --sz);
 }
else
 {
 unsigned char *d=dst-1;
 --src;
 do d[sz]=src[sz]; while(--sz);
 }
return dst;
}

/* Move a block in the forward direction */

unsigned char *bfwrd(dst,src,sz)
unsigned char *dst;
unsigned char *src;
{
if(src!=dst && sz)
 {
 unsigned x=0;
 do dst[x]=src[x]; while(++x,--sz);
 }
return dst;
}

/* Move a block in the backward direction */

unsigned char *bbkwd(dst,src,sz)
unsigned char *dst;
unsigned char *src;
{
unsigned char *s=src-1, *d=dst-1;
if(s!=d && sz) do d[sz]=s[sz]; while(--sz);
return dst;
}

unsigned umin(a,b)
unsigned a,b;
{
return (a>b)?b:a;
}

unsigned umax(a,b)
unsigned a,b;
{
return (a>b)?a:b;
}

int min(a,b)
{
return (a>b)?b:a;
}

int max(a,b)
{
return (a>b)?a:b;
}

/* Compare blocks for equality */

int beq(dst,src,sz)
unsigned char *dst;
unsigned char *src;
{
unsigned char *d=dst-1, *s=src-1;
if(!sz) return 1;
do
 if(d[sz]!=s[sz]) return 0;
while(--sz);
return 1;
}

/* Compare blocks for equality case insensitive */

int bieq(dst,src,sz)
unsigned char *dst;
unsigned char *src;
{
unsigned char *d=dst, *s=src; int cnt=sz;
if(!cnt) return 1;
do
 if(*s>='a' && *s<='z')
  {
  if(*d>='a' && *d<='z') { if(*(d++)!=*(s++)) return 0; }
  else if(*(d++)!=(0x5f&*(s++))) return 0;
  }
 else if(*d>='a' && *d<='z')
  {
  if(*s>='a' && *s<='z') { if(*(d++)!=*(s++)) return 0; }
  else if(*(s++)!=(0x5f&*(d++))) return 0;
  }
 else if(*(d++)!=*(s++)) return 0;
while(--cnt);
return 1;
}

unsigned char *bchr(bk,sz,c)
unsigned char *bk;
unsigned char c;
{
unsigned char *s=bk;
int cnt=sz;
if(cnt)
 do if(*s==c) return s;
 while(++s, --cnt);
return 0;
}

unsigned char *brchr(bk,sz,c)
unsigned char *bk, c;
{
unsigned char *s=bk+sz;
int cnt=sz;
if(cnt)
 do if(*(--s)==c) return s;
 while(--cnt);
return 0;
}
@EOF

chmod 600 blocks.c

echo x - blocks.h
cat >blocks.h <<'@EOF'
/* Memory block functions header file
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

unsigned char *bzero();
unsigned char *bset();
unsigned char *bmove();
unsigned char *bfwrd();
unsigned char *bbkwd();
unsigned umin();
unsigned umax();
int min();
int max();
int beq();
int bieq();
unsigned char *bchr();
unsigned char *brchr();
@EOF

chmod 600 blocks.h

echo x - cruddy.c
cat >cruddy.c <<'@EOF'
/* Cruddy terminal interface - should be very portable though
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */


#include <stdio.h>
#include <signal.h>
#include "async.h"

int have=0;

eputs(s)
char *s;
{
fputs(s,stdout);
}

eputc(c)
{
putchar(c);
}

aopen()
{
fflush(stdout);
system("/bin/stty raw -echo ixon ixoff");
signal(SIGHUP,tsignal);
signal(SIGINT,SIG_IGN);
signal(SIGQUIT,SIG_IGN);
signal(SIGPIPE,SIG_IGN);
signal(SIGALRM,SIG_IGN);
signal(SIGTERM,tsignal);
signal(SIGUSR1,SIG_IGN);
signal(SIGUSR2,SIG_IGN);
}

aclose()
{
fflush(stdout);
signal(SIGHUP,SIG_DFL);
signal(SIGINT,SIG_DFL);
signal(SIGQUIT,SIG_DFL);
signal(SIGPIPE,SIG_DFL);
signal(SIGALRM,SIG_DFL);
signal(SIGTERM,SIG_DFL);
signal(SIGUSR1,SIG_DFL);
signal(SIGUSR2,SIG_DFL);
system("/bin/stty cooked echo");
}

aflush()
{
}

anext()
{
unsigned char c;
fflush(stdout);
while(read(fileno(stdin),&c,1)!=1);
return c;
}

termtype()
{
/*
char entry[1024];
char area[1024];
char *foo=area;
char *x=(char *)getenv("TERM");
if(!x) return;
if(tgetent(entry,x)<1) return;
height=tgetnum("li");
if(height<1) height=24;
width=tgetnum("co");
if(width<2) width=80;
if(!tgetstr("cs",&foo)) scroll=0;
*/
}

shell(s)
char *s;
{
aclose();
if(fork()) wait(0);
else
 {
 execl(s,s,0);
 _exit(0);
 }
aopen();
}
@EOF

chmod 600 cruddy.c

echo x - j.1
cat >j.1 <<'@EOF'
..TH J 1
..SH NAME
j \- Joe's Screen Editor
..SH SYNOPSIS
..B j file
..br
..BR j
..SH DESCRIPTION
J is a screen editor designed to be easy to learn for novice users and
powerfull enough for experienced users.  After you invoke the editor, you can
hit ^K H ('^' mean hold the Ctrl key down while pressing the following key) to
turn on the help text.  From this you should be able to figure out how to use
the editor.  A few things need further explanation however:

J uses the "TERM" environment entry and termcap to determine the height and
width of the screen and to determine if the terminal uses scrolling regions.
Except for these differences the terminal must be ANSI/VT100 compatible.

^K J reformats the current paragraph.  ^T R can be used to change the right
margin.  The default is the width of the screen.  If auto-indent mode is set,
indented paragraphs are formated.

Use ^K B to set the beginning of a block and ^K K to set the end of a block.
You can then copy, move save or delete the marked blocsk.  To turn the
highlighting off, hit ^K B ^K K (make the beginning and ending the same or
move the beginning past the ending or move the ending before the beginning).

^K O splits a window into two.  You can then use ^K E to load a file into the
new window.  ^K I shows either one window or it shows all of the windows.  Use
^C to eliminate a window.

Control characters (0-31, 127) are shown underlined.  Characters above 127 are
shown in inverse.  You can use ` and ^\ to enter control characters
orcharacters with the 7th bit set.

Hit ^K F to find text.  You will be prompted to enter the search string.
After hitting Return, you will be prompted for options- you can type 1 or more
of:

..br
            i    Ignore case
..br
            b    Backwards
..br
            r    Replace
..br
            nnn    Find the nth occurance or do nnn replacements
..br

        If you hit r, you will also be prompted to enter the
        replacement string.

        Hit ^L to find the next occurance of the previous search
        string (with all the same options).

If for some reason J gets a signal (that it's going to crash or that the
system is messing up), it attempts to save the last file edited in a file
"aborted.j" in the current directory.

..SH FILES
..DT
..ta 25n
keymap.j            Keymap file.  J looks for this in the current
                directory, the user's home directory and in
                the directory containing J
..SH RESTRICTIONS
The file size is limited to the system process size limit

..SH BUGS
Send bug reports to [e-mail] (Joseph H. Allen).  This should be
valid to at least January, 1991.  You can also contact me through snail mail:

..br
        Joseph H. Allen
..br
        28 Dale Lane
..br
        Smithtown, N.Y. 11787
@EOF

chmod 600 j.1

echo x - j.c
cat >j.c <<'@EOF'
/* J - Joe's Editor - the bulk of the code is here
   Copyright (C) 1991 Joseph H. Allen

This file is part of J (Joe's Editor)

J is free software; you can redistribute it and/or modify it under the terms
of the GNU General Public License as published by the Free Software
Foundation; either version 1, or (at your option) any later version.

J is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
without even the implied warranty of MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.  See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GNU Emacs; see the file COPYING.  If not, write to
the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include <stdio.h>
/* #include <stdlib.h> */
#include <string.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
#include <pwd.h>
extern errno;
#include "async.h"
#include "blocks.h"
#include "j.h"
int width=80;
int height=24;
int scroll=1;

unsigned char stalin[PATHSIZE];

int smode=0;
int tops=0;
int bots;
int oxpos=0;            /* Current cursor position */
int oypos=0;
int *scrn;            /* Screen buffer address */

unsigned char *omsg=0;           /* Pointer to opening message */

dopen()
{
int x;
unsigned char buf[30];
scrn=(int *)malloc(width*height*sizeof(int));
for(x=0;x<width*height;x++) scrn[x]= ' ';
if(scroll)
 {
 sprintf(buf,"\033[0m\033[1;%dr\033[H\033[J",height), eputs(buf);
 bots=height-1;
 }
else eputs("\033[0m\033[H\033[J");
}

dclose(ms)
unsigned char *ms;
{
setregn(0,height-1);
cpos(height-1,0);
tputss(ms);
eputs("\033[K");
oxpos=strlen(ms);
cpos(height-1,0);
eputc(10);
}

cposs(y,x)
{
unsigned char s[9];
if(y>bots || y<tops) setregn(0,height-1);
if(y==oypos)
 {
 if(x==oxpos) return;
 if(x==0)
  {
  eputc(13);
  return;
  }
 if(oxpos>=x+1 && oxpos<=x+4)
  {
  while(oxpos!=x) eputc(8), x++;
  return;
  }
 if(x>=oxpos+1 && x<=oxpos+4)
  {
  while(x!=oxpos) tputcc(scrn[oypos*width+oxpos++]);
  return;
  }
 if(x>oxpos)
  sprintf(s,"\033[%dC",x-oxpos);
 else
  sprintf(s,"\033[%dD",oxpos-x);
 eputs(s);
 return;
 }
if(x==oxpos)
 {
 if(y>=oypos+1 && y<=oypos+4)
  {
  while(y!=oypos) /* acheck(), */ eputc(10), oypos++;
  return;
  }
 if(y==0 && x==0)
  {
  eputs("\033[H");
  }
 if(y>oypos)
  sprintf(s,"\033[%dB",y-oypos);
 else
  sprintf(s,"\033[%dA",oypos-y);
 eputs(s);
 return;
 }
if(x<3 && y>oypos && y<oypos+5)
 {
 while(oypos!=y) ++oypos, eputc('\012');
 eputc('\015'); oxpos=0;
 while(x!=oxpos) tputcc(scrn[oypos*width+oxpos++]);
 return;
 }
if(x==0 && y==0)
 {
 eputs("\033[H");
 return;
 }
if(x==0)
 {
 sprintf(s,"\033[%dH",y+1);
 eputs(s);
 return;
 }
sprintf(s,"\033[%d;%dH",y+1,x+1);
eputs(s);
return;
}

cpos(y,x)
{
cposs(y,x);
oxpos=x;
oypos=y;
}

setregn(top,bot)
{
unsigned char sst[16];
if(top!=tops || bots!=bot)
 {
 tops=top;
 bots=bot;
 if(scroll)
  {
  oxpos=0;
  oypos=0;
  sprintf(sst,"\033[%d;%dr",top+1,bot+1);
  eputs(sst);
  }
 }
}

attrib(x)
{
if(smode== -1) goto clr;
if(!(x&INVERSE) && (smode&INVERSE)) goto clr;
if(!(x&BLINK) && (smode&BLINK)) goto clr;
if(!(x&UNDERLINE) && (smode&UNDERLINE)) goto clr;
if(!(x&BOLD) && (smode&BOLD)) goto clr;
goto ovr;
clr:
smode=0;
eputs("\033[m");
ovr:
if(x&INVERSE && !(smode&INVERSE)) eputs("\033[7m");
if(x&BLINK && !(smode&BLINK)) eputs("\033[5m");
if(x&UNDERLINE && !(smode&UNDERLINE)) eputs("\033[4m");
if(x&BOLD && !(smode&BOLD)) eputs("\033[1m");
smode=x;
}

int uuu=0;
int cntr=0;
int upd=1;
int hupd=0;
int newy=1;
int helpon=0;
int wind=0;
int xpos=0;
int ypos=0;
TXTSIZ saddr=0;
TXTSIZ xoffset=0;

unsigned char help[]=
"\
\240\240\240\310\345\354\360\240\323\343\362\345\345\356\240\240\240\364\365\
\362\356\240\357\346\346\240\367\351\364\350\240\336\313\310\240\240\
\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\
\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\240\
\240\240\240\240\240\240\240\
\240\
\7\017 \024\017             \4\5\014\5\024\5    \015\011\023\03       \02\
\014\017\03\013    \06\011\016\04     \021\025\017\024\05    \027\011\016\04\017\
\027     \
\240\
\240\
^B left  ^F right ^D single ^T  mode   ^KB mark ^KF text `  Ctrl  ^KO split  \
\240\
\240\
^Z word  ^X word  ^W >word  ^R  retype ^KK end  ^L  next ^\\ bit-7 ^KI 1 / all\
\240\
\240\
^A edge  ^E edge  ^O word<  ^KA center ^KC copy ^KL line \06\011\014\
\05     ^KP up     \
\240\
\240\
^P up    ^N down  ^J >line  ^KJ format ^KM move \05\
\030\011\024     ^KD save ^KN down   \
\240\
\240\
^U page  ^V page  ^Y line   ^KZ shell  ^KW save ^KX save ^KR read ^KG grow   \
\240\
\240\
^KU top ^KV end   ^K- undo  ^K, indnt< ^KY kill ^C abort/         ^KT shrink \
\240\
\240\
^G matching ([<{` ^K+ redo  ^K. indnt>             close window  ^KE get file\
\240";

/* Clear end of line if needed.  i is row number and j is column number */

clreolchk(i,j)
TXTSIZ j;
{
int *k=scrn+i*width;
int t, jj;
if(j<xoffset) jj=0;
else
 if(j>=xoffset+width-1) return;
 else jj=j-xoffset;
for(t=width-1;t>=jj;--t) if(k[t]!=' ') goto ohoh;
return;
ohoh:
if(t==jj)
 {
 cpos(i,jj);
 tputcc(' ');
 k[jj]=' ';
 oxpos++;
 return;
 }
while(t>=jj) k[t--]=' ';
cpos(i,jj);
tattrib(' ');
eputs("\033[K");
}

int udline(i)
{
int q=i*width;
TXTSIZ j;
int t;
int u;
unsigned char ch;
for(j=0;1;j++)
 {
 if(have) return -1;
 if(fmeof())
  {
  clreolchk(i++,j);
  j=0;
  while(i<curwin->wind+curwin->height) clreolchk(i++,j);
  return 1;
  }
 ch=fmgetc();
 if(ch==NL)
  {
  clreolchk(i,j);
  return 0;
  }
 if(ch==TAB)
  {
  ch=' ';
  if(fmnote()-1>=markb && fmnote()<=marke && curbuf==markbuf) ch^=128;
  t=i*width+j-xoffset;
  do
   {
   if(j>=xoffset && j<xoffset+width-1)
    {
    u=scrn[t];
    if(ch!=u || u==-1)
     {
     cpos(i,(int)(j-xoffset));
     scrn[t]=ch;
     tputcc(ch);
     oxpos++;
     }
    }
   t++;
   j++;
   } while(j&7);
  j--;
  }
 else
  {
  if(fmnote()-1>=markb && fmnote()<=marke && curbuf==markbuf) ch^=128;
  t=q+j-xoffset;
  if(j>=xoffset && j<xoffset+width-1)
   {
   u=scrn[t];
   if(ch!=u || u==-1)
    {
    cpos(i,(int)(j-xoffset));
    scrn[t]=ch;
    tputcc(ch);
    oxpos++;
    }
   }
  }
 }
}

int udscrn()
{
int i;
int v;
for(i=ypos;i<curwin->height+curwin->wind;i++)
 if(v=udline(i)) break;
if(v== -1) return 0;
fmpoint(saddr);
for(i=curwin->wind+1;i<ypos;i++)
 if(udline(i)) return 0;
return 1;
}

dupdate1(fgf)
{
int y;
TXTSIZ x;
TXTSIZ sve=fmnote();

TXTSIZ sve1;

/* Status line */
bset(stalin,width-1,' ');
bfwrd(stalin,"File:",5);
if(changed)
 if(gfnam[0]) bfwrd(bfwrd(stalin+6,gfnam,strlen(gfnam))+strlen(gfnam),
 " (Modified)",11);
 else bfwrd(bfwrd(stalin+6,"(Unnamed)",9)+9," (Modified)",11);
else
 if(gfnam[0]) bfwrd(stalin+6,gfnam,strlen(gfnam));
 else bfwrd(stalin+6,"(Unnamed)",9);
if(!helpon) bfwrd(stalin+width-22,"Hit Ctrl-K H for help",21);

for(y=0;y<width-1;y++)
 if(scrn[y+curwin->wind*width]!=stalin[y]+128)
  {
  if(have) break;
  cpos(curwin->wind,y);
  tputcc(stalin[y]+128);
  scrn[y+curwin->wind*width]=stalin[y]+128;
  oxpos++;
  }

x=getcol();
if(fmnrnl()) fmpoint(fmnote()+1);
sve1=fmnote();

/* calculate what screen cursor position should be */

if(x>xoffset+width-2)
 xpos=width-2, xoffset=x-width+2;
else
 if(x<xoffset)
  xpos=0, xoffset=x;
 else
  xpos=x-xoffset;

/* calculate new y cursor position and point to beginning of screen */

if(newy)
 {
 if(fmnote()<=saddr)
  {
  ypos=curwin->wind+1;
  saddr=fmnote();
  }
 else
  {
  /* is cursor within 24 lines of old beginning of screen */

  for(y=0;y!=curwin->height-2;y++)
   {
   if(fmnote()==saddr) goto over;
   fmrgetc();
   if(fmnrnl()) fmpoint(fmnote()+1);
   }
  if(cntr)
   {
   for(x=0;x<(curwin->height-1)/2;x++)
    {
    fmfnl();
    y--;
    fmgetc();
    }
   }
  over:
  cntr=0;
  saddr=fmnote();
  ypos=y+curwin->wind+1;
  }
 newy=0;
 }

/* Now update screen */
if(have)
 { if(fgf) cpos(ypos,xpos); }
else
 {
 fmpoint(sve1);
 if(udscrn()) upd=0;
 if(fgf) cpos(ypos,xpos);
 }
fmpoint(sve);
}

dupdatehelp()
{
int i,j;
unsigned char *from=help;
int *too=scrn;
wind=helplines;
for(i=0;i!=helplines;i++)
 {
 for(j=0;j!=helpwidth;j++)
  {
  if(have) return;
  if(j>=width-1)
   {
-- Cut here
--
/*  [e-mail] */      /* Amazing */             /* Joseph H. Allen */
int a[1817];main(z,p,q,r){for(p=80;q+p-80;p-=2*a[p])for(z=9;z--;)q=3&(r=time(0)
+r*57)/7,q=q?q-1?q-2?1-p%79?-1:0:p%79-77?1:0:p<1659?79:0:p>158?-79:0,q?!a[p+q*2
]?a[p+=a[p+=q]=q]=q:0:0;for(;q++-1817;)printf(q%79?"%c":"%c\n"," #"[!a[q-1]]);}