Almathera Ten Pack 2: CDPD 1/Almathera Ten on Ten - Disc 2: CDPD 1.iso/pd/051-075/061/microemacs/readme

Text File | 1995-03-13 | 21KB | 601 lines

        MicroEMACS 3.8b Release Notes

**********************************************************************

    (C)opyright 1987 by Daniel M. Lawrence
    MicroEMACS 3.8 can be copied and distributed freely for any
    non-commercial purposes. MicroEMACS 3.8 can only be incorporated
    into commercial software with the permission of the current author.

(    Notice the copyright.....a number of large companies decided to use
MicroEMACS 3.7 and 3.7i as the shell of their products, and several of
the ones I contacted were not even courteos enough to send me their
product for my personal use.  I am not out to make a fortune on this,
but a little common courtesy would be appreciated.)

**********************************************************************

    It has been quite a while since the last realease and there are
a large number of new features and enhancements to old features.  There
is now a full extension language and there is also support nearly
completed for a number of newer 68000 machines.  The edit history at the
beginning of the MAIN.C file details the changes.

    MicroEMACS 3.8 is availible in a couple of different ways.
First, it is availible via my bulletin board system.....

    The Programmer's Room
    FIDO 201/2
    [phone]
    24 hours  300/1200 baud

    Also it should be online on the following BBS's:

    The Starship Trooper    Fido 201/1    [phone]    2400
    Avatar            Fido 201/4    [phone]    1200

    There it is arranged as three MSDOS .ARC files, EMACSDOC.ARC
which contains the documentation and command files, EMACSSRC.ARC which
contains the sources and the UNIX Makefile, and EMACSEXE.EXE which
contains the MSDOS executables.  Also all the various executables are
availibile individualy.

EMACSDOC.ARC includes the files:

    README        This file

    EMACS.RC    Standard startup file
    ME110.RC    HP110 startup file
    ME150.RC    HP150 startup file


    EMACS.HLP    Online help file
    EMACS.KEY    Cammond wallchart
    EMACS.TUT    Online tutorial
    EMACS.MSS       Emacs Introduction document
    EMACS1.MSS    Emacs Reference guide
    IBMFN.LST    IBM-PC function list
    MAGIC.DOC    Regular partern matching bulletin

    AZMAP.CMD    Translate .SYM files to .MAP
    BDATA.CMD    BASIS Data statement builder
    MENU.CMD    Sample Menu system
    MENU1           datafile for menu syste

EMACSSRC.ARC includes the files:

    ANSI.C        ANSI screen driver
    BASIC.C        basic cursor movement
    BIND.C        key binding commands
    BUFFER.C    buffer manipulation commands
    CRYPT.C        encryption functions
    DG10.C        Data General 10 screen driver
    DISPLAY.C    main display driver
    EBIND.H        binding list
    EDEF.H        global variable declarations
    EFUNC.H        function name list
    EGAPC.C        EGA screen driver
    EPATH.H        default path settings
    ESEARCH.H    search global declarations
    ESTRUCT.H    configuration and structure definitions
    EVAL.C        expresion evaluator
    EVAR.H        EMACS macro variable declarations
    EXEC.C        macro execution functions
    FILE.C        user file functions
    FILEIO.C    low level file I/O driver
    HP110.C        HP110 screen driver
    HP150.C        HP150(A or C) screen driver
    IBMPC.C        IBM-PC CGA and MONOCHROME driver
    INPUT.C        low level user input driver
    ISEARCH.C    incremental search functions
    LINE.C        text line manipulation functions
    LOCK.C        file locking functions
    MAIN.C        argument parsing and command loop
    RANDOM.C    other random user functions
    REGION.C    region cut & paste functions
    SEARCH.C    search and replace functions
    SPAWN.C        OS interface driver
    ST520.C        ATARI ST1040 screen driver [not verified]
    TCAP.C        Termcap screen driver
    TERMIO.C    low level I/O driver
    TIPC.C        TI-PC screen driver
    VMSVT.C        VMS screen driver
    VT52.C        VT52 screen driver
    WINDOW.C    window manipulation functions
    WORD.C        word manipulation functions

EMACSEXE.ARC includes the files:

    MEIBM.EXE    IBM-PC CGA and MONO version
    MEEGA.EXE    IBM-PC EGA version
    MEANSI.EXE    MSDOS ANSI graphics version
    ME110.EXE    HP110 portable version
    ME150.EX    HP150 version

    Also MicroEMACS should be availible from USENET via the
mod.sources notegroup, or its archives. A number of sites also make
MicroEMACS availible via FTP. Watch USENET news for info on these.

    MicroSCRIBE 1.0, which I had hoped to have ready by now, is only
about half written.  MicroEMACS took up more of my time in updates then
I had expected, however having this fairly advanced, and hopefully
fairly stable version, I can get back to getting MicroSCRIBE written.
Also in the works for a later release is a spell checker (called
MicroSPELL rather predictably) and sometime next year, a integrated
thesaurus program.

    A more customized MicroEMACS for the Macintosh, the Amiga and
the 1040ST will probably become availible in the next couple of months.
Support for the mouse, standard file boxes, pull down menus and
different resolutions will be included.  If you can be of help in
getting this ready, please contact me.

    As before, I will continue to support these programs, and
encourage everyone to spread them around as much as they can. If you
make what you think are changes that are usefull to many, send me the
updates, and as time permits, I will encorporate the ones I understand,
and agree with into the master sources. Being overswamped with mailers,
I have discontinued my mailing offer, but if you have a special problem
getting hold of MicroEMACS, contact me and we can work something out for
you.

    USmail:    Daniel Lawrence
        617 New York St
        Lafayette, IN 47901

    UUCP:    ihnp4!pur-ee!pur-phy!duncan!lawrence
    or    ihnp4!itivax!duncan!lawrence
    ARPA:    [e-mail]
    FIDO:    The Programmer's Room 201/2
        [phone]
    ATT:    [phone]




        New Features
        ============

***    Path Searching

    If the OS of the operating system MicroEMACS is running under
has environmental variables, MicroEMACS will read in the PATH variable
as a list of directories in which to look for its startup and help
files, in place of the list in the epath.h file.

***    Bindable Prefixes

    All the prefix keys can now be rebound. This includes:

        meta-prefix        <ESC>
        ctlx-prefix        ^X
        universal-argument    ^U
        quote-character        ^Q

***    HP150 function keys

    can now both be labeled and bound.

***    New Help Function

    The APROPOS (M-A) function prompts for a string, and then
prepares a list of all named functions that contain the string. This is
usefull for finding all comands that deal with one topic.

***    File Encryption

    Text files can now be encrypted (and decrypted <very useful>).
The encryption method (written by Dana Hoggat) results in ALL legal
printing characters, leaving files suitable for mailing and moving
around between systems. The -k <encryption key> command line switch
places the first file into the edit buffer using the named key. CRYPT is
a mode which can be set on any buffer, and set-encryption-key (M-E) sets
the encryption key of the current buffer. If you attempt to write out a
buffer in crypt mode without specifying the key, MicroEMACS will
automatically prompt you for it.

***    Keyboard Macros rewritten

    The code for processing keyboard macros now records the responses
to all prompts as well as just the command keystrokes.

***    Restrictive Mode

    The -r command line switch prevents EMACS from executing many of
its commands which would allow you to break out of it, or edit files
other then the ones named on the command line.  This is usefull for
products that need to restrict access to the OS from inside the editor
(for example, BBS systems).

***    Word wrap made more flexible

    When emacs determined it is time to word wrap (when in wrap
mode) it calls the function which is bound to the illegal keystroke,
M-FNW. This keystroke is normally bound to wrap-word (M-FNW), but can be
rebound by the user so EMACS can do different things at wrap time (like
auto indention in different languages).

***    Fence Matching

    The goto-matching-fence (M-^F) command jumps the cursor to the
matching fence, or beeps if there is none.

***    Dynamic Screen Re-sizing

    The size that EMACS uses for editing can be changed with the
change-screen-size (M-^S) and change-screen-width (M-^T) commands. These
can then be usefull in integrating EMACS on window based machines.

***    IBMPC drivers combined...

    The IBM-PC CGA and MONOCHROME drivers have been combined into
one driver which will look up the graphics adapter type at startup and
adjust accordingly.

***    EXTENTION LANGUAGE

    MicroEMACS is now equipped with a fully functional extention
language in which to write macros.  These macros can be saved, recalled
and bound to keystrokes, thus allowing a high degree of customization.
What follows is an exerpt from what will become the new MicroEMACS
reference manual.

Chapter x:        MicroEMACS Macros

    Macros are programs that are used to customize the editor and to
perform complicated editing tasks.  They may be stored in files or
buffers and may be executed using an appropriate command, or bound to a
particular keystroke.  Portions of the standard start-up file are
impliment via macros, as well as the example menu system.  The
execute-macro-<n> editor commands cause the macros, numbered from 1 to
40, to be executed.  Macros are stored by executing files that contain
the store-macro command.

    There are many different aspects to the macro langage within
MicroEMACS.  Editor commands are the various commands that manipulate
text, buffers, windows, etc, within the editor.  Directives are commands
which control what lines get executed within a macro.  Also there are
various types of variables.  Environmental variables both control and
report on different aspects of the editor.  User variables hold string
values which may be changed and inspected.  Buffer variables allow text
to be placed into variables.  Interactive variable allow the program to
prompt the user for information.  Functions can be used to manipulate
all these variables.

x.00    Variables

    Variables in MicroEMACS can be used to return values within
expressions, as repeat counts to editing commands, or as text to be
inserted into buffers and messages.  The value of these variables is set
using the set (^X-A) command.  For example, to set the current fill
column to 64 characters, the following macro line would be used:

    set $fillcol 64

    or to have the contents of %NAME inserted at the point in the
current buffer, the command to use would be:

    insert-string %name


x.01    Environmental Variables

    "What good is a quote if you can't change it?"

    These variables are used to change different aspects of the way
the editor works.  Also they will return the current settings if used as
part of an expresion.  All environmental variable names begin with a
dollar sign ($).

    $fillcol    Current fill column
    $pagelen    Number of screen lines used currently
    $curwidth    Number of columns used currently
    $curcol        Current column of point in current buffer
    $curline    Current line of point in current buffer
    $flicker    Flicker Flag
                set to TRUE if IBM CGA
                set to FALSE for most others
    $cbufname    Name of the current buffer
    $cfname        File name of the current buffer
    $sres        Current screen resolution
            (CGA or MONO on the IBM-PC driver...
             EGA on the EGA driver
             LOW MEDIUM or HIGH on the Atari ST1040
             NORMAL on all others)
    $debug        Flag to trigger macro debugging (try it...
                you'll like it!)
    $status        return status of the success of the last command
            (TRUE or FALSE) usually used with !force

    Obviously, many more of these variables will be availible in
future releases of MicroEMACS. (Yes, send a vote for your favorite new
environmental variables today).

x.02    User variables

    User variables allow you, the user, to store strings and
manipulate them.  These strings can be pieces of text, numbers (in text
form), or the logical values TRUE and FALSE.  These variables can be
combined, tested, inserted into buffers, and otherwise used to control
the way your macros execute. At the moment, up to 100 user variables may
be in use in one editing session.  All users variable names must begin
with a percent sign (%) and may contain any printing characters.  Only
the first 10 characters are significant (ie differences beyond the tenth
character are ignored). Most operators will truncate strings to a length
of 128 characters.

x.03    Buffer Variables

    Buffer variables are special in that they can only be queried
and cannot be set.  What buffer variables are is a way to take text from
a buffer and place it in a variable. For example, if I have a buffer by
the name of RIGEL2, and it contains the text:

    Richmond
    Lafayette
    <*>Bloomington        (where <*> is the current point)
    Indianapolis
    Gary
    =* MicroEMACS 3.8 (WRAP) == rigel2 == File: /data/rigel2.txt =====

    and within a command I reference #rigel2, like:

    insert-string #rigel2

    MicroEMACS would start at the current point in the RIGEL2
buffer and grab all the text up to the end of that line and pass that
back.  Then it would advance the point to the beginning of the next line.
Thus, after our last command executes, the string "Bloomington" gets
inserted into the current buffer, and the buffer RIGEL2 now looks like
this:

    Richmond
    Lafayette
    Bloomington
    <*>Indianapolis        (where <*> is the current point)
    Gary
    =* MicroEMACS 3.8 (WRAP) == rigel2 == File: /data/rigel2.txt =====

    as you have probably noticed, a buffer variable consists of the
buffer name, preceded by a pound sign (#).

x.04    Interactive variables

    Interactive variables are actually a method to prompt the user
for a string.  This is done by using an at sign (@) followed either with
a quoted string, or a variable containing a string.  The string is the
placed on the bottom line, and the editor waits for the user to type in
a string.  Then the string typed in by the users is returned as the
value of the interactive variable.  For example:

    set %quest "What file? "
    find-file @%quest

    will ask the user for a file name, and then attempt to find it.


x.10    Functions

    Functions can be used to manipulate variables in various ways.
Functions can have one, two, or three arguments.  These arguments will
always be placed after the function on the current command line.  For
example, if we wanted to increase the current fill column by two, using
emacs's set (^X-A) command, we would write:

    set $fillcol &add $fillcol 2
         \      \      \      \     \____second operand
           \      \      \      \________first operand
             \      \      \_____________function to execute
               \      \__________________variable to set
                 \_______________________set (^X-A) command

    Function names always begin with the ampresand (&) character,
and are only significant to the first three characters after the
ampresand.  Functions will normal expect one of three types of
arguments, and will automatically convert types when needed.

    <num>    an ascii string of digits which is interpeted as a
        numeric value.  Any string which does not start with a
        digit or a minus sign (-) will be considered zero.

    <str>    An arbitrary string of characters.  At the moment,
        strings are limited to 128 characters in length.

    <log>    A logical value consisting of the string "TRUE" or
        "FALSE". Numeric strings will also evaluate to "FALSE"
        if they are equal to zero, and "TRUE" if they are
        non-zero. Arbitrary text strings will have the value of
        "FALSE".

    A list of the currently availible functions follows: (Once
again, send in those votes on what kind of functions you would like to
see added!)

Numeric Functions:    (returns <num>)

&ADD        <num> <num>    Add two numbers
&SUB        <num> <num>    Subtract the second number from the first
&TIMes        <num> <num>    Multiply two numbers
&DIVide        <num> <num>    Divide the first number by the second
                giving an integer result
&MOD        <num> <num>    Return the reminder of dividing the
                first number by the second
&NEGate        <neg>        Multiply the arg by -1


String manipulation functions:    (returns <str>)

&CAT        <str> <str>    Concatinate the two strings to form one
&LEFt        <str> <num>    return the <num> leftmost characters
                from <str>
&RIGht        <str> <num>    return the <num> rightmost characters
                from <str>
&MID        <str> <num1> <num2>
                Starting from <num1> position in <str>,
                return <num2> characters.

Logical Testing functions:    (returns <log>)

&NOT        <log>        Return the opposite logical value
&EQUal        <num> <num>    If <num> and <num> are numerically
                equal, return TRUE
&LESs        <num1> <num2>    If <num1> is less than <num2>, return
                TRUE.
&GREater    <num1> <num2>    If <num1> is greater than, or equal to
                <num2>, return TRUE.
&SEQual        <str1> <str2>    If the two strings are the same, return
                TRUE.
&SLEss        <str1> <str2>    If <str1> is less alphabetically than
                <str2>, return TRUE.
&SGReater    <str1> <str2>    If <str1> is alphabetically greater than
                or equal to <str2>, return TRUE.

Special Functions:

&INDirect    <str>        Evaluate <str> as a variable.

    This last function deserves more explaination. The &IND function
evaluates its argument, takes the resulting string, and then uses it as
a variable name.  For example, given the following code sequence:

    ; set up reference table

    set %one    "elephant"
    set %two     "giraffe"
    set %three     "donkey"

    set %index "two"
    insert-string &ind %index

    the string "giraffe" would have been inserted at the point in
the current buffer.  This indirection can be safely nested up to about
10 levels.

x.20    Directives

    Directives are commands which only operate within an executing
macro, ie they do not make sense as a single command. As such, they
cannot be called up singly or bound to keystroke. Used within macros,
they control what lines are executed and in what order.

    Directives always start with the exlaimation mark (!) character
and must be the first thing placed on a line. Directives executed singly
(via the execute-command-line command) interactively will be ignored.

x.21    !ENDM Directive

    This directive is used to terminate a macro being stored. For
example, if a file is being executed contains the text:

    ;    Read in a file in view mode, and make the window red
    26    store-macro
        find-file @"File to view: "
        add-mode "view"
        add-mode "red"
    !endm

    write-message "[Consult macro has been loaded]"

    only the lines between the store-macro command and the !ENDM
directive are stored in macro 26.

x.22    !FORCE Directive

    When MicroEMACS executes a macro, if any command fails, the
macro is terminated at that point. If a line is preceeded by a !FORCE
directive, execution continues weather the command succeeds or not. For
example:

    ;    Merge the top two windows

    save-window        ;remember what window we are at
    1 next-window        ;go to the top window
    delete-window        ;merge it with the second window
    !force restore-window    ;This will continue irregardless
    add-mode "red"

x.23    !IF, !ELSE, and !ENDIF Directives

    This directive allows statements only to be executed if a
condition specified in the directive is met.  Every line following the
!IF directive, until the first !ELSE or !ENDIF directive, is only
executed if the expresion following the !IF directive evaluates to a
TRUE value.  For example, the following macro segment creates the
portion of a text file automatically.  (yes believe me, this will be
easier to understand then that last explaination....)

    !if &sequal %curplace "timespace vortex"
        insert-string "First, rematerialize~n"
    !endif
    !if &sequal %planet "earth"    ;If we have landed on earth...
        !if &sequal %time "late 20th century"  ;and we are then
            write-message "Contact U.N.I.T."
        !else
            insert-string "Investigate the situation....~n"
            insert-string "(SAY 'stay here Sara')~n"
        !endif
    !else
        set %conditions @"Atmosphere conditions outside? "
        !if &sequal %conditions "safe"
            insert-string &cat "Go outside......" "~n"
            insert-string "lock the door~n"
        !else
            insert-string "Dematerialize..try somewhen else"
            newline
        !endif
    !endif

x.24    !GOTO Directive

    Flow can be controlled within a MicroEMACS macro using the !GOTO
directive. It takes as an argument a label. A label consists of a line
starting with an asterick (*) and then an alphanumeric label.  Only
labels in the currently executing macro can be jumped to, and trying to
jump to a non-existing label terminates execution of a macro.  For
example..

    ;Create a block of DATA statements for a BASIC program

        insert-string "1000 DATA "
        set %linenum 1000

    *nxtin
        update-screen        ;make sure we see the changes
        set %data @"Next number: "
        !if &equal %data 0
            !goto finish
        !endif

        !if &greater $curcol 60
            2 delete-previous-character
            newline
            set %linenum &add %linenum 10
            insert-string &cat %linenum " DATA "
        !endif

        insert-string &cat %data ", "
        !goto nxtin

    *finish

        2 delete-previous-character
        newline

x.25    !RETURN Directive

    The !RETURN Directive causes the current macro to exit, either
returning to the caller (if any) or to interactive mode.  For example:

    ;    Check the monitor type and set %mtyp

    !if &sres "CGA"
        set %mtyp 1
        !return
    !else
        set %mtyp 2
    !endif

    insert-string "You are on a MONOCHROME machine!~n"

<<<END OF MANUAL EXCERPT>>>