Programmer 7500/MAX_PROGRAMMERS.iso/INFO/EDITOR/TDE120.ZIP/CHANGES.TDE

Text File | 1991-10-05 | 17.4 KB | 458 lines

                          tde, the Thomson-Davis Editor
                                  Version 1.2
                                    10-5-91
                                  Frank Davis

                                    Log file


Inconvenience adjustments, additions, and optimizations for version 1.0:

6-24-91  findrep.c

  When the search came to characters in the extended ASCII set, the extended
  characters were treated as minus indexes.  The result in the backward_boyer_
  moore_search function was an infinite loop and the result was undefined in the
  forward_boyer_moore_search function.   Solution:  typecast the index character
  as an unsigned char to handle the extended ASCII character set.


6-25-91  block.c

  function unmark_block( )

    Do not pass any parameters to function.  We already know the marked
    window is in g_status.marked_window.  Just initialize the block variables
    and redraw all windows, w/o marked block, pointing to g_status.marked_file.

6-25-91  block.c

  function   void move_copy_delete_overlay_block( window, action )


   if (block_type == LINE && action == DELETE && source_window->rline >= br) {
      source_window->rline -= ((er + 1) - br);
      if (source_window->rline < br)
         source_window->rline = br;
   }

  added the above lines to adjust the rline in the source_window of a deleted
  line block when the rline is greater than the beginning of marked row.  this
  puts the cursor of the source window in a pleasing position after a block
  line delete.  when the cursor is past the br, it subtracts the length of
  the marked block from rline.


6-26-91  ed.c

   function   line_kill( window )

   do not reset column to 0 when deleting a line.


6-28-91 thru 6-30-91

   massive changes.  speed up LINE block operations.  speed up writing file
   back to disk.  use the line buffer to recover changes to line and to speed
   up editing large files (like Doug had originally in dte 5.1).   editor now
   handles large file truncations properly.

   I put the line buffer back in tde like Doug originally had in dte 5.1.  For
   small files (files < 64K), the line buffer doesn't make any difference in
   speed, but tde begins to slow down on bigger files (files > 200K) or with
   multiple files.  It's also easier to implement a simple undo function with
   the line buffer back in.


7-1-91  main.c

   improve the video adapter detection algorithm.  add support for different
   cursor sizes depending on state of insert flag.

7-4-91  findrep.c

   function  void goto_end_file( window )

   since we know current line number and number of lines on screen, use simple
   math to determine when to move to eof (if we are already on last page, do
   nothing).  the old algorithm did not properly position at eof when cursor
   was less than a screen full from eof.  the new algorithm is also a little
   smaller and faster.

7-5-91  main.c

   Received suggestion and from Tom Waters, [e-mail].

   "I use ANSI.SYS to redefine a few of my function keys and this causes a
   problem when getch() is used in a program.  For example, instead of returning
   321 for the F7, I get the redefined string inserted in the text. So, instead
   of using getch(), I use the following function..."

        int  getkey( void )   -  at bottom of main.c

   Tom, thanks for the info and the solution.  I'm sure your function will be
   be appreciated by everyone with ANSI key defs, Frank.

   Damn, Doug originally used the bioskey function in his editor, dte 5.1, and
   I took it out (I goofed again).

7-5-91 utils.c

   function:  void word_right( window )

   Inconvenience adjustment from Tom Waters, [e-mail].
   Initialize variable "check" to 0 at beginning of function.

7-5-91  tde.doc

   Finally broke down and wrote a simple manual for tde.

7-10-91 main.c

   function:  int write_file( name, mode, start, end, block, prompt_line )

   Block print/write ending tests need adjustment.  When doing BOX print/write,
   tde missed the last line.  When doing LINE print/write, tde went one
   character too far.

7-11-91 my sister's birthday, her 29th

   Hmmm, I'll set the date on all the files in this version of tde to 7-11-91.
   What more could my sister want on her birthday?  There are only 364 more
   shopping days until her next birthday.

   Added a horizontal screen function and assigned it to ^F10 since it is a
   window function.  Suppose the cursor is somewhere on a line, this function
   redraws the screen, if needed, beginning in column 1 and the cursor stays in
   the same logical column.  (Does a horizontal page 1 thing.)  New function
   name is "column_1" in window.c.

7-12-91  main.c

   Received a request from Bruce Hunter, Tigard, Oregon, USA.

   "How do I get an escape code?  I have tried ALT-027, the control equiva-
   lent, and even tried the escape key.  None of them works.  I need the escape
   sequence for changing screen attributes and entering printer codes in batch
   files..."

   functions:  int  getkey( )
               int  getfunc( int )

   Bruce thanks for the suggestion.  I miss the ability to insert form feeds
   (ALT-012) into text files.

   I rewrote the getkey function in main.c to allow almost any ALT-xxx as a
   normal text character.  I had to modify the key definition array in
   default.h and reassign the values for those keys in the range 0-31 to
   400-431.  ESC is now defined as 427.  The only key you can't enter via
   ALT-xxx is 013 - a return is a return is a return.

7-13-91 utils.c

   function:  void redraw_screen( windows * )
              void redraw_current_window( windows * )

   Modified redraw_screen() to redraw everything on the screen.  I added the
   redraw_current_window() function to redraw the current visible window.
   Now the ^\ function works correctly.

7-13-91  main.c

   function: int getkey( ), void error( )

   Do not allow control z to get thru.  If the user enters ALT-026, make it
   400, which is not assigned to any function.  In the error( ) function, we
   now have to look up the function assigned to a key (AbortCommand).
   key_func[c].func will not work anymore - must go thru getfunc( ) to get the
   function assigned to a key.

7-13-91  default.h  help.h  main.c

   It's hard to believe, but I mapped the control keys to more accurately
   imitate the WordStar type commands.  ^Z is the scroll line down key and
   ^X is the line down key.

7-14-91  main.c help.h

   function:  int getkey( )

   I'm back to my old self, now (a long time WordStar command hater).  I've
   taken the ^W and ^Z WordStar type commands out of the help screen and
   replaced them with the Gray - and Gray + keys.  ^W and ^Z are still
   connected, but are not listed in the help screen.   If Num Lock is off then
   the Gray - and Gray + are scroll functions.  If Num Lock is on then Gray -
   and Gray + are interpreted as - and +.

7-14-91  tde.nmk  tde.qmk

   Received an inconvenience report from Troy Hanson, CC76@SDSUMUS.

   "I have 386/16 running MS DOS 5.0, and normally, I have 630K of base memory
   free.  When trying to use your editor on an almost empty memory, I get a
   message saying that the file is too big for memory.  When I load several
   TSR's low, putting my base memory to below 600k, the editor works great."

   Troy, thanks for the note on MS DOS 5.0.  I read a report, written by a
   Microsoft guy on the Info-IBMPC list, that suggested reducing the maximum
   number of paragraphs needed by a program.  I changed the linker switches in
   the nmake files to take care of this inconvenient feature (was this a
   MS DOS 5.0 or a tde 1.0 feature?).  Can MS DOS 5.01 be far behind?

7-16-91  block.c

   function:  void mark_block( )

   Made small adjustment in the way BOX blocks are marked.  If the cursor is
   above the marked BOX, then expand the block to the cursor instead of
   shrinking BOX to cursor.

7-17-91  block.c

   function:  void expand_tabs( )

   Set g_status.copied to FALSE at end of for loop otherwise un_copy thinks
   line has been copied.

7-18-91  ed.c  findrep.c  main.c  tdestr.h

   Added a diagnostic "wrapped..." message when the search wrapped around the
   beginning or ending of a file.

   After adding that diagnostic switch for wrapped displays, I found that the
   backward_boyer_moore_search function needed an adjustment.  The search start
   needed to begin in a different place than the forward_boyer_moore_search.

7-19-91  ed.c

   function:  void line_kill( )

   If the cursor is on the last line of the screen, the text was not scrolling
   up properly.

7-21-91  tdecolor.exe  tdecolor.c  tdecolor.h  tdecolor.doc

   Might as well knock out a quick and dirty color configuration utility.  Name
   it tdecolor.exe and distribute all source code.

7-22-91  hwind.c  utils.c

   Make a few changes in the way the colors are handled (all minor).  Add
   function window_scroll_up_eof.  tde now gives the user an idea of where the
   eof is if a background color other black is selected.

7-22-91  most files

   Moved the dirty attribute from window structure to file structure.  All
   windows pointing to the dirty file are updated.  It makes more sense to put
   it with the file structure.  Also easier to update the screen in certain
   situations (especially when doing block stuff).  BTW, I finally cleaned up
   the BOX expand tabs - now the algorithm is similar to the regular BOX
   operations.

7-26-91  block.c

   function:  prepare_block( )

   This function added one too many spaces to fill out a line for box
   operations.  The was no problem unless the destination was less than the
   source.  In version 1.0 this was not a problem because space at the end
   of a line was not removed by the un_copy function.  Now, the exact number
   of characters must be added to pad the line or the source for box operations
   will not be correct in some situations.

7-28-91  ed.c

   function:  editor( )

   tde does not check the for initial memory limits properly.  Set stop to
   FALSE if there is not enough memory to open the initial window.

   Play around with the maximum number of paragraphs needed for DOS 5.0.

7-28-91

   tde seems fairly stable now and it has a manual and a simple configuration
   utility.  Changed and checked everything on my "to do" list.  Kick these
   adjustments out the door with a new version number, tde version 1.1, and
   date all the files to my sister's birthday 7-11-91.



Inconvenience adjustments, additions, and optimizations for version 1.1:

8-26-91  findrep.c

   function:  void build_boyer_array( )

   Change char *p as unsigned char *p.  Same damn type of problem that was
   solved on 6-24-91.  Didn't find this feature at that time.

8-31-91 thru 9-2-91   all files

   Received several excellent suggestions from Jim Wilson, Union, NJ, USA.

   1) Multiple full screen windows and swap hidden windows, see ^F9 and ^F10.

   2) Put word delete back in, Control+T.

   3) Added dirty file marker, it's an asterisk in front of file name.

   4) Home toggles between first character on line and column 1, nice!

   5) Fixed scroll up and down, Alt Grey Up and Alt Grey Down.  I didn't fix
      scroll up and scroll down - they weren't broken.  I implemented a
      stationary scroll up and a stationary scroll down.  The cursor stays
      on the same line on the screen while the text scrolls up or down.

   6) Added a toggle for stream delete so delete key joins lines, Ctrl+Del.
      You could eventually delete all characters in a file if in stream mode.

9-2-91  ed.c  main.c  window.c

   Fixed it so that tde does not try to load in a directory as a file.
   Changed the ERROR condition to a WARNING when a file is too big to load
   into memory.

9-2-91  block.c

   function:  block_print( )

   Modified block_print( ) so user may stop printing by pressing ESC.

9-8-91  simul101.asm

   function:  _simulate_enh_kbd( )

   Wrote this routine to support Control+Up, Control+Down, and Center for my
   84 key keyboard at home.  I also rewrote the getkey() function (bottom of
   main.c), again, to use the extended interrupt 16 functions.  getkey() now
   checks for 101 keyboards and uses the extended functions.   Although I was
   fully aware of the extended interrupt 16 functions, I wanted to hold off
   using those functions until I could simulate them on older machines/
   keyboards.

   For those who don't have access to an assembler and who want to compile
   tde, it won't hurt anything to leave the simulate_enh_kbd function out.
   The simulated extended codes will not be available on older machines, which
   is no big deal.

9-10-91  utils.c

   function:  centerwindow( )

   Wrote a new function for the center key (5 on key pad).  Very helpful when
   you want to go to the middle of the screen and split the window.  There
   are actually two functions in that routine 1) center the cursor in the
   current window and 2) center the current line in the current window.

9-12-91  utils.c  window.c

   function:  show_window_header( )

   Added an indicator to let users know which file a window is opened to.
   Cleaned up some of the inconvenient features in the window commands.
   Changed the lite bar at the bottom of the screen to let the user know how
   many files and windows are open.

9-13-91  main.c

   Watched one of my users try to "break" tde in a Windows 386 real mode window.
   The system seemed to have less memory after editing a file with tde.
   Damn, I forgot to deallocate the memory buffer used for editing all files.
   Deallocate all memory upon termination of the program.

9-14-91  utils.c

   function:  horizontal_screen_right(),  horizontal_screen_left()

   Added a couple of functions to do horizontal page left and right.  Assigned
   Alt+Grey left and Alt+Grey right to those functions.  Since my fingers are
   used to cursor movement with the cursor keys, seems to make sense to put
   these functions there (^Grey - and ^Grey + on 83/84 key keyboards).

9-16-91  utils.c

   function:  show_eof( )

   Tired of guessing where the eof is?  Wrote this function to display the
   eof so users (and me) won't get confused when editing near the eof.

   Thanks to Leslie Martin, Portland, OR, USA, for suggesting this feature.
   I think all users will appreciate this function.

9-18-91  block.c

   I improved the box operations so much they don't work properly.  Fixed
   all the box block improvements.  Line blocks were not affected - they use
   a different algorithm.

9-19-91  all files

   Added a few register variables to improve execution speed & reduce code size.

9-21-91  ed.c

   function:  command()  no longer exists

   Now that most functions seem stable (for the time being), change the big
   switch statement that calls the editor functions to an array of pointers
   to functions.  It saves space and is faster than the switch statement.
   We know what function to call as soon a key is pressed.  No need for tests,
   just use the key code as an index into the array of functions.

9-24-91  all files

   Redefine pointers and function prototypes as needed so tde may be compiled
   with the SMALL memory model.  Use the model independent functions when
   working with the text buffer pointers.  Steal the screen buffer and use it
   to buffer file I/O because there are no model independent fwrite() and
   fread() library functions.  The screen buffer is only used in get_help(),
   so the buffer is just taking up space most of the time.

9-26-91  ed.c  utils.c

   functions:  undo() and load_undo_buffer()

   Added a simple undo function.  Room for UNDO_MAX most recently deleted
   lines.  Implement a simple stack procedure to save the lines.  When the
   stack overflows, just dump the oldest line and add the new one.  Assign
   this function to ALT+Y.  Because I'm used to deleting lines with Control+Y,
   it should be easy remember ALT+Y to do the reverse.

   A more sophisticated undo algorithm with a larger buffer could have been
   implemented, but if I really mess up a file  -  I might as well just quit
   and start over.

10-2-91  findrep.c

   function:  do_replace( )

   Added net changes when doing a replace to some cursors twice.   Let
   addorsub_all_cursors( ) handle all cursor adjustments.

10-4-91  ed.c

   functions:  beg_next_line( ),  next_line( )

   Added two new functions for the Enter key.  They are assigned to Shift+Enter
   and Control+Enter.  These functions were added to give the user a choice of
   functions if the user wants to redefine the Enter key.

10-5-91  tdecfg.exe

   Finally finished a configuration utility to let users redefine 184 various
   function keys.  Combined it with the tdecolor so there will be only one
   easy to use configuration utility.

10-5-91  tde, version 1.2

   All planned changes and additions completed for this version.  As a matter
   of coincidence, I finished this version of tde around 5:30 pm as the
   Atlanta Braves win the NL West pennant.  Date this version 10-5-91 and
   release all source code.  Well, I guess I'll have to wait until spring
   training begins to make any additions to tde unless I learn how to program
   without watching the Braves on TBS while drinking lots of beer.