TECO IN C FOR FREE


                           645 Ohio Ave, # 30                        Long Beach, Ca. 90814
                       Long Beach, Ca. 90814
 
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  Teco  User's Guide, DEC order number DEC-11-UTECA-B-D.  It was written
using the Guide as a specification.
DEC-11-UTECA-B-D.  It was written

ing the Guide as a specification.







  
           Undocumented features of TECO-11 and TECO-C



  
   1.  8192 bit in ET flag causes ' character to be ESCAPE
  
   2.  Q-registers named ".x" are local to the current macro level.
  
   3.  HELP

 
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                        TECO-C vs. TECO-11
  
                   in rough order of importance



  
              TECO-C                          TECO-11

          pay for (maybe bugs)
u         exhaustively tested

      pay for (maybe bugs)
          more soon                       (until VMS v5.0)
 mode

      more soon                       (until VMS v5.0)
          and no /SCROLL qualifier        supports /SCROLL
o and

      and no /SCROLL qualifier        supports /SCROLL
          q-registers
y buffer and       100k total bytes

      q-registers
  
      faster                          slower
          not parsed with macro           parsed with a TECO macro

      not parsed with macro           parsed with a TECO macro
  
      32-bit numeric values           16-bit numeric values
                                          want LF and BS immediate comm
                                      want LF and BS immediate commands
          q-registers (E% and EQ)
       not implemented

      q-registers (E% and EQ)
          HELP file,  interactive         move around help tree


      HELP file,  interactive         move around help tree
          help libraries
 system         settable HELP library

      help libraries
  
      EO returns 100                  EO returns 39, 40, etc.
  
      correct case sensitivity        thinks { is same as [,  etc.
  
      no -P, -N, -Y                   has -P, -N, -Y
  
      no filename switches            has them,  like /CR and /FT

                      other very minor differences
 
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                        TECO-C portability
  
   1.  283 files, 32 are system-dependent
           CPM-68k
r VAX/VMS, almost runs under XENIX, once  ran  under

       CPM-68k
           system-dependent files.
conditionally   compiled   code   in

       system-dependent files.
  
   4.  Almost no terminal dependencies.
  
   5.  Uses RMS under VMS, fopen/fclose/fgets etc.  under XENIX.
           and to C code under XENIX.
which maps to OTS$MOVC3 under VMS

       and to C code under XENIX.
           dependent  upon the system.  For instance, RMS error messages
         are reported from VAX code.
For instance, RMS error messages

       are reported from VAX code.
           accessing command-line arguments.
nd  C's  standard  way  of

       accessing command-line arguments.

 
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                     Implementation of TECO-C

  
   1.  Edit buffer gap scheme instead of a contiguous edit buffer.
           command character.
by indexing into a jump table  using  the

       command character.
  
   3.  Memory is managed with calloc/realloc/free calls.
  
   4.  One function per file.
  
   5.  Function names are 6 characters or less.
           little parameter passing.
o global variables:  there is very

       little parameter passing.
  
   7.  System-dependent function names start with a "Z".
           entry/exit  text  as  TECO-C runs.  Can be controlled with ^P
         command and is conditionally compiled.
be controlled with ^P

       command and is conditionally compiled.
           written to compare TECO-C's behavior to TECO-11's.
hey  were

       written to compare TECO-C's behavior to TECO-11's.

 
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                 Helpful files in TECO-C save set

           used from TECO-11.
than TECO-11's help library, and  can  be

       used from TECO-11.
  
   2.  CHANGE.TEC is like VMS SEARCH, but changes the string.
           of TECO-C commands.
ut COMMANDS.TXT contains a "wall  chart"

       of TECO-C commands.
           algorithms and data structures used in TECO-C.
h   describes

       algorithms and data structures used in TECO-C.
           ideas.
.TXT contains desciptions  of  known  bugs  and  some

       ideas.
           *.TEC.  They are undocumented.
  be  found  in  files  named

       *.TEC.  They are undocumented.

 
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                         Future of TECO-C

           it  like  EDT or TPU means depending on a DEC-style keyboard.
         Making it like EMACS is REALLY re-inventing the wheel.
oard.

       Making it like EMACS is REALLY re-inventing the wheel.
           VAX-dependent.   If  I  use curses, then it's UNIX-dependent.
         If I write my own, then it will support  a  small  number  of
         terminals.
y own, then it will support  a  small  number  of

       terminals.
           possible.
cements that cause several "flavors" to exist,  if

       possible.
           submitted  to the DECUS Software Library.  Other TECO-related
         elements of the  library  will  be  combined  into  a  single
         Library entry.
 library  will  be  combined  into  a  single

       Library entry.