#################
#  EDIT MANUAL  #
#################

PER BRINCH HANSEN
14 AUGUST 1975

PURPOSE:
  EDITS AN ASCII FILE INPUT FROM A SOURCE MEDIUM AND OUTPUTS IT ON
A DESTINATION MEDIUM.
  EDITING COMMANDS ARE INPUT FROM THE CONSOLE. THERE ARE ONLY TWO KINDS OF
COMMANDS: DELETE ONE OR MORE LINES, AND COMPLETE THE COPYING OF THE
SOURCE FILE. ANYTHING ELSE INPUT FROM THE CONSOLE IS APPENDED TO THE
DESTINATION FILE AT ITS CURRENT POSITION. INITIALLY, THE DESTINATION FILE
IS EMPTY.
  THE EDITOR IS ONLY ABLE TO DELETE AND INSERT COMPLETE LINES
IDENTIFIED BY LINE NUMBERS.

CALL:
  EDIT(FILE: IDENTIFIER)

  EDIT(SOURCE, DESTINATION: IDENTIFIER)

  THE COMMAND: EDIT(F) IS EQUIVALENT TO: EDIT(F, F).
  THE SOURCE CAN EITHER BE AN ASCII DISK FILE OR A SEQUENTIAL PROGRAM
THAT INPUTS AN ASCII FILE.
  THE DESTINATION FILE CAN BE AN ASCII DISK FILE, A SEQUENTIAL PROGRAM
THAT OUTPUTS AN ASCII FILE, OR A NON-EXISTING FILE. IN THE FIRST CASE,
THE EXISTING FILE (WHICH MUST BE UNPROTECTED) IS REPLACED BY A NEW ONE
OF THE SAME NAME. IN THE LAST CASE, A NEW FILE IS CREATED AND STORED ON DISK.
IN BOTH CASES, THE RESULTING DISK FILE WILL BE AN UNPROTECTED ASCII
FILE.

DELETE COMMAND:
  DEL(LINENO: INTEGER)

  DEL(FIRSTLINE, LASTLINE: INTEGER)

  DEL(L) IS EQUIVALENT TO DEL(L, L).
  COPIES THE SOURCE FILE FROM THE CURRENT LINE NUMBER UP TO THE FIRST LINE - 1,
AND DELETES THE FIRST LINE THROUGH THE LAST LINE INCLUSIVE. THE SOURCE
LINES ARE NUMBERED 1, 2, 3, ...

COMPLETE COMMAND:
  #
  COPIES THE SOURCE FILE FROM THE CURRENT LINE UP TO AND INCLUDING THE
FINAL EM CHARACTER.

INSERT COMMAND:
  ANY CONSOLE LINE THAT IS NEITHER A DELETE NOR A COMPLETE COMMAND IS
IS APPENDED TO THE LAST LINE OUTPUT TO THE DESTINATION FILE.

REPLACE COMMAND:
  SOURCE LINES CAN BE REPLACED BY DELETION FOLLOWED BY INSERTION.

ERROR MESSAGES:

LINE ALREADY PASSED
  THE FIRST LINE OF A DELETE COMMAND HAS ALREADY BEEN PASSED IN THE
SOURCE FILE.

LINE NUMBERS ILLEGAL
  THE FIRST LINE NUMBER IN A DELETE COMMAND IS GREATER THAN THE LAST
LINE NUMBER.

DESTINATION FILE LOST
  THE FILE PROGRAM CALLED BY EDIT FAILED TO CREATE OR REPLACE THE
DESTINATION FILE DUE TO RUN-TIME ERRORS.
E COMMAND IS
IS APPENDED TO THE LAST LINE OUTPUT TO THE DESTINATION FILE.

REPLACE COMMAND:
  SOURCE LINES CAN BE REPLACED BY DELETION FOLLOWED BY INSERTION.

ERROR MESSAGES:

LINE ALREADY PASSED
  THE FIRST LINE OF A DELETE COMMAND HAS ALREADY BEEN PASSED IN THE
SOURCE FILE.

LINE NUMBERS ILLEGAL
  THE FIRST LINE NUMBER IN A DELETE COMMAND IS GREATER THAN THE LAST
LINE NUMBER.

DESTINATION FILE L