NAME

edin - in-core text editor


SYNOPSIS

edin [file]


DESCRIPTION

Edin is a simple version of the text editor which keeps the entire
file in a buffer in core (as opposed to storing it on a scratch
file).
It thus can handle only small files.
It is included only as a temporary editor to use while
implementing the full-fledged version of ed.


FILES

None


SEE ALSO

ed (or edit), sedit, find, ch

Kernighan and Plauger's "Software Tools", pages 163-208




DIAGNOSTICS

file size exceeded


printed whenever the maximum number of characters allowed has been
exceeded.
The size of the in-core buffer is determined by the MAXBUF
definition in the source code.


The error message "?" is printed whenever an edit command
fails or is not understood.


AUTHORS

Straight from "Software Tools", with few changes and
very little testing.


CHANGES

This editor is basically the one provided in the book
except that it has been taught to read both upper and
lower case commands and it prints a message when the
file is too big to fit in the buffer.


BUGS/DEFICIENCIES

Who knows....




COMMAND SUMMARY




Addresses:

 17      a decimal number
 .       the "current" line
 $       the last line of the file
 /pat/   search forward for line containing pat
 \pat\   search backward for line containing pat
 line+n  n lines forward from line
 line-n  n lines backward from line


Defaults:

 (.)     use current line
 (.+1)   use the next line
 (.,.)   use current line for both line numbers
 (1,$)   use all lines


Commands:

 (.)     a               append text after line
                         (text follows)
 (.,.)   c               change text (text follows)
 (.,.)   d               delete text
         e file          discard current text, enter file,
                         remember file name
         f               print file name
         f file          remember file name
 (.)     i               insert text before line (text follows)
 (.,.)   m line3         move text to after line3
 (.,.)   p               print text (can be appended to other commands)
         q               quit
 (.)     r file          read file, appending after line
 (.,.)   s/pat/new/gp    substitute new for leftmost pat
                         (g implies all occurrences)
 (1,$)   w file          write file, leave current text unaltered
                         (if "file" isn't given, write to current
                         filename)
 (.)     =p              print line number, current line
 (.+1)   <CR>            print next line
 (1,$)   g/pat/command   do command on lines containing pat
                         (except a, c, i, q commands)
 (1,$)   x/pat/command   do command on lines not containing pat
                         (except a, c, i, q commands)