README revision 1.2 
1ed is a POSIX-compliant line editor.  It should work with any regular
2expression package that conforms to the POSIX interface standard, such as
3GNU regex(3).
4
5The following compiler directives are recognized:
6GNU_REGEX	- use with GNU regex(3)
7DES		- use to add encryption support (requires crypt(3))
8NO_REALLOC_NULL	- use if realloc(3) does not accept a NULL pointer
9
10The file `POSIX' describes extensions to and deviations from the POSIX
11standard.
12
13The ./test directory contains regression tests for ed. The README
14file in that directory explains how to run these.
15
16For a description of the ed algorithm, see Kernighan and Plauger's book
17"Software Tools in Pascal," Addison-Wesley, 1981.
18