README revision 1.3 
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
9HAVE_SIGSETJMP	- use if sigsetjmp/siglongjmp are supported
10
11The file `POSIX' describes extensions to and deviations from the POSIX
12standard.
13
14The ./test directory contains regression tests for ed. The README
15file in that directory explains how to run these.
16
17For a description of the ed algorithm, see Kernighan and Plauger's book
18"Software Tools in Pascal," Addison-Wesley, 1981.
19