P1003.2b/D9 says:
If the end of the input is reached, the n command shall branch to the end
of the script and quit without starting a new cycle

change the replacement algoricthm to only replace when:
(1) the previous replacement was for an empty match, or
(2) the current replacement is for a non-empty match.
this makes empty RE's work as the

change the replacement algoricthm to only replace when:
(1) the previous replacement was for an empty match, or
(2) the current replacement is for a non-empty match.
this makes empty RE's work as they did historically
From: "Chris G. Demetriou" <cgd@sun-lamp.cs.berkeley.edu>

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The `D' command in sed was leaving junk at the end of the pattern space.
From: Charles Hannum <mycroft@sun-lamp.cs.berkeley.edu>

update copyright notice

sed -e 's/$/ \\/g' /etc/passwd loops forever
break out of the "g" loop when the regular expression being substituted
is of zero length
From: Diomidis Spinellis <dspin@leon.nrcps.ariadne-t.gr>

4.4BSD snapshot (revision 8.1); add 1993 to copyright

Strnchr() -> memchr().

fix REs over completely empty spaces
(test case: echo '' | sed 'x;s/^.*/foo/')

make sed work on 8-bit objects
TK checking in for Elan Amir

Initial version that will work with binary files.

Fixed bug in cspace -- precdence of == is less that '+'.

"echo '1+1' | sed -f /usr/src/usr.bin/sed/math.sed" drops core
from Donn at BSDI

branch should succeed if any substitution has succeeded, not just the
last one; from Diomidis Spinellis <dds@doc.ic.ac.uk>

unneeded set

don't access entries multiple times; from Diomidis

re_off is a size_t, cspace is an external function

MUST copy data from stdio buffer, change interface to mf_fgets;
this simplifies the interface to cspace, so clean that up, too;
make match (pmatch) a single global structure, cleaning up regexec_e();

MUST copy data from stdio buffer, change interface to mf_fgets;
this simplifies the interface to cspace, so clean that up, too;
make match (pmatch) a single global structure, cleaning up regexec_e();
fix default RE calculation for re_nsub > maxbref; fix default RE bugs

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let's not be tricky...

don't close fd's twice.

make empty RE's work, some minor cleanups, too

fix the 'd' and 'D' flags for the new "pd" variable

date and time created 92/08/23 18:26:16 by bostic