bin/41136: \<word search doesn't work in vi

[marcotte%panix.com@localhost]

>Number:         41136
>Category:       bin
>Synopsis:       \<word search doesn't work in vi
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    bin-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Sat Apr 04 00:15:00 +0000 2009
>Originator:     Brian Marcotte
>Release:        5.0 RC3
>Organization:
Panix
>Environment:
NetBSD panix2.panix.com 5.0_RC3 NetBSD 5.0_RC3 (PANIX-XEN3U-USER) #0: Mon Mar 
23 00:30:15 EDT 2009  
root%juggler.panix.com@localhost:/misc3/obj/misc2/devel/netbsd/5.0-RC3/src/sys/arch/i386/compile/PANIX-XEN3U-USER
 i386

>Description:
\<word (beginning of word) search doesn't work in vi. It seems to ignore the \<.

word\> (end-of word) DOES work though.

>How-To-Repeat:
echo "aaaaa aaaaa aaa" > somefile
vi somefile

When in vi, search for \<aaa
It should bring you to the beginning of one of those words, but instead will go 
to any set of "aaa".

>Fix:
In src/dist/nvi/regex/regex2.h, OUT is now defined as WEOF which is -1.

Later in src/dist/nvi/regex/engine.c, OUT is used as a base to define BOL, EOL, 
BOW, etc. The important part is that BOL=OUT+1 (or 0).

In a couple different functions, flagch is initialized to 0 probably assuming 
none BOL, EOL, etc. could ever equal 0.

Presumably, OUT needs to be defined to something outside the normal character 
range.