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Tom Lane c6aae3042b Simplify and document regex library's compact-NFA representation. 
The previous coding abused the first element of a cNFA state's arcs list
to hold a per-state flag bit, which was confusing, undocumented, and not
even particularly efficient.  Get rid of that in favor of a separate
"stflags" vector.  Since there's only one bit in use, I chose to allocate a
char per state; we could possibly replace this with a bitmap at some point,
but that would make accesses a little slower.  It's already about 8X
smaller than before, so let's not get overly tense.

Also document the representation better than it was before, which is to say
not at all.

This patch is a byproduct of investigations towards extracting a "fixed
prefix" string from the compact-NFA representation of regex patterns.
Might need to back-patch it if we decide to back-patch that fix, but for
now it's just code cleanup so I'll just put it in HEAD.
2012-07-07 17:39:50 -04:00
..
access Tighten up includes in sinvaladt.h, twophase.h, proc.h 2012-06-25 18:40:40 -04:00
bootstrap Unify calling conventions for postgres/postmaster sub-main functions 2012-06-25 21:30:12 +03:00
catalog Replace int2/int4 in C code with int16/int32 2012-06-25 01:51:46 +03:00
commands Have REASSIGN OWNED work on extensions, too 2012-07-03 15:09:59 -04:00
datatype Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
executor Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
foreign Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
lib Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
libpq Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
mb Add wchar -> mb conversion routines. 2012-07-04 17:10:10 -04:00
nodes Fix memory leak in ARRAY(SELECT ...) subqueries. 2012-06-21 17:27:19 -04:00
optimizer Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
parser Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
port Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
portability Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
postmaster Unify calling conventions for postgres/postmaster sub-main functions 2012-06-25 21:30:12 +03:00
regex Simplify and document regex library's compact-NFA representation. 2012-07-07 17:39:50 -04:00
replication Make walsender more responsive. 2012-07-02 09:41:01 -04:00
rewrite Prevent CREATE TABLE LIKE/INHERITS from (mis) copying whole-row Vars. 2012-06-30 16:45:14 -04:00
snowball Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
storage When LWLOCK_STATS is defined, count spindelays. 2012-06-26 16:06:07 -04:00
tcop Unify calling conventions for postgres/postmaster sub-main functions 2012-06-25 21:30:12 +03:00
tsearch Replace int2/int4 in C code with int16/int32 2012-06-25 01:51:46 +03:00
utils Unify calling conventions for postgres/postmaster sub-main functions 2012-06-25 21:30:12 +03:00
.gitignore Convert cvsignore to gitignore, and add .gitignore for build targets. 2010-09-22 12:57:04 +02:00
c.h Replace int2/int4 in C code with int16/int32 2012-06-25 01:51:46 +03:00
fmgr.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
funcapi.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
getaddrinfo.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
getopt_long.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
Makefile Fix server header file installation with vpath builds 2011-11-10 20:52:54 +02:00
miscadmin.h Do stack-depth checking in all postmaster children. 2012-04-08 19:07:55 +03:00
pg_config.h.in Remove support for using wait3() in place of waitpid(). 2012-07-05 14:00:40 -04:00
pg_config.h.win32 Remove support for using wait3() in place of waitpid(). 2012-07-05 14:00:40 -04:00
pg_config_manual.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
pg_trace.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
pgstat.h Unify calling conventions for postgres/postmaster sub-main functions 2012-06-25 21:30:12 +03:00
pgtime.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
port.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
postgres.h Run pgindent on 9.2 source tree in preparation for first 9.3 2012-06-10 15:20:04 -04:00
postgres_ext.h Remove cvs keywords from all files. 2010-09-20 22:08:53 +02:00
postgres_fe.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
rusagestub.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00
windowapi.h Update copyright notices for year 2012. 2012-01-01 18:01:58 -05:00