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lvm2/lib/regex/ttree.h

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o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
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/*
Update copyright notices.
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* Copyright (C) 2001-2004 Sistina Software, Inc. All rights reserved.
* Copyright (C) 2004 Red Hat, Inc. All rights reserved.
o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
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*
Update copyright notices.
2004-03-30 23:35:44 +04:00
* This file is part of LVM2.
*
* This copyrighted material is made available to anyone wishing to use,
* modify, copy, or redistribute it subject to the terms and conditions
* of the GNU General Public License v.2.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
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*/
#ifndef _LVM_TTREE_H
#define _LVM_TTREE_H
struct ttree;
Use hash, bitset, malloc, pool from libdevmapper.
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struct ttree *ttree_create(struct dm_pool *mem, unsigned int klen);
o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
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void *ttree_lookup(struct ttree *tt, unsigned *key);
o Filter for the dev cache that takes values from config file: devices { # first match is final, eg. /dev/ide/cdrom # get's rejected due to the first pattern filter=["r/cdrom/", # don't touch the music ! "a/hd[a-d][0-9]+/", "a/ide/", "a/sd/", "a/md/", "a|loop/[0-9]+|", # accept devfs style loop back "r/loop/", # and reject old style "a/dasd/", "a/dac960/", "a/nbd/", "a/ida/", "a/cciss/", "a/ubd/", "r/.*/"] # reject all others } Alasdair this is ready to roll into the tools now.
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int ttree_insert(struct ttree *tt, unsigned *key, void *data);
o First pass at the regex code. lib/regex/matcher takes an array of regex's and builds a *very* efficient engine that will tell you which regex a string matches with only a single pass through the string. To be used in the config file when specifying devices. o Anchor's aren't supported yet (^ and $) but that won't take long. o Also when we get some realistic config files we may want to consider adding an extra level of indirection to the dfa state in order to compress the table. It all depends on how large typical tables get.
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#endif
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