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lvm2/lib/regex/matcher.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.
2001-10-19 18:36:57 +04:00
/*
* Copyright (C) 2001 Sistina Software (UK) Limited.
*
* This file is released under the GPL.
*/
#ifndef _LVM_MATCHER_H
#define _LVM_MATCHER_H
#include "pool.h"
struct matcher;
struct matcher *matcher_create(struct pool *mem,
const char **patterns, int num);
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.
2001-10-19 22:20:37 +04:00
int matcher_run(struct matcher *m, const char *begin);
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.
2001-10-19 18:36:57 +04:00
#endif
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