diff options
| author | Thomas Graf | 2005-06-23 20:59:16 -0700 |
|---|---|---|
| committer | David S. Miller | 2005-06-23 20:59:16 -0700 |
| commit | 6408f79cce401e1bfecf923e7156f84f96e021e3 (patch) | |
| tree | 203624ffacf60d364293adc47d2f59f6ba81dd35 /lib/Kconfig | |
| parent | df3fb93ad9ec0b20c785c0ad82d42d159a1af272 (diff) | |
[LIB]: Naive finite state machine based textsearch
A finite state machine consists of n states (struct ts_fsm_token)
representing the pattern as a finite automation. The data is read
sequentially on a octet basis. Every state token specifies the number
of recurrences and the type of value accepted which can be either a
specific character or ctype based set of characters. The available
type of recurrences include 1, (0|1), [0 n], and [1 n].
The algorithm differs between strict/non-strict mode specyfing
whether the pattern has to start at the first octect. Strict mode
is enabled by default and can be disabled by inserting
TS_FSM_HEAD_IGNORE as the first token in the chain.
The runtime performance of the algorithm should be around O(n),
however while in strict mode the average runtime can be better.
Signed-off-by: Thomas Graf <tgraf@suug.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'lib/Kconfig')
| -rw-r--r-- | lib/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/lib/Kconfig b/lib/Kconfig index 16b8fa2175e4..455833a9e31a 100644 --- a/lib/Kconfig +++ b/lib/Kconfig @@ -80,4 +80,15 @@ config TEXTSEARCH_KMP To compile this code as a module, choose M here: the module will be called ts_kmp. +config TEXTSEARCH_FSM + depends on TEXTSEARCH + tristate "Finite state machine" + help + Say Y here if you want to be able to search text using a + naive finite state machine approach implementing a subset + of regular expressions. + + To compile this code as a module, choose M here: the + module will be called ts_fsm. + endmenu |