textsearch: fix Boyer-Moore text search bug
The current logic has a bug which cannot find matching pattern, if the
pattern is matched from the first character of target string.
for example:
pattern=abc, string=abcdefg
pattern=a, string=abcdefg
Searching algorithm should return 0 for those things.
Signed-off-by: Joonwoo Park <joonwpark81@xxxxxxxxx>
Signed-off-by: Patrick McHardy <kaber@xxxxxxxxx>
---
commit cf07ecdeb187d567890ade083f0c1fa298085dee
tree 6a7cf5c6bdc80c75ec843d8ee44cd98039ca6fd7
parent 5c61a61f0df27eba716646da0b7371bf49f13d89
author Joonwoo Park <joonwpark81@xxxxxxxxx> Mon, 30 Jun 2008 17:40:34 +0200
committer Patrick McHardy <kaber@xxxxxxxxx> Mon, 30 Jun 2008 17:40:34 +0200
lib/ts_bm.c | 2 +-
1 files changed, 1 insertions(+), 1 deletions(-)
diff --git a/lib/ts_bm.c b/lib/ts_bm.c
index d90822c..4a7fce7 100644
--- a/lib/ts_bm.c
+++ b/lib/ts_bm.c
@@ -63,7 +63,7 @@ static unsigned int bm_find(struct ts_config *conf, struct ts_state *state)
struct ts_bm *bm = ts_config_priv(conf);
unsigned int i, text_len, consumed = state->offset;
const u8 *text;
- int shift = bm->patlen, bs;
+ int shift = bm->patlen - 1, bs;
for (;;) {
text_len = conf->get_next_block(consumed, &text, conf, state);
--
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