diff options
| -rw-r--r-- | src/libutil/shingles.c | 15 | ||||
| -rw-r--r-- | src/libutil/shingles.h | 10 |
2 files changed, 25 insertions, 0 deletions
diff --git a/src/libutil/shingles.c b/src/libutil/shingles.c index 2307a318c..653fa5356 100644 --- a/src/libutil/shingles.c +++ b/src/libutil/shingles.c @@ -135,3 +135,18 @@ rspamd_shingles_default_filter (guint64 *input, gsize count, return minimal; } + + +gdouble rspamd_shingles_compare (const struct rspamd_shingle *a, + const struct rspamd_shingle *b) +{ + gint i, common = 0; + + for (i = 0; i < RSPAMD_SHINGLE_SIZE; i ++) { + if (a->hashes[i] == b->hashes[i]) { + common ++; + } + } + + return (gdouble)common / 84.0; +} diff --git a/src/libutil/shingles.h b/src/libutil/shingles.h index 571199992..39e9cf38d 100644 --- a/src/libutil/shingles.h +++ b/src/libutil/shingles.h @@ -58,6 +58,16 @@ struct rspamd_shingle* rspamd_shingles_generate (GArray *input, gpointer filterd); /** + * Compares two shingles and return result as a floating point value - 1.0 + * for completely similar shingles and 0.0 for completely different ones + * @param a + * @param b + * @return + */ +gdouble rspamd_shingles_compare (const struct rspamd_shingle *a, + const struct rspamd_shingle *b); + +/** * Default filtering function */ guint64 rspamd_shingles_default_filter (guint64 *input, gsize count, |