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Add support for Hamming distance approx matching

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This commit is contained in:
Matthew Barr
2017-10-10 15:26:35 +11:00
committed by Xiang Wang
parent 5827bd1c2b
commit 1891f14755
13 changed files with 169 additions and 56 deletions
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10
src/hs_compile.h
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@@ -258,6 +258,13 @@ typedef struct hs_expr_ext {
* hs_expr_ext::flags field.
*/
unsigned edit_distance;
/**
* Allow patterns to approximately match within this Hamming distance. To
* use this parameter, set the @ref HS_EXT_FLAG_HAMMING_DISTANCE flag in the
* hs_expr_ext::flags field.
*/
unsigned hamming_distance;
} hs_expr_ext_t;
/**
@@ -281,6 +288,9 @@ typedef struct hs_expr_ext {
/** Flag indicating that the hs_expr_ext::edit_distance field is used. */
#define HS_EXT_FLAG_EDIT_DISTANCE 8ULL
/** Flag indicating that the hs_expr_ext::hamming_distance field is used. */
#define HS_EXT_FLAG_HAMMING_DISTANCE 16ULL
/** @} */
/**