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Adding support for compiling approximate matching patterns

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Adds new "edit_distance" extparam
This commit is contained in:
Anatoly Burakov
2017-02-10 15:37:35 +00:00
committed by Matthew Barr
parent 60fc975c81
commit 2de6706df2
16 changed files with 804 additions and 28 deletions
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12
src/hs_compile.h
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@@ -1,5 +1,5 @@
/*
* Copyright (c) 2015-2016, Intel Corporation
* Copyright (c) 2015-2017, Intel Corporation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
@@ -241,6 +241,13 @@ typedef struct hs_expr_ext {
* @ref HS_EXT_FLAG_MIN_LENGTH flag in the hs_expr_ext::flags field.
*/
unsigned long long min_length;
/**
* Allow patterns to approximately match within this edit distance. To use
* this parameter, set the @ref HS_EXT_FLAG_EDIT_DISTANCE flag in the
* hs_expr_ext::flags field.
*/
unsigned edit_distance;
} hs_expr_ext_t;
/**
@@ -261,6 +268,9 @@ typedef struct hs_expr_ext {
/** Flag indicating that the hs_expr_ext::min_length field is used. */
#define HS_EXT_FLAG_MIN_LENGTH 4ULL
/** Flag indicating that the hs_expr_ext::edit_distance field is used. */
#define HS_EXT_FLAG_EDIT_DISTANCE 8ULL
/** @} */
/**