# cython: binding=True, infer_types=True
from cpython.object cimport PyObject
from libc.stdint cimport int64_t
from typing import Optional
from ..util import registry
cdef extern from "polyleven.c":
int64_t polyleven(PyObject *o1, PyObject *o2, int64_t k)
cpdef int64_t levenshtein(a: str, b: str, k: Optional[int] = None):
if k is None:
k = -1
return polyleven(<PyObject*>a, <PyObject*>b, k)
cpdef bint levenshtein_compare(input_text: str, pattern_text: str, fuzzy: int = -1):
if fuzzy >= 0:
max_edits = fuzzy
else:
# allow at least two edits (to allow at least one transposition) and up
# to 30% of the pattern string length
max_edits = max(2, round(0.3 * len(pattern_text)))
return levenshtein(input_text, pattern_text, max_edits) <= max_edits
@registry.misc("spacy.levenshtein_compare.v1")
def make_levenshtein_compare():
return levenshtein_compare
