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/* SPDX-License-Identifier: MIT */
/* Copyright © 2022-present Max Bachmann */
#pragma once
#include "Indel.hpp"
namespace rapidfuzz_reference {
template <typename InputIt1, typename InputIt2>
double ratio(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2, double score_cutoff = 0.0)
{
return indel_similarity(first1, last1, first2, last2, score_cutoff / 100.0) * 100;
}
template <typename Sentence1, typename Sentence2>
double ratio(const Sentence1& s1, const Sentence2& s2, double score_cutoff = 0.0)
{
return indel_similarity(s1, s2, score_cutoff / 100.0) * 100;
}
template <typename InputIt1, typename InputIt2>
double partial_ratio_impl(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2,
double score_cutoff = 0.0)
{
size_t len1 = static_cast<size_t>(std::distance(first1, last1));
size_t len2 = static_cast<size_t>(std::distance(first2, last2));
if (len1 == 0 && len2 == 0) return 100.0;
if (len1 == 0 || len2 == 0) return 0.0;
if (len1 > len2) return partial_ratio_impl(first2, last2, first1, last1, score_cutoff);
double res = 0.0;
for (ptrdiff_t i = -1 * (ptrdiff_t)len1; i < (ptrdiff_t)len2; i++) {
ptrdiff_t start = std::max(ptrdiff_t(0), i);
ptrdiff_t end = std::min(ptrdiff_t(len2), i + ptrdiff_t(len1));
InputIt2 first2_ = first2 + start;
InputIt2 last2_ = first2 + end;
res = std::max(res, ratio(first1, last1, first2_, last2_, score_cutoff));
}
return res;
}
template <typename InputIt1, typename InputIt2>
double partial_ratio(InputIt1 first1, InputIt1 last1, InputIt2 first2, InputIt2 last2,
double score_cutoff = 0.0)
{
size_t len1 = static_cast<size_t>(std::distance(first1, last1));
size_t len2 = static_cast<size_t>(std::distance(first2, last2));
if (len1 != len2) return partial_ratio_impl(first1, last1, first2, last2, score_cutoff);
return std::max(partial_ratio_impl(first1, last1, first2, last2, score_cutoff),
partial_ratio_impl(first2, last2, first1, last1, score_cutoff));
}
template <typename Sentence1, typename Sentence2>
double partial_ratio(const Sentence1& s1, const Sentence2& s2, double score_cutoff = 0.0)
{
return partial_ratio(std::begin(s1), std::end(s1), std::begin(s2), std::end(s2), score_cutoff);
}
} // namespace rapidfuzz_reference
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