virtualx-engine/core/templates/search_array.h

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/*  search_array.h                                                        */
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#ifndef SEARCH_ARRAY_H
#define SEARCH_ARRAY_H

#include <core/templates/sort_array.h>

template <class T, class Comparator = _DefaultComparator<T>>
class SearchArray {
public:
	Comparator compare;

	inline int64_t bisect(const T *p_array, int64_t p_len, const T &p_value, bool p_before) const {
		int64_t lo = 0;
		int64_t hi = p_len;
		if (p_before) {
			while (lo < hi) {
				const int64_t mid = (lo + hi) / 2;
				if (compare(p_array[mid], p_value)) {
					lo = mid + 1;
				} else {
					hi = mid;
				}
			}
		} else {
			while (lo < hi) {
				const int64_t mid = (lo + hi) / 2;
				if (compare(p_value, p_array[mid])) {
					hi = mid;
				} else {
					lo = mid + 1;
				}
			}
		}
		return lo;
	}
};

#endif // SEARCH_ARRAY_H