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Merge pull request #52850 from mashumafi/vector-bsearch

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Rémi Verschelde 2021-10-01 07:52:51 +02:00 • committed by GitHub
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14 changed files with 182 additions and 30 deletions
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67
core/templates/search_array.h Normal file
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@ -0,0 +1,67 @@
/*************************************************************************/
/* search_array.h */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2021 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2021 Godot Engine contributors (cf. AUTHORS.md). */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#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 int bisect(const T *p_array, int p_len, const T &p_value, bool p_before) const {
int lo = 0;
int hi = p_len;
if (p_before) {
while (lo < hi) {
const int mid = (lo + hi) / 2;
if (compare(p_array[mid], p_value)) {
lo = mid + 1;
} else {
hi = mid;
}
}
} else {
while (lo < hi) {
const int mid = (lo + hi) / 2;
if (compare(p_value, p_array[mid])) {
hi = mid;
} else {
lo = mid + 1;
}
}
}
return lo;
}
};
#endif // SEARCH_ARRAY_H

6
core/templates/vector.h
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@ -40,6 +40,7 @@
#include "core/error/error_macros.h"
#include "core/os/memory.h"
#include "core/templates/cowdata.h"
#include "core/templates/search_array.h"
#include "core/templates/sort_array.h"
template <class T>
@ -112,6 +113,11 @@ public:
sort_custom<_DefaultComparator<T>>();
}
int bsearch(const T &p_value, bool p_before) {
SearchArray<T> search;
return search.bisect(ptrw(), size(), p_value, p_before);
}
Vector<T> duplicate() {
return *this;
}