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freebsd-nq/contrib/libg++/libstdc++/stl/algo.h
Peter Wemm 5acb90c9b6 Import of raw libg++-2.7.2, but in a very cut-down form. There is still 
a small amount of unused stuff (by the bmakefiles to follow), but it
isn't much and seems harmless enough.
1996-10-03 21:35:18 +00:00

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/*
*
* Copyright (c) 1994
* Hewlett-Packard Company
*
* Permission to use, copy, modify, distribute and sell this software
* and its documentation for any purpose is hereby granted without fee,
* provided that the above copyright notice appear in all copies and
* that both that copyright notice and this permission notice appear
* in supporting documentation. Hewlett-Packard Company makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*
*/
#ifndef ALGO_H
#define ALGO_H
#include <stdlib.h>
#ifndef __GNUG__
#include <bool.h>
#endif
#include <pair.h>
#include <iterator.h>
#include <algobase.h>
#include <heap.h>
#include <tempbuf.h>
template <class T>
inline const T& __median(const T& a, const T& b, const T& c) {
if (a < b)
if (b < c)
return b;
else if (a < c)
return c;
else
return a;
else if (a < c)
return a;
else if (b < c)
return c;
else
return b;
}
template <class T, class Compare>
inline const T& __median(const T& a, const T& b, const T& c, Compare comp) {
if (comp(a, b))
if (comp(b, c))
return b;
else if (comp(a, c))
return c;
else
return a;
else if (comp(a, c))
return a;
else if (comp(b, c))
return c;
else
return b;
}
template <class InputIterator, class Function>
Function for_each(InputIterator first, InputIterator last, Function f) {
while (first != last) f(*first++);
return f;
}
template <class InputIterator, class T>
InputIterator find(InputIterator first, InputIterator last, const T& value) {
while (first != last && *first != value) ++first;
return first;
}
template <class InputIterator, class Predicate>
InputIterator find_if(InputIterator first, InputIterator last,
Predicate pred) {
while (first != last && !pred(*first)) ++first;
return first;
}
template <class ForwardIterator>
ForwardIterator adjacent_find(ForwardIterator first, ForwardIterator last) {
if (first == last) return last;
ForwardIterator next = first;
while(++next != last) {
if (*first == *next) return first;
first = next;
}
return last;
}
template <class ForwardIterator, class BinaryPredicate>
ForwardIterator adjacent_find(ForwardIterator first, ForwardIterator last,
BinaryPredicate binary_pred) {
if (first == last) return last;
ForwardIterator next = first;
while(++next != last) {
if (binary_pred(*first, *next)) return first;
first = next;
}
return last;
}
template <class InputIterator, class T, class Size>
void count(InputIterator first, InputIterator last, const T& value,
Size& n) {
while (first != last)
if (*first++ == value) ++n;
}
template <class InputIterator, class Predicate, class Size>
void count_if(InputIterator first, InputIterator last, Predicate pred,
Size& n) {
while (first != last)
if (pred(*first++)) ++n;
}
template <class ForwardIterator1, class ForwardIterator2, class Distance1,
class Distance2>
ForwardIterator1 __search(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2,
Distance1*, Distance2*) {
Distance1 d1 = 0;
distance(first1, last1, d1);
Distance2 d2 = 0;
distance(first2, last2, d2);
if (d1 < d2) return last1;
ForwardIterator1 current1 = first1;
ForwardIterator2 current2 = first2;
while (current2 != last2)
if (*current1++ != *current2++)
if (d1-- == d2)
return last1;
else {
current1 = ++first1;
current2 = first2;
}
return (current2 == last2) ? first1 : last1;
}
template <class ForwardIterator1, class ForwardIterator2>
inline ForwardIterator1 search(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2)
{
return __search(first1, last1, first2, last2, distance_type(first1),
distance_type(first2));
}
template <class ForwardIterator1, class ForwardIterator2,
class BinaryPredicate, class Distance1, class Distance2>
ForwardIterator1 __search(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2,
BinaryPredicate binary_pred, Distance1*, Distance2*) {
Distance1 d1 = 0;
distance(first1, last1, d1);
Distance2 d2 = 0;
distance(first2, last2, d2);
if (d1 < d2) return last1;
ForwardIterator1 current1 = first1;
ForwardIterator2 current2 = first2;
while (current2 != last2)
if (!binary_pred(*current1++, *current2++))
if (d1-- == d2)
return last1;
else {
current1 = ++first1;
current2 = first2;
}
return (current2 == last2) ? first1 : last1;
}
template <class ForwardIterator1, class ForwardIterator2,
class BinaryPredicate>
inline ForwardIterator1 search(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2, ForwardIterator2 last2,
BinaryPredicate binary_pred) {
return __search(first1, last1, first2, last2, binary_pred,
distance_type(first1), distance_type(first2));
}
template <class ForwardIterator1, class ForwardIterator2>
ForwardIterator2 swap_ranges(ForwardIterator1 first1, ForwardIterator1 last1,
ForwardIterator2 first2) {
while (first1 != last1) iter_swap(first1++, first2++);
return first2;
}
template <class InputIterator, class OutputIterator, class UnaryOperation>
OutputIterator transform(InputIterator first, InputIterator last,
OutputIterator result, UnaryOperation op) {
while (first != last) *result++ = op(*first++);
return result;
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class BinaryOperation>
OutputIterator transform(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, OutputIterator result,
BinaryOperation binary_op) {
while (first1 != last1) *result++ = binary_op(*first1++, *first2++);
return result;
}
template <class ForwardIterator, class T>
void replace(ForwardIterator first, ForwardIterator last, const T& old_value,
const T& new_value) {
while (first != last) {
if (*first == old_value) *first = new_value;
++first;
}
}
template <class ForwardIterator, class Predicate, class T>
void replace_if(ForwardIterator first, ForwardIterator last, Predicate pred,
const T& new_value) {
while (first != last) {
if (pred(*first)) *first = new_value;
++first;
}
}
template <class InputIterator, class OutputIterator, class T>
OutputIterator replace_copy(InputIterator first, InputIterator last,
OutputIterator result, const T& old_value,
const T& new_value) {
while (first != last) {
*result++ = *first == old_value ? new_value : *first;
++first;
}
return result;
}
template <class Iterator, class OutputIterator, class Predicate, class T>
OutputIterator replace_copy_if(Iterator first, Iterator last,
OutputIterator result, Predicate pred,
const T& new_value) {
while (first != last) {
*result++ = pred(*first) ? new_value : *first;
++first;
}
return result;
}
template <class ForwardIterator, class Generator>
void generate(ForwardIterator first, ForwardIterator last, Generator gen) {
while (first != last) *first++ = gen();
}
template <class OutputIterator, class Size, class Generator>
OutputIterator generate_n(OutputIterator first, Size n, Generator gen) {
while (n-- > 0) *first++ = gen();
return first;
}
template <class InputIterator, class OutputIterator, class T>
OutputIterator remove_copy(InputIterator first, InputIterator last,
OutputIterator result, const T& value) {
while (first != last) {
if (*first != value) *result++ = *first;
++first;
}
return result;
}
template <class InputIterator, class OutputIterator, class Predicate>
OutputIterator remove_copy_if(InputIterator first, InputIterator last,
OutputIterator result, Predicate pred) {
while (first != last) {
if (!pred(*first)) *result++ = *first;
++first;
}
return result;
}
template <class ForwardIterator, class T>
ForwardIterator remove(ForwardIterator first, ForwardIterator last,
const T& value) {
first = find(first, last, value);
ForwardIterator next = first;
return first == last ? first : remove_copy(++next, last, first, value);
}
template <class ForwardIterator, class Predicate>
ForwardIterator remove_if(ForwardIterator first, ForwardIterator last,
Predicate pred) {
first = find_if(first, last, pred);
ForwardIterator next = first;
return first == last ? first : remove_copy_if(++next, last, first, pred);
}
template <class InputIterator, class ForwardIterator>
ForwardIterator __unique_copy(InputIterator first, InputIterator last,
ForwardIterator result, forward_iterator_tag) {
*result = *first;
while (++first != last)
if (*result != *first) *++result = *first;
return ++result;
}
template <class InputIterator, class BidirectionalIterator>
inline BidirectionalIterator __unique_copy(InputIterator first,
InputIterator last,
BidirectionalIterator result,
bidirectional_iterator_tag) {
return __unique_copy(first, last, result, forward_iterator_tag());
}
template <class InputIterator, class RandomAccessIterator>
inline RandomAccessIterator __unique_copy(InputIterator first,
InputIterator last,
RandomAccessIterator result,
random_access_iterator_tag) {
return __unique_copy(first, last, result, forward_iterator_tag());
}
template <class InputIterator, class OutputIterator, class T>
OutputIterator __unique_copy(InputIterator first, InputIterator last,
OutputIterator result, T*) {
T value = *first;
*result = value;
while (++first != last)
if (value != *first) {
value = *first;
*++result = value;
}
return ++result;
}
template <class InputIterator, class OutputIterator>
inline OutputIterator __unique_copy(InputIterator first, InputIterator last,
OutputIterator result,
output_iterator_tag) {
return __unique_copy(first, last, result, value_type(first));
}
template <class InputIterator, class OutputIterator>
inline OutputIterator unique_copy(InputIterator first, InputIterator last,
OutputIterator result) {
if (first == last) return result;
return __unique_copy(first, last, result, iterator_category(result));
}
template <class InputIterator, class ForwardIterator, class BinaryPredicate>
ForwardIterator __unique_copy(InputIterator first, InputIterator last,
ForwardIterator result,
BinaryPredicate binary_pred,
forward_iterator_tag) {
*result = *first;
while (++first != last)
if (!binary_pred(*result, *first)) *++result = *first;
return ++result;
}
template <class InputIterator, class BidirectionalIterator,
class BinaryPredicate>
inline BidirectionalIterator __unique_copy(InputIterator first,
InputIterator last,
BidirectionalIterator result,
BinaryPredicate binary_pred,
bidirectional_iterator_tag) {
return __unique_copy(first, last, result, binary_pred,
forward_iterator_tag());
}
template <class InputIterator, class RandomAccessIterator,
class BinaryPredicate>
inline RandomAccessIterator __unique_copy(InputIterator first,
InputIterator last,
RandomAccessIterator result,
BinaryPredicate binary_pred,
random_access_iterator_tag) {
return __unique_copy(first, last, result, binary_pred,
forward_iterator_tag());
}
template <class InputIterator, class OutputIterator, class BinaryPredicate,
class T>
OutputIterator __unique_copy(InputIterator first, InputIterator last,
OutputIterator result,
BinaryPredicate binary_pred, T*) {
T value = *first;
*result = value;
while (++first != last)
if (!binary_pred(value, *first)) {
value = *first;
*++result = value;
}
return ++result;
}
template <class InputIterator, class OutputIterator, class BinaryPredicate>
inline OutputIterator __unique_copy(InputIterator first, InputIterator last,
OutputIterator result,
BinaryPredicate binary_pred,
output_iterator_tag) {
return __unique_copy(first, last, result, binary_pred, value_type(first));
}
template <class InputIterator, class OutputIterator, class BinaryPredicate>
inline OutputIterator unique_copy(InputIterator first, InputIterator last,
OutputIterator result,
BinaryPredicate binary_pred) {
if (first == last) return result;
return __unique_copy(first, last, result, binary_pred,
iterator_category(result));
}
template <class ForwardIterator>
ForwardIterator unique(ForwardIterator first, ForwardIterator last) {
first = adjacent_find(first, last);
return unique_copy(first, last, first);
}
template <class ForwardIterator, class BinaryPredicate>
ForwardIterator unique(ForwardIterator first, ForwardIterator last,
BinaryPredicate binary_pred) {
first = adjacent_find(first, last, binary_pred);
return unique_copy(first, last, first, binary_pred);
}
template <class BidirectionalIterator>
void __reverse(BidirectionalIterator first, BidirectionalIterator last,
bidirectional_iterator_tag) {
while (true)
if (first == last || first == --last)
return;
else
iter_swap(first++, last);
}
template <class RandomAccessIterator>
void __reverse(RandomAccessIterator first, RandomAccessIterator last,
random_access_iterator_tag) {
while (first < last) iter_swap(first++, --last);
}
template <class BidirectionalIterator>
inline void reverse(BidirectionalIterator first, BidirectionalIterator last) {
__reverse(first, last, iterator_category(first));
}
template <class BidirectionalIterator, class OutputIterator>
OutputIterator reverse_copy(BidirectionalIterator first,
BidirectionalIterator last,
OutputIterator result) {
while (first != last) *result++ = *--last;
return result;
}
template <class ForwardIterator, class Distance>
void __rotate(ForwardIterator first, ForwardIterator middle,
ForwardIterator last, Distance*, forward_iterator_tag) {
for (ForwardIterator i = middle; ;) {
iter_swap(first++, i++);
if (first == middle) {
if (i == last) return;
middle = i;
} else if (i == last)
i = middle;
}
}
template <class BidirectionalIterator, class Distance>
void __rotate(BidirectionalIterator first, BidirectionalIterator middle,
BidirectionalIterator last, Distance*,
bidirectional_iterator_tag) {
reverse(first, middle);
reverse(middle, last);
reverse(first, last);
}
template <class EuclideanRingElement>
EuclideanRingElement __gcd(EuclideanRingElement m, EuclideanRingElement n)
{
while (n != 0) {
EuclideanRingElement t = m % n;
m = n;
n = t;
}
return m;
}
template <class RandomAccessIterator, class Distance, class T>
void __rotate_cycle(RandomAccessIterator first, RandomAccessIterator last,
RandomAccessIterator initial, Distance shift, T*) {
T value = *initial;
RandomAccessIterator ptr1 = initial;
RandomAccessIterator ptr2 = ptr1 + shift;
while (ptr2 != initial) {
*ptr1 = *ptr2;
ptr1 = ptr2;
if (last - ptr2 > shift)
ptr2 += shift;
else
ptr2 = first + (shift - (last - ptr2));
}
*ptr1 = value;
}
template <class RandomAccessIterator, class Distance>
void __rotate(RandomAccessIterator first, RandomAccessIterator middle,
RandomAccessIterator last, Distance*,
random_access_iterator_tag) {
Distance n = __gcd(last - first, middle - first);
while (n--)
__rotate_cycle(first, last, first + n, middle - first,
value_type(first));
}
template <class ForwardIterator>
inline void rotate(ForwardIterator first, ForwardIterator middle,
ForwardIterator last) {
if (first == middle || middle == last) return;
__rotate(first, middle, last, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class OutputIterator>
OutputIterator rotate_copy(ForwardIterator first, ForwardIterator middle,
ForwardIterator last, OutputIterator result) {
return copy(first, middle, copy(middle, last, result));
}
unsigned long __long_random(unsigned long);
template <class RandomAccessIterator, class Distance>
void __random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
Distance*) {
if (first == last) return;
for (RandomAccessIterator i = first + 1; i != last; ++i)
iter_swap(i, first + Distance(__long_random((i - first) + 1)));
}
template <class RandomAccessIterator>
inline void random_shuffle(RandomAccessIterator first,
RandomAccessIterator last) {
__random_shuffle(first, last, distance_type(first));
}
template <class RandomAccessIterator, class RandomNumberGenerator>
void random_shuffle(RandomAccessIterator first, RandomAccessIterator last,
RandomNumberGenerator& __rand) {
if (first == last) return;
for (RandomAccessIterator i = first + 1; i != last; ++i)
iter_swap(i, first + __rand((i - first) + 1));
}
template <class BidirectionalIterator, class Predicate>
BidirectionalIterator partition(BidirectionalIterator first,
BidirectionalIterator last, Predicate pred) {
while (true) {
while (true)
if (first == last)
return first;
else if (pred(*first))
++first;
else
break;
--last;
while (true)
if (first == last)
return first;
else if (!pred(*last))
--last;
else
break;
iter_swap(first, last);
++first;
}
}
template <class ForwardIterator, class Predicate, class Distance>
ForwardIterator __inplace_stable_partition(ForwardIterator first,
ForwardIterator last,
Predicate pred, Distance len) {
if (len == 1) return pred(*first) ? last : first;
ForwardIterator middle = first;
advance(middle, len / 2);
ForwardIterator
first_cut = __inplace_stable_partition(first, middle, pred, len / 2);
ForwardIterator
second_cut = __inplace_stable_partition(middle, last, pred,
len - len / 2);
rotate(first_cut, middle, second_cut);
len = 0;
distance(middle, second_cut, len);
advance(first_cut, len);
return first_cut;
}
template <class ForwardIterator, class Pointer, class Predicate,
class Distance, class T>
ForwardIterator __stable_partition_adaptive(ForwardIterator first,
ForwardIterator last,
Predicate pred, Distance len,
Pointer buffer,
Distance buffer_size,
Distance& fill_pointer, T*) {
if (len <= buffer_size) {
len = 0;
ForwardIterator result1 = first;
Pointer result2 = buffer;
while (first != last && len < fill_pointer)
if (pred(*first))
*result1++ = *first++;
else {
*result2++ = *first++;
++len;
}
if (first != last) {
raw_storage_iterator<Pointer, T> result3 = result2;
while (first != last)
if (pred(*first))
*result1++ = *first++;
else {
*result3++ = *first++;
++len;
}
fill_pointer = len;
}
copy(buffer, buffer + len, result1);
return result1;
}
ForwardIterator middle = first;
advance(middle, len / 2);
ForwardIterator first_cut = __stable_partition_adaptive
(first, middle, pred, len / 2, buffer, buffer_size, fill_pointer,
(T*)0);
ForwardIterator second_cut = __stable_partition_adaptive
(middle, last, pred, len - len / 2, buffer, buffer_size,
fill_pointer, (T*)0);
rotate(first_cut, middle, second_cut);
len = 0;
distance(middle, second_cut, len);
advance(first_cut, len);
return first_cut;
}
template <class ForwardIterator, class Predicate, class Pointer,
class Distance>
ForwardIterator __stable_partition(ForwardIterator first, ForwardIterator last,
Predicate pred, Distance len,
pair<Pointer, Distance> p) {
if (p.first == 0)
return __inplace_stable_partition(first, last, pred, len);
Distance fill_pointer = 0;
ForwardIterator result =
__stable_partition_adaptive(first, last, pred, len, p.first, p.second,
fill_pointer, value_type(first));
destroy(p.first, p.first + fill_pointer);
return_temporary_buffer(p.first);
return result;
}
template <class ForwardIterator, class Predicate, class Distance>
inline ForwardIterator __stable_partition_aux(ForwardIterator first,
ForwardIterator last,
Predicate pred, Distance*) {
Distance len = 0;
distance(first, last, len);
return __stable_partition(first, last, pred, len,
get_temporary_buffer(len, value_type(first)));
}
template <class ForwardIterator, class Predicate>
inline ForwardIterator stable_partition(ForwardIterator first,
ForwardIterator last,
Predicate pred) {
return __stable_partition_aux(first, last, pred, distance_type(first));
}
template <class RandomAccessIterator, class T>
RandomAccessIterator __unguarded_partition(RandomAccessIterator first,
RandomAccessIterator last,
T pivot) {
while (1) {
while (*first < pivot) ++first;
--last;
while (pivot < *last) --last;
if (!(first < last)) return first;
iter_swap(first, last);
++first;
}
}
template <class RandomAccessIterator, class T, class Compare>
RandomAccessIterator __unguarded_partition(RandomAccessIterator first,
RandomAccessIterator last,
T pivot, Compare comp) {
while (1) {
while (comp(*first, pivot)) ++first;
--last;
while (comp(pivot, *last)) --last;
if (!(first < last)) return first;
iter_swap(first, last);
++first;
}
}
const int __stl_threshold = 16;
template <class RandomAccessIterator, class T>
void __quick_sort_loop_aux(RandomAccessIterator first,
RandomAccessIterator last, T*) {
while (last - first > __stl_threshold) {
RandomAccessIterator cut = __unguarded_partition
(first, last, T(__median(*first, *(first + (last - first)/2),
*(last - 1))));
if (cut - first >= last - cut) {
__quick_sort_loop(cut, last);
last = cut;
} else {
__quick_sort_loop(first, cut);
first = cut;
}
}
}
template <class RandomAccessIterator>
inline void __quick_sort_loop(RandomAccessIterator first,
RandomAccessIterator last) {
__quick_sort_loop_aux(first, last, value_type(first));
}
template <class RandomAccessIterator, class T, class Compare>
void __quick_sort_loop_aux(RandomAccessIterator first,
RandomAccessIterator last, T*, Compare comp) {
while (last - first > __stl_threshold) {
RandomAccessIterator cut = __unguarded_partition
(first, last, T(__median(*first, *(first + (last - first)/2),
*(last - 1), comp)), comp);
if (cut - first >= last - cut) {
__quick_sort_loop(cut, last, comp);
last = cut;
} else {
__quick_sort_loop(first, cut, comp);
first = cut;
}
}
}
template <class RandomAccessIterator, class Compare>
inline void __quick_sort_loop(RandomAccessIterator first,
RandomAccessIterator last, Compare comp) {
__quick_sort_loop_aux(first, last, value_type(first), comp);
}
template <class RandomAccessIterator, class T>
void __unguarded_linear_insert(RandomAccessIterator last, T value) {
RandomAccessIterator next = last;
--next;
while (value < *next) {
*last = *next;
last = next--;
}
*last = value;
}
template <class RandomAccessIterator, class T, class Compare>
void __unguarded_linear_insert(RandomAccessIterator last, T value,
Compare comp) {
RandomAccessIterator next = last;
--next;
while (comp(value , *next)) {
*last = *next;
last = next--;
}
*last = value;
}
template <class RandomAccessIterator, class T>
inline void __linear_insert(RandomAccessIterator first,
RandomAccessIterator last, T*) {
T value = *last;
if (value < *first) {
copy_backward(first, last, last + 1);
*first = value;
} else
__unguarded_linear_insert(last, value);
}
template <class RandomAccessIterator, class T, class Compare>
inline void __linear_insert(RandomAccessIterator first,
RandomAccessIterator last, T*, Compare comp) {
T value = *last;
if (comp(value, *first)) {
copy_backward(first, last, last + 1);
*first = value;
} else
__unguarded_linear_insert(last, value, comp);
}
template <class RandomAccessIterator>
void __insertion_sort(RandomAccessIterator first, RandomAccessIterator last) {
if (first == last) return;
for (RandomAccessIterator i = first + 1; i != last; ++i)
__linear_insert(first, i, value_type(first));
}
template <class RandomAccessIterator, class Compare>
void __insertion_sort(RandomAccessIterator first,
RandomAccessIterator last, Compare comp) {
if (first == last) return;
for (RandomAccessIterator i = first + 1; i != last; ++i)
__linear_insert(first, i, value_type(first), comp);
}
template <class RandomAccessIterator, class T>
void __unguarded_insertion_sort_aux(RandomAccessIterator first,
RandomAccessIterator last, T*) {
for (RandomAccessIterator i = first; i != last; ++i)
__unguarded_linear_insert(i, T(*i));
}
template <class RandomAccessIterator>
inline void __unguarded_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last) {
__unguarded_insertion_sort_aux(first, last, value_type(first));
}
template <class RandomAccessIterator, class T, class Compare>
void __unguarded_insertion_sort_aux(RandomAccessIterator first,
RandomAccessIterator last,
T*, Compare comp) {
for (RandomAccessIterator i = first; i != last; ++i)
__unguarded_linear_insert(i, T(*i), comp);
}
template <class RandomAccessIterator, class Compare>
inline void __unguarded_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last,
Compare comp) {
__unguarded_insertion_sort_aux(first, last, value_type(first), comp);
}
template <class RandomAccessIterator>
void __final_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last) {
if (last - first > __stl_threshold) {
__insertion_sort(first, first + __stl_threshold);
__unguarded_insertion_sort(first + __stl_threshold, last);
} else
__insertion_sort(first, last);
}
template <class RandomAccessIterator, class Compare>
void __final_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last, Compare comp) {
if (last - first > __stl_threshold) {
__insertion_sort(first, first + __stl_threshold, comp);
__unguarded_insertion_sort(first + __stl_threshold, last, comp);
} else
__insertion_sort(first, last, comp);
}
template <class RandomAccessIterator>
void sort(RandomAccessIterator first, RandomAccessIterator last) {
__quick_sort_loop(first, last);
__final_insertion_sort(first, last);
}
template <class RandomAccessIterator, class Compare>
void sort(RandomAccessIterator first, RandomAccessIterator last,
Compare comp) {
__quick_sort_loop(first, last, comp);
__final_insertion_sort(first, last, comp);
}
template <class RandomAccessIterator>
void __inplace_stable_sort(RandomAccessIterator first,
RandomAccessIterator last) {
if (last - first < 15) {
__insertion_sort(first, last);
return;
}
RandomAccessIterator middle = first + (last - first) / 2;
__inplace_stable_sort(first, middle);
__inplace_stable_sort(middle, last);
__merge_without_buffer(first, middle, last, middle - first, last - middle);
}
template <class RandomAccessIterator, class Compare>
void __inplace_stable_sort(RandomAccessIterator first,
RandomAccessIterator last, Compare comp) {
if (last - first < 15) {
__insertion_sort(first, last, comp);
return;
}
RandomAccessIterator middle = first + (last - first) / 2;
__inplace_stable_sort(first, middle, comp);
__inplace_stable_sort(middle, last, comp);
__merge_without_buffer(first, middle, last, middle - first,
last - middle, comp);
}
template <class RandomAccessIterator1, class RandomAccessIterator2,
class Distance>
void __merge_sort_loop(RandomAccessIterator1 first,
RandomAccessIterator1 last,
RandomAccessIterator2 result, Distance step_size) {
Distance two_step = 2 * step_size;
while (last - first >= two_step) {
result = merge(first, first + step_size,
first + step_size, first + two_step, result);
first += two_step;
}
step_size = min(Distance(last - first), step_size);
merge(first, first + step_size, first + step_size, last, result);
}
template <class RandomAccessIterator1, class RandomAccessIterator2,
class Distance, class Compare>
void __merge_sort_loop(RandomAccessIterator1 first,
RandomAccessIterator1 last,
RandomAccessIterator2 result, Distance step_size,
Compare comp) {
Distance two_step = 2 * step_size;
while (last - first >= two_step) {
result = merge(first, first + step_size,
first + step_size, first + two_step, result, comp);
first += two_step;
}
step_size = min(Distance(last - first), step_size);
merge(first, first + step_size, first + step_size, last, result, comp);
}
const int __stl_chunk_size = 7;
template <class RandomAccessIterator, class Distance>
void __chunk_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last, Distance chunk_size) {
while (last - first >= chunk_size) {
__insertion_sort(first, first + chunk_size);
first += chunk_size;
}
__insertion_sort(first, last);
}
template <class RandomAccessIterator, class Distance, class Compare>
void __chunk_insertion_sort(RandomAccessIterator first,
RandomAccessIterator last,
Distance chunk_size, Compare comp) {
while (last - first >= chunk_size) {
__insertion_sort(first, first + chunk_size, comp);
first += chunk_size;
}
__insertion_sort(first, last, comp);
}
template <class RandomAccessIterator, class Pointer, class Distance, class T>
void __merge_sort_with_buffer(RandomAccessIterator first,
RandomAccessIterator last,
Pointer buffer, Distance*, T*) {
Distance len = last - first;
Pointer buffer_last = buffer + len;
Distance step_size = __stl_chunk_size;
__chunk_insertion_sort(first, last, step_size);
while (step_size < len) {
__merge_sort_loop(first, last, buffer, step_size);
step_size *= 2;
__merge_sort_loop(buffer, buffer_last, first, step_size);
step_size *= 2;
}
}
template <class RandomAccessIterator, class Pointer, class Distance, class T,
class Compare>
void __merge_sort_with_buffer(RandomAccessIterator first,
RandomAccessIterator last, Pointer buffer,
Distance*, T*, Compare comp) {
Distance len = last - first;
Pointer buffer_last = buffer + len;
Distance step_size = __stl_chunk_size;
__chunk_insertion_sort(first, last, step_size, comp);
while (step_size < len) {
__merge_sort_loop(first, last, buffer, step_size, comp);
step_size *= 2;
__merge_sort_loop(buffer, buffer_last, first, step_size, comp);
step_size *= 2;
}
}
template <class RandomAccessIterator, class Pointer, class Distance, class T>
void __stable_sort_adaptive(RandomAccessIterator first,
RandomAccessIterator last, Pointer buffer,
Distance buffer_size, T*) {
Distance len = (last - first + 1) / 2;
RandomAccessIterator middle = first + len;
if (len > buffer_size) {
__stable_sort_adaptive(first, middle, buffer, buffer_size, (T*)0);
__stable_sort_adaptive(middle, last, buffer, buffer_size, (T*)0);
} else {
__merge_sort_with_buffer(first, middle, buffer, (Distance*)0, (T*)0);
__merge_sort_with_buffer(middle, last, buffer, (Distance*)0, (T*)0);
}
__merge_adaptive(first, middle, last, Distance(middle - first),
Distance(last - middle), buffer, buffer_size, (T*)0);
}
template <class RandomAccessIterator, class Pointer, class Distance, class T,
class Compare>
void __stable_sort_adaptive(RandomAccessIterator first,
RandomAccessIterator last, Pointer buffer,
Distance buffer_size, T*, Compare comp) {
Distance len = (last - first + 1) / 2;
RandomAccessIterator middle = first + len;
if (len > buffer_size) {
__stable_sort_adaptive(first, middle, buffer, buffer_size, (T*)0, comp);
__stable_sort_adaptive(middle, last, buffer, buffer_size, (T*)0, comp);
} else {
__merge_sort_with_buffer(first, middle, buffer, (Distance*)0, (T*)0,
comp);
__merge_sort_with_buffer(middle, last, buffer, (Distance*)0, (T*)0,
comp);
}
__merge_adaptive(first, middle, last, Distance(middle - first),
Distance(last - middle), buffer, buffer_size, (T*)0, comp);
}
template <class RandomAccessIterator, class Pointer, class Distance, class T>
inline void __stable_sort(RandomAccessIterator first,
RandomAccessIterator last,
pair<Pointer, Distance> p, T*) {
if (p.first == 0) {
__inplace_stable_sort(first, last);
return;
}
Distance len = min(p.second, last - first);
copy(first, first + len, raw_storage_iterator<Pointer, T>(p.first));
__stable_sort_adaptive(first, last, p.first, p.second, (T*)0);
destroy(p.first, p.first + len);
return_temporary_buffer(p.first);
}
template <class RandomAccessIterator, class Pointer, class Distance, class T,
class Compare>
inline void __stable_sort(RandomAccessIterator first,
RandomAccessIterator last,
pair<Pointer, Distance> p, T*, Compare comp) {
if (p.first == 0) {
__inplace_stable_sort(first, last, comp);
return;
}
Distance len = min(p.second, last - first);
copy(first, first + len, raw_storage_iterator<Pointer, T>(p.first));
__stable_sort_adaptive(first, last, p.first, p.second, (T*)0, comp);
destroy(p.first, p.first + len);
return_temporary_buffer(p.first);
}
template <class RandomAccessIterator, class T, class Distance>
inline void __stable_sort_aux(RandomAccessIterator first,
RandomAccessIterator last, T*, Distance*) {
__stable_sort(first, last, get_temporary_buffer(Distance(last - first),
(T*)0), (T*)0);
}
template <class RandomAccessIterator, class T, class Distance, class Compare>
inline void __stable_sort_aux(RandomAccessIterator first,
RandomAccessIterator last, T*, Distance*,
Compare comp) {
__stable_sort(first, last, get_temporary_buffer(Distance(last - first),
(T*)0), (T*)0, comp);
}
template <class RandomAccessIterator>
inline void stable_sort(RandomAccessIterator first,
RandomAccessIterator last) {
__stable_sort_aux(first, last, value_type(first), distance_type(first));
}
template <class RandomAccessIterator, class Compare>
inline void stable_sort(RandomAccessIterator first,
RandomAccessIterator last, Compare comp) {
__stable_sort_aux(first, last, value_type(first), distance_type(first),
comp);
}
template <class RandomAccessIterator, class T>
void __partial_sort(RandomAccessIterator first, RandomAccessIterator middle,
RandomAccessIterator last, T*) {
make_heap(first, middle);
for (RandomAccessIterator i = middle; i < last; ++i)
if (*i < *first)
__pop_heap(first, middle, i, T(*i), distance_type(first));
sort_heap(first, middle);
}
template <class RandomAccessIterator>
inline void partial_sort(RandomAccessIterator first,
RandomAccessIterator middle,
RandomAccessIterator last) {
__partial_sort(first, middle, last, value_type(first));
}
template <class RandomAccessIterator, class T, class Compare>
void __partial_sort(RandomAccessIterator first, RandomAccessIterator middle,
RandomAccessIterator last, T*, Compare comp) {
make_heap(first, middle, comp);
for (RandomAccessIterator i = middle; i < last; ++i)
if (comp(*i, *first))
__pop_heap(first, middle, i, T(*i), comp, distance_type(first));
sort_heap(first, middle, comp);
}
template <class RandomAccessIterator, class Compare>
inline void partial_sort(RandomAccessIterator first,
RandomAccessIterator middle,
RandomAccessIterator last, Compare comp) {
__partial_sort(first, middle, last, value_type(first), comp);
}
template <class InputIterator, class RandomAccessIterator, class Distance,
class T>
RandomAccessIterator __partial_sort_copy(InputIterator first,
InputIterator last,
RandomAccessIterator result_first,
RandomAccessIterator result_last,
Distance*, T*) {
if (result_first == result_last) return result_last;
RandomAccessIterator result_real_last = result_first;
while(first != last && result_real_last != result_last)
*result_real_last++ = *first++;
make_heap(result_first, result_real_last);
while (first != last) {
if (*first < *result_first)
__adjust_heap(result_first, Distance(0),
Distance(result_real_last - result_first), T(*first));
++first;
}
sort_heap(result_first, result_real_last);
return result_real_last;
}
template <class InputIterator, class RandomAccessIterator>
inline RandomAccessIterator
partial_sort_copy(InputIterator first, InputIterator last,
RandomAccessIterator result_first,
RandomAccessIterator result_last) {
return __partial_sort_copy(first, last, result_first, result_last,
distance_type(result_first), value_type(first));
}
template <class InputIterator, class RandomAccessIterator, class Compare,
class Distance, class T>
RandomAccessIterator __partial_sort_copy(InputIterator first,
InputIterator last,
RandomAccessIterator result_first,
RandomAccessIterator result_last,
Compare comp, Distance*, T*) {
if (result_first == result_last) return result_last;
RandomAccessIterator result_real_last = result_first;
while(first != last && result_real_last != result_last)
*result_real_last++ = *first++;
make_heap(result_first, result_real_last, comp);
while (first != last) {
if (comp(*first, *result_first))
__adjust_heap(result_first, Distance(0),
Distance(result_real_last - result_first), T(*first),
comp);
++first;
}
sort_heap(result_first, result_real_last, comp);
return result_real_last;
}
template <class InputIterator, class RandomAccessIterator, class Compare>
inline RandomAccessIterator
partial_sort_copy(InputIterator first, InputIterator last,
RandomAccessIterator result_first,
RandomAccessIterator result_last, Compare comp) {
return __partial_sort_copy(first, last, result_first, result_last, comp,
distance_type(result_first), value_type(first));
}
template <class RandomAccessIterator, class T>
void __nth_element(RandomAccessIterator first, RandomAccessIterator nth,
RandomAccessIterator last, T*) {
while (last - first > 3) {
RandomAccessIterator cut = __unguarded_partition
(first, last, T(__median(*first, *(first + (last - first)/2),
*(last - 1))));
if (cut <= nth)
first = cut;
else
last = cut;
}
__insertion_sort(first, last);
}
template <class RandomAccessIterator>
inline void nth_element(RandomAccessIterator first, RandomAccessIterator nth,
RandomAccessIterator last) {
__nth_element(first, nth, last, value_type(first));
}
template <class RandomAccessIterator, class T, class Compare>
void __nth_element(RandomAccessIterator first, RandomAccessIterator nth,
RandomAccessIterator last, T*, Compare comp) {
while (last - first > 3) {
RandomAccessIterator cut = __unguarded_partition
(first, last, T(__median(*first, *(first + (last - first)/2),
*(last - 1), comp)), comp);
if (cut <= nth)
first = cut;
else
last = cut;
}
__insertion_sort(first, last, comp);
}
template <class RandomAccessIterator, class Compare>
inline void nth_element(RandomAccessIterator first, RandomAccessIterator nth,
RandomAccessIterator last, Compare comp) {
__nth_element(first, nth, last, value_type(first), comp);
}
template <class ForwardIterator, class T, class Distance>
ForwardIterator __lower_bound(ForwardIterator first, ForwardIterator last,
const T& value, Distance*,
forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (*middle < value) {
first = middle;
++first;
len = len - half - 1;
} else
len = half;
}
return first;
}
template <class ForwardIterator, class T, class Distance>
inline ForwardIterator __lower_bound(ForwardIterator first,
ForwardIterator last,
const T& value, Distance*,
bidirectional_iterator_tag) {
return __lower_bound(first, last, value, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Distance>
RandomAccessIterator __lower_bound(RandomAccessIterator first,
RandomAccessIterator last, const T& value,
Distance*, random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle;
while (len > 0) {
half = len / 2;
middle = first + half;
if (*middle < value) {
first = middle + 1;
len = len - half - 1;
} else
len = half;
}
return first;
}
template <class ForwardIterator, class T>
inline ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last,
const T& value) {
return __lower_bound(first, last, value, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T, class Compare, class Distance>
ForwardIterator __lower_bound(ForwardIterator first, ForwardIterator last,
const T& value, Compare comp, Distance*,
forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (comp(*middle, value)) {
first = middle;
++first;
len = len - half - 1;
} else
len = half;
}
return first;
}
template <class ForwardIterator, class T, class Compare, class Distance>
inline ForwardIterator __lower_bound(ForwardIterator first,
ForwardIterator last,
const T& value, Compare comp, Distance*,
bidirectional_iterator_tag) {
return __lower_bound(first, last, value, comp, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Compare, class Distance>
RandomAccessIterator __lower_bound(RandomAccessIterator first,
RandomAccessIterator last,
const T& value, Compare comp, Distance*,
random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle;
while (len > 0) {
half = len / 2;
middle = first + half;
if (comp(*middle, value)) {
first = middle + 1;
len = len - half - 1;
} else
len = half;
}
return first;
}
template <class ForwardIterator, class T, class Compare>
inline ForwardIterator lower_bound(ForwardIterator first, ForwardIterator last,
const T& value, Compare comp) {
return __lower_bound(first, last, value, comp, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T, class Distance>
ForwardIterator __upper_bound(ForwardIterator first, ForwardIterator last,
const T& value, Distance*,
forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (value < *middle)
len = half;
else {
first = middle;
++first;
len = len - half - 1;
}
}
return first;
}
template <class ForwardIterator, class T, class Distance>
inline ForwardIterator __upper_bound(ForwardIterator first,
ForwardIterator last,
const T& value, Distance*,
bidirectional_iterator_tag) {
return __upper_bound(first, last, value, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Distance>
RandomAccessIterator __upper_bound(RandomAccessIterator first,
RandomAccessIterator last, const T& value,
Distance*, random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle;
while (len > 0) {
half = len / 2;
middle = first + half;
if (value < *middle)
len = half;
else {
first = middle + 1;
len = len - half - 1;
}
}
return first;
}
template <class ForwardIterator, class T>
inline ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last,
const T& value) {
return __upper_bound(first, last, value, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T, class Compare, class Distance>
ForwardIterator __upper_bound(ForwardIterator first, ForwardIterator last,
const T& value, Compare comp, Distance*,
forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (comp(value, *middle))
len = half;
else {
first = middle;
++first;
len = len - half - 1;
}
}
return first;
}
template <class ForwardIterator, class T, class Compare, class Distance>
inline ForwardIterator __upper_bound(ForwardIterator first,
ForwardIterator last,
const T& value, Compare comp, Distance*,
bidirectional_iterator_tag) {
return __upper_bound(first, last, value, comp, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Compare, class Distance>
RandomAccessIterator __upper_bound(RandomAccessIterator first,
RandomAccessIterator last,
const T& value, Compare comp, Distance*,
random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle;
while (len > 0) {
half = len / 2;
middle = first + half;
if (comp(value, *middle))
len = half;
else {
first = middle + 1;
len = len - half - 1;
}
}
return first;
}
template <class ForwardIterator, class T, class Compare>
inline ForwardIterator upper_bound(ForwardIterator first, ForwardIterator last,
const T& value, Compare comp) {
return __upper_bound(first, last, value, comp, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T, class Distance>
pair<ForwardIterator, ForwardIterator>
__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
Distance*, forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle, left, right;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (*middle < value) {
first = middle;
++first;
len = len - half - 1;
} else if (value < *middle)
len = half;
else {
left = lower_bound(first, middle, value);
advance(first, len);
right = upper_bound(++middle, first, value);
return pair<ForwardIterator, ForwardIterator>(left, right);
}
}
return pair<ForwardIterator, ForwardIterator>(first, first);
}
template <class ForwardIterator, class T, class Distance>
inline pair<ForwardIterator, ForwardIterator>
__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
Distance*, bidirectional_iterator_tag) {
return __equal_range(first, last, value, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Distance>
pair<RandomAccessIterator, RandomAccessIterator>
__equal_range(RandomAccessIterator first, RandomAccessIterator last,
const T& value, Distance*, random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle, left, right;
while (len > 0) {
half = len / 2;
middle = first + half;
if (*middle < value) {
first = middle + 1;
len = len - half - 1;
} else if (value < *middle)
len = half;
else {
left = lower_bound(first, middle, value);
right = upper_bound(++middle, first + len, value);
return pair<RandomAccessIterator, RandomAccessIterator>(left,
right);
}
}
return pair<RandomAccessIterator, RandomAccessIterator>(first, first);
}
template <class ForwardIterator, class T>
inline pair<ForwardIterator, ForwardIterator>
equal_range(ForwardIterator first, ForwardIterator last, const T& value) {
return __equal_range(first, last, value, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T, class Compare, class Distance>
pair<ForwardIterator, ForwardIterator>
__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
Compare comp, Distance*, forward_iterator_tag) {
Distance len = 0;
distance(first, last, len);
Distance half;
ForwardIterator middle, left, right;
while (len > 0) {
half = len / 2;
middle = first;
advance(middle, half);
if (comp(*middle, value)) {
first = middle;
++first;
len = len - half - 1;
} else if (comp(value, *middle))
len = half;
else {
left = lower_bound(first, middle, value, comp);
advance(first, len);
right = upper_bound(++middle, first, value, comp);
return pair<ForwardIterator, ForwardIterator>(left, right);
}
}
return pair<ForwardIterator, ForwardIterator>(first, first);
}
template <class ForwardIterator, class T, class Compare, class Distance>
inline pair<ForwardIterator, ForwardIterator>
__equal_range(ForwardIterator first, ForwardIterator last, const T& value,
Compare comp, Distance*, bidirectional_iterator_tag) {
return __equal_range(first, last, value, comp, (Distance*)0,
forward_iterator_tag());
}
template <class RandomAccessIterator, class T, class Compare, class Distance>
pair<RandomAccessIterator, RandomAccessIterator>
__equal_range(RandomAccessIterator first, RandomAccessIterator last,
const T& value, Compare comp, Distance*,
random_access_iterator_tag) {
Distance len = last - first;
Distance half;
RandomAccessIterator middle, left, right;
while (len > 0) {
half = len / 2;
middle = first + half;
if (comp(*middle, value)) {
first = middle + 1;
len = len - half - 1;
} else if (comp(value, *middle))
len = half;
else {
left = lower_bound(first, middle, value, comp);
right = upper_bound(++middle, first + len, value, comp);
return pair<RandomAccessIterator, RandomAccessIterator>(left,
right);
}
}
return pair<RandomAccessIterator, RandomAccessIterator>(first, first);
}
template <class ForwardIterator, class T, class Compare>
inline pair<ForwardIterator, ForwardIterator>
equal_range(ForwardIterator first, ForwardIterator last, const T& value,
Compare comp) {
return __equal_range(first, last, value, comp, distance_type(first),
iterator_category(first));
}
template <class ForwardIterator, class T>
bool binary_search(ForwardIterator first, ForwardIterator last,
const T& value) {
ForwardIterator i = lower_bound(first, last, value);
return i != last && !(value < *i);
}
template <class ForwardIterator, class T, class Compare>
bool binary_search(ForwardIterator first, ForwardIterator last, const T& value,
Compare comp) {
ForwardIterator i = lower_bound(first, last, value, comp);
return i != last && !comp(value, *i);
}
template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator merge(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result) {
while (first1 != last1 && first2 != last2)
if (*first2 < *first1)
*result++ = *first2++;
else
*result++ = *first1++;
return copy(first2, last2, copy(first1, last1, result));
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class Compare>
OutputIterator merge(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first2, *first1))
*result++ = *first2++;
else
*result++ = *first1++;
return copy(first2, last2, copy(first1, last1, result));
}
template <class BidirectionalIterator, class Distance>
void __merge_without_buffer(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last,
Distance len1, Distance len2) {
if (len1 == 0 || len2 == 0) return;
if (len1 + len2 == 2) {
if (*middle < *first) iter_swap(first, middle);
return;
}
BidirectionalIterator first_cut = first;
BidirectionalIterator second_cut = middle;
Distance len11 = 0;
Distance len22 = 0;
if (len1 > len2) {
len11 = len1 / 2;
advance(first_cut, len11);
second_cut = lower_bound(middle, last, *first_cut);
distance(middle, second_cut, len22);
} else {
len22 = len2 / 2;
advance(second_cut, len22);
first_cut = upper_bound(first, middle, *second_cut);
distance(first, first_cut, len11);
}
rotate(first_cut, middle, second_cut);
BidirectionalIterator new_middle = first_cut;
advance(new_middle, len22);
__merge_without_buffer(first, first_cut, new_middle, len11, len22);
__merge_without_buffer(new_middle, second_cut, last, len1 - len11,
len2 - len22);
}
template <class BidirectionalIterator, class Distance, class Compare>
void __merge_without_buffer(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last,
Distance len1, Distance len2, Compare comp) {
if (len1 == 0 || len2 == 0) return;
if (len1 + len2 == 2) {
if (comp(*middle, *first)) iter_swap(first, middle);
return;
}
BidirectionalIterator first_cut = first;
BidirectionalIterator second_cut = middle;
Distance len11 = 0;
Distance len22 = 0;
if (len1 > len2) {
len11 = len1 / 2;
advance(first_cut, len11);
second_cut = lower_bound(middle, last, *first_cut, comp);
distance(middle, second_cut, len22);
} else {
len22 = len2 / 2;
advance(second_cut, len22);
first_cut = upper_bound(first, middle, *second_cut, comp);
distance(first, first_cut, len11);
}
rotate(first_cut, middle, second_cut);
BidirectionalIterator new_middle = first_cut;
advance(new_middle, len22);
__merge_without_buffer(first, first_cut, new_middle, len11, len22, comp);
__merge_without_buffer(new_middle, second_cut, last, len1 - len11,
len2 - len22, comp);
}
template <class InputIterator, class OutputIterator>
OutputIterator __borland_bugfix_copy(InputIterator first, InputIterator last,
OutputIterator result) {
// this is used in __rotate_adaptive to work around some obscure Borland
// bug. It is the same as copy, but with a different (and appropriate) name.
while (first != last) *result++ = *first++;
return result;
}
template <class BidirectionalIterator1, class BidirectionalIterator2,
class Distance>
BidirectionalIterator1 __rotate_adaptive(BidirectionalIterator1 first,
BidirectionalIterator1 middle,
BidirectionalIterator1 last,
Distance len1, Distance len2,
BidirectionalIterator2 buffer,
Distance buffer_size) {
BidirectionalIterator2 buffer_end;
if (len1 > len2 && len2 <= buffer_size) {
buffer_end = __borland_bugfix_copy(middle, last, buffer);
copy_backward(first, middle, last);
return copy(buffer, buffer_end, first);
} else if (len1 <= buffer_size) {
buffer_end = __borland_bugfix_copy(first, middle, buffer);
copy(middle, last, first);
return copy_backward(buffer, buffer_end, last);
} else {
rotate(first, middle, last);
advance(first, len2);
return first;
}
}
template <class BidirectionalIterator1, class BidirectionalIterator2,
class BidirectionalIterator3>
BidirectionalIterator3 __merge_backward(BidirectionalIterator1 first1,
BidirectionalIterator1 last1,
BidirectionalIterator2 first2,
BidirectionalIterator2 last2,
BidirectionalIterator3 result) {
if (first1 == last1) return copy_backward(first2, last2, result);
if (first2 == last2) return copy_backward(first1, last1, result);
--last1;
--last2;
while (true) {
if (*last2 < *last1) {
*--result = *last1;
if (first1 == last1) return copy_backward(first2, ++last2, result);
--last1;
} else {
*--result = *last2;
if (first2 == last2) return copy_backward(first1, ++last1, result);
--last2;
}
}
}
template <class BidirectionalIterator1, class BidirectionalIterator2,
class BidirectionalIterator3, class Compare>
BidirectionalIterator3 __merge_backward(BidirectionalIterator1 first1,
BidirectionalIterator1 last1,
BidirectionalIterator2 first2,
BidirectionalIterator2 last2,
BidirectionalIterator3 result,
Compare comp) {
if (first1 == last1) return copy_backward(first2, last2, result);
if (first2 == last2) return copy_backward(first1, last1, result);
--last1;
--last2;
while (true) {
if (comp(*last2, *last1)) {
*--result = *last1;
if (first1 == last1) return copy_backward(first2, ++last2, result);
--last1;
} else {
*--result = *last2;
if (first2 == last2) return copy_backward(first1, ++last1, result);
--last2;
}
}
}
template <class BidirectionalIterator, class Distance, class Pointer, class T>
void __merge_adaptive(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, Distance len1, Distance len2,
Pointer buffer, Distance buffer_size, T*) {
if (len1 <= len2 && len1 <= buffer_size) {
Pointer end_buffer = copy(first, middle, buffer);
merge(buffer, end_buffer, middle, last, first);
} else if (len2 <= buffer_size) {
Pointer end_buffer = copy(middle, last, buffer);
__merge_backward(first, middle, buffer, end_buffer, last);
} else {
BidirectionalIterator first_cut = first;
BidirectionalIterator second_cut = middle;
Distance len11 = 0;
Distance len22 = 0;
if (len1 > len2) {
len11 = len1 / 2;
advance(first_cut, len11);
second_cut = lower_bound(middle, last, *first_cut);
distance(middle, second_cut, len22);
} else {
len22 = len2 / 2;
advance(second_cut, len22);
first_cut = upper_bound(first, middle, *second_cut);
distance(first, first_cut, len11);
}
BidirectionalIterator new_middle =
__rotate_adaptive(first_cut, middle, second_cut, len1 - len11,
len22, buffer, buffer_size);
__merge_adaptive(first, first_cut, new_middle, len11, len22, buffer,
buffer_size, (T*)0);
__merge_adaptive(new_middle, second_cut, last, len1 - len11,
len2 - len22, buffer, buffer_size, (T*)0);
}
}
template <class BidirectionalIterator, class Distance, class Pointer, class T,
class Compare>
void __merge_adaptive(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, Distance len1, Distance len2,
Pointer buffer, Distance buffer_size, T*, Compare comp) {
if (len1 <= len2 && len1 <= buffer_size) {
Pointer end_buffer = copy(first, middle, buffer);
merge(buffer, end_buffer, middle, last, first, comp);
} else if (len2 <= buffer_size) {
Pointer end_buffer = copy(middle, last, buffer);
__merge_backward(first, middle, buffer, end_buffer, last, comp);
} else {
BidirectionalIterator first_cut = first;
BidirectionalIterator second_cut = middle;
Distance len11 = 0;
Distance len22 = 0;
if (len1 > len2) {
len11 = len1 / 2;
advance(first_cut, len11);
second_cut = lower_bound(middle, last, *first_cut, comp);
distance(middle, second_cut, len22);
} else {
len22 = len2 / 2;
advance(second_cut, len22);
first_cut = upper_bound(first, middle, *second_cut, comp);
distance(first, first_cut, len11);
}
BidirectionalIterator new_middle =
__rotate_adaptive(first_cut, middle, second_cut, len1 - len11,
len22, buffer, buffer_size);
__merge_adaptive(first, first_cut, new_middle, len11, len22, buffer,
buffer_size, (T*)0, comp);
__merge_adaptive(new_middle, second_cut, last, len1 - len11,
len2 - len22, buffer, buffer_size, (T*)0, comp);
}
}
template <class BidirectionalIterator, class Distance, class Pointer, class T>
void __inplace_merge(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, Distance len1, Distance len2,
pair<Pointer, Distance> p, T*) {
if (p.first == 0) {
__merge_without_buffer(first, middle, last, len1, len2);
return;
}
Distance len = min(p.second, len1 + len2);
fill_n(raw_storage_iterator<Pointer, T>(p.first), len, *first);
__merge_adaptive(first, middle, last, len1, len2, p.first, p.second, (T*)0);
destroy(p.first, p.first + len);
return_temporary_buffer(p.first);
}
template <class BidirectionalIterator, class Distance, class Pointer, class T,
class Compare>
void __inplace_merge(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, Distance len1, Distance len2,
pair<Pointer, Distance> p, T*, Compare comp) {
if (p.first == 0) {
__merge_without_buffer(first, middle, last, len1, len2, comp);
return;
}
Distance len = min(p.second, len1 + len2);
fill_n(raw_storage_iterator<Pointer, T>(p.first), len, *first);
__merge_adaptive(first, middle, last, len1, len2, p.first, p.second, (T*)0,
comp);
destroy(p.first, p.first + len);
return_temporary_buffer(p.first);
}
template <class BidirectionalIterator, class T, class Distance>
inline void __inplace_merge_aux(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, T*, Distance*) {
Distance len1 = 0;
distance(first, middle, len1);
Distance len2 = 0;
distance(middle, last, len2);
__inplace_merge(first, middle, last, len1, len2,
get_temporary_buffer(len1 + len2, (T*)0), (T*)0);
}
template <class BidirectionalIterator, class T, class Distance, class Compare>
inline void __inplace_merge_aux(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, T*, Distance*,
Compare comp) {
Distance len1 = 0;
distance(first, middle, len1);
Distance len2 = 0;
distance(middle, last, len2);
__inplace_merge(first, middle, last, len1, len2,
get_temporary_buffer(len1 + len2, (T*)0), (T*)0,
comp);
}
template <class BidirectionalIterator>
inline void inplace_merge(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last) {
if (first == middle || middle == last) return;
__inplace_merge_aux(first, middle, last, value_type(first),
distance_type(first));
}
template <class BidirectionalIterator, class Compare>
inline void inplace_merge(BidirectionalIterator first,
BidirectionalIterator middle,
BidirectionalIterator last, Compare comp) {
if (first == middle || middle == last) return;
__inplace_merge_aux(first, middle, last, value_type(first),
distance_type(first), comp);
}
template <class InputIterator1, class InputIterator2>
bool includes(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2) {
while (first1 != last1 && first2 != last2)
if (*first2 < *first1)
return false;
else if(*first1 < *first2)
++first1;
else
++first1, ++first2;
return first2 == last2;
}
template <class InputIterator1, class InputIterator2, class Compare>
bool includes(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first2, *first1))
return false;
else if(comp(*first1, *first2))
++first1;
else
++first1, ++first2;
return first2 == last2;
}
template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator set_union(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result) {
while (first1 != last1 && first2 != last2)
if (*first1 < *first2)
*result++ = *first1++;
else if (*first2 < *first1)
*result++ = *first2++;
else {
*result++ = *first1++;
first2++;
}
return copy(first2, last2, copy(first1, last1, result));
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class Compare>
OutputIterator set_union(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first1, *first2))
*result++ = *first1++;
else if (comp(*first2, *first1))
*result++ = *first2++;
else {
*result++ = *first1++;
++first2;
}
return copy(first2, last2, copy(first1, last1, result));
}
template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator set_intersection(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result) {
while (first1 != last1 && first2 != last2)
if (*first1 < *first2)
++first1;
else if (*first2 < *first1)
++first2;
else {
*result++ = *first1++;
++first2;
}
return result;
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class Compare>
OutputIterator set_intersection(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first1, *first2))
++first1;
else if (comp(*first2, *first1))
++first2;
else {
*result++ = *first1++;
++first2;
}
return result;
}
template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator set_difference(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result) {
while (first1 != last1 && first2 != last2)
if (*first1 < *first2)
*result++ = *first1++;
else if (*first2 < *first1)
++first2;
else {
++first1;
++first2;
}
return copy(first1, last1, result);
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class Compare>
OutputIterator set_difference(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
OutputIterator result, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first1, *first2))
*result++ = *first1++;
else if (comp(*first2, *first1))
++first2;
else {
++first1;
++first2;
}
return copy(first1, last1, result);
}
template <class InputIterator1, class InputIterator2, class OutputIterator>
OutputIterator set_symmetric_difference(InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2,
InputIterator2 last2,
OutputIterator result) {
while (first1 != last1 && first2 != last2)
if (*first1 < *first2)
*result++ = *first1++;
else if (*first2 < *first1)
*result++ = *first2++;
else {
++first1;
++first2;
}
return copy(first2, last2, copy(first1, last1, result));
}
template <class InputIterator1, class InputIterator2, class OutputIterator,
class Compare>
OutputIterator set_symmetric_difference(InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2,
InputIterator2 last2,
OutputIterator result, Compare comp) {
while (first1 != last1 && first2 != last2)
if (comp(*first1, *first2))
*result++ = *first1++;
else if (comp(*first2, *first1))
*result++ = *first2++;
else {
++first1;
++first2;
}
return copy(first2, last2, copy(first1, last1, result));
}
template <class ForwardIterator>
ForwardIterator max_element(ForwardIterator first, ForwardIterator last) {
if (first == last) return first;
ForwardIterator result = first;
while (++first != last)
if (*result < *first) result = first;
return result;
}
template <class ForwardIterator, class Compare>
ForwardIterator max_element(ForwardIterator first, ForwardIterator last,
Compare comp) {
if (first == last) return first;
ForwardIterator result = first;
while (++first != last)
if (comp(*result, *first)) result = first;
return result;
}
template <class ForwardIterator>
ForwardIterator min_element(ForwardIterator first, ForwardIterator last) {
if (first == last) return first;
ForwardIterator result = first;
while (++first != last)
if (*first < *result) result = first;
return result;
}
template <class ForwardIterator, class Compare>
ForwardIterator min_element(ForwardIterator first, ForwardIterator last,
Compare comp) {
if (first == last) return first;
ForwardIterator result = first;
while (++first != last)
if (comp(*first, *result)) result = first;
return result;
}
template <class BidirectionalIterator>
bool next_permutation(BidirectionalIterator first,
BidirectionalIterator last) {
if (first == last) return false;
BidirectionalIterator i = first;
++i;
if (i == last) return false;
i = last;
--i;
for(;;) {
BidirectionalIterator ii = i--;
if (*i < *ii) {
BidirectionalIterator j = last;
while (!(*i < *--j));
iter_swap(i, j);
reverse(ii, last);
return true;
}
if (i == first) {
reverse(first, last);
return false;
}
}
}
template <class BidirectionalIterator, class Compare>
bool next_permutation(BidirectionalIterator first, BidirectionalIterator last,
Compare comp) {
if (first == last) return false;
BidirectionalIterator i = first;
++i;
if (i == last) return false;
i = last;
--i;
for(;;) {
BidirectionalIterator ii = i--;
if (comp(*i, *ii)) {
BidirectionalIterator j = last;
while (!comp(*i, *--j));
iter_swap(i, j);
reverse(ii, last);
return true;
}
if (i == first) {
reverse(first, last);
return false;
}
}
}
template <class BidirectionalIterator>
bool prev_permutation(BidirectionalIterator first,
BidirectionalIterator last) {
if (first == last) return false;
BidirectionalIterator i = first;
++i;
if (i == last) return false;
i = last;
--i;
for(;;) {
BidirectionalIterator ii = i--;
if (*ii < *i) {
BidirectionalIterator j = last;
while (!(*--j < *i));
iter_swap(i, j);
reverse(ii, last);
return true;
}
if (i == first) {
reverse(first, last);
return false;
}
}
}
template <class BidirectionalIterator, class Compare>
bool prev_permutation(BidirectionalIterator first, BidirectionalIterator last,
Compare comp) {
if (first == last) return false;
BidirectionalIterator i = first;
++i;
if (i == last) return false;
i = last;
--i;
for(;;) {
BidirectionalIterator ii = i--;
if (comp(*ii, *i)) {
BidirectionalIterator j = last;
while (!comp(*--j, *i));
iter_swap(i, j);
reverse(ii, last);
return true;
}
if (i == first) {
reverse(first, last);
return false;
}
}
}
template <class InputIterator, class T>
T accumulate(InputIterator first, InputIterator last, T init) {
while (first != last)
init = init + *first++;
return init;
}
template <class InputIterator, class T, class BinaryOperation>
T accumulate(InputIterator first, InputIterator last, T init,
BinaryOperation binary_op) {
while (first != last)
init = binary_op(init, *first++);
return init;
}
template <class InputIterator1, class InputIterator2, class T>
T inner_product(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, T init) {
while (first1 != last1)
init = init + (*first1++ * *first2++);
return init;
}
template <class InputIterator1, class InputIterator2, class T,
class BinaryOperation1, class BinaryOperation2>
T inner_product(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, T init, BinaryOperation1 binary_op1,
BinaryOperation2 binary_op2) {
while (first1 != last1)
init = binary_op1(init, binary_op2(*first1++, *first2++));
return init;
}
template <class InputIterator, class OutputIterator, class T>
OutputIterator __partial_sum(InputIterator first, InputIterator last,
OutputIterator result, T*) {
T value = *first;
while (++first != last) {
value = value + *first;
*++result = value;
}
return ++result;
}
template <class InputIterator, class OutputIterator>
OutputIterator partial_sum(InputIterator first, InputIterator last,
OutputIterator result) {
if (first == last) return result;
*result = *first;
return __partial_sum(first, last, result, value_type(first));
}
template <class InputIterator, class OutputIterator, class T,
class BinaryOperation>
OutputIterator __partial_sum(InputIterator first, InputIterator last,
OutputIterator result, T*,
BinaryOperation binary_op) {
T value = *first;
while (++first != last) {
value = binary_op(value, *first);
*++result = value;
}
return ++result;
}
template <class InputIterator, class OutputIterator, class BinaryOperation>
OutputIterator partial_sum(InputIterator first, InputIterator last,
OutputIterator result, BinaryOperation binary_op) {
if (first == last) return result;
*result = *first;
return __partial_sum(first, last, result, value_type(first), binary_op);
}
template <class InputIterator, class OutputIterator, class T>
OutputIterator __adjacent_difference(InputIterator first, InputIterator last,
OutputIterator result, T*) {
T value = *first;
while (++first != last) {
T tmp = *first;
*++result = tmp - value;
value = tmp;
}
return ++result;
}
template <class InputIterator, class OutputIterator>
OutputIterator adjacent_difference(InputIterator first, InputIterator last,
OutputIterator result) {
if (first == last) return result;
*result = *first;
return __adjacent_difference(first, last, result, value_type(first));
}
template <class InputIterator, class OutputIterator, class T,
class BinaryOperation>
OutputIterator __adjacent_difference(InputIterator first, InputIterator last,
OutputIterator result, T*,
BinaryOperation binary_op) {
T value = *first;
while (++first != last) {
T tmp = *first;
*++result = binary_op(tmp, value);
value = tmp;
}
return ++result;
}
template <class InputIterator, class OutputIterator, class BinaryOperation>
OutputIterator adjacent_difference(InputIterator first, InputIterator last,
OutputIterator result,
BinaryOperation binary_op) {
if (first == last) return result;
*result = *first;
return __adjacent_difference(first, last, result, value_type(first),
binary_op);
}
template <class ForwardIterator, class T>
void iota(ForwardIterator first, ForwardIterator last, T value) {
while (first != last) *first++ = value++;
}
#endif
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