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gcc/libstdc++/stl/algobase.h
Jason Merrill ff893307d0 algo.h, [...]: Update To September 8 SGI release. 
* algo.h, algobase.h, alloc.h, bvector.h, deque.h, hashtable.h,
	iterator.h, list.h, rope.h, ropeimpl.h, slist.h, stl_config.h,
	tree.h, vector.h: Update To September 8 SGI release.

From-SVN: r15211
1997-09-09 22:49:45 -04:00

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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.
*
*
* Copyright (c) 1996
* Silicon Graphics Computer Systems, Inc.
*
* 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. Silicon Graphics makes no
* representations about the suitability of this software for any
* purpose. It is provided "as is" without express or implied warranty.
*/
#ifndef _SGI_STL_ALGOBASE_H
#define _SGI_STL_ALGOBASE_H
#include <string.h>
#include <limits.h>
#include <function.h>
#include <pair.h>
#include <iterator.h>
#include <new.h>
#include <type_traits.h>
template <class ForwardIterator1, class ForwardIterator2, class T>
inline void __iter_swap(ForwardIterator1 a, ForwardIterator2 b, T*) {
T tmp = *a;
*a = *b;
*b = tmp;
}
template <class ForwardIterator1, class ForwardIterator2>
inline void iter_swap(ForwardIterator1 a, ForwardIterator2 b) {
__iter_swap(a, b, value_type(a));
}
template <class T>
inline void swap(T& a, T& b) {
T tmp = a;
a = b;
b = tmp;
}
#ifdef __BORLANDC__
#include <stdlib.h>
#else
template <class T>
inline const T& min(const T& a, const T& b) {
return b < a ? b : a;
}
template <class T>
inline const T& max(const T& a, const T& b) {
return a < b ? b : a;
}
#endif
template <class T, class Compare>
inline const T& min(const T& a, const T& b, Compare comp) {
return comp(b, a) ? b : a;
}
template <class T, class Compare>
inline const T& max(const T& a, const T& b, Compare comp) {
return comp(a, b) ? b : a;
}
template <class InputIterator, class Distance>
inline void __distance(InputIterator first, InputIterator last, Distance& n,
input_iterator_tag) {
while (first != last) { ++first; ++n; }
}
template <class RandomAccessIterator, class Distance>
inline void __distance(RandomAccessIterator first, RandomAccessIterator last,
Distance& n, random_access_iterator_tag) {
n += last - first;
}
template <class InputIterator, class Distance>
inline void distance(InputIterator first, InputIterator last, Distance& n) {
__distance(first, last, n, iterator_category(first));
}
#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class InputIterator>
inline iterator_traits<InputIterator>::difference_type
__distance(InputIterator first, InputIterator last, input_iterator_tag) {
iterator_traits<InputIterator>::difference_type n = 0;
while (first != last) {
++first; ++n;
}
return n;
}
template <class RandomAccessIterator>
inline iterator_traits<RandomAccessIterator>::difference_type
__distance(RandomAccessIterator first, RandomAccessIterator last,
random_access_iterator_tag) {
return last - first;
}
template <class InputIterator>
inline iterator_traits<InputIterator>::difference_type
distance(InputIterator first, InputIterator last) {
return __distance(first, last,
iterator_traits<InputIterator>::iterator_category());
}
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class InputIterator, class Distance>
inline void __advance(InputIterator& i, Distance n, input_iterator_tag) {
while (n--) ++i;
}
#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma set woff 1183
#endif
template <class BidirectionalIterator, class Distance>
inline void __advance(BidirectionalIterator& i, Distance n,
bidirectional_iterator_tag) {
if (n >= 0)
while (n--) ++i;
else
while (n++) --i;
}
#if defined(__sgi) && !defined(__GNUC__) && (_MIPS_SIM != _MIPS_SIM_ABI32)
#pragma reset woff 1183
#endif
template <class RandomAccessIterator, class Distance>
inline void __advance(RandomAccessIterator& i, Distance n,
random_access_iterator_tag) {
i += n;
}
template <class InputIterator, class Distance>
inline void advance(InputIterator& i, Distance n) {
__advance(i, n, iterator_category(i));
}
template <class InputIterator, class OutputIterator>
inline OutputIterator __copy(InputIterator first, InputIterator last,
OutputIterator result, input_iterator_tag)
{
for ( ; first != last; ++result, ++first)
*result = *first;
return result;
}
template <class RandomAccessIterator, class OutputIterator, class Distance>
inline OutputIterator
__copy_d(RandomAccessIterator first, RandomAccessIterator last,
OutputIterator result, Distance*)
{
for (Distance n = last - first; n > 0; --n, ++result, ++first)
*result = *first;
return result;
}
template <class RandomAccessIterator, class OutputIterator>
inline OutputIterator
__copy(RandomAccessIterator first, RandomAccessIterator last,
OutputIterator result, random_access_iterator_tag)
{
return __copy_d(first, last, result, distance_type(first));
}
template <class InputIterator, class OutputIterator>
struct __copy_dispatch
{
OutputIterator operator()(InputIterator first, InputIterator last,
OutputIterator result) {
return __copy(first, last, result, iterator_category(first));
}
};
#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class T>
inline T* __copy_t(const T* first, const T* last, T* result, __true_type) {
memmove(result, first, sizeof(T) * (last - first));
return result + (last - first);
}
template <class T>
inline T* __copy_t(const T* first, const T* last, T* result, __false_type) {
return __copy_d(first, last, result, (ptrdiff_t*) 0);
}
template <class T>
struct __copy_dispatch<T*, T*>
{
T* operator()(T* first, T* last, T* result) {
return __copy_t(first, last, result,
__type_traits<T>::has_trivial_assignment_operator());
}
};
template <class T>
struct __copy_dispatch<const T*, T*>
{
T* operator()(const T* first, const T* last, T* result) {
return __copy_t(first, last, result,
__type_traits<T>::has_trivial_assignment_operator());
}
};
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class InputIterator, class OutputIterator>
inline OutputIterator copy(InputIterator first, InputIterator last,
OutputIterator result)
{
return __copy_dispatch<InputIterator,OutputIterator>()(first, last, result);
}
inline char* copy(const char* first, const char* last, char* result) {
memmove(result, first, last - first);
return result + (last - first);
}
inline wchar_t* copy(const wchar_t* first, const wchar_t* last,
wchar_t* result) {
memmove(result, first, sizeof(wchar_t) * (last - first));
return result + (last - first);
}
template <class BidirectionalIterator1, class BidirectionalIterator2>
inline BidirectionalIterator2 __copy_backward(BidirectionalIterator1 first,
BidirectionalIterator1 last,
BidirectionalIterator2 result) {
while (first != last) *--result = *--last;
return result;
}
template <class BidirectionalIterator1, class BidirectionalIterator2>
struct __copy_backward_dispatch
{
BidirectionalIterator2 operator()(BidirectionalIterator1 first,
BidirectionalIterator1 last,
BidirectionalIterator2 result) {
return __copy_backward(first, last, result);
}
};
#ifdef __STL_CLASS_PARTIAL_SPECIALIZATION
template <class T>
inline T* __copy_backward_t(const T* first, const T* last, T* result,
__true_type) {
const ptrdiff_t N = last - first;
memmove(result - N, first, sizeof(T) * N);
return result - N;
}
template <class T>
inline T* __copy_backward_t(const T* first, const T* last, T* result,
__false_type) {
return __copy_backward(first, last, result);
}
template <class T>
struct __copy_backward_dispatch<T*, T*>
{
T* operator()(T* first, T* last, T* result) {
return
__copy_backward_t(first, last, result,
__type_traits<T>::has_trivial_assignment_operator());
}
};
template <class T>
struct __copy_backward_dispatch<const T*, T*>
{
T* operator()(const T* first, const T* last, T* result) {
return
__copy_backward_t(first, last, result,
__type_traits<T>::has_trivial_assignment_operator());
}
};
#endif /* __STL_CLASS_PARTIAL_SPECIALIZATION */
template <class BidirectionalIterator1, class BidirectionalIterator2>
inline BidirectionalIterator2 copy_backward(BidirectionalIterator1 first,
BidirectionalIterator1 last,
BidirectionalIterator2 result) {
return __copy_backward_dispatch<BidirectionalIterator1,
BidirectionalIterator2>()(first, last,
result);
}
template <class InputIterator, class Size, class OutputIterator>
OutputIterator __copy_n(InputIterator first, Size count,
OutputIterator result,
input_iterator_tag) {
for ( ; count > 0; --count, ++first, ++result)
*result = *first;
return result;
}
template <class RandomAccessIterator, class Size, class OutputIterator>
inline OutputIterator __copy_n(RandomAccessIterator first, Size count,
OutputIterator result,
random_access_iterator_tag) {
return copy(first, first + count, result);
}
template <class InputIterator, class Size, class OutputIterator>
inline OutputIterator copy_n(InputIterator first, Size count,
OutputIterator result) {
return __copy_n(first, count, result, iterator_category(first));
}
template <class ForwardIterator, class T>
void fill(ForwardIterator first, ForwardIterator last, const T& value) {
for ( ; first != last; ++first)
*first = value;
}
template <class OutputIterator, class Size, class T>
OutputIterator fill_n(OutputIterator first, Size n, const T& value) {
for ( ; n > 0; --n, ++first)
*first = value;
return first;
}
template <class InputIterator1, class InputIterator2>
pair<InputIterator1, InputIterator2> mismatch(InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2) {
while (first1 != last1 && *first1 == *first2) {
++first1;
++first2;
}
return pair<InputIterator1, InputIterator2>(first1, first2);
}
template <class InputIterator1, class InputIterator2, class BinaryPredicate>
pair<InputIterator1, InputIterator2> mismatch(InputIterator1 first1,
InputIterator1 last1,
InputIterator2 first2,
BinaryPredicate binary_pred) {
while (first1 != last1 && binary_pred(*first1, *first2)) {
++first1;
++first2;
}
return pair<InputIterator1, InputIterator2>(first1, first2);
}
template <class InputIterator1, class InputIterator2>
inline bool equal(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2) {
for ( ; first1 != last1; ++first1, ++first2)
if (*first1 != *first2)
return false;
return true;
}
template <class InputIterator1, class InputIterator2, class BinaryPredicate>
inline bool equal(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, BinaryPredicate binary_pred) {
for ( ; first1 != last1; ++first1, ++first2)
if (!binary_pred(*first1, *first2))
return false;
return true;
}
template <class InputIterator1, class InputIterator2>
bool lexicographical_compare(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2) {
for ( ; first1 != last1 && first2 != last2; ++first1, ++first2) {
if (*first1 < *first2)
return true;
if (*first2 < *first1)
return false;
}
return first1 == last1 && first2 != last2;
}
template <class InputIterator1, class InputIterator2, class Compare>
bool lexicographical_compare(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
Compare comp) {
for ( ; first1 != last1 && first2 != last2; ++first1, ++first2) {
if (comp(*first1, *first2))
return true;
if (comp(*first2, *first1))
return false;
}
return first1 == last1 && first2 != last2;
}
inline bool
lexicographical_compare(const unsigned char* first1,
const unsigned char* last1,
const unsigned char* first2,
const unsigned char* last2)
{
const size_t len1 = last1 - first1;
const size_t len2 = last2 - first2;
const int result = memcmp(first1, first2, min(len1, len2));
return result != 0 ? result < 0 : len1 < len2;
}
inline bool lexicographical_compare(const char* first1, const char* last1,
const char* first2, const char* last2)
{
#if CHAR_MAX == SCHAR_MAX
return lexicographical_compare((const signed char*) first1,
(const signed char*) last1,
(const signed char*) first2,
(const signed char*) last2);
#else
return lexicographical_compare((const unsigned char*) first1,
(const unsigned char*) last1,
(const unsigned char*) first2,
(const unsigned char*) last2);
#endif
}
template <class InputIterator1, class InputIterator2>
int lexicographical_compare_3way(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2)
{
while (first1 != last1 && first2 != last2) {
if (*first1 < *first2) return -1;
if (*first2 < *first1) return 1;
++first1; ++first2;
}
if (first2 == last2) {
return !(first1 == last1);
} else {
return -1;
}
}
inline int
lexicographical_compare_3way(const unsigned char* first1,
const unsigned char* last1,
const unsigned char* first2,
const unsigned char* last2)
{
const int len1 = last1 - first1;
const int len2 = last2 - first2;
const int result = memcmp(first1, first2, min(len1, len2));
return result == 0 ? len1 - len2 : result;
}
inline int lexicographical_compare_3way(const char* first1, const char* last1,
const char* first2, const char* last2)
{
#if CHAR_MAX == SCHAR_MAX
return lexicographical_compare_3way(
(const signed char*) first1,
(const signed char*) last1,
(const signed char*) first2,
(const signed char*) last2);
#else
return lexicographical_compare_3way((const unsigned char*) first1,
(const unsigned char*) last1,
(const unsigned char*) first2,
(const unsigned char*) last2);
#endif
}
template <class T>
inline void destroy(T* pointer) {
pointer->~T();
}
template <class T1, class T2>
inline void construct(T1* p, const T2& value) {
new (p) T1(value);
}
template <class ForwardIterator>
inline void
__destroy_aux(ForwardIterator first, ForwardIterator last, __false_type) {
for ( ; first < last; ++first)
destroy(&*first);
}
template <class ForwardIterator>
inline void __destroy_aux(ForwardIterator, ForwardIterator, __true_type) {
}
template <class ForwardIterator, class T>
inline void __destroy(ForwardIterator first, ForwardIterator last, T*) {
__destroy_aux(first, last, __type_traits<T>::has_trivial_destructor());
}
template <class ForwardIterator>
inline void destroy(ForwardIterator first, ForwardIterator last) {
__destroy(first, last, value_type(first));
}
inline void destroy(char*, char*) {}
inline void destroy(wchar_t*, wchar_t*) {}
// Valid if copy construction is equivalent to assignment, and if the
// destructor is trivial.
template <class InputIterator, class ForwardIterator>
inline ForwardIterator
__uninitialized_copy_aux(InputIterator first, InputIterator last,
ForwardIterator result,
__true_type) {
return copy(first, last, result);
}
template <class InputIterator, class ForwardIterator>
ForwardIterator
__uninitialized_copy_aux(InputIterator first, InputIterator last,
ForwardIterator result,
__false_type) {
ForwardIterator cur = result;
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
for ( ; first != last; ++first, ++cur)
construct(&*cur, *first);
return cur;
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(result, cur);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
template <class InputIterator, class ForwardIterator, class T>
inline ForwardIterator
__uninitialized_copy(InputIterator first, InputIterator last,
ForwardIterator result, T*) {
return __uninitialized_copy_aux(first, last, result,
__type_traits<T>::is_POD_type());
}
template <class InputIterator, class ForwardIterator>
inline ForwardIterator
uninitialized_copy(InputIterator first, InputIterator last,
ForwardIterator result) {
return __uninitialized_copy(first, last, result, value_type(result));
}
inline char* uninitialized_copy(const char* first, const char* last,
char* result) {
memmove(result, first, last - first);
return result + (last - first);
}
inline wchar_t* uninitialized_copy(const wchar_t* first, const wchar_t* last,
wchar_t* result) {
memmove(result, first, sizeof(wchar_t) * (last - first));
return result + (last - first);
}
template <class InputIterator, class Size, class ForwardIterator>
ForwardIterator __uninitialized_copy_n(InputIterator first, Size count,
ForwardIterator result,
input_iterator_tag) {
ForwardIterator cur = result;
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
for ( ; count > 0 ; --count, ++first, ++cur)
construct(&*cur, *first);
return cur;
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(result, cur);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
template <class RandomAccessIterator, class Size, class ForwardIterator>
inline ForwardIterator
__uninitialized_copy_n(RandomAccessIterator first, Size count,
ForwardIterator result,
random_access_iterator_tag) {
return uninitialized_copy(first, first + count, result);
}
template <class InputIterator, class Size, class ForwardIterator>
inline ForwardIterator uninitialized_copy_n(InputIterator first, Size count,
ForwardIterator result) {
return __uninitialized_copy_n(first, count, result,
iterator_category(first));
}
// Valid if copy construction is equivalent to assignment, and if the
// destructor is trivial.
template <class ForwardIterator, class T>
inline void
__uninitialized_fill_aux(ForwardIterator first, ForwardIterator last,
const T& x, __true_type)
{
fill(first, last, x);
}
template <class ForwardIterator, class T>
void
__uninitialized_fill_aux(ForwardIterator first, ForwardIterator last,
const T& x, __false_type)
{
ForwardIterator cur = first;
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
for ( ; cur != last; ++cur)
construct(&*cur, x);
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(first, cur);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
template <class ForwardIterator, class T, class T1>
inline void __uninitialized_fill(ForwardIterator first, ForwardIterator last,
const T& x, T1*) {
__uninitialized_fill_aux(first, last, x,
__type_traits<T1>::is_POD_type());
}
template <class ForwardIterator, class T>
inline void uninitialized_fill(ForwardIterator first, ForwardIterator last,
const T& x) {
__uninitialized_fill(first, last, x, value_type(first));
}
// Valid if copy construction is equivalent to assignment, and if the
// destructor is trivial.
template <class ForwardIterator, class Size, class T>
inline ForwardIterator
__uninitialized_fill_n_aux(ForwardIterator first, Size n,
const T& x, __true_type) {
return fill_n(first, n, x);
}
template <class ForwardIterator, class Size, class T>
ForwardIterator
__uninitialized_fill_n_aux(ForwardIterator first, Size n,
const T& x, __false_type) {
ForwardIterator cur = first;
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
for ( ; n > 0; --n, ++cur)
construct(&*cur, x);
return cur;
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(first, cur);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
template <class ForwardIterator, class Size, class T, class T1>
inline ForwardIterator __uninitialized_fill_n(ForwardIterator first, Size n,
const T& x, T1*) {
return __uninitialized_fill_n_aux(first, n, x,
__type_traits<T1>::is_POD_type());
}
template <class ForwardIterator, class Size, class T>
inline ForwardIterator uninitialized_fill_n(ForwardIterator first, Size n,
const T& x) {
return __uninitialized_fill_n(first, n, x, value_type(first));
}
// Copies [first1, last1) into [result, result + (last1 - first1)), and
// copies [first2, last2) into
// [result, result + (last1 - first1) + (last2 - first2)).
template <class InputIterator1, class InputIterator2, class ForwardIterator>
inline ForwardIterator
__uninitialized_copy_copy(InputIterator1 first1, InputIterator1 last1,
InputIterator2 first2, InputIterator2 last2,
ForwardIterator result) {
ForwardIterator mid = uninitialized_copy(first1, last1, result);
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
return uninitialized_copy(first2, last2, mid);
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(result, mid);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
// Fills [result, mid) with x, and copies [first, last) into
// [mid, mid + (last - first)).
template <class ForwardIterator, class T, class InputIterator>
inline ForwardIterator
__uninitialized_fill_copy(ForwardIterator result, ForwardIterator mid,
const T& x,
InputIterator first, InputIterator last) {
uninitialized_fill(result, mid, x);
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
return uninitialized_copy(first, last, mid);
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(result, mid);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
// Copies [first1, last1) into [first2, first2 + (last1 - first1)), and
// fills [first2 + (last1 - first1), last2) with x.
template <class InputIterator, class ForwardIterator, class T>
inline void
__uninitialized_copy_fill(InputIterator first1, InputIterator last1,
ForwardIterator first2, ForwardIterator last2,
const T& x) {
ForwardIterator mid2 = uninitialized_copy(first1, last1, first2);
# ifdef __STL_USE_EXCEPTIONS
try {
# endif /* __STL_USE_EXCEPTIONS */
uninitialized_fill(mid2, last2, x);
# ifdef __STL_USE_EXCEPTIONS
}
catch(...) {
destroy(first2, mid2);
throw;
}
# endif /* __STL_USE_EXCEPTIONS */
}
#endif /* _SGI_STL_ALGOBASE_H */
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