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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) 1996,1997
* 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.
*/
/* NOTE: This is an internal header file, included by other STL headers.
* You should not attempt to use it directly.
*/
#ifndef __SGI_STL_INTERNAL_NUMERIC_H
#define __SGI_STL_INTERNAL_NUMERIC_H
__STL_BEGIN_NAMESPACE
template <class InputIterator, class T>
T accumulate(InputIterator first, InputIterator last, T init) {
for ( ; first != last; ++first)
init = init + *first;
return init;
}
template <class InputIterator, class T, class BinaryOperation>
T accumulate(InputIterator first, InputIterator last, T init,
BinaryOperation binary_op) {
for ( ; first != last; ++first)
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) {
for ( ; first1 != last1; ++first1, ++first2)
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) {
for ( ; first1 != last1; ++first1, ++first2)
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);
}
// Returns x ** n, where n >= 0. Note that "multiplication"
// is required to be associative, but not necessarily commutative.
template <class T, class Integer, class MonoidOperation>
T power(T x, Integer n, MonoidOperation op) {
if (n == 0)
return identity_element(op);
else {
while ((n & 1) == 0) {
n >>= 1;
x = op(x, x);
}
T result = x;
n >>= 1;
while (n != 0) {
x = op(x, x);
if ((n & 1) != 0)
result = op(result, x);
n >>= 1;
}
return result;
}
}
template <class T, class Integer>
inline T power(T x, Integer n) {
return power(x, n, multiplies<T>());
}
template <class ForwardIterator, class T>
void iota(ForwardIterator first, ForwardIterator last, T value) {
while (first != last) *first++ = value++;
}
__STL_END_NAMESPACE
#endif /* __SGI_STL_INTERNAL_NUMERIC_H */
// Local Variables:
// mode:C++
// End:
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