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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: