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Diffstat (limited to 'libstdc++-v3/bits/stl_numeric.h')
-rw-r--r-- | libstdc++-v3/bits/stl_numeric.h | 239 |
1 files changed, 239 insertions, 0 deletions
diff --git a/libstdc++-v3/bits/stl_numeric.h b/libstdc++-v3/bits/stl_numeric.h new file mode 100644 index 0000000..7070e2d --- /dev/null +++ b/libstdc++-v3/bits/stl_numeric.h @@ -0,0 +1,239 @@ +/* + * + * 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 _CPP_BITS_STL_NUMERIC_H +#define _CPP_BITS_STL_NUMERIC_H 1 + +__STL_BEGIN_NAMESPACE + +template <class _InputIterator, class _Tp> +_Tp accumulate(_InputIterator __first, _InputIterator __last, _Tp __init) +{ + for ( ; __first != __last; ++__first) + __init = __init + *__first; + return __init; +} + +template <class _InputIterator, class _Tp, class _BinaryOperation> +_Tp accumulate(_InputIterator __first, _InputIterator __last, _Tp __init, + _BinaryOperation __binary_op) +{ + for ( ; __first != __last; ++__first) + __init = __binary_op(__init, *__first); + return __init; +} + +template <class _InputIterator1, class _InputIterator2, class _Tp> +_Tp inner_product(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _Tp __init) +{ + for ( ; __first1 != __last1; ++__first1, ++__first2) + __init = __init + (*__first1 * *__first2); + return __init; +} + +template <class _InputIterator1, class _InputIterator2, class _Tp, + class _BinaryOperation1, class _BinaryOperation2> +_Tp inner_product(_InputIterator1 __first1, _InputIterator1 __last1, + _InputIterator2 __first2, _Tp __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 _Tp> +_OutputIterator +__partial_sum(_InputIterator __first, _InputIterator __last, + _OutputIterator __result, _Tp*) +{ + _Tp __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 _Tp, + class _BinaryOperation> +_OutputIterator +__partial_sum(_InputIterator __first, _InputIterator __last, + _OutputIterator __result, _Tp*, _BinaryOperation __binary_op) +{ + _Tp __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 _Tp> +_OutputIterator +__adjacent_difference(_InputIterator __first, _InputIterator __last, + _OutputIterator __result, _Tp*) +{ + _Tp __value = *__first; + while (++__first != __last) { + _Tp __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 _Tp, + class _BinaryOperation> +_OutputIterator +__adjacent_difference(_InputIterator __first, _InputIterator __last, + _OutputIterator __result, _Tp*, + _BinaryOperation __binary_op) { + _Tp __value = *__first; + while (++__first != __last) { + _Tp __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 _Tp, class _Integer, class _MonoidOperation> +_Tp __power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op) +{ + if (__n == 0) + return identity_element(__monoid_op); + else { + while ((__n & 1) == 0) { + __n >>= 1; + __x = __monoid_op(__x, __x); + } + + _Tp __result = __x; + __n >>= 1; + while (__n != 0) { + __x = __monoid_op(__x, __x); + if ((__n & 1) != 0) + __result = __monoid_op(__result, __x); + __n >>= 1; + } + return __result; + } +} + +template <class _Tp, class _Integer> +inline _Tp __power(_Tp __x, _Integer __n) +{ + return __power(__x, __n, multiplies<_Tp>()); +} + +// Alias for the internal name __power. Note that power is an extension, +// not part of the C++ standard. + +template <class _Tp, class _Integer, class _MonoidOperation> +inline _Tp power(_Tp __x, _Integer __n, _MonoidOperation __monoid_op) +{ + return __power(__x, __n, __monoid_op); +} + +template <class _Tp, class _Integer> +inline _Tp power(_Tp __x, _Integer __n) +{ + return __power(__x, __n); +} + +// iota is not part of the C++ standard. It is an extension. + +template <class _ForwardIterator, class _Tp> +void +iota(_ForwardIterator __first, _ForwardIterator __last, _Tp __value) +{ + while (__first != __last) + *__first++ = __value++; +} + +__STL_END_NAMESPACE + +#endif /* _CPP_BITS_STL_NUMERIC_H */ + +// Local Variables: +// mode:C++ +// End: |