454 lines
14 KiB
C++
454 lines
14 KiB
C++
/***************************************************************************
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*
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* 25.rotate.cpp - test exercising 25.2.10 [lib.alg.rotate]
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*
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* $Id: 25.rotate.cpp 510970 2007-02-23 14:57:45Z faridz $
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*
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***************************************************************************
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* permissions and limitations under the License.
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*
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* Copyright 1994-2006 Rogue Wave Software.
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*
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**************************************************************************/
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#include <algorithm> // for rotate, rotate_copy
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#include <cstring> // for size_t, strlen()
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#include <alg_test.h>
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#include <rw_value.h> // for UserClass
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#include <driver.h> // for rw_test()
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_RWSTD_NAMESPACE (std) {
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// disable explicit instantiation for compilers (like MSVC)
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// that can't handle it
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#ifndef _RWSTD_NO_EXPLICIT_INSTANTIATION
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template
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void
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rotate (FwdIter<assign<base<cpy_ctor> > >,
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FwdIter<assign<base<cpy_ctor> > >,
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FwdIter<assign<base<cpy_ctor> > >);
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template
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OutputIter<assign<base<cpy_ctor> > >
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rotate_copy (FwdIter<assign<base<cpy_ctor> > >,
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FwdIter<assign<base<cpy_ctor> > >,
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FwdIter<assign<base<cpy_ctor> > >,
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OutputIter<assign<base<cpy_ctor> > >);
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#endif // _RWSTD_NO_EXPLICIT_INSTANTIATION
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} // namespace std
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/**************************************************************************/
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// tags to select rotate or rotate_copy at compile time
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struct RotateTag {
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enum { fname_inx = 0 };
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int dummy;
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};
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struct RotateCopyTag {
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enum { fname_inx = 1 };
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int dummy;
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};
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// used as a dummy template argument to test functions exercising rotate()
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// (to differentiate from rotate_copy())
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struct NoIterator { };
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const char* type_name (NoIterator, const UserClass*)
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{
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return 0;
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}
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/**************************************************************************/
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unsigned iter_swap_calls;
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_RWSTD_NAMESPACE (std) {
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_RWSTD_SPECIALIZED_FUNCTION
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void iter_swap (FwdIter<UserClass> i, FwdIter<UserClass> j)
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{
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++iter_swap_calls;
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const int tmp = (*i).data_.val_;
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(*i).data_.val_ = (*j).data_.val_;
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(*j).data_.val_ = tmp;
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}
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_RWSTD_SPECIALIZED_FUNCTION
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void iter_swap (BidirIter<UserClass> i, BidirIter<UserClass> j)
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{
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++iter_swap_calls;
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const int tmp = (*i).data_.val_;
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(*i).data_.val_ = (*j).data_.val_;
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(*j).data_.val_ = tmp;
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}
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_RWSTD_SPECIALIZED_FUNCTION
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void iter_swap (RandomAccessIter<UserClass> i, RandomAccessIter<UserClass> j)
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{
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++iter_swap_calls;
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const int tmp = (*i).data_.val_;
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(*i).data_.val_ = (*j).data_.val_;
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(*j).data_.val_ = tmp;
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}
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} // namespace std
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/**************************************************************************/
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// exercises std::rotate()
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template <class Iterator, class T>
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void test_rotate (int line,
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const char *src,
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std::size_t midnsrc,
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Iterator it, NoIterator, const T*, RotateTag)
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{
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static const char* const itname = type_name (it, (T*)0);
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const char* const fname = "rotate";
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// compute the length of the source sequence
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const std::size_t nsrc = std::strlen (src);
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// construct a sequence of `nsrc' elements to pass to reverse
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T* const xsrc = T::from_char (src, nsrc);
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// construct iterators pointing to the beginning and end
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// of the source sequence
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const Iterator first = make_iter (xsrc, xsrc, xsrc + nsrc, it);
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const Iterator middle = make_iter (xsrc + midnsrc, xsrc, xsrc + nsrc, it);
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const Iterator last = make_iter (xsrc + nsrc, xsrc, xsrc + nsrc, it);
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// zero out the iter_swap() call counter
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iter_swap_calls = 0;
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// call rotate()
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std::rotate (first, middle, last);
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bool success = true;
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std::size_t i = 0;
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std::size_t xpos = 0;
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// verify that the sequence was correctly reversed and that it was
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// done by swapping elements i.e., not simply by copying them over
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for ( ; i != nsrc; ++i) {
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xpos = (i + (nsrc - midnsrc)) % nsrc;
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typedef unsigned char UChar;
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success = UChar (src [i]) == xsrc [xpos].data_.val_;
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if (!success)
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break;
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}
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rw_assert (success, 0, line,
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"line %d: %s<%s>(\"%s\", %zu, ...) ==> "
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"\"%{X=*.*}\"; unexpected element value %#c at %zu",
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__LINE__, fname, itname, src, midnsrc,
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int (nsrc), int (i), xsrc, xsrc [xpos].data_.val_, i);
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success = iter_swap_calls <= nsrc;
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rw_assert (success, 0, line,
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"line %d: %s<%s>(\"%s\", %zu, ...); called iter_swap() "
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"%zu times, expected no more than %zu",
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__LINE__, fname, itname, src, midnsrc,
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iter_swap_calls, nsrc);
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delete[] xsrc;
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}
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/**************************************************************************/
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// exercises std::rotate_copy()
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template <class Iterator, class OutputIterator, class T>
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void test_rotate (int line,
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const char *src,
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std::size_t midnsrc,
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Iterator it, OutputIterator dummy,
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const T*, RotateCopyTag)
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{
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static const char* const it1name = type_name (it, (T*)0);
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static const char* const it2name = type_name (dummy, (T*)0);
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const char* const fname = "rotate_copy";
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const std::size_t nsrc = std::strlen (src);
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T* const xsrc = T::from_char (src, nsrc);
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T* const xdst = T::from_char (src, nsrc);
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const Iterator first (xsrc, xsrc, xsrc + nsrc);
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const Iterator middle (xsrc + midnsrc, xsrc, xsrc + nsrc);
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const Iterator last (xsrc + nsrc, xsrc, xsrc + nsrc);
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const OutputIterator result (xdst, xdst, xdst + nsrc);
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std::size_t last_n_op_assign = T::n_total_op_assign_;
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const OutputIterator end = std::rotate_copy (first, middle, last, result);
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// verify that the returned iterator is set as expected
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bool success = end.cur_ == result.cur_ + nsrc;
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rw_assert (success, 0, line,
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"line %d: %s<%s, %s>(\"%s\", %zu, ...) == result + %zu, got %td",
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__LINE__, fname, it1name, it2name, src, midnsrc,
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nsrc, end.cur_ - xdst);
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// verify that the sequence was correctly rotated
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std::size_t i = 0;
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std::size_t xpos = 0;
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for ( ; i != nsrc; ++i) {
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xpos = (i + (nsrc - midnsrc)) % nsrc;
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typedef unsigned char UChar;
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success = UChar (src [i]) == xdst [xpos].data_.val_;
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if (!success)
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break;
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}
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rw_assert (success, 0, line,
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"line %d: %s<%s, %s>(\"%s\", %zu, ...) ==> "
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"\"%{X=*.*}\"; unexpected element value %#c at %zu",
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__LINE__, fname, it1name, it2name, src, midnsrc,
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int (nsrc), int (i), xsrc, xdst [xpos].data_.val_, i);
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success = T::n_total_op_assign_ - last_n_op_assign == nsrc;
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rw_assert (success, 0, line,
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"line %d: %s<%s, %s>(\"%s\", %zu, ...); called operator=() "
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"%zu times, %zu expected",
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__LINE__, fname, it1name, it2name, src, midnsrc,
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T::n_total_op_assign_ - last_n_op_assign, nsrc);
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delete[] xsrc;
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delete[] xdst;
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}
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/**************************************************************************/
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// exercises all two function templates
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template <class Iterator1, class Iterator2, class T, class Tag>
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void test_rotate (Iterator1 it1, Iterator2 it2, const T*, Tag tag)
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{
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static const char* const it1name = type_name (it1, (T*)0);
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static const char* const it2name = type_name (it2, (T*)0);
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if (tag.fname_inx) { // rotate_copy()
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rw_info (0, 0, 0,
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"std::rotate_copy (%s, %1$s, %1$s, %s)",
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it1name, it2name);
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}
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else { // reverse, rotate()
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rw_info (0, 0, 0,
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"std::rotate (%s, %1$s, %1$s)",
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it1name);
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}
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#define TEST(src, middle) \
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test_rotate (__LINE__, src, middle, it1, it2, (T*)0, tag)
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TEST ("", 0);
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TEST ("a", 0);
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TEST ("ab", 1);
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TEST ("abc", 1);
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TEST ("abcd", 2);
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TEST ("abcde", 2);
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TEST ("abcdef", 3);
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TEST ("abcdefg", 3);
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TEST ("abcdefgh", 4);
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TEST ("abcdefghi", 4);
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TEST ("abcdefghij", 5);
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TEST ("abcdefghijk", 0);
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TEST ("abcdefghijk", 1);
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TEST ("abcdefghijk", 2);
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TEST ("abcdefghijk", 3);
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TEST ("abcdefghijk", 4);
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TEST ("abcdefghijk", 5);
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TEST ("abcdefghijk", 6);
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TEST ("abcdefghijk", 7);
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TEST ("abcdefghijk", 8);
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TEST ("abcdefghijk", 9);
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TEST ("abcdefghijk", 10);
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}
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/**************************************************************************/
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/* extern */ int rw_opt_no_rotate; // --no-rotate
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/* extern */ int rw_opt_no_rotate_copy; // --no-rotate_copy
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/* extern */ int rw_opt_no_output_iter; // --no-OutputIterator
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/* extern */ int rw_opt_no_fwd_iter; // --no-ForwardIterator
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/* extern */ int rw_opt_no_bidir_iter; // --no-BidirectionalIterator
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/* extern */ int rw_opt_no_rnd_iter; // --no-RandomAccessIterator
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template <class T, class Tag>
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void test_rotate (const T*, Tag tag)
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{
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rw_info (0, 0, 0,
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"template <class %s> std::rotate (%1$s, %1$s, %1$s)",
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"ForwardIterator");
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if (rw_opt_no_fwd_iter) {
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rw_note (0, __FILE__, __LINE__, "ForwardIterator test disabled");
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}
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else {
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test_rotate (FwdIter<T>(), NoIterator (), (T*)0, tag);
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}
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if (rw_opt_no_bidir_iter) {
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rw_note (0, __FILE__, __LINE__, "BidirectionalIterator test disabled");
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}
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else {
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test_rotate (BidirIter<T>(), NoIterator (), (T*)0, tag);
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}
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if (rw_opt_no_rnd_iter) {
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rw_note (0, __FILE__, __LINE__, "RandomAccessIterator test disabled");
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}
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else {
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test_rotate (RandomAccessIter<T>(), NoIterator (), (T*)0, tag);
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}
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}
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/**************************************************************************/
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template <class RotateIterator, class T, class Tag>
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void test_rotate_copy (RotateIterator it, const T*, Tag tag)
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{
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if (rw_opt_no_output_iter) {
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rw_note (0, __FILE__, __LINE__, "OutputIterator test disabled");
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}
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else {
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test_rotate (it, OutputIter<T>(0, 0, 0), (T*)0, tag);
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}
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if (rw_opt_no_fwd_iter) {
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rw_note (0, __FILE__, __LINE__, "ForwardIterator test disabled");
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}
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else {
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test_rotate (it, FwdIter<T>(), (T*)0, tag);
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}
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if (rw_opt_no_bidir_iter) {
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rw_note (0, __FILE__, __LINE__, "BidirectionalIterator test disabled");
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}
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else {
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test_rotate (it, BidirIter<T>(), (T*)0, tag);
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}
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if (rw_opt_no_rnd_iter) {
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rw_note (0, __FILE__, __LINE__, "RandomAccessIterator test disabled");
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}
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else {
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test_rotate (it, RandomAccessIter<T>(), (T*)0, tag);
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}
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}
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/**************************************************************************/
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template <class T, class Tag>
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void test_rotate_copy(const T*, Tag tag)
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{
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rw_info (0, 0, 0,
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"template <class %s, class %s> %2$s "
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"std::rotate_copy (%1$s, %1$s, %1$s, %2$s)",
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"ForwardIterator", "OutputIterator");
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if (rw_opt_no_fwd_iter) {
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rw_note (0, __FILE__, __LINE__, "ForwardIterator test disabled");
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}
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else {
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test_rotate_copy (ConstFwdIter<T>(), (T*)0, tag);
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}
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if (rw_opt_no_bidir_iter) {
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rw_note (0, __FILE__, __LINE__, "BidirectionalIterator test disabled");
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}
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else {
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test_rotate_copy (ConstBidirIter<T>(), (T*)0, tag);
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}
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if (rw_opt_no_rnd_iter) {
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rw_note (0, __FILE__, __LINE__, "RandomAccessIterator test disabled");
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}
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else {
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test_rotate_copy (ConstRandomAccessIter<T>(), (T*)0, tag);
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}
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}
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/**************************************************************************/
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static int
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run_test (int, char*[])
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{
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const RotateTag rotate_tag = { false };
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const RotateCopyTag rotate_copy_tag = { true };
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if (rw_opt_no_rotate) {
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rw_note (0, __FILE__, __LINE__, "std::rotate test disabled");
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}
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else {
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test_rotate((UserClass*)0, rotate_tag);
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}
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if (rw_opt_no_rotate_copy) {
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rw_note (0, __FILE__, __LINE__, "std::rotate_copy test disabled");
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}
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else {
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test_rotate_copy((UserClass*)0, rotate_copy_tag);
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}
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return 0;
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}
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/**************************************************************************/
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int main (int argc, char *argv[])
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{
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return rw_test (argc, argv, __FILE__,
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"lib.alg.rotate",
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0 /* no comment */, run_test,
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"|-no-rotate# "
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"|-no-rotate_copy# "
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"|-no-OutputIterator# "
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"|-no-ForwardIterator# "
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"|-no-BidirectionalIterator# "
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"|-no-RandomAccessIterator#",
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&rw_opt_no_rotate,
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&rw_opt_no_rotate_copy,
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&rw_opt_no_output_iter,
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&rw_opt_no_fwd_iter,
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&rw_opt_no_bidir_iter,
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&rw_opt_no_rnd_iter);
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}
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