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From se...@apache.org
Subject svn commit: r372397 - /incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp
Date Thu, 26 Jan 2006 02:00:43 GMT
Author: sebor
Date: Wed Jan 25 18:00:39 2006
New Revision: 372397

URL: http://svn.apache.org/viewcvs?rev=372397&view=rev
Log:
2006-01-25  Anton Pevtsov  <antonp@moscow.vdiweb.com>
	    Martin Sebor  <sebor@roguewave.com>

	STDCXX-4
	* 25.random.shuffle.cpp: New test exercising lib.alg.random.shuffle
	including STDCXX-126.

Added:
    incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp   (with props)

Added: incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp
URL: http://svn.apache.org/viewcvs/incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp?rev=372397&view=auto
==============================================================================
--- incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp (added)
+++ incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp Wed Jan 25 18:00:39 2006
@@ -0,0 +1,413 @@
+/***************************************************************************
+ *
+ * 25.random.shuffle.cpp - test exercising 25.2.11 [lib.alg.random.shuffle]
+ *
+ * $Id$
+ *
+ ***************************************************************************
+ *
+ * Copyright (c) 1994-2005 Quovadx,  Inc., acting through its  Rogue Wave
+ * Software division. Licensed under the Apache License, Version 2.0 (the
+ * "License");  you may  not use this file except  in compliance with the
+ * License.    You    may   obtain   a   copy   of    the   License    at
+ * http://www.apache.org/licenses/LICENSE-2.0.    Unless   required    by
+ * applicable law  or agreed to  in writing,  software  distributed under
+ * the License is distributed on an "AS IS" BASIS,  WITHOUT WARRANTIES OR
+ * CONDITIONS OF  ANY KIND, either  express or implied.  See  the License
+ * for the specific language governing permissions  and limitations under
+ * the License.
+ * 
+ **************************************************************************/
+
+#include <algorithm>    // for random_shuffle
+#include <cstring>      // for memset(), size_t
+
+#include <alg_test.h>
+#include <driver.h>     // for rw_test()
+
+
+_RWSTD_NAMESPACE (std) { 
+
+// disable explicit instantiation for compilers (like MSVC)
+// that can't handle it
+#ifndef _RWSTD_NO_EXPLICIT_INSTANTIATION
+
+template
+void
+random_shuffle (RandomAccessIter<assign<base<cpy_ctor> > >, 
+                RandomAccessIter<assign<base<cpy_ctor> > >);
+
+template
+void
+random_shuffle (RandomAccessIter<assign<base<cpy_ctor> > >, 
+                RandomAccessIter<assign<base<cpy_ctor> > >,
+                func<const std::size_t >&);
+
+#endif // _RWSTD_NO_EXPLICIT_INSTANTIATION
+
+}   // namespace std
+
+/**************************************************************************/
+
+// 25.2.11, p3 requires that a RandomNumberGenerator take
+// and return a value convertible from and to, respectively,
+// iterator::difference_type
+
+template <class DifferenceType>
+struct Convertible
+{
+    Convertible (DifferenceType val): val_ (val) { }
+    operator DifferenceType () /* non-const */ { return val_; }
+
+private:
+    const DifferenceType val_;
+
+#ifndef _RWSTD_NO_INLINE_MEMBER_TEMPLATES
+
+    template <class T>
+    Convertible (T);
+
+#else   // if defined (_RWSTD_NO_INLINE_MEMBER_TEMPLATES)
+
+    Convertible (unsigned short);
+    Convertible (unsigned);
+    Convertible (unsigned long);
+
+#  ifdef _RWSTD_LONG_LONG
+    Convertible (unsigned _RWSTD_LONG_LONG);
+#  endif   // _RWSTD_LONG_LONG
+#endif   // _RWSTD_NO_INLINE_MEMBER_TEMPLATES
+
+};
+
+// detect assumptions made by the algorithm about the return value
+// from RandomGenerator::operator() being anything but convertible
+// to the iterator's difference type
+template <class DifferenceType, class T>
+void operator+ (Convertible<DifferenceType>, T);
+
+template <class DifferenceType, class T>
+void operator+ (T, Convertible<DifferenceType>);
+
+template <class DifferenceType>
+struct RandomGenerator
+{
+    // dummy arguments to prevent the class from being default
+    // constructible or construtible by conversion from an int
+    RandomGenerator (int, int) {
+        ncalls_ = 0;
+    }
+
+    // non-const in order to detect unwarranted assumptions
+    // in the algorithm(s)
+    Convertible<DifferenceType>
+    operator() (DifferenceType n) /* non-const */ {
+
+        ++ncalls_;
+
+        gen_ = (gen_ << 7) + gen_ % 128;
+
+        return gen_ % n;
+    }
+
+    static std::size_t ncalls_;
+
+private:
+
+#ifndef _RWSTD_NO_INLINE_MEMBER_TEMPLATES
+
+    template <class T>
+    void operator() (T) /* non-const */;
+
+#else   // if defined (_RWSTD_NO_INLINE_MEMBER_TEMPLATES)
+
+    void operator() (unsigned short);
+    void operator() (unsigned);
+    void operator() (unsigned long);
+
+#  ifdef _RWSTD_LONG_LONG
+    void operator() (unsigned _RWSTD_LONG_LONG);
+#  endif   // _RWSTD_LONG_LONG
+#endif   // _RWSTD_NO_INLINE_MEMBER_TEMPLATES
+
+    static DifferenceType gen_;
+};
+
+template <class DifferenceType>
+std::size_t RandomGenerator<DifferenceType>::ncalls_ = 0;
+
+template <class DifferenceType>
+DifferenceType RandomGenerator<DifferenceType>::gen_ = 12345;
+
+/**************************************************************************/
+
+int sequence_start;
+
+int sequence_generator ()
+{
+    return sequence_start++;
+}
+
+/**************************************************************************/
+
+// exercises 25.2.11 -- std::random_shuffle()
+template <class T, class Iterator, class RandomNumberGenerator>
+void test_random_shuffle (const std::size_t            line,
+                          const std::size_t            N,
+                          const Iterator              &it, 
+                          const RandomNumberGenerator*,
+                          const T*,
+                          bool                         rnd_gen)
+{
+    const char* const itname  = type_name (it, (T*)0);
+    const char* const fname   = "random_shuffle";
+    const char* const funname = rnd_gen ? "random_generator" : "";
+
+    rw_info (0, 0, 0,
+             "std::%s (%s, %2$s%{?}, %s%{;})",
+             fname, itname, rnd_gen, funname);
+
+    // generate a sequential value for each default-constructed T
+    // starying with 0 (i.e., T::val_ will be 0 for the first T)
+    sequence_start = 0;
+    T::gen_ = sequence_generator;
+
+    T    *buf   = new T [N];
+    bool *found = new bool [N];
+
+    for (std::size_t i = 0; i < N; ++i) {
+
+        // reset found array to false
+        std::memset (found, 0, N * sizeof *found);
+
+        // create a pair of safe iterator to pass to random_shuffle
+        // in order to test that the function doesn't write past
+        // the end of the sequence [first, last)
+        const Iterator first = make_iter (buf, buf, buf + i + 1, it);
+        const Iterator last  = make_iter (buf + i + 1, buf, buf + i + 1, it);
+
+        /* non-const */ RandomNumberGenerator rnd (0, 0);   // dummy args
+
+        // exercise 25.2.11 - std::random_shuffle<>()
+        std::size_t last_n_op_assign = T::n_total_op_assign_;
+
+        // shuffle buffer elements
+        if (rnd_gen)
+            std::random_shuffle (first, last, rnd);
+        else
+            std::random_shuffle (first, last);
+
+        // verify 25.2.11, p1
+        // iterate over elements of the found array setting those
+        // at the index given by T::val_ to true to verify that
+        // random_shuffle() didn't drop any elements
+        std::size_t j;
+        for (j = 0; j != i + 1; ++j)
+            found [(buf + j)->val_ - 1] = true;
+
+        // iterate over elements of the found array once again,
+        // this time to verify that no elements of the buf array
+        // are missing
+        bool success = true;
+        for (j = 0; j != i + 1; ++j) {
+            success = found [j];
+            if (!success)
+                break;
+        }
+
+        rw_assert (success, 0, line,
+                   "%zu. std::%s<%s%{?}, %s%{;}>(): can't find %zu",
+                   i, fname, itname, rnd_gen, funname, j);
+
+        if (!success)
+            break;
+
+        // verify 25.2.11, p2
+        // exactly (i + 1) - 1 swaps * 2 assigns per swap = 2 * i assignments
+        success = T::n_total_op_assign_  - last_n_op_assign == 2 * i;
+        rw_assert (success, 0, line,
+                   "%zu. std::%s<%s%{?}, %s%{;}>(): complexity: %zu != %zu",
+                   i, fname, itname, rnd_gen, funname, 
+                   T::n_total_op_assign_  - last_n_op_assign, 2 * i);
+
+        if (!success)
+            break;
+    }
+
+    delete[] buf;
+    delete[] found;
+}
+
+/**************************************************************************/
+
+void test_random_shuffle (const std::size_t line)
+{
+#ifndef _RWSTD_NO_EXT_PORTABLE_RANDOM_SEQUENCE
+
+    rw_info (0, 0, 0,
+             "verify that the randomly shuffled sequence "
+             "matches the expected result, this "
+             "depends on the implementation of the random "
+             "number generator used by random_shuffle()");
+    
+    int array[] = {
+        0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
+        0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
+        0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
+        0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
+        0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
+        0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
+        0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
+        0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
+        0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
+        0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
+        0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
+        0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
+        0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
+        0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
+        0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
+        0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
+        0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
+        0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
+        0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
+        0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
+        0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
+        0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
+        0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
+        0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
+        0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
+        0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
+        0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
+        0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
+        0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
+        0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
+        0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
+        0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff
+    };
+
+    std::random_shuffle (array, array + sizeof array / sizeof *array);
+
+    const int result[] = {
+        0xad, 0x19, 0xcf, 0xa7, 0x40, 0xbc, 0x66, 0x42,
+        0xfb, 0xf4, 0xa6, 0x34, 0xce, 0xfe, 0xb9, 0xbe,
+        0x48, 0xff, 0xc5, 0xcc, 0x2d, 0x08, 0xe3, 0x3e,
+        0x29, 0xba, 0x1d, 0xb0, 0x6b, 0x07, 0x35, 0x1f,
+        0x30, 0xc3, 0x32, 0xc1, 0x70, 0xac, 0x50, 0x33,
+        0x5f, 0x49, 0x2f, 0x0f, 0x53, 0x05, 0xf0, 0xb6,
+        0x9d, 0xd9, 0x0c, 0xe5, 0x63, 0xf7, 0x8e, 0xd7,
+        0xb2, 0x13, 0x22, 0x69, 0x06, 0x02, 0xbf, 0x89,
+        0x82, 0x8f, 0x6e, 0x6c, 0xb4, 0xc0, 0xc4, 0xf2,
+        0x1b, 0x94, 0xfc, 0xe2, 0xd4, 0xf9, 0x0a, 0x5a,
+        0x10, 0x09, 0xe7, 0x9a, 0x6d, 0xa9, 0x75, 0xcd,
+        0x28, 0x2a, 0xae, 0x15, 0xbb, 0x62, 0x1e, 0xeb,
+        0x26, 0x90, 0x7e, 0xa3, 0x7f, 0x59, 0xfd, 0xde,
+        0x2b, 0x85, 0x74, 0x16, 0x45, 0x4c, 0xaa, 0x78,
+        0xf3, 0x01, 0x9f, 0x5c, 0x8c, 0x71, 0x0e, 0xe4,
+        0x86, 0xca, 0x11, 0x54, 0xa8, 0xd0, 0x1c, 0x96,
+        0xdc, 0xd1, 0x3c, 0xf6, 0xe1, 0x9e, 0x41, 0xa5,
+        0x27, 0x31, 0xa4, 0x4d, 0x57, 0x55, 0x7d, 0x0b,
+        0xc7, 0xd3, 0x6f, 0x84, 0x61, 0x25, 0xb7, 0xdd,
+        0x36, 0x58, 0x2e, 0xe6, 0x95, 0xa1, 0x39, 0x88,
+        0xf5, 0xfa, 0x91, 0x60, 0x83, 0xab, 0x38, 0xe0,
+        0xb5, 0x24, 0xed, 0x47, 0xea, 0x56, 0xa2, 0x68,
+        0xf1, 0x77, 0x3d, 0x97, 0xc6, 0x21, 0x7a, 0xb8,
+        0x14, 0x65, 0x3a, 0x43, 0x80, 0xdb, 0x52, 0x44,
+        0x23, 0x12, 0x5b, 0x37, 0x17, 0xd6, 0xbd, 0xec,
+        0x0d, 0xa0, 0x4f, 0xd5, 0x8a, 0x5e, 0x9b, 0x2c,
+        0x4a, 0x5d, 0xef, 0x81, 0x79, 0x8d, 0x03, 0x64,
+        0xdf, 0xb3, 0x04, 0x73, 0xaf, 0x87, 0xd8, 0x3b,
+        0x7b, 0x46, 0xc9, 0x76, 0xe9, 0x51, 0x6a, 0xc2,
+        0xd2, 0x1a, 0x7c, 0x4e, 0x93, 0x3f, 0x92, 0xc8,
+        0x8b, 0xe8, 0x20, 0x72, 0x18, 0x99, 0xcb, 0x67,
+           0, 0xb1, 0xf8, 0xda, 0x4b, 0x9c, 0x98, 0xee
+    };
+
+    bool success = true;
+    std::size_t i = 0;
+    for (; i != sizeof array / sizeof *array; ++i) {
+        success = array [i] == result [i];
+        if (!success)
+            break;
+    }
+
+    rw_assert (success, 0, line, 
+               "randomly shuffled sequence failed to match "
+               "the expected result (data portability failure) "
+               "%d != %d at %zu",
+               array [i], result [i], i + 1);
+
+#else
+    rw_note (0, 0, 0,
+             "_RWSTD_NO_EXT_PORTABLE_RANDOM_SEQUENCE is defined, "
+             "no random_test available");
+#endif   // _RWSTD_NO_EXT_PORTABLE_RANDOM_SEQUENCE
+}
+
+/**************************************************************************/
+
+/* extern */ int rw_opt_nloops = 1024;          // --nloops=#
+/* extern */ int rw_opt_no_random;              // --no-random
+/* extern */ int rw_opt_no_random_generator;    // --no-random_generator
+/* extern */ int rw_opt_no_rand_test;           // --no-rand_test
+
+
+static int run_test (int, char*[])
+{
+    const std::size_t N = std::size_t (rw_opt_nloops);
+
+    typedef RandomAccessIter<X>::difference_type DiffT;
+    typedef RandomGenerator<DiffT>               RandGenT;
+
+    if (rw_opt_no_random) {
+        rw_note (0, __FILE__, __LINE__, "std::random test disabled");
+    }
+    else {
+        rw_info (0, 0, 0,
+                 "template <class %s> "
+                 "std::random_shuffle (%1$s, %1$s)",
+                 "RandomAccessIterator");
+
+        test_random_shuffle (__LINE__, N, RandomAccessIter<X>(),
+                             (RandGenT*)0, (X*)0, false);
+    }
+
+    if (rw_opt_no_rand_test) {
+        rw_note (0, __FILE__, __LINE__, "random algorithm test disabled");
+    }
+    else {
+        test_random_shuffle (__LINE__);
+    }
+
+    if (rw_opt_no_random_generator) {
+        rw_note (0, __FILE__, __LINE__,  
+                 "std::random with random_generator test disabled");
+    }
+    else {
+        rw_info (0, 0, 0,
+                 "template <class %s, class %s> "
+                 "std::random_shuffle (%1$s, %1$s, %2$s)",
+                 "RandomAccessIterator", "RandomNumberGenerator");
+
+        test_random_shuffle (__LINE__, N, RandomAccessIter<X>(),
+                             (RandGenT*)0, (X*)0, true);
+    }
+
+    return 0;
+}
+
+/**************************************************************************/
+
+int main (int argc, char *argv[])
+{
+    return rw_test (argc, argv, __FILE__,
+                    "lib.alg.random_shuffle",
+                    0 /* no comment */, run_test,
+                    "|-nloops#0 "   // must be non-negative
+                    "|-no-random# "
+                    "|-no-random_generator# "
+                    "|-no-rand_test", 
+                    &rw_opt_nloops,
+                    &rw_opt_no_random,
+                    &rw_opt_no_random_generator,
+                    &rw_opt_no_rand_test);
+}

Propchange: incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp
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    svn:eol-style = native

Propchange: incubator/stdcxx/trunk/tests/algorithms/25.random.shuffle.cpp
------------------------------------------------------------------------------
    svn:keywords = Id



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