rtl/random/rtl_random.cxx

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 *
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
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 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
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 * 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
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// MARKER(update_precomp.py): autogen include statement, do not remove
#include "precompiled_sal.hxx"
// autogenerated file with codegen.pl

#include <algorithm> // STL

#include <testshl/simpleheader.hxx>
#include <rtl/random.h>

namespace rtl_random
{

class createPool : public CppUnit::TestFixture
{
public:
    // initialise your test code values here.
    void setUp()
    {
    }

    void tearDown()
    {
    }

    // insert your test code here.
    // this is only demonstration code
    void createPool_001()
    {
        // this is demonstration code

        rtlRandomPool aPool = rtl_random_createPool();

        // LLA: seems to be that an other test is not possible for createPool()
        CPPUNIT_ASSERT_MESSAGE("create failed", aPool != NULL);

        rtl_random_destroyPool(aPool);
    }

    // Change the following lines only, if you add, remove or rename
    // member functions of the current class,
    // because these macros are need by auto register mechanism.

    CPPUNIT_TEST_SUITE(createPool);
    CPPUNIT_TEST(createPool_001);
    CPPUNIT_TEST_SUITE_END();
}; // class createPool


class destroyPool : public CppUnit::TestFixture
{
public:
    // initialise your test code values here.
    void setUp()
    {
    }

    void tearDown()
    {
    }

    // insert your test code here.
    void destroyPool_000()
    {
        // GPF, if failed
        rtl_random_destroyPool(NULL);
    }

    void destroyPool_001()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        // LLA: seems to be that an other test is not possible for createPool()
        CPPUNIT_ASSERT_MESSAGE("create failed", aPool != NULL);

        rtl_random_destroyPool(aPool);
    }
    // Change the following lines only, if you add, remove or rename
    // member functions of the current class,
    // because these macros are need by auto register mechanism.

    CPPUNIT_TEST_SUITE(destroyPool);
    CPPUNIT_TEST(destroyPool_000);
    CPPUNIT_TEST(destroyPool_001);
    CPPUNIT_TEST_SUITE_END();
}; // class destroyPool


class addBytes : public CppUnit::TestFixture
{
public:
    // initialise your test code values here.
    void setUp()
    {
    }

    void tearDown()
    {
    }

    // insert your test code here.
    // this is only demonstration code
    void addBytes_000()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 4;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
        memset(pBuffer, 0, nBufLen);

        rtlRandomError aError = rtl_random_addBytes(NULL, NULL, 0);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);

        /* rtlRandomError */ aError = rtl_random_addBytes(aPool, NULL, 0);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);

        /* rtlRandomError */ aError = rtl_random_addBytes(aPool, pBuffer, nBufLen);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;

    }

    void addBytes_001()
        {
            rtlRandomPool aPool = rtl_random_createPool();

            sal_uInt32  nBufLen = 4;
            sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];

            memset(pBuffer, 0, nBufLen);

            rtl_random_addBytes(aPool, pBuffer, nBufLen);

            t_print("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);

            rtl_random_destroyPool(aPool);
            delete [] pBuffer;
        }


    // Change the following lines only, if you add, remove or rename
    // member functions of the current class,
    // because these macros are need by auto register mechanism.

    CPPUNIT_TEST_SUITE(addBytes);
    CPPUNIT_TEST(addBytes_000);
    CPPUNIT_TEST(addBytes_001);
    CPPUNIT_TEST_SUITE_END();
}; // class addBytes


class Statistics
{
    int m_nDispensation[256];

    int m_nMin;
    int m_nMax;
    int m_nAverage;
    int m_nMinDeviation;
    int m_nMaxDeviation;

public:
    void clearDispensation()
        {
            for (int i = 0;i < 256;i ++)                        // clear array
            {
                m_nDispensation[i] = 0;
            }
        }
    Statistics()
        {
            clearDispensation();
        }
    ~Statistics(){}

    void addValue(sal_Int16 _nIndex, sal_Int32 _nValue)
        {
            OSL_ASSERT(_nIndex >= 0 && _nIndex < 256);
            m_nDispensation[_nIndex] += _nValue;
        }

    void build(sal_Int32 _nCountMax)
        {
            m_nMin = _nCountMax;
            m_nMax = 0;

            m_nAverage = _nCountMax / 256;

            m_nMinDeviation = _nCountMax;
            m_nMaxDeviation = 0;

            for (int i = 0;i < 256;i ++)                        // show dispensation
            {
                m_nMin = std::min(m_nMin, m_nDispensation[i]);
                m_nMax = std::max(m_nMax, m_nDispensation[i]);

                m_nMinDeviation = std::min(m_nMinDeviation, abs(m_nAverage - m_nDispensation[i]));
                m_nMaxDeviation = std::max(m_nMaxDeviation, abs(m_nAverage - m_nDispensation[i]));
            }
        }

    void print()
        {
            // LLA: these are only info values
            t_print("\nSome statistics\n");
            t_print("Min: %d\n", m_nMin);
            t_print("Max: %d\n", m_nMax);
            t_print("Average: %d\n", m_nAverage);
            t_print("Min abs deviation: %d\n", m_nMinDeviation);
            t_print("Max abs deviation: %d\n", m_nMaxDeviation);
        }

    sal_Int32 getAverage() {return m_nAverage;}
    sal_Int32 getMaxDeviation() {return m_nMaxDeviation;}

};

class getBytes : public CppUnit::TestFixture
{
public:
    // initialise your test code values here.
    void setUp()
    {
    }

    void tearDown()
    {
    }

    // insert your test code here.
    void getBytes_000()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 4;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
        memset(pBuffer, 0, nBufLen);

        rtlRandomError aError = rtl_random_getBytes(NULL, NULL, 0);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);

        /* rtlRandomError */ aError = rtl_random_getBytes(aPool, NULL, 0);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_Argument);

        /* rtlRandomError */ aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;
    }

    void getBytes_001()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 4;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
        memset(pBuffer, 0, nBufLen);

        rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);

        t_print("%2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3]);

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;
    }

    void getBytes_002()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 4;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen << 1 ];
        memset(pBuffer, 0, nBufLen << 1);

        CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[4] == 0 && pBuffer[5] == 0 && pBuffer[6] == 0 && pBuffer[7] == 0);

        rtlRandomError aError = rtl_random_getBytes(aPool, pBuffer, nBufLen);
        CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);

        t_print("%2x %2x %2x %2x %2x %2x %2x %2x\n", pBuffer[0], pBuffer[1], pBuffer[2], pBuffer[3], pBuffer[4], pBuffer[5], pBuffer[6], pBuffer[7]);

        CPPUNIT_ASSERT_MESSAGE("internal memory overwrite", pBuffer[4] == 0 && pBuffer[5] == 0 && pBuffer[6] == 0 && pBuffer[7] == 0);

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;
    }

    void getBytes_003()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 1;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
        memset(pBuffer, 0, nBufLen);

        Statistics aStat;

        CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[0] == 0);

        int nCount = 0;

        int nCountMax = 1000000;
        for(nCount = 0;nCount < nCountMax; nCount ++)                  // run 100000000 through getBytes(...)
        {
            /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer, nBufLen);
            /* CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None); */

            aStat.addValue(pBuffer[0], 1);
        }

        aStat.build(nCountMax);
        aStat.print();

        CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;
    }

    void getBytes_003_1()
    {
        rtlRandomPool aPool = rtl_random_createPool();

        sal_uInt32  nBufLen = 256;
        sal_uInt8   *pBuffer = new sal_uInt8[ nBufLen ];
        memset(pBuffer, 0, nBufLen);

        Statistics aStat;

        CPPUNIT_ASSERT_MESSAGE("memset failed", pBuffer[0] == 0);

        int nCount = 0;

        int nCountMax = 10000;
        for(nCount = 0;nCount < nCountMax; nCount ++)                  // run 100000000 through getBytes(...)
        {
            /* rtlRandomError aError = */ rtl_random_getBytes(aPool, pBuffer, nBufLen);
            // CPPUNIT_ASSERT_MESSAGE("wrong parameter", aError == rtl_Random_E_None);

            for (sal_uInt32 i=0;i<nBufLen;i++)
            {
                aStat.addValue(pBuffer[i], 1);
            }
        }

        aStat.build(nCountMax * nBufLen);
        aStat.print();

        CPPUNIT_ASSERT_MESSAGE("deviation should be less average", aStat.getMaxDeviation() < aStat.getAverage());

        rtl_random_destroyPool(aPool);
        delete [] pBuffer;
    }

    // Change the following lines only, if you add, remove or rename
    // member functions of the current class,
    // because these macros are need by auto register mechanism.

    CPPUNIT_TEST_SUITE(getBytes);
    CPPUNIT_TEST(getBytes_000);
    CPPUNIT_TEST(getBytes_001);
    CPPUNIT_TEST(getBytes_002);
    CPPUNIT_TEST(getBytes_003);
    CPPUNIT_TEST(getBytes_003_1);
    CPPUNIT_TEST_SUITE_END();
}; // class getBytes

// -----------------------------------------------------------------------------
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(rtl_random::createPool, "rtl_random");
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(rtl_random::destroyPool, "rtl_random");
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(rtl_random::addBytes, "rtl_random");
CPPUNIT_TEST_SUITE_NAMED_REGISTRATION(rtl_random::getBytes, "rtl_random");
} // namespace rtl_random


// -----------------------------------------------------------------------------

// this macro creates an empty function, which will called by the RegisterAllFunctions()
// to let the user the possibility to also register some functions by hand.
NOADDITIONAL;