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//=================================================================

//

//        rand1.c

//

//        Testcase for C library rand()

//

//=================================================================

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//=================================================================

//#####DESCRIPTIONBEGIN####

//

// Author(s):     ctarpy, jlarmour

// Contributors:  

// Date:          2000-04-30

// Description:   Contains testcode for C library rand() function

//

//

//####DESCRIPTIONEND####

// INCLUDES

#include <pkgconf/system.h>

#include <stdlib.h>

#include <cyg/infra/testcase.h>

// CONSTANTS

// This is the max allowable hits, where a hit is an element

// of a random array being the same as index+1 or index+2

#define TOLERANCE 2

// FUNCTIONS

static void

test( CYG_ADDRWORD data )

{

    int ctr;

    static int array[1024];

    int hits=0;

    for (ctr=0; ctr<1024; ctr++)

        array[ctr] = rand();

    for (ctr=0; ctr< 1021; ctr++)

        if ((array[ctr]==array[ctr+1]) ||

            (array[ctr]==array[ctr+2]) ||

            (array[ctr]==array[ctr+3]))

            hits++;

    CYG_TEST_PASS_FAIL(hits <= TOLERANCE,

                       "Simple test for rand() repetition");

    CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for "

                    "C library rand() function");

} // test()

#ifndef CYGPKG_LIBC_STARTUP

void cyg_user_start(void)

#else

int

main( int argc, char *argv[] )

#endif

{

    CYG_TEST_INIT();

    CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "

                  "rand() function");

    test(0);

    CYG_TEST_NA("Testing is not applicable to this configuration");

} // main()

// EOF rand1.c