//=================================================================
//
//        rand1.c
//
//        Testcase for C library rand()
//
//=================================================================
//####COPYRIGHTBEGIN####
//                                                                          
// -------------------------------------------                              
// The contents of this file are subject to the Red Hat eCos Public License 
// Version 1.1 (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.redhat.com/                                                   
//                                                                          
// Software distributed under the License is distributed on an "AS IS"      
// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the 
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// the License.                                                             
//                                                                          
// The Original Code is eCos - Embedded Configurable Operating System,      
// released September 30, 1998.                                             
//                                                                          
// The Initial Developer of the Original Code is Red Hat.                   
// Portions created by Red Hat are                                          
// Copyright (C) 1998, 1999, 2000 Red Hat, Inc.                             
// All Rights Reserved.                                                     
// -------------------------------------------                              
//                                                                          
//####COPYRIGHTEND####
//=================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     ctarpy, jlarmour
// Contributors:  
// Date:          2000-04-30
// Description:   Contains testcode for C library rand() function
//
//
//####DESCRIPTIONEND####

// INCLUDES

#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()

int
main(int argc, char *argv[])
{
    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