//=================================================================////        srand.c////        Testcase for C library srand()////=================================================================//####COPYRIGHTBEGIN####//// -------------------------------------------// The contents of this file are subject to the Cygnus eCos Public License// Version 1.0 (the "License"); you may not use this file except in// compliance with the License.  You may obtain a copy of the License at// http://sourceware.cygnus.com/ecos// // Software distributed under the License is distributed on an "AS IS"// basis, WITHOUT WARRANTY OF ANY KIND, either express or implied.  See the// License for the specific language governing rights and limitations under// the License.// // The Original Code is eCos - Embedded Cygnus Operating System, released// September 30, 1998.// // The Initial Developer of the Original Code is Cygnus.  Portions created// by Cygnus are Copyright (C) 1998,1999 Cygnus Solutions.  All Rights Reserved.// -------------------------------------------////####COPYRIGHTEND####//=================================================================//#####DESCRIPTIONBEGIN####//// Author(s):     ctarpy, jlarmour// Contributors:  jlarmour// Date:          1999-01-20// Description:   Contains testcode for C library srand() function//////####DESCRIPTIONEND####// Declarations for test system://// TESTCASE_TYPE=CYG_TEST_MODULE// CONFIGURATION#include <pkgconf/libc.h>   // Configuration header// INCLUDES#include <stdlib.h>#include <cyg/infra/testcase.h>#include <sys/cstartup.h>          // C library initialisation// HOW TO START TESTS#if defined(CYGPKG_LIBC)# define START_TEST( test ) test(0)#else# define START_TEST( test ) CYG_EMPTY_STATEMENT#endif // if defined(CYGPKG_LIBC)// CONSTANTS// Max cross correlation value of two sequences of// different seed#define X_CORREL 10// size of arrays to use for testing#define TEST_SIZE 1024// FUNCTIONSexternC voidcyg_package_start( void ){#ifdef CYGPKG_LIBC    cyg_iso_c_start();#else    (void)main(0, NULL);#endif} // cyg_package_start()#if defined(CYGPKG_LIBC)static voidtest( CYG_ADDRWORD data ){    int ctr;    static int array_1[TEST_SIZE];    static int array_2[TEST_SIZE];    static int array_3[TEST_SIZE];    int hits;    int fail;    srand(3);    for (ctr=0; ctr<TEST_SIZE; ++ctr)        array_1[ctr] = rand();    srand(9);    for (ctr=0; ctr<TEST_SIZE; ++ctr)        array_2[ctr] = rand();    srand(3);    for (ctr=0; ctr<TEST_SIZE; ++ctr)        array_3[ctr] = rand();    // Make sure arrays 1 and 3 are the same    fail = 0;    for (ctr=0; ctr<TEST_SIZE; ++ctr) {        if (array_1[ctr] != array_3[ctr])            ++fail;    } // for    CYG_TEST_PASS_FAIL( fail == 0, "resetting the seed to the same value");    // Check sequences of different seeds are different    hits = 0;    for (ctr=0; ctr<TEST_SIZE; ++ctr) {        if (array_1[ctr] == array_2[ctr])            ++hits;    } // for    CYG_TEST_PASS_FAIL(hits < X_CORREL,                       "random sequence for different seeds is different");    CYG_TEST_FINISH("Finished tests from testcase " __FILE__ " for "                    "C library srand() function");} // test()#endif // if defined(CYGPKG_LIBC)intmain(int argc, char *argv[]){    CYG_TEST_INIT();    CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library "                  "srand() function");    START_TEST( test );    CYG_TEST_NA("Testing is not applicable to this configuration");} // main()// EOF srand.c