rand2.c

eCos操作系统源码

//=================================================================
//
//        rand2.c
//
//        Testcase for C library rand()
//
//=================================================================
//####ECOSGPLCOPYRIGHTBEGIN####
// -------------------------------------------
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//####ECOSGPLCOPYRIGHTEND####
//=================================================================
//#####DESCRIPTIONBEGIN####
//
// Author(s):     ctarpy, jlarmour
// Contributors:  
// Date:          2000-04-30
// Description:   Contains testcode for C library rand() function
//
//
//####DESCRIPTIONEND####

// INCLUDES

#include <pkgconf/libc_stdlib.h>   // CYGNUM_LIBC_RAND_SEED
#include <stdlib.h>
#include <cyg/infra/testcase.h>


// FUNCTIONS

static void
test( CYG_ADDRWORD data )
{
    static int rand_data1[100];
    static int rand_data2[100];
    int count;
    int fail=0;

    // Test that rand starts with the seed as CYGNUM_LIBC_RAND_SEED
    
    for ( count=0; count < 100; ++count ) {
        rand_data1[count] = rand();
    } // for

    // set seed to CYGNUM_LIBC_RAND_SEED
    srand(CYGNUM_LIBC_RAND_SEED);

    for ( count=0; count < 100; ++count ) {
        rand_data2[count] = rand();
    } // for

    for ( count=0; count < 100; ++count ) {
        if (rand_data1[count] != rand_data2[count])
            ++fail;
    } // for

    CYG_TEST_PASS_FAIL(fail==0, "rand() has seed initialised to "
                       "CYGNUM_LIBC_RAND_SEED");

    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 rand2.c