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[/] [openrisc/] [trunk/] [rtos/] [ecos-2.0/] [packages/] [language/] [c/] [libc/] [stdlib/] [v2_0/] [tests/] [srand.c] - Rev 174
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//================================================================= // // srand.c // // Testcase for C library srand() // //================================================================= //####ECOSGPLCOPYRIGHTBEGIN#### // ------------------------------------------- // This file is part of eCos, the Embedded Configurable Operating System. // Copyright (C) 1998, 1999, 2000, 2001, 2002 Red Hat, Inc. // // eCos is free software; you can redistribute it and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation; either version 2 or (at your option) any later version. // // eCos is distributed in the hope that it will be useful, but WITHOUT ANY // WARRANTY; without even the implied warranty of MERCHANTABILITY or // FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License // for more details. // // You should have received a copy of the GNU General Public License along // with eCos; if not, write to the Free Software Foundation, Inc., // 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. // // As a special exception, if other files instantiate templates or use macros // or inline functions from this file, or you compile this file and link it // with other works to produce a work based on this file, this file does not // by itself cause the resulting work to be covered by the GNU General Public // License. However the source code for this file must still be made available // in accordance with section (3) of the GNU General Public License. // // This exception does not invalidate any other reasons why a work based on // this file might be covered by the GNU General Public License. // // Alternative licenses for eCos may be arranged by contacting Red Hat, Inc. // at http://sources.redhat.com/ecos/ecos-license/ // ------------------------------------------- //####ECOSGPLCOPYRIGHTEND#### //================================================================= //#####DESCRIPTIONBEGIN#### // // Author(s): ctarpy, jlarmour // Contributors: // Date: 2000-04-30 // Description: Contains testcode for C library srand() function // // //####DESCRIPTIONEND#### // INCLUDES #include <stdlib.h> #include <cyg/infra/testcase.h> // 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 // FUNCTIONS static void test( 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() int main(int argc, char *argv[]) { CYG_TEST_INIT(); CYG_TEST_INFO("Starting tests from testcase " __FILE__ " for C library " "srand() function"); test(0); CYG_TEST_NA("Testing is not applicable to this configuration"); } // main() // EOF srand.c