/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

/*
** File: rngseed.c
** Description:
** Test NSPR's Random Number Seed generator
**
** Initial test: Just make sure it outputs some data.
**
** ... more? ... check some iterations to ensure it is random (no dupes)
** ... more? ... histogram distribution of random numbers
*/

#include "plgetopt.h"
#include "nspr.h"
#include "prrng.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

/*
** Test harness infrastructure
*/
PRLogModuleInfo* lm;
PRLogModuleLevel msgLevel = PR_LOG_NONE;
PRIntn debug = 0;
PRUint32 failed_already = 0;
/* end Test harness infrastructure */

PRIntn optRandCount = 30;
char buf[40];
PRSize bufSize = sizeof(buf);
PRSize rSize;
PRIntn i;

/*
** Emit help text for this test
*/
static void
Help(void)
{
    printf("Template: Help(): display your help message(s) here");
    exit(1);
} /* end Help() */

static void
PrintRand(void* buf, PRIntn size)
{
    PRUint32* rp = buf;
    PRIntn i;

    printf("%4.4d--\n", size);
    while (size > 0) {
        switch (size) {
            case 1:
                printf("%2.2X\n", *(rp++));
                size -= 4;
                break;
            case 2:
                printf("%4.4X\n", *(rp++));
                size -= 4;
                break;
            case 3:
                printf("%6.6X\n", *(rp++));
                size -= 4;
                break;
            default:
                while (size >= 4) {
                    PRIntn i = 3;
                    do {
                        printf("%8.8X ", *(rp++));
                        size -= 4;
                    } while (i--);
                    i = 3;
                    printf("\n");
                }
                break;
        } /* end switch() */
    } /* end while() */
} /* end PrintRand() */

int
main(int argc, char** argv)
{
    {
        /*
        ** Get command line options
        */
        PLOptStatus os;
        PLOptState* opt = PL_CreateOptState(argc, argv, "hdv");

        while (PL_OPT_EOL != (os = PL_GetNextOpt(opt))) {
            if (PL_OPT_BAD == os) {
                continue;
            }
            switch (opt->option) {
                case 'd': /* debug */
                    debug = 1;
                    msgLevel = PR_LOG_ERROR;
                    break;
                case 'v': /* verbose mode */
                    msgLevel = PR_LOG_DEBUG;
                    break;
                case 'h': /* help message */
                    Help();
                    break;
                default:
                    break;
            }
        }
        PL_DestroyOptState(opt);
    }

    lm = PR_NewLogModule("Test"); /* Initialize logging */
    for (i = 0; i < optRandCount; i++) {
        memset(buf, 0, bufSize);
        rSize = PR_GetRandomNoise(buf, bufSize);
        if (!rSize) {
            fprintf(stderr, "Not implemented\n");
            failed_already = PR_TRUE;
            break;
        }
        if (debug) {
            PrintRand(buf, rSize);
        }
    }

    if (debug) {
        printf("%s\n", (failed_already) ? "FAIL" : "PASS");
    }
    return ((failed_already == PR_TRUE) ? 1 : 0);
} /* main() */
/* end template.c */
