nsprpub/pr/tests/randseed.c

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
   2 /* This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 /*
   7 ** File: rngseed.c
   8 ** Description:
   9 ** Test NSPR's Random Number Seed generator
  10 **
  11 ** Initial test: Just make sure it outputs some data.
  12 **
  13 ** ... more? ... check some iterations to ensure it is random (no dupes)
  14 ** ... more? ... histogram distribution of random numbers
  15 */
  16
  17 #include "plgetopt.h"
  18 #include "nspr.h"
  19 #include "prrng.h"
  20 #include <stdio.h>
  21 #include <stdlib.h>
  22 #include <string.h>
  23
  24 /*
  25 ** Test harness infrastructure
  26 */
  27 PRLogModuleInfo *lm;
  28 PRLogModuleLevel msgLevel = PR_LOG_NONE;
  29 PRIntn  debug = 0;
  30 PRUint32  failed_already = 0;
  31 /* end Test harness infrastructure */
  32
  33 PRIntn  optRandCount = 30;
  34 char    buf[40];
  35 PRSize  bufSize = sizeof(buf);
  36 PRSize  rSize;
  37 PRIntn  i;
  38
  39 /*
  40 ** Emit help text for this test
  41 */
  42 static void Help( void )
  43 {
  44     printf("Template: Help(): display your help message(s) here");
  45     exit(1);
  46 } /* end Help() */
  47
  48 static void PrintRand( void *buf, PRIntn size )
  49 {
  50     PRUint32 *rp = buf;
  51     PRIntn   i;
  52
  53     printf("%4.4d--\n", size );
  54     while (size > 0 ) {
  55         switch( size )  {
  56             case 1 :
  57                 printf("%2.2X\n", *(rp++) );
  58                 size -= 4;
  59                 break;
  60             case 2 :
  61                 printf("%4.4X\n", *(rp++) );
  62                 size -= 4;
  63                 break;
  64             case 3 :
  65                 printf("%6.6X\n", *(rp++) );
  66                 size -= 4;
  67                 break;
  68             default:
  69                 while ( size >= 4) {
  70                     PRIntn i = 3;
  71                     do {
  72                         printf("%8.8X ", *(rp++) );
  73                         size -= 4;
  74                     } while( i-- );
  75                     i = 3;
  76                     printf("\n");
  77                 }
  78                 break;
  79         } /* end switch() */
  80     } /* end while() */
  81 } /* end PrintRand() */
  82
  83
  84 int main(int argc, char **argv)
  85 {
  86     {
  87         /*
  88         ** Get command line options
  89         */
  90         PLOptStatus os;
  91         PLOptState *opt = PL_CreateOptState(argc, argv, "hdv");
  92
  93         while (PL_OPT_EOL != (os = PL_GetNextOpt(opt)))
  94         {
  95             if (PL_OPT_BAD == os) {
  96                 continue;
  97             }
  98             switch (opt->option)
  99             {
 100                 case 'd':  /* debug */
 101                     debug = 1;
 102                     msgLevel = PR_LOG_ERROR;
 103                     break;
 104                 case 'v':  /* verbose mode */
 105                     msgLevel = PR_LOG_DEBUG;
 106                     break;
 107                 case 'h':  /* help message */
 108                     Help();
 109                     break;
 110                 default:
 111                     break;
 112             }
 113         }
 114         PL_DestroyOptState(opt);
 115     }
 116
 117     lm = PR_NewLogModule("Test");       /* Initialize logging */
 118     for ( i = 0; i < optRandCount ; i++ ) {
 119         memset( buf, 0, bufSize );
 120         rSize = PR_GetRandomNoise( buf, bufSize );
 121         if (!rSize) {
 122             fprintf(stderr, "Not implemented\n" );
 123             failed_already = PR_TRUE;
 124             break;
 125         }
 126         if (debug) {
 127             PrintRand( buf, rSize );
 128         }
 129     }
 130
 131     if (debug) {
 132         printf("%s\n", (failed_already)? "FAIL" : "PASS");
 133     }
 134     return( (failed_already == PR_TRUE )? 1 : 0 );
 135 }  /* main() */
 136 /* end template.c */
 137