1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
/* testlib.c: TEST LIBRARY
 *
 * $Id: //info.ravenbrook.com/project/mps/version/1.104/code/testlib.c#1 $
 * Copyright (c) 2001 Ravenbrook Limited.  See end of file for license.
 * Portions copyright (C) 2002 Global Graphics Software.
 *
 * .purpose: A library of functions that may be of use to unit tests.
 */

#include "testlib.h"
#include "mps.h"
#include "misc.h" /* for NOOP */
#include <math.h>
#include <stdlib.h>
#include <limits.h>
#ifdef MPS_OS_IA
struct itimerspec; /* stop complaints from time.h */
#endif
#include <time.h>


/* rnd -- a random number generator
 *
 * I nabbed it from "ML for the Working Programmer", originally from:
 * Stephen K Park & Keith W Miller (1988). Random number generators:
 * good one are to find.  Communications of the ACM, 31:1192-1201.
 */

unsigned long rnd(void)
{
  static unsigned long seed = 1;
  double s;

  s = seed;
  s *= 16807.0;
  s = fmod(s, 2147483647.0);  /* 2^31 - 1 */
  seed = (unsigned long)s;
  return seed;
}


/* rnd_addr -- a random address generator
 *
 * rnd gives 31 random bits, we run it repeatedly to get enough bits.
 */

#define ADDR_BITS (sizeof(mps_addr_t) * CHAR_BIT)

mps_addr_t rnd_addr(void)
{
  mps_word_t res;
  unsigned bits;

  for (bits = 0, res = 0; bits < ADDR_BITS;
       bits += 31, res = res << 31 | (mps_word_t)rnd())
    NOOP;
  return (mps_addr_t)res;
}


/* randomize -- randomize the generator, or initialize to replay */

void randomize(int argc, char **argv)
{
  int i, k, n;

  if (argc > 1) {
    n = sscanf(argv[1], "%d", &k);
    die((n == 1) ? MPS_RES_OK : MPS_RES_FAIL, "randomize");
  } else {
    k = time(NULL) % 32000;
    printf("Randomizing %d times.\n", k);
  }

  /* Randomize the random number generator a bit. */
  for (i = k; i > 0; --i)
    rnd();
}


/* verror -- die with message */

void verror(const char *format, va_list args)
{
  fflush(stdout); /* synchronize */
  vfprintf(stderr, format, args);
  fprintf(stderr, "\n");
  exit(1);
}


/* error -- die with message */

void error(const char *format, ...)
{
 va_list args;

 va_start(args, format);
 verror(format, args);
 va_end(args);
}


/* die -- Test a return code, and exit on error */

void die(mps_res_t res, const char *s)
{
  if (res != MPS_RES_OK) {
    error("\n%s: %d\n", s, res);
  }
}


/* die_expect -- Test a return code, and exit on unexpected result */

void die_expect(mps_res_t res, mps_res_t expected, const char *s)
{
  if (res != expected) {
    error("\n%s: %d\n", s, res);
  }
}


/* cdie -- Test a C boolean, and exit on error */

void cdie(int res, const char *s)
{
  if (!res) {
    error("\n%s: %d\n", s, res);
  }
}


/* C. COPYRIGHT AND LICENSE
 *
 * Copyright (C) 2001-2002 Ravenbrook Limited <http://www.ravenbrook.com/>.
 * All rights reserved.  This is an open source license.  Contact
 * Ravenbrook for commercial licensing options.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 * 
 * 1. Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 * 
 * 2. Redistributions in binary form must reproduce the above copyright
 * notice, this list of conditions and the following disclaimer in the
 * documentation and/or other materials provided with the distribution.
 * 
 * 3. Redistributions in any form must be accompanied by information on how
 * to obtain complete source code for this software and any accompanying
 * software that uses this software.  The source code must either be
 * included in the distribution or be available for no more than the cost
 * of distribution plus a nominal fee, and must be freely redistributable
 * under reasonable conditions.  For an executable file, complete source
 * code means the source code for all modules it contains. It does not
 * include source code for modules or files that typically accompany the
 * major components of the operating system on which the executable file
 * runs.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
 * PURPOSE, OR NON-INFRINGEMENT, ARE DISCLAIMED. IN NO EVENT SHALL THE
 * COPYRIGHT HOLDERS AND CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */