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/* testlib.c: TEST LIBRARY
*
* $Id$
* 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>
#ifdef MPS_OS_W3
#ifdef _MSC_VER
#pragma warning(disable: 4702) /* unreachable code */
/* job000605: believed needed to prevent VC7 warning
* for error() below, in which va_end is mandated by
* ISO C (C99:7.15.1) even though it is unreachable.
*/
#endif
#endif
/* 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.
*/
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