source: trunk/third/sendmail/libsm/t-types.c @ 19204

/*
 * Copyright (c) 2000-2002 Sendmail, Inc. and its suppliers.
 *      All rights reserved.
 *
 * By using this file, you agree to the terms and conditions set
 * forth in the LICENSE file which can be found at the top level of
 * the sendmail distribution.
 */

#include <sm/gen.h>
SM_IDSTR(id, "@(#)$Id: t-types.c,v 1.1.1.1 2003-04-08 15:07:10 zacheiss Exp $")

#include <sm/limits.h>
#include <sm/io.h>
#include <sm/string.h>
#include <sm/test.h>
#include <sm/types.h>

int
main(argc, argv)
        int argc;
        char **argv;
{
        LONGLONG_T ll;
        LONGLONG_T volatile lt;
        ULONGLONG_T ull;
        char buf[128];
        char *r;

        sm_test_begin(argc, argv, "test standard integral types");

        SM_TEST(sizeof(LONGLONG_T) == sizeof(ULONGLONG_T));

        /*
        **  sendmail assumes that ino_t, off_t and void* can be cast
        **  to ULONGLONG_T without losing information.
        */

        if (!SM_TEST(sizeof(ino_t) <= sizeof(ULONGLONG_T)) ||
            !SM_TEST(sizeof(off_t) <= sizeof(ULONGLONG_T)) ||
            !SM_TEST(sizeof(void*) <= sizeof(ULONGLONG_T)))
        {
                (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "\
Your C compiler appears to support a 64 bit integral type,\n\
but libsm is not configured to use it.  You will need to set\n\
either SM_CONF_LONGLONG or SM_CONF_QUAD_T to 1.  See libsm/README\n\
for more details.\n");
        }

        /*
        **  Most compilers notice that LLONG_MIN - 1 generate an underflow.
        **  Some compiler generate code that will use the 'X' status bit
        **  in a CPU and hence (LLONG_MIN - 1 > LLONG_MIN) will be false.
        **  So we have to decide whether we want compiler warnings or
        **  a wrong test...
        **  Question: where do we really need what this test tests?
        */

#if SM_CONF_TEST_LLONG
        ll = LLONG_MIN;
        (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "\
Your C compiler maybe issued a warning during compilation,\n\
please IGNORE the compiler warning!.\n");
        lt = LLONG_MIN - 1;
        SM_TEST(lt > ll);
        sm_snprintf(buf, sizeof(buf), "%llx", ll);
        r = "0";
        if (!SM_TEST(buf[0] == '8')
            || !SM_TEST(strspn(&buf[1], r) == sizeof(ll) * 2 - 1))
        {
                (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
                        "oops: LLONG_MIN=%s\n", buf);
        }

        ll = LLONG_MAX;
        lt = ll + 1;
        SM_TEST(lt < ll);
        sm_snprintf(buf, sizeof(buf), "%llx", ll);
        r = "f";
        if (!SM_TEST(buf[0] == '7')
            || !SM_TEST(strspn(&buf[1], r) == sizeof(ll) * 2 - 1))
        {
                (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
                        "oops: LLONG_MAX=%s\n", buf);
        }
#endif /* SM_CONF_TEST_LLONG */

        ull = ULLONG_MAX;
        SM_TEST(ull + 1 == 0);
        sm_snprintf(buf, sizeof(buf), "%llx", ull);
        r = "f";
        SM_TEST(strspn(buf, r) == sizeof(ll) * 2);

        /*
        **  If QUAD_MAX is defined by <limits.h> then quad_t is defined.
        **  Make sure LONGLONG_T is at least as big as quad_t.
        */
#ifdef QUAD_MAX
        SM_TEST(QUAD_MAX <= LLONG_MAX);
#endif

        return sm_test_end();
}