contrib/sendmail-8.13.7/libsm/t-types.c

   1 /*
   2  * Copyright (c) 2000-2002 Sendmail, Inc. and its suppliers.
   3  *      All rights reserved.
   4  *
   5  * By using this file, you agree to the terms and conditions set
   6  * forth in the LICENSE file which can be found at the top level of
   7  * the sendmail distribution.
   8  */
   9
  10 #include <sm/gen.h>
  11 SM_IDSTR(id, "@(#)$Id: t-types.c,v 1.18 2002/03/13 17:29:53 gshapiro Exp $")
  12
  13 #include <sm/limits.h>
  14 #include <sm/io.h>
  15 #include <sm/string.h>
  16 #include <sm/test.h>
  17 #include <sm/types.h>
  18
  19 int
  20 main(argc, argv)
  21         int argc;
  22         char **argv;
  23 {
  24         LONGLONG_T ll;
  25         LONGLONG_T volatile lt;
  26         ULONGLONG_T ull;
  27         char buf[128];
  28         char *r;
  29
  30         sm_test_begin(argc, argv, "test standard integral types");
  31
  32         SM_TEST(sizeof(LONGLONG_T) == sizeof(ULONGLONG_T));
  33
  34         /*
  35         **  sendmail assumes that ino_t, off_t and void* can be cast
  36         **  to ULONGLONG_T without losing information.
  37         */
  38
  39         if (!SM_TEST(sizeof(ino_t) <= sizeof(ULONGLONG_T)) ||
  40             !SM_TEST(sizeof(off_t) <= sizeof(ULONGLONG_T)) ||
  41             !SM_TEST(sizeof(void*) <= sizeof(ULONGLONG_T)))
  42         {
  43                 (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "\
  44 Your C compiler appears to support a 64 bit integral type,\n\
  45 but libsm is not configured to use it.  You will need to set\n\
  46 either SM_CONF_LONGLONG or SM_CONF_QUAD_T to 1.  See libsm/README\n\
  47 for more details.\n");
  48         }
  49
  50         /*
  51         **  Most compilers notice that LLONG_MIN - 1 generate an underflow.
  52         **  Some compiler generate code that will use the 'X' status bit
  53         **  in a CPU and hence (LLONG_MIN - 1 > LLONG_MIN) will be false.
  54         **  So we have to decide whether we want compiler warnings or
  55         **  a wrong test...
  56         **  Question: where do we really need what this test tests?
  57         */
  58
  59 #if SM_CONF_TEST_LLONG
  60         ll = LLONG_MIN;
  61         (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT, "\
  62 Your C compiler maybe issued a warning during compilation,\n\
  63 please IGNORE the compiler warning!.\n");
  64         lt = LLONG_MIN - 1;
  65         SM_TEST(lt > ll);
  66         sm_snprintf(buf, sizeof(buf), "%llx", ll);
  67         r = "0";
  68         if (!SM_TEST(buf[0] == '8')
  69             || !SM_TEST(strspn(&buf[1], r) == sizeof(ll) * 2 - 1))
  70         {
  71                 (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
  72                         "oops: LLONG_MIN=%s\n", buf);
  73         }
  74
  75         ll = LLONG_MAX;
  76         lt = ll + 1;
  77         SM_TEST(lt < ll);
  78         sm_snprintf(buf, sizeof(buf), "%llx", ll);
  79         r = "f";
  80         if (!SM_TEST(buf[0] == '7')
  81             || !SM_TEST(strspn(&buf[1], r) == sizeof(ll) * 2 - 1))
  82         {
  83                 (void) sm_io_fprintf(smioerr, SM_TIME_DEFAULT,
  84                         "oops: LLONG_MAX=%s\n", buf);
  85         }
  86 #endif /* SM_CONF_TEST_LLONG */
  87
  88         ull = ULLONG_MAX;
  89         SM_TEST(ull + 1 == 0);
  90         sm_snprintf(buf, sizeof(buf), "%llx", ull);
  91         r = "f";
  92         SM_TEST(strspn(buf, r) == sizeof(ll) * 2);
  93
  94         /*
  95         **  If QUAD_MAX is defined by <limits.h> then quad_t is defined.
  96         **  Make sure LONGLONG_T is at least as big as quad_t.
  97         */
  98 #ifdef QUAD_MAX
  99         SM_TEST(QUAD_MAX <= LLONG_MAX);
 100 #endif
 101
 102         return sm_test_end();
 103 }