70 lines
1.9 KiB
C
70 lines
1.9 KiB
C
/* It is important that this comes first to not hide effects introduced
|
|
by other headers. */
|
|
#include <limits.h>
|
|
|
|
#include <inttypes.h>
|
|
#include <stdio.h>
|
|
|
|
|
|
static long long int
|
|
bitval (int bits)
|
|
{
|
|
long long int val = 0;
|
|
while (bits-- > 0)
|
|
val |= 1ll << bits;
|
|
return val;
|
|
}
|
|
|
|
|
|
int
|
|
main (void)
|
|
{
|
|
int result = 0;
|
|
|
|
#define TEST(name, format, expected) \
|
|
printf ("%-12s expected = %-20" format " actual = %" format "\n", \
|
|
#name ":", expected, name); \
|
|
result |= name != expected
|
|
|
|
/* The limits from ISO C99. */
|
|
|
|
/* We cannot support anything but 8-bit chars. */
|
|
TEST (CHAR_BIT, "d", 8);
|
|
TEST (SCHAR_MIN, "d", -128);
|
|
TEST (SCHAR_MAX, "d", 127);
|
|
TEST (UCHAR_MAX, "d", 255);
|
|
|
|
TEST (SHRT_MIN, "d", -(1 << (sizeof (short int) * CHAR_BIT - 1)));
|
|
TEST (SHRT_MAX, "d", (1 << (sizeof (short int) * CHAR_BIT - 1)) - 1);
|
|
TEST (USHRT_MAX, "d", (1 << sizeof (short int) * CHAR_BIT) - 1);
|
|
|
|
TEST (INT_MIN, "d", (int) -bitval (sizeof (int) * CHAR_BIT - 1) - 1);
|
|
TEST (INT_MAX, "d", (int) bitval (sizeof (int) * CHAR_BIT - 1));
|
|
TEST (UINT_MAX, "u",
|
|
(unsigned int) bitval (sizeof (unsigned int) * CHAR_BIT));
|
|
|
|
TEST (LONG_MIN, "ld",
|
|
(long int) -bitval (sizeof (long int) * CHAR_BIT - 1) - 1);
|
|
TEST (LONG_MAX, "ld", (long int) bitval (sizeof (long int) * CHAR_BIT - 1));
|
|
TEST (ULONG_MAX, "lu",
|
|
(unsigned long int) bitval (sizeof (unsigned long int) * CHAR_BIT));
|
|
|
|
TEST (LLONG_MIN, "lld", -bitval (sizeof (long long int) * CHAR_BIT - 1) - 1);
|
|
TEST (LLONG_MAX, "lld", bitval (sizeof (long long int) * CHAR_BIT - 1));
|
|
TEST (ULLONG_MAX, "llu",
|
|
(unsigned long long int) bitval (sizeof (unsigned long long int)
|
|
* CHAR_BIT));
|
|
|
|
/* Values from POSIX and Unix. */
|
|
#ifdef PAGESIZE
|
|
TEST (PAGESIZE, "d", getpagesize ());
|
|
#elif PAGE_SIZE
|
|
TEST (PAGE_SIZE, "d", getpagesize ());
|
|
#endif
|
|
|
|
TEST (WORD_BIT, "d", (int) sizeof (int) * CHAR_BIT);
|
|
TEST (LONG_BIT, "d", (int) sizeof (long int) * CHAR_BIT);
|
|
|
|
return result;
|
|
}
|