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/* 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;
}
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