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