| 1 | /* It is important that this comes first to not hide effects introduced |
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| 2 | by other headers. */ |
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| 3 | #include <limits.h> |
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| 4 | |
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| 5 | #include <inttypes.h> |
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| 6 | #include <stdio.h> |
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| 7 | |
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| 8 | |
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| 9 | static long long int |
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| 10 | bitval (int bits) |
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| 11 | { |
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| 12 | long long int val = 0; |
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| 13 | while (bits-- > 0) |
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| 14 | val |= 1ll << bits; |
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| 15 | return val; |
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| 16 | } |
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| 17 | |
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| 18 | |
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| 19 | static int |
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| 20 | do_test (void) |
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| 21 | { |
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| 22 | int result = 0; |
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| 23 | |
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| 24 | #define TEST(name, format, expected) \ |
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| 25 | printf ("%-12s expected = %-20" format " actual = %" format "\n", \ |
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| 26 | #name ":", expected, name); \ |
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| 27 | result |= name != expected |
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| 28 | |
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| 29 | /* The limits from ISO C99. */ |
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| 30 | |
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| 31 | /* We cannot support anything but 8-bit chars. */ |
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| 32 | TEST (CHAR_BIT, "d" , 8); |
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| 33 | TEST (SCHAR_MIN, "d" , -128); |
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| 34 | TEST (SCHAR_MAX, "d" , 127); |
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| 35 | TEST (UCHAR_MAX, "d" , 255); |
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| 36 | |
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| 37 | TEST (SHRT_MIN, "d" , -(1 << (sizeof (short int) * CHAR_BIT - 1))); |
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| 38 | TEST (SHRT_MAX, "d" , (1 << (sizeof (short int) * CHAR_BIT - 1)) - 1); |
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| 39 | TEST (USHRT_MAX, "d" , (1 << sizeof (short int) * CHAR_BIT) - 1); |
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| 40 | |
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| 41 | TEST (INT_MIN, "d" , (int) -bitval (sizeof (int) * CHAR_BIT - 1) - 1); |
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| 42 | TEST (INT_MAX, "d" , (int) bitval (sizeof (int) * CHAR_BIT - 1)); |
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| 43 | TEST (UINT_MAX, "u" , |
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| 44 | (unsigned int) bitval (sizeof (unsigned int) * CHAR_BIT)); |
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| 45 | |
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| 46 | TEST (LONG_MIN, "ld" , |
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| 47 | (long int) -bitval (sizeof (long int) * CHAR_BIT - 1) - 1); |
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| 48 | TEST (LONG_MAX, "ld" , (long int) bitval (sizeof (long int) * CHAR_BIT - 1)); |
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| 49 | TEST (ULONG_MAX, "lu" , |
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| 50 | (unsigned long int) bitval (sizeof (unsigned long int) * CHAR_BIT)); |
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| 51 | |
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| 52 | TEST (LLONG_MIN, "lld" , -bitval (sizeof (long long int) * CHAR_BIT - 1) - 1); |
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| 53 | TEST (LLONG_MAX, "lld" , bitval (sizeof (long long int) * CHAR_BIT - 1)); |
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| 54 | TEST (ULLONG_MAX, "llu" , |
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| 55 | (unsigned long long int) bitval (sizeof (unsigned long long int) |
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| 56 | * CHAR_BIT)); |
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| 57 | |
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| 58 | /* Values from POSIX and Unix. */ |
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| 59 | #ifdef PAGESIZE |
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| 60 | TEST (PAGESIZE, "d" , getpagesize ()); |
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| 61 | #elif defined (PAGE_SIZE) |
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| 62 | TEST (PAGE_SIZE, "d" , getpagesize ()); |
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| 63 | #endif |
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| 64 | |
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| 65 | TEST (WORD_BIT, "d" , (int) sizeof (int) * CHAR_BIT); |
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| 66 | TEST (LONG_BIT, "d" , (int) sizeof (long int) * CHAR_BIT); |
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| 67 | |
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| 68 | return result; |
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| 69 | } |
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| 70 | |
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| 71 | #define TEST_FUNCTION do_test () |
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| 72 | #include "../test-skeleton.c" |
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| 73 | |
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