| Chandan Uddaraju | f72ce81 | 2009-11-21 10:31:02 -0800 | [diff] [blame] | 1 | /* This administrivia gets added to the beginning of limits.h |
| 2 | if the system has its own version of limits.h. */ |
| 3 | |
| 4 | /* We use _GCC_LIMITS_H_ because we want this not to match |
| 5 | any macros that the system's limits.h uses for its own purposes. */ |
| 6 | #ifndef _GCC_LIMITS_H_ /* Terminated in limity.h. */ |
| 7 | #define _GCC_LIMITS_H_ |
| 8 | |
| 9 | #ifndef _LIMITS_H___ |
| 10 | #define _LIMITS_H___ |
| 11 | |
| 12 | /* Number of bits in a `char'. */ |
| 13 | #undef CHAR_BIT |
| 14 | #define CHAR_BIT __CHAR_BIT__ |
| 15 | |
| 16 | /* Maximum length of a multibyte character. */ |
| 17 | #ifndef MB_LEN_MAX |
| 18 | #define MB_LEN_MAX 1 |
| 19 | #endif |
| 20 | |
| 21 | /* Minimum and maximum values a `signed char' can hold. */ |
| 22 | #undef SCHAR_MIN |
| 23 | #define SCHAR_MIN (-SCHAR_MAX - 1) |
| 24 | #undef SCHAR_MAX |
| 25 | #define SCHAR_MAX __SCHAR_MAX__ |
| 26 | |
| 27 | /* Maximum value an `unsigned char' can hold. (Minimum is 0). */ |
| 28 | #undef UCHAR_MAX |
| 29 | #if __SCHAR_MAX__ == __INT_MAX__ |
| 30 | # define UCHAR_MAX (SCHAR_MAX * 2U + 1U) |
| 31 | #else |
| 32 | # define UCHAR_MAX (SCHAR_MAX * 2 + 1) |
| 33 | #endif |
| 34 | |
| 35 | /* Minimum and maximum values a `char' can hold. */ |
| 36 | #ifdef __CHAR_UNSIGNED__ |
| 37 | # undef CHAR_MIN |
| 38 | # if __SCHAR_MAX__ == __INT_MAX__ |
| 39 | # define CHAR_MIN 0U |
| 40 | # else |
| 41 | # define CHAR_MIN 0 |
| 42 | # endif |
| 43 | # undef CHAR_MAX |
| 44 | # define CHAR_MAX UCHAR_MAX |
| 45 | #else |
| 46 | # undef CHAR_MIN |
| 47 | # define CHAR_MIN SCHAR_MIN |
| 48 | # undef CHAR_MAX |
| 49 | # define CHAR_MAX SCHAR_MAX |
| 50 | #endif |
| 51 | |
| 52 | /* Minimum and maximum values a `signed short int' can hold. */ |
| 53 | #undef SHRT_MIN |
| 54 | #define SHRT_MIN (-SHRT_MAX - 1) |
| 55 | #undef SHRT_MAX |
| 56 | #define SHRT_MAX __SHRT_MAX__ |
| 57 | |
| 58 | /* Maximum value an `unsigned short int' can hold. (Minimum is 0). */ |
| 59 | #undef USHRT_MAX |
| 60 | #if __SHRT_MAX__ == __INT_MAX__ |
| 61 | # define USHRT_MAX (SHRT_MAX * 2U + 1U) |
| 62 | #else |
| 63 | # define USHRT_MAX (SHRT_MAX * 2 + 1) |
| 64 | #endif |
| 65 | |
| 66 | /* Minimum and maximum values a `signed int' can hold. */ |
| 67 | #undef INT_MIN |
| 68 | #define INT_MIN (-INT_MAX - 1) |
| 69 | #undef INT_MAX |
| 70 | #define INT_MAX __INT_MAX__ |
| 71 | |
| 72 | /* Maximum value an `unsigned int' can hold. (Minimum is 0). */ |
| 73 | #undef UINT_MAX |
| 74 | #define UINT_MAX (INT_MAX * 2U + 1U) |
| 75 | |
| 76 | /* Minimum and maximum values a `signed long int' can hold. |
| 77 | (Same as `int'). */ |
| 78 | #undef LONG_MIN |
| 79 | #define LONG_MIN (-LONG_MAX - 1L) |
| 80 | #undef LONG_MAX |
| 81 | #define LONG_MAX __LONG_MAX__ |
| 82 | |
| 83 | /* Maximum value an `unsigned long int' can hold. (Minimum is 0). */ |
| 84 | #undef ULONG_MAX |
| 85 | #define ULONG_MAX (LONG_MAX * 2UL + 1UL) |
| 86 | |
| 87 | #if defined (__STDC_VERSION__) && __STDC_VERSION__ >= 199901L |
| 88 | /* Minimum and maximum values a `signed long long int' can hold. */ |
| 89 | # undef LLONG_MIN |
| 90 | # define LLONG_MIN (-LLONG_MAX - 1LL) |
| 91 | # undef LLONG_MAX |
| 92 | # define LLONG_MAX __LONG_LONG_MAX__ |
| 93 | |
| 94 | /* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */ |
| 95 | # undef ULLONG_MAX |
| 96 | # define ULLONG_MAX (LLONG_MAX * 2ULL + 1ULL) |
| 97 | #endif |
| 98 | |
| 99 | #if defined (__GNU_LIBRARY__) ? defined (__USE_GNU) : !defined (__STRICT_ANSI__) |
| 100 | /* Minimum and maximum values a `signed long long int' can hold. */ |
| 101 | # undef LONG_LONG_MIN |
| 102 | # define LONG_LONG_MIN (-LONG_LONG_MAX - 1LL) |
| 103 | # undef LONG_LONG_MAX |
| 104 | # define LONG_LONG_MAX __LONG_LONG_MAX__ |
| 105 | |
| 106 | /* Maximum value an `unsigned long long int' can hold. (Minimum is 0). */ |
| 107 | # undef ULONG_LONG_MAX |
| 108 | # define ULONG_LONG_MAX (LONG_LONG_MAX * 2ULL + 1ULL) |
| 109 | #endif |
| 110 | |
| 111 | #endif /* _LIMITS_H___ */ |
| 112 | /* This administrivia gets added to the end of limits.h |
| 113 | if the system has its own version of limits.h. */ |
| 114 | |
| 115 | #else /* not _GCC_LIMITS_H_ */ |
| 116 | |
| 117 | #ifdef _GCC_NEXT_LIMITS_H |
| 118 | #include_next <limits.h> /* recurse down to the real one */ |
| 119 | #endif |
| 120 | |
| 121 | #endif /* not _GCC_LIMITS_H_ */ |