| 1 | /*
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| 2 | * Copyright (c) 2017 Jiri Svoboda
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| 3 | * All rights reserved.
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| 4 | *
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| 5 | * Redistribution and use in source and binary forms, with or without
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| 6 | * modification, are permitted provided that the following conditions
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| 7 | * are met:
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| 8 | *
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| 9 | * - Redistributions of source code must retain the above copyright
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| 10 | * notice, this list of conditions and the following disclaimer.
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| 11 | * - Redistributions in binary form must reproduce the above copyright
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| 12 | * notice, this list of conditions and the following disclaimer in the
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| 13 | * documentation and/or other materials provided with the distribution.
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| 14 | * - The name of the author may not be used to endorse or promote products
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| 15 | * derived from this software without specific prior written permission.
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| 16 | *
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| 17 | * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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| 18 | * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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| 19 | * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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| 20 | * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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| 21 | * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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| 22 | * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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| 23 | * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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| 24 | * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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| 25 | * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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| 26 | * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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| 27 | */
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| 28 |
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| 29 | /** @addtogroup libc
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| 30 | * @{
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| 31 | */
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| 32 | /** @file
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| 33 | */
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| 34 |
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| 35 | #ifndef LIBC_LIMITS_H_
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| 36 | #define LIBC_LIMITS_H_
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| 37 |
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| 38 | #ifdef __GNUC__
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| 39 | /*
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| 40 | * Default to compiler's version of limits.h, so we don't have to care about
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| 41 | * language version and whatnot.
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| 42 | */
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| 43 | #include_next <limits.h>
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| 44 | #else
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| 45 |
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| 46 | /* HelenOS requires 8-bit char and two's complement arithmetic. */
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| 47 | #define CHAR_BIT 8
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| 48 | #define SCHAR_MAX 0x7f
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| 49 | #define SCHAR_MIN (-SCHAR_MAX - 1)
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| 50 | #define SHRT_MAX 0x7fff
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| 51 | #define SHRT_MIN (-SHRT_MAX - 1)
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| 52 | #define INT_MAX 0x7fffffff
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| 53 | #define INT_MIN (-INT_MAX - 1)
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| 54 | #define LLONG_MAX 0x7fffffffffffffffll
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| 55 | #define LLONG_MIN (-LLONG_MAX - 1)
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| 56 |
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| 57 | #define UCHAR_MAX 0xff
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| 58 | #define USHRT_MAX 0xffff
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| 59 | #define UINT_MAX 0xffffffffu
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| 60 | #define ULLONG_MAX 0xffffffffffffffffull
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| 61 |
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| 62 | #if __STDC_VERSION__ >= 201112L
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| 63 | _Static_assert(((char)-1) < 0, "char should be signed");
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| 64 | #endif
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| 65 |
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| 66 | #define CHAR_MAX SCHAR_MAX
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| 67 | #define CHAR_MIN SCHAR_MIN
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| 68 |
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| 69 | #ifdef __32_BITS__
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| 70 | #define LONG_MAX 0x7fffffffl
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| 71 | #define LONG_MIN (-LONG_MAX - 1)
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| 72 | #define ULONG_MAX 0xfffffffful
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| 73 | #endif
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| 74 |
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| 75 | #ifdef __64_BITS__
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| 76 | #define LONG_MAX 0x7fffffffffffffffl
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| 77 | #define LONG_MIN (-LONG_MAX - 1)
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| 78 | #define ULONG_MAX 0xfffffffffffffffful
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| 79 | #endif
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| 80 |
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| 81 | #endif /* !defined(__GNUC__) */
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| 82 |
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| 83 | #undef MB_LEN_MAX
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| 84 | #define MB_LEN_MAX 4
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| 85 |
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| 86 | #define UCHAR_MIN 0
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| 87 | #define USHRT_MIN 0
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| 88 | #define UINT_MIN (0u)
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| 89 | #define ULONG_MIN (0ul)
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| 90 | #define ULLONG_MIN (0ull)
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| 91 |
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| 92 | /* GCC's <limits.h> doesn't define these for C++11, even though it should. */
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| 93 | #if __cplusplus >= 201103L
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| 94 | #ifndef LLONG_MAX
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| 95 | #define LLONG_MAX 0x7fffffffffffffffll
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| 96 | #endif
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| 97 | #ifndef LLONG_MIN
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| 98 | #define LLONG_MIN (-LLONG_MAX - 1)
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| 99 | #endif
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| 100 | #ifndef ULLONG_MAX
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| 101 | #define ULLONG_MAX 0xffffffffffffffffull
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| 102 | #endif
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| 103 | #endif
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| 104 |
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| 105 | #endif
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| 106 |
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| 107 | /** @}
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| 108 | */
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