1 // -*- C++ -*-
2 //===--------------------------- limits.h ---------------------------------===//
3 //
4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
5 // See https://llvm.org/LICENSE.txt for license information.
6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
7 //
8 //===----------------------------------------------------------------------===//
9 
10 #ifndef _LIBCPP_LIMITS_H
11 #define _LIBCPP_LIMITS_H
12 
13 /*
14     limits.h synopsis
15 
16 Macros:
17 
18     CHAR_BIT
19     SCHAR_MIN
20     SCHAR_MAX
21     UCHAR_MAX
22     CHAR_MIN
23     CHAR_MAX
24     MB_LEN_MAX
25     SHRT_MIN
26     SHRT_MAX
27     USHRT_MAX
28     INT_MIN
29     INT_MAX
30     UINT_MAX
31     LONG_MIN
32     LONG_MAX
33     ULONG_MAX
34     LLONG_MIN   // C99
35     LLONG_MAX   // C99
36     ULLONG_MAX  // C99
37 
38 */
39 
40 #include <__config>
41 
42 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
43 #pragma GCC system_header
44 #endif
45 
46 #ifndef __GNUC__
47 #include_next <limits.h>
48 #else
49 // GCC header limits.h recursively includes itself through another header called
50 // syslimits.h for some reason. This setup breaks down if we directly
51 // #include_next GCC's limits.h (reasons not entirely clear to me). Therefore,
52 // we manually re-create the necessary include sequence below:
53 
54 // Get the system limits.h defines (force recurse into the next level)
55 #define _GCC_LIMITS_H_
56 #define _GCC_NEXT_LIMITS_H
57 #include_next <limits.h>
58 
59 // Get the ISO C defines
60 #undef _GCC_LIMITS_H_
61 #include_next <limits.h>
62 #endif // __GNUC__
63 
64 #endif  // _LIBCPP_LIMITS_H
65