LLVM  13.0.0git
DataTypes.h
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1 /*===-- include/llvm-c/DataTypes.h - Define fixed size types ------*- C -*-===*\
2 |* *|
3 |* Part of the LLVM Project, under the Apache License v2.0 with LLVM *|
4 |* 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 |* This file contains definitions to figure out the size of _HOST_ data types.*|
11 |* This file is important because different host OS's define different macros,*|
12 |* which makes portability tough. This file exports the following *|
13 |* definitions: *|
14 |* *|
15 |* [u]int(32|64)_t : typedefs for signed and unsigned 32/64 bit system types*|
16 |* [U]INT(8|16|32|64)_(MIN|MAX) : Constants for the min and max values. *|
17 |* *|
18 |* No library is required when using these functions. *|
19 |* *|
20 |*===----------------------------------------------------------------------===*/
21 
22 /* Please leave this file C-compatible. */
23 
24 #ifndef LLVM_C_DATATYPES_H
25 #define LLVM_C_DATATYPES_H
26 
27 #include <inttypes.h>
28 #include <stdint.h>
29 
30 #ifndef _MSC_VER
31 
32 #if !defined(UINT32_MAX)
33 # error "The standard header <cstdint> is not C++11 compliant. Must #define "\
34  "__STDC_LIMIT_MACROS before #including llvm-c/DataTypes.h"
35 #endif
36 
37 #if !defined(UINT32_C)
38 # error "The standard header <cstdint> is not C++11 compliant. Must #define "\
39  "__STDC_CONSTANT_MACROS before #including llvm-c/DataTypes.h"
40 #endif
41 
42 /* Note that <inttypes.h> includes <stdint.h>, if this is a C99 system. */
43 #include <sys/types.h>
44 
45 #ifdef _AIX
46 // GCC is strict about defining large constants: they must have LL modifier.
47 #undef INT64_MAX
48 #undef INT64_MIN
49 #endif
50 
51 #else /* _MSC_VER */
52 #ifdef __cplusplus
53 #include <cstddef>
54 #include <cstdlib>
55 #else
56 #include <stddef.h>
57 #include <stdlib.h>
58 #endif
59 #include <sys/types.h>
60 
61 #if defined(_WIN64)
62 typedef signed __int64 ssize_t;
63 #else
64 typedef signed int ssize_t;
65 #endif /* _WIN64 */
66 
67 #endif /* _MSC_VER */
68 
69 /* Set defaults for constants which we cannot find. */
70 #if !defined(INT64_MAX)
71 # define INT64_MAX 9223372036854775807LL
72 #endif
73 #if !defined(INT64_MIN)
74 # define INT64_MIN ((-INT64_MAX)-1)
75 #endif
76 #if !defined(UINT64_MAX)
77 # define UINT64_MAX 0xffffffffffffffffULL
78 #endif
79 
80 #endif /* LLVM_C_DATATYPES_H */