1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
|
/**
* @file defines.h
*
* Macro definitions used throughout the prism library.
*
* This file should be included first by any *.h or *.c in prism for consistency
* and to ensure that the macros are defined before they are used.
*/
#ifndef PRISM_DEFINES_H
#define PRISM_DEFINES_H
#include <ctype.h>
#include <stdarg.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <string.h>
/**
* By default, we compile with -fvisibility=hidden. When this is enabled, we
* need to mark certain functions as being publically-visible. This macro does
* that in a compiler-agnostic way.
*/
#ifndef PRISM_EXPORTED_FUNCTION
# ifdef PRISM_EXPORT_SYMBOLS
# ifdef _WIN32
# define PRISM_EXPORTED_FUNCTION __declspec(dllexport) extern
# else
# define PRISM_EXPORTED_FUNCTION __attribute__((__visibility__("default"))) extern
# endif
# else
# define PRISM_EXPORTED_FUNCTION
# endif
#endif
/**
* Certain compilers support specifying that a function accepts variadic
* parameters that look like printf format strings to provide a better developer
* experience when someone is using the function. This macro does that in a
* compiler-agnostic way.
*/
#if defined(__GNUC__)
# define PRISM_ATTRIBUTE_FORMAT(string_index, argument_index) __attribute__((format(printf, string_index, argument_index)))
#elif defined(__clang__)
# define PRISM_ATTRIBUTE_FORMAT(string_index, argument_index) __attribute__((__format__(__printf__, string_index, argument_index)))
#else
# define PRISM_ATTRIBUTE_FORMAT(string_index, argument_index)
#endif
/**
* GCC will warn if you specify a function or parameter that is unused at
* runtime. This macro allows you to mark a function or parameter as unused in a
* compiler-agnostic way.
*/
#if defined(__GNUC__)
# define PRISM_ATTRIBUTE_UNUSED __attribute__((unused))
#else
# define PRISM_ATTRIBUTE_UNUSED
#endif
/**
* Old Visual Studio versions do not support the inline keyword, so we need to
* define it to be __inline.
*/
#if defined(_MSC_VER) && !defined(inline)
# define inline __inline
#endif
/**
* Old Visual Studio versions before 2015 do not implement sprintf, but instead
* implement _snprintf. We standard that here.
*/
#if !defined(snprintf) && defined(_MSC_VER) && (_MSC_VER < 1900)
# define snprintf _snprintf
#endif
/**
* A simple utility macro to concatenate two tokens together, necessary when one
* of the tokens is itself a macro.
*/
#define PM_CONCATENATE(left, right) left ## right
/**
* We want to be able to use static assertions, but they weren't standardized
* until C11. As such, we polyfill it here by making a hacky typedef that will
* fail to compile due to a negative array size if the condition is false.
*/
#if defined(_Static_assert)
# define PM_STATIC_ASSERT(line, condition, message) _Static_assert(condition, message)
#else
# define PM_STATIC_ASSERT(line, condition, message) typedef char PM_CONCATENATE(static_assert_, line)[(condition) ? 1 : -1]
#endif
#endif
|
