ep_capstone/
macros.rs

1macro_rules! result {
2    ($error:expr, $good:expr) => {
3        match $error {
4            $crate::sys::Error(0) => Ok($good),
5
6            $crate::sys::Error(err) => {
7                Err($crate::Error::from_c(err).unwrap_or($crate::Error::Bindings))
8            }
9        }
10    };
11
12    ($error:expr) => {
13        result!($error, ())
14    };
15}
16
17macro_rules! c_enum {
18    (
19        $(#[$enum_meta:meta])*
20        $vis:vis enum $EnumName:ident: $Primitive:ident {
21            $(
22                $(#[$variant_meta:meta])*
23                $Variant:ident $(= $Value:expr)?
24            ),*
25            $(,)?
26        }
27    ) => {
28        $(#[$enum_meta])*
29        #[repr($Primitive)]
30        $vis enum $EnumName {
31            $(
32                $(#[$variant_meta])*
33                $Variant $(= $Value)?
34            ),*
35        }
36
37        impl $EnumName {
38            /// Converts this enum to its primitive value.
39            #[allow(dead_code)]
40            pub(crate) fn to_primitive(self) -> $Primitive {
41                self as $Primitive
42            }
43
44            /// Converts a primitive value to this enum.
45            #[allow(dead_code)]
46            pub(crate) fn from_primitive(primitive: $Primitive) -> Option<Self> {
47                match primitive {
48                    $( _ if primitive == Self::$Variant as $Primitive => Some(Self::$Variant) ,)*
49                    _ => None,
50                }
51            }
52
53            /// Converts this to its C value.
54            #[allow(dead_code)]
55            pub(crate) fn to_c(self) -> libc::c_int {
56                self as $Primitive as libc::c_int
57            }
58
59            /// Converts from a C value into this.
60            #[allow(dead_code)]
61            pub(crate) fn from_c(c: impl core::convert::TryInto<$Primitive>) -> Option<Self> {
62                if let Ok(v) = c.try_into() {
63                    Self::from_primitive(v)
64                } else {
65                    None
66                }
67            }
68        }
69    };
70}
71
72macro_rules! c_enum_big {
73    (
74        $(#[$enum_meta:meta])*
75        $vis:vis enum $EnumName:ident: $Primitive:ident {
76            @Start = $StartVariant:ident,
77            @End   = $EndVariant:ident,
78            $(
79                $(#[$variant_meta:meta])*
80                $Variant:ident $(= $Value:expr)?
81            ),*
82            $(,)?
83        }
84    ) => {
85        $(#[$enum_meta])*
86        #[repr($Primitive)]
87        $vis enum $EnumName {
88            $(
89                $(#[$variant_meta])*
90                $Variant $(= $Value)?
91            ),*
92        }
93
94        impl $EnumName {
95            /// Converts this enum to its primitive value.
96            #[allow(dead_code)]
97            pub(crate) fn to_primitive(self) -> $Primitive {
98                self as $Primitive
99            }
100
101            /// Converts a primitive value to this enum.
102            #[allow(dead_code)]
103            pub(crate) fn from_primitive(primitive: $Primitive) -> Option<Self> {
104                if primitive < $EnumName::$StartVariant as $Primitive || primitive >= $EnumName::$EndVariant as $Primitive {
105                    return None;
106                }
107                Some(unsafe { core::mem::transmute::<$Primitive, $EnumName>(primitive) })
108            }
109
110            /// Converts this to its C value.
111            #[allow(dead_code)]
112            pub(crate) fn to_c(self) -> libc::c_int {
113                self as $Primitive as libc::c_int
114            }
115
116            /// Converts from a C value into this.
117            #[allow(dead_code)]
118            pub(crate) fn from_c(c: impl core::convert::TryInto<$Primitive>) -> Option<Self> {
119                if let Ok(v) = c.try_into() {
120                    Self::from_primitive(v)
121                } else {
122                    None
123                }
124            }
125        }
126    };
127}
ep_capstone/macros.rs

ep_capstone/
macros.rs
