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
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150

// common macros
#[macro_export]
macro_rules! napi_module {
    ($init:ident) => {
        #[no_mangle]
        pub unsafe extern "C" fn napi_register_module_v1(
            env: $crate::api::napi_env,
            exports: $crate::api::napi_value,
        ) -> $crate::api::napi_value {
            let env = $crate::env::NapiEnv::from_raw(env);
            let exports = $crate::value::JsObject::from_raw(env, exports);

            // TODO: deal with exception
            match std::panic::catch_unwind(move || $init(env, exports)) {
                Ok(Ok(_)) => {}
                Ok(Err(e)) => {
                    env.throw_error(format!("napi: {:?}", e)).unwrap();
                }
                Err(e) => {
                    env.throw_error(format!("panic: {:?}", e)).unwrap();
                }
            }

            exports.raw()
        }
    };
}

#[macro_export]
macro_rules! napi_call {
    // [out] result: napi function which has output
    (=$napi:ident, $($args:expr),+ $(,)?) => {
        unsafe {
            let mut result = std::mem::MaybeUninit::uninit();
            let status = $crate::api::$napi($($args),+, result.as_mut_ptr());
            if status.err() {
                return Err(status);
            }
            result.assume_init()
        }
    };

    (?$napi:ident, $($args:expr),+ $(,)?) => {
        unsafe {
            let mut result = std::mem::MaybeUninit::uninit();
            let status = $crate::api::$napi($($args),+, result.as_mut_ptr());
            (status, result.assume_init())
        }
    };

    ($napi:ident, $($args:expr),+ $(,)?) => {
        unsafe {
            let status = $crate::api::$napi($($args),+);
            if status.err() {
                return Err(status);
            } else {
                NapiResult::Ok(())
            }
        }
    }
}

#[macro_export]
macro_rules! napi_guard {
    ($version:expr) => {
        assert!(
            $version >= $crate::napi_version_guard(),
            "Oops, your node(napi {}) is too old to support napi >= {}",
            $version,
            $crate::napi_version_guard(),
        );
    };
}

#[macro_export]
macro_rules! napi_from_raw {
    ($T:ident) => {
        fn from_raw(env: $crate::env::NapiEnv, raw: $crate::api::napi_value) -> $T {
            $T($crate::value::JsValue(env, raw))
        }
    };
}

#[macro_export]
macro_rules! napi_get_value {
    ($T:ident) => {
        fn value(&self) -> $crate::value::JsValue {
            self.0
        }
    };
}

#[macro_export]
macro_rules! napi_value_t {
    ($T:ident) => {
        impl $crate::value::NapiValueT for $T {
            napi_from_raw!($T);
            napi_get_value!($T);
        }
    };
}

#[macro_export]
macro_rules! napi_s {
    ($s:expr) => {
        std::ffi::CString::new($s).map_err(|_| $crate::NapiStatus::StringExpected)
    };
}

#[macro_export]
macro_rules! napi_r {
    ($env:ident, =$s:expr) => {
        match $s {
            Ok(result) => result.raw(),
            Err(err) => {
                $env.throw_error(format!("{}", err)).unwrap();
                $env.undefined().unwrap().raw()
            }
        }
    };

    ($env:ident, $s:expr) => {
        match $s {
            Ok(result) => $env.undefined().unwrap().raw(),
            Err(err) => {
                $env.throw_error(format!("{}", err)).unwrap();
                $env.undefined().unwrap().raw()
            }
        }
    };
}

#[macro_export]
macro_rules! napi_as {
    ($self:ident, $T:ty, $err:expr) => {{
        let casted = unsafe { $self.cast::<$T>() };
        if $self.check()? {
            Ok(casted)
        } else {
            Err($err)
        }
    }};
}

#[macro_export]
macro_rules! napi_is {
    ($self:ident, $T:ty) => {
        unsafe { $self.cast::<$T>() }.check()
    };
}