forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
/
myobject.cc
150 lines (110 loc) · 4.12 KB
/
myobject.cc
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
#include "myobject.h"
#include "../common.h"
napi_ref MyObject::constructor;
MyObject::MyObject(double value)
: value_(value), env_(nullptr), wrapper_(nullptr) {}
MyObject::~MyObject() { napi_delete_reference(env_, wrapper_); }
void MyObject::Destructor(
napi_env env, void* nativeObject, void* /*finalize_hint*/) {
MyObject* obj = static_cast<MyObject*>(nativeObject);
delete obj;
}
void MyObject::Init(napi_env env, napi_value exports) {
napi_property_descriptor properties[] = {
{ "value", nullptr, nullptr, GetValue, SetValue, 0, napi_default, 0 },
DECLARE_NAPI_PROPERTY("plusOne", PlusOne),
DECLARE_NAPI_PROPERTY("multiply", Multiply),
};
napi_value cons;
NAPI_CALL_RETURN_VOID(env, napi_define_class(
env, "MyObject", -1, New, nullptr, 3, properties, &cons));
NAPI_CALL_RETURN_VOID(env, napi_create_reference(env, cons, 1, &constructor));
NAPI_CALL_RETURN_VOID(env,
napi_set_named_property(env, exports, "MyObject", cons));
}
napi_value MyObject::New(napi_env env, napi_callback_info info) {
napi_value new_target;
NAPI_CALL(env, napi_get_new_target(env, info, &new_target));
bool is_constructor = (new_target != nullptr);
size_t argc = 1;
napi_value args[1];
napi_value _this;
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
if (is_constructor) {
// Invoked as constructor: `new MyObject(...)`
double value = 0;
napi_valuetype valuetype;
NAPI_CALL(env, napi_typeof(env, args[0], &valuetype));
if (valuetype != napi_undefined) {
NAPI_CALL(env, napi_get_value_double(env, args[0], &value));
}
MyObject* obj = new MyObject(value);
obj->env_ = env;
NAPI_CALL(env, napi_wrap(env,
_this,
obj,
MyObject::Destructor,
nullptr, // finalize_hint
&obj->wrapper_));
return _this;
}
// Invoked as plain function `MyObject(...)`, turn into construct call.
argc = 1;
napi_value argv[1] = {args[0]};
napi_value cons;
NAPI_CALL(env, napi_get_reference_value(env, constructor, &cons));
napi_value instance;
NAPI_CALL(env, napi_new_instance(env, cons, argc, argv, &instance));
return instance;
}
napi_value MyObject::GetValue(napi_env env, napi_callback_info info) {
napi_value _this;
NAPI_CALL(env,
napi_get_cb_info(env, info, nullptr, nullptr, &_this, nullptr));
MyObject* obj;
NAPI_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
napi_value num;
NAPI_CALL(env, napi_create_double(env, obj->value_, &num));
return num;
}
napi_value MyObject::SetValue(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
napi_value _this;
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
MyObject* obj;
NAPI_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
NAPI_CALL(env, napi_get_value_double(env, args[0], &obj->value_));
return nullptr;
}
napi_value MyObject::PlusOne(napi_env env, napi_callback_info info) {
napi_value _this;
NAPI_CALL(env,
napi_get_cb_info(env, info, nullptr, nullptr, &_this, nullptr));
MyObject* obj;
NAPI_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
obj->value_ += 1;
napi_value num;
NAPI_CALL(env, napi_create_double(env, obj->value_, &num));
return num;
}
napi_value MyObject::Multiply(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
napi_value _this;
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
double multiple = 1;
if (argc >= 1) {
NAPI_CALL(env, napi_get_value_double(env, args[0], &multiple));
}
MyObject* obj;
NAPI_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
napi_value cons;
NAPI_CALL(env, napi_get_reference_value(env, constructor, &cons));
const int kArgCount = 1;
napi_value argv[kArgCount];
NAPI_CALL(env, napi_create_double(env, obj->value_ * multiple, argv));
napi_value instance;
NAPI_CALL(env, napi_new_instance(env, cons, kArgCount, argv, &instance));
return instance;
}