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
151
152
153
154
155
156
157
158
159
160
|
#include <stdlib.h>
#include <string.h>
#include <node_api.h>
#define JS_ASSERT(env, assertion, message) \
if (!(assertion)) { \
napi_throw_error( \
(env), \
"assertion (" #assertion ") failed: " message); \
return; \
}
#define NAPI_CALL(env, theCall) \
if ((theCall) != napi_ok) { \
const napi_extended_error_info* error; \
napi_get_last_error_info((env), &error); \
const char* errorMessage = error->error_message; \
errorMessage = errorMessage ? errorMessage : "empty error message"; \
napi_throw_error((env), errorMessage); \
return; \
}
static const char theText[] =
"Lorem ipsum dolor sit amet, consectetur adipiscing elit.";
static int deleterCallCount = 0;
static void deleteTheText(napi_env env, void* data, void* finalize_hint) {
JS_ASSERT(env, data != NULL && strcmp(data, theText) == 0, "invalid data");
(void)finalize_hint;
free(data);
deleterCallCount++;
}
static void noopDeleter(napi_env env, void* data, void* finalize_hint) {
JS_ASSERT(env, data != NULL && strcmp(data, theText) == 0, "invalid data");
(void)finalize_hint;
deleterCallCount++;
}
void newBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
char* theCopy;
const unsigned int kBufferSize = sizeof(theText);
NAPI_CALL(env,
napi_create_buffer(
env,
sizeof(theText),
(void**)(&theCopy),
&theBuffer));
JS_ASSERT(env, theCopy, "Failed to copy static text for newBuffer");
memcpy(theCopy, theText, kBufferSize);
NAPI_CALL(env, napi_set_return_value(env, info, theBuffer));
}
void newExternalBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
char* theCopy = strdup(theText);
JS_ASSERT(env, theCopy, "Failed to copy static text for newExternalBuffer");
NAPI_CALL(env,
napi_create_external_buffer(
env,
sizeof(theText),
theCopy,
deleteTheText,
NULL, // finalize_hint
&theBuffer));
NAPI_CALL(env, napi_set_return_value(env, info, theBuffer));
}
void getDeleterCallCount(napi_env env, napi_callback_info info) {
napi_value callCount;
NAPI_CALL(env, napi_create_number(env, deleterCallCount, &callCount));
NAPI_CALL(env, napi_set_return_value(env, info, callCount));
}
void copyBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
NAPI_CALL(env, napi_create_buffer_copy(
env, sizeof(theText), theText, NULL, &theBuffer));
NAPI_CALL(env, napi_set_return_value(env, info, theBuffer));
}
void bufferHasInstance(napi_env env, napi_callback_info info) {
size_t argc;
NAPI_CALL(env, napi_get_cb_args_length(env, info, &argc));
JS_ASSERT(env, argc == 1, "Wrong number of arguments");
napi_value theBuffer;
NAPI_CALL(env, napi_get_cb_args(env, info, &theBuffer, 1));
bool hasInstance;
napi_valuetype theType;
NAPI_CALL(env, napi_typeof(env, theBuffer, &theType));
JS_ASSERT(env,
theType == napi_object,
"bufferHasInstance: instance is not an object");
NAPI_CALL(env, napi_is_buffer(env, theBuffer, &hasInstance));
JS_ASSERT(env, hasInstance, "bufferHasInstance: instance is not a buffer");
napi_value returnValue;
NAPI_CALL(env, napi_get_boolean(env, hasInstance, &returnValue));
NAPI_CALL(env, napi_set_return_value(env, info, returnValue));
}
void bufferInfo(napi_env env, napi_callback_info info) {
size_t argc;
NAPI_CALL(env, napi_get_cb_args_length(env, info, &argc));
JS_ASSERT(env, argc == 1, "Wrong number of arguments");
napi_value theBuffer, returnValue;
NAPI_CALL(env, napi_get_cb_args(env, info, &theBuffer, 1));
char* bufferData;
size_t bufferLength;
NAPI_CALL(env,
napi_get_buffer_info(
env,
theBuffer,
(void**)(&bufferData),
&bufferLength));
NAPI_CALL(env, napi_get_boolean(env,
!strcmp(bufferData, theText) && bufferLength == sizeof(theText),
&returnValue));
NAPI_CALL(env, napi_set_return_value(env, info, returnValue));
}
void staticBuffer(napi_env env, napi_callback_info info) {
napi_value theBuffer;
NAPI_CALL(
env,
napi_create_external_buffer(env,
sizeof(theText),
(void*)theText,
noopDeleter,
NULL, // finalize_hint
&theBuffer));
NAPI_CALL(env, napi_set_return_value(env, info, theBuffer));
}
#define DECLARE_NAPI_METHOD(name, func) \
{ name, func, 0, 0, 0, napi_default, 0 }
void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
napi_value theValue;
NAPI_CALL(env, napi_create_string_utf8(env,
theText, sizeof(theText), &theValue));
NAPI_CALL(env, napi_set_named_property(env, exports, "theText", theValue));
napi_property_descriptor methods[] = {
DECLARE_NAPI_METHOD("newBuffer", newBuffer),
DECLARE_NAPI_METHOD("newExternalBuffer", newExternalBuffer),
DECLARE_NAPI_METHOD("getDeleterCallCount", getDeleterCallCount),
DECLARE_NAPI_METHOD("copyBuffer", copyBuffer),
DECLARE_NAPI_METHOD("bufferHasInstance", bufferHasInstance),
DECLARE_NAPI_METHOD("bufferInfo", bufferInfo),
DECLARE_NAPI_METHOD("staticBuffer", staticBuffer),
};
NAPI_CALL(env,
napi_define_properties(
env, exports, sizeof(methods) / sizeof(methods[0]), methods));
}
NAPI_MODULE(addon, Init)
|
