1 #include <js_native_api.h>
2 #include <string.h>
3 #include "../common.h"
4 #include "../entry_point.h"
5
CreateDataView(napi_env env,napi_callback_info info)6 static napi_value CreateDataView(napi_env env, napi_callback_info info) {
7 size_t argc = 3;
8 napi_value args [3];
9 NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
10
11 NODE_API_ASSERT(env, argc == 3, "Wrong number of arguments");
12
13 napi_valuetype valuetype0;
14 napi_value arraybuffer = args[0];
15
16 NODE_API_CALL(env, napi_typeof(env, arraybuffer, &valuetype0));
17 NODE_API_ASSERT(env, valuetype0 == napi_object,
18 "Wrong type of arguments. Expects a ArrayBuffer as the first "
19 "argument.");
20
21 bool is_arraybuffer;
22 NODE_API_CALL(env, napi_is_arraybuffer(env, arraybuffer, &is_arraybuffer));
23 NODE_API_ASSERT(env, is_arraybuffer,
24 "Wrong type of arguments. Expects a ArrayBuffer as the first "
25 "argument.");
26
27 napi_valuetype valuetype1;
28 NODE_API_CALL(env, napi_typeof(env, args[1], &valuetype1));
29
30 NODE_API_ASSERT(env, valuetype1 == napi_number,
31 "Wrong type of arguments. Expects a number as second argument.");
32
33 size_t byte_offset = 0;
34 NODE_API_CALL(env, napi_get_value_uint32(env, args[1], (uint32_t*)(&byte_offset)));
35
36 napi_valuetype valuetype2;
37 NODE_API_CALL(env, napi_typeof(env, args[2], &valuetype2));
38
39 NODE_API_ASSERT(env, valuetype2 == napi_number,
40 "Wrong type of arguments. Expects a number as third argument.");
41
42 size_t length = 0;
43 NODE_API_CALL(env, napi_get_value_uint32(env, args[2], (uint32_t*)(&length)));
44
45 napi_value output_dataview;
46 NODE_API_CALL(env,
47 napi_create_dataview(env, length, arraybuffer,
48 byte_offset, &output_dataview));
49
50 return output_dataview;
51 }
52
CreateDataViewFromJSDataView(napi_env env,napi_callback_info info)53 static napi_value CreateDataViewFromJSDataView(napi_env env, napi_callback_info info) {
54 size_t argc = 1;
55 napi_value args [1];
56 NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
57
58 NODE_API_ASSERT(env, argc == 1, "Wrong number of arguments");
59
60 napi_valuetype valuetype;
61 napi_value input_dataview = args[0];
62
63 NODE_API_CALL(env, napi_typeof(env, input_dataview, &valuetype));
64 NODE_API_ASSERT(env, valuetype == napi_object,
65 "Wrong type of arguments. Expects a DataView as the first "
66 "argument.");
67
68 bool is_dataview;
69 NODE_API_CALL(env, napi_is_dataview(env, input_dataview, &is_dataview));
70 NODE_API_ASSERT(env, is_dataview,
71 "Wrong type of arguments. Expects a DataView as the first "
72 "argument.");
73 size_t byte_offset = 0;
74 size_t length = 0;
75 napi_value buffer;
76 NODE_API_CALL(env,
77 napi_get_dataview_info(env, input_dataview, &length, NULL,
78 &buffer, &byte_offset));
79
80 napi_value output_dataview;
81 NODE_API_CALL(env,
82 napi_create_dataview(env, length, buffer,
83 byte_offset, &output_dataview));
84
85
86 return output_dataview;
87 }
88
89 EXTERN_C_START
Init(napi_env env,napi_value exports)90 napi_value Init(napi_env env, napi_value exports) {
91 napi_property_descriptor descriptors[] = {
92 DECLARE_NODE_API_PROPERTY("CreateDataView", CreateDataView),
93 DECLARE_NODE_API_PROPERTY("CreateDataViewFromJSDataView",
94 CreateDataViewFromJSDataView)
95 };
96
97 NODE_API_CALL(env, napi_define_properties(
98 env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
99
100 return exports;
101 }
102 EXTERN_C_END
103