mirror of https://github.com/nodejs/node.git
102 lines
3.2 KiB
C
102 lines
3.2 KiB
C
#include <js_native_api.h>
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#include <string.h>
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#include "../common.h"
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static napi_value CreateDataView(napi_env env, napi_callback_info info) {
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size_t argc = 3;
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napi_value args [3];
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NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
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NAPI_ASSERT(env, argc == 3, "Wrong number of arguments");
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napi_valuetype valuetype0;
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napi_value arraybuffer = args[0];
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NAPI_CALL(env, napi_typeof(env, arraybuffer, &valuetype0));
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NAPI_ASSERT(env, valuetype0 == napi_object,
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"Wrong type of arguments. Expects a ArrayBuffer as the first "
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"argument.");
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bool is_arraybuffer;
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NAPI_CALL(env, napi_is_arraybuffer(env, arraybuffer, &is_arraybuffer));
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NAPI_ASSERT(env, is_arraybuffer,
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"Wrong type of arguments. Expects a ArrayBuffer as the first "
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"argument.");
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napi_valuetype valuetype1;
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NAPI_CALL(env, napi_typeof(env, args[1], &valuetype1));
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NAPI_ASSERT(env, valuetype1 == napi_number,
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"Wrong type of arguments. Expects a number as second argument.");
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size_t byte_offset = 0;
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NAPI_CALL(env, napi_get_value_uint32(env, args[1], (uint32_t*)(&byte_offset)));
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napi_valuetype valuetype2;
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NAPI_CALL(env, napi_typeof(env, args[2], &valuetype2));
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NAPI_ASSERT(env, valuetype2 == napi_number,
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"Wrong type of arguments. Expects a number as third argument.");
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size_t length = 0;
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NAPI_CALL(env, napi_get_value_uint32(env, args[2], (uint32_t*)(&length)));
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napi_value output_dataview;
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NAPI_CALL(env,
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napi_create_dataview(env, length, arraybuffer,
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byte_offset, &output_dataview));
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return output_dataview;
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}
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static napi_value CreateDataViewFromJSDataView(napi_env env, napi_callback_info info) {
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size_t argc = 1;
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napi_value args [1];
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NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
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NAPI_ASSERT(env, argc == 1, "Wrong number of arguments");
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napi_valuetype valuetype;
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napi_value input_dataview = args[0];
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NAPI_CALL(env, napi_typeof(env, input_dataview, &valuetype));
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NAPI_ASSERT(env, valuetype == napi_object,
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"Wrong type of arguments. Expects a DataView as the first "
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"argument.");
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bool is_dataview;
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NAPI_CALL(env, napi_is_dataview(env, input_dataview, &is_dataview));
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NAPI_ASSERT(env, is_dataview,
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"Wrong type of arguments. Expects a DataView as the first "
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"argument.");
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size_t byte_offset = 0;
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size_t length = 0;
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napi_value buffer;
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NAPI_CALL(env,
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napi_get_dataview_info(env, input_dataview, &length, NULL,
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&buffer, &byte_offset));
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napi_value output_dataview;
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NAPI_CALL(env,
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napi_create_dataview(env, length, buffer,
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byte_offset, &output_dataview));
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return output_dataview;
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}
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EXTERN_C_START
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napi_value Init(napi_env env, napi_value exports) {
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napi_property_descriptor descriptors[] = {
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DECLARE_NAPI_PROPERTY("CreateDataView", CreateDataView),
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DECLARE_NAPI_PROPERTY("CreateDataViewFromJSDataView",
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CreateDataViewFromJSDataView)
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};
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NAPI_CALL(env, napi_define_properties(
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env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
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return exports;
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}
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EXTERN_C_END
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