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#include <node_api.h>
#include <string.h>
#include "../common.h"
napi_value Multiply(napi_env env, napi_callback_info info) {
size_t argc = 2;
napi_value args[2];
NAPI_CALL(env, napi_get_cb_info(env, info, &argc, args, NULL, NULL));
NAPI_ASSERT(env, argc == 2, "Wrong number of arguments");
napi_valuetype valuetype0;
NAPI_CALL(env, napi_typeof(env, args[0], &valuetype0));
NAPI_ASSERT(env, valuetype0 == napi_object,
"Wrong type of argments. Expects a typed array as first argument.");
napi_value input_array = args[0];
bool is_typedarray;
NAPI_CALL(env, napi_is_typedarray(env, input_array, &is_typedarray));
NAPI_ASSERT(env, is_typedarray,
"Wrong type of argments. Expects a typed array as first argument.");
napi_valuetype valuetype1;
NAPI_CALL(env, napi_typeof(env, args[1], &valuetype1));
NAPI_ASSERT(env, valuetype1 == napi_number,
"Wrong type of argments. Expects a number as second argument.");
double multiplier;
NAPI_CALL(env, napi_get_value_double(env, args[1], &multiplier));
napi_typedarray_type type;
napi_value input_buffer;
size_t byte_offset;
size_t i, length;
NAPI_CALL(env, napi_get_typedarray_info(
env, input_array, &type, &length, NULL, &input_buffer, &byte_offset));
void* data;
size_t byte_length;
NAPI_CALL(env, napi_get_arraybuffer_info(
env, input_buffer, &data, &byte_length));
napi_value output_buffer;
void* output_ptr = NULL;
NAPI_CALL(env, napi_create_arraybuffer(
env, byte_length, &output_ptr, &output_buffer));
napi_value output_array;
NAPI_CALL(env, napi_create_typedarray(
env, type, length, output_buffer, byte_offset, &output_array));
if (type == napi_uint8_array) {
uint8_t* input_bytes = (uint8_t*)(data) + byte_offset;
uint8_t* output_bytes = (uint8_t*)(output_ptr);
for (i = 0; i < length; i++) {
output_bytes[i] = (uint8_t)(input_bytes[i] * multiplier);
}
} else if (type == napi_float64_array) {
double* input_doubles = (double*)((uint8_t*)(data) + byte_offset);
double* output_doubles = (double*)(output_ptr);
for (i = 0; i < length; i++) {
output_doubles[i] = input_doubles[i] * multiplier;
}
} else {
napi_throw_error(env, "Typed array was of a type not expected by test.");
return NULL;
}
return output_array;
}
napi_value External(napi_env env, napi_callback_info info) {
static int8_t externalData[] = {0, 1, 2};
napi_value output_buffer;
NAPI_CALL(env, napi_create_external_arraybuffer(
env,
externalData,
sizeof(externalData),
NULL, // finalize_callback
NULL, // finalize_hint
&output_buffer));
napi_value output_array;
NAPI_CALL(env, napi_create_typedarray(env,
napi_int8_array,
sizeof(externalData) / sizeof(int8_t),
output_buffer,
0,
&output_array));
return output_array;
}
void Init(napi_env env, napi_value exports, napi_value module, void* priv) {
napi_property_descriptor descriptors[] = {
DECLARE_NAPI_PROPERTY("Multiply", Multiply),
DECLARE_NAPI_PROPERTY("External", External),
};
NAPI_CALL_RETURN_VOID(env, napi_define_properties(
env, exports, sizeof(descriptors) / sizeof(*descriptors), descriptors));
}
NAPI_MODULE(addon, Init)
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