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node-api: use WriteV2 in napi_get_value_string_utf16 #58165

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Merged
merged 1 commit into from
May 16, 2025
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node-api: use WriteV2 in napi_get_value_string_utf16 #58165

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18 changes: 10 additions & 8 deletions src/js_native_api_v8.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -2520,21 +2520,23 @@ napi_status NAPI_CDECL napi_get_value_string_utf16(napi_env env,

v8::Local<v8::Value> val = v8impl::V8LocalValueFromJsValue(value);
RETURN_STATUS_IF_FALSE(env, val->IsString(), napi_string_expected);
v8::Local<v8::String> str = val.As<v8::String>();

if (!buf) {
CHECK_ARG(env, result);
// V8 assumes UTF-16 length is the same as the number of characters.
*result = val.As<v8::String>()->Length();
*result = str->Length();
} else if (bufsize != 0) {
int copied = val.As<v8::String>()->Write(env->isolate,
reinterpret_cast<uint16_t*>(buf),
0,
bufsize - 1,
v8::String::NO_NULL_TERMINATION);
uint32_t length = static_cast<uint32_t>(
std::min(bufsize - 1, static_cast<size_t>(str->Length())));
str->WriteV2(env->isolate,
0,
length,
reinterpret_cast<uint16_t*>(buf),
v8::String::WriteFlags::kNullTerminate);

buf[copied] = '\0';
if (result != nullptr) {
*result = copied;
*result = length;
}
} else if (result != nullptr) {
*result = 0;
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