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encoding_binding.cc
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303 lines (251 loc) · 9.66 KB
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#include "encoding_binding.h"
#include "ada.h"
#include "env-inl.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "node_external_reference.h"
#include "simdutf.h"
#include "string_bytes.h"
#include "v8.h"
#include <cstdint>
namespace node {
namespace encoding_binding {
using v8::ArrayBuffer;
using v8::BackingStore;
using v8::BackingStoreInitializationMode;
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::HandleScope;
using v8::Isolate;
using v8::Local;
using v8::Object;
using v8::ObjectTemplate;
using v8::SnapshotCreator;
using v8::String;
using v8::Uint8Array;
using v8::Value;
void BindingData::MemoryInfo(MemoryTracker* tracker) const {
tracker->TrackField("encode_into_results_buffer",
encode_into_results_buffer_);
}
BindingData::BindingData(Realm* realm,
Local<Object> object,
InternalFieldInfo* info)
: SnapshotableObject(realm, object, type_int),
encode_into_results_buffer_(
realm->isolate(),
kEncodeIntoResultsLength,
MAYBE_FIELD_PTR(info, encode_into_results_buffer)) {
if (info == nullptr) {
object
->Set(realm->context(),
FIXED_ONE_BYTE_STRING(realm->isolate(), "encodeIntoResults"),
encode_into_results_buffer_.GetJSArray())
.Check();
} else {
encode_into_results_buffer_.Deserialize(realm->context());
}
encode_into_results_buffer_.MakeWeak();
}
bool BindingData::PrepareForSerialization(Local<Context> context,
SnapshotCreator* creator) {
DCHECK_NULL(internal_field_info_);
internal_field_info_ = InternalFieldInfoBase::New<InternalFieldInfo>(type());
internal_field_info_->encode_into_results_buffer =
encode_into_results_buffer_.Serialize(context, creator);
// Return true because we need to maintain the reference to the binding from
// JS land.
return true;
}
InternalFieldInfoBase* BindingData::Serialize(int index) {
DCHECK_IS_SNAPSHOT_SLOT(index);
InternalFieldInfo* info = internal_field_info_;
internal_field_info_ = nullptr;
return info;
}
void BindingData::Deserialize(Local<Context> context,
Local<Object> holder,
int index,
InternalFieldInfoBase* info) {
DCHECK_IS_SNAPSHOT_SLOT(index);
HandleScope scope(context->GetIsolate());
Realm* realm = Realm::GetCurrent(context);
// Recreate the buffer in the constructor.
InternalFieldInfo* casted_info = static_cast<InternalFieldInfo*>(info);
BindingData* binding =
realm->AddBindingData<BindingData>(holder, casted_info);
CHECK_NOT_NULL(binding);
}
void BindingData::EncodeInto(const FunctionCallbackInfo<Value>& args) {
CHECK_GE(args.Length(), 2);
CHECK(args[0]->IsString());
CHECK(args[1]->IsUint8Array());
Realm* realm = Realm::GetCurrent(args);
Isolate* isolate = realm->isolate();
BindingData* binding_data = realm->GetBindingData<BindingData>();
Local<String> source = args[0].As<String>();
Local<Uint8Array> dest = args[1].As<Uint8Array>();
Local<ArrayBuffer> buf = dest->Buffer();
char* write_result = static_cast<char*>(buf->Data()) + dest->ByteOffset();
size_t dest_length = dest->ByteLength();
size_t nchars;
size_t written = source->WriteUtf8V2(isolate,
write_result,
dest_length,
String::WriteFlags::kReplaceInvalidUtf8,
&nchars);
binding_data->encode_into_results_buffer_[0] = nchars;
binding_data->encode_into_results_buffer_[1] = written;
}
// Encode a single string to a UTF-8 Uint8Array (not Buffer).
// Used in TextEncoder.prototype.encode.
void BindingData::EncodeUtf8String(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
Isolate* isolate = env->isolate();
CHECK_GE(args.Length(), 1);
CHECK(args[0]->IsString());
Local<String> str = args[0].As<String>();
size_t length = str->Utf8LengthV2(isolate);
Local<ArrayBuffer> ab;
{
std::unique_ptr<BackingStore> bs = ArrayBuffer::NewBackingStore(
isolate, length, BackingStoreInitializationMode::kUninitialized);
CHECK(bs);
// We are certain that `data` is sufficiently large
str->WriteUtf8V2(isolate,
static_cast<char*>(bs->Data()),
bs->MaxByteLength(),
String::WriteFlags::kReplaceInvalidUtf8);
ab = ArrayBuffer::New(isolate, std::move(bs));
}
args.GetReturnValue().Set(Uint8Array::New(ab, 0, length));
}
// Convert the input into an encoded string
void BindingData::DecodeUTF8(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args); // list, flags
CHECK_GE(args.Length(), 1);
if (!(args[0]->IsArrayBuffer() || args[0]->IsSharedArrayBuffer() ||
args[0]->IsArrayBufferView())) {
return node::THROW_ERR_INVALID_ARG_TYPE(
env->isolate(),
"The \"list\" argument must be an instance of SharedArrayBuffer, "
"ArrayBuffer or ArrayBufferView.");
}
ArrayBufferViewContents<char> buffer(args[0]);
bool ignore_bom = args[1]->IsTrue();
bool has_fatal = args[2]->IsTrue();
const char* data = buffer.data();
size_t length = buffer.length();
if (has_fatal) {
auto result = simdutf::validate_utf8_with_errors(data, length);
if (result.error) {
return node::THROW_ERR_ENCODING_INVALID_ENCODED_DATA(
env->isolate(), "The encoded data was not valid for encoding utf-8");
}
}
if (!ignore_bom && length >= 3) {
if (memcmp(data, "\xEF\xBB\xBF", 3) == 0) {
data += 3;
length -= 3;
}
}
if (length == 0) return args.GetReturnValue().SetEmptyString();
Local<Value> ret;
if (StringBytes::Encode(env->isolate(), data, length, UTF8).ToLocal(&ret)) {
args.GetReturnValue().Set(ret);
}
}
void BindingData::ToASCII(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK_GE(args.Length(), 1);
CHECK(args[0]->IsString());
Utf8Value input(env->isolate(), args[0]);
auto out = ada::idna::to_ascii(input.ToStringView());
Local<Value> ret;
if (ToV8Value(env->context(), out, env->isolate()).ToLocal(&ret)) {
args.GetReturnValue().Set(ret);
}
}
void BindingData::ToUnicode(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK_GE(args.Length(), 1);
CHECK(args[0]->IsString());
Utf8Value input(env->isolate(), args[0]);
auto out = ada::idna::to_unicode(input.ToStringView());
Local<Value> ret;
if (ToV8Value(env->context(), out, env->isolate()).ToLocal(&ret)) {
args.GetReturnValue().Set(ret);
}
}
void BindingData::CreatePerIsolateProperties(IsolateData* isolate_data,
Local<ObjectTemplate> target) {
Isolate* isolate = isolate_data->isolate();
SetMethod(isolate, target, "encodeInto", EncodeInto);
SetMethodNoSideEffect(isolate, target, "encodeUtf8String", EncodeUtf8String);
SetMethodNoSideEffect(isolate, target, "decodeUTF8", DecodeUTF8);
SetMethodNoSideEffect(isolate, target, "toASCII", ToASCII);
SetMethodNoSideEffect(isolate, target, "toUnicode", ToUnicode);
SetMethodNoSideEffect(isolate, target, "decodeLatin1", DecodeLatin1);
}
void BindingData::CreatePerContextProperties(Local<Object> target,
Local<Value> unused,
Local<Context> context,
void* priv) {
Realm* realm = Realm::GetCurrent(context);
realm->AddBindingData<BindingData>(target);
}
void BindingData::RegisterTimerExternalReferences(
ExternalReferenceRegistry* registry) {
registry->Register(EncodeInto);
registry->Register(EncodeUtf8String);
registry->Register(DecodeUTF8);
registry->Register(ToASCII);
registry->Register(ToUnicode);
registry->Register(DecodeLatin1);
}
void BindingData::DecodeLatin1(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK_GE(args.Length(), 1);
if (!(args[0]->IsArrayBuffer() || args[0]->IsSharedArrayBuffer() ||
args[0]->IsArrayBufferView())) {
return node::THROW_ERR_INVALID_ARG_TYPE(
env->isolate(),
"The \"input\" argument must be an instance of ArrayBuffer, "
"SharedArrayBuffer, or ArrayBufferView.");
}
bool ignore_bom = args[1]->IsTrue();
bool has_fatal = args[2]->IsTrue();
ArrayBufferViewContents<uint8_t> buffer(args[0]);
const uint8_t* data = buffer.data();
size_t length = buffer.length();
if (ignore_bom && length > 0 && data[0] == 0xFF) {
data++;
length--;
}
if (length == 0) {
return args.GetReturnValue().SetEmptyString();
}
std::string result(length * 2, '\0');
size_t written = simdutf::convert_latin1_to_utf8(
reinterpret_cast<const char*>(data), length, result.data());
if (has_fatal && written == 0) {
return node::THROW_ERR_ENCODING_INVALID_ENCODED_DATA(
env->isolate(), "The encoded data was not valid for encoding latin1");
}
std::string_view view(result.c_str(), written);
Local<Value> ret;
if (ToV8Value(env->context(), view, env->isolate()).ToLocal(&ret)) {
args.GetReturnValue().Set(ret);
}
}
} // namespace encoding_binding
} // namespace node
NODE_BINDING_CONTEXT_AWARE_INTERNAL(
encoding_binding,
node::encoding_binding::BindingData::CreatePerContextProperties)
NODE_BINDING_PER_ISOLATE_INIT(
encoding_binding,
node::encoding_binding::BindingData::CreatePerIsolateProperties)
NODE_BINDING_EXTERNAL_REFERENCE(
encoding_binding,
node::encoding_binding::BindingData::RegisterTimerExternalReferences)