node/src/encoding_binding.cc at buffer-with-resizable-arraybuffer · jasnell/node · GitHub

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#include "encoding_binding.h"

#include "ada.h"

#include "env-inl.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::Context;

using v8::FunctionCallbackInfo;

using v8::Isolate;

using v8::Local;

using v8::MaybeLocal;

using v8::Object;

using v8::ObjectTemplate;

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,

v8::Local<v8::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,

v8::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);

v8::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();

int nchars;

int written = source->WriteUtf8(

isolate,

write_result,

dest_length,

&nchars,

String::NO_NULL_TERMINATION | String::REPLACE_INVALID_UTF8);

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->Utf8Length(isolate);

Local<ArrayBuffer> ab;

{

NoArrayBufferZeroFillScope no_zero_fill_scope(env->isolate_data());

std::unique_ptr<BackingStore> bs =

ArrayBuffer::NewBackingStore(isolate, length);

CHECK(bs);

str->WriteUtf8(isolate,

static_cast<char*>(bs->Data()),

-1, // We are certain that `data` is sufficiently large

nullptr,

String::NO_NULL_TERMINATION | String::REPLACE_INVALID_UTF8);

ab = ArrayBuffer::New(isolate, std::move(bs));

}

auto array = Uint8Array::New(ab, 0, length);

args.GetReturnValue().Set(array);

}

// 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> error;

MaybeLocal<Value> maybe_ret =

StringBytes::Encode(env->isolate(), data, length, UTF8, &error);

Local<Value> ret;

if (!maybe_ret.ToLocal(&ret)) {

CHECK(!error.IsEmpty());

env->isolate()->ThrowException(error);

return;

}

args.GetReturnValue().Set(ret);

}

void BindingData::ToASCII(const v8::FunctionCallbackInfo<v8::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());

args.GetReturnValue().Set(

String::NewFromUtf8(env->isolate(), out.c_str()).ToLocalChecked());

}

void BindingData::ToUnicode(const v8::FunctionCallbackInfo<v8::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());

args.GetReturnValue().Set(

String::NewFromUtf8(env->isolate(), out.c_str()).ToLocalChecked());

}

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);

}

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);

}

} // 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)

node/src/encoding_binding.cc at buffer-with-resizable-arraybuffer · jasnell/node · GitHub

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