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JSBuffer.cpp
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JSBuffer.cpp
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#include "root.h"
#include "JSBuffer.h"
#include "ActiveDOMObject.h"
#include "ExtendedDOMClientIsoSubspaces.h"
#include "ExtendedDOMIsoSubspaces.h"
#include "IDLTypes.h"
// #include "JSBlob.h"
#include "JSDOMAttribute.h"
#include "JSDOMBinding.h"
#include "JSDOMConstructor.h"
#include "JSDOMConvertBase.h"
#include "JSDOMConvertInterface.h"
#include "JSDOMConvertStrings.h"
#include "JSDOMExceptionHandling.h"
#include "JSDOMGlobalObject.h"
#include "JSDOMGlobalObjectInlines.h"
#include "JSDOMOperation.h"
#include "JSDOMWrapperCache.h"
#include "ScriptExecutionContext.h"
#include "WebCoreJSClientData.h"
#include <JavaScriptCore/FunctionPrototype.h>
#include <JavaScriptCore/HeapAnalyzer.h>
#include <JavaScriptCore/JSFunction.h>
#include <JavaScriptCore/InternalFunction.h>
#include <JavaScriptCore/LazyClassStructure.h>
#include <JavaScriptCore/LazyClassStructureInlines.h>
#include <JavaScriptCore/FunctionPrototype.h>
#include <JavaScriptCore/JSDestructibleObjectHeapCellType.h>
#include <JavaScriptCore/SlotVisitorMacros.h>
#include <JavaScriptCore/SubspaceInlines.h>
#include <wtf/GetPtr.h>
#include <wtf/PointerPreparations.h>
#include <wtf/URL.h>
#include <wtf/text/WTFString.h>
#include <JavaScriptCore/BuiltinNames.h>
#include "JSBufferEncodingType.h"
#include <JavaScriptCore/JSBase.h>
#if ENABLE(MEDIA_SOURCE)
#include "BufferMediaSource.h"
#include "JSMediaSource.h"
#endif
#ifdef WIN32
#include "musl-memmem.h"
#endif
#include <JavaScriptCore/DOMJITAbstractHeap.h>
#include "DOMJITIDLConvert.h"
#include "DOMJITIDLType.h"
#include "DOMJITIDLTypeFilter.h"
#include "DOMJITHelpers.h"
#include <JavaScriptCore/DFGAbstractHeap.h>
// #include <JavaScriptCore/JSTypedArrayViewPrototype.h>
#include <JavaScriptCore/JSArrayBufferViewInlines.h>
using namespace JSC;
using namespace WebCore;
JSC_DECLARE_HOST_FUNCTION(constructJSBuffer);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_alloc);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_allocUnsafe);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_allocUnsafeSlow);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_byteLength);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_compare);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_concat);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_from);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_isBuffer);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_isEncoding);
static JSC_DECLARE_HOST_FUNCTION(jsBufferConstructorFunction_toBuffer);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_compare);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_copy);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_equals);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_fill);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_includes);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_indexOf);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_lastIndexOf);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_swap16);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_swap32);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_swap64);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_toString);
static JSC_DECLARE_HOST_FUNCTION(jsBufferPrototypeFunction_write);
static JSUint8Array* allocBuffer(JSC::JSGlobalObject* lexicalGlobalObject, size_t byteLength)
{
JSC::VM& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
auto* uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, byteLength);
if (UNLIKELY(!uint8Array)) {
throwOutOfMemoryError(lexicalGlobalObject, throwScope);
return nullptr;
}
return uint8Array;
}
static JSUint8Array* allocBufferUnsafe(JSC::JSGlobalObject* lexicalGlobalObject, size_t byteLength)
{
JSC::VM& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
auto* uint8Array = JSC::JSUint8Array::createUninitialized(lexicalGlobalObject, subclassStructure, byteLength);
if (UNLIKELY(!uint8Array)) {
throwOutOfMemoryError(lexicalGlobalObject, throwScope);
return nullptr;
}
return uint8Array;
}
// Normalize val to be an integer in the range of [1, -1] since
// implementations of memcmp() can vary by platform.
static int normalizeCompareVal(int val, size_t a_length, size_t b_length)
{
if (val == 0) {
if (a_length > b_length)
return 1;
else if (a_length < b_length)
return -1;
} else {
if (val > 0)
return 1;
else
return -1;
}
return val;
}
static inline uint32_t parseIndex(JSC::JSGlobalObject* lexicalGlobalObject, JSC::ThrowScope& scope, JSValue arg)
{
if (auto num = arg.tryGetAsUint32Index())
return num.value();
if (arg.isNumber())
throwRangeError(lexicalGlobalObject, scope, "Invalid array length"_s);
else
throwTypeError(lexicalGlobalObject, scope, "Expected number"_s);
return 0;
}
static inline WebCore::BufferEncodingType parseEncoding(JSC::JSGlobalObject* lexicalGlobalObject, JSC::ThrowScope& scope, JSValue arg)
{
if (UNLIKELY(!arg.isString())) {
throwTypeError(lexicalGlobalObject, scope, "Expected string"_s);
return WebCore::BufferEncodingType::utf8;
}
std::optional<BufferEncodingType> encoded = parseEnumeration<BufferEncodingType>(*lexicalGlobalObject, arg);
if (UNLIKELY(!encoded)) {
throwTypeError(lexicalGlobalObject, scope, "Invalid encoding"_s);
return WebCore::BufferEncodingType::utf8;
}
return encoded.value();
}
namespace WebCore {
using namespace JSC;
template<> class IDLOperation<JSArrayBufferView> {
public:
using ClassParameter = JSC::JSUint8Array*;
using Operation = JSC::EncodedJSValue(JSC::JSGlobalObject*, JSC::CallFrame*, ClassParameter);
template<Operation operation, CastedThisErrorBehavior = CastedThisErrorBehavior::Throw>
static JSC::EncodedJSValue call(JSC::JSGlobalObject& lexicalGlobalObject, JSC::CallFrame& callFrame, const char* operationName)
{
auto& vm = JSC::getVM(&lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
auto thisValue = callFrame.thisValue().toThis(&lexicalGlobalObject, JSC::ECMAMode::strict());
if (thisValue.isUndefinedOrNull()) {
throwTypeError(&lexicalGlobalObject, throwScope, "Cannot convert undefined or null to object"_s);
return JSC::JSValue::encode(JSC::jsUndefined());
}
auto thisObject = JSC::jsDynamicCast<JSC::JSUint8Array*>(thisValue);
if (UNLIKELY(!thisObject))
return throwThisTypeError(lexicalGlobalObject, throwScope, "Buffer", operationName);
RELEASE_AND_RETURN(throwScope, (operation(&lexicalGlobalObject, &callFrame, thisObject)));
}
};
}
JSC::EncodedJSValue JSBuffer__bufferFromPointerAndLengthAndDeinit(JSC::JSGlobalObject* lexicalGlobalObject, char* ptr, size_t length, void* ctx, JSTypedArrayBytesDeallocator bytesDeallocator)
{
JSC::JSUint8Array* uint8Array = nullptr;
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
if (LIKELY(length > 0)) {
auto buffer = ArrayBuffer::createFromBytes(ptr, length, createSharedTask<void(void*)>([ctx, bytesDeallocator](void* p) {
if (bytesDeallocator)
bytesDeallocator(p, ctx);
}));
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, WTFMove(buffer), 0, length);
} else {
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, 0);
}
return JSC::JSValue::encode(uint8Array);
}
namespace WebCore {
using namespace JSC;
static inline JSC::EncodedJSValue writeToBuffer(JSC::JSGlobalObject* lexicalGlobalObject, JSArrayBufferView* castedThis, JSString* str, uint32_t offset, uint32_t length, BufferEncodingType encoding)
{
if (UNLIKELY(str->length() == 0))
return JSC::JSValue::encode(JSC::jsNumber(0));
auto view = str->tryGetValue(lexicalGlobalObject);
size_t written = 0;
switch (encoding) {
case WebCore::BufferEncodingType::utf8:
case WebCore::BufferEncodingType::latin1:
case WebCore::BufferEncodingType::ascii:
case WebCore::BufferEncodingType::ucs2:
case WebCore::BufferEncodingType::utf16le:
case WebCore::BufferEncodingType::base64:
case WebCore::BufferEncodingType::base64url:
case WebCore::BufferEncodingType::hex: {
if (view.is8Bit()) {
written = Bun__encoding__writeLatin1(view.characters8(), view.length(), reinterpret_cast<unsigned char*>(castedThis->vector()) + offset, length, static_cast<uint8_t>(encoding));
} else {
written = Bun__encoding__writeUTF16(view.characters16(), view.length(), reinterpret_cast<unsigned char*>(castedThis->vector()) + offset, length, static_cast<uint8_t>(encoding));
}
break;
}
default: {
break;
}
}
return JSC::JSValue::encode(JSC::jsNumber(written));
}
static inline JSC::JSUint8Array* JSBuffer__bufferFromLengthAsArray(JSC::JSGlobalObject* lexicalGlobalObject, int64_t length)
{
auto throwScope = DECLARE_THROW_SCOPE(lexicalGlobalObject->vm());
if (UNLIKELY(length < 0)) {
throwRangeError(lexicalGlobalObject, throwScope, "Invalid array length"_s);
return nullptr;
}
JSC::JSUint8Array* uint8Array = nullptr;
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
if (LIKELY(length > 0)) {
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, length);
} else {
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, 0);
}
RELEASE_AND_RETURN(throwScope, uint8Array);
}
extern "C" JSC::EncodedJSValue JSBuffer__bufferFromLength(JSC::JSGlobalObject* lexicalGlobalObject, int64_t length)
{
return JSC::JSValue::encode(JSBuffer__bufferFromLengthAsArray(lexicalGlobalObject, length));
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_allocUnsafeBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
VM& vm = lexicalGlobalObject->vm();
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 1)
return throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
auto length = callFrame->uncheckedArgument(0).toInt32(lexicalGlobalObject);
RELEASE_AND_RETURN(throwScope, JSValue::encode(allocBufferUnsafe(lexicalGlobalObject, length)));
}
EncodedJSValue JSBuffer__bufferFromPointerAndLength(JSC::JSGlobalObject* lexicalGlobalObject, const unsigned char* ptr, size_t length)
{
JSC::JSUint8Array* uint8Array;
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
if (LIKELY(length > 0)) {
auto buffer = ArrayBuffer::create(ptr, length);
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, WTFMove(buffer), 0, length);
} else {
uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, 0);
}
return JSC::JSValue::encode(uint8Array);
}
// new Buffer()
static inline JSC::EncodedJSValue constructBufferEmpty(JSGlobalObject* lexicalGlobalObject)
{
return JSBuffer__bufferFromLength(lexicalGlobalObject, 0);
}
// new Buffer(size)
static inline JSC::EncodedJSValue constructBufferFromLength(JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame)
{
return jsBufferConstructorFunction_allocUnsafeBody(lexicalGlobalObject, callFrame);
}
static JSC::EncodedJSValue constructFromEncoding(JSGlobalObject* lexicalGlobalObject, JSString* str, WebCore::BufferEncodingType encoding)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto scope = DECLARE_THROW_SCOPE(vm);
auto view = str->tryGetValue(lexicalGlobalObject);
JSC::EncodedJSValue result;
if (view.is8Bit()) {
switch (encoding) {
case WebCore::BufferEncodingType::utf8:
case WebCore::BufferEncodingType::ucs2:
case WebCore::BufferEncodingType::utf16le:
case WebCore::BufferEncodingType::base64:
case WebCore::BufferEncodingType::base64url:
case WebCore::BufferEncodingType::hex: {
result = Bun__encoding__constructFromLatin1(lexicalGlobalObject, view.characters8(), view.length(), static_cast<uint8_t>(encoding));
break;
}
case WebCore::BufferEncodingType::ascii: // ascii is a noop for latin1
case WebCore::BufferEncodingType::latin1: { // The native encoding is latin1, so we don't need to do any conversion.
result = JSBuffer__bufferFromPointerAndLength(lexicalGlobalObject, view.characters8(), view.length());
break;
}
default: {
break;
}
}
} else {
switch (encoding) {
case WebCore::BufferEncodingType::utf8:
case WebCore::BufferEncodingType::base64:
case WebCore::BufferEncodingType::base64url:
case WebCore::BufferEncodingType::hex:
case WebCore::BufferEncodingType::ascii:
case WebCore::BufferEncodingType::latin1: {
result = Bun__encoding__constructFromUTF16(lexicalGlobalObject, view.characters16(), view.length(), static_cast<uint8_t>(encoding));
break;
}
case WebCore::BufferEncodingType::ucs2:
case WebCore::BufferEncodingType::utf16le: {
// The native encoding is UTF-16
// so we don't need to do any conversion.
result = JSBuffer__bufferFromPointerAndLength(lexicalGlobalObject, reinterpret_cast<const unsigned char*>(view.characters16()), view.length() * 2);
break;
}
default: {
break;
}
}
}
JSC::JSValue decoded = JSC::JSValue::decode(result);
if (UNLIKELY(!result)) {
throwTypeError(lexicalGlobalObject, scope, "An error occurred while decoding the string"_s);
return JSC::JSValue::encode(jsUndefined());
}
if (decoded.isCell() && decoded.getObject()->isErrorInstance()) {
scope.throwException(lexicalGlobalObject, decoded);
return JSC::JSValue::encode(jsUndefined());
}
return result;
}
static inline JSC::EncodedJSValue constructBufferFromStringAndEncoding(JSC::JSGlobalObject* lexicalGlobalObject, JSValue arg0, JSValue arg1)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
uint32_t offset = 0;
WebCore::BufferEncodingType encoding = WebCore::BufferEncodingType::utf8;
auto scope = DECLARE_THROW_SCOPE(vm);
auto* str = arg0.toString(lexicalGlobalObject);
RETURN_IF_EXCEPTION(scope, JSC::JSValue::encode(jsUndefined()));
if (arg1 && arg1.isString()) {
std::optional<BufferEncodingType> encoded = parseEnumeration<BufferEncodingType>(*lexicalGlobalObject, arg1);
if (!encoded) {
throwTypeError(lexicalGlobalObject, scope, "Invalid encoding"_s);
return JSC::JSValue::encode(jsUndefined());
}
encoding = encoded.value();
}
if (str->length() == 0)
return constructBufferEmpty(lexicalGlobalObject);
JSC::EncodedJSValue result = constructFromEncoding(lexicalGlobalObject, str, encoding);
RELEASE_AND_RETURN(scope, result);
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_allocBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
VM& vm = lexicalGlobalObject->vm();
auto scope = DECLARE_THROW_SCOPE(vm);
auto lengthArg = callFrame->uncheckedArgument(0);
if (UNLIKELY(!lengthArg.isNumber())) {
throwTypeError(lexicalGlobalObject, scope, "Expected number"_s);
return JSValue::encode(jsUndefined());
}
auto length = lengthArg.toInt32(lexicalGlobalObject);
if (length < 0) {
throwRangeError(lexicalGlobalObject, scope, "Invalid array length"_s);
return JSValue::encode(jsUndefined());
}
auto* globalObject = reinterpret_cast<Zig::GlobalObject*>(lexicalGlobalObject);
auto* subclassStructure = globalObject->JSBufferSubclassStructure();
// fill argument
if (UNLIKELY(callFrame->argumentCount() > 1)) {
auto* uint8Array = JSC::JSUint8Array::createUninitialized(lexicalGlobalObject, subclassStructure, length);
auto value = callFrame->argument(1);
if (value.isString()) {
size_t length = uint8Array->byteLength();
size_t start = 0;
size_t end = length;
WebCore::BufferEncodingType encoding = WebCore::BufferEncodingType::utf8;
if (callFrame->argumentCount() > 2) {
EnsureStillAliveScope arg2 = callFrame->uncheckedArgument(2);
if (!arg2.value().isUndefined()) {
encoding = parseEncoding(lexicalGlobalObject, scope, arg2.value());
RETURN_IF_EXCEPTION(scope, JSC::JSValue::encode(jsUndefined()));
}
}
auto startPtr = uint8Array->typedVector() + start;
auto str_ = value.toWTFString(lexicalGlobalObject);
ZigString str = Zig::toZigString(str_);
if (UNLIKELY(!Bun__Buffer_fill(&str, startPtr, end - start, encoding))) {
throwTypeError(lexicalGlobalObject, scope, "Failed to decode value"_s);
return JSC::JSValue::encode(jsUndefined());
}
} else if (auto* view = JSC::jsDynamicCast<JSC::JSArrayBufferView*>(value)) {
if (UNLIKELY(view->isDetached())) {
throwVMTypeError(lexicalGlobalObject, scope, "Uint8Array is detached"_s);
return JSValue::encode(jsUndefined());
}
size_t length = view->byteLength();
if (UNLIKELY(length == 0)) {
throwTypeError(lexicalGlobalObject, scope, "Buffer cannot be empty"_s);
return JSC::JSValue::encode(jsUndefined());
}
auto* start = uint8Array->typedVector();
auto* head = start;
size_t remain = uint8Array->byteLength();
memmove(head, view->vector(), length);
remain -= length;
head += length;
while (remain >= length) {
memcpy(head, start, length);
remain -= length;
head += length;
length <<= 1;
}
if (remain > 0) {
memcpy(head, start, remain);
}
} else {
auto value_ = value.toInt32(lexicalGlobalObject) & 0xFF;
auto value_uint8 = static_cast<uint8_t>(value_);
RETURN_IF_EXCEPTION(scope, JSC::JSValue::encode(jsUndefined()));
auto length = uint8Array->byteLength();
auto start = 0;
auto end = length;
auto startPtr = uint8Array->typedVector() + start;
auto endPtr = uint8Array->typedVector() + end;
memset(startPtr, value_uint8, endPtr - startPtr);
}
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(uint8Array));
} else {
auto* uint8Array = JSC::JSUint8Array::create(lexicalGlobalObject, subclassStructure, length);
if (UNLIKELY(!uint8Array)) {
throwOutOfMemoryError(lexicalGlobalObject, scope);
return JSC::JSValue::encode(jsUndefined());
}
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(uint8Array));
}
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_allocUnsafeSlowBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
return jsBufferConstructorFunction_allocUnsafeBody(lexicalGlobalObject, callFrame);
}
// new SlowBuffer(size)
EncodedJSValue constructSlowBuffer(JSGlobalObject* lexicalGlobalObject, CallFrame* callFrame)
{
return jsBufferConstructorFunction_allocUnsafeSlowBody(lexicalGlobalObject, callFrame);
}
static inline JSC::EncodedJSValue jsBufferByteLengthFromStringAndEncoding(JSC::JSGlobalObject* lexicalGlobalObject, JSString* str, WebCore::BufferEncodingType encoding)
{
auto scope = DECLARE_THROW_SCOPE(lexicalGlobalObject->vm());
if (!str) {
throwTypeError(lexicalGlobalObject, scope, "byteLength() expects a string"_s);
return JSC::JSValue::encode(jsUndefined());
}
if (str->length() == 0)
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(JSC::jsNumber(0)));
int64_t written = 0;
switch (encoding) {
case WebCore::BufferEncodingType::ucs2:
case WebCore::BufferEncodingType::utf16le: {
// https://github.com/nodejs/node/blob/e676942f814915b2d24fc899bb42dc71ae6c8226/lib/buffer.js#L600
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(JSC::jsNumber(str->length() * 2)));
}
case WebCore::BufferEncodingType::latin1:
case WebCore::BufferEncodingType::ascii: {
// https://github.com/nodejs/node/blob/e676942f814915b2d24fc899bb42dc71ae6c8226/lib/buffer.js#L627
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(JSC::jsNumber(str->length())));
}
case WebCore::BufferEncodingType::base64:
case WebCore::BufferEncodingType::base64url: {
int64_t length = str->length();
auto view = str->tryGetValue(lexicalGlobalObject);
if (view.is8Bit()) {
if (view.characters8()[length - 1] == 0x3D) {
length--;
if (length > 1 && view.characters8()[length - 1] == '=')
length--;
}
} else {
if (view.characters16()[length - 1] == 0x3D) {
length--;
if (length > 1 && view.characters16()[length - 1] == '=')
length--;
}
}
// https://github.com/nodejs/node/blob/e676942f814915b2d24fc899bb42dc71ae6c8226/lib/buffer.js#L579
return JSValue::encode(jsNumber(static_cast<double>((length * 3) >> 2)));
}
case WebCore::BufferEncodingType::hex: {
return JSValue::encode(jsNumber(str->length() >> 1));
}
case WebCore::BufferEncodingType::utf8: {
auto view = str->tryGetValue(lexicalGlobalObject);
if (view.is8Bit()) {
written = Bun__encoding__byteLengthLatin1(view.characters8(), view.length(), static_cast<uint8_t>(encoding));
} else {
written = Bun__encoding__byteLengthUTF16(view.characters16(), view.length(), static_cast<uint8_t>(encoding));
}
break;
}
default: {
break;
}
}
RELEASE_AND_RETURN(scope, JSC::JSValue::encode(JSC::jsNumber(written)));
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_byteLengthBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
uint32_t offset = 0;
WebCore::BufferEncodingType encoding = WebCore::BufferEncodingType::utf8;
auto scope = DECLARE_THROW_SCOPE(vm);
if (UNLIKELY(callFrame->argumentCount() == 0)) {
throwTypeError(lexicalGlobalObject, scope, "Not enough arguments"_s);
return JSC::JSValue::encode(jsUndefined());
}
EnsureStillAliveScope arg0 = callFrame->argument(0);
EnsureStillAliveScope arg1 = callFrame->argument(1);
if (callFrame->argumentCount() > 1) {
if (arg1.value().isString()) {
std::optional<BufferEncodingType> encoded = parseEnumeration<BufferEncodingType>(*lexicalGlobalObject, arg1.value());
// this one doesn't fail
if (encoded) {
encoding = encoded.value();
}
}
}
if (LIKELY(arg0.value().isString()))
return jsBufferByteLengthFromStringAndEncoding(lexicalGlobalObject, asString(arg0.value()), encoding);
if (auto* arrayBufferView = jsDynamicCast<JSC::JSArrayBufferView*>(arg0.value())) {
return JSValue::encode(jsNumber(arrayBufferView->byteLength()));
}
if (auto* arrayBuffer = jsDynamicCast<JSC::JSArrayBuffer*>(arg0.value())) {
return JSValue::encode(jsNumber(arrayBuffer->impl()->byteLength()));
}
throwTypeError(lexicalGlobalObject, scope, "Invalid input, must be a string, Buffer, or ArrayBuffer"_s);
return JSC::JSValue::encode(jsUndefined());
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_compareBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 2) {
throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
return JSValue::encode(jsUndefined());
}
auto castedThisValue = callFrame->uncheckedArgument(0);
JSC::JSArrayBufferView* castedThis = JSC::jsDynamicCast<JSC::JSArrayBufferView*>(castedThisValue);
if (UNLIKELY(!castedThis)) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Buffer (first argument)"_s);
return JSValue::encode(jsUndefined());
}
if (UNLIKELY(castedThis->isDetached())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Uint8Array (first argument) is detached"_s);
return JSValue::encode(jsUndefined());
}
auto buffer = callFrame->uncheckedArgument(1);
JSC::JSArrayBufferView* view = JSC::jsDynamicCast<JSC::JSArrayBufferView*>(buffer);
if (UNLIKELY(!view)) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Buffer (2nd argument)"_s);
return JSValue::encode(jsUndefined());
}
if (UNLIKELY(view->isDetached())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Uint8Array (second argument) is detached"_s);
return JSValue::encode(jsUndefined());
}
size_t targetStart = 0;
size_t targetEndInit = view->byteLength();
size_t targetEnd = targetEndInit;
size_t sourceStart = 0;
size_t sourceEndInit = castedThis->byteLength();
size_t sourceEnd = sourceEndInit;
switch (callFrame->argumentCount()) {
default:
sourceEnd = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(5));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
FALLTHROUGH;
case 5:
sourceStart = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(4));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
FALLTHROUGH;
case 4:
targetEnd = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(3));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
FALLTHROUGH;
case 3:
targetStart = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(2));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
break;
case 2:
case 1:
case 0:
break;
}
targetStart = std::min(targetStart, std::min(targetEnd, targetEndInit));
sourceStart = std::min(sourceStart, std::min(sourceEnd, sourceEndInit));
auto sourceLength = sourceEnd - sourceStart;
auto targetLength = targetEnd - targetStart;
auto actualLength = std::min(sourceLength, targetLength);
auto sourceStartPtr = reinterpret_cast<unsigned char*>(castedThis->vector()) + sourceStart;
auto targetStartPtr = reinterpret_cast<unsigned char*>(view->vector()) + targetStart;
auto result = actualLength > 0 ? memcmp(sourceStartPtr, targetStartPtr, actualLength) : 0;
RELEASE_AND_RETURN(throwScope, JSC::JSValue::encode(JSC::jsNumber(normalizeCompareVal(result, sourceLength, targetLength))));
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_concatBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 1) {
return constructBufferEmpty(lexicalGlobalObject);
}
auto arrayValue = callFrame->uncheckedArgument(0);
auto array = JSC::jsDynamicCast<JSC::JSArray*>(arrayValue);
if (!array) {
throwTypeError(lexicalGlobalObject, throwScope, "Argument must be an array"_s);
return JSValue::encode(jsUndefined());
}
size_t arrayLength = array->length();
if (arrayLength < 1) {
RELEASE_AND_RETURN(throwScope, constructBufferEmpty(lexicalGlobalObject));
}
size_t byteLength = 0;
for (size_t i = 0; i < arrayLength; i++) {
auto element = array->getIndex(lexicalGlobalObject, i);
RETURN_IF_EXCEPTION(throwScope, {});
auto* typedArray = JSC::jsDynamicCast<JSC::JSUint8Array*>(element);
if (!typedArray) {
throwTypeError(lexicalGlobalObject, throwScope, "Buffer.concat expects Uint8Array"_s);
return JSValue::encode(jsUndefined());
}
byteLength += typedArray->length();
}
JSValue totalLengthValue = callFrame->argument(1);
if (!totalLengthValue.isUndefined()) {
if (UNLIKELY(!totalLengthValue.isNumber())) {
throwTypeError(lexicalGlobalObject, throwScope, "totalLength must be a valid number"_s);
return JSValue::encode(jsUndefined());
}
auto totalLength = totalLengthValue.toTypedArrayIndex(lexicalGlobalObject, "totalLength must be a valid number"_s);
RETURN_IF_EXCEPTION(throwScope, {});
byteLength = totalLength;
}
if (byteLength == 0) {
RELEASE_AND_RETURN(throwScope, constructBufferEmpty(lexicalGlobalObject));
}
JSC::JSUint8Array* outBuffer = JSBuffer__bufferFromLengthAsArray(lexicalGlobalObject, byteLength);
size_t remain = byteLength;
auto* head = outBuffer->typedVector();
for (size_t i = 0; i < arrayLength && remain > 0; i++) {
auto element = array->getIndex(lexicalGlobalObject, i);
RETURN_IF_EXCEPTION(throwScope, {});
auto* typedArray = JSC::jsCast<JSC::JSUint8Array*>(element);
size_t length = std::min(remain, typedArray->length());
memcpy(head, typedArray->typedVector(), length);
remain -= length;
head += length;
}
RELEASE_AND_RETURN(throwScope, JSC::JSValue::encode(JSC::JSValue(outBuffer)));
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_isEncodingBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto* encoding_ = callFrame->argument(0).toStringOrNull(lexicalGlobalObject);
if (!encoding_)
return JSValue::encode(jsBoolean(false));
std::optional<BufferEncodingType> encoded = parseEnumeration<BufferEncodingType>(*lexicalGlobalObject, encoding_);
return JSValue::encode(jsBoolean(!!encoded));
}
static inline JSC::EncodedJSValue jsBufferConstructorFunction_toBufferBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (UNLIKELY(callFrame->argumentCount() < 1)) {
throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
return JSValue::encode(jsUndefined());
}
auto buffer = callFrame->uncheckedArgument(0);
if (!buffer.isCell() || !JSC::isTypedView(buffer.asCell()->type())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Uint8Array"_s);
return JSValue::encode(jsUndefined());
}
JSC::JSUint8Array* view = JSC::jsDynamicCast<JSC::JSUint8Array*>(buffer);
if (!view) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Uint8Array"_s);
return JSValue::encode(jsUndefined());
}
toBuffer(lexicalGlobalObject, view);
RELEASE_AND_RETURN(throwScope, JSC::JSValue::encode(view));
}
class JSBufferPrototype : public JSC::JSNonFinalObject {
public:
using Base = JSC::JSNonFinalObject;
static JSBufferPrototype* create(JSC::VM& vm, JSGlobalObject* globalObject, JSC::Structure* structure)
{
JSBufferPrototype* ptr = new (NotNull, JSC::allocateCell<JSBufferPrototype>(vm)) JSBufferPrototype(vm, globalObject, structure);
ptr->finishCreation(vm, globalObject);
return ptr;
}
DECLARE_INFO;
template<typename CellType, JSC::SubspaceAccess>
static JSC::GCClient::IsoSubspace* subspaceFor(JSC::VM& vm)
{
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(JSBufferPrototype, Base);
return &vm.plainObjectSpace();
}
static JSC::Structure* createStructure(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::JSValue prototype)
{
return JSC::Structure::create(vm, globalObject, prototype, JSC::TypeInfo(JSC::ObjectType, StructureFlags), info());
}
private:
JSBufferPrototype(JSC::VM& vm, JSC::JSGlobalObject* globalObject, JSC::Structure* structure)
: Base(vm, structure)
{
}
void finishCreation(JSC::VM&, JSC::JSGlobalObject*);
};
STATIC_ASSERT_ISO_SUBSPACE_SHARABLE(JSBufferPrototype, JSBufferPrototype::Base);
static inline JSC::EncodedJSValue jsBufferPrototypeFunction_compareBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame, typename IDLOperation<JSArrayBufferView>::ClassParameter castedThis)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 1) {
throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
return JSValue::encode(jsUndefined());
}
JSC::JSUint8Array* view = JSC::jsDynamicCast<JSC::JSUint8Array*>(callFrame->uncheckedArgument(0));
if (UNLIKELY(!view)) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Uint8Array"_s);
return JSValue::encode(jsUndefined());
}
if (UNLIKELY(view->isDetached())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Uint8Array is detached"_s);
return JSValue::encode(jsUndefined());
}
size_t targetStart = 0;
size_t targetEndInit = view->byteLength();
size_t targetEnd = targetEndInit;
size_t sourceStart = 0;
size_t sourceEndInit = castedThis->byteLength();
size_t sourceEnd = sourceEndInit;
JSValue targetStartValue = jsUndefined();
JSValue targetEndValue = jsUndefined();
JSValue sourceStartValue = jsUndefined();
JSValue sourceEndValue = jsUndefined();
switch (callFrame->argumentCount()) {
default:
sourceEndValue = callFrame->uncheckedArgument(4);
FALLTHROUGH;
case 4:
sourceStartValue = callFrame->uncheckedArgument(3);
FALLTHROUGH;
case 3:
targetEndValue = callFrame->uncheckedArgument(2);
FALLTHROUGH;
case 2:
targetStartValue = callFrame->uncheckedArgument(1);
break;
case 1:
case 0:
break;
}
if (!targetStartValue.isUndefined()) {
targetStart = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(1));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
}
if (!targetEndValue.isUndefined()) {
targetEnd = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(2));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
}
if (!sourceStartValue.isUndefined()) {
sourceStart = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(3));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
}
if (!sourceEndValue.isUndefined()) {
sourceEnd = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(4));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
}
targetStart = std::min(targetStart, std::min(targetEnd, targetEndInit));
sourceStart = std::min(sourceStart, std::min(sourceEnd, sourceEndInit));
auto sourceLength = sourceEnd - sourceStart;
auto targetLength = targetEnd - targetStart;
auto actualLength = std::min(sourceLength, targetLength);
auto sourceStartPtr = castedThis->typedVector() + sourceStart;
auto targetStartPtr = view->typedVector() + targetStart;
auto result = actualLength > 0 ? memcmp(sourceStartPtr, targetStartPtr, actualLength) : 0;
RELEASE_AND_RETURN(throwScope, JSC::JSValue::encode(JSC::jsNumber(normalizeCompareVal(result, sourceLength, targetLength))));
}
static inline JSC::EncodedJSValue jsBufferPrototypeFunction_copyBody(JSC::JSGlobalObject* lexicalGlobalObject, JSC::CallFrame* callFrame, typename IDLOperation<JSArrayBufferView>::ClassParameter castedThis)
{
auto& vm = JSC::getVM(lexicalGlobalObject);
auto throwScope = DECLARE_THROW_SCOPE(vm);
if (callFrame->argumentCount() < 1) {
throwVMError(lexicalGlobalObject, throwScope, createNotEnoughArgumentsError(lexicalGlobalObject));
return JSValue::encode(jsUndefined());
}
auto buffer = callFrame->uncheckedArgument(0);
if (!buffer.isCell() || !JSC::isTypedView(buffer.asCell()->type())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Expected Uint8Array"_s);
return JSValue::encode(jsUndefined());
}
JSC::JSArrayBufferView* view = JSC::jsDynamicCast<JSC::JSArrayBufferView*>(buffer);
if (UNLIKELY(!view || view->isDetached())) {
throwVMTypeError(lexicalGlobalObject, throwScope, "Uint8Array is detached"_s);
return JSValue::encode(jsUndefined());
}
size_t targetStart = 0;
size_t targetEnd = view->byteLength();
size_t sourceStart = 0;
size_t sourceEndInit = castedThis->byteLength();
size_t sourceEnd = sourceEndInit;
JSValue targetStartValue = jsUndefined();
JSValue sourceStartValue = jsUndefined();
JSValue sourceEndValue = jsUndefined();
switch (callFrame->argumentCount()) {
default:
sourceEndValue = callFrame->uncheckedArgument(3);
FALLTHROUGH;
case 3:
sourceStartValue = callFrame->uncheckedArgument(2);
FALLTHROUGH;
case 2:
targetStartValue = callFrame->uncheckedArgument(1);
break;
case 1:
case 0:
break;
}
if (!targetStartValue.isUndefined()) {
targetStart = parseIndex(lexicalGlobalObject, throwScope, callFrame->uncheckedArgument(1));
RETURN_IF_EXCEPTION(throwScope, JSValue::encode(jsUndefined()));
}