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// Copyright 2021 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef INCLUDE_V8_TYPED_ARRAY_H_
#define INCLUDE_V8_TYPED_ARRAY_H_
#include <limits>
#include "v8-array-buffer.h" // NOLINT(build/include_directory)
#include "v8-local-handle.h" // NOLINT(build/include_directory)
#include "v8config.h" // NOLINT(build/include_directory)
namespace v8 {
/**
* A base class for an instance of TypedArray series of constructors
* (ES6 draft 15.13.6).
*/
class V8_EXPORT TypedArray : public ArrayBufferView {
public:
/*
* The largest supported typed array byte size. Each subclass defines a
* type-specific kMaxLength for the maximum length that can be passed to New.
*/
#if V8_ENABLE_SANDBOX
static constexpr size_t kMaxByteLength =
internal::kMaxSafeBufferSizeForSandbox;
#elif V8_HOST_ARCH_32_BIT
static constexpr size_t kMaxByteLength = std::numeric_limits<int>::max();
#else
// The maximum safe integer (2^53 - 1).
static constexpr size_t kMaxByteLength =
static_cast<size_t>((uint64_t{1} << 53) - 1);
#endif
/**
* Number of elements in this typed array
* (e.g. for Int16Array, |ByteLength|/2).
*/
size_t Length();
V8_INLINE static TypedArray* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<TypedArray*>(value);
}
private:
TypedArray();
static void CheckCast(Value* obj);
};
/**
* An instance of Uint8Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Uint8Array : public TypedArray {
public:
/*
* The largest Uint8Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint8_t);
static_assert(sizeof(uint8_t) == 1);
static Local<Uint8Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Uint8Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Uint8Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Uint8Array*>(value);
}
private:
Uint8Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Uint8ClampedArray constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Uint8ClampedArray : public TypedArray {
public:
/*
* The largest Uint8ClampedArray size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint8_t);
static_assert(sizeof(uint8_t) == 1);
static Local<Uint8ClampedArray> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Uint8ClampedArray> New(
Local<SharedArrayBuffer> shared_array_buffer, size_t byte_offset,
size_t length);
V8_INLINE static Uint8ClampedArray* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Uint8ClampedArray*>(value);
}
private:
Uint8ClampedArray();
static void CheckCast(Value* obj);
};
/**
* An instance of Int8Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Int8Array : public TypedArray {
public:
/*
* The largest Int8Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(int8_t);
static_assert(sizeof(int8_t) == 1);
static Local<Int8Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Int8Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Int8Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Int8Array*>(value);
}
private:
Int8Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Uint16Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Uint16Array : public TypedArray {
public:
/*
* The largest Uint16Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint16_t);
static_assert(sizeof(uint16_t) == 2);
static Local<Uint16Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Uint16Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Uint16Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Uint16Array*>(value);
}
private:
Uint16Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Int16Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Int16Array : public TypedArray {
public:
/*
* The largest Int16Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(int16_t);
static_assert(sizeof(int16_t) == 2);
static Local<Int16Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Int16Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Int16Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Int16Array*>(value);
}
private:
Int16Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Uint32Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Uint32Array : public TypedArray {
public:
/*
* The largest Uint32Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint32_t);
static_assert(sizeof(uint32_t) == 4);
static Local<Uint32Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Uint32Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Uint32Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Uint32Array*>(value);
}
private:
Uint32Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Int32Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Int32Array : public TypedArray {
public:
/*
* The largest Int32Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(int32_t);
static_assert(sizeof(int32_t) == 4);
static Local<Int32Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Int32Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Int32Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Int32Array*>(value);
}
private:
Int32Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Float16Array constructor.
*/
class V8_EXPORT Float16Array : public TypedArray {
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint16_t);
public:
static Local<Float16Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Float16Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Float16Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Float16Array*>(value);
}
private:
Float16Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Float32Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Float32Array : public TypedArray {
public:
/*
* The largest Float32Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(float);
static_assert(sizeof(float) == 4);
static Local<Float32Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Float32Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Float32Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Float32Array*>(value);
}
private:
Float32Array();
static void CheckCast(Value* obj);
};
/**
* An instance of Float64Array constructor (ES6 draft 15.13.6).
*/
class V8_EXPORT Float64Array : public TypedArray {
public:
/*
* The largest Float64Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(double);
static_assert(sizeof(double) == 8);
static Local<Float64Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<Float64Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static Float64Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<Float64Array*>(value);
}
private:
Float64Array();
static void CheckCast(Value* obj);
};
/**
* An instance of BigInt64Array constructor.
*/
class V8_EXPORT BigInt64Array : public TypedArray {
public:
/*
* The largest BigInt64Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(int64_t);
static_assert(sizeof(int64_t) == 8);
static Local<BigInt64Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<BigInt64Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static BigInt64Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<BigInt64Array*>(value);
}
private:
BigInt64Array();
static void CheckCast(Value* obj);
};
/**
* An instance of BigUint64Array constructor.
*/
class V8_EXPORT BigUint64Array : public TypedArray {
public:
/*
* The largest BigUint64Array size that can be constructed using New.
*/
static constexpr size_t kMaxLength =
TypedArray::kMaxByteLength / sizeof(uint64_t);
static_assert(sizeof(uint64_t) == 8);
static Local<BigUint64Array> New(Local<ArrayBuffer> array_buffer,
size_t byte_offset, size_t length);
static Local<BigUint64Array> New(Local<SharedArrayBuffer> shared_array_buffer,
size_t byte_offset, size_t length);
V8_INLINE static BigUint64Array* Cast(Value* value) {
#ifdef V8_ENABLE_CHECKS
CheckCast(value);
#endif
return static_cast<BigUint64Array*>(value);
}
private:
BigUint64Array();
static void CheckCast(Value* obj);
};
} // namespace v8
#endif // INCLUDE_V8_TYPED_ARRAY_H_