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// Copyright 2014 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "third_party/blink/renderer/platform/wtf/typed_arrays/array_piece.h"
#include "third_party/blink/renderer/platform/wtf/assertions.h"
#include "third_party/blink/renderer/platform/wtf/std_lib_extras.h"
#include "third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer.h"
#include "third_party/blink/renderer/platform/wtf/typed_arrays/array_buffer_view.h"
namespace WTF {
ArrayPiece::ArrayPiece() {
InitNull();
}
ArrayPiece::ArrayPiece(void* data, unsigned byte_length) {
InitWithData(data, byte_length);
}
ArrayPiece::ArrayPiece(ArrayBuffer* buffer) {
if (buffer) {
InitWithData(buffer->Data(), SafeCast<unsigned>(buffer->ByteLength()));
} else {
InitNull();
}
}
ArrayPiece::ArrayPiece(ArrayBufferView* buffer) {
if (buffer) {
InitWithData(buffer->BaseAddress(), buffer->ByteLength());
} else {
InitNull();
}
}
bool ArrayPiece::IsNull() const {
return is_null_;
}
void* ArrayPiece::Data() const {
DCHECK(!IsNull());
return data_;
}
unsigned char* ArrayPiece::Bytes() const {
return static_cast<unsigned char*>(Data());
}
unsigned ArrayPiece::ByteLength() const {
DCHECK(!IsNull());
return byte_length_;
}
void ArrayPiece::InitWithData(void* data, unsigned byte_length) {
byte_length_ = byte_length;
data_ = data;
is_null_ = false;
}
void ArrayPiece::InitNull() {
byte_length_ = 0;
data_ = nullptr;
is_null_ = true;
}
} // namespace WTF
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