Loading: move core/fetch to platform/loader/fetch

third_party/WebKit/Source/core/fetch/CachedMetadata.h

-/*
- * Copyright (C) 2010 Google Inc. All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions are
- * met:
- *
- *     * Redistributions of source code must retain the above copyright
- * notice, this list of conditions and the following disclaimer.
- *     * Redistributions in binary form must reproduce the above
- * copyright notice, this list of conditions and the following disclaimer
- * in the documentation and/or other materials provided with the
- * distribution.
- *     * Neither the name of Google Inc. nor the names of its
- * contributors may be used to endorse or promote products derived from
- * this software without specific prior written permission.
- *
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
- * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
- * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
- * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
- * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
- * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
- * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
- */
-
-#ifndef CachedMetadata_h
-#define CachedMetadata_h
-
-#include "core/CoreExport.h"
-#include "wtf/Assertions.h"
-#include "wtf/PassRefPtr.h"
-#include "wtf/RefCounted.h"
-#include "wtf/RefPtr.h"
-#include "wtf/Vector.h"
-#include <stdint.h>
-
-namespace blink {
-
-// Metadata retrieved from the embedding application's cache.
-//
-// Serialized data is NOT portable across architectures. However, reading the
-// data type ID will reject data generated with a different byte-order.
-class CORE_EXPORT CachedMetadata : public RefCounted<CachedMetadata> {
- public:
-  static PassRefPtr<CachedMetadata> create(uint32_t dataTypeID,
-                                           const char* data,
-                                           size_t size) {
-    return adoptRef(new CachedMetadata(dataTypeID, data, size));
-  }
-
-  static PassRefPtr<CachedMetadata> createFromSerializedData(const char* data,
-                                                             size_t size) {
-    return adoptRef(new CachedMetadata(data, size));
-  }
-
-  ~CachedMetadata() {}
-
-  const Vector<char>& serializedData() const { return m_serializedData; }
-
-  uint32_t dataTypeID() const {
-    // We need to define a local variable to use the constant in DCHECK.
-    constexpr auto kDataStart = CachedMetadata::kDataStart;
-    DCHECK_GE(m_serializedData.size(), kDataStart);
-    return *reinterpret_cast_ptr<uint32_t*>(
-        const_cast<char*>(m_serializedData.data()));
-  }
-
-  const char* data() const {
-    constexpr auto kDataStart = CachedMetadata::kDataStart;
-    DCHECK_GE(m_serializedData.size(), kDataStart);
-    return m_serializedData.data() + kDataStart;
-  }
-
-  size_t size() const {
-    constexpr auto kDataStart = CachedMetadata::kDataStart;
-    DCHECK_GE(m_serializedData.size(), kDataStart);
-    return m_serializedData.size() - kDataStart;
-  }
-
- private:
-  CachedMetadata(const char* data, size_t);
-  CachedMetadata(uint32_t dataTypeID, const char* data, size_t);
-
-  // Since the serialization format supports random access, storing it in
-  // serialized form avoids need for a copy during serialization.
-  Vector<char> m_serializedData;
-
-  // |m_serializedData| consists of 32 bits type ID and and actual data.
-  static constexpr size_t kDataStart = sizeof(uint32_t);
-};
-
-}  // namespace blink
-
-#endif