third_party/WebKit/Source/platform/exported/WebDataConsumerHandle.cpp

// Copyright 2015 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 "public/platform/WebDataConsumerHandle.h"

#include "platform/heap/Handle.h"
#include "wtf/PtrUtil.h"
#include <algorithm>
#include <memory>
#include <string.h>

namespace blink {

WebDataConsumerHandle::WebDataConsumerHandle() {
  ASSERT(ThreadState::current());
}

WebDataConsumerHandle::~WebDataConsumerHandle() {
  ASSERT(ThreadState::current());
}

WebDataConsumerHandle::Result WebDataConsumerHandle::Reader::read(
    void* data,
    size_t size,
    Flags flags,
    size_t* readSize) {
  *readSize = 0;
  const void* src = nullptr;
  size_t available;
  Result r = beginRead(&src, flags, &available);
  if (r != WebDataConsumerHandle::Ok)
    return r;
  *readSize = std::min(available, size);
  memcpy(data, src, *readSize);
  return endRead(*readSize);
}

}  // namespace blink