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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 "mojo/common/data_pipe_utils.h"
#include <stdio.h>
#include "base/file_util.h"
#include "base/files/file_path.h"
#include "base/files/scoped_file.h"
#include "base/message_loop/message_loop.h"
#include "base/task_runner_util.h"
namespace mojo {
namespace common {
bool BlockingCopyToFile(ScopedDataPipeConsumerHandle source,
const base::FilePath& destination) {
base::ScopedFILE fp(base::OpenFile(destination, "wb"));
if (!fp)
return false;
for (;;) {
const void* buffer;
uint32_t num_bytes;
MojoResult result = BeginReadDataRaw(source.get(), &buffer, &num_bytes,
MOJO_READ_DATA_FLAG_NONE);
if (result == MOJO_RESULT_OK) {
size_t bytes_written = fwrite(buffer, 1, num_bytes, fp.get());
result = EndReadDataRaw(source.get(), num_bytes);
if (bytes_written < num_bytes || result != MOJO_RESULT_OK)
return false;
} else if (result == MOJO_RESULT_SHOULD_WAIT) {
result = Wait(source.get(),
MOJO_HANDLE_SIGNAL_READABLE,
MOJO_DEADLINE_INDEFINITE);
if (result != MOJO_RESULT_OK) {
// If the producer handle was closed, then treat as EOF.
return result == MOJO_RESULT_FAILED_PRECONDITION;
}
} else if (result == MOJO_RESULT_FAILED_PRECONDITION) {
// If the producer handle was closed, then treat as EOF.
return true;
} else {
// Some other error occurred.
break;
}
}
return false;
}
void CompleteBlockingCopyToFile(const base::Callback<void(bool)>& callback,
bool result) {
callback.Run(result);
}
void CopyToFile(ScopedDataPipeConsumerHandle source,
const base::FilePath& destination,
base::TaskRunner* task_runner,
const base::Callback<void(bool)>& callback) {
base::PostTaskAndReplyWithResult(
task_runner,
FROM_HERE,
base::Bind(&BlockingCopyToFile, base::Passed(&source), destination),
callback);
}
} // namespace common
} // namespace mojo
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