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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 1 // Copyright 2014 The Chromium Authors. All rights reserved. |
2 // Use of this source code is governed by a BSD-style license that can be | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include "chrome/browser/chromeos/file_system_provider/fileapi/buffering_file_st
ream_reader.h" | 5 #include "chrome/browser/chromeos/file_system_provider/fileapi/buffering_file_st
ream_reader.h" |
6 | 6 |
7 #include <algorithm> | 7 #include <algorithm> |
8 | 8 |
9 #include "net/base/io_buffer.h" | 9 #include "net/base/io_buffer.h" |
10 #include "net/base/net_errors.h" | 10 #include "net/base/net_errors.h" |
11 #include "storage/browser/fileapi/file_system_backend.h" | 11 #include "storage/browser/fileapi/file_system_backend.h" |
12 | 12 |
13 namespace chromeos { | 13 namespace chromeos { |
14 namespace file_system_provider { | 14 namespace file_system_provider { |
15 | 15 |
16 BufferingFileStreamReader::BufferingFileStreamReader( | 16 BufferingFileStreamReader::BufferingFileStreamReader( |
17 scoped_ptr<storage::FileStreamReader> file_stream_reader, | 17 scoped_ptr<storage::FileStreamReader> file_stream_reader, |
18 int preloading_buffer_length, | 18 int preloading_buffer_length, |
19 int64 max_bytes_to_read) | 19 int64_t max_bytes_to_read) |
20 : file_stream_reader_(file_stream_reader.Pass()), | 20 : file_stream_reader_(file_stream_reader.Pass()), |
21 preloading_buffer_length_(preloading_buffer_length), | 21 preloading_buffer_length_(preloading_buffer_length), |
22 max_bytes_to_read_(max_bytes_to_read), | 22 max_bytes_to_read_(max_bytes_to_read), |
23 bytes_read_(0), | 23 bytes_read_(0), |
24 preloading_buffer_(new net::IOBuffer(preloading_buffer_length)), | 24 preloading_buffer_(new net::IOBuffer(preloading_buffer_length)), |
25 preloading_buffer_offset_(0), | 25 preloading_buffer_offset_(0), |
26 preloaded_bytes_(0), | 26 preloaded_bytes_(0), |
27 weak_ptr_factory_(this) { | 27 weak_ptr_factory_(this) {} |
28 } | |
29 | 28 |
30 BufferingFileStreamReader::~BufferingFileStreamReader() { | 29 BufferingFileStreamReader::~BufferingFileStreamReader() { |
31 } | 30 } |
32 | 31 |
33 int BufferingFileStreamReader::Read(net::IOBuffer* buffer, | 32 int BufferingFileStreamReader::Read(net::IOBuffer* buffer, |
34 int buffer_length, | 33 int buffer_length, |
35 const net::CompletionCallback& callback) { | 34 const net::CompletionCallback& callback) { |
36 // Return as much as available in the internal buffer. It may be less than | 35 // Return as much as available in the internal buffer. It may be less than |
37 // |buffer_length|, what is valid. | 36 // |buffer_length|, what is valid. |
38 const int bytes_read = | 37 const int bytes_read = |
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58 weak_ptr_factory_.GetWeakPtr(), | 57 weak_ptr_factory_.GetWeakPtr(), |
59 base::Bind(&BufferingFileStreamReader::OnPreloadCompleted, | 58 base::Bind(&BufferingFileStreamReader::OnPreloadCompleted, |
60 weak_ptr_factory_.GetWeakPtr(), | 59 weak_ptr_factory_.GetWeakPtr(), |
61 make_scoped_refptr(buffer), | 60 make_scoped_refptr(buffer), |
62 buffer_length, | 61 buffer_length, |
63 callback))); | 62 callback))); |
64 | 63 |
65 return net::ERR_IO_PENDING; | 64 return net::ERR_IO_PENDING; |
66 } | 65 } |
67 | 66 |
68 int64 BufferingFileStreamReader::GetLength( | 67 int64_t BufferingFileStreamReader::GetLength( |
69 const net::Int64CompletionCallback& callback) { | 68 const net::Int64CompletionCallback& callback) { |
70 const int64 result = file_stream_reader_->GetLength(callback); | 69 const int64_t result = file_stream_reader_->GetLength(callback); |
71 DCHECK_EQ(net::ERR_IO_PENDING, result); | 70 DCHECK_EQ(net::ERR_IO_PENDING, result); |
72 | 71 |
73 return result; | 72 return result; |
74 } | 73 } |
75 | 74 |
76 int BufferingFileStreamReader::CopyFromPreloadingBuffer( | 75 int BufferingFileStreamReader::CopyFromPreloadingBuffer( |
77 scoped_refptr<net::IOBuffer> buffer, | 76 scoped_refptr<net::IOBuffer> buffer, |
78 int buffer_length) { | 77 int buffer_length) { |
79 const int read_bytes = std::min(buffer_length, preloaded_bytes_); | 78 const int read_bytes = std::min(buffer_length, preloaded_bytes_); |
80 | 79 |
81 memcpy(buffer->data(), | 80 memcpy(buffer->data(), |
82 preloading_buffer_->data() + preloading_buffer_offset_, | 81 preloading_buffer_->data() + preloading_buffer_offset_, |
83 read_bytes); | 82 read_bytes); |
84 preloading_buffer_offset_ += read_bytes; | 83 preloading_buffer_offset_ += read_bytes; |
85 preloaded_bytes_ -= read_bytes; | 84 preloaded_bytes_ -= read_bytes; |
86 | 85 |
87 return read_bytes; | 86 return read_bytes; |
88 } | 87 } |
89 | 88 |
90 void BufferingFileStreamReader::Preload( | 89 void BufferingFileStreamReader::Preload( |
91 const net::CompletionCallback& callback) { | 90 const net::CompletionCallback& callback) { |
92 const int preload_bytes = | 91 const int preload_bytes = |
93 std::min(static_cast<int64>(preloading_buffer_length_), | 92 std::min(static_cast<int64_t>(preloading_buffer_length_), |
94 max_bytes_to_read_ - bytes_read_); | 93 max_bytes_to_read_ - bytes_read_); |
95 | 94 |
96 const int result = file_stream_reader_->Read( | 95 const int result = file_stream_reader_->Read( |
97 preloading_buffer_.get(), preload_bytes, callback); | 96 preloading_buffer_.get(), preload_bytes, callback); |
98 DCHECK_EQ(result, net::ERR_IO_PENDING); | 97 DCHECK_EQ(result, net::ERR_IO_PENDING); |
99 } | 98 } |
100 | 99 |
101 void BufferingFileStreamReader::OnPreloadCompleted( | 100 void BufferingFileStreamReader::OnPreloadCompleted( |
102 scoped_refptr<net::IOBuffer> buffer, | 101 scoped_refptr<net::IOBuffer> buffer, |
103 int buffer_length, | 102 int buffer_length, |
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131 } | 130 } |
132 | 131 |
133 bytes_read_ += result; | 132 bytes_read_ += result; |
134 DCHECK_LE(bytes_read_, max_bytes_to_read_); | 133 DCHECK_LE(bytes_read_, max_bytes_to_read_); |
135 | 134 |
136 callback.Run(result); | 135 callback.Run(result); |
137 } | 136 } |
138 | 137 |
139 } // namespace file_system_provider | 138 } // namespace file_system_provider |
140 } // namespace chromeos | 139 } // namespace chromeos |
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