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Side by Side Diff: webkit/browser/blob/file_stream_reader.h

Issue 498273002: Rename storage-related export macros and build targets (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Created 6 years, 3 months ago
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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 1 // Copyright (c) 2012 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 #ifndef WEBKIT_BLOB_FILE_STREAM_READER_H_ 5 #ifndef WEBKIT_BLOB_FILE_STREAM_READER_H_
6 #define WEBKIT_BLOB_FILE_STREAM_READER_H_ 6 #define WEBKIT_BLOB_FILE_STREAM_READER_H_
7 7
8 #include "base/basictypes.h" 8 #include "base/basictypes.h"
9 #include "base/compiler_specific.h" 9 #include "base/compiler_specific.h"
10 #include "base/files/file.h" 10 #include "base/files/file.h"
11 #include "net/base/completion_callback.h" 11 #include "net/base/completion_callback.h"
12 #include "webkit/browser/webkit_storage_browser_export.h" 12 #include "webkit/browser/storage_export.h"
13 13
14 namespace base { 14 namespace base {
15 class FilePath; 15 class FilePath;
16 class TaskRunner; 16 class TaskRunner;
17 class Time; 17 class Time;
18 } 18 }
19 19
20 namespace net { 20 namespace net {
21 class IOBuffer; 21 class IOBuffer;
22 } 22 }
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33 public: 33 public:
34 // Creates a new FileReader for a local file |file_path|. 34 // Creates a new FileReader for a local file |file_path|.
35 // |initial_offset| specifies the offset in the file where the first read 35 // |initial_offset| specifies the offset in the file where the first read
36 // should start. If the given offset is out of the file range any 36 // should start. If the given offset is out of the file range any
37 // read operation may error out with net::ERR_REQUEST_RANGE_NOT_SATISFIABLE. 37 // read operation may error out with net::ERR_REQUEST_RANGE_NOT_SATISFIABLE.
38 // |expected_modification_time| specifies the expected last modification 38 // |expected_modification_time| specifies the expected last modification
39 // If the value is non-null, the reader will check the underlying file's 39 // If the value is non-null, the reader will check the underlying file's
40 // actual modification time to see if the file has been modified, and if 40 // actual modification time to see if the file has been modified, and if
41 // it does any succeeding read operations should fail with 41 // it does any succeeding read operations should fail with
42 // ERR_UPLOAD_FILE_CHANGED error. 42 // ERR_UPLOAD_FILE_CHANGED error.
43 WEBKIT_STORAGE_BROWSER_EXPORT static FileStreamReader* 43 STORAGE_EXPORT static FileStreamReader*
44 CreateForLocalFile(base::TaskRunner* task_runner, 44 CreateForLocalFile(base::TaskRunner* task_runner,
45 const base::FilePath& file_path, 45 const base::FilePath& file_path,
46 int64 initial_offset, 46 int64 initial_offset,
47 const base::Time& expected_modification_time); 47 const base::Time& expected_modification_time);
48 48
49 // Creates a new reader for a filesystem URL |url| form |initial_offset|. 49 // Creates a new reader for a filesystem URL |url| form |initial_offset|.
50 // |expected_modification_time| specifies the expected last modification if 50 // |expected_modification_time| specifies the expected last modification if
51 // the value is non-null, the reader will check the underlying file's actual 51 // the value is non-null, the reader will check the underlying file's actual
52 // modification time to see if the file has been modified, and if it does any 52 // modification time to see if the file has been modified, and if it does any
53 // succeeding read operations should fail with ERR_UPLOAD_FILE_CHANGED error. 53 // succeeding read operations should fail with ERR_UPLOAD_FILE_CHANGED error.
54 WEBKIT_STORAGE_BROWSER_EXPORT static FileStreamReader* 54 STORAGE_EXPORT static FileStreamReader*
55 CreateForFileSystemFile(storage::FileSystemContext* context, 55 CreateForFileSystemFile(storage::FileSystemContext* context,
56 const storage::FileSystemURL& url, 56 const storage::FileSystemURL& url,
57 int64 initial_offset, 57 int64 initial_offset,
58 const base::Time& expected_modification_time); 58 const base::Time& expected_modification_time);
59 59
60 // Verify if the underlying file has not been modified. 60 // Verify if the underlying file has not been modified.
61 WEBKIT_STORAGE_BROWSER_EXPORT static bool VerifySnapshotTime( 61 STORAGE_EXPORT static bool VerifySnapshotTime(
62 const base::Time& expected_modification_time, 62 const base::Time& expected_modification_time,
63 const base::File::Info& file_info); 63 const base::File::Info& file_info);
64 64
65 // It is valid to delete the reader at any time. If the stream is deleted 65 // It is valid to delete the reader at any time. If the stream is deleted
66 // while it has a pending read, its callback will not be called. 66 // while it has a pending read, its callback will not be called.
67 virtual ~FileStreamReader() {} 67 virtual ~FileStreamReader() {}
68 68
69 // Reads from the current cursor position asynchronously. 69 // Reads from the current cursor position asynchronously.
70 // 70 //
71 // Up to buf_len bytes will be copied into buf. (In other words, partial 71 // Up to buf_len bytes will be copied into buf. (In other words, partial
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90 // |callback| will not be called. 90 // |callback| will not be called.
91 // Note that the return type is int64 to return a larger file's size (a file 91 // Note that the return type is int64 to return a larger file's size (a file
92 // larger than 2G) but an error code should fit in the int range (may be 92 // larger than 2G) but an error code should fit in the int range (may be
93 // smaller than int64 range). 93 // smaller than int64 range).
94 virtual int64 GetLength(const net::Int64CompletionCallback& callback) = 0; 94 virtual int64 GetLength(const net::Int64CompletionCallback& callback) = 0;
95 }; 95 };
96 96
97 } // namespace storage 97 } // namespace storage
98 98
99 #endif // WEBKIT_BLOB_FILE_STREAM_READER_H_ 99 #endif // WEBKIT_BLOB_FILE_STREAM_READER_H_
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