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

Issue 16701004: Fix webkit_storage exports definitions (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: rebase Created 7 years, 6 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 "net/base/completion_callback.h" 10 #include "net/base/completion_callback.h"
11 #include "webkit/storage/webkit_storage_export.h" 11 #include "webkit/browser/webkit_storage_browser_export.h"
12 12
13 namespace net { 13 namespace net {
14 class IOBuffer; 14 class IOBuffer;
15 } 15 }
16 16
17 namespace webkit_blob { 17 namespace webkit_blob {
18 18
19 // A generic interface for reading a file-like object. 19 // A generic interface for reading a file-like object.
20 class WEBKIT_STORAGE_EXPORT FileStreamReader { 20 class WEBKIT_STORAGE_BROWSER_EXPORT FileStreamReader {
21 public: 21 public:
22 // It is valid to delete the reader at any time. If the stream is deleted 22 // It is valid to delete the reader at any time. If the stream is deleted
23 // while it has a pending read, its callback will not be called. 23 // while it has a pending read, its callback will not be called.
24 virtual ~FileStreamReader() {} 24 virtual ~FileStreamReader() {}
25 25
26 // Reads from the current cursor position asynchronously. 26 // Reads from the current cursor position asynchronously.
27 // 27 //
28 // Up to buf_len bytes will be copied into buf. (In other words, partial 28 // Up to buf_len bytes will be copied into buf. (In other words, partial
29 // reads are allowed.) Returns the number of bytes copied, 0 if at 29 // reads are allowed.) Returns the number of bytes copied, 0 if at
30 // end-of-file, or an error code if the operation could not be performed. 30 // end-of-file, or an error code if the operation could not be performed.
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47 // |callback| will not be called. 47 // |callback| will not be called.
48 // Note that the return type is int64 to return a larger file's size (a file 48 // Note that the return type is int64 to return a larger file's size (a file
49 // larger than 2G) but an error code should fit in the int range (may be 49 // larger than 2G) but an error code should fit in the int range (may be
50 // smaller than int64 range). 50 // smaller than int64 range).
51 virtual int64 GetLength(const net::Int64CompletionCallback& callback) = 0; 51 virtual int64 GetLength(const net::Int64CompletionCallback& callback) = 0;
52 }; 52 };
53 53
54 } // namespace webkit_blob 54 } // namespace webkit_blob
55 55
56 #endif // WEBKIT_BLOB_FILE_STREAM_READER_H_ 56 #endif // WEBKIT_BLOB_FILE_STREAM_READER_H_
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