| // Copyright (c) 2012 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. |
| |
| #ifndef ANDROID_WEBVIEW_BROWSER_INPUT_STREAM_H_ |
| #define ANDROID_WEBVIEW_BROWSER_INPUT_STREAM_H_ |
| |
| #include "base/basictypes.h" |
| |
| namespace net { |
| class IOBuffer; |
| } |
| |
| namespace android_webview { |
| |
| // Abstract wrapper used to access the InputStream Java class. |
| // This class is safe to pass around between threads (the destructor, |
| // constructor and methods can be called on different threads) but calling |
| // methods concurrently might have undefined results. |
| class InputStream { |
| public: |
| virtual ~InputStream() {} |
| |
| // Sets |bytes_available| to the number of bytes that can be read (or skipped |
| // over) from this input stream without blocking by the next caller of a |
| // method for this input stream. |
| // Returns true if completed successfully or false if an exception was |
| // thrown. |
| virtual bool BytesAvailable(int* bytes_available) const = 0; |
| |
| // Skips over and discards |n| bytes of data from this input stream. Sets |
| // |bytes_skipped| to the number of of bytes skipped. |
| // Returns true if completed successfully or false if an exception was |
| // thrown. |
| virtual bool Skip(int64_t n, int64_t* bytes_skipped) = 0; |
| |
| // Reads at most |length| bytes into |dest|. Sets |bytes_read| to the total |
| // number of bytes read into |dest| or 0 if there is no more data because the |
| // end of the stream was reached. |
| // |dest| must be at least |length| in size. |
| // Returns true if completed successfully or false if an exception was |
| // thrown. |
| virtual bool Read(net::IOBuffer* dest, int length, int* bytes_read) = 0; |
| |
| protected: |
| InputStream() {} |
| }; |
| |
| } // namespace android_webview |
| |
| #endif // ANDROID_WEBVIEW_BROWSER_INPUT_STREAM_H_ |