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comparison: netwerk/base/src/nsBufferedStreams.h
netwerk/base/src/nsBufferedStreams.h
- changeset 0
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| -1:000000000000 | 0:1a22e014fef8 |
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| 1 /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ | |
| 2 /* This Source Code Form is subject to the terms of the Mozilla Public | |
| 3 * License, v. 2.0. If a copy of the MPL was not distributed with this | |
| 4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ | |
| 5 | |
| 6 #ifndef nsBufferedStreams_h__ | |
| 7 #define nsBufferedStreams_h__ | |
| 8 | |
| 9 #include "nsIBufferedStreams.h" | |
| 10 #include "nsIInputStream.h" | |
| 11 #include "nsIOutputStream.h" | |
| 12 #include "nsISafeOutputStream.h" | |
| 13 #include "nsISeekableStream.h" | |
| 14 #include "nsIStreamBufferAccess.h" | |
| 15 #include "nsCOMPtr.h" | |
| 16 #include "nsIIPCSerializableInputStream.h" | |
| 17 | |
| 18 //////////////////////////////////////////////////////////////////////////////// | |
| 19 | |
| 20 class nsBufferedStream : public nsISeekableStream | |
| 21 { | |
| 22 public: | |
| 23 NS_DECL_THREADSAFE_ISUPPORTS | |
| 24 NS_DECL_NSISEEKABLESTREAM | |
| 25 | |
| 26 nsBufferedStream(); | |
| 27 virtual ~nsBufferedStream(); | |
| 28 | |
| 29 nsresult Close(); | |
| 30 | |
| 31 protected: | |
| 32 nsresult Init(nsISupports* stream, uint32_t bufferSize); | |
| 33 NS_IMETHOD Fill() = 0; | |
| 34 NS_IMETHOD Flush() = 0; | |
| 35 | |
| 36 uint32_t mBufferSize; | |
| 37 char* mBuffer; | |
| 38 | |
| 39 // mBufferStartOffset is the offset relative to the start of mStream. | |
| 40 int64_t mBufferStartOffset; | |
| 41 | |
| 42 // mCursor is the read cursor for input streams, or write cursor for | |
| 43 // output streams, and is relative to mBufferStartOffset. | |
| 44 uint32_t mCursor; | |
| 45 | |
| 46 // mFillPoint is the amount available in the buffer for input streams, | |
| 47 // or the high watermark of bytes written into the buffer, and therefore | |
| 48 // is relative to mBufferStartOffset. | |
| 49 uint32_t mFillPoint; | |
| 50 | |
| 51 nsISupports* mStream; // cast to appropriate subclass | |
| 52 | |
| 53 bool mBufferDisabled; | |
| 54 bool mEOF; // True if mStream is at EOF | |
| 55 uint8_t mGetBufferCount; | |
| 56 }; | |
| 57 | |
| 58 //////////////////////////////////////////////////////////////////////////////// | |
| 59 | |
| 60 class nsBufferedInputStream : public nsBufferedStream, | |
| 61 public nsIBufferedInputStream, | |
| 62 public nsIStreamBufferAccess, | |
| 63 public nsIIPCSerializableInputStream | |
| 64 { | |
| 65 public: | |
| 66 NS_DECL_ISUPPORTS_INHERITED | |
| 67 NS_DECL_NSIINPUTSTREAM | |
| 68 NS_DECL_NSIBUFFEREDINPUTSTREAM | |
| 69 NS_DECL_NSISTREAMBUFFERACCESS | |
| 70 NS_DECL_NSIIPCSERIALIZABLEINPUTSTREAM | |
| 71 | |
| 72 nsBufferedInputStream() : nsBufferedStream() {} | |
| 73 virtual ~nsBufferedInputStream() {} | |
| 74 | |
| 75 static nsresult | |
| 76 Create(nsISupports *aOuter, REFNSIID aIID, void **aResult); | |
| 77 | |
| 78 nsIInputStream* Source() { | |
| 79 return (nsIInputStream*)mStream; | |
| 80 } | |
| 81 | |
| 82 protected: | |
| 83 NS_IMETHOD Fill(); | |
| 84 NS_IMETHOD Flush() { return NS_OK; } // no-op for input streams | |
| 85 }; | |
| 86 | |
| 87 //////////////////////////////////////////////////////////////////////////////// | |
| 88 | |
| 89 class nsBufferedOutputStream : public nsBufferedStream, | |
| 90 public nsISafeOutputStream, | |
| 91 public nsIBufferedOutputStream, | |
| 92 public nsIStreamBufferAccess | |
| 93 { | |
| 94 public: | |
| 95 NS_DECL_ISUPPORTS_INHERITED | |
| 96 NS_DECL_NSIOUTPUTSTREAM | |
| 97 NS_DECL_NSISAFEOUTPUTSTREAM | |
| 98 NS_DECL_NSIBUFFEREDOUTPUTSTREAM | |
| 99 NS_DECL_NSISTREAMBUFFERACCESS | |
| 100 | |
| 101 nsBufferedOutputStream() : nsBufferedStream() {} | |
| 102 virtual ~nsBufferedOutputStream() { nsBufferedOutputStream::Close(); } | |
| 103 | |
| 104 static nsresult | |
| 105 Create(nsISupports *aOuter, REFNSIID aIID, void **aResult); | |
| 106 | |
| 107 nsIOutputStream* Sink() { | |
| 108 return (nsIOutputStream*)mStream; | |
| 109 } | |
| 110 | |
| 111 protected: | |
| 112 NS_IMETHOD Fill() { return NS_OK; } // no-op for input streams | |
| 113 | |
| 114 nsCOMPtr<nsISafeOutputStream> mSafeStream; // QI'd from mStream | |
| 115 }; | |
| 116 | |
| 117 //////////////////////////////////////////////////////////////////////////////// | |
| 118 | |
| 119 #endif // nsBufferedStreams_h__ |
