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120 lines
4.6 KiB
C++
120 lines
4.6 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Netscape Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/NPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the License.
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*
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* The Original Code is mozilla.org code.
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*
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* The Initial Developer of the Original Code is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1999 Netscape Communications Corporation. All
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* Rights Reserved.
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*
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* Contributor(s):
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*/
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#ifndef _nsMsgLineBuffer_H
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#define _nsMsgLineBuffer_H
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#include "msgCore.h" // precompiled header...
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// I can't believe I have to have this stupid class, but I can't find
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// anything suitable (nsStrImpl might be, when its done). nsIByteBuffer
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// would do, if I had a stream for input, which I don't.
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class NS_MSG_BASE nsByteArray
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{
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public:
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nsByteArray();
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virtual ~nsByteArray();
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PRUint32 GetSize() {return m_bufferSize;}
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PRUint32 GetBufferPos() {return m_bufferPos;}
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nsresult GrowBuffer(PRUint32 desired_size, PRUint32 quantum = 1024);
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nsresult AppendString(const char *string);
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nsresult AppendBuffer(const char *buffer, PRUint32 length);
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void ResetWritePos() {m_bufferPos = 0;}
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char *GetBuffer() {return m_buffer;}
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protected:
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char *m_buffer;
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PRUint32 m_bufferSize;
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PRUint32 m_bufferPos; // write Pos in m_buffer - where the next byte should go.
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};
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class NS_MSG_BASE nsMsgLineBufferHandler : public nsByteArray
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{
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public:
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virtual PRInt32 HandleLine(char *line, PRUint32 line_length) = 0;
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};
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class NS_MSG_BASE nsMsgLineBuffer : public nsByteArray
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{
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public:
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nsMsgLineBuffer(nsMsgLineBufferHandler *handler, PRBool convertNewlinesP);
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virtual ~nsMsgLineBuffer();
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PRInt32 BufferInput(const char *net_buffer, PRInt32 net_buffer_size);
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// Not sure why anyone cares, by NNTPHost seems to want to know the buf pos.
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PRUint32 GetBufferPos() {return m_bufferPos;}
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virtual PRInt32 HandleLine(char *line, PRUint32 line_length);
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// flush last line, though it won't be CRLF terminated.
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virtual PRInt32 FlushLastLine();
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protected:
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nsMsgLineBuffer(PRBool convertNewlinesP);
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PRInt32 ConvertAndSendBuffer();
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void SetLookingForCRLF(PRBool b);
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nsMsgLineBufferHandler *m_handler;
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PRBool m_convertNewlinesP;
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PRBool m_lookingForCRLF;
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};
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// I'm adding this utility class here for lack of a better place. This utility class is similar to nsMsgLineBuffer
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// except it works from an input stream. It is geared towards efficiently parsing new lines out of a stream by storing
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// read but unprocessed bytes in a buffer. I envision the primary use of this to be our mail protocols such as imap, news and
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// pop which need to process line by line data being returned in the form of a proxied stream from the server.
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class nsIInputStream;
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class NS_MSG_BASE nsMsgLineStreamBuffer
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{
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public:
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// aBufferSize -- size of the buffer you want us to use for buffering stream data
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// aEndOfLinetoken -- The delimeter string to be used for determining the end of line. This
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// allows us to parse platform specific end of line endings by making it
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// a parameter.
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// aAllocateNewLines -- PR_TRUE if you want calls to ReadNextLine to allocate new memory for the line.
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// if false, the char * returned is just a ptr into the buffer. Subsequent calls to
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// ReadNextLine will alter the data so your ptr only has a life time of a per call.
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// aEatCRLFs -- PR_TRUE if you don't want to see the CRLFs on the lines returned by ReadNextLine.
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// PR_FALSE if you do want to see them.
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nsMsgLineStreamBuffer(PRUint32 aBufferSize, const char * aEndOfLineToken, PRBool aAllocateNewLines, PRBool aEatCRLFs = PR_TRUE); // specify the size of the buffer you want the class to use....
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virtual ~nsMsgLineStreamBuffer();
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// Caller must free the line returned using PR_Free
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// aEndOfLinetoken -- delimeter used to denote the end of a line.
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// aNumBytesInLine -- The number of bytes in the line returned
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// aPauseForMoreData -- There is not enough data in the stream to make a line at this time...
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char * ReadNextLine(nsIInputStream * aInputStream, PRUint32 &anumBytesInLine, PRBool &aPauseForMoreData);
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nsresult GrowBuffer(PRInt32 desiredSize);
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protected:
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PRBool m_eatCRLFs;
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PRBool m_allocateNewLines;
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char * m_dataBuffer;
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const char * m_endOfLineToken;
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PRUint32 m_dataBufferSize;
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PRUint32 m_startPos;
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PRUint32 m_numBytesInBuffer;
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};
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#endif
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