LazyParser.cxx

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#if defined(HAVE_CONFIG_H)
#include "config.h"
#endif


#include <cassert>

#include "resip/stack/Headers.hxx"
#include "resip/stack/HeaderFieldValue.hxx"
#include "resip/stack/LazyParser.hxx"
#include "rutil/ParseBuffer.hxx"
#include "rutil/WinLeakCheck.hxx"

using namespace resip;

LazyParser::LazyParser(const HeaderFieldValue& headerFieldValue)
   : mHeaderField(headerFieldValue, HeaderFieldValue::NoOwnership),
      mState(mHeaderField.getBuffer() == 0 ? DIRTY : NOT_PARSED)
{
}

LazyParser::LazyParser(const HeaderFieldValue& headerFieldValue,
                        HeaderFieldValue::CopyPaddingEnum e)
   : mHeaderField(headerFieldValue, e), // Causes ownership to be taken. Oh well
      mState(mHeaderField.getBuffer() == 0 ? DIRTY : NOT_PARSED)
{}

LazyParser::LazyParser(const char* buf, int length) :
   mHeaderField(buf, length),
   mState(buf == 0 ? DIRTY : NOT_PARSED)
{}

LazyParser::LazyParser()
   : mHeaderField(),
      mState(DIRTY)
{
}

LazyParser::LazyParser(const LazyParser& rhs)
   : mHeaderField((rhs.mState==DIRTY ? HeaderFieldValue::Empty : rhs.mHeaderField)), // Pretty cheap when rhs is DIRTY
      mState(rhs.mState)
{}

LazyParser::LazyParser(const LazyParser& rhs,HeaderFieldValue::CopyPaddingEnum e)
   :  mHeaderField((rhs.mState==DIRTY ? HeaderFieldValue::Empty : rhs.mHeaderField), e), // Pretty cheap when rhs is DIRTY
      mState(rhs.mState)
{}


LazyParser::~LazyParser()
{
   clear();
}

LazyParser&
LazyParser::operator=(const LazyParser& rhs)
{
   assert( &rhs != 0 );
   
   if (this != &rhs)
   {
      clear();
      mState = rhs.mState;
      if (rhs.mState!=DIRTY)
      {
         mHeaderField=rhs.mHeaderField;
      }
   }
   return *this;
}

void
LazyParser::doParse() const
{
   LazyParser* ncThis = const_cast<LazyParser*>(this);
   // .bwc. We assume the worst, and if the parse succeeds, we update.
   ncThis->mState = MALFORMED;
   ParseBuffer pb(mHeaderField.getBuffer(), mHeaderField.getLength(), errorContext());
   ncThis->parse(pb);
   // .bwc. If we get this far without throwing, the parse has succeeded.
   ncThis->mState = WELL_FORMED;
}

bool
LazyParser::isWellFormed() const
{
   try
   {
      checkParsed();
   }
   catch(resip::ParseException&)
   {
   }
   
   return (mState!=MALFORMED);
}

void
LazyParser::clear()
{
   mHeaderField.clear();
}

EncodeStream&
LazyParser::encode(EncodeStream& str) const
{
   if (mState == DIRTY)
   {
      return encodeParsed(str);
   }
   else
   {
      mHeaderField.encode(str);
      return str;
   }
}

#ifndef  RESIP_USE_STL_STREAMS
EncodeStream&
resip::operator<<(EncodeStream&s, const LazyParser& lp)
{
   lp.encode(s);
   return s; 
}
#endif

std::ostream&
resip::operator<<(std::ostream &s, const LazyParser& lp)
{       
#ifdef  RESIP_USE_STL_STREAMS
        lp.encode(s);
#else
        //this should only be called for things like cout,cerr, or other streams not supporting
        //other stream encoders, aka MD5Stream
        Data data;
        DataStream stream(data);

        lp.encode(stream);
        stream.flush();
        s << data.c_str();
#endif
   return s; 
}
/* ====================================================================
 * The Vovida Software License, Version 1.0 
 * 
 * Copyright (c) 2000 Vovida Networks, Inc.  All rights reserved.
 * 
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
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 * ====================================================================
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 * This software consists of voluntary contributions made by Vovida
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