DataStream.cxx

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#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
 
#include "rutil/ResipAssert.h"
#include "rutil/DataStream.hxx"
#include "rutil/Data.hxx"
 
// Remove warning about 'this' use in initiator list - pointer is only stored
#if defined(WIN32) && !defined(__GNUC__)
#pragma warning( disable : 4355 ) // using this in base member initializer list 
#endif
 
using namespace resip;
 
DataBuffer::DataBuffer(Data& str)
   : mStr(str)
{
#ifdef RESIP_USE_STL_STREAMS
   char* gbuf = const_cast<char*>(mStr.mBuf);
   setg(gbuf, gbuf, gbuf+mStr.size());
   // expose the excess capacity as the put buffer
   setp(gbuf+mStr.mSize, gbuf+mStr.mCapacity);
#endif
}
 
DataBuffer::~DataBuffer()
{}
 
#ifndef RESIP_USE_STL_STREAMS
uint64_t DataBuffer::tellpbuf(void)
{ 
   return mStr.size(); 
}
 
size_t DataBuffer::readbuf(char *buf, size_t count)
{
   if (count <= 0)
   {
      return 0;
   }
 
   if (!buf)
   {
      resip_assert(0);
      return 0;
   }
 
   size_t cursize = mStr.size();
 
   size_t toread = (cursize < count) ? (cursize) : (count);
 
   memcpy(buf,mStr.begin(),toread);
 
   //wow, not efficient.  Just added this function for repro, need to revisit. @TODO.
   mStr = mStr.substr(toread);
 
   return toread;
}
 
size_t DataBuffer::writebuf(const char *str, size_t count)
{
   if( count <= 0 )
   {
      return 0;
   }
 
   mStr.append(str,count);
   return count;
}
size_t DataBuffer::putbuf(char ch)
{
   mStr += ch;
 
   return 1;
}
#else
int
DataBuffer::sync()
{
   Data::size_type len = (Data::size_type)(pptr() - pbase());
   if (len > 0)
   {
      size_t pos = gptr() - eback();  // remember the get position
      mStr.mSize += len;
      char* gbuf = const_cast<char*>(mStr.data());
      // reset the get buffer
      setg(gbuf, gbuf+pos, gbuf+mStr.size());
      // reset the put buffer
      setp(gbuf + mStr.mSize, gbuf + mStr.mCapacity);
   }
   return 0;
}
 
int
DataBuffer::overflow(int c)
{
   // sync, but reallocate
   Data::size_type len = (Data::size_type)(pptr() - pbase());
   // .kw. test below is always true. Checked with David Butcher
   // and he says this is safe but perhaps performs unrequired
   // re-allocs.
   if (len >= 0)
   {
      size_t pos = gptr() - eback();  // remember the get position
 
      // update the length
      mStr.mSize += len;
 
      // resize the underlying Data and reset the input buffer
      mStr.resize(((mStr.mCapacity+16)*3)/2, true);
 
      char* gbuf = const_cast<char*>(mStr.mBuf);
      // reset the get buffer
      setg(gbuf, gbuf+pos, gbuf+mStr.mSize);
      // reset the put buffer
      setp(gbuf + mStr.mSize, gbuf + mStr.mCapacity);
   }
   if (c != -1)
   {
      mStr.mBuf[mStr.mSize] = c;
      pbump(1);
      return c;
   }
   return 0;
}
#endif
 
iDataStream::iDataStream(Data& str)
   : DataBuffer(str), 
     DecodeStream(this)
{
}
 
iDataStream::~iDataStream()
{}
 
oDataStream::oDataStream(Data& str)
   : DataBuffer(str), 
   EncodeStream(this)
{
   // don't call this with a read-only buffer!
   resip_assert(str.mShareEnum != Data::Share);
}
 
oDataStream::~oDataStream()
{
   flush();
}
 
void
oDataStream::reset()
{
   flush();
   mStr.clear();
#ifdef RESIP_USE_STL_STREAMS
   // reset the underlying buffer state
   char* gbuf = const_cast<char*>(mStr.mBuf);
   setg(gbuf, gbuf, gbuf+mStr.size());
   setp(gbuf+mStr.mSize, gbuf+mStr.mCapacity);
#endif
}
 
DataStream::DataStream(Data& str)
   : DataBuffer(str), 
#ifdef  RESIP_USE_STL_STREAMS
     std::iostream(this)
#else
   ResipFastOStream(this)
#endif
{
   // don't call this with a read-only buffer!
   resip_assert(str.mShareEnum != Data::Share);
}
 
DataStream::~DataStream()
{
   flush();
}
 
/* ====================================================================
 * The Vovida Software License, Version 1.0
 *
 * Copyright 2000-2005
 *
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 * modification, are permitted provided that the following conditions
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 *
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 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 * 3. The names "VOCAL", "Vovida Open Communication Application Library",
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 *    permission, please contact vocal@vovida.org.
 *
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 * ====================================================================
 * 
 * This software consists of voluntary contributions made by Vovida
 * Networks, Inc. and many individuals on behalf of Vovida Networks,
 * Inc.  For more information on Vovida Networks, Inc., please see
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 *
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