OW_UnnamedPipe.cpp

Go to the documentation of this file.

/*******************************************************************************
* Copyright (C) 2001-2004 Vintela, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are met:
*
*  - Redistributions of source code must retain the above copyright notice,
*    this list of conditions and the following disclaimer.
*
*  - Redistributions in binary form must reproduce the above copyright notice,
*    this list of conditions and the following disclaimer in the documentation
*    and/or other materials provided with the distribution.
*
*  - Neither the name of Vintela, Inc. nor the names of its
*    contributors may be used to endorse or promote products derived from this
*    software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL Vintela, Inc. OR THE CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
* POSSIBILITY OF SUCH DAMAGE.
*******************************************************************************/

#include "OW_config.h"
#include "OW_UnnamedPipe.hpp"
#include "OW_AutoPtr.hpp"
#include "OW_String.hpp"
#include "OW_StringBuffer.hpp"
#include "OW_ExceptionIds.hpp"

namespace OW_NAMESPACE
{

OW_DEFINE_EXCEPTION_WITH_ID(UnnamedPipe);

UnnamedPipe::~UnnamedPipe()
{
}
int
UnnamedPipe::writeInt(int value)
{
   return this->write(&value, sizeof(int));
}
int
UnnamedPipe::writeString(const String& strData)
{
   int rc;
   int len = static_cast<int>(strData.length()+1);
   if ((rc = this->writeInt(len)) != -1)
   {
      rc = this->write(strData.c_str(), len);
   }
   return rc;
}
int
UnnamedPipe::readInt(int* value)
{
   return this->read(value, sizeof(int));
}
int
UnnamedPipe::readString(String& strData)
{
   int len;
   int rc;
   
   if ((rc = this->readInt(&len)) != -1)
   {
      AutoPtrVec<char> p(new char[len+1]);

      // writeString() writes the '\0' terminator, so we don't worry about it here.
      if ((rc = this->read(p.get(), len)) != -1)
      {  
         strData = String(String::E_TAKE_OWNERSHIP, p.release(), len);
      }
   }
   return rc;
}
String
UnnamedPipe::readAll()
{
   char buf[1024];
   int readbytes;
   StringBuffer retval;
   do
   {
      readbytes = this->read(buf, sizeof(buf)-1, true); // throws on error
      buf[readbytes] = 0; // null-terminate the buffer
      retval += buf;
   } while (readbytes > 0); // keep going until we don't fill up the buffer.
   return retval.releaseString();
}

} // end namespace OW_NAMESPACE

---