UnnamedPipe.cpp

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#include "blocxx/BLOCXX_config.h"
#include "blocxx/UnnamedPipe.hpp"
#include "blocxx/AutoPtr.hpp"
#include "blocxx/String.hpp"
#include "blocxx/StringBuffer.hpp"
#include "blocxx/ExceptionIds.hpp"
 
#ifdef BLOCXX_HAVE_UNISTD_H
#include <unistd.h> // for dup()
#endif
 
#include <sys/types.h>
#ifdef BLOCXX_WIN32
#include "blocxx/WinUnnamedPipe.hpp"
#else
#include "blocxx/PosixUnnamedPipe.hpp"
#include <sys/socket.h> // for socketpair()
#endif
 
 
namespace BLOCXX_NAMESPACE
{
 
BLOCXX_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, E_THROW_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();
}
 
// STATIC
UnnamedPipeRef
UnnamedPipe::createUnnamedPipe(EOpen doOpen)
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createUnnamedPipe(doOpen);
#else
   return UnnamedPipeRef(new PosixUnnamedPipe(doOpen));
#endif
}
 
// STATIC
UnnamedPipeRef
UnnamedPipe::createStdin()
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createStdin();
#else
   AutoDescriptor duped(::dup(0));
   if (duped.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createStdin(): dup():");
   }
   return UnnamedPipeRef(new PosixUnnamedPipe(duped, AutoDescriptor()));
#endif
}
 
// STATIC
UnnamedPipeRef
UnnamedPipe::createStdout()
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createStdout();
#else
   AutoDescriptor duped(::dup(1));
   if (duped.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createStdout(): dup():");
   }
   return UnnamedPipeRef(new PosixUnnamedPipe(AutoDescriptor(), duped));
#endif
}
 
// STATIC
UnnamedPipeRef
UnnamedPipe::createStdinStdout()
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createStdinStdout();
#else
   AutoDescriptor dupedIn(::dup(0));
   if (dupedIn.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createStdout(): dup():");
   }
   AutoDescriptor dupedOut(::dup(1));
   if (dupedOut.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createStdout(): dup():");
   }
   return UnnamedPipeRef(new PosixUnnamedPipe(dupedIn, dupedOut));
#endif
}
 
// STATIC
UnnamedPipeRef
UnnamedPipe::createStderr()
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createStderr();
#else
   AutoDescriptor duped(::dup(2));
   if (duped.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createStderr(): dup():");
   }
   return UnnamedPipeRef(new PosixUnnamedPipe(AutoDescriptor(), duped));
#endif
}
 
// static 
UnnamedPipeRef 
UnnamedPipe::createUnnamedPipeFromDescriptor(AutoDescriptor inputAndOutput)
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createUnnamedPipeFromDescriptor(inputAndOutput);
#else
   AutoDescriptor duped(::dup(inputAndOutput.get()));
   if (duped.get() == BLOCXX_INVALID_HANDLE)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "UnnamedPipe::createUnnamedPipeFromDescriptor(): dup():");
   }
   return UnnamedPipeRef(new PosixUnnamedPipe(inputAndOutput, duped));
#endif
}
 
// static 
UnnamedPipeRef 
UnnamedPipe::createUnnamedPipeFromDescriptor(AutoDescriptor input, AutoDescriptor output)
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createUnnamedPipeFromDescriptor(input, output);
#else
   return UnnamedPipeRef(new PosixUnnamedPipe(input, output));
#endif
}
 
// static 
void
UnnamedPipe::createConnectedPipes(UnnamedPipeRef& first, UnnamedPipeRef& second)
{
#ifdef BLOCXX_WIN32
   return WinUnnamedPipe::createConnectedPipes(first, second);
#else
   int fds[2];
   if (::socketpair(AF_UNIX, SOCK_STREAM, 0, fds) == -1)
   {
      BLOCXX_THROW_ERRNO_MSG(UnnamedPipeException, "PosixUnamedPipe::open(): soketpair()");
   }
   first = createUnnamedPipeFromDescriptor(AutoDescriptor(fds[0]));
   second = createUnnamedPipeFromDescriptor(AutoDescriptor(fds[1]));
#endif
}
 
} // end namespace BLOCXX_NAMESPACE