InputCommBuffer.cpp

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#include <InputCommBuffer.h>
#include <OutputCommBuffer.h>
#include <assert.h>
 
InputCommBuffer::InputCommBuffer()
{
  set_error_action(ERROR_CONTINUE);
  bin_ = 1;
  // Communication buffer should never try to convert int into long:
  avoid_conversion_ = true;
  memorysize_ = 16;
  size_ = 0;
  // Always allocate something (create_stream needs at least one byte
  // to create a stream of size zero)
  buffer_ = new char[memorysize_]();
  stream_ = 0;
}
 
InputCommBuffer::~InputCommBuffer()
{
  assert(stream_ == 0);
  delete[] buffer_;
  buffer_ = 0;
  size_ = 0;
  memorysize_ = 0;
}
 
char * InputCommBuffer::reserve_buffer(int bufsize)
{
  assert(stream_ == 0);
  size_ = bufsize;
  if (size_ > memorysize_)
    {
      delete[] buffer_;
      memorysize_ = size_ * 2;
      buffer_ = new char[memorysize_]();
    }
  return buffer_;
}
 
void InputCommBuffer::create_stream()
{
  assert(stream_ == 0);
  assert(size_ >= 0);
  // (See documentation of istrstream):
  // If size_ > 0, istrstream(buf, size_) creates a buffer of size size_.
  // If size_ = 0, istrstream(buf, size_) assumes that buf is a null-terminated
  //  string. To create a stream of size zero, do the following:
  if (size_ == 0)
    buffer_[0] = 0;
  stream_ = new istringstream(std::string(buffer_, size_));
  set_istream(stream_);
}
 
void InputCommBuffer::create_stream_from_output_stream(OutputCommBuffer& output_buf)
{
  assert(stream_ == 0);
  const char nullchar = 0;
  const char * buffer = output_buf.get_buffer();
  const int size = output_buf.get_buffer_size();
  // (See documentation of istrstream):
  // If size_ > 0, istrstream(buf, size_) creates a buffer of size size_.
  // If size_ = 0, istrstream(buf, size_) assumes that buf is a null-terminated
  //  string. To create a stream of size zero, do the following:
  if (size == 0)
    buffer = &nullchar;
  stream_ = new istringstream(std::string(buffer, size));
  set_istream(stream_);
}
 
void InputCommBuffer::clear()
{
  assert(stream_);
#ifndef TRUST_USE_UVM // ToDo bug ?
  delete stream_;
#endif
  stream_ = 0;
  set_istream(stream_);
  size_ = -1;
}