Method enlargeBuffer

src/tscore/TextBuffer.cc:124–151

TextBuffer::enlargeBuffer(int n) Enlarge the buffer so at least at N bytes are free in the buffer. Always enlarges by a power of two. Returns -1 if insufficient memory, zero otherwise

//  Returns -1 if insufficient memory,
//    zero otherwise
int
TextBuffer::enlargeBuffer(unsigned N)
{
  unsigned addedSize = 0;
  unsigned newSize   = (currentSize ? currentSize : 1) * 2;
  char    *newSpace;

  if (spaceLeft < N) {
    while ((newSize - currentSize) < N) {
      newSize *= 2;
    }

    addedSize = newSize - currentSize;

    newSpace = static_cast<char *>(ats_realloc(bufferStart, newSize));
    if (newSpace != nullptr) {
      nextAdd      = newSpace + static_cast<unsigned>(nextAdd - bufferStart);
      bufferStart  = newSpace;
      spaceLeft   += addedSize;
      currentSize  = newSize;
    } else {
      // Out of Memory, Sigh
      return -1;
    }
  }

  return 0;
}

// int TextBuffer::rawReadFromFile
//