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#include "rosbag/stream.h"
#include "rosbag/chunked_file.h"

#include <ros/ros.h>

using boost::shared_ptr;

namespace rosbag {

// StreamFactory

StreamFactory::StreamFactory(ChunkedFile* file) :
    uncompressed_stream_(new UncompressedStream(file)),
    bz2_stream_         (new BZ2Stream(file))
{
}

shared_ptr<Stream> StreamFactory::getStream(CompressionType type) const {
    switch (type) {
        case compression::None: return uncompressed_stream_;
        case compression::BZ2:  return bz2_stream_;
        default:                return shared_ptr<Stream>();
    }
}

// Stream

Stream::Stream(ChunkedFile* file) : file_(file) { }

Stream::~Stream() { }

void Stream::startWrite() { }
void Stream::stopWrite()  { }
void Stream::startRead()  { }
void Stream::stopRead()   { }

FILE*    Stream::getFilePointer()                 { return file_->file_;            }
uint64_t Stream::getCompressedIn()                { return file_->compressed_in_;   }
void     Stream::setCompressedIn(uint64_t nbytes) { file_->compressed_in_ = nbytes; }
void     Stream::advanceOffset(uint64_t nbytes)   { file_->offset_ += nbytes;       }
char*    Stream::getUnused()                      { return file_->unused_;          }
int      Stream::getUnusedLength()                { return file_->nUnused_;         }
void     Stream::setUnused(char* unused)          { file_->unused_ = unused;        }
void     Stream::setUnusedLength(int nUnused)     { file_->nUnused_ = nUnused;      }
void     Stream::clearUnused()                    { file_->clearUnused();           }

} // namespace rosbag
