-bool
-SMFSource::removable () const
-{
- return (_flags & Removable) && ((_flags & RemoveAtDestroy) ||
- ((_flags & RemovableIfEmpty) && is_empty()));
-}
-
-int
-SMFSource::init (string pathstr, bool must_exist)
-{
- bool is_new = false;
-
- if (!find (pathstr, must_exist, is_new)) {
- cerr << "cannot find " << pathstr << " with me = " << must_exist << endl;
- return -1;
- }
-
- if (is_new && must_exist) {
- return -1;
- }
-
- assert(_name.find("/") == string::npos);
- return 0;
-}
-
-/** Attempt to open the SMF file for reading and writing.
- *
- * Currently SMFSource is always read/write.
- *
- * \return 0 on success
- * -1 if the file can not be opened for reading,
- * -2 if the file can not be opened for writing
- */
-int
-SMFSource::open()
-{
- //cerr << "Opening SMF file " << path() << " writeable: " << writable() << endl;
-
- assert(writable()); // FIXME;
-
- _fd = fopen(path().c_str(), "r+");
-
- // File already exists
- if (_fd) {
- fseek(_fd, _header_size - 4, 0);
- uint32_t track_size_be = 0;
- fread(&track_size_be, 4, 1, _fd);
- _track_size = GUINT32_FROM_BE(track_size_be);
- _empty = _track_size > 4;
- //cerr << "SMF - read track size " << _track_size << endl;
-
- // We're making a new file
- } else {
- _fd = fopen(path().c_str(), "w+");
- if (_fd == NULL) {
- cerr << "ERROR: Can not open SMF file " << path() << " for writing: " <<
- strerror(errno) << endl;
- return -2;
- }
- _track_size = 4;
- _empty = true;
-
- // Write a tentative header just to pad things out so writing happens in the right spot
- flush_header();
- flush_footer();
- }
-
- return (_fd == 0) ? -1 : 0;
-}
-
-void
-SMFSource::close()
-{
- if (_fd) {
- flush_header();
- flush_footer();
- fclose(_fd);
- _fd = NULL;
- }
-}
-
-void
-SMFSource::seek_to_footer_position()
-{
- uint8_t buffer[4];
-
- // lets check if there is a track end marker at the end of the data
- fseek(_fd, -4, SEEK_END);
- //cerr << "SMFSource::seek_to_footer_position: At position: " << ftell(_fd);
- size_t read_bytes = fread(buffer, sizeof(uint8_t), 4, _fd);
- /*cerr << " read size: " << read_bytes << " buffer: ";
- for (size_t i=0; i < read_bytes; ++i) {
- printf("%x ", buffer[i]);
- }
- printf("\n");
- */
-
- if( (read_bytes == 4) &&
- buffer[0] == 0x00 &&
- buffer[1] == 0xFF &&
- buffer[2] == 0x2F &&
- buffer[3] == 0x00) {
- // there is one, so overwrite it
- fseek(_fd, -4, SEEK_END);
- } else {
- // there is none, so append
- fseek(_fd, 0, SEEK_END);
- }
-}
-