sf_close
sf_command
sf_error
sf_error_number
sf_error_str
sf_format_check
sf_get_string
sf_open
sf_open_fd
sf_open_virtual
sf_perror
sf_readf_double
sf_readf_float
sf_readf_int
sf_readf_short
sf_read_double
sf_read_float
sf_read_int
sf_read_raw
sf_read_short
sf_seek
sf_set_string
sf_strerror
sf_writef_double
sf_writef_float
sf_writef_int
sf_writef_short
sf_write_double
sf_write_float
sf_write_int
sf_write_raw
sf_write_short
sf_write_sync