XDF_SEEK(3)						     xdffileio library manual						       XDF_SEEK(3)

NAME

       xdf_seek - move the sample pointer of a xDF file

SYNOPSIS

       #include <xdfio.h>

       off_t xdf_seek(struct xdf* xdf, off_t offset, int whence);

DESCRIPTION

       xdf_seek() repositions the current sample pointer according to the couple (offset,whence) where whence can be:

       SEEK_SET
	      The offset is set to offset bytes.

       SEEK_CUR
	      The offset is set to its current location plus offset bytes.

       SEEK_END
	      The offset is set to the size of the file plus offset bytes.

       The file referenced by xdf should have been opened with mode XDF_READ and xdf_prepare_arrays(3) should have been successfully called on it.

RETURN VALUE

       Upon  successful  completion,  xdf_seek()  returns the resulting offset location as measured in number of samples from the beginning of the
       recording. Otherwise, a value of -1 is returned and errno is set to indicate the error.

ERRORS

       EINVAL xdf is NULL or whence is none of the allowed values.

       EPERM  No successfull call to xdf_prepare_transfer(3) have been done on xdf or it has been opened using the mode XDF_WRITE.

       ERANGE The requested offset is out of the range of the recording.

       EINTR  The call was interrupted by a signal before any data was read; see signal(7).

       EIO    A low-level I/O error occurred while reading from the inode.

       ESTALE Stale file handle. This error can occur for NFS and for other file systems

SEE ALSO

       xdf_define_arrays(3), xdf_prepare_transfer(3)

EPFL
								       2010							       XDF_SEEK(3)