/*@
MPI_File_seek - Updates the individual file pointer
Input Parameters:
. fh - file handle (handle)
. offset - file offset (integer)
. whence - update mode (state)
.N fortran
@*/
int MPI_File_seek(MPI_File fh, MPI_Offset offset, int whence)
{
int error_code;
ADIO_File adio_fh;
static char myname[] = "MPI_FILE_SEEK";
MPI_Offset curr_offset, eof_offset;
#ifdef MPI_hpux
int fl_xmpi;
HPMP_IO_START(fl_xmpi, BLKMPIFILESEEK, TRDTBLOCK, adio_fh, MPI_DATATYPE_NULL, -1);
#endif /* MPI_hpux */
ROMIO_THREAD_CS_ENTER();
adio_fh = MPIO_File_resolve(fh);
/* --BEGIN ERROR HANDLING-- */
MPIO_CHECK_FILE_HANDLE(adio_fh, myname, error_code);
MPIO_CHECK_NOT_SEQUENTIAL_MODE(adio_fh, myname, error_code);
/* --END ERROR HANDLING-- */
switch (whence) {
case MPI_SEEK_SET:
/* --BEGIN ERROR HANDLING-- */
if (offset < 0) {
error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_ARG, "**iobadoffset", 0);
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
}
/* --END ERROR HANDLING-- */
break;
case MPI_SEEK_CUR:
/* find offset corr. to current location of file pointer */
ADIOI_Get_position(adio_fh, &curr_offset);
offset += curr_offset;
/* --BEGIN ERROR HANDLING-- */
if (offset < 0) {
error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_ARG, "**ionegoffset", 0);
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
}
/* --END ERROR HANDLING-- */
break;
case MPI_SEEK_END:
/* we can in many cases do seeks w/o a file actually opened, but not in
* the MPI_SEEK_END case */
ADIOI_TEST_DEFERRED(adio_fh, "MPI_File_seek", &error_code);
/* find offset corr. to end of file */
ADIOI_Get_eof_offset(adio_fh, &eof_offset);
offset += eof_offset;
/* --BEGIN ERROR HANDLING-- */
if (offset < 0) {
error_code = MPIO_Err_create_code(MPI_SUCCESS,
MPIR_ERR_RECOVERABLE, myname,
__LINE__, MPI_ERR_ARG, "**ionegoffset", 0);
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
}
/* --END ERROR HANDLING-- */
break;
default:
/* --BEGIN ERROR HANDLING-- */
error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_ARG, "**iobadwhence", 0);
error_code = MPIO_Err_return_file(adio_fh, error_code);
goto fn_exit;
/* --END ERROR HANDLING-- */
}
ADIO_SeekIndividual(adio_fh, offset, ADIO_SEEK_SET, &error_code);
/* TODO: what do we do with this error? */
/* --BEGIN ERROR HANDLING-- */
if (error_code != MPI_SUCCESS)
error_code = MPIO_Err_return_file(adio_fh, error_code);
/* --END ERROR HANDLING-- */
#ifdef MPI_hpux
HPMP_IO_END(fl_xmpi, adio_fh, MPI_DATATYPE_NULL, -1);
#endif /* MPI_hpux */
error_code = MPI_SUCCESS;
fn_exit:
ROMIO_THREAD_CS_EXIT();
return error_code;
}
/*@
MPI_File_seek - Updates the individual file pointer
Input Parameters:
. fh - file handle (handle)
. offset - file offset (integer)
. whence - update mode (state)
.N fortran
@*/
int MPI_File_seek(MPI_File fh, MPI_Offset offset, int whence)
{
int error_code;
#ifndef PRINT_ERR_MSG
static char myname[] = "MPI_FILE_SEEK";
#endif
MPI_Offset curr_offset, eof_offset;
#ifdef MPI_hpux
int fl_xmpi;
HPMP_IO_START(fl_xmpi, BLKMPIFILESEEK, TRDTBLOCK, fh, MPI_DATATYPE_NULL, -1);
#endif /* MPI_hpux */
#ifdef PRINT_ERR_MSG
if ((fh <= (MPI_File) 0) || (fh->cookie != ADIOI_FILE_COOKIE)) {
FPRINTF(stderr, "MPI_File_seek: Invalid file handle\n");
MPI_Abort(MPI_COMM_WORLD, 1);
}
#else
ADIOI_TEST_FILE_HANDLE(fh, myname);
#endif
if (fh->access_mode & MPI_MODE_SEQUENTIAL) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_seek: Can't use this function because file was opened with MPI_MODE_SEQUENTIAL\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_UNSUPPORTED_OPERATION,
MPIR_ERR_AMODE_SEQ, myname, (char *) 0, (char *) 0);
return ADIOI_Error(fh, error_code, myname);
#endif
}
switch(whence) {
case MPI_SEEK_SET:
if (offset < 0) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_seek: Invalid offset argument\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_OFFSET_ARG,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(fh, error_code, myname);
#endif
}
break;
case MPI_SEEK_CUR:
/* find offset corr. to current location of file pointer */
ADIOI_Get_position(fh, &curr_offset);
offset += curr_offset;
if (offset < 0) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_seek: offset points to a negative location in the file\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_OFFSET_ARG_NEG,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(fh, error_code, myname);
#endif
}
break;
case MPI_SEEK_END:
/* find offset corr. to end of file */
ADIOI_Get_eof_offset(fh, &eof_offset);
offset += eof_offset;
if (offset < 0) {
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_seek: offset points to a negative location in the file\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_OFFSET_ARG_NEG,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(fh, error_code, myname);
#endif
}
break;
default:
#ifdef PRINT_ERR_MSG
FPRINTF(stderr, "MPI_File_seek: Invalid whence argument\n");
MPI_Abort(MPI_COMM_WORLD, 1);
#else
error_code = MPIR_Err_setmsg(MPI_ERR_ARG, MPIR_ERR_WHENCE_ARG,
myname, (char *) 0, (char *) 0);
return ADIOI_Error(fh, error_code, myname);
#endif
}
ADIO_SeekIndividual(fh, offset, ADIO_SEEK_SET, &error_code);
#ifdef MPI_hpux
HPMP_IO_END(fl_xmpi, fh, MPI_DATATYPE_NULL, -1);
#endif /* MPI_hpux */
return error_code;
}