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io/ompio: fix the get_byte_offset code #1750

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Merged
merged 1 commit into from
Jun 3, 2016
Merged

io/ompio: fix the get_byte_offset code #1750

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21 changes: 11 additions & 10 deletions ompi/mca/io/ompio/io_ompio_file_open.c
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Original file line number Diff line number Diff line change
Expand Up @@ -769,35 +769,36 @@ mca_io_ompio_file_get_byte_offset (ompi_file_t *fh,
{
mca_io_ompio_data_t *data;
int i, k, index;
size_t position;
size_t total_bytes;
size_t temp_offset;

data = (mca_io_ompio_data_t *) fh->f_io_selected_data;

temp_offset = data->ompio_fh.f_view_extent *
(offset*data->ompio_fh.f_etype_size / data->ompio_fh.f_view_size);


position = 0;
total_bytes = (offset*data->ompio_fh.f_etype_size) % data->ompio_fh.f_view_size;
i = (offset*data->ompio_fh.f_etype_size) % data->ompio_fh.f_view_size;
index = 0;
i = total_bytes;
k = 0;

while (1) {
k += data->ompio_fh.f_decoded_iov[index].iov_len;
k = data->ompio_fh.f_decoded_iov[index].iov_len;
if (i >= k) {
i = i - data->ompio_fh.f_decoded_iov[index].iov_len;
position += data->ompio_fh.f_decoded_iov[index].iov_len;
index = index+1;
i -= k;
index++;
if ( 0 == i ) {
k=0;
break;
}
}
else {
k=i;
break;
}
}

*disp = data->ompio_fh.f_disp + temp_offset +
(OMPI_MPI_OFFSET_TYPE)(intptr_t)data->ompio_fh.f_decoded_iov[index].iov_base;
(OMPI_MPI_OFFSET_TYPE)(intptr_t)data->ompio_fh.f_decoded_iov[index].iov_base + k;

return OMPI_SUCCESS;
}
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