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/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
*
* Copyright (C) 1997 University of Chicago.
* See COPYRIGHT notice in top-level directory.
*/
#include "ad_pfs.h"
void ADIOI_PFS_ReadContig(ADIO_File fd, void *buf, int count,
MPI_Datatype datatype, int file_ptr_type,
ADIO_Offset offset, ADIO_Status *status, int *error_code)
{
MPI_Count err=-1, datatype_size, len;
static char myname[] = "ADIOI_PFS_READCONTIG";
MPI_Type_size_x(datatype, &datatype_size);
len = datatype_size * count;
if (file_ptr_type == ADIO_EXPLICIT_OFFSET) {
if (fd->fp_sys_posn != offset) {
lseek(fd->fd_sys, offset, SEEK_SET);
}
err = _cread(fd->fd_sys, buf, len);
fd->fp_sys_posn = offset + err;
/* individual file pointer not updated */
}
else { /* read from curr. location of ind. file pointer */
if (fd->fp_sys_posn != fd->fp_ind) {
lseek(fd->fd_sys, fd->fp_ind, SEEK_SET);
}
err = _cread(fd->fd_sys, buf, len);
fd->fp_ind += err;
fd->fp_sys_posn = fd->fp_ind;
}
#ifdef HAVE_STATUS_SET_BYTES
if (err != -1) MPIR_Status_set_bytes(status, datatype, err);
#endif
if (err == -1) {
*error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
myname, __LINE__, MPI_ERR_IO,
"**io",
"**io %s", strerror(errno));
}
else *error_code = MPI_SUCCESS;
}
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