/* -*- Mode: C; c-basic-offset:4 ; indent-tabs-mode:nil ; -*- */
/*
 *
 *   Copyright (C) 2004 University of Chicago.
 *   See COPYRIGHT notice in top-level directory.
 */

#include "adio.h"
#include "mpiu_greq.h"

/* Generic implementation of IreadContig calls the blocking ReadContig
 * immediately.
 */
void ADIOI_FAKE_IreadContig(ADIO_File fd, void *buf, int count,
                            MPI_Datatype datatype, int file_ptr_type,
                            ADIO_Offset offset, ADIO_Request * request, int *error_code)
{
    ADIO_Status status;
    MPI_Count typesize;
    MPI_Offset len;
    int actual_len=0;


    MPI_Type_size_x(datatype, &typesize);
    len = (MPI_Offset) count *(MPI_Offset) typesize;

    /* Call the blocking function.  It will create an error code
     * if necessary.
     */
    ADIOI_Assert(len == (int) len);     /* the count is an int parm */
    ADIO_ReadContig(fd, buf, (int) len, MPI_BYTE, file_ptr_type, offset, &status, error_code);
    if (*error_code != MPI_SUCCESS) {
        len = 0;
    } else {
        MPI_Get_count(&status, MPI_BYTE, &actual_len);
    }
    MPIO_Completed_request_create(&fd, actual_len, error_code, request);
}


/* Generic implementation of IreadStrided calls the blocking ReadStrided
 * immediately.
 */
void ADIOI_FAKE_IreadStrided(ADIO_File fd, void *buf, int count,
                             MPI_Datatype datatype, int file_ptr_type,
                             ADIO_Offset offset, ADIO_Request * request, int *error_code)
{
    ADIO_Status status;
    MPI_Count typesize;
    MPI_Offset nbytes = 0;

    /* Call the blocking function.  It will create an error code
     * if necessary.
     */
    ADIO_ReadStrided(fd, buf, count, datatype, file_ptr_type, offset, &status, error_code);
    if (*error_code == MPI_SUCCESS) {
        MPI_Type_size_x(datatype, &typesize);
        nbytes = (MPI_Offset) count *(MPI_Offset) typesize;
    }
    MPIO_Completed_request_create(&fd, nbytes, error_code, request);
}
