/*
 * Copyright (C) by Argonne National Laboratory
 *     See COPYRIGHT in top-level directory
 */

#include "adio.h"
#include <assert.h>
#include "adio_extern.h"
#include "ad_pvfs2.h"
#include "ad_pvfs2_io.h"
#include "ad_pvfs2_common.h"

int ADIOI_PVFS2_StridedDtypeIO(ADIO_File fd, void *buf, MPI_Aint count,
                               MPI_Datatype datatype, int file_ptr_type,
                               ADIO_Offset offset, ADIO_Status * status, int
                               *error_code, int rw_type)
{
    int ret = -1, filetype_is_contig = -1;
    MPI_Count filetype_size = -1;
    int num_filetypes = 0, cur_flat_file_reg_off = 0;
    PVFS_Request tmp_mem_req, mem_req, tmp_file_req, file_req;
    PVFS_sysresp_io resp_io;
    ADIO_Offset off = -1, bytes_into_filetype = 0;
    MPI_Aint lb, filetype_extent = -1;
    int i = -1;
    MPI_Count etype_size;
    PVFS_size pvfs_disp = -1;
    ADIOI_Flatlist_node *flat_file_p;

    /* Use for offsetting the PVFS2 filetype */
    int pvfs_blk = 1;
    ADIOI_PVFS2_fs *pvfs_fs;
    static char myname[] = "ADIOI_PVFS2_STRIDED_DTYPE";

    memset(&tmp_mem_req, 0, sizeof(PVFS_Request));
    memset(&mem_req, 0, sizeof(PVFS_Request));
    memset(&tmp_file_req, 0, sizeof(PVFS_Request));
    memset(&file_req, 0, sizeof(PVFS_Request));

    pvfs_fs = (ADIOI_PVFS2_fs *) fd->fs_ptr;

    ADIOI_Datatype_iscontig(fd->filetype, &filetype_is_contig);

    /* changed below if error */
    *error_code = MPI_SUCCESS;

    /* datatype is the memory type
     * fd->filetype is the file type */
    MPI_Type_size_x(fd->filetype, &filetype_size);
    if (filetype_size == 0) {
        *error_code = MPI_SUCCESS;
        return -1;
    }
    MPI_Type_get_extent(fd->filetype, &lb, &filetype_extent);
    MPI_Type_size_x(fd->etype, &etype_size);
    if (filetype_size == 0) {
        *error_code = MPI_SUCCESS;
        return -1;
    }

    /* offset is in units of etype relative to the filetype.  We
     * convert this to off in terms of actual data bytes (the offset
     * minus the number of bytes that are not used).  We are allowed
     * to do this since PVFS2 handles offsets with respect to a
     * file_req in bytes, otherwise we would have to convert into a
     * pure byte offset as is done in other methods.  Explicit offset
     * case is handled by using fd->disp and byte-converted off. */

    pvfs_disp = fd->disp;
    if (file_ptr_type == ADIO_INDIVIDUAL) {
        if (filetype_is_contig) {
            off = fd->fp_ind - fd->disp;
        } else {
            int flag = 0;
            flat_file_p = ADIOI_Flatten_and_find(fd->filetype);
            num_filetypes = -1;
            while (!flag) {
                num_filetypes++;
                for (i = 0; i < flat_file_p->count; i++) {
                    /* Start on a non zero-length region */
                    if (flat_file_p->blocklens[i]) {
                        if (fd->disp + flat_file_p->indices[i] +
                            (num_filetypes * filetype_extent) +
                            flat_file_p->blocklens[i] > fd->fp_ind &&
                            fd->disp + flat_file_p->indices[i] <= fd->fp_ind) {
                            cur_flat_file_reg_off = fd->fp_ind -
                                (fd->disp + flat_file_p->indices[i] +
                                 (num_filetypes * filetype_extent));
                            flag = 1;
                            break;
                        } else
                            bytes_into_filetype += flat_file_p->blocklens[i];
                    }
                }
            }
            /* Impossible that we don't find it in this datatype */
            assert(i != flat_file_p->count);
            off = bytes_into_filetype + cur_flat_file_reg_off;
        }
    } else {    /* ADIO_EXPLICIT */

        off = etype_size * offset;
    }

#ifdef DEBUG_DTYPE
    fprintf(stderr, "ADIOI_PVFS2_StridedDtypeIO: (fd->fp_ind=%Ld,fd->disp=%Ld,"
            " offset=%Ld),(pvfs_disp=%Ld,off=%Ld)\n", fd->fp_ind, fd->disp, offset, pvfs_disp, off);
#endif


    /* Convert the MPI memory and file datatypes into
     * PVFS2 datatypes */
    ret = convert_mpi_pvfs2_dtype(&datatype, &tmp_mem_req);
    if (ret < 0) {
        goto error_state;
    }
    ret = convert_mpi_pvfs2_dtype(&(fd->filetype), &tmp_file_req);
    if (ret < 0) {
        goto error_state;
    }

    ret = PVFS_Request_contiguous(count, tmp_mem_req, &mem_req);
    if (ret != 0)       /* TODO: convert this to MPIO error handling */
        fprintf(stderr, "ADIOI_PVFS2_stridedDtypeIO: error in final" " CONTIG memory type\n");
    PVFS_Request_free(&tmp_mem_req);

    /* pvfs_disp is used to offset the filetype */
    ret = PVFS_Request_hindexed(1, &pvfs_blk, &pvfs_disp, tmp_file_req, &file_req);
    if (ret != 0)
        fprintf(stderr, "ADIOI_PVFS2_StridedDtypeIO: error in final" " HINDEXED file type\n");
    PVFS_Request_free(&tmp_file_req);

    if (rw_type == READ)
        ret = PVFS_sys_read(pvfs_fs->object_ref, file_req, off, buf,
                            mem_req, &(pvfs_fs->credentials), &resp_io);
    else
        ret = PVFS_sys_write(pvfs_fs->object_ref, file_req, off, buf,
                             mem_req, &(pvfs_fs->credentials), &resp_io);

    if (ret != 0) {
        fprintf(stderr, "ADIOI_PVFS2_StridedDtypeIO: Warning - PVFS_sys_"
                "read/write returned %d and completed %Ld bytes.\n",
                ret, (long long) resp_io.total_completed);
        *error_code = MPIO_Err_create_code(MPI_SUCCESS,
                                           MPIR_ERR_RECOVERABLE,
                                           myname, __LINE__,
                                           ADIOI_PVFS2_error_convert(ret),
                                           "Error in PVFS_sys_io \n", 0);
        goto error_state;
    }

    if (file_ptr_type == ADIO_INDIVIDUAL) {
        fd->fp_ind = off += resp_io.total_completed;
    }

  error_state:
    fd->fp_sys_posn = -1;       /* set it to null. */

    PVFS_Request_free(&mem_req);
    PVFS_Request_free(&file_req);

#ifdef DEBUG_DTYPE
    fprintf(stderr, "ADIOI_PVFS2_StridedDtypeIO: "
            "resp_io.total_completed=%Ld,ret=%d\n", resp_io.total_completed, ret);
#endif

#ifdef HAVE_STATUS_SET_BYTES
    MPIR_Status_set_bytes(status, datatype, resp_io.total_completed);
    /* This is a temporary way of filling in status. The right way is to
     * keep track of how much data was actually accessed by
     * ADIOI_BUFFERED operations */
#endif
    return ret;
}

/* convert_mpi_pvfs2_dtype - Convert a MPI datatype into
 * a PVFS2 datatype so that we can natively use the PVFS2
 * datatypes in the PVFS2 I/O calls instead of converting
 * all datatypes to the hindexed method
 * return 1  - a leaf node
 * return 0  - normal return
 * return -1 - problems */

int convert_mpi_pvfs2_dtype(MPI_Datatype * mpi_dtype, PVFS_Request * pvfs_dtype)
{
    int num_int = -1, num_addr = -1, num_dtype = -1, combiner = -1, i = -1, ret = -1, leaf = -1;
    int *arr_int = NULL;
    MPI_Aint *arr_addr = NULL;
    MPI_Datatype *arr_dtype = NULL;
    PVFS_Request *old_pvfs_dtype = NULL;
    PVFS_Request *old_pvfs_dtype_arr = NULL;
    int arr_count = -1;
    PVFS_size *pvfs_arr_disp = NULL;
    int *pvfs_arr_len = NULL;

    MPI_Type_get_envelope(*mpi_dtype, &num_int, &num_addr, &num_dtype, &combiner);

    /* Depending on type of datatype do the following
     * operations */

    if (combiner == MPI_COMBINER_NAMED) {
        convert_named(mpi_dtype, pvfs_dtype, combiner);
        return 1;
    }

    /* Allocate space for the arrays necessary for
     * MPI_Type_get_contents */

    if ((arr_int = ADIOI_Malloc(sizeof(int) * num_int)) == NULL) {
        fprintf(stderr, "Failed to allocate array_int\n");
        return -1;
    }
    if ((arr_addr = ADIOI_Malloc(sizeof(int) * num_addr)) == NULL) {
        ADIOI_Free(arr_int);
        fprintf(stderr, "Failed to allocate array_addr\n");
        return -1;
    }
    if ((arr_dtype = ADIOI_Malloc(sizeof(MPI_Datatype) * num_dtype)) == NULL) {
        ADIOI_Free(arr_int);
        ADIOI_Free(arr_addr);
        fprintf(stderr, "Failed to allocate array_dtypes\n");
        return -1;
    }

    MPI_Type_get_contents(*mpi_dtype, num_int, num_addr, num_dtype, arr_int, arr_addr, arr_dtype);

    /* If it's not a predefined datatype, it is either a
     * derived datatype or a structured datatype */

    if (combiner != MPI_COMBINER_STRUCT) {
        if ((old_pvfs_dtype = ADIOI_Malloc(sizeof(PVFS_Request))) == NULL)
            fprintf(stderr, "convert_mpi_pvfs2_dtype: " "Failed to allocate PVFS_Request\n");
        switch (combiner) {
            case MPI_COMBINER_CONTIGUOUS:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                ret = PVFS_Request_contiguous(arr_int[0], *old_pvfs_dtype, pvfs_dtype);
                break;
            case MPI_COMBINER_VECTOR:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                ret = PVFS_Request_vector(arr_int[0], arr_int[1],
                                          arr_int[2], *old_pvfs_dtype, pvfs_dtype);
                break;
            case MPI_COMBINER_HVECTOR:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                ret = PVFS_Request_hvector(arr_int[0], arr_int[1],
                                           arr_addr[0], *old_pvfs_dtype, pvfs_dtype);
                break;
                /* Both INDEXED and HINDEXED types require PVFS_size
                 * address arrays.  Therefore, we need to copy and
                 * convert the data from MPI_get_contents() into
                 * a PVFS_size buffer */
            case MPI_COMBINER_INDEXED:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                if ((pvfs_arr_disp = ADIOI_Malloc(arr_int[0] * sizeof(PVFS_size))) == 0) {
                    fprintf(stderr, "convert_mpi_pvfs2_dtype: "
                            "Failed to allocate pvfs_arr_disp\n");
                }
                for (i = 0; i < arr_int[0]; i++) {
                    pvfs_arr_disp[i] = (PVFS_size) arr_int[arr_int[0] + 1 + i];
                }
                ret = PVFS_Request_indexed(arr_int[0], &arr_int[1],
                                           pvfs_arr_disp, *old_pvfs_dtype, pvfs_dtype);
                ADIOI_Free(pvfs_arr_disp);
                break;
            case MPI_COMBINER_HINDEXED:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                if ((pvfs_arr_disp = ADIOI_Malloc(arr_int[0] * sizeof(PVFS_size))) == 0) {
                    fprintf(stderr, "convert_mpi_pvfs2_dtype: "
                            "Failed to allocate pvfs_arr_disp\n");
                }
                for (i = 0; i < arr_int[0]; i++) {
                    pvfs_arr_disp[i] = (PVFS_size) arr_addr[i];
                }
                ret = PVFS_Request_hindexed(arr_int[0], &arr_int[1],
                                            (int64_t *) & arr_addr[0], *old_pvfs_dtype, pvfs_dtype);
                ADIOI_Free(pvfs_arr_disp);
                break;
#ifdef MPIIMPL_HAVE_MPI_COMBINER_DUP
            case MPI_COMBINER_DUP:
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[0], old_pvfs_dtype);
                ret = PVFS_Request_contiguous(1, *old_pvfs_dtype, pvfs_dtype);
                break;
#endif
            case MPI_COMBINER_INDEXED_BLOCK:
                /* No native PVFS2 support for this operation currently */
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "INDEXED_BLOCK is unsupported\n");
                break;
#if defined HAVE_DECL_MPI_COMBINER_HINDEXED_BLOCK && HAVE_DECL_MPI_COMBINER_HINDEXED_BLOCK
            case MPI_COMBINER_HINDEXED_BLOCK:
                /* No native PVFS2 support for this operation currently */
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "HINDEXED_BLOCK is unsupported\n");
                break;
#endif
            case MPI_COMBINER_HINDEXED_INTEGER:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "HINDEXED_INTEGER is unsupported\n");
                break;
            case MPI_COMBINER_STRUCT_INTEGER:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "STRUCT_INTEGER is unsupported\n");
                break;
            case MPI_COMBINER_SUBARRAY:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "SUBARRAY is unsupported\n");
                break;
            case MPI_COMBINER_DARRAY:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "DARRAY is unsupported\n");
                break;
            case MPI_COMBINER_F90_REAL:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "F90_REAL is unsupported\n");
                break;
            case MPI_COMBINER_F90_COMPLEX:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "F90_COMPLEX is unsupported\n");
                break;
            case MPI_COMBINER_F90_INTEGER:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "F90_INTEGER is unsupported\n");
                break;
            case MPI_COMBINER_RESIZED:
                ADIOI_Free(old_pvfs_dtype);
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "RESIZED is unsupported\n");
                break;
            default:
                break;
        }

        if (ret != 0)
            fprintf(stderr, "Error in PVFS_Request_* " "for a derived datatype\n");

#ifdef DEBUG_DTYPE
        print_dtype_info(combiner, num_int, num_addr, num_dtype, arr_int, arr_addr, arr_dtype);
#endif

        if (leaf != 1)
#ifdef MPIIMPL_HAVE_MPI_COMBINER_DUP
            if (combiner != MPI_COMBINER_DUP)
#endif
                MPI_Type_free(&arr_dtype[0]);

        ADIOI_Free(arr_int);
        ADIOI_Free(arr_addr);
        ADIOI_Free(arr_dtype);

        PVFS_Request_free(old_pvfs_dtype);
        ADIOI_Free(old_pvfs_dtype);

        return ret;
    } else {    /* MPI_COMBINER_STRUCT */

        MPI_Aint mpi_lb = -1, mpi_extent = -1;
        PVFS_offset pvfs_lb = -1;
        PVFS_size pvfs_extent = -1;
        int has_lb_ub = 0;

        /* When converting into a PVFS_Request_struct, we no longer
         * can use MPI_LB and MPI_UB.  Therefore, we have to do the
         * following.
         * We simply ignore all the MPI_LB and MPI_UB types and
         * get the lb and extent and pass it on through a
         * PVFS resized_req */

        arr_count = 0;
        for (i = 0; i < arr_int[0]; i++) {
            if (arr_dtype[i] != MPI_LB && arr_dtype[i] != MPI_UB) {
                arr_count++;
            }
        }

        if (arr_int[0] != arr_count) {
            MPI_Type_get_extent(*mpi_dtype, &mpi_lb, &mpi_extent);
            pvfs_lb = mpi_lb;
            pvfs_extent = mpi_extent;
            if ((pvfs_arr_len = ADIOI_Malloc(arr_count * sizeof(int)))
                == NULL) {
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "Failed to allocate pvfs_arr_len\n");
            }
            has_lb_ub = 1;
        }

        if ((old_pvfs_dtype_arr = ADIOI_Malloc(arr_count * sizeof(PVFS_Request))) == NULL)
            fprintf(stderr, "convert_mpi_pvfs2_dtype: " "Failed to allocate PVFS_Requests\n");

        if ((pvfs_arr_disp = ADIOI_Malloc(arr_count * sizeof(PVFS_size)))
            == NULL) {
            fprintf(stderr, "convert_mpi_pvfs2_dtype: " "Failed to allocate pvfs_arr_disp\n");
        }

        arr_count = 0;
        for (i = 0; i < arr_int[0]; i++) {
            if (arr_dtype[i] != MPI_LB && arr_dtype[i] != MPI_UB) {
                leaf = convert_mpi_pvfs2_dtype(&arr_dtype[i], &old_pvfs_dtype_arr[arr_count]);
                if (leaf != 1)
                    MPI_Type_free(&arr_dtype[i]);
                pvfs_arr_disp[arr_count] = (PVFS_size) arr_addr[i];
                if (has_lb_ub) {
                    pvfs_arr_len[arr_count] = arr_int[i + 1];
                }
                arr_count++;
            }
        }

        /* If a MPI_UB or MPI_LB did exist, we have to
         * resize the datatype */
        if (has_lb_ub) {
            PVFS_Request *tmp_pvfs_dtype = NULL;
            if ((tmp_pvfs_dtype = ADIOI_Malloc(sizeof(PVFS_Request))) == NULL)
                fprintf(stderr, "convert_mpi_pvfs2_dtype: " "Failed to allocate PVFS_Request\n");

            ret = PVFS_Request_struct(arr_count, pvfs_arr_len,
                                      pvfs_arr_disp, old_pvfs_dtype_arr, tmp_pvfs_dtype);
            if (ret != 0)
                fprintf(stderr, "Error in PVFS_Request_struct\n");

            arr_count = 0;
            for (i = 0; i < arr_int[0]; i++) {
                if (arr_dtype[i] != MPI_LB && arr_dtype[i] != MPI_UB) {
                    PVFS_Request_free(&old_pvfs_dtype_arr[arr_count]);
                    arr_count++;
                }
            }

#ifdef DEBUG_DTYPE
            fprintf(stderr, "STRUCT(WITHOUT %d LB or UB)(%d,[", arr_int[0] - arr_count, arr_count);
            for (i = 0; i < arr_count; i++)
                fprintf(stderr, "(%d,%Ld) ", pvfs_arr_len[i], pvfs_arr_disp[i]);
            fprintf(stderr, "]\n");
            fprintf(stderr, "RESIZED(LB = %Ld, EXTENT = %Ld)\n", pvfs_lb, pvfs_extent);
#endif
            ret = PVFS_Request_resized(*tmp_pvfs_dtype, pvfs_lb, pvfs_extent, pvfs_dtype);
            if (ret != 0)
                fprintf(stderr, "Error in PVFS_Request_resize\n");

            PVFS_Request_free(tmp_pvfs_dtype);
            ADIOI_Free(tmp_pvfs_dtype);
        } else {        /* No MPI_LB or MPI_UB datatypes */

            ret = PVFS_Request_struct(arr_int[0], &arr_int[1],
                                      pvfs_arr_disp, old_pvfs_dtype_arr, pvfs_dtype);
            if (ret != 0)
                fprintf(stderr, "Error in PVFS_Request_struct\n");

            for (i = 0; i < arr_int[0]; i++) {
                if (arr_dtype[i] != MPI_LB && arr_dtype[i] != MPI_UB)
                    PVFS_Request_free(&old_pvfs_dtype_arr[i]);
            }

#ifdef DEBUG_DTYPE
            print_dtype_info(combiner, num_int, num_addr, num_dtype, arr_int, arr_addr, arr_dtype);
#endif
        }

        ADIOI_Free(arr_int);
        ADIOI_Free(arr_addr);
        ADIOI_Free(arr_dtype);

        ADIOI_Free(old_pvfs_dtype_arr);
        ADIOI_Free(pvfs_arr_disp);
        ADIOI_Free(pvfs_arr_len);

        return ret;
    }

    /* Shouldn't have gotten here */
    fprintf(stderr, "convert_mpi_pvfs2_dtype:  SERIOUS ERROR\n");
    return -1;
}

int convert_named(MPI_Datatype * mpi_dtype, PVFS_Request * pvfs_dtype, int combiner)
{
    int ret = -1;
#ifdef DEBUG_DTYPE
    fprintf(stderr, "NAMED");
#endif

    if (MPI_CHAR == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_CHAR, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_CHAR\n");
#endif
    } else if (MPI_BYTE == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_BYTE, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_BYTE\n");
#endif
    } else if (MPI_SHORT == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_SHORT, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_SHORT\n");
#endif
    } else if (MPI_INT == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_INT, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_INT\n");
#endif
    } else if (MPI_LONG == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_LONG, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_LONG\n");
#endif
    } else if (MPI_FLOAT == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_FLOAT, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_FLOAT\n");
#endif
    } else if (MPI_DOUBLE == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_DOUBLE, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_DOUBLE\n");
#endif
    } else if (MPI_UNSIGNED_CHAR == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_UNSIGNED_CHAR, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_UNSIGNED_CHAR\n");
#endif
    } else if (MPI_UNSIGNED_SHORT == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_UNSIGNED, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_UNSIGNED_SHORT\n");
#endif
    } else if (MPI_UNSIGNED == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_UNSIGNED, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_SHORT\n");
#endif
    } else if (MPI_UNSIGNED_LONG == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_UNSIGNED_LONG, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_UNSIGNED_LONG\n");
#endif
    } else if (MPI_LONG_DOUBLE == *mpi_dtype) {
        ret = PVFS_Request_contiguous(1, PVFS_LONG_DOUBLE, pvfs_dtype);
#ifdef DEBUG_DTYPE
        fprintf(stderr, "-MPI_LONG_DOUBLE\n");
#endif
    } else {
        fprintf(stderr, "convert_named: predefined type not found");
        return -1;
    }
    if (ret != 0)
        fprintf(stderr, "convert_named: Datatype creation failed\n");
    return ret;
}

void print_dtype_info(int combiner,
                      int num_int,
                      int num_addr,
                      int num_dtype, int *arr_int, MPI_Aint * arr_addr, MPI_Datatype * arr_dtype)
{
    int i = -1;
    switch (combiner) {
        case MPI_COMBINER_CONTIGUOUS:
            fprintf(stderr, "CONTIG(%d)\n", arr_int[0]);
            break;
        case MPI_COMBINER_VECTOR:
            fprintf(stderr, "VECTOR(%d,%d,%d)\n", arr_int[0], arr_int[1], arr_int[2]);
            break;
        case MPI_COMBINER_HVECTOR:
            fprintf(stderr, "HVECTOR(%d,%d,%ld)\n", arr_int[0], arr_int[1], arr_addr[0]);
            break;
        case MPI_COMBINER_INDEXED:
            fprintf(stderr, "INDEXED(%d,[", arr_int[0]);
            for (i = 0; i < arr_int[0]; i++)
                fprintf(stderr, "(%d,%d) ", arr_int[1 + i], arr_int[arr_int[0] + 1 + i]);
            fprintf(stderr, "]\n");
            break;
        case MPI_COMBINER_HINDEXED:
            fprintf(stderr, "HINDEXED(%d,[", arr_int[0]);
            for (i = 0; i < arr_int[0]; i++)
                fprintf(stderr, "(%d,%lld) ", arr_int[1 + i], (long long) arr_addr[i]);
            fprintf(stderr, "]\n");
            break;
        case MPI_COMBINER_STRUCT:
            fprintf(stderr, "STRUCT(%d,[", arr_int[0]);
            for (i = 0; i < arr_int[0]; i++)
                fprintf(stderr, "(%d,%lld) ", arr_int[1 + i], (long long) arr_addr[i]);
            fprintf(stderr, "]\n");
            break;
#ifdef MPIIMPL_HAVE_MPI_COMBINER_DUP
        case MPI_COMBINER_DUP:
            fprintf(stderr, "DUP\n");
            break;
#endif
        default:
            fprintf(stderr, "no available information on this datatype");
    }
}
