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libs/ck-libs/ampi/romio/adio/ad_ntfs/ad_ntfs_open.c

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/* -*- Mode: C; c-basic-offset:4 ; -*- */
/* 
 *
 *
 *   Copyright (C) 1997 University of Chicago. 
 *   See COPYRIGHT notice in top-level directory.
 */

#include "ad_ntfs.h"

void ADIOI_NTFS_Open(ADIO_File fd, int *error_code)
{
    int err;
    int cmode, amode, attrib;
    static char myname[] = "ADIOI_NTFS_Open";

    amode = 0;
    cmode = OPEN_EXISTING;
#ifdef USE_WIN_THREADED_IO
    attrib = FILE_FLAG_OVERLAPPED;
#else
    attrib = FILE_ATTRIBUTE_NORMAL;
#endif

    if (fd->access_mode & ADIO_CREATE)
    {
    cmode = OPEN_ALWAYS;
    }
    if (fd->access_mode & ADIO_EXCL)
    {
    cmode = CREATE_NEW;
    }

    if (fd->access_mode & ADIO_RDONLY)
    {
    amode = GENERIC_READ;
    }
    if (fd->access_mode & ADIO_WRONLY)
    {
    amode = GENERIC_WRITE;
    }
    if (fd->access_mode & ADIO_RDWR)
    {
    amode = GENERIC_READ | GENERIC_WRITE;
    }

    if (fd->access_mode & ADIO_DELETE_ON_CLOSE)
    {
    attrib = attrib | FILE_FLAG_DELETE_ON_CLOSE;
    }
    if (fd->access_mode & ADIO_SEQUENTIAL)
    {
    attrib = attrib | FILE_FLAG_SEQUENTIAL_SCAN;
    }
    else
    {
    attrib = attrib | FILE_FLAG_RANDOM_ACCESS;
    }

    fd->fd_sys = CreateFile(fd->filename, 
    amode,
    FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, 
    NULL, 
    cmode, 
    attrib, 
    NULL);
    fd->fd_direct = -1;

    if ((fd->fd_sys != INVALID_HANDLE_VALUE) && (fd->access_mode & ADIO_APPEND))
    {
    fd->fp_ind = fd->fp_sys_posn = SetFilePointer(fd->fd_sys, 0, NULL, FILE_END);
    if (fd->fp_ind == INVALID_SET_FILE_POINTER)
    {
        char errMsg[ADIOI_NTFS_ERR_MSG_MAX];
        err = GetLastError();
        ADIOI_NTFS_Strerror(err, errMsg, ADIOI_NTFS_ERR_MSG_MAX);
        if (err != NO_ERROR)
        {
        *error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
            myname, __LINE__, MPI_ERR_IO,
            "**io", "**io %s", errMsg);
        return;
        }
    }
    }

    /* --BEGIN ERROR HANDLING-- */
    if (fd->fd_sys == INVALID_HANDLE_VALUE)
    {
    char errMsg[ADIOI_NTFS_ERR_MSG_MAX];
    err = GetLastError();
    ADIOI_NTFS_Strerror(err, errMsg, ADIOI_NTFS_ERR_MSG_MAX);
    *error_code = MPIO_Err_create_code(MPI_SUCCESS, MPIR_ERR_RECOVERABLE,
                       myname, __LINE__, MPI_ERR_IO,
                       "**io",
                       "**io %s", errMsg);
    return;
    }
    /* --END ERROR HANDLING-- */
    *error_code = MPI_SUCCESS;
}

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