/*      $NetBSD: winfs.c,v 1.5 2009/03/14 21:04:09 dsl Exp $    */

/*-
 * Copyright (c) 1999 Shin Takemura.
 * All rights reserved.
 *
 * This software is part of the PocketBSD.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *      This product includes software developed by the PocketBSD project
 *      and its contributors.
 * 4. Neither the name of the project nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 */
#define STANDALONE_WINDOWS_SIDE
#include <stand.h>
#include <winfs.h>

#define MAXPATHLEN 1024

/*
 *  file system specific context.
 */
struct winfs {
        HANDLE  hDevice;
};


int 
win_open(char *path, struct open_file *f)
{
        TCHAR *wpath = (TCHAR*)path;
        struct winfs *fsdata;

        fsdata = (struct winfs *)alloc(sizeof(*fsdata));
        if (!fsdata) {
                return (ENOMEM);
        }

        win_printf(TEXT("open(%s)\n"), wpath);
        fsdata->hDevice = CreateFile(wpath, GENERIC_READ, 0, NULL,    
                                    OPEN_EXISTING, 0, NULL);
        if (fsdata->hDevice == INVALID_HANDLE_VALUE) {
                win_printf(TEXT("can't open %s.\n"), wpath);
                dealloc(fsdata, sizeof(*fsdata));
                return (EIO);   /* XXX, We shuld check GetLastError(). */
        }

        f->f_fsdata = (void *)fsdata;

        return (0);
}


int 
win_close(struct open_file *f)
{
        struct winfs *fsdata = (struct winfs *) f->f_fsdata;

        if (fsdata->hDevice != INVALID_HANDLE_VALUE) {
                CloseHandle(fsdata->hDevice);
        }
        dealloc(fsdata, sizeof(*fsdata));

        return (0);
}


int 
win_read(struct open_file *f, void *addr, size_t size, size_t *resid)
        /* resid:        out */
{
        struct winfs *fsdata = (struct winfs *) f->f_fsdata;
        DWORD read_len;

        while (size > 0) {
                if (!ReadFile(fsdata->hDevice,
                              (u_char*)addr, size,
                              &read_len, NULL)) {
                        win_printf(TEXT("ReadFile() failed.\n"));
                }
                
                if (read_len == 0)
                        break;  /* EOF */

                (unsigned long)addr += read_len;
                size -= read_len;
        }

        if (resid)
                *resid = size;
        return (0);
}

int 
win_write(struct open_file *f, void *start, size_t size, size_t *resid)
        /* resid:        out */
{
        return (EROFS); /* XXX */
}


int 
win_stat(struct open_file *f, struct stat *sb)
{
        sb->st_mode = 0444;
        sb->st_nlink = 1;
        sb->st_uid = 0;
        sb->st_gid = 0;
        sb->st_size = -1;
        return (0);
}

off_t 
win_seek(struct open_file *f, off_t offset, int whence)
{
        struct winfs *fsdata = (struct winfs *) f->f_fsdata;
        DWORD dwPointer;
        int winwhence;

        switch (whence) {
        case SEEK_SET:
                winwhence = FILE_BEGIN;
                break;
        case SEEK_CUR:
                winwhence = FILE_CURRENT;
                break;
        case SEEK_END:
                winwhence = FILE_END;
                break;
        default:
                errno = EOFFSET;
                return (-1);
        }

        dwPointer = SetFilePointer(fsdata->hDevice, offset, NULL, winwhence);
        if (dwPointer == 0xffffffff) {
                errno = EINVAL; /* XXX, We shuld check GetLastError(). */
                return (-1);
        }

        return (0);
}