sys/arch/hpc/stand/hpcboot/file_fat.cpp

   1 /*      $NetBSD: file_fat.cpp,v 1.4 2006/03/05 04:05:39 uwe Exp $       */
   2
   3 /*-
   4  * Copyright (c) 2001, 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by UCHIYAMA Yasushi.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <file.h>
  33 #include <file_fat.h>
  34 #include <console.h>
  35
  36 FatFile::FatFile(Console *&cons)
  37         : File(cons)
  38 {
  39
  40         _debug = TRUE;
  41         DPRINTF((TEXT("FileManager: FAT\n")));
  42 }
  43
  44 FatFile::~FatFile(void)
  45 {
  46
  47 }
  48
  49 BOOL
  50 FatFile::setRoot(TCHAR *drive)
  51 {
  52
  53         wcsncpy(_drive, drive, MAX_PATH);
  54         wcsncpy(_filename, drive, MAX_PATH);
  55
  56         return TRUE;
  57 }
  58
  59 BOOL
  60 FatFile::open(const TCHAR *name, uint32_t flags)
  61 {
  62         // drive + filename
  63         wsprintf(_filename, TEXT("%s%s"), _drive, name);
  64
  65         // open it.
  66         _handle = CreateFile(_filename, GENERIC_READ, 0, 0,
  67             OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  68         if (_handle == INVALID_HANDLE_VALUE) {
  69                 DPRINTF((TEXT("can't open \"%s\". cause = %d\n"),
  70                     _filename, GetLastError()));
  71                 return FALSE;
  72         }
  73
  74         size_t sz = size();
  75         if (sz == ~0) {
  76                 DPRINTF((TEXT("can't get file size.\n")));
  77                 CloseHandle(_handle);
  78                 return FALSE;
  79         }
  80         DPRINTF((TEXT("open file \"%s\"(%d byte).\n"), _filename, sz));
  81
  82         return TRUE;
  83 }
  84
  85 size_t
  86 FatFile::read(void *buf, size_t bytes, off_t ofs)
  87 {
  88         unsigned long readed;
  89
  90         if (ofs != -1)
  91                 SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
  92         ReadFile(_handle, buf, bytes, &readed, 0);
  93
  94         return size_t(readed);
  95 }
  96
  97 size_t
  98 FatFile::write(const void *buf, size_t bytes, off_t ofs)
  99 {
 100         unsigned long wrote;
 101
 102         if (ofs != -1)
 103                 SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
 104         WriteFile(_handle, buf, bytes, &wrote, 0);
 105
 106         return size_t(wrote);
 107 }
 108
 109 BOOL
 110 FatFile::seek(off_t ofs)
 111 {
 112
 113         SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
 114
 115         return TRUE;
 116 }