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file_fat.cpp revision 1.4.72.1 
      1 /*	$NetBSD: file_fat.cpp,v 1.4.72.1 2008/05/16 02:22:24 yamt 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 }
    117