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file_fat.cpp revision 1.4 
      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  * 3. All advertising materials mentioning features or use of this software
     19  *    must display the following acknowledgement:
     20  *        This product includes software developed by the NetBSD
     21  *        Foundation, Inc. and its contributors.
     22  * 4. Neither the name of The NetBSD Foundation nor the names of its
     23  *    contributors may be used to endorse or promote products derived
     24  *    from this software without specific prior written permission.
     25  *
     26  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     27  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     28  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     29  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     30  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     31  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     32  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     33  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     34  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     35  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     36  * POSSIBILITY OF SUCH DAMAGE.
     37  */
     38 
     39 #include <file.h>
     40 #include <file_fat.h>
     41 #include <console.h>
     42 
     43 FatFile::FatFile(Console *&cons)
     44 	: File(cons)
     45 {
     46 
     47 	_debug = TRUE;
     48 	DPRINTF((TEXT("FileManager: FAT\n")));
     49 }
     50 
     51 FatFile::~FatFile(void)
     52 {
     53 
     54 }
     55 
     56 BOOL
     57 FatFile::setRoot(TCHAR *drive)
     58 {
     59 
     60 	wcsncpy(_drive, drive, MAX_PATH);
     61 	wcsncpy(_filename, drive, MAX_PATH);
     62 
     63 	return TRUE;
     64 }
     65 
     66 BOOL
     67 FatFile::open(const TCHAR *name, uint32_t flags)
     68 {
     69 	// drive + filename
     70 	wsprintf(_filename, TEXT("%s%s"), _drive, name);
     71 
     72 	// open it.
     73 	_handle = CreateFile(_filename, GENERIC_READ, 0, 0,
     74 	    OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
     75 	if (_handle == INVALID_HANDLE_VALUE) {
     76 		DPRINTF((TEXT("can't open \"%s\". cause = %d\n"),
     77 		    _filename, GetLastError()));
     78 		return FALSE;
     79 	}
     80 
     81 	size_t sz = size();
     82 	if (sz == ~0) {
     83 		DPRINTF((TEXT("can't get file size.\n")));
     84 		CloseHandle(_handle);
     85 		return FALSE;
     86 	}
     87 	DPRINTF((TEXT("open file \"%s\"(%d byte).\n"), _filename, sz));
     88 
     89 	return TRUE;
     90 }
     91 
     92 size_t
     93 FatFile::read(void *buf, size_t bytes, off_t ofs)
     94 {
     95 	unsigned long readed;
     96 
     97 	if (ofs != -1)
     98 		SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
     99 	ReadFile(_handle, buf, bytes, &readed, 0);
    100 
    101 	return size_t(readed);
    102 }
    103 
    104 size_t
    105 FatFile::write(const void *buf, size_t bytes, off_t ofs)
    106 {
    107 	unsigned long wrote;
    108 
    109 	if (ofs != -1)
    110 		SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
    111 	WriteFile(_handle, buf, bytes, &wrote, 0);
    112 
    113 	return size_t(wrote);
    114 }
    115 
    116 BOOL
    117 FatFile::seek(off_t ofs)
    118 {
    119 
    120 	SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
    121 
    122 	return TRUE;
    123 }
    124