Home | History | Annotate | Line # | Download | only in hpcboot
file_fat.cpp revision 1.2 
      1 /*	$NetBSD: file_fat.cpp,v 1.2 2001/05/08 18:51:22 uch Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 2001 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 	_debug = TRUE;
     47 	DPRINTF((TEXT("File: FAT\n")));
     48 }
     49 
     50 FatFile::~FatFile(void)
     51 {
     52 }
     53 
     54 BOOL
     55 FatFile::setRoot(TCHAR *drive)
     56 {
     57 	wcsncpy(_drive, drive, MAX_PATH);
     58 	wcsncpy(_filename, drive, MAX_PATH);
     59 
     60 	return TRUE;
     61 }
     62 
     63 BOOL
     64 FatFile::open(const TCHAR *name, u_int32_t flags)
     65 {
     66 	// drive + filename
     67 	wcsncpy(_filename, _drive, MAX_PATH);
     68 	wcscat(_filename, name);
     69 	// open it.
     70 	_handle = CreateFile(_filename, GENERIC_READ | GENERIC_WRITE,
     71 	    0, 0, flags, 0, 0);
     72 	if (_handle == INVALID_HANDLE_VALUE) {
     73 		DPRINTF((TEXT("can't open \"%s\". cause = %d\n"),
     74 		    name, GetLastError()));
     75 		return FALSE;
     76 	}
     77 
     78 	size_t sz = size();
     79 	if (sz == ~0) {
     80 		DPRINTF((TEXT("can't get file size.\n")));
     81 		CloseHandle(_handle);
     82 		return FALSE;
     83 	}
     84 	DPRINTF((TEXT("open file \"%s\"(%d byte).\n"), _filename, sz));
     85 
     86 	return TRUE;
     87 }
     88 
     89 size_t
     90 FatFile::read(void *buf, size_t bytes, off_t ofs)
     91 {
     92 	unsigned long readed;
     93 
     94 	if (ofs != -1)
     95 		SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
     96 	ReadFile(_handle, buf, bytes, &readed, 0);
     97 
     98 	return size_t(readed);
     99 }
    100 
    101 size_t
    102 FatFile::write(const void *buf, size_t bytes, off_t ofs)
    103 {
    104 	unsigned long wrote;
    105 
    106 	if (ofs != -1)
    107 		SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
    108 	WriteFile(_handle, buf, bytes, &wrote, 0);
    109 
    110 	return size_t(wrote);
    111 }
    112 
    113 BOOL
    114 FatFile::seek(off_t ofs)
    115 {
    116 	SetFilePointer(_handle, ofs, 0, FILE_BEGIN);
    117 
    118 	return TRUE;
    119 }
    120