mirror of
https://github.com/MiSTer-devel/Tandy1000_MiSTer.git
synced 2026-04-19 03:05:39 +00:00
141 lines
3.2 KiB
C++
141 lines
3.2 KiB
C++
//======================================================================
|
|
//
|
|
// Project: XTIDE Universal BIOS, Serial Port Server
|
|
//
|
|
// File: Win32File.h - Microsoft Windows file system access.
|
|
//
|
|
// Routines for accessing the file system under Win32. It's important
|
|
// to use these direct Win32 calls for large files, since FILE * routines,
|
|
// in particular ftell() and fseek(), are limited to signed 32-bits (2 GB).
|
|
// These are also likely faster since they are more direct.
|
|
//
|
|
|
|
//
|
|
// XTIDE Universal BIOS and Associated Tools
|
|
// Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
|
|
//
|
|
// This program is free software; you can redistribute it and/or modify
|
|
// it under the terms of the GNU General Public License as published by
|
|
// the Free Software Foundation; either version 2 of the License, or
|
|
// (at your option) any later version.
|
|
//
|
|
// This program is distributed in the hope that it will be useful,
|
|
// but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
// GNU General Public License for more details.
|
|
// Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
|
|
//
|
|
|
|
#include <stdio.h>
|
|
#include <errno.h>
|
|
#include <sys/stat.h>
|
|
#include <fcntl.h>
|
|
#include "../library/Library.h"
|
|
|
|
class FileAccess
|
|
{
|
|
public:
|
|
int Create( char *p_name )
|
|
{
|
|
fp = open(p_name, O_CREAT | O_EXCL | O_RDWR, 0666);
|
|
|
|
if( fp < 0 )
|
|
{
|
|
if( errno == EEXIST )
|
|
{
|
|
log( 0, "'%s', file already exists", p_name );
|
|
return( 0 );
|
|
}
|
|
else
|
|
log( -1, "'%s', could not create file", p_name );
|
|
}
|
|
|
|
name = p_name;
|
|
|
|
return( 1 );
|
|
}
|
|
|
|
void Open( char *p_name )
|
|
{
|
|
fp = open(p_name, O_RDWR);
|
|
|
|
if( fp < 0 )
|
|
log( -1, "'%s', could not open file", p_name );
|
|
|
|
name = p_name;
|
|
}
|
|
|
|
void Close()
|
|
{
|
|
if( fp )
|
|
{
|
|
if( close( fp ) )
|
|
log( 0, "'%s', could not close file handle", name ? name : "unknown" );
|
|
}
|
|
}
|
|
|
|
unsigned long SizeSectors(void)
|
|
{
|
|
struct stat64 st;
|
|
unsigned long i;
|
|
|
|
if( fstat64( fp, &st ) )
|
|
log( -1, "'%s', could not retrieve file size (error %i)", name, errno );
|
|
|
|
if( st.st_size & 0x1ff )
|
|
log( -1, "'%s', file size is not a multiple of 512 byte sectors", name );
|
|
|
|
if( (st.st_size >> 32) > 0x1f )
|
|
log( -1, "'%s', file size greater than LBA28 limit of 137,438,952,960 bytes", name );
|
|
|
|
i = st.st_size >> 9;
|
|
|
|
return( (unsigned long) i );
|
|
}
|
|
|
|
void SeekSectors( unsigned long lba )
|
|
{
|
|
off64_t offset, result;
|
|
|
|
offset = lba;
|
|
offset <<= 9;
|
|
|
|
result = lseek64(fp, offset, SEEK_SET);
|
|
if( result < 0 || result != offset)
|
|
log( -1, "'%s', Failed to seek to lba=%lu", name, lba );
|
|
}
|
|
|
|
void Read( void *buff, unsigned long len )
|
|
{
|
|
unsigned long out_len;
|
|
|
|
out_len = read(fp, buff, len);
|
|
if( out_len < 0 || len != out_len )
|
|
log( -1, "'%s', ReadFile failed", name );
|
|
}
|
|
|
|
void Write( void *buff, unsigned long len )
|
|
{
|
|
unsigned long out_len;
|
|
|
|
out_len = write(fp, buff, len);
|
|
if( out_len < 0 || len != out_len )
|
|
log( -1, "'%s', WriteFile failed", name );
|
|
}
|
|
|
|
FileAccess()
|
|
{
|
|
fp = 0;
|
|
name = NULL;
|
|
}
|
|
|
|
// LBA 28 limit - 28-bits (could be 1 more, but not worth pushing it)
|
|
const static unsigned long MaxSectors = 0xfffffff;
|
|
#define USAGE_MAXSECTORS "137438 MB (LBA28 limit)"
|
|
|
|
private:
|
|
int fp;
|
|
char *name;
|
|
};
|
|
|