mirror of
https://github.com/MiSTer-devel/PCXT_MiSTer.git
synced 2026-04-19 03:04:47 +00:00
a987c96a6d
* The UART port is changed to the internal MiSTer port, now it is possible to use the core without using a USB cable
136 lines
3.4 KiB
C++
136 lines
3.4 KiB
C++
//======================================================================
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//
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// Project: XTIDE Universal BIOS, Serial Port Server
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//
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// File: Win32File.h - Microsoft Windows file system access.
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//
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// Routines for accessing the file system under Win32. It's important
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// to use these direct Win32 calls for large files, since FILE * routines,
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// in particular ftell() and fseek(), are limited to signed 32-bits (2 GB).
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// These are also likely faster since they are more direct.
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//
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//
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// XTIDE Universal BIOS and Associated Tools
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// Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team.
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//
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// This program is free software; you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation; either version 2 of the License, or
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// (at your option) any later version.
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//
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// This program is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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//
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#include <windows.h>
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#include <stdio.h>
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#include "../library/library.h"
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class FileAccess
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{
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public:
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int Create( char *p_name )
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{
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fp = CreateFileA( p_name, GENERIC_WRITE, 0, 0, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, 0 );
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if( fp == INVALID_HANDLE_VALUE )
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{
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if( GetLastError() == ERROR_FILE_EXISTS )
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{
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log( 0, "'%s', file already exists", p_name );
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return( 0 );
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}
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else
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log( -1, "'%s', could not create file", p_name );
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}
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name = p_name;
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return( 1 );
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}
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void Open( char *p_name )
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{
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fp = CreateFileA( p_name, GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 );
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if( fp == INVALID_HANDLE_VALUE )
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log( -1, "'%s', could not open file", p_name );
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name = p_name;
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}
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void Close()
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{
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if( fp )
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{
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if( !CloseHandle( fp ) )
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log( 0, "'%s', could not close file handle", name ? name : "unknown" );
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}
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}
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unsigned long SizeSectors(void)
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{
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LARGE_INTEGER li;
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unsigned long i;
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if( !GetFileSizeEx( fp, &li ) )
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log( -1, "'%s', could not retrieve file size (error %ul)", name, GetLastError() );
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if( li.LowPart & 0x1ff )
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log( -1, "'%s', file size is not a multiple of 512 byte sectors", name );
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if( li.HighPart > 0x1f )
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log( -1, "'%s', file size greater than LBA28 limit of 137,438,952,960 bytes", name );
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i = ((li.HighPart << 23 ) & 0xff800000) | ((li.LowPart >> 9) & 0x7fffff);
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return( (unsigned long) i );
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}
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void SeekSectors( unsigned long lba )
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{
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LARGE_INTEGER dist;
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dist.HighPart = lba >> 23;
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dist.LowPart = lba << 9;
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if( !SetFilePointerEx( fp, dist, NULL, FILE_BEGIN ) )
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log( -1, "'%s', Failed to seek to lba=%lu", name, lba );
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}
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void Read( void *buff, unsigned long len )
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{
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unsigned long out_len;
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if( !ReadFile( fp, buff, len, &out_len, NULL ) || len != out_len )
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log( -1, "'%s', ReadFile failed", name );
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}
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void Write( void *buff, unsigned long len )
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{
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unsigned long out_len;
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if( !WriteFile( fp, buff, len, &out_len, NULL ) || len != out_len )
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log( -1, "'%s', WriteFile failed", name );
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}
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FileAccess()
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{
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fp = NULL;
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name = NULL;
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}
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// LBA 28 limit - 28-bits (could be 1 more, but not worth pushing it)
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const static unsigned long MaxSectors = 0xfffffff;
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#define USAGE_MAXSECTORS "137438 MB (LBA28 limit)"
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private:
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HANDLE fp;
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char *name;
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};
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