[219] | 1 | //====================================================================== |
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| 2 | // |
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| 3 | // Project: XTIDE Universal BIOS, Serial Port Server |
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| 4 | // |
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| 5 | // File: Win32File.h - Microsoft Windows file system access. |
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| 6 | // |
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| 7 | // Routines for accessing the file system under Win32. It's important |
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| 8 | // to use these direct Win32 calls for large files, since FILE * routines, |
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[505] | 9 | // in particular ftell() and fseek(), are limited to signed 32-bits (2 GB). |
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[219] | 10 | // These are also likely faster since they are more direct. |
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[505] | 11 | // |
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[219] | 12 | |
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[376] | 13 | // |
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[505] | 14 | // XTIDE Universal BIOS and Associated Tools |
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[526] | 15 | // Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 16 | // |
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| 17 | // This program is free software; you can redistribute it and/or modify |
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| 18 | // it under the terms of the GNU General Public License as published by |
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| 19 | // the Free Software Foundation; either version 2 of the License, or |
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| 20 | // (at your option) any later version. |
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[505] | 21 | // |
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[376] | 22 | // This program is distributed in the hope that it will be useful, |
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| 23 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 24 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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[505] | 25 | // GNU General Public License for more details. |
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[376] | 26 | // Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 27 | // |
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| 28 | |
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[219] | 29 | #include <windows.h> |
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| 30 | #include <stdio.h> |
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| 31 | #include "../library/library.h" |
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| 32 | |
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| 33 | class FileAccess |
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| 34 | { |
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| 35 | public: |
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[225] | 36 | int Create( char *p_name ) |
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[219] | 37 | { |
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| 38 | fp = CreateFileA( p_name, GENERIC_WRITE, 0, 0, CREATE_NEW, FILE_ATTRIBUTE_NORMAL, 0 ); |
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[225] | 39 | |
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| 40 | if( fp == INVALID_HANDLE_VALUE ) |
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| 41 | { |
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| 42 | if( GetLastError() == ERROR_FILE_EXISTS ) |
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| 43 | { |
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| 44 | log( 0, "'%s', file already exists", p_name ); |
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| 45 | return( 0 ); |
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| 46 | } |
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| 47 | else |
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| 48 | log( -1, "'%s', could not create file", p_name ); |
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| 49 | } |
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| 50 | |
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[219] | 51 | name = p_name; |
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[225] | 52 | |
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| 53 | return( 1 ); |
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[219] | 54 | } |
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| 55 | |
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| 56 | void Open( char *p_name ) |
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| 57 | { |
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| 58 | fp = CreateFileA( p_name, GENERIC_READ|GENERIC_WRITE, 0, 0, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0 ); |
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[225] | 59 | |
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| 60 | if( fp == INVALID_HANDLE_VALUE ) |
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[219] | 61 | log( -1, "'%s', could not open file", p_name ); |
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[225] | 62 | |
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[219] | 63 | name = p_name; |
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| 64 | } |
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| 65 | |
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| 66 | void Close() |
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| 67 | { |
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| 68 | if( fp ) |
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| 69 | { |
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| 70 | if( !CloseHandle( fp ) ) |
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[505] | 71 | log( 0, "'%s', could not close file handle", name ? name : "unknown" ); |
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[219] | 72 | } |
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| 73 | } |
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| 74 | |
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| 75 | unsigned long SizeSectors(void) |
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| 76 | { |
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| 77 | LARGE_INTEGER li; |
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| 78 | unsigned long i; |
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| 79 | |
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| 80 | if( !GetFileSizeEx( fp, &li ) ) |
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| 81 | log( -1, "'%s', could not retrieve file size (error %ul)", name, GetLastError() ); |
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| 82 | |
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| 83 | if( li.LowPart & 0x1ff ) |
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| 84 | log( -1, "'%s', file size is not a multiple of 512 byte sectors", name ); |
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| 85 | |
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| 86 | if( li.HighPart > 0x1f ) |
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| 87 | log( -1, "'%s', file size greater than LBA28 limit of 137,438,952,960 bytes", name ); |
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| 88 | |
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| 89 | i = ((li.HighPart << 23 ) & 0xff800000) | ((li.LowPart >> 9) & 0x7fffff); |
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| 90 | |
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| 91 | return( (unsigned long) i ); |
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| 92 | } |
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| 93 | |
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| 94 | void SeekSectors( unsigned long lba ) |
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| 95 | { |
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| 96 | LARGE_INTEGER dist; |
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| 97 | |
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| 98 | dist.HighPart = lba >> 23; |
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| 99 | dist.LowPart = lba << 9; |
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| 100 | |
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| 101 | if( !SetFilePointerEx( fp, dist, NULL, FILE_BEGIN ) ) |
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| 102 | log( -1, "'%s', Failed to seek to lba=%lu", name, lba ); |
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| 103 | } |
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| 104 | |
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| 105 | void Read( void *buff, unsigned long len ) |
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| 106 | { |
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| 107 | unsigned long out_len; |
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| 108 | |
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| 109 | if( !ReadFile( fp, buff, len, &out_len, NULL ) || len != out_len ) |
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[225] | 110 | log( -1, "'%s', ReadFile failed", name ); |
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[219] | 111 | } |
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| 112 | |
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| 113 | void Write( void *buff, unsigned long len ) |
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| 114 | { |
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| 115 | unsigned long out_len; |
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| 116 | |
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| 117 | if( !WriteFile( fp, buff, len, &out_len, NULL ) || len != out_len ) |
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[225] | 118 | log( -1, "'%s', WriteFile failed", name ); |
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[219] | 119 | } |
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| 120 | |
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| 121 | FileAccess() |
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| 122 | { |
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| 123 | fp = NULL; |
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| 124 | name = NULL; |
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| 125 | } |
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| 126 | |
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| 127 | // LBA 28 limit - 28-bits (could be 1 more, but not worth pushing it) |
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[505] | 128 | const static unsigned long MaxSectors = 0xfffffff; |
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[219] | 129 | #define USAGE_MAXSECTORS "137438 MB (LBA28 limit)" |
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| 130 | |
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| 131 | private: |
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| 132 | HANDLE fp; |
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| 133 | char *name; |
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| 134 | }; |
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| 135 | |
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