[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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[589] | 5 | // File: File.h - File access via standard "stdio.h" routines |
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[219] | 6 | // |
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| 7 | // Routines for accessing the file system using generic routines, which |
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[526] | 8 | // should work on all systems. The issue with using these is that |
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[219] | 9 | // ftell() and fseek() are limited to 2 GB files (signed 32-bit quantities) |
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[526] | 10 | // and there is no standard for 64-bit quantities. So, look for a |
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| 11 | // OS specific version of this file in the distribution, such as |
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[219] | 12 | // win32/win32file.h which may be in use instead. |
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[526] | 13 | // |
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[219] | 14 | |
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[376] | 15 | // |
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[526] | 16 | // XTIDE Universal BIOS and Associated Tools |
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| 17 | // Copyright (C) 2009-2010 by Tomi Tilli, 2011-2013 by XTIDE Universal BIOS Team. |
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[376] | 18 | // |
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| 19 | // This program is free software; you can redistribute it and/or modify |
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| 20 | // it under the terms of the GNU General Public License as published by |
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| 21 | // the Free Software Foundation; either version 2 of the License, or |
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| 22 | // (at your option) any later version. |
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[526] | 23 | // |
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[376] | 24 | // This program is distributed in the hope that it will be useful, |
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| 25 | // but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 26 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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[526] | 27 | // GNU General Public License for more details. |
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[376] | 28 | // Visit http://www.gnu.org/licenses/old-licenses/gpl-2.0.html |
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| 29 | // |
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| 30 | |
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[219] | 31 | #include <stdio.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 = fopen( p_name, "r" ); |
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| 39 | |
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| 40 | if( fp ) |
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[225] | 41 | { |
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| 42 | log( 0, "'%s' file already exists", p_name ); |
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| 43 | fclose( fp ); |
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| 44 | return( 0 ); |
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| 45 | } |
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[526] | 46 | |
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[219] | 47 | if( !(fp = fopen( p_name, "w" )) ) |
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| 48 | log( -1, "Could not create file '%s'", p_name ); |
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| 49 | |
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| 50 | name = p_name; |
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[526] | 51 | |
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[225] | 52 | return( 1 ); |
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[219] | 53 | } |
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| 54 | |
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| 55 | void Open( char *p_name ) |
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| 56 | { |
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| 57 | fp = fopen( p_name, "r+" ); |
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| 58 | if( !fp ) |
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| 59 | log( -1, "Could not Open '%s'", p_name ); |
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| 60 | name = p_name; |
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| 61 | } |
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| 62 | |
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| 63 | void Close() |
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| 64 | { |
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| 65 | if( fp ) |
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| 66 | fclose( fp ); |
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| 67 | fp = NULL; |
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| 68 | } |
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| 69 | |
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| 70 | unsigned long SizeSectors(void) |
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| 71 | { |
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| 72 | long filesize; |
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| 73 | |
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| 74 | fseek( fp, 0, SEEK_END ); |
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| 75 | filesize = ftell( fp ); |
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| 76 | |
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| 77 | if( filesize == 0 || filesize == -1L ) |
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| 78 | log( -1, "Could not get file size for '%s', file possibly larger than 2 GB", name ); |
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| 79 | |
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| 80 | if( filesize & 0x1ff ) |
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| 81 | log( -1, "'%s' not made up of 512 byte sectors", name ); |
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| 82 | |
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| 83 | return( filesize >> 9 ); // 512 bytes per sector |
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| 84 | } |
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| 85 | |
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| 86 | void SeekSectors( unsigned long lba ) |
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| 87 | { |
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| 88 | if( fseek( fp, lba * 512, SEEK_SET ) ) |
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| 89 | log( -1, "'%s', Failed to seek to lba=%lu", name, lba ); |
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| 90 | } |
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| 91 | |
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| 92 | void Read( void *buff, unsigned long len ) |
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| 93 | { |
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| 94 | if( fread( buff, 1, 512, fp ) != 512 ) |
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| 95 | log( -1, "'%s', Failed to read sector", name ); |
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| 96 | } |
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| 97 | |
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| 98 | void Write( void *buff, unsigned long len ) |
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| 99 | { |
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| 100 | if( fwrite( buff, 1, 512, fp ) != 512 ) |
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| 101 | log( -1, "'%s', Failed to write sector", name ); |
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| 102 | } |
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| 103 | |
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| 104 | FileAccess() |
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| 105 | { |
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| 106 | fp = NULL; |
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| 107 | name = NULL; |
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| 108 | } |
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| 109 | |
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[526] | 110 | const static unsigned long MaxSectors = 4194303; // limited by signed 32-bit file sizes |
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[219] | 111 | #define USAGE_MAXSECTORS "2048 MB (signed 32-bit file size limit)" |
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| 112 | |
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| 113 | private: |
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| 114 | FILE *fp; |
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| 115 | char *name; |
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| 116 | }; |
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| 117 | |
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