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: FlatImage.cpp - Basic flat disk image file support |
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6 | // |
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7 | |
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8 | #include <stdio.h> |
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9 | #include <stdlib.h> |
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10 | #include <memory.h> |
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11 | |
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12 | #include "FlatImage.h" |
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13 | |
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14 | FlatImage::FlatImage( char *name, int p_readOnly, int p_drive, int p_create, unsigned long p_cyl, unsigned long p_head, unsigned long p_sect, int p_useCHS ) : Image( name, p_readOnly, p_drive, p_create, p_cyl, p_head, p_sect, p_useCHS ) |
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15 | { |
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16 | long filesize; |
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17 | |
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18 | if( p_create ) |
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19 | { |
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20 | char buff[512]; |
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21 | unsigned long size; |
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22 | unsigned long size2; |
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23 | double sizef; |
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24 | |
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25 | fp = fopen( name, "r" ); |
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26 | if( fp ) |
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27 | log( -1, "Create Failure: '%s' already exists", name ); |
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28 | |
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29 | if( !(fp = fopen( name, "w" )) ) |
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30 | log( -1, "Could not create file '%s'", name ); |
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31 | |
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32 | memset( &buff[0], 0, 512 ); |
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33 | size2 = size = (unsigned long) p_cyl * (unsigned long) p_sect * (unsigned long) p_head; |
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34 | while( size-- ) |
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35 | { |
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36 | if( fwrite( &buff[0], 1, 512, fp ) != 512 ) |
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37 | log( -1, "Create write black sector error" ); |
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38 | } |
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39 | fclose( fp ); |
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40 | |
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41 | sizef = size2/2048.0; |
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42 | if( p_cyl > 1024 ) |
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43 | log( 0, "Created file '%s', size %.1lf MB", name, sizef ); |
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44 | else |
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45 | log( 0, "Created file '%s', geometry %u:%u:%u, size %.1lf MB", name, p_cyl, p_sect, p_head, sizef ); |
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46 | } |
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47 | |
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48 | fp = fopen( name, "r+" ); |
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49 | if( !fp ) |
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50 | log( -1, "Could not Open '%s'", name ); |
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51 | |
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52 | fseek( fp, 0, SEEK_END ); |
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53 | filesize = ftell( fp ); |
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54 | |
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55 | if( filesize == 0 || filesize == -1L ) |
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56 | log( -1, "Could not get file size for '%s', file possibly larger than 2 GB", name ); |
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57 | |
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58 | if( filesize & 0x1ff ) |
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59 | log( -1, "'%s' not made up of 512 byte sectors", name ); |
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60 | |
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61 | totallba = filesize >> 9; // 512 bytes per sector |
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62 | |
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63 | init( name, p_readOnly, p_drive, p_cyl, p_head, p_sect, p_useCHS ); |
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64 | } |
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65 | |
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66 | int FlatImage::seekSector( unsigned long cyl, unsigned long sect, unsigned long head ) |
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67 | { |
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68 | return( 0 ); |
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69 | } |
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70 | |
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71 | int FlatImage::seekSector( unsigned long lba ) |
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72 | { |
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73 | return( fseek( fp, lba * 512, SEEK_SET ) ); |
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74 | } |
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75 | |
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76 | int FlatImage::writeSector( void *buff ) |
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77 | { |
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78 | int r; |
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79 | |
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80 | r = fwrite( buff, 1, 512, fp ); |
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81 | fflush( fp ); |
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82 | |
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83 | return( r == 512 ? 0 : 1 ); |
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84 | } |
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85 | |
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86 | int FlatImage::readSector( void *buff ) |
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87 | { |
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88 | return( fread( buff, 1, 512, fp ) == 512 ? 0 : 1 ); |
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89 | } |
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90 | |
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91 | FlatImage::~FlatImage() |
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92 | { |
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93 | if( fp ) |
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94 | fclose( fp ); |
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95 | fp = NULL; |
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96 | } |
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97 | |
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98 | |
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