1 | //====================================================================== |
---|
2 | // |
---|
3 | // Project: XTIDE Universal BIOS, Serial Port Server |
---|
4 | // |
---|
5 | // File: FlatImage.cpp - Basic flat disk image file support |
---|
6 | // |
---|
7 | |
---|
8 | #include <stdio.h> |
---|
9 | #include <stdlib.h> |
---|
10 | #include <memory.h> |
---|
11 | |
---|
12 | #include "FlatImage.h" |
---|
13 | |
---|
14 | FlatImage::FlatImage( char *name, int p_readOnly, int p_drive, int p_create, unsigned long p_cyl, unsigned long p_sect, unsigned long p_head ) : Image( name, p_readOnly, p_drive, p_create, p_cyl, p_sect, p_head ) |
---|
15 | { |
---|
16 | double sizef; |
---|
17 | |
---|
18 | if( p_create ) |
---|
19 | { |
---|
20 | char buff[512]; |
---|
21 | unsigned long size; |
---|
22 | unsigned long size2; |
---|
23 | double sizef; |
---|
24 | |
---|
25 | fp = fopen( name, "r" ); |
---|
26 | if( fp ) |
---|
27 | log( 0, "Create Failure: '%s' already exists", name ); |
---|
28 | |
---|
29 | if( !(fp = fopen( name, "w" )) ) |
---|
30 | log( 0, "Could not create file '%s'", name ); |
---|
31 | |
---|
32 | memset( &buff[0], 0, 512 ); |
---|
33 | size2 = size = (unsigned long) p_cyl * (unsigned long) p_sect * (unsigned long) p_head; |
---|
34 | while( size-- ) |
---|
35 | { |
---|
36 | if( fwrite( &buff[0], 1, 512, fp ) != 512 ) |
---|
37 | log( 0, "Create write black sector error" ); |
---|
38 | } |
---|
39 | fclose( fp ); |
---|
40 | |
---|
41 | sizef = size2/2048.0; |
---|
42 | log( 1, "Created file '%s' with geometry %u:%u:%u, size %.1lf megabytes\n", name, p_cyl, p_sect, p_head, sizef ); |
---|
43 | } |
---|
44 | |
---|
45 | fp = fopen( name, "r+" ); |
---|
46 | if( !fp ) |
---|
47 | log( 0, "Could not Open %s", name ); |
---|
48 | |
---|
49 | log( 1, "Opening disk image '%s'", name ); |
---|
50 | |
---|
51 | fseek( fp, 0, SEEK_END ); |
---|
52 | totallba = ftell( fp ); |
---|
53 | |
---|
54 | if( !totallba ) |
---|
55 | log( 0, "Could not get file size" ); |
---|
56 | |
---|
57 | if( totallba & 0x1ff ) |
---|
58 | log( 0, "File not made up of 512 byte sectors" ); |
---|
59 | |
---|
60 | totallba >>= 9; |
---|
61 | if( totallba != (p_sect * p_head * p_cyl) ) |
---|
62 | { |
---|
63 | if( p_sect || p_head || p_cyl ) |
---|
64 | log( 0, "File size does not match geometry" ); |
---|
65 | else if( (totallba % 16) != 0 || ((totallba/16) % 63) != 0 ) |
---|
66 | log( 0, "File size does not match standard geometry (x:16:63), please give explicitly with -g" ); |
---|
67 | else |
---|
68 | { |
---|
69 | sect = 63; |
---|
70 | head = 16; |
---|
71 | cyl = (totallba / sect / head); |
---|
72 | } |
---|
73 | } |
---|
74 | else |
---|
75 | { |
---|
76 | sect = p_sect; |
---|
77 | head = p_head; |
---|
78 | cyl = p_cyl; |
---|
79 | } |
---|
80 | |
---|
81 | sizef = totallba/2048.0; |
---|
82 | log( 1, "Using geometry %u:%u:%u, total size %.1lf megabytes", cyl, sect, head, sizef ); |
---|
83 | } |
---|
84 | |
---|
85 | int FlatImage::seekSector( unsigned long cyl, unsigned long sect, unsigned long head ) |
---|
86 | { |
---|
87 | return( 0 ); |
---|
88 | } |
---|
89 | |
---|
90 | int FlatImage::seekSector( unsigned long lba ) |
---|
91 | { |
---|
92 | return( fseek( fp, lba * 512, SEEK_SET ) ); |
---|
93 | } |
---|
94 | |
---|
95 | int FlatImage::writeSector( void *buff ) |
---|
96 | { |
---|
97 | int r; |
---|
98 | |
---|
99 | r = fwrite( buff, 1, 512, fp ); |
---|
100 | fflush( fp ); |
---|
101 | |
---|
102 | return( r == 512 ? 0 : 1 ); |
---|
103 | } |
---|
104 | |
---|
105 | int FlatImage::readSector( void *buff ) |
---|
106 | { |
---|
107 | return( fread( buff, 1, 512, fp ) == 512 ? 0 : 1 ); |
---|
108 | } |
---|
109 | |
---|
110 | FlatImage::~FlatImage() |
---|
111 | { |
---|
112 | if( fp ) |
---|
113 | fclose( fp ); |
---|
114 | fp = NULL; |
---|
115 | } |
---|
116 | |
---|
117 | |
---|