ReactOS 0.4.15-dev-7674-gc0b4db1
vfdfat.c
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1/*
2 vfdfat.c
3
4 Virtual Floppy Drive for Windows
5 Driver control library
6 Formats the image with FAT12
7
8 Copyright (C) 2003-2005 Ken Kato
9*/
10
11#ifdef __cplusplus
12#pragma message(__FILE__": Compiled as C++ for testing purpose.")
13#endif // __cplusplus
14
15#define WIN32_LEAN_AND_MEAN
16#include <windows.h>
17
18#include "vfdtypes.h"
19#include "vfdio.h"
20#include "vfdlib.h"
21#include "vfdver.h"
22
23#pragma pack(1)
24//
25// BIOS parameter block
26//
27typedef struct _DOS_BPB
28{
41}
43
44//
45// Extended BIOS parameter block for FAT12/16/HUGE
46//
47typedef struct _EXBPB
48{
55}
57
58//
59// Partition Boot Record
60//
61typedef struct _DOS_PBR { // Partition Boot Record
62 UCHAR jump[3]; // Jump Instruction (E9 or EB, xx, 90)
63 CHAR oemid[8]; // OEM ID (OS type)
64 DOS_BPB bpb; // BIOS parameter block
65 EXBPB exbpb; // Extended BIOS parameter block
66}
68
69#pragma pack()
70
71#define FAT_DIR_ENTRY_SIZE 32
72
73// We need to have the 0xeb and 0x90 in the jump code
74// because the file system recognizer checks these values
75#define VFD_JUMP_CODE "\xeb\x3c\x90"
76#define VFD_OEM_NAME "VFD" VFD_DRIVER_VERSION_STR " "
77#define VFD_VOLUME_LABEL "NO NAME "
78#define VFD_FILESYSTEM "FAT12 "
79
80//
81// Select DOS BPB parameters from media size
82//
83static const DOS_BPB *SelectDosBpb(
84 USHORT nSectors)
85{
86 static const DOS_BPB bpb_tbl[] = {
87 // b/s s/c r fat root sec desc s/f s/t h
88 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 320, 0xFE, 1, 8, 1, 0, 0}, // 160KB 5.25"
89 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 360, 0xFC, 1, 9, 1, 0, 0}, // 180KB 5.25"
90 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 640, 0xFF, 1, 8, 2, 0, 0}, // 320KB 5.25"
91 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 720, 0xFD, 2, 9, 2, 0, 0}, // 360KB 5.25"
92 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 1280, 0xFB, 2, 8, 2, 0, 0}, // 640KB 5.25" / 3.5"
93 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 1440, 0xF9, 3, 9, 2, 0, 0}, // 720KB 5.25" / 3.5"
94 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 112, 1640, 0xF9, 3, 10, 2, 0, 0}, // 820KB 3.5"
95 {VFD_BYTES_PER_SECTOR, 1, 1, 2, 224, 2400, 0xF9, 7, 15, 2, 0, 0}, // 1.20MB 5.25" / 3.5"
96 {VFD_BYTES_PER_SECTOR, 1, 1, 2, 224, 2880, 0xF0, 9, 18, 2, 0, 0}, // 1.44MB 3.5"
97 {VFD_BYTES_PER_SECTOR, 1, 1, 2, 224, 3360, 0xF0, 10, 21, 2, 0, 0}, // 1.68MB 3.5"
98 {VFD_BYTES_PER_SECTOR, 1, 1, 2, 224, 3444, 0xF0, 10, 21, 2, 0, 0}, // 1.72MB 3.5"
99 {VFD_BYTES_PER_SECTOR, 2, 1, 2, 240, 5760, 0xF0, 9, 36, 2, 0, 0}, // 2.88MB 3.5"
100 };
101
102 int i;
103
104 for (i = 0; i < sizeof(bpb_tbl) / sizeof(bpb_tbl[0]); i++) {
105 if (nSectors == bpb_tbl[i].SmallSectors) {
106 return &bpb_tbl[i];
107 }
108 }
109
110 return NULL;
111}
112
113//
114// Format the buffer with FAT12
115//
118 ULONG nSectors)
119{
120 const DOS_BPB *bpb; // BIOS Parameter Block
121 PDOS_PBR pbr; // Partition Boot Record
122 PUCHAR fat; // File Allocation Table
123 USHORT idx;
124
125 VFDTRACE(0,
126 ("[VFD] VfdFormatImage - IN\n"));
127
128 //
129 // Select DOS BPB parameters from media size
130 //
131 bpb = SelectDosBpb((USHORT)nSectors);
132
133 if (!bpb) {
134 VFDTRACE(0,
135 ("[VFD] Unsupported media size %lu\n",
136 nSectors));
138 }
139
140 //
141 // Initialize the whole area with the fill data
142 //
144 VFD_SECTOR_TO_BYTE(nSectors),
146
147 //
148 // Make up the FAT boot record
149 //
151
152 pbr = (PDOS_PBR)pBuffer;
153
154 CopyMemory(pbr->jump, VFD_JUMP_CODE, sizeof(pbr->jump));
155 CopyMemory(pbr->oemid, VFD_OEM_NAME, sizeof(pbr->oemid));
156 CopyMemory(&pbr->bpb, bpb, sizeof(pbr->bpb));
157
158 // Make up the extended BPB
159
160 pbr->exbpb.BootSignature = 0x29;
161
162 // use the tick count as the volume serial number
164
166 VFD_VOLUME_LABEL, sizeof(pbr->exbpb.VolumeLabel));
167
169 VFD_FILESYSTEM, sizeof(pbr->exbpb.FileSystemType));
170
171 // Set the boot record signature
172
173 *(pBuffer + VFD_BYTES_PER_SECTOR - 2) = 0x55;
174 *(pBuffer + VFD_BYTES_PER_SECTOR - 1) = 0xaa;
175
176 //
177 // Clear FAT areas
178 //
180
182 fat,
184
185 //
186 // Make up FAT entries for the root directory
187 //
188 for (idx = 0; idx < bpb->NumberOfFATs; idx++) {
189 *fat = bpb->MediaDescriptor;
190 *(fat + 1) = 0xff;
191 *(fat + 2) = 0xff;
192
194 }
195
196 //
197 // Clear root directory entries
198 //
200
201 VFDTRACE(0,
202 ("[VFD] VfdFormatImage - OUT\n"));
203
204 return ERROR_SUCCESS;
205}
#define ERROR_SUCCESS
Definition: deptool.c:10
#define NULL
Definition: types.h:112
unsigned int idx
Definition: utils.c:41
#define ERROR_INVALID_PARAMETER
Definition: compat.h:101
DWORD WINAPI GetTickCount(VOID)
Definition: time.c:455
#define FillMemory(BUF, SIZ, MASK)
Definition: strucsup.c:31
unsigned long DWORD
Definition: ntddk_ex.h:95
GLsizei GLenum const GLvoid GLsizei GLenum GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLint GLint GLint GLshort GLshort GLshort GLubyte GLubyte GLubyte GLuint GLuint GLuint GLushort GLushort GLushort GLbyte GLbyte GLbyte GLbyte GLdouble GLdouble GLdouble GLdouble GLfloat GLfloat GLfloat GLfloat GLint GLint GLint GLint GLshort GLshort GLshort GLshort GLubyte GLubyte GLubyte GLubyte GLuint GLuint GLuint GLuint GLushort GLushort GLushort GLushort GLboolean const GLdouble const GLfloat const GLint const GLshort const GLbyte const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLdouble const GLfloat const GLfloat const GLint const GLint const GLshort const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort const GLdouble const GLfloat const GLint const GLshort GLenum GLenum GLenum GLfloat GLenum GLint GLenum GLenum GLenum GLfloat GLenum GLenum GLint GLenum GLfloat GLenum GLint GLint GLushort GLenum GLenum GLfloat GLenum GLenum GLint GLfloat const GLubyte GLenum GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLint GLint GLsizei GLsizei GLint GLenum GLenum const GLvoid GLenum GLenum const GLfloat GLenum GLenum const GLint GLenum GLenum const GLdouble GLenum GLenum const GLfloat GLenum GLenum const GLint GLsizei GLuint GLfloat GLuint GLbitfield GLfloat GLint GLuint GLboolean GLenum GLfloat GLenum GLbitfield GLenum GLfloat GLfloat GLint GLint const GLfloat GLenum GLfloat GLfloat GLint GLint GLfloat GLfloat GLint GLint const GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat GLint GLfloat GLfloat const GLdouble const GLfloat const GLdouble const GLfloat GLint i
Definition: glfuncs.h:248
static unsigned char * fat
Definition: mkdosfs.c:542
unsigned short USHORT
Definition: pedump.c:61
PVOID pBuffer
USHORT SmallSectors
Definition: vfdfat.c:34
USHORT SectorsPerTrack
Definition: vfdfat.c:37
ULONG HiddenSectors
Definition: vfdfat.c:39
ULONG LargeSectors
Definition: vfdfat.c:40
UCHAR SectorsPerCluster
Definition: vfdfat.c:30
USHORT NumberOfHeads
Definition: vfdfat.c:38
USHORT RootEntries
Definition: vfdfat.c:33
USHORT BytesPerSector
Definition: vfdfat.c:29
UCHAR NumberOfFATs
Definition: vfdfat.c:32
UCHAR MediaDescriptor
Definition: vfdfat.c:35
USHORT ReservedSectors
Definition: vfdfat.c:31
USHORT SectorsPerFAT
Definition: vfdfat.c:36
UCHAR jump[3]
Definition: vfdfat.c:62
EXBPB exbpb
Definition: vfdfat.c:65
DOS_BPB bpb
Definition: vfdfat.c:64
CHAR oemid[8]
Definition: vfdfat.c:63
Definition: vfdfat.c:48
UCHAR BootSignature
Definition: vfdfat.c:51
ULONG VolumeSerialNumber
Definition: vfdfat.c:52
UCHAR PhysicalDriveNumber
Definition: vfdfat.c:49
UCHAR Reserved
Definition: vfdfat.c:50
CHAR VolumeLabel[11]
Definition: vfdfat.c:53
CHAR FileSystemType[8]
Definition: vfdfat.c:54
unsigned char * PUCHAR
Definition: typedefs.h:53
uint32_t ULONG
Definition: typedefs.h:59
#define VFDTRACE(LEVEL, STRING)
Definition: vfddbg.h:72
#define FAT_DIR_ENTRY_SIZE
Definition: vfdfat.c:71
struct _EXBPB EXBPB
struct _DOS_BPB DOS_BPB
struct _EXBPB * PEXBPB
struct _DOS_PBR * PDOS_PBR
struct _DOS_BPB * PDOS_BPB
static const DOS_BPB * SelectDosBpb(USHORT nSectors)
Definition: vfdfat.c:83
DWORD FormatBufferFat(PUCHAR pBuffer, ULONG nSectors)
Definition: vfdfat.c:116
#define VFD_FILESYSTEM
Definition: vfdfat.c:78
#define VFD_OEM_NAME
Definition: vfdfat.c:76
#define VFD_JUMP_CODE
Definition: vfdfat.c:75
#define VFD_VOLUME_LABEL
Definition: vfdfat.c:77
struct _DOS_PBR DOS_PBR
#define VFD_FORMAT_FILL_DATA
Definition: vfdio.h:51
#define VFD_BYTES_PER_SECTOR
Definition: vfdio.h:40
#define VFD_SECTOR_TO_BYTE(s)
Definition: vfdio.h:45
#define ZeroMemory
Definition: winbase.h:1712
#define CopyMemory
Definition: winbase.h:1710
unsigned char UCHAR
Definition: xmlstorage.h:181
char CHAR
Definition: xmlstorage.h:175