84 lines
2.6 KiB
C
84 lines
2.6 KiB
C
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//////////////////////////////////////////////////////////////////////////////
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//
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// jolietdevice.h - implementation of BootDevice class for Joliet volumes
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//
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// Copyright (c) Microsoft Corporation. All rights reserved.
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//
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#ifndef __JOLIETDEVICE_H__
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#define __JOLIETDEVICE_H__
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#include "singldr.h"
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#include "bootdevice.h"
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//////////////////////////////////////////////////////////////////////////////
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//
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// Linked-in Functions (not declared in any headers)
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// from singldr0.asm
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extern "C" uint16 __cdecl BiosDiskRead(uint8 __far * addr, uint32 diskblock, uint16 blocks, uint16 driveid);
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extern "C" uint16 __cdecl PModeTransfer(uint32 StartAddress, uint32 DestinationAddress, uint32 bytes);
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//////////////////////////////////////////////////////////////////////////////
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//
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// Declaration for class JolietDevice
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#pragma pack(4)
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struct __near JolietDevice : BootDevice
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{
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private:
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// Drive Characteristics
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uint8 BootDrive;
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// Volume Characteristics
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uint32 BlockSize;
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// Root Directory Characteristics
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uint32 RootStartBlock;
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uint32 RootSize;
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// data buffer -- this is reused frequently. Be careful
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// about what you assume is in it.
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uint8 __far * FileBuffer;
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// method for looking an entry up in a directory
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int __near DirLookup(LPCHAR filename,
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uint8 len,
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FilePtr Directory,
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FilePtr File) __far;
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public:
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// constructor -- Hack alert - the complier claims that:
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// "2 overloads have similar conversions" when the second
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// parameter isn't given.
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JolietDevice(uint8 driveId, uint8 /* nullParam */) __far
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{
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this->BootDrive = driveId;
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// since this is public, define it as part of constructing the object
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// for maximum compatibility, we just allocate it and leave it
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// null (alloc zeros it)
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this->CmdLine = (uint16 __far *)alloc(2048, 2);
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}
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// implement the virtual functions from the base class
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int __near OpenDevice() __far;
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int __near CloseDevice() __far;
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int __near GetFileProperties(LPCHAR filename,
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FilePtr file,
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FilePtr directory) __far;
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INT16 __near ReadFileLow(LPCHAR filename,
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FilePtr file,
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uint8 __far * buffer) __far;
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UINT32 __near ReadFileHigh(LPCHAR filename,
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FilePtr file,
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uint32 buffer,
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uint32 cbBuffer) __far;
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};
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#pragma pack()
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#endif
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