reactos/subsystems/ntvdm/dos.h

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/*
* COPYRIGHT: GPL - See COPYING in the top level directory
* PROJECT: ReactOS Virtual DOS Machine
* FILE: dos.h
* PURPOSE: VDM DOS Kernel (header file)
* PROGRAMMERS: Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
*/
#ifndef _DOS_H_
#define _DOS_H_
/* INCLUDES *******************************************************************/
#include "ntvdm.h"
/* DEFINES ********************************************************************/
#define DOS_VERSION MAKEWORD(6, 0)
#define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
#define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
#define FIRST_MCB_SEGMENT 0x1000
#define USER_MEMORY_SIZE 0x8FFE
#define SYSTEM_PSP 0x08
#define SYSTEM_ENV_BLOCK 0x800
#define INVALID_DOS_HANDLE 0xFFFF
#define DOS_INPUT_HANDLE 0
#define DOS_OUTPUT_HANDLE 1
#define DOS_ERROR_HANDLE 2
#define DOS_SFT_SIZE 255
#define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
#define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
#define UMB_START_SEGMENT 0xC000
#define UMB_END_SEGMENT 0xDFFF
#define DOS_ALLOC_HIGH 0x40
#define DOS_ALLOC_HIGH_LOW 0x80
#define DOS_CMDLINE_LENGTH 127
enum DOS_ALLOC_STRATEGY
{
DOS_ALLOC_FIRST_FIT,
DOS_ALLOC_BEST_FIT,
DOS_ALLOC_LAST_FIT
};
#pragma pack(push, 1)
typedef struct _DOS_MCB
{
CHAR BlockType;
WORD OwnerPsp;
WORD Size;
BYTE Unused[3];
CHAR Name[8];
} DOS_MCB, *PDOS_MCB;
typedef struct _DOS_FCB
{
BYTE DriveNumber;
CHAR FileName[8];
CHAR FileExt[3];
WORD BlockNumber;
WORD RecordSize;
DWORD FileSize;
WORD LastWriteDate;
WORD LastWriteTime;
BYTE Reserved[8];
BYTE BlockRecord;
BYTE RecordNumber[3];
} DOS_FCB, *PDOS_FCB;
typedef struct _DOS_PSP
{
BYTE Exit[2];
WORD LastParagraph;
BYTE Reserved0[6];
DWORD TerminateAddress;
DWORD BreakAddress;
DWORD CriticalAddress;
WORD ParentPsp;
BYTE HandleTable[20];
WORD EnvBlock;
DWORD LastStack;
WORD HandleTableSize;
DWORD HandleTablePtr;
DWORD PreviousPsp;
DWORD Reserved1;
WORD DosVersion;
BYTE Reserved2[14];
BYTE FarCall[3];
BYTE Reserved3[9];
DOS_FCB Fcb;
BYTE CommandLineSize;
CHAR CommandLine[DOS_CMDLINE_LENGTH];
} DOS_PSP, *PDOS_PSP;
typedef struct _DOS_INPUT_BUFFER
{
BYTE MaxLength, Length;
CHAR Buffer[ANYSIZE_ARRAY];
} DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
typedef struct _DOS_DRIVER_HEADER
{
DWORD NextDriver;
WORD Attributes;
WORD StrategyEntry;
WORD InterruptEntry;
CHAR DeviceName[8];
} DOS_DRIVER_HEADER, *PDOS_DRIVER_HEADER;
#pragma pack(pop)
/* FUNCTIONS ******************************************************************/
WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
BOOLEAN DosFreeMemory(WORD BlockData);
WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
WORD DosSeekFile(WORD FileHandle, LONG Offset, BYTE Origin, LPDWORD NewOffset);
BOOLEAN DosDuplicateHandle(WORD OldHandle, WORD NewHandle);
BOOLEAN DosCloseHandle(WORD DosHandle);
VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
CHAR DosReadCharacter(VOID);
VOID DosPrintCharacter(CHAR Character);
BOOLEAN DosHandleIoctl(BYTE ControlCode, WORD FileHandle);
VOID DosInt20h(LPWORD Stack);
VOID DosInt21h(LPWORD Stack);
VOID DosBreakInterrupt(LPWORD Stack);
BOOLEAN DosInitialize(VOID);
#endif
/* EOF */