subsystems/ntvdm/dos.h

   1 /*
   2  * COPYRIGHT:       GPL - See COPYING in the top level directory
   3  * PROJECT:         ReactOS Virtual DOS Machine
   4  * FILE:            dos.h
   5  * PURPOSE:         VDM DOS Kernel (header file)
   6  * PROGRAMMERS:     Aleksandar Andrejevic <theflash AT sdf DOT lonestar DOT org>
   7  */
   8
   9 #ifndef _DOS_H_
  10 #define _DOS_H_
  11
  12 /* INCLUDES *******************************************************************/
  13
  14 #include "ntvdm.h"
  15
  16 /* DEFINES ********************************************************************/
  17
  18 #define DOS_VERSION MAKEWORD(6, 0)
  19 #define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
  20 #define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
  21 #define FIRST_MCB_SEGMENT 0x1000
  22 #define USER_MEMORY_SIZE 0x8FFE
  23 #define SYSTEM_PSP 0x08
  24 #define SYSTEM_ENV_BLOCK 0x800
  25 #define INVALID_DOS_HANDLE 0xFFFF
  26 #define DOS_INPUT_HANDLE 0
  27 #define DOS_OUTPUT_HANDLE 1
  28 #define DOS_ERROR_HANDLE 2
  29 #define DOS_SFT_SIZE 255
  30 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  31 #define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  32 #define UMB_START_SEGMENT 0xC000
  33 #define UMB_END_SEGMENT 0xDFFF
  34 #define DOS_ALLOC_HIGH 0x40
  35 #define DOS_ALLOC_HIGH_LOW 0x80
  36 #define DOS_CMDLINE_LENGTH 127
  37 #define DOS_DIR_LENGTH 64
  38 #define NUM_DRIVES ('Z' - 'A' + 1)
  39
  40 enum DOS_ALLOC_STRATEGY
  41 {
  42     DOS_ALLOC_FIRST_FIT,
  43     DOS_ALLOC_BEST_FIT,
  44     DOS_ALLOC_LAST_FIT
  45 };
  46
  47 #pragma pack(push, 1)
  48
  49 typedef struct _DOS_MCB
  50 {
  51     CHAR BlockType;
  52     WORD OwnerPsp;
  53     WORD Size;
  54     BYTE Unused[3];
  55     CHAR Name[8];
  56 } DOS_MCB, *PDOS_MCB;
  57
  58 typedef struct _DOS_FCB
  59 {
  60     BYTE DriveNumber;
  61     CHAR FileName[8];
  62     CHAR FileExt[3];
  63     WORD BlockNumber;
  64     WORD RecordSize;
  65     DWORD FileSize;
  66     WORD LastWriteDate;
  67     WORD LastWriteTime;
  68     BYTE Reserved[8];
  69     BYTE BlockRecord;
  70     BYTE RecordNumber[3];
  71 } DOS_FCB, *PDOS_FCB;
  72
  73 typedef struct _DOS_PSP
  74 {
  75     BYTE Exit[2];
  76     WORD LastParagraph;
  77     BYTE Reserved0[6];
  78     DWORD TerminateAddress;
  79     DWORD BreakAddress;
  80     DWORD CriticalAddress;
  81     WORD ParentPsp;
  82     BYTE HandleTable[20];
  83     WORD EnvBlock;
  84     DWORD LastStack;
  85     WORD HandleTableSize;
  86     DWORD HandleTablePtr;
  87     DWORD PreviousPsp;
  88     DWORD Reserved1;
  89     WORD DosVersion;
  90     BYTE Reserved2[14];
  91     BYTE FarCall[3];
  92     BYTE Reserved3[9];
  93     DOS_FCB Fcb;
  94     BYTE CommandLineSize;
  95     CHAR CommandLine[DOS_CMDLINE_LENGTH];
  96 } DOS_PSP, *PDOS_PSP;
  97
  98 typedef struct _DOS_INPUT_BUFFER
  99 {
 100     BYTE MaxLength, Length;
 101     CHAR Buffer[ANYSIZE_ARRAY];
 102 } DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
 103
 104 typedef struct _DOS_DRIVER_HEADER
 105 {
 106     DWORD NextDriver;
 107     WORD Attributes;
 108     WORD StrategyEntry;
 109     WORD InterruptEntry;
 110     CHAR DeviceName[8];
 111 } DOS_DRIVER_HEADER, *PDOS_DRIVER_HEADER;
 112
 113 #pragma pack(pop)
 114
 115 /* FUNCTIONS ******************************************************************/
 116
 117 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
 118 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
 119 BOOLEAN DosFreeMemory(WORD BlockData);
 120 WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
 121 WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
 122 WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
 123 WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
 124 WORD DosSeekFile(WORD FileHandle, LONG Offset, BYTE Origin, LPDWORD NewOffset);
 125 BOOLEAN DosDuplicateHandle(WORD OldHandle, WORD NewHandle);
 126 BOOLEAN DosCloseHandle(WORD DosHandle);
 127 VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
 128 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 129 VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
 130 CHAR DosReadCharacter(VOID);
 131 VOID DosPrintCharacter(CHAR Character);
 132 BOOLEAN DosHandleIoctl(BYTE ControlCode, WORD FileHandle);
 133 VOID DosInt20h(LPWORD Stack);
 134 VOID DosInt21h(LPWORD Stack);
 135 VOID DosBreakInterrupt(LPWORD Stack);
 136 BOOLEAN DosInitialize(VOID);
 137
 138 #endif // _DOS_H_
 139
 140 /* EOF */