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 //
  19 // We are DOS 6.00
  20 //
  21 #define DOS_VERSION MAKEWORD(6, 0)
  22
  23 #define DOS_CONFIG_PATH L"%SystemRoot%\\system32\\CONFIG.NT"
  24 #define DOS_COMMAND_INTERPRETER L"%SystemRoot%\\system32\\COMMAND.COM /k %SystemRoot%\\system32\\AUTOEXEC.NT"
  25 #define FIRST_MCB_SEGMENT 0x1000
  26 #define USER_MEMORY_SIZE 0x8FFE
  27 #define SYSTEM_PSP 0x08
  28 #define SYSTEM_ENV_BLOCK 0x800
  29 #define INVALID_DOS_HANDLE 0xFFFF
  30 #define DOS_INPUT_HANDLE 0
  31 #define DOS_OUTPUT_HANDLE 1
  32 #define DOS_ERROR_HANDLE 2
  33 #define DOS_SFT_SIZE 255
  34 #define SEGMENT_TO_MCB(seg) ((PDOS_MCB)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  35 #define SEGMENT_TO_PSP(seg) ((PDOS_PSP)((ULONG_PTR)BaseAddress + TO_LINEAR((seg), 0)))
  36 #define UMB_START_SEGMENT 0xC000
  37 #define UMB_END_SEGMENT 0xDFFF
  38 #define DOS_ALLOC_HIGH 0x40
  39 #define DOS_ALLOC_HIGH_LOW 0x80
  40 #define DOS_CMDLINE_LENGTH 127
  41 #define DOS_DIR_LENGTH 64
  42 #define NUM_DRIVES ('Z' - 'A' + 1)
  43 #define DOS_CHAR_ATTRIBUTE 0x07
  44
  45 enum DOS_ALLOC_STRATEGY
  46 {
  47     DOS_ALLOC_FIRST_FIT,
  48     DOS_ALLOC_BEST_FIT,
  49     DOS_ALLOC_LAST_FIT
  50 };
  51
  52 #pragma pack(push, 1)
  53
  54 typedef struct _DOS_MCB
  55 {
  56     CHAR BlockType;
  57     WORD OwnerPsp;
  58     WORD Size;
  59     BYTE Unused[3];
  60     CHAR Name[8];
  61 } DOS_MCB, *PDOS_MCB;
  62
  63 typedef struct _DOS_FCB
  64 {
  65     BYTE DriveNumber;
  66     CHAR FileName[8];
  67     CHAR FileExt[3];
  68     WORD BlockNumber;
  69     WORD RecordSize;
  70     DWORD FileSize;
  71     WORD LastWriteDate;
  72     WORD LastWriteTime;
  73     BYTE Reserved[8];
  74     BYTE BlockRecord;
  75     BYTE RecordNumber[3];
  76 } DOS_FCB, *PDOS_FCB;
  77
  78 typedef struct _DOS_PSP
  79 {
  80     BYTE Exit[2];
  81     WORD LastParagraph;
  82     BYTE Reserved0[6];
  83     DWORD TerminateAddress;
  84     DWORD BreakAddress;
  85     DWORD CriticalAddress;
  86     WORD ParentPsp;
  87     BYTE HandleTable[20];
  88     WORD EnvBlock;
  89     DWORD LastStack;
  90     WORD HandleTableSize;
  91     DWORD HandleTablePtr;
  92     DWORD PreviousPsp;
  93     DWORD Reserved1;
  94     WORD DosVersion;
  95     BYTE Reserved2[14];
  96     BYTE FarCall[3];
  97     BYTE Reserved3[9];
  98     DOS_FCB Fcb;
  99     BYTE CommandLineSize;
 100     CHAR CommandLine[DOS_CMDLINE_LENGTH];
 101 } DOS_PSP, *PDOS_PSP;
 102
 103 typedef struct _DOS_INPUT_BUFFER
 104 {
 105     BYTE MaxLength, Length;
 106     CHAR Buffer[ANYSIZE_ARRAY];
 107 } DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
 108
 109 typedef struct _DOS_DRIVER_HEADER
 110 {
 111     DWORD NextDriver;
 112     WORD Attributes;
 113     WORD StrategyEntry;
 114     WORD InterruptEntry;
 115     CHAR DeviceName[8];
 116 } DOS_DRIVER_HEADER, *PDOS_DRIVER_HEADER;
 117
 118 #pragma pack(pop)
 119
 120 /* FUNCTIONS ******************************************************************/
 121
 122 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
 123 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
 124 BOOLEAN DosFreeMemory(WORD BlockData);
 125 WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
 126 WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
 127 WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
 128 WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
 129 WORD DosSeekFile(WORD FileHandle, LONG Offset, BYTE Origin, LPDWORD NewOffset);
 130 BOOLEAN DosDuplicateHandle(WORD OldHandle, WORD NewHandle);
 131 BOOLEAN DosCloseHandle(WORD DosHandle);
 132 VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
 133 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 134 VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
 135 CHAR DosReadCharacter(VOID);
 136 VOID DosPrintCharacter(CHAR Character);
 137 BOOLEAN DosHandleIoctl(BYTE ControlCode, WORD FileHandle);
 138 VOID DosInt20h(LPWORD Stack);
 139 VOID DosInt21h(LPWORD Stack);
 140 VOID DosBreakInterrupt(LPWORD Stack);
 141 BOOLEAN DosInitialize(VOID);
 142
 143 #endif // _DOS_H_
 144
 145 /* EOF */