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 0x8FFF
  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
  33 #pragma pack(push, 1)
  34
  35 typedef struct _DOS_MCB
  36 {
  37     CHAR BlockType;
  38     WORD OwnerPsp;
  39     WORD Size;
  40     BYTE Unused[3];
  41     CHAR Name[8];
  42 } DOS_MCB, *PDOS_MCB;
  43
  44 typedef struct _DOS_FCB
  45 {
  46     BYTE DriveNumber;
  47     CHAR FileName[8];
  48     CHAR FileExt[3];
  49     WORD BlockNumber;
  50     WORD RecordSize;
  51     DWORD FileSize;
  52     WORD LastWriteDate;
  53     WORD LastWriteTime;
  54     BYTE Reserved[8];
  55     BYTE BlockRecord;
  56     BYTE RecordNumber[3];
  57 } DOS_FCB, *PDOS_FCB;
  58
  59 typedef struct _DOS_PSP
  60 {
  61     BYTE Exit[2];
  62     WORD LastParagraph;
  63     BYTE Reserved0[6];
  64     DWORD TerminateAddress;
  65     DWORD BreakAddress;
  66     DWORD CriticalAddress;
  67     WORD ParentPsp;
  68     BYTE HandleTable[20];
  69     WORD EnvBlock;
  70     DWORD LastStack;
  71     WORD HandleTableSize;
  72     DWORD HandleTablePtr;
  73     DWORD PreviousPsp;
  74     DWORD Reserved1;
  75     WORD DosVersion;
  76     BYTE Reserved2[14];
  77     BYTE FarCall[3];
  78     BYTE Reserved3[9];
  79     DOS_FCB Fcb;
  80     BYTE CommandLineSize;
  81     CHAR CommandLine[127];
  82 } DOS_PSP, *PDOS_PSP;
  83
  84 typedef struct _DOS_INPUT_BUFFER
  85 {
  86     BYTE MaxLength, Length;
  87     CHAR Buffer[ANYSIZE_ARRAY];
  88 } DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
  89
  90 #pragma pack(pop)
  91
  92 /* FUNCTIONS ******************************************************************/
  93
  94 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
  95 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
  96 BOOLEAN DosFreeMemory(WORD BlockData);
  97 WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
  98 WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
  99 WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
 100 WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
 101 VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
 102 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 103 VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
 104 CHAR DosReadCharacter();
 105 VOID DosPrintCharacter(CHAR Character);
 106 VOID DosInt20h(WORD CodeSegment);
 107 VOID DosInt21h(WORD CodeSegment);
 108 VOID DosBreakInterrupt();
 109 BOOLEAN DosInitialize();
 110
 111 #endif
 112
 113 /* EOF */
 114