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
  37 enum DOS_ALLOC_STRATEGY
  38 {
  39     DOS_ALLOC_FIRST_FIT,
  40     DOS_ALLOC_BEST_FIT,
  41     DOS_ALLOC_LAST_FIT
  42 };
  43
  44 #pragma pack(push, 1)
  45
  46 typedef struct _DOS_MCB
  47 {
  48     CHAR BlockType;
  49     WORD OwnerPsp;
  50     WORD Size;
  51     BYTE Unused[3];
  52     CHAR Name[8];
  53 } DOS_MCB, *PDOS_MCB;
  54
  55 typedef struct _DOS_FCB
  56 {
  57     BYTE DriveNumber;
  58     CHAR FileName[8];
  59     CHAR FileExt[3];
  60     WORD BlockNumber;
  61     WORD RecordSize;
  62     DWORD FileSize;
  63     WORD LastWriteDate;
  64     WORD LastWriteTime;
  65     BYTE Reserved[8];
  66     BYTE BlockRecord;
  67     BYTE RecordNumber[3];
  68 } DOS_FCB, *PDOS_FCB;
  69
  70 typedef struct _DOS_PSP
  71 {
  72     BYTE Exit[2];
  73     WORD LastParagraph;
  74     BYTE Reserved0[6];
  75     DWORD TerminateAddress;
  76     DWORD BreakAddress;
  77     DWORD CriticalAddress;
  78     WORD ParentPsp;
  79     BYTE HandleTable[20];
  80     WORD EnvBlock;
  81     DWORD LastStack;
  82     WORD HandleTableSize;
  83     DWORD HandleTablePtr;
  84     DWORD PreviousPsp;
  85     DWORD Reserved1;
  86     WORD DosVersion;
  87     BYTE Reserved2[14];
  88     BYTE FarCall[3];
  89     BYTE Reserved3[9];
  90     DOS_FCB Fcb;
  91     BYTE CommandLineSize;
  92     CHAR CommandLine[127];
  93 } DOS_PSP, *PDOS_PSP;
  94
  95 typedef struct _DOS_INPUT_BUFFER
  96 {
  97     BYTE MaxLength, Length;
  98     CHAR Buffer[ANYSIZE_ARRAY];
  99 } DOS_INPUT_BUFFER, *PDOS_INPUT_BUFFER;
 100
 101 #pragma pack(pop)
 102
 103 /* FUNCTIONS ******************************************************************/
 104
 105 WORD DosAllocateMemory(WORD Size, WORD *MaxAvailable);
 106 BOOLEAN DosResizeMemory(WORD BlockData, WORD NewSize, WORD *MaxAvailable);
 107 BOOLEAN DosFreeMemory(WORD BlockData);
 108 WORD DosCreateFile(LPWORD Handle, LPCSTR FilePath, WORD Attributes);
 109 WORD DosOpenFile(LPWORD Handle, LPCSTR FilePath, BYTE AccessMode);
 110 WORD DosReadFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesRead);
 111 WORD DosWriteFile(WORD FileHandle, LPVOID Buffer, WORD Count, LPWORD BytesWritten);
 112 WORD DosSeekFile(WORD FileHandle, LONG Offset, BYTE Origin, LPDWORD NewOffset);
 113 BOOLEAN DosDuplicateHandle(WORD OldHandle, WORD NewHandle);
 114 BOOLEAN DosCloseHandle(WORD DosHandle);
 115 VOID DosInitializePsp(WORD PspSegment, LPCSTR CommandLine, WORD ProgramSize, WORD Environment);
 116 BOOLEAN DosCreateProcess(LPCSTR CommandLine, WORD EnvBlock);
 117 VOID DosTerminateProcess(WORD Psp, BYTE ReturnCode);
 118 CHAR DosReadCharacter(VOID);
 119 VOID DosPrintCharacter(CHAR Character);
 120 VOID DosInt20h(WORD CodeSegment);
 121 VOID DosInt21h(WORD CodeSegment);
 122 VOID DosBreakInterrupt(VOID);
 123 BOOLEAN DosInitialize(VOID);
 124
 125 #endif
 126
 127 /* EOF */
 128