{
$Id: system.pas,v 1.61 2003/12/04 21:22:38 peter Exp $
****************************************************************************
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2002 by Free Pascal development team
Free Pascal - OS/2 runtime library
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
****************************************************************************}
unit {$ifdef VER1_0}sysos2{$else}System{$endif};
interface
{Link the startup code.}
{$ifdef VER1_0}
{$l prt1.oo2}
{$else}
{$l prt1.o}
{$endif}
{$ifdef SYSTEMDEBUG}
{$define SYSTEMEXCEPTIONDEBUG}
{.$define IODEBUG}
{.$define DEBUGENVIRONMENT}
{.$define DEBUGARGUMENTS}
{$endif SYSTEMDEBUG}
{ $DEFINE OS2EXCEPTIONS}
{$I systemh.inc}
{$IFDEF OS2EXCEPTIONS}
(* Types and constants for exception handler support *)
type
{x} PEXCEPTION_FRAME = ^TEXCEPTION_FRAME;
{x} TEXCEPTION_FRAME = record
{x} next : PEXCEPTION_FRAME;
{x} handler : pointer;
{x} end;
{$ENDIF OS2EXCEPTIONS}
{$I heaph.inc}
{Platform specific information}
type
THandle = Longint;
const
LineEnding = #13#10;
{ LFNSupport is defined separately below!!! }
DirectorySeparator = '\';
DriveSeparator = ':';
PathSeparator = ';';
{ FileNameCaseSensitive is defined separately below!!! }
type Tos=(osDOS,osOS2,osDPMI);
const os_mode: Tos = osOS2;
first_meg: pointer = nil;
{$IFDEF OS2EXCEPTIONS}
{x} System_exception_frame : PEXCEPTION_FRAME =nil;
{$ENDIF OS2EXCEPTIONS}
type TByteArray = array [0..$ffff] of byte;
PByteArray = ^TByteArray;
TSysThreadIB = record
TID,
Priority,
Version: cardinal;
MCCount,
MCForceFlag: word;
end;
PSysThreadIB = ^TSysThreadIB;
TThreadInfoBlock = record
PExChain,
Stack,
StackLimit: pointer;
TIB2: PSysThreadIB;
Version,
Ordinal: cardinal;
end;
PThreadInfoBlock = ^TThreadInfoBlock;
PPThreadInfoBlock = ^PThreadInfoBlock;
TProcessInfoBlock = record
PID,
ParentPid,
Handle: cardinal;
Cmd,
Env: PByteArray;
Status,
ProcType: cardinal;
end;
PProcessInfoBlock = ^TProcessInfoBlock;
PPProcessInfoBlock = ^PProcessInfoBlock;
const UnusedHandle=-1;
StdInputHandle=0;
StdOutputHandle=1;
StdErrorHandle=2;
LFNSupport: boolean = true;
FileNameCaseSensitive: boolean = false;
sLineBreak = LineEnding;
DefaultTextLineBreakStyle : TTextLineBreakStyle = tlbsCRLF;
var
{ C-compatible arguments and environment }
argc : longint; //external name '_argc';
argv : ppchar; //external name '_argv';
envp : ppchar; //external name '_environ';
EnvC: cardinal; //external name '_envc';
(* Pointer to the block of environment variables - used e.g. in unit Dos. *)
Environment: PChar;
var
(* Type / run mode of the current process: *)
(* 0 .. full screen OS/2 session *)
(* 1 .. DOS session *)
(* 2 .. VIO windowable OS/2 session *)
(* 3 .. Presentation Manager OS/2 session *)
(* 4 .. detached (background) OS/2 process *)
ApplicationType: cardinal;
implementation
{$I system.inc}
//var
// heap_base: pointer; external name '__heap_base';
// heap_brk: pointer; external name '__heap_brk';
// heap_end: pointer; external name '__heap_end';
(* Maximum heap size - only used if heap is allocated as continuous block. *)
{$IFDEF CONTHEAP}
// BrkLimit: cardinal;
{$ENDIF CONTHEAP}
procedure DosGetInfoBlocks (PATIB: PPThreadInfoBlock;
PAPIB: PPProcessInfoBlock); cdecl;
external 'DOSCALLS' index 312;
function DosLoadModule (ObjName: PChar; ObjLen: cardinal; DLLName: PChar;
var Handle: cardinal): cardinal; cdecl;
external 'DOSCALLS' index 318;
function DosQueryProcAddr (Handle, Ordinal: cardinal; ProcName: PChar;
var Address: pointer): cardinal; cdecl;
external 'DOSCALLS' index 321;
function DosSetRelMaxFH (var ReqCount: longint; var CurMaxFH: cardinal):
cardinal; cdecl;
external 'DOSCALLS' index 382;
function DosSetCurrentDir (Name:PChar): cardinal; cdecl;
external 'DOSCALLS' index 255;
procedure DosQueryCurrentDisk(var DiskNum:cardinal;var Logical:cardinal); cdecl;
external 'DOSCALLS' index 275;
function DosSetDefaultDisk (DiskNum:cardinal): cardinal; cdecl;
external 'DOSCALLS' index 220;
{ This is not real prototype, but is close enough }
{ for us (the 2nd parameter is actually a pointer }
{ to a structure). }
function DosCreateDir (Name: PChar; P: pointer): cardinal; cdecl;
external 'DOSCALLS' index 270;
function DosDeleteDir (Name: PChar): cardinal; cdecl;
external 'DOSCALLS' index 226;
function DosQueryCurrentDir(DiskNum:cardinal;var Buffer;
var BufLen:cardinal): cardinal; cdecl;
external 'DOSCALLS' index 274;
function DosMove(OldFile,NewFile:PChar):cardinal; cdecl;
external 'DOSCALLS' index 271;
function DosDelete(FileName:PChar):cardinal; cdecl;
external 'DOSCALLS' index 259;
procedure DosExit(Action, Result: cardinal); cdecl;
external 'DOSCALLS' index 234;
// EAs not used in System unit
function DosOpen(FileName:PChar;var Handle:longint;var Action:cardinal;
InitSize,Attrib,OpenFlags,FileMode:cardinal;
EA:Pointer):longint; cdecl;
external 'DOSCALLS' index 273;
function DosClose(Handle:longint): longint; cdecl;
external 'DOSCALLS' index 257;
function DosRead(Handle:longint; Buffer: Pointer;Count:longint;
var ActCount:longint):longint; cdecl;
external 'DOSCALLS' index 281;
function DosWrite(Handle:longint; Buffer: Pointer;Count:longint;
var ActCount:longint):longint; cdecl;
external 'DOSCALLS' index 282;
function DosSetFilePtr(Handle:longint;Pos:longint;Method:cardinal;
var PosActual:longint):longint; cdecl;
external 'DOSCALLS' index 256;
function DosSetFileSize(Handle:longint;Size:cardinal):longint; cdecl;
external 'DOSCALLS' index 272;
function DosQueryHType(Handle:longint;var HandType:longint;
var Attr:longint):longint; cdecl;
external 'DOSCALLS' index 224;
type
TSysDateTime=packed record
Hour,
Minute,
Second,
Sec100,
Day,
Month: byte;
Year: word;
TimeZone: smallint;
WeekDay: byte;
end;
function DosGetDateTime(var Buf:TSysDateTime):longint; cdecl;
external 'DOSCALLS' index 230;
{ converts an OS/2 error code to a TP compatible error }
{ code. Same thing exists under most other supported }
{ systems. }
{ Only call for OS/2 DLL imported routines }
Procedure Errno2InOutRes;
Begin
{ errors 1..18 are the same as in DOS }
case InOutRes of
{ simple offset to convert these error codes }
{ exactly like the error codes in Win32 }
19..31 : InOutRes := InOutRes + 131;
{ gets a bit more complicated ... }
32..33 : InOutRes := 5;
38 : InOutRes := 100;
39 : InOutRes := 101;
112 : InOutRes := 101;
110 : InOutRes := 5;
114 : InOutRes := 6;
290 : InOutRes := 290;
end;
{ all other cases ... we keep the same error code }
end;
{$IFDEF OS2EXCEPTIONS}
(*
The operating system defines a class of error conditions called exceptions, and specifies the default actions that are taken when these exceptions occur. The system default action in most cases is to terminate the thread that caused the exception.
Exception values have the following 32-bit format:
3 3 2 2 2 2 2 2 2 2 2 2 1 1 1 1 1 1 1 1 1 1
1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
旼컴쩡쩡컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
쿞ev쿎� Facility � Code �
읕컴좔좔컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴�
Sev Severity code. Possible values are described in the following list:
00 Success
01 Informational
10 Warning
11 Error
C Customer code flag.
Facility Facility code.
Code Facility's status code.
Exceptions that are specific to OS/2 Version 2.X (for example, XCPT_SIGNAL) have a facility code of 1.
System exceptions include both synchronous and asynchronous exceptions. Synchronous exceptions are caused by events that are internal to a thread's execution. For example, synchronous exceptions could be caused by invalid parameters, or by a thread's request to end its own execution.
Asynchronous exceptions are caused by events that are external to a thread's execution. For example, an asynchronous exception can be caused by a user's entering a Ctrl+C or Ctrl+Break key sequence, or by a process' issuing DosKillProcess to end the execution of another process.
The Ctrl+Break and Ctrl+C exceptions are also known as signals, or as signal exceptions.
The following tables show the symbolic names of system exceptions, their numerical values, and related information fields.
Portable, Non-Fatal, Software-Generated Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴커
쿐xception Name 쿣alue �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_GUARD_PAGE_VIOLATION �0x80000001�
� ExceptionInfo[0] - R/W flag � �
� ExceptionInfo[1] - FaultAddr � �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_UNABLE_TO_GROW_STACK �0x80010001�
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴켸
Portable, Fatal, Hardware-Generated Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컫컴컴컴컴컴컴커
쿐xception Name 쿣alue 쿝elated Trap �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_ACCESS_VIOLATION �0xC0000005�0x09, 0x0B, �
� ExceptionInfo[0] - Flags � �0x0C, 0x0D, �
� XCPT_UNKNOWN_ACCESS 0x0 � �0x0E �
� XCPT_READ_ACCESS 0x1 � � �
� XCPT_WRITE_ACCESS 0x2 � � �
� XCPT_EXECUTE_ACCESS 0x4 � � �
� XCPT_SPACE_ACCESS 0x8 � � �
� XCPT_LIMIT_ACCESS 0x10 � � �
� ExceptionInfo[1] - FaultAddr � � �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_INTEGER_DIVIDE_BY_ZERO �0xC000009B�0 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_DIVIDE_BY_ZERO �0xC0000095�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_INVALID_OPERATION �0xC0000097�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_ILLEGAL_INSTRUCTION �0xC000001C�0x06 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_PRIVILEGED_INSTRUCTION �0xC000009D�0x0D �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_INTEGER_OVERFLOW �0xC000009C�0x04 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_OVERFLOW �0xC0000098�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_UNDERFLOW �0xC000009A�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_DENORMAL_OPERAND �0xC0000094�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_INEXACT_RESULT �0xC0000096�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_FLOAT_STACK_CHECK �0xC0000099�0x10 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_DATATYPE_MISALIGNMENT �0xC000009E�0x11 �
� ExceptionInfo[0] - R/W flag � � �
� ExceptionInfo[1] - Alignment � � �
� ExceptionInfo[2] - FaultAddr � � �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_BREAKPOINT �0xC000009F�0x03 �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_SINGLE_STEP �0xC00000A0�0x01 �
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컨컴컴컴컴컴컴켸
Portable, Fatal, Software-Generated Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컫컴컴컴컴컴컴커
쿐xception Name 쿣alue 쿝elated Trap �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_IN_PAGE_ERROR �0xC0000006�0x0E �
� ExceptionInfo[0] - FaultAddr � � �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_PROCESS_TERMINATE �0xC0010001� �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_ASYNC_PROCESS_TERMINATE �0xC0010002� �
� ExceptionInfo[0] - TID of � � �
� terminating thread � � �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_NONCONTINUABLE_EXCEPTION �0xC0000024� �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_INVALID_DISPOSITION �0xC0000025� �
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컨컴컴컴컴컴컴켸
Non-Portable, Fatal Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴컫컴컴컴컴컴컴커
쿐xception Name 쿣alue 쿝elated Trap �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_INVALID_LOCK_SEQUENCE �0xC000001D� �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴컵컴컴컴컴컴컴캑
쿦CPT_ARRAY_BOUNDS_EXCEEDED �0xC0000093�0x05 �
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴컨컴컴컴컴컴컴켸
Unwind Operation Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴커
쿐xception Name 쿣alue �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_UNWIND �0xC0000026�
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_BAD_STACK �0xC0000027�
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_INVALID_UNWIND_TARGET �0xC0000028�
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴켸
Fatal Signal Exceptions
旼컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴쩡컴컴컴컴커
쿐xception Name 쿣alue �
쳐컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴탠컴컴컴컴캑
쿦CPT_SIGNAL �0xC0010003�
� ExceptionInfo[ 0 ] - Signal � �
� Number � �
읕컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴컴좔컴컴컴컴켸
*)
{$ENDIF OS2EXCEPTIONS}
{****************************************************************************
Miscellaneous related routines.
****************************************************************************}
procedure system_exit;
begin
DosExit(1{process}, exitcode);
end;
{$ASMMODE ATT}
function paramcount:longint;assembler;
asm
movl argc,%eax
decl %eax
end {['EAX']};
function args:pointer;assembler;
asm
movl argv,%eax
end {['EAX']};
function paramstr(l:longint):string;
var p:^Pchar;
begin
if (l>=0) and (l<=paramcount) then
begin
p:=args;
paramstr:=strpas(p[l]);
end
else paramstr:='';
end;
procedure randomize;
var
dt: TSysDateTime;
begin
// Hmm... Lets use timer
DosGetDateTime(dt);
randseed:=dt.hour+(dt.minute shl 8)+(dt.second shl 16)+(dt.sec100 shl 32);
end;
{$ASMMODE ATT}
{****************************************************************************
Heap management releated routines.
****************************************************************************}
{Get some memory.
P = Pointer to memory will be returned here.
Size = Number of bytes to get. The size is rounded up to a multiple
of 4096. This is probably not the case on non-intel 386
versions of OS/2.
Flags = One or more of the mfXXXX constants.}
function DosAllocMem(var P:pointer;Size,Flag:cardinal):longint; cdecl;
external 'DOSCALLS' index 299;
function DosSetMem(P:pointer;Size,Flag:cardinal):longint; cdecl;
external 'DOSCALLS' index 305;
var
int_heap: pointer;
int_heap_end: pointer;
function sbrk(size:longint):pointer;
var
p: pointer;
rc: longint;
begin
{$IFDEF DUMPGROW}
WriteLn ('Trying to grow heap by ', Size, ' to ', HeapSize + Size);
{$ENDIF}
p:=int_heap_end;
// commit memory
rc:=DosSetMem(p, size, $10+3);
if rc<>0 then p:=nil;
{$IFDEF DUMPGROW}
WriteLn ('New heap at ', Cardinal(p));
{$ENDIF}
sbrk:=int_heap_end;
inc(int_heap_end, size);
end;
function getheapstart:pointer;
begin
getheapstart:=int_heap;
end;
function getheapsize:longint;
begin
getheapsize:=longint(int_heap_end)-longint(int_heap);
end;
{$i heap.inc}
{****************************************************************************
Low Level File Routines
****************************************************************************}
procedure allowslash(p:Pchar);
{Allow slash as backslash.}
var i:longint;
begin
for i:=0 to strlen(p) do
if p[i]='/' then p[i]:='\';
end;
procedure do_close(h:longint);
begin
{ Only three standard handles under real OS/2 }
if h>2 then
begin
InOutRes:=DosClose(h);
end;
{$ifdef IODEBUG}
writeln('do_close: handle=', H, ', InOutRes=', InOutRes);
{$endif}
end;
procedure do_erase(p:Pchar);
begin
allowslash(p);
inoutres:=DosDelete(p);
end;
procedure do_rename(p1,p2:Pchar);
begin
allowslash(p1);
allowslash(p2);
inoutres:=DosMove(p1, p2);
end;
function do_read(h,addr,len:longint):longint;
Var
T: Longint;
begin
{$ifdef IODEBUG}
write('do_read: handle=', h, ', addr=', addr, ', length=', len);
{$endif}
InOutRes:=DosRead(H, Pointer(Addr), Len, T);
do_read:=T;
{$ifdef IODEBUG}
writeln(', actual_len=', t, ', InOutRes=', InOutRes);
{$endif}
end;
function do_write(h,addr,len:longint) : longint;
Var
T: Longint;
begin
{$ifdef IODEBUG}
write('do_write: handle=', h, ', addr=', addr, ', length=', len);
{$endif}
InOutRes:=DosWrite(H, Pointer(Addr), Len, T);
do_write:=T;
{$ifdef IODEBUG}
writeln(', actual_len=', t, ', InOutRes=', InOutRes);
{$endif}
end;
function do_filepos(handle:longint): longint;
var
PosActual: Longint;
begin
InOutRes:=DosSetFilePtr(Handle, 0, 1, PosActual);
do_filepos:=PosActual;
{$ifdef IODEBUG}
writeln('do_filepos: handle=', Handle, ', actual_pos=', PosActual, ', InOutRes=', InOutRes);
{$endif}
end;
procedure do_seek(handle,pos:longint);
var
PosActual: Longint;
begin
InOutRes:=DosSetFilePtr(Handle, Pos, 0 {ZeroBased}, PosActual);
{$ifdef IODEBUG}
writeln('do_seek: handle=', Handle, ', pos=', pos, ', actual_pos=', PosActual, ', InOutRes=', InOutRes);
{$endif}
end;
function do_seekend(handle:longint):longint;
var
PosActual: Longint;
begin
InOutRes:=DosSetFilePtr(Handle, 0, 2 {EndBased}, PosActual);
do_seekend:=PosActual;
{$ifdef IODEBUG}
writeln('do_seekend: handle=', Handle, ', actual_pos=', PosActual, ', InOutRes=', InOutRes);
{$endif}
end;
function do_filesize(handle:longint):longint;
var aktfilepos:longint;
begin
aktfilepos:=do_filepos(handle);
do_filesize:=do_seekend(handle);
do_seek(handle,aktfilepos);
end;
procedure do_truncate(handle,pos:longint);
begin
InOutRes:=DosSetFileSize(Handle, Pos);
do_seekend(handle);
end;
const
FileHandleCount: cardinal = 20;
function Increase_File_Handle_Count: boolean;
var Err: word;
L1: longint;
L2: cardinal;
begin
L1 := 10;
if DosSetRelMaxFH (L1, L2) <> 0 then
Increase_File_Handle_Count := false
else
if L2 > FileHandleCount then
begin
FileHandleCount := L2;
Increase_File_Handle_Count := true;
end
else
Increase_File_Handle_Count := false;
end;
procedure do_open(var f;p:pchar;flags:longint);
{
filerec and textrec have both handle and mode as the first items so
they could use the same routine for opening/creating.
when (flags and $100) the file will be append
when (flags and $1000) the file will be truncate/rewritten
when (flags and $10000) there is no check for close (needed for textfiles)
}
var
Action, Attrib, OpenFlags, FM: Cardinal;
begin
// convert unix slashes to normal slashes
allowslash(p);
// close first if opened
if ((flags and $10000)=0) then
begin
case filerec(f).mode of
fminput,fmoutput,fminout : Do_Close(filerec(f).handle);
fmclosed:;
else
begin
inoutres:=102; {not assigned}
exit;
end;
end;
end;
// reset file handle
filerec(f).handle := UnusedHandle;
Attrib:=0;
OpenFlags:=0;
// convert filesharing
FM := Flags and $FF and not (8);
(* DenyNone if sharing not specified. *)
if FM and 112 = 0 then
FM := FM or 64;
// convert filemode to filerec modes and access mode
case (FM and 3) of
0: filerec(f).mode:=fminput;
1: filerec(f).mode:=fmoutput;
2: filerec(f).mode:=fminout;
end;
if (flags and $1000)<>0 then
OpenFlags:=OpenFlags or 2 {doOverwrite} or 16 {doCreate} // Create/overwrite
else
OpenFlags:=OpenFlags or 1 {doOpen}; // Open existing
// Handle Std I/O
if p[0]=#0 then
begin
case FileRec(f).mode of
fminput :
FileRec(f).Handle:=StdInputHandle;
fminout, // this is set by rewrite
fmoutput :
FileRec(f).Handle:=StdOutputHandle;
fmappend :
begin
FileRec(f).Handle:=StdOutputHandle;
FileRec(f).mode:=fmoutput; // fool fmappend
end;
end;
exit;
end;
Attrib:=32 {faArchive};
InOutRes:=DosOpen(p, FileRec(F).Handle, Action, 0, Attrib, OpenFlags, FM, nil);
// If too many open files try to set more file handles and open again
if (InOutRes = 4) then
if Increase_File_Handle_Count then
InOutRes:=DosOpen(p, FileRec(F).Handle, Action, 0, Attrib, OpenFlags, FM, nil);
If InOutRes<>0 then FileRec(F).Handle:=UnusedHandle;
// If Handle created -> make some things
if (FileRec(F).Handle <> UnusedHandle) then
begin
// Move to end of file for Append command
if ((Flags and $100) <> 0) then
begin
do_seekend(FileRec(F).Handle);
FileRec(F).Mode := fmOutput;
end;
end;
{$ifdef IODEBUG}
writeln('do_open,', filerec(f).handle, ',', filerec(f).name, ',', filerec(f).mode, ', InOutRes=', InOutRes);
{$endif}
end;
function do_isdevice (Handle: longint): boolean;
var
HT, Attr: longint;
begin
do_isdevice:=false;
If DosQueryHType(Handle, HT, Attr)<>0 then exit;
if ht=1 then do_isdevice:=true;
end;
{$ASMMODE ATT}
{*****************************************************************************
UnTyped File Handling
*****************************************************************************}
{$i file.inc}
{*****************************************************************************
Typed File Handling
*****************************************************************************}
{$i typefile.inc}
{*****************************************************************************
Text File Handling
*****************************************************************************}
{$DEFINE EOF_CTRLZ}
{$i text.inc}
{****************************************************************************
Directory related routines.
****************************************************************************}
{*****************************************************************************
Directory Handling
*****************************************************************************}
procedure MkDir (const S: string);[IOCHECK];
var buffer:array[0..255] of char;
Rc : word;
begin
If (s='') or (InOutRes <> 0) then
exit;
move(s[1],buffer,length(s));
buffer[length(s)]:=#0;
allowslash(Pchar(@buffer));
Rc := DosCreateDir(buffer,nil);
if Rc <> 0 then
begin
InOutRes := Rc;
Errno2Inoutres;
end;
end;
procedure rmdir(const s : string);[IOCHECK];
var buffer:array[0..255] of char;
Rc : word;
begin
if (s = '.' ) then
InOutRes := 16;
If (s='') or (InOutRes <> 0) then
exit;
move(s[1],buffer,length(s));
buffer[length(s)]:=#0;
allowslash(Pchar(@buffer));
Rc := DosDeleteDir(buffer);
if Rc <> 0 then
begin
InOutRes := Rc;
Errno2Inoutres;
end;
end;
{$ASMMODE INTEL}
procedure ChDir (const S: string);[IOCheck];
var RC: cardinal;
Buffer: array [0..255] of char;
begin
If (s='') or (InOutRes <> 0) then exit;
if (Length (S) >= 2) and (S [2] = ':') then
begin
RC := DosSetDefaultDisk ((Ord (S [1]) and not ($20)) - $40);
if RC <> 0 then
InOutRes := RC
else
if Length (S) > 2 then
begin
Move (S [1], Buffer, Length (S));
Buffer [Length (S)] := #0;
AllowSlash (PChar (@Buffer));
RC := DosSetCurrentDir (@Buffer);
if RC <> 0 then
begin
InOutRes := RC;
Errno2InOutRes;
end;
end;
end else begin
Move (S [1], Buffer, Length (S));
Buffer [Length (S)] := #0;
AllowSlash (PChar (@Buffer));
RC := DosSetCurrentDir (@Buffer);
if RC <> 0 then
begin
InOutRes:= RC;
Errno2InOutRes;
end;
end;
end;
{$ASMMODE ATT}
procedure GetDir (DriveNr: byte; var Dir: ShortString);
{Written by Michael Van Canneyt.}
var sof: Pchar;
i:byte;
l,l2:cardinal;
begin
Dir [4] := #0;
{ Used in case the specified drive isn't available }
sof:=pchar(@dir[4]);
{ dir[1..3] will contain '[drivenr]:\', but is not }
{ supplied by DOS, so we let dos string start at }
{ dir[4] }
{ Get dir from drivenr : 0=default, 1=A etc... }
l:=255-3;
InOutRes:=longint (DosQueryCurrentDir(DriveNr, sof^, l));
{$WARNING Result code should be translated in some cases!}
{ Now Dir should be filled with directory in ASCIIZ, }
{ starting from dir[4] }
dir[0]:=#3;
dir[2]:=':';
dir[3]:='\';
i:=4;
{Conversion to Pascal string }
while (dir[i]<>#0) do
begin
{ convert path name to DOS }
if dir[i]='/' then
dir[i]:='\';
dir[0]:=char(i);
inc(i);
end;
{ upcase the string (FPC function) }
if drivenr<>0 then { Drive was supplied. We know it }
dir[1]:=chr(64+drivenr)
else
begin
{ We need to get the current drive from DOS function 19H }
{ because the drive was the default, which can be unknown }
DosQueryCurrentDisk(l, l2);
dir[1]:=chr(64+l);
end;
if not (FileNameCaseSensitive) then dir:=upcase(dir);
end;
{*****************************************************************************
System unit initialization.
****************************************************************************}
{****************************************************************************
Error Message writing using messageboxes
****************************************************************************}
type
TWinMessageBox = function (Parent, Owner: cardinal;
BoxText, BoxTitle: PChar; Identity, Style: cardinal): cardinal; cdecl;
TWinInitialize = function (Options: cardinal): cardinal; cdecl;
TWinCreateMsgQueue = function (Handle: cardinal; cmsg: longint): cardinal;
cdecl;
const
ErrorBufferLength = 1024;
mb_OK = $0000;
mb_Error = $0040;
mb_Moveable = $4000;
MBStyle = mb_OK or mb_Error or mb_Moveable;
WinInitialize: TWinInitialize = nil;
WinCreateMsgQueue: TWinCreateMsgQueue = nil;
WinMessageBox: TWinMessageBox = nil;
EnvSize: cardinal = 0;
var
ErrorBuf: array [0..ErrorBufferLength] of char;
ErrorLen: longint;
PMWinHandle: cardinal;
function ErrorWrite (var F: TextRec): integer;
{
An error message should always end with #13#10#13#10
}
var
P: PChar;
I: longint;
begin
if F.BufPos > 0 then
begin
if F.BufPos + ErrorLen > ErrorBufferLength then
I := ErrorBufferLength - ErrorLen
else
I := F.BufPos;
Move (F.BufPtr^, ErrorBuf [ErrorLen], I);
Inc (ErrorLen, I);
ErrorBuf [ErrorLen] := #0;
end;
if ErrorLen > 3 then
begin
P := @ErrorBuf [ErrorLen];
for I := 1 to 4 do
begin
Dec (P);
if not (P^ in [#10, #13]) then
break;
end;
end;
if ErrorLen = ErrorBufferLength then
I := 4;
if (I = 4) then
begin
WinMessageBox (0, 0, @ErrorBuf, PChar ('Error'), 0, MBStyle);
ErrorLen := 0;
end;
F.BufPos := 0;
ErrorWrite := 0;
end;
function ErrorClose (var F: TextRec): integer;
begin
if ErrorLen > 0 then
begin
WinMessageBox (0, 0, @ErrorBuf, PChar ('Error'), 0, MBStyle);
ErrorLen := 0;
end;
ErrorLen := 0;
ErrorClose := 0;
end;
function ErrorOpen (var F: TextRec): integer;
begin
TextRec(F).InOutFunc := @ErrorWrite;
TextRec(F).FlushFunc := @ErrorWrite;
TextRec(F).CloseFunc := @ErrorClose;
ErrorOpen := 0;
end;
procedure AssignError (var T: Text);
begin
Assign (T, '');
TextRec (T).OpenFunc := @ErrorOpen;
Rewrite (T);
end;
procedure SysInitStdIO;
begin
{ Setup stdin, stdout and stderr, for GUI apps redirect stderr,stdout to be
displayed in a messagebox }
(*
StdInputHandle := longint(GetStdHandle(cardinal(STD_INPUT_HANDLE)));
StdOutputHandle := longint(GetStdHandle(cardinal(STD_OUTPUT_HANDLE)));
StdErrorHandle := longint(GetStdHandle(cardinal(STD_ERROR_HANDLE)));
if not IsConsole then
begin
if (DosLoadModule (nil, 0, 'PMWIN', PMWinHandle) = 0) and
(DosQueryProcAddr (PMWinHandle, 789, nil, pointer (WinMessageBox)) = 0)
and
(DosQueryProcAddr (PMWinHandle, 763, nil, pointer (WinInitialize)) = 0)
and
(DosQueryProcAddr (PMWinHandle, 716, nil, pointer (WinCreateMsgQueue))
= 0)
then
begin
WinInitialize (0);
WinCreateMsgQueue (0, 0);
end
else
HandleError (2);
AssignError (StdErr);
AssignError (StdOut);
Assign (Output, '');
Assign (Input, '');
end
else
begin
*)
OpenStdIO (Input, fmInput, StdInputHandle);
OpenStdIO (Output, fmOutput, StdOutputHandle);
OpenStdIO (StdOut, fmOutput, StdOutputHandle);
OpenStdIO (StdErr, fmOutput, StdErrorHandle);
(*
end;
*)
end;
function strcopy(dest,source : pchar) : pchar;assembler;
var
saveeax,saveesi,saveedi : longint;
asm
movl %edi,saveedi
movl %esi,saveesi
{$ifdef REGCALL}
movl %eax,saveeax
movl %edx,%edi
{$else}
movl source,%edi
{$endif}
testl %edi,%edi
jz .LStrCopyDone
leal 3(%edi),%ecx
andl $-4,%ecx
movl %edi,%esi
subl %edi,%ecx
{$ifdef REGCALL}
movl %eax,%edi
{$else}
movl dest,%edi
{$endif}
jz .LStrCopyAligned
.LStrCopyAlignLoop:
movb (%esi),%al
incl %edi
incl %esi
testb %al,%al
movb %al,-1(%edi)
jz .LStrCopyDone
decl %ecx
jnz .LStrCopyAlignLoop
.balign 16
.LStrCopyAligned:
movl (%esi),%eax
movl %eax,%edx
leal 0x0fefefeff(%eax),%ecx
notl %edx
addl $4,%esi
andl %edx,%ecx
andl $0x080808080,%ecx
jnz .LStrCopyEndFound
movl %eax,(%edi)
addl $4,%edi
jmp .LStrCopyAligned
.LStrCopyEndFound:
testl $0x0ff,%eax
jz .LStrCopyByte
testl $0x0ff00,%eax
jz .LStrCopyWord
testl $0x0ff0000,%eax
jz .LStrCopy3Bytes
movl %eax,(%edi)
jmp .LStrCopyDone
.LStrCopy3Bytes:
xorb %dl,%dl
movw %ax,(%edi)
movb %dl,2(%edi)
jmp .LStrCopyDone
.LStrCopyWord:
movw %ax,(%edi)
jmp .LStrCopyDone
.LStrCopyByte:
movb %al,(%edi)
.LStrCopyDone:
{$ifdef REGCALL}
movl saveeax,%eax
{$else}
movl dest,%eax
{$endif}
movl saveedi,%edi
movl saveesi,%esi
end;
procedure InitEnvironment;
var env_count : longint;
dos_env,cp : pchar;
begin
env_count:=0;
cp:=environment;
while cp ^ <> #0 do
begin
inc(env_count);
while (cp^ <> #0) do inc(longint(cp)); { skip to NUL }
inc(longint(cp)); { skip to next character }
end;
envp := sysgetmem((env_count+1) * sizeof(pchar));
envc := env_count;
if (envp = nil) then exit;
cp:=environment;
env_count:=0;
while cp^ <> #0 do
begin
envp[env_count] := sysgetmem(strlen(cp)+1);
strcopy(envp[env_count], cp);
{$IfDef DEBUGENVIRONMENT}
Writeln(stderr,'env ',env_count,' = "',envp[env_count],'"');
{$EndIf}
inc(env_count);
while (cp^ <> #0) do
inc(longint(cp)); { skip to NUL }
inc(longint(cp)); { skip to next character }
end;
envp[env_count]:=nil;
end;
procedure InitArguments;
var
arglen,
count : longint;
argstart,
pc,arg : pchar;
quote : char;
argvlen : longint;
procedure allocarg(idx,len:longint);
begin
if idx>=argvlen then
begin
argvlen:=(idx+8) and (not 7);
sysreallocmem(argv,argvlen*sizeof(pointer));
end;
{ use realloc to reuse already existing memory }
{ always allocate, even if length is zero, since }
{ the arg. is still present! }
sysreallocmem(argv[idx],len+1);
end;
begin
count:=0;
argv:=nil;
argvlen:=0;
// Get argv[0]
pc:=cmdline;
Arglen:=0;
repeat
Inc(Arglen);
until (pc[Arglen]=#0);
allocarg(count,arglen);
move(pc^,argv[count]^,arglen);
{ ReSetup cmdline variable }
repeat
Inc(Arglen);
until (pc[Arglen]=#0);
Inc(Arglen);
pc:=GetMem(ArgLen);
move(cmdline^, pc^, arglen);
Arglen:=0;
repeat
Inc(Arglen);
until (pc[Arglen]=#0);
pc[Arglen]:=' '; // combine argv[0] and command line
CmdLine:=pc;
{ process arguments }
pc:=cmdline;
{$IfDef DEBUGARGUMENTS}
Writeln(stderr,'GetCommandLine is #',pc,'#');
{$EndIf }
while pc^<>#0 do
begin
{ skip leading spaces }
while pc^ in [#1..#32] do
inc(pc);
if pc^=#0 then
break;
{ calc argument length }
quote:=' ';
argstart:=pc;
arglen:=0;
while (pc^<>#0) do
begin
case pc^ of
#1..#32 :
begin
if quote<>' ' then
inc(arglen)
else
break;
end;
'"' :
begin
if quote<>'''' then
begin
if pchar(pc+1)^<>'"' then
begin
if quote='"' then
quote:=' '
else
quote:='"';
end
else
inc(pc);
end
else
inc(arglen);
end;
'''' :
begin
if quote<>'"' then
begin
if pchar(pc+1)^<>'''' then
begin
if quote='''' then
quote:=' '
else
quote:='''';
end
else
inc(pc);
end
else
inc(arglen);
end;
else
inc(arglen);
end;
inc(pc);
end;
{ copy argument }
{ Don't copy the first one, it is already there.}
If Count<>0 then
begin
allocarg(count,arglen);
quote:=' ';
pc:=argstart;
arg:=argv[count];
while (pc^<>#0) do
begin
case pc^ of
#1..#32 :
begin
if quote<>' ' then
begin
arg^:=pc^;
inc(arg);
end
else
break;
end;
'"' :
begin
if quote<>'''' then
begin
if pchar(pc+1)^<>'"' then
begin
if quote='"' then
quote:=' '
else
quote:='"';
end
else
inc(pc);
end
else
begin
arg^:=pc^;
inc(arg);
end;
end;
'''' :
begin
if quote<>'"' then
begin
if pchar(pc+1)^<>'''' then
begin
if quote='''' then
quote:=' '
else
quote:='''';
end
else
inc(pc);
end
else
begin
arg^:=pc^;
inc(arg);
end;
end;
else
begin
arg^:=pc^;
inc(arg);
end;
end;
inc(pc);
end;
arg^:=#0;
end;
{$IfDef DEBUGARGUMENTS}
Writeln(stderr,'dos arg ',count,' #',arglen,'#',argv[count],'#');
{$EndIf}
inc(count);
end;
{ get argc and create an nil entry }
argc:=count;
allocarg(argc,0);
{ free unused memory }
sysreallocmem(argv,(argc+1)*sizeof(pointer));
end;
function GetFileHandleCount: longint;
var L1: longint;
L2: cardinal;
begin
L1 := 0; (* Don't change the amount, just check. *)
if DosSetRelMaxFH (L1, L2) <> 0 then GetFileHandleCount := 50
else GetFileHandleCount := L2;
end;
var TIB: PThreadInfoBlock;
PIB: PProcessInfoBlock;
begin
IsLibrary := FALSE;
(* Initialize the amount of file handles *)
FileHandleCount := GetFileHandleCount;
DosGetInfoBlocks (@TIB, @PIB);
StackBottom := TIB^.Stack;
{Set type of application}
ApplicationType := PIB^.ProcType;
IsConsole := ApplicationType <> 3;
exitproc:=nil;
{Initialize the heap.}
// Logic is following:
// Application allocates maximum possible memory array (~512Mb),
// but without commiting. On heap growing required amount of
// memory commited. So heap can be grown up to 512Mb.
// For newer systems maximum ammount of memory block can be
// 2 Gb, but here used 512 for campatability reasons.
// Note: Check for higher limit of heap not implemented yet.
// Note: Check for amount of memory for process not implemented yet.
// While used hard-coded value of max heapsize (256Mb)
DosAllocMem(Int_Heap, 256*1024*1024, 3);
Int_Heap_End:=Int_Heap;
InitHeap;
{ ... and exceptions }
SysInitExceptions;
{ ... and I/O }
SysInitStdIO;
{ no I/O-Error }
inoutres:=0;
{Initialize environment (must be after InitHeap because allocates memory)}
Environment := pointer (PIB^.Env);
InitEnvironment;
CmdLine := pointer (PIB^.Cmd);
InitArguments;
{$ifdef HASVARIANT}
initvariantmanager;
{$endif HASVARIANT}
{$IFDEF DUMPGROW}
{$IFDEF CONTHEAP}
WriteLn ('Initial brk size is ', GetHeapSize);
// WriteLn ('Brk limit is ', BrkLimit);
{$ENDIF CONTHEAP}
{$ENDIF DUMPGROW}
end.
{
$Log: system.pas,v $
Revision 1.61 2003/12/04 21:22:38 peter
* regcall updates (untested)
Revision 1.60 2003/11/23 07:21:16 yuri
* native heap
Revision 1.59 2003/11/19 18:21:11 yuri
* Memory allocation bug fixed
Revision 1.58 2003/11/19 16:50:21 yuri
* Environment and arguments initialization now native
Revision 1.57 2003/11/06 17:20:44 yuri
* Unused constants removed
Revision 1.56 2003/11/03 09:42:28 marco
* Peter's Cardinal<->Longint fixes patch
Revision 1.55 2003/11/02 00:51:17 hajny
* corrections for do_open and os_mode back
Revision 1.54 2003/10/28 14:57:31 yuri
* do_* functions now native
Revision 1.53 2003/10/27 04:33:58 yuri
* os_mode removed (not required anymore)
Revision 1.52 2003/10/25 22:45:37 hajny
* file handling related fixes
Revision 1.51 2003/10/19 12:13:41 hajny
* UnusedHandle value made the same as with other targets
Revision 1.50 2003/10/19 09:37:00 hajny
* minor fix in non-default sbrk code
Revision 1.49 2003/10/19 09:06:28 hajny
* fix for terrible long-time bug in do_open
Revision 1.48 2003/10/18 16:58:39 hajny
* stdcall fixes again
Revision 1.47 2003/10/16 15:43:13 peter
* THandle is platform dependent
Revision 1.46 2003/10/14 21:10:06 hajny
* another longint2cardinal fix
Revision 1.45 2003/10/13 21:17:31 hajny
* longint to cardinal corrections
Revision 1.44 2003/10/12 18:07:30 hajny
* wrong use of Intel syntax
Revision 1.43 2003/10/12 17:59:40 hajny
* wrong use of Intel syntax
Revision 1.42 2003/10/12 17:52:28 hajny
* wrong use of Intel syntax
Revision 1.41 2003/10/12 10:45:36 hajny
* sbrk error handling corrected
Revision 1.40 2003/10/07 21:26:35 hajny
* stdcall fixes and asm routines cleanup
Revision 1.39 2003/10/06 16:58:27 yuri
* Another set of native functions.
Revision 1.38 2003/10/06 14:22:40 yuri
* Some emx code removed. Now withous so stupid error as with dos ;)
Revision 1.37 2003/10/04 08:30:59 yuri
* at&t syntax instead of intel syntax was used
Revision 1.36 2003/10/03 21:46:41 peter
* stdcall fixes
Revision 1.35 2003/10/01 18:42:49 yuri
* Unclosed comment
Revision 1.34 2003/09/29 18:39:59 hajny
* append fix applied to GO32v2, OS/2 and EMX
Revision 1.33 2003/09/27 11:52:36 peter
* sbrk returns pointer
Revision 1.32 2003/03/30 09:20:30 hajny
* platform extension unification
Revision 1.31 2003/01/15 22:16:12 hajny
* default sharing mode changed to DenyNone
Revision 1.30 2002/12/15 22:41:41 hajny
* First_Meg fixed + Environment initialization under Dos
Revision 1.29 2002/12/08 16:39:58 hajny
- WriteLn in GUI mode support commented out until fixed
Revision 1.28 2002/12/07 19:17:14 hajny
* GetEnv correction, better PM support, ...
Revision 1.27 2002/11/17 22:31:02 hajny
* type corrections (longint x cardinal)
Revision 1.26 2002/10/27 14:29:00 hajny
* heap management (hopefully) fixed
Revision 1.25 2002/10/14 19:39:17 peter
* threads unit added for thread support
Revision 1.24 2002/10/13 09:28:45 florian
+ call to initvariantmanager inserted
Revision 1.23 2002/09/07 16:01:25 peter
* old logs removed and tabs fixed
Revision 1.22 2002/07/01 16:29:05 peter
* sLineBreak changed to normal constant like Kylix
Revision 1.21 2002/04/21 15:54:20 carl
+ initialize some global variables
Revision 1.20 2002/04/12 17:42:16 carl
+ generic stack checking
Revision 1.19 2002/03/11 19:10:33 peter
* Regenerated with updated fpcmake
Revision 1.18 2002/02/10 13:46:20 hajny
* heap management corrected (heap_brk)
}
syntax highlighted by Code2HTML, v. 0.9.1