{
    $Id$
    This file is part of the Free Pascal Run time library.
    Copyright (c) 1993,97 by the Free Pascal development team

    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.

 **********************************************************************}

{*****************************************************************************
   This File contains the OS independent declarations of the system unit
*****************************************************************************}

{****************************************************************************
                   Support for multiple compiler versions
****************************************************************************}

{$i version.inc}

{****************************************************************************
                         Global Types and Constants
****************************************************************************}

Type
  Longint  = $80000000..$7fffffff;
  Integer  = -32768..32767;
  shortint = -128..127;
  byte     = 0..255;
  Word     = 0..65535;


{ at least declare Turbo Pascal real types }
{$IFDEF i386}
  Double = real;
{$ENDIF}

{ some type aliases }
  dword    = cardinal;
  longword = cardinal;

{ Zero - terminated strings }
  PChar  = ^Char;
  PPChar = ^PChar;

{ procedure type }
  TProcedure = Procedure;

const
{ max. values for longint and int}
  maxLongint = $7fffffff;
  maxint = 32767;


{ Compatibility With  TP }
{$ifdef i386}
  Test8086 : byte = 2;       { Always i386 or newer }
  Test8087 : byte = 3;       { Always 387 or newer. Emulated if needed. }
{$endif i386}
{$ifdef m68k}
  Test68000 : byte = 0;      { Must be determined at startup for both }
  Test68881 : byte = 0;
{$endif}

{ max level in dumping on error }
  Max_Frame_Dump : Word = 20;
{ Exit Procedure handling consts and types  }
  ExitProc : pointer=nil;
  Erroraddr: pointer = nil;
  Errorcode: Word    = 0;

{ file input modes }
  fmClosed = $D7B0;
  fmInput  = $D7B1;
  fmOutput = $D7B2;
  fmInOut  = $D7B3;
  fmAppend = $D7B4;
  Filemode : byte = 2;

var
{ Standard In- and Output }
  Output,
  Input,
  StdErr      : Text;
  ExitCode,
  InOutRes    : Word;
  StackBottom,
  LowestStack,
  RandSeed    : Longint;

{****************************************************************************
                        Processor specific routines
****************************************************************************}

Procedure Move(Var source,dest;count:Longint);
Procedure FillChar(Var x;count:Longint;Value:Char);
Procedure FillChar(Var x;count:Longint;Value:byte);
Procedure FillWord(Var x;count:Longint;Value:Word);

{****************************************************************************
                               Math Routines
****************************************************************************}

Function  lo(w:Word):byte;
Function  lo(l:Longint):Word;
Function  lo(i:Integer):byte;
Function  lo(B: Byte):Byte;
Function  hi(w:Word):byte;
Function  hi(i:Integer):byte;
Function  hi(l:Longint):Word;
Function  Hi(B : Byte): byte;

Procedure Inc(Var i:cardinal);
Procedure Inc(Var i:Longint);
Procedure Inc(Var i:Integer);
Procedure Inc(Var i:Word);
Procedure Inc(Var i:shortint);
Procedure Inc(Var i:byte);
Procedure Inc(Var c:Char);
Procedure Inc(Var p:PChar);
Procedure Dec(Var i:cardinal);
Procedure Dec(Var i:Longint);
Procedure Dec(Var i:Integer);
Procedure Dec(Var i:Word);
Procedure Dec(Var i:shortint);
Procedure Dec(Var i:byte);
Procedure Dec(Var c:Char);
Procedure Dec(Var p:PChar);
Function Chr(b:byte):Char;
Function Length(s:string):byte;

Procedure Dec(Var i:cardinal;a:Longint);
Procedure Inc(Var i:cardinal;a:Longint);
Procedure Dec(Var i:Longint;a:Longint);
Procedure Inc(Var i:Longint;a:Longint);
Procedure Dec(Var i:Word;a:Longint);
Procedure Inc(Var i:Word;a:Longint);
Procedure Dec(Var i:Integer;a:Longint);
Procedure Inc(Var i:Integer;a:Longint);
Procedure Dec(Var i:byte;a:Longint);
Procedure Inc(Var i:byte;a:Longint);
Procedure Dec(Var i:shortint;a:Longint);
Procedure Inc(Var i:shortint;a:Longint);
Procedure Dec(Var c:Char;a:Longint);
Procedure Inc(Var c:Char;a:Longint);
Procedure Dec(Var p:PChar;a:Longint);
Procedure Inc(Var p:PChar;a:Longint);
Function  Swap (X:Word):Word;
Function  Swap (X:Integer):Integer;
Function  Swap (X:Cardinal):Cardinal;
Function  Swap (X:Longint):Longint;

Function  Random(l:Longint):Longint;
Function  Random:real;
Procedure Randomize;

Function abs(l:Longint):Longint;
Function sqr(l:Longint):Longint;
Function odd(l:Longint):Boolean;
{ float mathe routines }
{$I mathh.inc}


{****************************************************************************
                             Memory management
****************************************************************************}

Procedure getmem(Var p:pointer;Size:Longint);
Procedure freemem(Var p:pointer;Size:Longint);
Function  memavail:Longint;
Function  maxavail:Longint;
Function  ptr(sel,off:Longint):pointer;
Function  Addr (Var X):pointer;
Function  Cseg:Word;
Function  Dseg:Word;
Function  Sseg:Word;

{****************************************************************************
                              PChar Handling
****************************************************************************}

function strpas(p:pchar):string;
function strlen(p:pchar):longint;

{****************************************************************************
                              String Handling
****************************************************************************}

Function  copy(const s:string;index:Integer;count:Integer):string;
Procedure Delete(Var s:string;index:Integer;count:Integer);
Procedure Insert(const source:string;Var s:string;index:Integer);
Function  Pos(const substr:string;const s:string):byte;
Function  Pos(C:Char;const s:string):byte;
Function  upCase(c:Char):Char;
Function  upCase(const s:string):string;
Function  lowerCase(c:Char):Char;
Function  lowerCase(const s:string):string;
Function  Space(b:byte):string;
Function  hexStr(Val:Longint;cnt:byte):string;
Function  binStr(Val:Longint;cnt:byte):string;
Procedure Val(const s:string;Var l:Longint;Var code:Word);
Procedure Val(const s:string;Var l:Longint;Var code:Integer);
Procedure Val(const s:string;Var l:Longint);
Procedure Val(const s:string;Var b:byte;Var code:Word);
Procedure Val(const s:string;Var b:byte;Var code:Integer);
Procedure Val(const s:string;Var b:byte);
Procedure Val(const s:string;Var b:shortint;Var code:Word);
Procedure Val(const s:string;Var b:shortint;Var code:Integer);
Procedure Val(const s:string;Var b:shortint);
Procedure Val(const s:string;Var b:Word;Var code:Word);
Procedure Val(const s:string;Var b:Word;Var code:Integer);
Procedure Val(const s:string;Var b:Word);
Procedure Val(const s:string;Var b:Integer;Var code:Word);
Procedure Val(const s:string;Var b:Integer;Var code:Integer);
Procedure Val(const s:string;Var b:Integer);
Procedure Val(const s:string;Var d:Real;Var code:Word);
Procedure Val(const s:string;Var d:Real;Var code:Integer);
Procedure Val(const s:string;Var d:Real);
Procedure Val(const s:string;Var d:single;Var code:Word);
Procedure Val(const s:string;Var d:single;Var code:Integer);
Procedure Val(const s:string;Var d:single);
Procedure Val(const s:string;Var d:Extended;Var code:Word);
Procedure Val(const s:string;Var d:Extended;Var code:Integer);
Procedure Val(const s:string;Var d:Extended);
Procedure Val(const s:string;Var d:comp;Var code:Word);
Procedure Val(const s:string;Var d:comp;Var code:Integer);
Procedure Val(const s:string;Var d:comp);
Procedure Val(const s:string;Var v:cardinal;Var code:Word);
Procedure Val(const s:string;Var v:cardinal;Var code:Integer);
Procedure Val(const s:string;Var v:cardinal);

{****************************************************************************
                          Untyped File Management
****************************************************************************}

Procedure Assign(Var f:File;const Name:string);
Procedure Assign(Var f:File;p:pchar);
Procedure Assign(Var f:File;c:char);
Procedure Rewrite(Var f:File;l:Word);
Procedure Rewrite(Var f:File);
Procedure Reset(Var f:File;l:Word);
Procedure Reset(Var f:File);
Procedure Close(Var f:File);
Procedure BlockWrite(Var f:File;Var Buf;Count:Longint;Var Result:Longint);
Procedure BlockWrite(Var f:File;Var Buf;Count:Word;Var Result:Word);
Procedure BlockWrite(Var f:File;Var Buf;Count:Word;Var Result:Integer);
Procedure BlockWrite(Var f:File;Var Buf;Count:Longint);
Procedure BlockRead(Var f:File;Var Buf;count:Longint;Var Result:Longint);
Procedure BlockRead(Var f:File;Var Buf;count:Word;Var Result:Word);
Procedure BlockRead(Var f:File;Var Buf;count:Word;Var Result:Integer);
Procedure BlockRead(Var f:File;Var Buf;count:Longint);
Function  FilePos(Var f:File):Longint;
Function  FileSize(Var f:File):Longint;
Procedure Seek(Var f:File;Pos:Longint);
Function  EOF(Var f:File):Boolean;
Procedure Erase(Var f:File);
Procedure Rename(Var f:File;const s:string);
Procedure Rename(Var f:File;p:pchar);
Procedure Rename(Var f:File;c:char);
Procedure Truncate (Var F:File);

{****************************************************************************
                           Typed File Management
****************************************************************************}

Procedure Assign(Var f:TypedFile;const Name:string);
Procedure Assign(Var f:TypedFile;p:pchar);
Procedure Assign(Var f:TypedFile;c:char);
Procedure Rewrite(Var f:TypedFile);
Procedure Reset(Var f:TypedFile);

{****************************************************************************
                            Text File Management
****************************************************************************}

Procedure Assign(Var t:Text;const s:string);
Procedure Assign(Var t:Text;p:pchar);
Procedure Assign(Var t:Text;c:char);
Procedure Close(Var t:Text);
Procedure Rewrite(Var t:Text);
Procedure Reset(Var t:Text);
Procedure Append(Var t:Text);
Procedure Flush(Var t:Text);
Procedure Erase(Var t:Text);
Procedure Rename(Var t:Text;const s:string);
Procedure Rename(Var t:Text;p:pchar);
Procedure Rename(Var t:Text;c:char);
Function  EOF(Var t:Text):Boolean;
Function  EOF:Boolean;
Function  EOLn(Var t:Text):Boolean;
Function  EOLn:Boolean;
Function  SeekEOLn (Var F:Text):Boolean;
Function  SeekEOF (Var F:Text):Boolean;
Function  SeekEOLn:Boolean;
Function  SeekEOF:Boolean;
Procedure SetTextBuf(Var f:Text; Var Buf);
Procedure SetTextBuf(Var f:Text; Var Buf; Size:Word);

{****************************************************************************
                            Directory Management
****************************************************************************}

Procedure chdir(const s:string);
Procedure mkdir(const s:string);
Procedure rmdir(const s:string);
Procedure getdir(drivenr:byte;Var dir:string);

{*****************************************************************************
                             Miscelleaous
*****************************************************************************}

Function IOResult:Word;
Function Sptr:Longint;

{*****************************************************************************
                          Init / Exit / ExitProc
*****************************************************************************}

Function  Paramcount:Longint;
Function  ParamStr(l:Longint):string;
Procedure Dump_Stack(bp:Longint);
Procedure RunError(w:Word);
Procedure RunError;
Procedure halt(errnum:byte);
Procedure halt;
Procedure AddExitProc(Proc:TProcedure);


{
  $Log$
  Revision 1.7  1998-05-22 12:34:11  peter
    * fixed the optimizes of daniel

  Revision 1.6  1998/05/21 19:31:00  peter
    * objects compiles for linux
    + assign(pchar), assign(char), rename(pchar), rename(char)
    * fixed read_text_as_array
    + read_text_as_pchar which was not yet in the rtl

  Revision 1.5  1998/05/12 10:42:45  peter
    * moved getopts to inc/, all supported OS's need argc,argv exported
    + strpas, strlen are now exported in the systemunit
    * removed logs
    * removed $ifdef ver_above

  Revision 1.4  1998/04/16 12:30:47  peter
    + inc(pchar), dec(pchar), incc(pchar,a),dec(pchar,a)
}