freepascal.compiler/compiler/globals.pas

{
    $Id$
    Copyright (C) 1998-2000 by Florian Klaempfl

    This unit implements some support functions and global variables

    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
    the Free Software Foundation; either version 2 of the License, or
    (at your option) any later version.

    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.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

 ****************************************************************************
}
unit globals;

{$i defines.inc}

interface

    uses
{$ifdef win32}
      windows,
{$endif}
{$ifdef unix}
  {$ifdef ver1_0}
      linux,
  {$else}
      unix,
  {$endif}
{$endif}
{$ifdef os2}
      doscalls,
{$endif}
{$ifdef Delphi}
      SysUtils,
      dmisc,
{$else}
      strings,
      dos,
{$endif}
      cutils,cclasses,
      globtype,version,systems;

    const
{$ifdef Splitheap}
       testsplit : boolean = false;
{$endif Splitheap}

       delphimodeswitches : tmodeswitches=
         [m_delphi,m_all,m_class,m_objpas,m_result,m_string_pchar,
          m_pointer_2_procedure,m_autoderef,m_tp_procvar,m_initfinal,m_default_ansistring,
          m_out,m_default_para,m_hintdirective,m_duplicate_names];
       fpcmodeswitches    : tmodeswitches=
         [m_fpc,m_all,m_string_pchar,m_nested_comment,m_repeat_forward,
          m_cvar_support,m_initfinal,m_add_pointer];
       objfpcmodeswitches : tmodeswitches=
         [m_objfpc,m_fpc,m_all,m_class,m_objpas,m_result,m_string_pchar,m_nested_comment,
          m_repeat_forward,m_cvar_support,m_initfinal,m_add_pointer,m_out,m_default_para];
       tpmodeswitches     : tmodeswitches=
         [m_tp7,m_all,m_tp_procvar,m_duplicate_names];
       gpcmodeswitches    : tmodeswitches=
         [m_gpc,m_all];

    type
       pfileposinfo = ^tfileposinfo;
       tfileposinfo = record
         line      : longint;
         column    : word;
         fileindex : word;
         { moduleindex : word; }
       end;

       TSearchPathList = class(TStringList)
         procedure AddPath(s:string;addfirst:boolean);
         procedure AddList(list:TSearchPathList;addfirst:boolean);
         function  FindFile(const f : string;var foundfile:string):boolean;
       end;

    var
       { specified inputfile }
       inputdir       : dirstr;
       inputfile      : namestr;
       inputextension : extstr;
       { specified outputfile with -o parameter }
       outputfile     : namestr;
       { specified with -FE or -FU }
       outputexedir   : dirstr;
       outputunitdir  : dirstr;

       { things specified with parameters }
       paralinkoptions,
       paradynamiclinker : string;
       parapreprocess    : boolean;

       { directory where the utils can be found (options -FD) }
       utilsdirectory : dirstr;

       { some flags for global compiler switches }
       do_build,
       do_release,
       do_make       : boolean;
       not_unit_proc : boolean;
       { path for searching units, different paths can be seperated by ; }
       exepath            : dirstr;  { Path to ppc }
       librarysearchpath,
       unitsearchpath,
       objectsearchpath,
       includesearchpath  : TSearchPathList;

       { deffile }
       usewindowapi  : boolean;
       description   : string;
       dllversion    : string;
       dllmajor,dllminor,dllrevision : word;  { revision only for netware }

       akttokenpos,                  { position of the last token }
       aktfilepos : tfileposinfo;    { current position }

       { ad 18.05.2001: Screen and Threadname for Netware }
       nwscreenname : string;
       nwthreadname : string;
       nwcopyright  : string;

       block_type : tblock_type;         { type of currently parsed block }

       in_args : boolean;                { arguments must be checked especially }
       parsing_para_level : integer;     { parameter level, used to convert
                                           proc calls to proc loads in firstcalln }
       compile_level : word;
       make_ref : boolean;
       resolving_forward : boolean;      { used to add forward reference as second ref }
       use_esp_stackframe : boolean;     { to test for call with ESP as stack frame }
       inlining_procedure : boolean;     { are we inlining a procedure }
       statement_level : integer;
       exceptblockcounter    : integer;  { each except block gets a unique number check gotos      }
       aktexceptblock        : integer;  { the exceptblock number of the current block (0 if none) }
       have_local_threadvars : boolean;  { set if a table of local threadvars-tables is present and has to be initialized }

     { commandline values }
       initdefines        : tstringlist;
       initglobalswitches : tglobalswitches;
       initmoduleswitches : tmoduleswitches;
       initlocalswitches  : tlocalswitches;
       initmodeswitches   : tmodeswitches;
       {$IFDEF testvarsets}
        Initsetalloc,                            {0=fixed, 1 =var}
       {$ENDIF}
       initpackenum       : longint;
       initalignment      : talignmentinfo;
       initoptprocessor,
       initspecificoptprocessor : tprocessors;
       initasmmode        : tasmmode;
       initinterfacetype  : tinterfacetypes;
       initoutputformat   : tasm;
       initdefproccall    : tproccalloption;

     { current state values }
       aktglobalswitches  : tglobalswitches;
       aktmoduleswitches  : tmoduleswitches;
       aktlocalswitches   : tlocalswitches;
       nextaktlocalswitches : tlocalswitches;
       localswitcheschanged : boolean;
       aktmodeswitches    : tmodeswitches;
       {$IFDEF testvarsets}
        aktsetalloc,
       {$ENDIF}
       aktpackenum        : longint;
       aktmaxfpuregisters : longint;
       aktalignment       : talignmentinfo;
       aktoptprocessor,
       aktspecificoptprocessor : tprocessors;
       aktasmmode         : tasmmode;
       aktinterfacetype   : tinterfacetypes;
       aktoutputformat    : tasm;
       aktdefproccall     : tproccalloption;

     { Memory sizes }
       heapsize,
       maxheapsize,
       stacksize    : longint;

{$Ifdef EXTDEBUG}
       total_of_firstpass,
       firstpass_several : longint;
{$ifdef FPC}
       EntryMemUsed : longint;
{$endif FPC}
     { parameter switches }
       debugstop : boolean;
{$EndIf EXTDEBUG}
       { windows / OS/2 application type }
       apptype : tapptype;

    const
       RelocSection : boolean = true;
       RelocSectionSetExplicitly : boolean = false;
       LinkTypeSetExplicitly : boolean = false;
       DLLsource : boolean = false;
       DLLImageBase : pstring = nil;
       UseDeffileForExport : boolean = true;
       ForceDeffileForExport : boolean = false;

       { used to set all registers used for each global function
         this should dramatically decrease the number of
         recompilations needed PM }
       simplify_ppu : boolean = true;

       { should we allow non static members ? }
       allow_only_static : boolean = false;

       Inside_asm_statement : boolean = false;

       global_unit_count : word = 0;

       { for error info in pp.pas }
       parser_current_file : string = '';

{$ifdef m68k}
       { PalmOS resources }
       palmos_applicationname : string = 'FPC Application';
       palmos_applicationid : string[4] = 'FPCA';
{$endif m68k}


    procedure abstract;

    function bstoslash(const s : string) : string;

    function getdatestr:string;
    function gettimestr:string;
    function filetimestring( t : longint) : string;

    procedure DefaultReplacements(var s:string);
    function  GetCurrentDir:string;
    function  path_absolute(const s : string) : boolean;
    Function  PathExists ( F : String) : Boolean;
    Function  FileExists ( Const F : String) : Boolean;
    Function  RemoveFile(const f:string):boolean;
    Function  RemoveDir(d:string):boolean;
    Function  GetFileTime ( Var F : File) : Longint;
    Function  GetNamedFileTime ( Const F : String) : Longint;
    Function  SplitPath(const s:string):string;
    Function  SplitFileName(const s:string):string;
    Function  SplitName(const s:string):string;
    Function  SplitExtension(Const HStr:String):String;
    Function  AddExtension(Const HStr,ext:String):String;
    Function  ForceExtension(Const HStr,ext:String):String;
    Function  FixPath(s:string;allowdot:boolean):string;
    function  FixFileName(const s:string):string;
    function  TargetFixPath(s:string;allowdot:boolean):string;
    function  TargetFixFileName(const s:string):string;
    procedure SplitBinCmd(const s:string;var bstr,cstr:string);
    function  FindFile(const f : string;path : string;var foundfile:string):boolean;
    function  FindExe(const bin:string;var foundfile:string):boolean;
    function  GetShortName(const n:string):string;

    Procedure Shell(const command:string);
    function  GetEnvPChar(const envname:string):pchar;
    procedure FreeEnvPChar(p:pchar);

    Function SetCompileMode(const s:string; changeInit: boolean):boolean;
    function SetAktProcCall(const s:string; changeInit: boolean):boolean;

    procedure InitGlobals;
    procedure DoneGlobals;

    function  string2guid(const s: string; var GUID: TGUID): boolean;
    function  guid2string(const GUID: TGUID): string;

    function UpdateAlignmentStr(s:string;var a:talignmentinfo):boolean;


implementation

    uses
      comphook;

    procedure abstract;
      begin
        do_internalerror(255);
      end;


    function bstoslash(const s : string) : string;
    {
      return string s with all \ changed into /
    }
      var
         i : longint;
      begin
        for i:=1to length(s) do
         if s[i]='\' then
          bstoslash[i]:='/'
         else
          bstoslash[i]:=s[i];
         bstoslash[0]:=s[0];
      end;


{****************************************************************************
                               Time Handling
****************************************************************************}

    Function L0(l:longint):string;
    {
      return the string of value l, if l<10 then insert a zero, so
      the string is always at least 2 chars '01','02',etc
    }
      var
        s : string;
      begin
        Str(l,s);
        if l<10 then
         s:='0'+s;
        L0:=s;
      end;


   function gettimestr:string;
   {
     get the current time in a string HH:MM:SS
   }
      var
        hour,min,sec,hsec : word;
      begin
{$ifdef delphi}
        dmisc.gettime(hour,min,sec,hsec);
{$else delphi}
        dos.gettime(hour,min,sec,hsec);
{$endif delphi}
        gettimestr:=L0(Hour)+':'+L0(min)+':'+L0(sec);
      end;


   function getdatestr:string;
   {
     get the current date in a string YY/MM/DD
   }
      var
        Year,Month,Day,Wday : Word;
      begin
{$ifdef delphi}
        dmisc.getdate(year,month,day,wday);
{$else}
        dos.getdate(year,month,day,wday);
{$endif}
        getdatestr:=L0(Year)+'/'+L0(Month)+'/'+L0(Day);
      end;


   function  filetimestring( t : longint) : string;
   {
     convert dos datetime t to a string YY/MM/DD HH:MM:SS
   }
     var
       DT : DateTime;
     begin
       if t=-1 then
        begin
          FileTimeString:='Not Found';
          exit;
        end;
       unpacktime(t,DT);
       filetimestring:=L0(dt.Year)+'/'+L0(dt.Month)+'/'+L0(dt.Day)+' '+L0(dt.Hour)+':'+L0(dt.min)+':'+L0(dt.sec);
     end;


{****************************************************************************
                          Default Macro Handling
****************************************************************************}

     procedure DefaultReplacements(var s:string);
       begin
         { Replace some macro's }
         Replace(s,'$FPCVER',version_string);
         Replace(s,'$VERSION',version_string);
         Replace(s,'$FULLVERSION',full_version_string);
         Replace(s,'$FPCDATE',date_string);
         Replace(s,'$FPCTARGET',target_cpu_string);
         Replace(s,'$FPCCPU',target_cpu_string);
         Replace(s,'$TARGET',target_path);
         Replace(s,'$FPCOS',target_path);
       end;


{****************************************************************************
                               File Handling
****************************************************************************}

   function GetCurrentDir:string;
     var
       CurrentDir : string;
     begin
       GetDir(0,CurrentDir);
       GetCurrentDir:=FixPath(CurrentDir,false);
     end;


   function path_absolute(const s : string) : boolean;
   {
     is path s an absolute path?
   }
     begin
        path_absolute:=false;
{$ifdef unix}
        if (length(s)>0) and (s[1]='/') then
          path_absolute:=true;
{$else unix}
  {$ifdef amiga}
        if ((length(s)>0) and ((s[1]='\') or (s[1]='/'))) or (Pos(':',s) = length(s)) then
          path_absolute:=true;
  {$else}
        if ((length(s)>0) and ((s[1]='\') or (s[1]='/'))) or
           ((length(s)>2) and (s[2]=':') and ((s[3]='\') or (s[3]='/'))) then
          path_absolute:=true;
  {$endif amiga}
{$endif unix}
     end;

{$ifndef FPC}
    Procedure FindClose(var Info : SearchRec);
      Begin
      End;
{$endif not FPC}


    Function FileExists ( Const F : String) : Boolean;
{$ifndef delphi}
      Var
         Info : SearchRec;
{$endif}
      begin
{$ifdef delphi}
        FileExists:=sysutils.FileExists(f);
{$else}
        findfirst(F,readonly+archive+hidden,info);
        FileExists:=(doserror=0);
        findclose(Info);
{$endif delphi}
      end;


    Function PathExists ( F : String) : Boolean;
      Var
        Info : SearchRec;
{$ifdef i386}
        disk : byte;
{$endif i386}
      begin
{$ifdef i386}
        if (Length(f)=3) and (F[2]=':') and (F[3] in ['/','\']) then
          begin
            if F[1] in ['A'..'Z'] then
              disk:=ord(F[1])-ord('A')+1
            else if F[1] in ['a'..'z'] then
              disk:=ord(F[1])-ord('a')+1
            else
              disk:=255;
            if disk=255 then
              PathExists:=false
            else
              PathExists:=(DiskSize(disk)<>-1);
            exit;
          end;
{$endif i386}
        if F[Length(f)] in ['/','\'] then
         Delete(f,length(f),1);
        findfirst(F,readonly+archive+hidden+directory,info);
        PathExists:=(doserror=0) and ((info.attr and directory)=directory);
        findclose(Info);
      end;


    Function RemoveFile(const f:string):boolean;
      var
        g : file;
      begin
        assign(g,f);
        {$I-}
         erase(g);
        {$I+}
        RemoveFile:=(ioresult=0);
      end;


    Function RemoveDir(d:string):boolean;
      begin
        if d[length(d)]=source_info.DirSep then
         Delete(d,length(d),1);
        {$I-}
         rmdir(d);
        {$I+}
        RemoveDir:=(ioresult=0);
      end;


    Function SplitPath(const s:string):string;
      var
        i : longint;
      begin
        i:=Length(s);
        while (i>0) and not(s[i] in ['/','\']) do
         dec(i);
        SplitPath:=Copy(s,1,i);
      end;


    Function SplitFileName(const s:string):string;
      var
        p : dirstr;
        n : namestr;
        e : extstr;
      begin
        FSplit(s,p,n,e);
        SplitFileName:=n+e;
      end;


    Function SplitName(const s:string):string;
      var
        i,j : longint;
      begin
        i:=Length(s);
        j:=Length(s);
        while (i>0) and not(s[i] in ['/','\']) do
         dec(i);
        while (j>0) and (s[j]<>'.') do
         dec(j);
        if j<=i then
         j:=255;
        SplitName:=Copy(s,i+1,j-(i+1));
      end;


    Function SplitExtension(Const HStr:String):String;
      var
        j : longint;
      begin
        j:=length(Hstr);
        while (j>0) and (Hstr[j]<>'.') do
         begin
           if hstr[j]=source_info.DirSep then
            j:=0
           else
            dec(j);
         end;
        if j=0 then
         j:=254;
        SplitExtension:=Copy(Hstr,j,255);
      end;


    Function AddExtension(Const HStr,ext:String):String;
      begin
        if (Ext<>'') and (SplitExtension(HStr)='') then
         AddExtension:=Hstr+Ext
        else
         AddExtension:=Hstr;
      end;


    Function ForceExtension(Const HStr,ext:String):String;
      var
        j : longint;
      begin
        j:=length(Hstr);
        while (j>0) and (Hstr[j]<>'.') do
         dec(j);
        if j=0 then
         j:=255;
        ForceExtension:=Copy(Hstr,1,j-1)+Ext;
      end;


    Function FixPath(s:string;allowdot:boolean):string;
      var
        i : longint;
      begin
        { Fix separator }
        for i:=1 to length(s) do
         if s[i] in ['/','\'] then
          s[i]:=source_info.DirSep;
        { Fix ending / }
        if (length(s)>0) and (s[length(s)]<>source_info.DirSep) and
           (s[length(s)]<>':') then
         s:=s+source_info.DirSep;
        { Remove ./ }
        if (not allowdot) and (s='.'+source_info.DirSep) then
         s:='';
        { return }
        if source_info.files_case_relevent then
         FixPath:=s
        else
         FixPath:=Lower(s);
      end;


   function FixFileName(const s:string):string;
     var
       i      : longint;
     begin
       if source_info.files_case_relevent then
        begin
          for i:=1 to length(s) do
           begin
             case s[i] of
               '/','\' :
                 FixFileName[i]:=source_info.dirsep;
               else
                 FixFileName[i]:=s[i];
             end;
           end;
        end
       else
        begin
          for i:=1 to length(s) do
           begin
             case s[i] of
               '/','\' :
                  FixFileName[i]:=source_info.dirsep;
               'A'..'Z' :
                  FixFileName[i]:=char(byte(s[i])+32);
                else
                  FixFileName[i]:=s[i];
             end;
           end;
        end;
       FixFileName[0]:=s[0];
     end;


    Function TargetFixPath(s:string;allowdot:boolean):string;
      var
        i : longint;
      begin
        { Fix separator }
        for i:=1 to length(s) do
         if s[i] in ['/','\'] then
          s[i]:=target_info.DirSep;
        { Fix ending / }
        if (length(s)>0) and (s[length(s)]<>target_info.DirSep) and
           (s[length(s)]<>':') then
         s:=s+target_info.DirSep;
        { Remove ./ }
        if (not allowdot) and (s='.'+target_info.DirSep) then
         s:='';
        { return }
        if target_info.files_case_relevent then
         TargetFixPath:=s
        else
         TargetFixPath:=Lower(s);
      end;


   function TargetFixFileName(const s:string):string;
     var
       i      : longint;
     begin
       if target_info.files_case_relevent then
        begin
          for i:=1 to length(s) do
           begin
             case s[i] of
               '/','\' :
                 TargetFixFileName[i]:=target_info.dirsep;
               else
                 TargetFixFileName[i]:=s[i];
             end;
           end;
        end
       else
        begin
          for i:=1 to length(s) do
           begin
             case s[i] of
               '/','\' :
                  TargetFixFileName[i]:=target_info.dirsep;
               'A'..'Z' :
                  TargetFixFileName[i]:=char(byte(s[i])+32);
                else
                  TargetFixFileName[i]:=s[i];
             end;
           end;
        end;
       TargetFixFileName[0]:=s[0];
     end;


   procedure SplitBinCmd(const s:string;var bstr,cstr:string);
     var
       i : longint;
     begin
       i:=pos(' ',s);
       if i>0 then
        begin
          bstr:=Copy(s,1,i-1);
          cstr:=Copy(s,i+1,length(s)-i);
        end
       else
        begin
          bstr:=s;
          cstr:='';
        end;
     end;



   procedure TSearchPathList.AddPath(s:string;addfirst:boolean);
     var
       j        : longint;
       hs,hsd,
       CurrentDir,
       CurrPath : string;
       dir      : searchrec;
       hp       : TStringListItem;

       procedure addcurrpath;
       begin
         if addfirst then
          begin
            Remove(currPath);
            Insert(currPath);
          end
         else
          begin
            { Check if already in path, then we don't add it }
            hp:=Find(currPath);
            if not assigned(hp) then
             Concat(currPath);
          end;
       end;

     begin
       if s='' then
        exit;
     { Support default macro's }
       DefaultReplacements(s);
     { get current dir }
       CurrentDir:=GetCurrentDir;
       repeat
         { get currpath }
         if addfirst then
          begin
            j:=length(s);
            while (j>0) and (s[j]<>';') do
             dec(j);
            CurrPath:=FixPath(Copy(s,j+1,length(s)-j),false);
            if j=0 then
             s:=''
            else
             System.Delete(s,j,length(s)-j+1);
          end
         else
          begin
            j:=Pos(';',s);
            if j=0 then
             j:=255;
            CurrPath:=FixPath(Copy(s,1,j-1),false);
            System.Delete(s,1,j);
          end;
         { fix pathname }
         if CurrPath='' then
          CurrPath:='.'+source_info.DirSep
         else
          begin
            CurrPath:=FixPath(FExpand(CurrPath),false);
            if (CurrentDir<>'') and (Copy(CurrPath,1,length(CurrentDir))=CurrentDir) then
             CurrPath:='.'+source_info.DirSep+Copy(CurrPath,length(CurrentDir)+1,255);
          end;
         { wildcard adding ? }
         if pos('*',currpath)>0 then
          begin
            if currpath[length(currpath)]=source_info.dirsep then
             hs:=Copy(currpath,1,length(CurrPath)-1)
            else
             hs:=currpath;
            hsd:=SplitPath(hs);
            findfirst(hs,directory,dir);
            while doserror=0 do
             begin
               if (dir.name<>'.') and
                  (dir.name<>'..') and
                  ((dir.attr and directory)<>0) then
                begin
                  currpath:=hsd+dir.name+source_info.dirsep;
                  hp:=Find(currPath);
                  if not assigned(hp) then
                   AddCurrPath;
                end;
               findnext(dir);
             end;
            FindClose(dir);
          end
         else
          begin
            if PathExists(currpath) then
             addcurrpath;
          end;
       until (s='');
     end;


   procedure TSearchPathList.AddList(list:TSearchPathList;addfirst:boolean);
     var
       s : string;
       hl : TSearchPathList;
       hp,hp2 : TStringListItem;
     begin
       if list.empty then
        exit;
       { create temp and reverse the list }
       if addfirst then
        begin
          hl:=TSearchPathList.Create;
          hp:=TStringListItem(list.first);
          while assigned(hp) do
           begin
             hl.insert(hp.Str);
             hp:=TStringListItem(hp.next);
           end;
          while not hl.empty do
           begin
             s:=hl.GetFirst;
             Remove(s);
             Insert(s);
           end;
          hl.Free;
        end
       else
        begin
          hp:=TStringListItem(list.first);
          while assigned(hp) do
           begin
             hp2:=Find(hp.Str);
             { Check if already in path, then we don't add it }
             if not assigned(hp2) then
              Concat(hp.Str);
             hp:=TStringListItem(hp.next);
           end;
        end;
     end;


   function TSearchPathList.FindFile(const f : string;var foundfile:string):boolean;
     Var
       p : TStringListItem;
     begin
       FindFile:=false;
       p:=TStringListItem(first);
       while assigned(p) do
        begin
          {
            Search order for case sensitive systems:
             1. lowercase
             2. NormalCase
             3. UPPERCASE
            None case sensitive only lowercase
          }
          FoundFile:=p.Str+Lower(f);
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
{$ifdef UNIX}
          FoundFile:=p.Str+f;
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
          FoundFile:=p.Str+Upper(f);
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
{$endif UNIX}
          p:=TStringListItem(p.next);
        end;
       { Return original filename if not found }
       FoundFile:=f;
     end;


   Function GetFileTime ( Var F : File) : Longint;
     Var
     {$ifdef unix}
       Info : Stat;
     {$endif}
       L : longint;
     begin
     {$ifdef unix}
       FStat (F,Info);
       L:=Info.Mtime;
     {$else}
       GetFTime(f,l);
     {$endif}
       GetFileTime:=L;
     end;


   Function GetNamedFileTime (Const F : String) : Longint;
     begin
       GetNamedFileTime:=do_getnamedfiletime(F);
     end;


   function FindFile(const f : string;path : string;var foundfile:string):boolean;
      Var
        singlepathstring : string;
        i : longint;
     begin
{$ifdef Unix}
       for i:=1 to length(path) do
        if path[i]=':' then
         path[i]:=';';
{$endif Unix}
       FindFile:=false;
       repeat
          i:=pos(';',path);
          if i=0 then
           i:=256;
          singlepathstring:=FixPath(copy(path,1,i-1),false);
          delete(path,1,i);
          {
            Search order for case sensitive systems:
             1. lowercase
             2. NormalCase
             3. UPPERCASE
            None case sensitive only lowercase
          }
          FoundFile:=singlepathstring+Lower(f);
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
{$ifdef UNIX}
          FoundFile:=singlepathstring+f;
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
          FoundFile:=singlepathstring+Upper(f);
          If FileExists(FoundFile) then
           begin
             FindFile:=true;
             exit;
           end;
{$endif UNIX}
       until path='';
       FoundFile:=f;
     end;


   function  FindExe(const bin:string;var foundfile:string):boolean;
     begin
{$ifdef delphi}
       FindExe:=FindFile(FixFileName(AddExtension(bin,source_info.exeext)),'.;'+exepath+';'+dmisc.getenv('PATH'),foundfile);
{$else delphi}
       FindExe:=FindFile(FixFileName(AddExtension(bin,source_info.exeext)),'.;'+exepath+';'+dos.getenv('PATH'),foundfile);
{$endif delphi}
     end;


    function GetShortName(const n:string):string;
{$ifdef win32}
      var
        hs,hs2 : string;
        i : longint;
{$endif}
{$ifdef go32v2}
      var
        hs : string;
{$endif}
      begin
        GetShortName:=n;
{$ifdef win32}
        hs:=n+#0;
        i:=Windows.GetShortPathName(@hs[1],@hs2[1],high(hs2));
        if (i>0) and (i<=high(hs2)) then
          begin
            hs2[0]:=chr(strlen(@hs2[1]));
            GetShortName:=hs2;
          end;
{$endif}
{$ifdef go32v2}
        hs:=n;
        if Dos.GetShortName(hs) then
         GetShortName:=hs;
{$endif}
      end;


 {****************************************************************************
                               OS Dependent things
 ****************************************************************************}

    function GetEnvPChar(const envname:string):pchar;
      {$ifdef win32}
      var
        s     : string;
        i,len : longint;
        hp,p,p2 : pchar;
      {$endif}
      {$ifdef os2}
      var
        P1, P2: PChar;
      {$endif}
      begin
      {$ifdef unix}
        GetEnvPchar:={$ifdef ver1_0}Linux{$else}Unix{$endif}.Getenv(envname);
        {$define GETENVOK}
      {$endif}
      {$ifdef win32}
        GetEnvPchar:=nil;
        p:=GetEnvironmentStrings;
        hp:=p;
        while hp^<>#0 do
         begin
           s:=strpas(hp);
           i:=pos('=',s);
           len:=strlen(hp);
           if upper(copy(s,1,i-1))=upper(envname) then
            begin
              GetMem(p2,len-length(envname));
              Move(hp[i],p2^,len-length(envname));
              GetEnvPchar:=p2;
              break;
            end;
           { next string entry}
           hp:=hp+len+1;
         end;
        FreeEnvironmentStrings(p);
        {$define GETENVOK}
      {$endif}
      {$ifdef os2}
        P1 := StrPNew (EnvName);
        if Assigned (P1) then
        begin
         if DosCalls.DosScanEnv (P1, P2) = 0 then
          GetEnvPChar := P2
         else
          GetEnvPChar := nil;
         StrDispose (P1);
        end else GetEnvPChar := nil;
        {$define GETENVOK}
      {$endif}
      {$ifdef GETENVOK}
        {$undef GETENVOK}
      {$else}
        GetEnvPchar:=StrPNew({$ifdef delphi}DMisc{$else}Dos{$endif}.Getenv(envname));
      {$endif}
      end;


    procedure FreeEnvPChar(p:pchar);
      begin
      {$ifndef unix}
       {$ifndef os2}
        StrDispose(p);
       {$endif}
      {$endif}
      end;


    Procedure Shell(const command:string);
      { This is already defined in the linux.ppu for linux, need for the *
        expansion under linux }
      {$ifdef unix}
      begin
        {$ifdef ver1_0}Linux{$else}Unix{$endif}.Shell(command);
      end;
      {$else}
      var
        comspec : string;
      begin
        comspec:=getenv('COMSPEC');
        Exec(comspec,' /C '+command);
      end;
      {$endif}


    Function SetCompileMode(const s:string; changeInit: boolean):boolean;
      var
        b : boolean;
      begin
        b:=true;
        if s='DEFAULT' then
          aktmodeswitches:=initmodeswitches
        else
         if s='DELPHI' then
          aktmodeswitches:=delphimodeswitches
        else
         if s='TP' then
          aktmodeswitches:=tpmodeswitches
        else
         if s='FPC' then
          aktmodeswitches:=fpcmodeswitches
        else
         if s='OBJFPC' then
          aktmodeswitches:=objfpcmodeswitches
        else
         if s='GPC' then
          aktmodeswitches:=gpcmodeswitches
        else
         b:=false;

        if b and changeInit then
          initmodeswitches := aktmodeswitches;

        if b then
         begin
           { turn ansistrings on by default ? }
           if (m_delphi in aktmodeswitches) then
            begin
              include(aktlocalswitches,cs_ansistrings);
              if changeinit then
               include(initlocalswitches,cs_ansistrings);
            end
           else
            begin
              exclude(aktlocalswitches,cs_ansistrings);
              if changeinit then
               exclude(initlocalswitches,cs_ansistrings);
            end;
           { enum packing }
           if (m_tp7 in aktmodeswitches) then
            aktpackenum:=1
           else
            aktpackenum:=4;
           if changeinit then
            initpackenum:=aktpackenum;
         end;

        SetCompileMode:=b;
      end;


    function SetAktProcCall(const s:string; changeInit:boolean):boolean;
      const
        DefProcCallName : array[tproccalloption] of string[12] = ('',
         'CDECL',
         'CPPDECL',
         '', { compilerproc }
         'FAR16',
         'FPCCALL',
         'INLINE',
         '', { internconst }
         '', { internproc }
         '', { palmossyscall }
         'PASCAL',
         'REGISTER',
         'SAFECALL',
         'STDCALL',
         'SYSTEM'
        );
      var
        t : tproccalloption;
      begin
        SetAktProcCall:=false;
        for t:=low(tproccalloption) to high(tproccalloption) do
         if DefProcCallName[t]=s then
          begin
            AktDefProcCall:=t;
            SetAktProcCall:=true;
            break;
          end;
        if changeinit then
         InitDefProcCall:=AktDefProcCall;
      end;



    { '('D1:'00000000-'D2:'0000-'D3:'0000-'D4:'0000-000000000000)' }
    function string2guid(const s: string; var GUID: TGUID): boolean;
        function ishexstr(const hs: string): boolean;
          var
            i: integer;
          begin
            ishexstr:=false;
            for i:=1 to Length(hs) do begin
              if not (hs[i] in ['0'..'9','A'..'F','a'..'f']) then
                exit;
            end;
            ishexstr:=true;
          end;
        function hexstr2longint(const hexs: string): longint;
          var
            i: integer;
            rl: longint;
          begin
            rl:=0;
            for i:=1 to length(hexs) do begin
              rl:=rl shl 4;
              case hexs[i] of
                '0'..'9' : inc(rl,ord(hexs[i])-ord('0'));
                'A'..'F' : inc(rl,ord(hexs[i])-ord('A')+10);
                'a'..'f' : inc(rl,ord(hexs[i])-ord('a')+10);
              end
            end;
            hexstr2longint:=rl;
          end;
      var
        i: integer;
      begin
        if (Length(s)=38) and (s[1]='{') and (s[38]='}') and
           (s[10]='-') and (s[15]='-') and (s[20]='-') and (s[25]='-') and
           ishexstr(copy(s,2,8)) and ishexstr(copy(s,11,4)) and
           ishexstr(copy(s,16,4)) and ishexstr(copy(s,21,4)) and
           ishexstr(copy(s,26,12)) then begin
          GUID.D1:=dword(hexstr2longint(copy(s,2,8)));
          GUID.D2:=hexstr2longint(copy(s,11,4));
          GUID.D3:=hexstr2longint(copy(s,16,4));
          for i:=0 to 1 do
            GUID.D4[i]:=hexstr2longint(copy(s,21+i*2,2));
          for i:=2 to 7 do
            GUID.D4[i]:=hexstr2longint(copy(s,22+i*2,2));
          string2guid:=true;
        end
        else
          string2guid:=false;
      end;

    function guid2string(const GUID: TGUID): string;
        function long2hex(l, len: longint): string;
          const
            hextbl: array[0..15] of char = '0123456789ABCDEF';
          var
            rs: string;
            i: integer;
          begin
            rs[0]:=chr(len);
            for i:=len downto 1 do begin
              rs[i]:=hextbl[l and $F];
              l:=l shr 4;
            end;
            long2hex:=rs;
          end;
      begin
        guid2string:=
          '{'+long2hex(GUID.D1,8)+
          '-'+long2hex(GUID.D2,4)+
          '-'+long2hex(GUID.D3,4)+
          '-'+long2hex(GUID.D4[0],2)+long2hex(GUID.D4[1],2)+
          '-'+long2hex(GUID.D4[2],2)+long2hex(GUID.D4[3],2)+
              long2hex(GUID.D4[4],2)+long2hex(GUID.D4[5],2)+
              long2hex(GUID.D4[6],2)+long2hex(GUID.D4[7],2)+
          '}';
      end;


    function UpdateAlignmentStr(s:string;var a:talignmentinfo):boolean;
      var
        tok  : string;
        vstr : string;
        l    : longint;
        code : integer;
        b    : talignmentinfo;
      begin
        UpdateAlignmentStr:=true;
        uppervar(s);
        fillchar(b,sizeof(b),0);
        repeat
          tok:=GetToken(s,'=');
          if tok='' then
           break;
          vstr:=GetToken(s,',');
          val(vstr,l,code);
          if tok='PROC' then
           b.procalign:=l
          else if tok='JUMP' then
           b.jumpalign:=l
          else if tok='LOOP' then
           b.loopalign:=l
          else if tok='CONSTMIN' then
           b.constalignmin:=l
          else if tok='CONSTMAX' then
           b.constalignmax:=l
          else if tok='VARMIN' then
           b.varalignmin:=l
          else if tok='VARMAX' then
           b.varalignmax:=l
          else if tok='LOCALMIN' then
           b.localalignmin:=l
          else if tok='LOCALMAX' then
           b.localalignmax:=l
          else if tok='RECORDMIN' then
           b.recordalignmin:=l
          else if tok='RECORDMAX' then
           b.recordalignmax:=l
          else if tok='PARAALIGN' then
           b.paraalign:=l
          else { Error }
           UpdateAlignmentStr:=false;
        until false;
        UpdateAlignment(a,b);
      end;

{****************************************************************************
                                    Init
****************************************************************************}

{$ifdef unix}
  {$define need_path_search}
{$endif unix}
{$ifdef os2}
  {$define need_path_search}
{$endif os2}

   procedure get_exepath;
     var
       hs1 : namestr;
       hs2 : extstr;
     begin
{$ifdef delphi}
       exepath:=dmisc.getenv('PPC_EXEC_PATH');
{$else delphi}
       exepath:=dos.getenv('PPC_EXEC_PATH');
{$endif delphi}
       if exepath='' then
        fsplit(FixFileName(system.paramstr(0)),exepath,hs1,hs2);
{$ifdef need_path_search}
       if exepath='' then
        begin
          if pos(source_info.exeext,hs1) <>
               (length(hs1) - length(source_info.exeext)+1) then
            hs1 := hs1 + source_info.exeext;
      {$ifdef delphi}
          findfile(hs1,dmisc.getenv('PATH'),exepath);
      {$else delphi}
          findfile(hs1,dos.getenv('PATH'),exepath);
      {$endif delphi}
          exepath:=SplitPath(exepath);
        end;
{$endif need_path_search}
       exepath:=FixPath(exepath,false);
     end;



   procedure DoneGlobals;
     begin
       initdefines.free;
       if assigned(DLLImageBase) then
         StringDispose(DLLImageBase);
       RelocSection:=true;
       RelocSectionSetExplicitly:=false;
       UseDeffileForExport:=true;
       librarysearchpath.Free;
       unitsearchpath.Free;
       objectsearchpath.Free;
       includesearchpath.Free;
     end;

   procedure InitGlobals;
     begin
        get_exepath;

      { reset globals }
        do_build:=false;
        do_release:=false;
        do_make:=true;
        compile_level:=0;
        DLLsource:=false;
        inlining_procedure:=false;
        resolving_forward:=false;
        in_args:=false;
        make_ref:=false;

      { Output }
        OutputFile:='';
        OutputExeDir:='';
        OutputUnitDir:='';

      { Utils directory }
        utilsdirectory:='';

      { Search Paths }
        librarysearchpath:=TSearchPathList.Create;
        unitsearchpath:=TSearchPathList.Create;
        includesearchpath:=TSearchPathList.Create;
        objectsearchpath:=TSearchPathList.Create;

      { Def file }
        usewindowapi:=false;
        description:='Compiled by FPC '+version_string+' - '+target_cpu_string;
        dllversion:='';
        nwscreenname := '';
        nwthreadname := '';
        nwcopyright  := '';

      { Init values }
        initmodeswitches:=fpcmodeswitches;
        initlocalswitches:=[cs_check_io,cs_typed_const_writable];
        initmoduleswitches:=[cs_extsyntax,cs_browser];
        initglobalswitches:=[cs_check_unit_name,cs_link_static];
        initoutputformat:=target_asm.id;
        fillchar(initalignment,sizeof(talignmentinfo),0);
{$ifdef i386}
        initoptprocessor:=Class386;
        initspecificoptprocessor:=Class386;
        initpackenum:=4;
        {$IFDEF testvarsets}
        initsetalloc:=0;
        {$ENDIF}
        initasmmode:=asmmode_i386_att;
{$else not i386}
  {$ifdef m68k}
        initoptprocessor:=MC68000;
        include(initmoduleswitches,cs_fp_emulation);
        initpackenum:=4;
        {$IFDEF testvarsets}
         initsetalloc:=0;
        {$ENDIF}
        initasmmode:=asmmode_m68k_mot;
  {$endif m68k}
{$endif i386}
        initinterfacetype:=it_interfacecom;
        initdefproccall:=pocall_none;
        initdefines:=TStringList.Create;

      { memory sizes, will be overriden by parameter or default for target
        in options or init_parser }
        stacksize:=0;
        heapsize:=0;
        maxheapsize:=0;

      { compile state }
        in_args:=false;
        { must_be_valid:=true; obsolete PM }
        not_unit_proc:=true;

        apptype:=app_cui;

        have_local_threadvars := false;
     end;

{$ifdef EXTDEBUG}
begin
  {$ifdef FPC}
    EntryMemUsed:=system.HeapSize-MemAvail;
  {$endif FPC}
{$endif}
end.
{
  $Log$
  Revision 1.53  2002-04-02 17:11:28  peter
    * tlocation,treference update
    * LOC_CONSTANT added for better constant handling
    * secondadd splitted in multiple routines
    * location_force_reg added for loading a location to a register
      of a specified size
    * secondassignment parses now first the right and then the left node
      (this is compatible with Kylix). This saves a lot of push/pop especially
      with string operations
    * adapted some routines to use the new cg methods

  Revision 1.52  2002/03/28 16:07:52  armin
  + initialize threadvars defined local in units

  Revision 1.51  2002/01/24 18:25:48  peter
   * implicit result variable generation for assembler routines
   * removed m_tp modeswitch, use m_tp7 or not(m_fpc) instead

  Revision 1.50  2001/12/06 17:57:33  florian
    + parasym to tparaitem added

  Revision 1.49  2001/10/25 21:22:32  peter
    * calling convention rewrite

  Revision 1.48  2001/10/23 21:49:42  peter
    * $calling directive and -Cc commandline patch added
      from Pavel Ozerski

  Revision 1.47  2001/10/21 12:33:05  peter
    * array access for properties added

  Revision 1.46  2001/10/20 20:30:20  peter
    * read only typed const support, switch $J-

  Revision 1.45  2001/10/16 15:10:34  jonas
    * fixed goto/label/try bugs

  Revision 1.44  2001/10/12 16:06:17  peter
    * pathexists fix (merged)

  Revision 1.43  2001/09/18 11:30:47  michael
  * Fixes win32 linking problems with import libraries
  * LINKLIB Libraries are now looked for using C file extensions
  * get_exepath fix

  Revision 1.42  2001/09/17 21:29:11  peter
    * merged netbsd, fpu-overflow from fixes branch

  Revision 1.41  2001/08/19 11:22:22  peter
    * palmos support from v10 merged

  Revision 1.40  2001/08/04 10:23:54  peter
    * updates so it works with the ide

  Revision 1.39  2001/07/01 20:16:15  peter
    * alignmentinfo record added
    * -Oa argument supports more alignment settings that can be specified
      per type: PROC,LOOP,VARMIN,VARMAX,CONSTMIN,CONSTMAX,RECORDMIN
      RECORDMAX,LOCALMIN,LOCALMAX. It is possible to set the mimimum
      required alignment and the maximum usefull alignment. The final
      alignment will be choosen per variable size dependent on these
      settings

  Revision 1.38  2001/06/18 20:36:24  peter
    * -Ur switch (merged)
    * masm fixes (merged)
    * quoted filenames for go32v2 and win32

  Revision 1.37  2001/06/03 21:57:35  peter
    + hint directive parsing support

  Revision 1.36  2001/06/03 20:21:08  peter
    * Kylix fixes, mostly case names of units

  Revision 1.35  2001/05/30 21:35:48  peter
    * netware patches for copyright, screenname, threadname directives

  Revision 1.34  2001/05/12 12:11:31  peter
    * simplify_ppu is now the default, a recompile of the compiler now
      only compiles pp.pas

  Revision 1.33  2001/05/06 14:49:17  peter
    * ppu object to class rewrite
    * move ppu read and write stuff to fppu

  Revision 1.32  2001/04/18 22:01:53  peter
    * registration of targets and assemblers

  Revision 1.31  2001/04/15 09:48:29  peter
    * fixed crash in labelnode
    * easier detection of goto and label in try blocks

  Revision 1.30  2001/04/13 01:22:07  peter
    * symtable change to classes
    * range check generation and errors fixed, make cycle DEBUG=1 works
    * memory leaks fixed

  Revision 1.29  2001/04/04 21:30:42  florian
    * applied several fixes to get the DD8 Delphi Unit compiled
     e.g. "forward"-interfaces are working now

  Revision 1.28  2001/02/20 21:41:16  peter
    * new fixfilename, findfile for unix. Look first for lowercase, then
      NormalCase and last for UPPERCASE names.

  Revision 1.27  2001/02/09 23:05:45  peter
    * default packenum=1 for tp7 mode

  Revision 1.26  2001/02/05 20:47:00  peter
    * support linux unit for ver1_0 compilers

  Revision 1.25  2001/01/21 20:32:45  marco
   * Renamefest. Compiler part. Not that hard.

  Revision 1.24  2001/01/20 18:32:52  hajny
    + APPTYPE support under OS/2, app_fs, GetEnvPChar for OS/2

  Revision 1.23  2001/01/13 00:03:41  peter
    * fixed findexe to also support already extension in name

  Revision 1.22  2000/12/26 15:57:25  peter
    * use system.paramstr()

  Revision 1.21  2000/12/25 00:07:26  peter
    + new tlinkedlist class (merge of old tstringqueue,tcontainer and
      tlinkedlist objects)

  Revision 1.20  2000/11/13 15:26:12  marco
   * Renamefest

  Revision 1.19  2000/11/12 22:20:37  peter
    * create generic toutputsection for binary writers

  Revision 1.18  2000/11/04 14:25:19  florian
    + merged Attila's changes for interfaces, not tested yet

  Revision 1.17  2000/10/31 22:02:46  peter
    * symtable splitted, no real code changes

  Revision 1.16  2000/10/04 14:51:08  pierre
   * IsExe restored

  Revision 1.15  2000/09/27 21:20:56  peter
    * also set initlocalswitches in setcompilemode (merged)

  Revision 1.14  2000/09/26 10:50:41  jonas
    * initmodeswitches is changed is you change the compiler mode from the
      command line (the -S<x> switches didn't work anymore for changing the
      compiler mode) (merged from fixes branch)

  Revision 1.13  2000/09/24 21:33:46  peter
    * message updates merges

  Revision 1.12  2000/09/24 21:19:50  peter
    * delphi compile fixes

  Revision 1.11  2000/09/24 15:12:40  peter
    * fixed typo

  Revision 1.10  2000/09/24 15:06:16  peter
    * use defines.inc

  Revision 1.9  2000/09/24 10:33:07  peter
    * searching of exe in path also for OS/2
    * fixed searching of exe in path.

  Revision 1.8  2000/09/11 17:00:22  florian
    + first implementation of Netware Module support, thanks to
      Armin Diehl ([email protected]) for providing the patches

  Revision 1.7  2000/08/27 16:11:51  peter
    * moved some util functions from globals,cobjects to cutils
    * splitted files into finput,fmodule

  Revision 1.6  2000/08/12 19:14:58  peter
    * ELF writer works now also with -g
    * ELF writer is default again for linux

  Revision 1.5  2000/08/12 15:30:44  peter
    * IDE patch for stream reading (merged)

  Revision 1.4  2000/08/02 19:49:59  peter
    * first things for default parameters

  Revision 1.3  2000/07/13 12:08:25  michael
  + patched to 1.1.0 with former 1.09patch from peter

  Revision 1.2  2000/07/13 11:32:41  michael
  + removed logs

}