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https://gitlab.com/freepascal.org/fpc/source.git
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678 lines
22 KiB
ObjectPascal
678 lines
22 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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This unit does the parsing process
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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****************************************************************************
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}
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unit parser;
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{$i fpcdefs.inc}
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interface
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{$ifdef PREPROCWRITE}
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procedure preprocess(const filename:string);
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{$endif PREPROCWRITE}
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procedure compile(const filename:string);
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procedure initparser;
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procedure doneparser;
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implementation
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uses
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cutils,cclasses,
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globtype,version,tokens,systems,globals,verbose,
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symbase,symtable,symdef,symsym,
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fmodule,fppu,
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aasmbase,aasmtai,
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cgbase,
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script,gendef,
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{$ifdef BrowserLog}
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browlog,
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{$endif BrowserLog}
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{$ifdef UseExcept}
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tpexcept,
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{$endif UseExcept}
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{$ifdef GDB}
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gdb,
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{$endif GDB}
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comphook,
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scanner,scandir,
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pbase,ptype,psystem,pmodules,cresstr,cpuinfo;
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procedure initparser;
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begin
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{ ^M means a string or a char, because we don't parse a }
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{ type declaration }
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ignore_equal:=false;
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{ we didn't parse a object or class declaration }
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{ and no function header }
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testcurobject:=0;
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{ Symtable }
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aktprocsym:=nil;
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aktprocdef:=nil;
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objectlibrary:=nil;
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current_module:=nil;
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compiled_module:=nil;
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procinfo:=nil;
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loaded_units:=TLinkedList.Create;
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usedunits:=TLinkedList.Create;
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{ global switches }
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aktglobalswitches:=initglobalswitches;
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aktsourcecodepage:=initsourcecodepage;
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{ initialize scanner }
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InitScanner;
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InitScannerDirectives;
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{ scanner }
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c:=#0;
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pattern:='';
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orgpattern:='';
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current_scanner:=nil;
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{ register all nodes and tais }
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registernodes;
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registertais;
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{ memory sizes }
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if heapsize=0 then
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heapsize:=target_info.heapsize;
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if stacksize=0 then
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stacksize:=target_info.stacksize;
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{ open assembler response }
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GenerateAsmRes(outputexedir+'ppas');
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{ open deffile }
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DefFile:=TDefFile.Create(outputexedir+inputfile+target_info.defext);
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{ list of generated .o files, so the linker can remove them }
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SmartLinkOFiles:=TStringList.Create;
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end;
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procedure doneparser;
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begin
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{ unload units }
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loaded_units.free;
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usedunits.free;
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{ if there was an error in the scanner, the scanner is
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still assinged }
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if assigned(current_scanner) then
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begin
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current_scanner.free;
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current_scanner:=nil;
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end;
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{ close scanner }
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DoneScanner;
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{ close ppas,deffile }
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asmres.free;
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deffile.free;
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{ free list of .o files }
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SmartLinkOFiles.Free;
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end;
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procedure default_macros;
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var
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hp : tstringlistitem;
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begin
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{ commandline }
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hp:=tstringlistitem(initdefines.first);
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while assigned(hp) do
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begin
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current_scanner.def_macro(hp.str);
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hp:=tstringlistitem(hp.next);
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end;
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{ set macros for version checking }
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current_scanner.set_macro('FPC_VERSION',version_nr);
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current_scanner.set_macro('FPC_RELEASE',release_nr);
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current_scanner.set_macro('FPC_PATCH',patch_nr);
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end;
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{$ifdef PREPROCWRITE}
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procedure preprocess(const filename:string);
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var
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i : longint;
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begin
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new(preprocfile,init('pre'));
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{ default macros }
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current_scanner^.macros:=new(pdictionary,init);
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default_macros;
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{ initialize a module }
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current_module:=new(pmodule,init(filename,false));
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main_module:=current_module;
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{ startup scanner, and save in current_module }
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current_scanner:=new(pscannerfile,Init(filename));
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current_module.scanner:=current_scanner;
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{ loop until EOF is found }
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repeat
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current_scanner^.readtoken;
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preprocfile^.AddSpace;
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case token of
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_ID :
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begin
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preprocfile^.Add(orgpattern);
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end;
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_REALNUMBER,
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_INTCONST :
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preprocfile^.Add(pattern);
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_CSTRING :
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begin
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i:=0;
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while (i<length(pattern)) do
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begin
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inc(i);
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if pattern[i]='''' then
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begin
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insert('''',pattern,i);
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inc(i);
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end;
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end;
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preprocfile^.Add(''''+pattern+'''');
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end;
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_CCHAR :
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begin
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case pattern[1] of
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#39 :
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pattern:='''''''';
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#0..#31,
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#128..#255 :
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begin
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str(ord(pattern[1]),pattern);
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pattern:='#'+pattern;
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end;
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else
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pattern:=''''+pattern[1]+'''';
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end;
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preprocfile^.Add(pattern);
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end;
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_EOF :
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break;
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else
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preprocfile^.Add(tokeninfo^[token].str)
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end;
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until false;
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{ free scanner }
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dispose(current_scanner,done);
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current_scanner:=nil;
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{ close }
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dispose(preprocfile,done);
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end;
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{$endif PREPROCWRITE}
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procedure compile(const filename:string);
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var
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{ scanner }
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oldidtoken,
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oldtoken : ttoken;
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oldtokenpos : tfileposinfo;
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oldc : char;
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oldpattern,
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oldorgpattern : string;
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old_block_type : tblock_type;
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{ symtable }
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oldrefsymtable,
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olddefaultsymtablestack,
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oldsymtablestack : tsymtable;
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oldaktprocsym : tprocsym;
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oldaktprocdef : tprocdef;
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oldoverloaded_operators : toverloaded_operators;
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{ cg }
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oldparse_only : boolean;
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{ asmlists }
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oldimports,
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oldexports,
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oldresource,
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oldrttilist,
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oldresourcestringlist,
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oldbsssegment,
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olddatasegment,
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oldcodesegment,
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oldexprasmlist,
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olddebuglist,
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oldwithdebuglist,
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oldconsts : taasmoutput;
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oldobjectlibrary : tasmlibrarydata;
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{ resourcestrings }
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OldResourceStrings : tResourceStrings;
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{ akt.. things }
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oldaktlocalswitches : tlocalswitches;
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oldaktmoduleswitches : tmoduleswitches;
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oldaktfilepos : tfileposinfo;
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oldaktpackenum,oldaktmaxfpuregisters : longint;
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oldaktalignment : talignmentinfo;
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oldaktoutputformat : tasm;
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oldaktspecificoptprocessor,
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oldaktoptprocessor : tprocessors;
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oldaktasmmode : tasmmode;
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oldaktinterfacetype: tinterfacetypes;
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oldaktmodeswitches : tmodeswitches;
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old_compiled_module : tmodule;
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oldaktdefproccall : tproccalloption;
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oldsourcecodepage : tcodepagestring;
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{ will only be increased once we start parsing blocks in the }
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{ implementation, so doesn't need to be saved/restored (JM) }
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{ oldexceptblockcounter : integer; }
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oldstatement_level : integer;
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{$ifdef USEEXCEPT}
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{$ifndef Delphi}
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recoverpos : jmp_buf;
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oldrecoverpos : pjmp_buf;
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{$endif Delphi}
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{$endif useexcept}
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{$ifdef GDB}
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store_dbx : plongint;
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{$endif GDB}
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begin
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inc(compile_level);
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parser_current_file:=filename;
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old_compiled_module:=compiled_module;
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{ save symtable state }
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oldsymtablestack:=symtablestack;
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olddefaultsymtablestack:=defaultsymtablestack;
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oldrefsymtable:=refsymtable;
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oldaktprocsym:=aktprocsym;
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oldaktprocdef:=aktprocdef;
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oldaktdefproccall:=aktdefproccall;
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move(overloaded_operators,oldoverloaded_operators,sizeof(toverloaded_operators));
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{ save scanner state }
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oldc:=c;
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oldpattern:=pattern;
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oldorgpattern:=orgpattern;
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oldtoken:=token;
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oldidtoken:=idtoken;
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old_block_type:=block_type;
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oldtokenpos:=akttokenpos;
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oldsourcecodepage:=aktsourcecodepage;
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{ save cg }
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oldparse_only:=parse_only;
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{ save assembler lists }
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olddatasegment:=datasegment;
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oldbsssegment:=bsssegment;
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oldcodesegment:=codesegment;
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olddebuglist:=debuglist;
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oldwithdebuglist:=withdebuglist;
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oldconsts:=consts;
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oldrttilist:=rttilist;
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oldexprasmlist:=exprasmlist;
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oldimports:=importssection;
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oldexports:=exportssection;
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oldresource:=resourcesection;
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oldresourcestringlist:=resourcestringlist;
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oldobjectlibrary:=objectlibrary;
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OldResourceStrings:=ResourceStrings;
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{ save akt... state }
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{ handle the postponed case first }
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if localswitcheschanged then
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begin
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aktlocalswitches:=nextaktlocalswitches;
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localswitcheschanged:=false;
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end;
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oldaktlocalswitches:=aktlocalswitches;
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oldaktmoduleswitches:=aktmoduleswitches;
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oldaktalignment:=aktalignment;
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oldaktpackenum:=aktpackenum;
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oldaktmaxfpuregisters:=aktmaxfpuregisters;
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oldaktoutputformat:=aktoutputformat;
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oldaktoptprocessor:=aktoptprocessor;
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oldaktspecificoptprocessor:=aktspecificoptprocessor;
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oldaktasmmode:=aktasmmode;
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oldaktinterfacetype:=aktinterfacetype;
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oldaktfilepos:=aktfilepos;
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oldaktmodeswitches:=aktmodeswitches;
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oldstatement_level:=statement_level;
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{ oldexceptblockcounter:=exceptblockcounter; }
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{$ifdef GDB}
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store_dbx:=dbx_counter;
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dbx_counter:=nil;
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{$endif GDB}
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{ show info }
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Message1(parser_i_compiling,filename);
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{ reset symtable }
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symtablestack:=nil;
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defaultsymtablestack:=nil;
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systemunit:=nil;
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refsymtable:=nil;
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aktprocsym:=nil;
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aktdefproccall:=initdefproccall;
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registerdef:=true;
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statement_level:=0;
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aktexceptblock:=0;
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exceptblockcounter:=0;
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aktmaxfpuregisters:=-1;
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fillchar(overloaded_operators,sizeof(toverloaded_operators),0);
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{ reset the unit or create a new program }
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if assigned(current_module) then
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current_module.reset
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else
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begin
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current_module:=tppumodule.create(filename,'',false);
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main_module:=current_module;
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end;
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{ a unit compiled at command line must be inside the loaded_unit list }
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if (compile_level=1) then
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loaded_units.insert(current_module);
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{ Set the module to use for verbose }
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SetCompileModule(current_module);
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compiled_module:=current_module;
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current_module.in_compile:=true;
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{ Load current state from the init values }
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aktlocalswitches:=initlocalswitches;
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aktmoduleswitches:=initmoduleswitches;
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aktmodeswitches:=initmodeswitches;
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{$IFDEF Testvarsets}
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aktsetalloc:=initsetalloc;
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{$ENDIF}
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aktalignment:=initalignment;
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aktpackenum:=initpackenum;
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aktoutputformat:=initoutputformat;
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set_target_asm(aktoutputformat);
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aktoptprocessor:=initoptprocessor;
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aktspecificoptprocessor:=initspecificoptprocessor;
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aktasmmode:=initasmmode;
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aktinterfacetype:=initinterfacetype;
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{ startup scanner and load the first file }
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current_scanner:=tscannerfile.Create(filename);
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current_scanner.firstfile;
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current_module.scanner:=current_scanner;
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{ macros }
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default_macros;
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{ read the first token }
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current_scanner.readtoken;
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{ init code generator for a new module }
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codegen_newmodule;
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{ If the compile level > 1 we get a nice "unit expected" error
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message if we are trying to use a program as unit.}
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{$ifdef USEEXCEPT}
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if setjmp(recoverpos)=0 then
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begin
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oldrecoverpos:=recoverpospointer;
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recoverpospointer:=@recoverpos;
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{$endif USEEXCEPT}
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if (token=_UNIT) or (compile_level>1) then
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begin
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current_module.is_unit:=true;
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proc_unit;
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end
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else
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proc_program(token=_LIBRARY);
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{$ifdef USEEXCEPT}
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recoverpospointer:=oldrecoverpos;
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end
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else
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begin
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recoverpospointer:=oldrecoverpos;
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longjump_used:=true;
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end;
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{$endif USEEXCEPT}
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{ clear memory }
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{$ifdef Splitheap}
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if testsplit then
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begin
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{ temp heap should be empty after that !!!}
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codegen_donemodule;
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Releasetempheap;
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end;
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{$endif Splitheap}
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{ restore old state, close trees, > 0.99.5 has heapblocks, so
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it's the default to release the trees }
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codegen_donemodule;
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{ free ppu }
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if assigned(tppumodule(current_module).ppufile) then
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begin
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tppumodule(current_module).ppufile.free;
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tppumodule(current_module).ppufile:=nil;
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end;
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{ free scanner }
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if assigned(current_module.scanner) then
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begin
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if current_scanner=tscannerfile(current_module.scanner) then
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current_scanner:=nil;
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tscannerfile(current_module.scanner).free;
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current_module.scanner:=nil;
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end;
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if (compile_level>1) then
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begin
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{$ifdef GDB}
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dbx_counter:=store_dbx;
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{$endif GDB}
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{ restore scanner }
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c:=oldc;
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pattern:=oldpattern;
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orgpattern:=oldorgpattern;
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token:=oldtoken;
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idtoken:=oldidtoken;
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akttokenpos:=oldtokenpos;
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block_type:=old_block_type;
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{ restore cg }
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parse_only:=oldparse_only;
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{ restore asmlists }
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exprasmlist:=oldexprasmlist;
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datasegment:=olddatasegment;
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bsssegment:=oldbsssegment;
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codesegment:=oldcodesegment;
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consts:=oldconsts;
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debuglist:=olddebuglist;
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withdebuglist:=oldwithdebuglist;
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importssection:=oldimports;
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exportssection:=oldexports;
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resourcesection:=oldresource;
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rttilist:=oldrttilist;
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resourcestringlist:=oldresourcestringlist;
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{ object data }
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ResourceStrings:=OldResourceStrings;
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objectlibrary:=oldobjectlibrary;
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{ restore previous scanner }
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current_scanner:=tscannerfile(old_compiled_module.scanner);
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if assigned(current_scanner) then
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parser_current_file:=current_scanner.inputfile.name^;
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{ restore symtable state }
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refsymtable:=oldrefsymtable;
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symtablestack:=oldsymtablestack;
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defaultsymtablestack:=olddefaultsymtablestack;
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aktdefproccall:=oldaktdefproccall;
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aktprocsym:=oldaktprocsym;
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aktprocdef:=oldaktprocdef;
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move(oldoverloaded_operators,overloaded_operators,sizeof(toverloaded_operators));
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aktsourcecodepage:=oldsourcecodepage;
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aktlocalswitches:=oldaktlocalswitches;
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aktmoduleswitches:=oldaktmoduleswitches;
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aktalignment:=oldaktalignment;
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aktpackenum:=oldaktpackenum;
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aktmaxfpuregisters:=oldaktmaxfpuregisters;
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aktoutputformat:=oldaktoutputformat;
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set_target_asm(aktoutputformat);
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aktoptprocessor:=oldaktoptprocessor;
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aktspecificoptprocessor:=oldaktspecificoptprocessor;
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aktasmmode:=oldaktasmmode;
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aktinterfacetype:=oldaktinterfacetype;
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aktfilepos:=oldaktfilepos;
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aktmodeswitches:=oldaktmodeswitches;
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statement_level:=oldstatement_level;
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aktexceptblock:=0;
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exceptblockcounter:=0;
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end
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else
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begin
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parser_current_file:='';
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end;
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{ Shut down things when the last file is compiled }
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if (compile_level=1) then
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begin
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{ Close script }
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if (not AsmRes.Empty) then
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begin
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Message1(exec_i_closing_script,AsmRes.Fn);
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AsmRes.WriteToDisk;
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end;
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{$ifdef USEEXCEPT}
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|
if not longjump_used then
|
|
{$endif USEEXCEPT}
|
|
{ do not create browsers on errors !! }
|
|
if status.errorcount=0 then
|
|
begin
|
|
{$ifdef BrowserLog}
|
|
{ Write Browser Log }
|
|
if (cs_browser_log in aktglobalswitches) and
|
|
(cs_browser in aktmoduleswitches) then
|
|
begin
|
|
if browserlog.elements_to_list.empty then
|
|
begin
|
|
Message1(parser_i_writing_browser_log,browserlog.Fname);
|
|
WriteBrowserLog;
|
|
end
|
|
else
|
|
browserlog.list_elements;
|
|
end;
|
|
{$endif BrowserLog}
|
|
|
|
{ Write Browser Collections }
|
|
do_extractsymbolinfo{$ifdef FPC}(){$endif};
|
|
end;
|
|
|
|
if current_module.in_second_compile then
|
|
begin
|
|
current_module.in_second_compile:=false;
|
|
current_module.in_compile:=true;
|
|
end
|
|
else
|
|
current_module.in_compile:=false;
|
|
|
|
end;
|
|
|
|
dec(compile_level);
|
|
compiled_module:=old_compiled_module;
|
|
{$ifdef USEEXCEPT}
|
|
if longjump_used then
|
|
longjmp(recoverpospointer^,1);
|
|
{$endif USEEXCEPT}
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.43 2002-08-18 19:58:28 peter
|
|
* more current_scanner fixes
|
|
|
|
Revision 1.42 2002/08/16 15:31:08 peter
|
|
* fixed possible crashes with current_scanner
|
|
|
|
Revision 1.41 2002/08/15 19:10:35 peter
|
|
* first things tai,tnode storing in ppu
|
|
|
|
Revision 1.40 2002/08/12 16:46:04 peter
|
|
* tscannerfile is now destroyed in tmodule.reset and current_scanner
|
|
is updated accordingly. This removes all the loading and saving of
|
|
the old scanner and the invalid flag marking
|
|
|
|
Revision 1.39 2002/08/12 15:08:40 carl
|
|
+ stab register indexes for powerpc (moved from gdb to cpubase)
|
|
+ tprocessor enumeration moved to cpuinfo
|
|
+ linker in target_info is now a class
|
|
* many many updates for m68k (will soon start to compile)
|
|
- removed some ifdef or correct them for correct cpu
|
|
|
|
Revision 1.38 2002/08/11 14:28:19 peter
|
|
* TScannerFile.SetInvalid added that will also reset inputfile
|
|
|
|
Revision 1.37 2002/08/11 13:24:12 peter
|
|
* saving of asmsymbols in ppu supported
|
|
* asmsymbollist global is removed and moved into a new class
|
|
tasmlibrarydata that will hold the info of a .a file which
|
|
corresponds with a single module. Added librarydata to tmodule
|
|
to keep the library info stored for the module. In the future the
|
|
objectfiles will also be stored to the tasmlibrarydata class
|
|
* all getlabel/newasmsymbol and friends are moved to the new class
|
|
|
|
Revision 1.36 2002/08/09 19:15:41 carl
|
|
- removed newcg define
|
|
|
|
Revision 1.35 2002/07/20 17:16:03 florian
|
|
+ source code page support
|
|
|
|
Revision 1.34 2002/07/01 18:46:24 peter
|
|
* internal linker
|
|
* reorganized aasm layer
|
|
|
|
Revision 1.33 2002/05/18 13:34:11 peter
|
|
* readded missing revisions
|
|
|
|
Revision 1.32 2002/05/16 19:46:42 carl
|
|
+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
|
|
+ try to fix temp allocation (still in ifdef)
|
|
+ generic constructor calls
|
|
+ start of tassembler / tmodulebase class cleanup
|
|
|
|
Revision 1.30 2002/04/21 18:57:23 peter
|
|
* fixed memleaks when file can't be opened
|
|
|
|
Revision 1.29 2002/04/20 21:32:24 carl
|
|
+ generic FPC_CHECKPOINTER
|
|
+ first parameter offset in stack now portable
|
|
* rename some constants
|
|
+ move some cpu stuff to other units
|
|
- remove unused constents
|
|
* fix stacksize for some targets
|
|
* fix generic size problems which depend now on EXTEND_SIZE constant
|
|
|
|
Revision 1.28 2002/04/19 15:46:02 peter
|
|
* mangledname rewrite, tprocdef.mangledname is now created dynamicly
|
|
in most cases and not written to the ppu
|
|
* add mangeledname_prefix() routine to generate the prefix of
|
|
manglednames depending on the current procedure, object and module
|
|
* removed static procprefix since the mangledname is now build only
|
|
on demand from tprocdef.mangledname
|
|
|
|
Revision 1.27 2002/01/29 19:43:11 peter
|
|
* update target_asm according to outputformat
|
|
|
|
}
|