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https://gitlab.com/freepascal.org/fpc/source.git
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745 lines
23 KiB
ObjectPascal
745 lines
23 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 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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{$i defines.inc}
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interface
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{$ifdef PREPROCWRITE}
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procedure preprocess(const filename:string);
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{$endif PREPROCWRITE}
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procedure compile(const filename:string);
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procedure initparser;
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procedure doneparser;
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implementation
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uses
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cutils,cclasses,
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globtype,version,tokens,systems,globals,verbose,
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symbase,symtable,symdef,symsym,fmodule,fppu,aasm,
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cgbase,
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script,gendef,
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{$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,pmodules,cresstr;
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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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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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{ 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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{ 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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oldcurrent_scanner,prev_scanner,
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scanner : tscannerfile;
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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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oldnextlabelnr : longint;
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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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oldasmsymbollist : tdictionary;
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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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{ 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 newcg}
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oldcg : pcg;
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{$endif newcg}
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{$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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oldcurrent_scanner:=current_scanner;
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{ save cg }
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oldnextlabelnr:=nextlabelnr;
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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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oldasmsymbollist:=asmsymbollist;
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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 newcg}
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oldcg:=cg;
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{$endif newcg}
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{$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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begin
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{current_module.reset this is wrong !! }
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scanner:=tscannerfile(current_module.scanner);
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current_module.reset;
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tscannerfile(current_module.scanner):=scanner;
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end
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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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{$ENDIF}
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aktalignment:=initalignment;
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aktpackenum:=initpackenum;
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aktoutputformat:=initoutputformat;
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set_target_asm(aktoutputformat);
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aktoptprocessor:=initoptprocessor;
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aktspecificoptprocessor:=initspecificoptprocessor;
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aktasmmode:=initasmmode;
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aktinterfacetype:=initinterfacetype;
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{ startup scanner and load the first file }
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current_scanner:=tscannerfile.Create(filename);
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current_scanner.firstfile;
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{ macros }
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default_macros;
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{ read the first token }
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current_scanner.readtoken;
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prev_scanner:=tscannerfile(current_module.scanner);
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current_module.scanner:=current_scanner;
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{ init code generator for a new module }
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codegen_newmodule;
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{$ifdef newcg}
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{$ifdef i386}
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cg:=new(pcg386,init);
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{$endif i386}
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{$ifdef alpha}
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cg:=new(pcgalpha,init);
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{$endif alpha}
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{$ifdef powerpc}
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cg:=new(pcgppc,init);
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{$endif powerpc}
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{$endif newcg}
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{ If the compile level > 1 we get a nice "unit expected" error
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message if we are trying to use a program as unit.}
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{$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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{$endif Splitheap}
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{ restore old state, close trees, > 0.99.5 has heapblocks, so
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it's the default to release the trees }
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codegen_donemodule;
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{$ifdef newcg}
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dispose(cg,done);
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{$endif newcg}
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{ free ppu }
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if assigned(tppumodule(current_module).ppufile) then
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begin
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tppumodule(current_module).ppufile.free;
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tppumodule(current_module).ppufile:=nil;
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end;
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{ free scanner }
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current_scanner.free;
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current_scanner:=nil;
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{ restore previous scanner !! }
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current_module.scanner:=prev_scanner;
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if assigned(prev_scanner) then
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prev_scanner.invalid:=true;
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if (compile_level>1) then
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begin
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{$ifdef newcg}
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cg:=oldcg;
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{$endif newcg}
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{$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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current_scanner:=oldcurrent_scanner;
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parser_current_file:=current_scanner.inputfile.name^;
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{ restore cg }
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nextlabelnr:=oldnextlabelnr;
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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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asmsymbollist:=oldasmsymbollist;
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ResourceStrings:=OldResourceStrings;
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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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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;
|
|
aktmodeswitches:=oldaktmodeswitches;
|
|
statement_level:=oldstatement_level;
|
|
aktexceptblock:=0;
|
|
exceptblockcounter:=0;
|
|
end
|
|
else
|
|
begin
|
|
parser_current_file:='';
|
|
end;
|
|
|
|
{ Shut down things when the last file is compiled }
|
|
if (compile_level=1) then
|
|
begin
|
|
{ Close script }
|
|
if (not AsmRes.Empty) then
|
|
begin
|
|
Message1(exec_i_closing_script,AsmRes.Fn);
|
|
AsmRes.WriteToDisk;
|
|
end;
|
|
|
|
{$ifdef USEEXCEPT}
|
|
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}(){$endif};
|
|
end;
|
|
|
|
if current_module.in_second_compile then
|
|
begin
|
|
current_module.in_second_compile:=false;
|
|
current_module.in_compile:=true;
|
|
end
|
|
else
|
|
current_module.in_compile:=false;
|
|
|
|
(* Obsolete code aktprocsym
|
|
is disposed by the localsymtable disposal (PM)
|
|
{ Free last aktprocsym }
|
|
if assigned(aktprocsym) and (aktprocsym.owner=nil) then
|
|
begin
|
|
{ init parts are not needed in units !! }
|
|
if current_module.is_unit then
|
|
aktprocdef.forwarddef:=false;
|
|
dispose(aktprocsym,done);
|
|
end; *)
|
|
end;
|
|
|
|
dec(compile_level);
|
|
compiled_module:=old_compiled_module;
|
|
{$ifdef USEEXCEPT}
|
|
if longjump_used then
|
|
longjmp(recoverpospointer^,1);
|
|
{$endif USEEXCEPT}
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.30 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
|
|
|
|
Revision 1.26 2001/11/02 22:58:02 peter
|
|
* procsym definition rewrite
|
|
|
|
Revision 1.25 2001/10/25 21:22:35 peter
|
|
* calling convention rewrite
|
|
|
|
Revision 1.24 2001/10/23 21:49:42 peter
|
|
* $calling directive and -Cc commandline patch added
|
|
from Pavel Ozerski
|
|
|
|
Revision 1.23 2001/10/16 15:10:35 jonas
|
|
* fixed goto/label/try bugs
|
|
|
|
Revision 1.22 2001/08/26 13:36:43 florian
|
|
* some cg reorganisation
|
|
* some PPC updates
|
|
|
|
Revision 1.21 2001/07/30 20:59:27 peter
|
|
* m68k updates from v10 merged
|
|
|
|
Revision 1.20 2001/07/01 20:16:16 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 1.19 2001/05/19 23:05:19 peter
|
|
* support uses <unit> in <file> construction
|
|
|
|
Revision 1.18 2001/05/06 14:49:17 peter
|
|
* ppu object to class rewrite
|
|
* move ppu read and write stuff to fppu
|
|
|
|
Revision 1.17 2001/04/18 22:01:54 peter
|
|
* registration of targets and assemblers
|
|
|
|
Revision 1.16 2001/04/15 09:48:30 peter
|
|
* fixed crash in labelnode
|
|
* easier detection of goto and label in try blocks
|
|
|
|
Revision 1.15 2001/04/13 18:08:37 peter
|
|
* scanner object to class
|
|
|
|
Revision 1.14 2001/04/13 01:22:10 peter
|
|
* symtable change to classes
|
|
* range check generation and errors fixed, make cycle DEBUG=1 works
|
|
* memory leaks fixed
|
|
|
|
Revision 1.13 2000/12/25 00:07:27 peter
|
|
+ new tlinkedlist class (merge of old tstringqueue,tcontainer and
|
|
tlinkedlist objects)
|
|
|
|
Revision 1.12 2000/12/24 12:24:38 peter
|
|
* moved preprocessfile into a conditional
|
|
|
|
Revision 1.11 2000/11/29 00:30:34 florian
|
|
* unused units removed from uses clause
|
|
* some changes for widestrings
|
|
|
|
Revision 1.10 2000/11/12 22:17:46 peter
|
|
* some realname updates for messages
|
|
|
|
Revision 1.9 2000/11/04 14:25:20 florian
|
|
+ merged Attila's changes for interfaces, not tested yet
|
|
|
|
Revision 1.8 2000/10/31 22:02:49 peter
|
|
* symtable splitted, no real code changes
|
|
|
|
Revision 1.7 2000/10/14 10:14:51 peter
|
|
* moehrendorf oct 2000 rewrite
|
|
|
|
Revision 1.6 2000/10/01 19:48:25 peter
|
|
* lot of compile updates for cg11
|
|
|
|
Revision 1.5 2000/09/24 15:06:20 peter
|
|
* use defines.inc
|
|
|
|
Revision 1.4 2000/08/27 16:11:51 peter
|
|
* moved some util functions from globals,cobjects to cutils
|
|
* splitted files into finput,fmodule
|
|
|
|
Revision 1.3 2000/08/12 15:34:22 peter
|
|
+ usedasmsymbollist to check and reset only the used symbols (merged)
|
|
|
|
Revision 1.2 2000/07/13 11:32:44 michael
|
|
+ removed logs
|
|
|
|
}
|