mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-05-01 13:33:49 +02:00
711 lines
23 KiB
ObjectPascal
711 lines
23 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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{$endif PREPROCWRITE}
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procedure compile(const filename:string);
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procedure initparser;
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procedure doneparser;
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implementation
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uses
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cutils,cclasses,
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globtype,version,tokens,systems,globals,verbose,
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symbase,symtable,symsym,
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finput,fmodule,fppu,
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aasmbase,aasmtai,
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cgbase,
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script,gendef,
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{$ifdef BrowserLog}
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browlog,
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{$endif BrowserLog}
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{$ifdef 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,psub,
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cresstr,cpuinfo,procinfo;
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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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{ Current compiled module/proc }
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objectlibrary:=nil;
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current_module:=nil;
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compiled_module:=nil;
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current_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 stacksize=0 then
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stacksize:=target_info.stacksize;
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{ open assembler response }
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if cs_link_on_target in aktglobalswitches then
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GenerateAsmRes(outputexedir+inputfile+'_ppas')
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else
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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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{ codegen }
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if paraprintnodetree<>0 then
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printnode_reset;
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{ target specific stuff }
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case target_info.system of
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system_powerpc_morphos:
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include(supported_calling_conventions,pocall_syscall);
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system_m68k_amiga:
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include(supported_calling_conventions,pocall_syscall);
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end;
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end;
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procedure doneparser;
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begin
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{ Reset current compiling info, so destroy routines can't
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reference the data that might already be destroyed }
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objectlibrary:=nil;
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current_module:=nil;
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compiled_module:=nil;
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current_procinfo:=nil;
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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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{$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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{ initialize a module }
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current_module:=new(pmodule,init(filename,false));
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macrosymtablestack:= initialmacrosymtable;
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current_module.localmacrosymtable:= tmacrosymtable.create(false);
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current_module.localmacrosymtable.next:= initialmacrosymtable;
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macrosymtablestack:= current_module.localmacrosymtable;
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ConsolidateMode;
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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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{*****************************************************************************
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Create information for a new module
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*****************************************************************************}
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procedure init_module;
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begin
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{ Create assembler output lists for CG }
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exprasmlist:=taasmoutput.create;
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datasegment:=taasmoutput.create;
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codesegment:=taasmoutput.create;
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bsssegment:=taasmoutput.create;
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debuglist:=taasmoutput.create;
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withdebuglist:=taasmoutput.create;
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consts:=taasmoutput.create;
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rttilist:=taasmoutput.create;
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picdata:=taasmoutput.create;
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if target_info.system=system_powerpc_darwin then
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picdata.concat(tai_simple.create(ait_non_lazy_symbol_pointer));
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ResourceStringList:=Nil;
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importssection:=nil;
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exportssection:=nil;
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resourcesection:=nil;
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{ Resource strings }
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ResourceStrings:=TResourceStrings.Create;
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{ use the librarydata from current_module }
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objectlibrary:=current_module.librarydata;
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end;
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procedure done_module;
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{$ifdef MEMDEBUG}
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var
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d : tmemdebug;
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{$endif}
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begin
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{$ifdef MEMDEBUG}
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d:=tmemdebug.create(current_module.modulename^+' - asmlists');
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{$endif}
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exprasmlist.free;
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codesegment.free;
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bsssegment.free;
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datasegment.free;
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debuglist.free;
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withdebuglist.free;
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consts.free;
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rttilist.free;
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picdata.free;
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if assigned(ResourceStringList) then
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ResourceStringList.free;
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if assigned(importssection) then
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importssection.free;
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if assigned(exportssection) then
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exportssection.free;
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if assigned(resourcesection) then
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resourcesection.free;
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{$ifdef MEMDEBUG}
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d.free;
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{$endif}
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{ resource strings }
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ResourceStrings.free;
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objectlibrary:=nil;
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end;
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{*****************************************************************************
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Compile a source file
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*****************************************************************************}
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procedure compile(const filename:string);
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type
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polddata=^tolddata;
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tolddata=record
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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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olddefaultmacrosymtablestack,
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oldmacrosymtablestack : tsymtable;
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oldaktprocsym : tprocsym;
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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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oldpicdata,
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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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oldaktpackrecords,
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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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oldaktfputype : tfputype;
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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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oldcurrent_procinfo : tprocinfo;
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oldaktdefproccall : tproccalloption;
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oldsourcecodepage : tcodepagestring;
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{$ifdef GDB}
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store_dbx : plongint;
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{$endif GDB}
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end;
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var
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olddata : polddata;
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begin
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inc(compile_level);
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parser_current_file:=filename;
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{ Uses heap memory instead of placing everything on the
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stack. This is needed because compile() can be called
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recursively }
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new(olddata);
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with olddata^ do
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begin
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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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oldmacrosymtablestack:=macrosymtablestack;
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olddefaultsymtablestack:=defaultsymtablestack;
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olddefaultmacrosymtablestack:=defaultmacrosymtablestack;
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oldrefsymtable:=refsymtable;
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oldcurrent_procinfo:=current_procinfo;
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oldaktdefproccall:=aktdefproccall;
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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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oldpicdata:=picdata;
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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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oldaktpackrecords:=aktpackrecords;
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oldaktfputype:=aktfputype;
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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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{$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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end;
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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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macrosymtablestack:=nil;
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defaultsymtablestack:=nil;
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defaultmacrosymtablestack:=nil;
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systemunit:=nil;
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refsymtable:=nil;
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aktdefproccall:=initdefproccall;
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registerdef:=true;
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aktexceptblock:=0;
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exceptblockcounter:=0;
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aktmaxfpuregisters:=-1;
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{ reset the unit or create a new program }
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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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begin
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if assigned(current_module) then
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internalerror(200501158);
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current_module:=tppumodule.create(nil,filename,'',false);
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addloadedunit(current_module);
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main_module:=current_module;
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current_module.state:=ms_compile;
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end;
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if not(assigned(current_module) and
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(current_module.state in [ms_compile,ms_second_compile])) then
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internalerror(200212281);
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{ Set the module to use for verbose }
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compiled_module:=current_module;
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SetCompileModule(current_module);
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Fillchar(aktfilepos,0,sizeof(aktfilepos));
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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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aktfputype:=initfputype;
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aktpackenum:=initpackenum;
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aktpackrecords:=0;
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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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{ init macros before anything in the file is parsed.}
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macrosymtablestack:= initialmacrosymtable;
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current_module.localmacrosymtable:= tmacrosymtable.create(false);
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current_module.localmacrosymtable.next:= initialmacrosymtable;
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macrosymtablestack:= current_module.localmacrosymtable;
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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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init_module;
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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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try
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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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finally
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{ restore old state }
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done_module;
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if assigned(current_module) then
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begin
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{ module is now compiled }
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tppumodule(current_module).state:=ms_compiled;
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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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end;
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if (compile_level>1) then
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begin
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with olddata^ do
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begin
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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;
|
|
consts:=oldconsts;
|
|
debuglist:=olddebuglist;
|
|
withdebuglist:=oldwithdebuglist;
|
|
importssection:=oldimports;
|
|
exportssection:=oldexports;
|
|
resourcesection:=oldresource;
|
|
rttilist:=oldrttilist;
|
|
picdata:=oldpicdata;
|
|
resourcestringlist:=oldresourcestringlist;
|
|
{ object data }
|
|
ResourceStrings:=OldResourceStrings;
|
|
objectlibrary:=oldobjectlibrary;
|
|
{ restore previous scanner }
|
|
if assigned(old_compiled_module) then
|
|
current_scanner:=tscannerfile(old_compiled_module.scanner)
|
|
else
|
|
current_scanner:=nil;
|
|
if assigned(current_scanner) then
|
|
parser_current_file:=current_scanner.inputfile.name^;
|
|
{ restore symtable state }
|
|
refsymtable:=oldrefsymtable;
|
|
symtablestack:=oldsymtablestack;
|
|
macrosymtablestack:=oldmacrosymtablestack;
|
|
defaultsymtablestack:=olddefaultsymtablestack;
|
|
defaultmacrosymtablestack:=olddefaultmacrosymtablestack;
|
|
aktdefproccall:=oldaktdefproccall;
|
|
current_procinfo:=oldcurrent_procinfo;
|
|
aktsourcecodepage:=oldsourcecodepage;
|
|
aktlocalswitches:=oldaktlocalswitches;
|
|
aktmoduleswitches:=oldaktmoduleswitches;
|
|
aktalignment:=oldaktalignment;
|
|
aktpackenum:=oldaktpackenum;
|
|
aktpackrecords:=oldaktpackrecords;
|
|
aktmaxfpuregisters:=oldaktmaxfpuregisters;
|
|
aktoutputformat:=oldaktoutputformat;
|
|
set_target_asm(aktoutputformat);
|
|
aktoptprocessor:=oldaktoptprocessor;
|
|
aktspecificoptprocessor:=oldaktspecificoptprocessor;
|
|
aktfputype:=oldaktfputype;
|
|
aktasmmode:=oldaktasmmode;
|
|
aktinterfacetype:=oldaktinterfacetype;
|
|
aktfilepos:=oldaktfilepos;
|
|
aktmodeswitches:=oldaktmodeswitches;
|
|
aktexceptblock:=0;
|
|
exceptblockcounter:=0;
|
|
{$ifdef GDB}
|
|
dbx_counter:=store_dbx;
|
|
{$endif GDB}
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
{ Shut down things when the last file is compiled succesfull }
|
|
if (compile_level=1) and
|
|
(status.errorcount=0) then
|
|
begin
|
|
parser_current_file:='';
|
|
{ Close script }
|
|
if (not AsmRes.Empty) then
|
|
begin
|
|
Message1(exec_i_closing_script,AsmRes.Fn);
|
|
AsmRes.WriteToDisk;
|
|
end;
|
|
|
|
{ do not create browsers on errors !! }
|
|
if status.errorcount=0 then
|
|
begin
|
|
{$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;
|
|
{ Write Browser Collections }
|
|
do_extractsymbolinfo{$ifdef FPC}(){$endif};
|
|
{$endif BrowserLog}
|
|
end;
|
|
end;
|
|
end;
|
|
|
|
dec(compile_level);
|
|
compiled_module:=olddata^.old_compiled_module;
|
|
SetCompileModule(compiled_module);
|
|
|
|
dispose(olddata);
|
|
end;
|
|
end;
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.72 2005-01-29 11:36:52 peter
|
|
* update x86_64 with new cpupara
|
|
|
|
Revision 1.71 2005/01/26 16:23:28 peter
|
|
* detect arithmetic overflows for constants at compile time
|
|
* use try..except instead of setjmp
|
|
|
|
Revision 1.70 2005/01/19 22:19:41 peter
|
|
* unit mapping rewrite
|
|
* new derefmap added
|
|
|
|
Revision 1.69 2005/01/09 20:24:43 olle
|
|
* rework of macro subsystem
|
|
+ exportable macros for mode macpas
|
|
|
|
Revision 1.68 2004/10/25 15:38:41 peter
|
|
* heap and heapsize removed
|
|
* checkpointer fixes
|
|
|
|
Revision 1.67 2004/10/15 09:14:17 mazen
|
|
- remove $IFDEF DELPHI and related code
|
|
- remove $IFDEF FPCPROCVAR and related code
|
|
|
|
Revision 1.66 2004/06/20 08:55:30 florian
|
|
* logs truncated
|
|
|
|
Revision 1.65 2004/05/12 13:21:09 karoly
|
|
* few small changes to add syscall support to M68k/Amiga target
|
|
|
|
Revision 1.64 2004/04/28 15:19:03 florian
|
|
+ syscall directive support for MorphOS added
|
|
|
|
Revision 1.63 2004/03/16 16:20:49 peter
|
|
* reset current_module,current_procinfo so the destroy routines
|
|
can't access their info anymore, because that can be already
|
|
destroyed
|
|
|
|
Revision 1.62 2004/03/14 20:08:37 peter
|
|
* packrecords fixed for settings from $PACKRECORDS
|
|
* default packrecords now uses value 0 and uses info from aligment
|
|
structure only, initpackrecords removed
|
|
|
|
Revision 1.61 2004/03/02 17:32:12 florian
|
|
* make cycle fixed
|
|
+ pic support for darwin
|
|
+ support of importing vars from shared libs on darwin implemented
|
|
|
|
}
|