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{
Copyright (c) 1998-2003 by Peter Vreman, Florian Klaempfl and Carl Eric Codere
Basic stuff for assembler readers
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit rasm;
{$i fpcdefs.inc}
interface
uses
cclasses,
rabase,
aasmbase,
aasmtai,aasmdata,
systems,
cpubase,
cgbase;
type
tasmreader = class(tbaseasmreader)
firsttoken : boolean;
_asmsorted : boolean;
curlist : TAsmList;
c : char;
actasmpattern : string;
actopcode : tasmop;
actasmregister : tregister;
actcondition : tasmcond;
iasmops : TFPHashList;
locallabels : TFPHashObjectList;
constructor create;override;
destructor destroy;override;
function createlocallabel(const s: string; var hl: tasmlabel; emit: boolean): boolean;
procedure checklocallabels;
end;
implementation
uses
verbose;
type
TLocalLabel = class(TFPHashObject)
emitted: boolean;
lab: tasmlabel;
function Gettasmlabel: tasmlabel;
end;
function TLocalLabel.Gettasmlabel:tasmlabel;
begin
if not assigned(lab) then
begin
current_asmdata.getjumplabel(lab);
{ this label is forced to be used so it's always written }
lab.increfs;
end;
result:=lab;
end;
constructor tasmreader.create;
begin
inherited create;
firsttoken:=true;
locallabels:=TFPHashObjectList.create;
end;
destructor tasmreader.destroy;
begin
locallabels.Free;
iasmops.Free;
inherited destroy;
end;
function tasmreader.createlocallabel(const s: string; var hl: tasmlabel; emit:boolean):boolean;
var
lab: TLocalLabel;
begin
result:=true;
{ Check if it already is defined }
lab:=TLocalLabel(locallabels.Find(s));
if not assigned(lab) then
lab:=TLocalLabel.Create(locallabels,s);
{ set emitted flag and check for dup syms }
if emit then
begin
if lab.Emitted then
begin
Message1(asmr_e_dup_local_sym,lab.Name);
result:=false;
end;
lab.Emitted:=true;
end;
hl:=lab.Gettasmlabel;
end;
procedure tasmreader.checklocallabels;
var
i: longint;
lab: TLocalLabel;
begin
for i:=0 to locallabels.Count-1 do
begin
lab:=TLocalLabel(locallabels[i]);
if not lab.emitted then
Message1(asmr_e_unknown_label_identifier,lab.name);
end;
locallabels.Clear;
end;
end.
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