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569 lines
14 KiB
ObjectPascal
569 lines
14 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2000 by Florian Klaempfl, Pierre Muller
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This unit handles the symbol tables
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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 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 symtype;
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{$i defines.inc}
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interface
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uses
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{ common }
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cutils,
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{ global }
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globtype,globals,
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{ symtable }
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symconst,symbase,
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{ aasm }
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aasm
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;
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type
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{************************************************
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Required Forwards
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************************************************}
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tsym = class;
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{************************************************
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TRef
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************************************************}
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tref = class
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nextref : tref;
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posinfo : tfileposinfo;
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moduleindex : longint;
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is_written : boolean;
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constructor create(ref:tref;pos:pfileposinfo);
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procedure freechain;
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destructor destroy;override;
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end;
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{************************************************
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TDef
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************************************************}
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tgetsymtable = (gs_none,gs_record,gs_local,gs_para);
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tdef = class(tdefentry)
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typesym : tsym; { which type the definition was generated this def }
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defoptions : tdefoptions;
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constructor create;
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procedure deref;virtual;abstract;
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procedure derefimpl;virtual;abstract;
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function typename:string;
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function gettypename:string;virtual;
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function size:longint;virtual;abstract;
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function alignment:longint;virtual;abstract;
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function getsymtable(t:tgetsymtable):tsymtable;virtual;
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function is_publishable:boolean;virtual;abstract;
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function needs_inittable:boolean;virtual;abstract;
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end;
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{************************************************
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TSym
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************************************************}
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{ this object is the base for all symbol objects }
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tsym = class(tsymentry)
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_realname : pstring;
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fileinfo : tfileposinfo;
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symoptions : tsymoptions;
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constructor create(const n : string);
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destructor destroy;override;
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function realname:string;
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procedure deref;virtual;abstract;
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function gettypedef:tdef;virtual;
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end;
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{************************************************
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TType
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************************************************}
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ttype = object
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def : tdef;
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sym : tsym;
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procedure reset;
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procedure setdef(p:tdef);
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procedure setsym(p:tsym);
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procedure resolve;
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end;
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{************************************************
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TSymList
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************************************************}
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psymlistitem = ^tsymlistitem;
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tsymlistitem = record
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sltype : tsltype;
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sym : tsym;
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value : longint;
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next : psymlistitem;
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end;
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tsymlist = class
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def : tdef;
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firstsym,
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lastsym : psymlistitem;
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constructor create;
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destructor destroy;override;
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function empty:boolean;
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procedure setdef(p:tdef);
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procedure addsym(slt:tsltype;p:tsym);
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procedure addconst(slt:tsltype;v:longint);
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procedure clear;
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function getcopy:tsymlist;
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procedure resolve;
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end;
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{ resolving }
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procedure resolvesym(var sym:tsym);
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procedure resolvedef(var def:tdef);
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implementation
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uses
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verbose,
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fmodule;
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{****************************************************************************
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Tdef
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****************************************************************************}
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constructor tdef.create;
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begin
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inherited create;
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deftype:=abstractdef;
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owner := nil;
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typesym := nil;
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defoptions:=[];
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end;
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function tdef.typename:string;
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begin
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if assigned(typesym) and
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not(deftype=procvardef) and
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assigned(typesym._realname) and
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(typesym._realname^[1]<>'$') then
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typename:=typesym._realname^
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else
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typename:=gettypename;
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end;
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function tdef.gettypename : string;
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begin
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gettypename:='<unknown type>'
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end;
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function tdef.getsymtable(t:tgetsymtable):tsymtable;
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begin
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getsymtable:=nil;
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end;
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{****************************************************************************
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TSYM (base for all symtypes)
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****************************************************************************}
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constructor tsym.create(const n : string);
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begin
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if n[1]='$' then
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inherited createname(copy(n,2,255))
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else
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inherited createname(upper(n));
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_realname:=stringdup(n);
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typ:=abstractsym;
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symoptions:=[];
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end;
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destructor tsym.destroy;
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begin
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stringdispose(_realname);
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inherited destroy;
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end;
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function tsym.realname : string;
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begin
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if assigned(_realname) then
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realname:=_realname^
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else
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realname:=name;
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end;
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function tsym.gettypedef:tdef;
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begin
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gettypedef:=nil;
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end;
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{****************************************************************************
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TRef
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****************************************************************************}
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constructor tref.create(ref :tref;pos : pfileposinfo);
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begin
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nextref:=nil;
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if pos<>nil then
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posinfo:=pos^;
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if assigned(current_module) then
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moduleindex:=current_module.unit_index;
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if assigned(ref) then
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ref.nextref:=self;
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is_written:=false;
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end;
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procedure tref.freechain;
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var
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p,q : tref;
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begin
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p:=nextref;
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nextref:=nil;
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while assigned(p) do
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begin
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q:=p.nextref;
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p.free;
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p:=q;
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end;
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end;
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destructor tref.destroy;
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begin
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nextref:=nil;
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end;
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{****************************************************************************
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TType
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****************************************************************************}
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procedure ttype.reset;
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begin
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def:=nil;
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sym:=nil;
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end;
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procedure ttype.setdef(p:tdef);
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begin
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def:=p;
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sym:=nil;
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end;
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procedure ttype.setsym(p:tsym);
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begin
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sym:=p;
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def:=p.gettypedef;
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if not assigned(def) then
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internalerror(1234005);
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end;
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procedure ttype.resolve;
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begin
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if assigned(sym) then
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begin
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resolvesym(sym);
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setsym(sym);
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end
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else
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resolvedef(def);
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end;
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{****************************************************************************
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TSymList
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****************************************************************************}
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constructor tsymlist.create;
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begin
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def:=nil; { needed for procedures }
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firstsym:=nil;
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lastsym:=nil;
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end;
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destructor tsymlist.destroy;
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begin
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clear;
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end;
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function tsymlist.empty:boolean;
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begin
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empty:=(firstsym=nil);
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end;
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procedure tsymlist.clear;
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var
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hp : psymlistitem;
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begin
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while assigned(firstsym) do
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begin
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hp:=firstsym;
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firstsym:=firstsym^.next;
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dispose(hp);
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end;
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firstsym:=nil;
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lastsym:=nil;
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def:=nil;
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end;
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procedure tsymlist.setdef(p:tdef);
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begin
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def:=p;
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end;
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procedure tsymlist.addsym(slt:tsltype;p:tsym);
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var
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hp : psymlistitem;
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begin
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if not assigned(p) then
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internalerror(200110203);
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new(hp);
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hp^.sltype:=slt;
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hp^.sym:=p;
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hp^.value:=0;
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hp^.next:=nil;
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if assigned(lastsym) then
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lastsym^.next:=hp
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else
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firstsym:=hp;
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lastsym:=hp;
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end;
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procedure tsymlist.addconst(slt:tsltype;v:longint);
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var
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hp : psymlistitem;
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begin
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new(hp);
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hp^.sltype:=slt;
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hp^.sym:=nil;
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hp^.value:=v;
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hp^.next:=nil;
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if assigned(lastsym) then
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lastsym^.next:=hp
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else
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firstsym:=hp;
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lastsym:=hp;
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end;
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function tsymlist.getcopy:tsymlist;
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var
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hp : tsymlist;
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hp2 : psymlistitem;
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hpn : psymlistitem;
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begin
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hp:=tsymlist.create;
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hp.def:=def;
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hp2:=firstsym;
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while assigned(hp2) do
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begin
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new(hpn);
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hpn^:=hp2^;
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hpn^.next:=nil;
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if assigned(hp.lastsym) then
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hp.lastsym^.next:=hpn
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else
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hp.firstsym:=hpn;
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hp.lastsym:=hpn;
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hp2:=hp2^.next;
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end;
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getcopy:=hp;
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end;
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procedure tsymlist.resolve;
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var
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hp : psymlistitem;
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begin
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resolvedef(def);
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hp:=firstsym;
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while assigned(hp) do
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begin
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if assigned(hp^.sym) then
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resolvesym(hp^.sym);
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hp:=hp^.next;
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end;
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end;
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{*****************************************************************************
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Symbol / Definition Resolving
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*****************************************************************************}
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procedure resolvederef(var p:tderef;var st:tsymtable;var idx:word);
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var
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hp : tderef;
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pd : tdef;
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begin
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st:=nil;
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idx:=0;
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while assigned(p) do
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begin
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case p.dereftype of
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derefaktrecordindex :
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begin
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st:=aktrecordsymtable;
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idx:=p.index;
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end;
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derefaktstaticindex :
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begin
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st:=aktstaticsymtable;
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idx:=p.index;
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end;
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derefaktlocal :
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begin
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st:=aktlocalsymtable;
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idx:=p.index;
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end;
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derefunit :
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begin
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{$ifdef NEWMAP}
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st:=tsymtable(current_module.map^[p.index]^.globalsymtable);
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{$else NEWMAP}
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st:=tsymtable(current_module.map^[p.index]);
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{$endif NEWMAP}
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end;
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derefrecord :
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begin
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pd:=tdef(st.getdefnr(p.index));
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st:=pd.getsymtable(gs_record);
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if not assigned(st) then
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internalerror(556658);
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end;
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dereflocal :
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begin
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pd:=tdef(st.getdefnr(p.index));
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st:=pd.getsymtable(gs_local);
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if not assigned(st) then
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internalerror(556658);
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end;
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derefpara :
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begin
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pd:=tdef(st.getdefnr(p.index));
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st:=pd.getsymtable(gs_para);
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if not assigned(st) then
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internalerror(556658);
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end;
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derefindex :
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begin
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idx:=p.index;
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end;
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else
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internalerror(556658);
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end;
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hp:=p;
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p:=p.next;
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hp.free;
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end;
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end;
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procedure resolvedef(var def:tdef);
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var
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st : tsymtable;
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idx : word;
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begin
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resolvederef(tderef(def),st,idx);
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if assigned(st) then
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def:=tdef(st.getdefnr(idx))
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else
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def:=nil;
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end;
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procedure resolvesym(var sym:tsym);
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var
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st : tsymtable;
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idx : word;
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begin
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resolvederef(tderef(sym),st,idx);
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if assigned(st) then
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sym:=tsym(st.getsymnr(idx))
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else
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sym:=nil;
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end;
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end.
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{
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$Log$
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Revision 1.13 2001-12-31 16:59:43 peter
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* protected/private symbols parsing fixed
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Revision 1.12 2001/11/18 18:43:18 peter
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* overloading supported in child classes
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* fixed parsing of classes with private and virtual and overloaded
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so it is compatible with delphi
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Revision 1.11 2001/11/02 22:58:08 peter
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* procsym definition rewrite
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Revision 1.10 2001/10/21 12:33:07 peter
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* array access for properties added
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Revision 1.9 2001/08/30 20:13:57 peter
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* rtti/init table updates
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* rttisym for reusable global rtti/init info
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* support published for interfaces
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Revision 1.8 2001/08/06 21:40:49 peter
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* funcret moved from tprocinfo to tprocdef
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Revision 1.7 2001/05/06 14:49:19 peter
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* ppu object to class rewrite
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* move ppu read and write stuff to fppu
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Revision 1.6 2001/04/13 01:22:17 peter
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* symtable change to classes
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* range check generation and errors fixed, make cycle DEBUG=1 works
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* memory leaks fixed
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Revision 1.5 2001/04/02 21:20:35 peter
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* resulttype rewrite
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Revision 1.4 2000/12/25 00:07:30 peter
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+ new tlinkedlist class (merge of old tstringqueue,tcontainer and
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tlinkedlist objects)
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Revision 1.3 2000/11/29 00:30:42 florian
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* unused units removed from uses clause
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* some changes for widestrings
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Revision 1.2 2000/11/07 20:48:33 peter
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* removed ref_count from pinputfile it's not used
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Revision 1.1 2000/10/31 22:02:53 peter
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* symtable splitted, no real code changes
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}
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