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8af51ea6d3
* tvarsym.localloc contains the location of para/local when
generating code for the current procedure
1138 lines
49 KiB
ObjectPascal
1138 lines
49 KiB
ObjectPascal
{
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$Id$
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Copyright (c) 1998-2002 by Florian Klaempfl
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Reads typed constants
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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 ptconst;
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{$i fpcdefs.inc}
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interface
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uses symtype,symsym;
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{ this procedure reads typed constants }
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{ sym is only needed for ansi strings }
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{ the assembler label is in the middle (PM) }
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procedure readtypedconst(const t:ttype;sym : ttypedconstsym;writable : boolean);
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implementation
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uses
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{$ifdef Delphi}
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sysutils,
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{$else}
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strings,
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{$endif Delphi}
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globtype,systems,tokens,verbose,
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cutils,globals,widestr,scanner,
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symconst,symbase,symdef,aasmbase,aasmtai,aasmcpu,defutil,defcmp,
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{ pass 1 }
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node,
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nmat,nadd,ncal,nmem,nset,ncnv,ninl,ncon,nld,nflw,
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{ parser specific stuff }
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pbase,pexpr,
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{ codegen }
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cpuinfo,cgbase
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;
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{$ifdef fpc}
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{$maxfpuregisters 0}
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{$endif fpc}
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{ this procedure reads typed constants }
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procedure readtypedconst(const t:ttype;sym : ttypedconstsym;writable : boolean);
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var
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len,base : longint;
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p,hp,hpstart : tnode;
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i,j,l,offset,
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varalign,
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strlength : longint;
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curconstsegment : TAAsmoutput;
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ll : tasmlabel;
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s,sorg : string;
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c : char;
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ca : pchar;
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tmpguid : tguid;
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aktpos : longint;
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obj : tobjectdef;
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recsym,
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srsym : tsym;
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symt : tsymtable;
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value : bestreal;
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strval : pchar;
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pw : pcompilerwidestring;
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error : boolean;
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type
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setbytes = array[0..31] of byte;
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Psetbytes = ^setbytes;
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procedure check_range(def:torddef);
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begin
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if ((tordconstnode(p).value>def.high) or
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(tordconstnode(p).value<def.low)) then
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begin
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if (cs_check_range in aktlocalswitches) then
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Message(parser_e_range_check_error)
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else
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Message(parser_w_range_check_error);
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end;
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end;
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{$R-} {Range check creates problem with init_8bit(-1) !!}
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begin
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if writable then
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curconstsegment:=datasegment
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else
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curconstsegment:=consts;
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case t.def.deftype of
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orddef:
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begin
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p:=comp_expr(true);
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case torddef(t.def).typ of
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bool8bit :
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begin
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if is_constboolnode(p) then
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curconstSegment.concat(Tai_const.Create_8bit(tordconstnode(p).value))
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else
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Message(cg_e_illegal_expression);
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end;
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bool16bit :
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begin
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if is_constboolnode(p) then
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curconstSegment.concat(Tai_const.Create_16bit(tordconstnode(p).value))
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else
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Message(cg_e_illegal_expression);
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end;
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bool32bit :
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begin
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if is_constboolnode(p) then
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value))
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else
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Message(cg_e_illegal_expression);
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end;
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uchar :
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begin
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if is_constcharnode(p) then
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curconstSegment.concat(Tai_const.Create_8bit(tordconstnode(p).value))
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else
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Message(cg_e_illegal_expression);
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end;
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uwidechar :
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begin
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if is_constcharnode(p) then
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inserttypeconv(p,cwidechartype);
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if is_constwidecharnode(p) then
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curconstSegment.concat(Tai_const.Create_16bit(tordconstnode(p).value))
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else
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Message(cg_e_illegal_expression);
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end;
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s8bit,
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u8bit :
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begin
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if is_constintnode(p) then
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begin
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curconstSegment.concat(Tai_const.Create_8bit(tordconstnode(p).value));
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check_range(torddef(t.def));
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end
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else
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Message(cg_e_illegal_expression);
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end;
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u16bit,
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s16bit :
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begin
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if is_constintnode(p) then
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begin
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curconstSegment.concat(Tai_const.Create_16bit(tordconstnode(p).value));
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check_range(torddef(t.def));
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end
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else
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Message(cg_e_illegal_expression);
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end;
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s32bit,
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u32bit :
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begin
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if is_constintnode(p) then
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begin
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value));
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if torddef(t.def).typ<>u32bit then
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check_range(torddef(t.def));
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end
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else
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Message(cg_e_illegal_expression);
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end;
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s64bit,
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u64bit:
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begin
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if is_constintnode(p) then
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begin
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if target_info.endian = endian_little then
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begin
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value and $ffffffff));
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value shr 32));
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end
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else
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begin
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value shr 32));
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curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value and $ffffffff));
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end;
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end
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else
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Message(cg_e_illegal_expression);
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end;
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else
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internalerror(3799);
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end;
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p.free;
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end;
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floatdef:
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begin
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p:=comp_expr(true);
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if is_constrealnode(p) then
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value:=trealconstnode(p).value_real
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else if is_constintnode(p) then
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value:=tordconstnode(p).value
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else
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Message(cg_e_illegal_expression);
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case tfloatdef(t.def).typ of
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s32real :
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curconstSegment.concat(Tai_real_32bit.Create(ts32real(value)));
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s64real :
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curconstSegment.concat(Tai_real_64bit.Create(ts64real(value)));
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s80real :
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curconstSegment.concat(Tai_real_80bit.Create(value));
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{$ifdef ver1_0}
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s64comp :
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curconstSegment.concat(Tai_comp_64bit.Create(value));
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{$else ver1_0}
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{ the round is necessary for native compilers where comp isn't a float }
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s64comp :
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curconstSegment.concat(Tai_comp_64bit.Create(round(value)));
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{$endif ver1_0}
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else
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internalerror(18);
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end;
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p.free;
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end;
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classrefdef:
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begin
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p:=comp_expr(true);
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case p.nodetype of
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loadvmtaddrn:
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begin
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if not(tobjectdef(tclassrefdef(p.resulttype.def).pointertype.def).is_related(
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tobjectdef(tclassrefdef(t.def).pointertype.def))) then
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Message(cg_e_illegal_expression);
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curconstSegment.concat(Tai_const_symbol.Create(objectlibrary.newasmsymboldata(tobjectdef(
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tclassrefdef(p.resulttype.def).pointertype.def).vmt_mangledname)));
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end;
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niln:
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curconstSegment.concat(Tai_const.Create_32bit(0));
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else Message(cg_e_illegal_expression);
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end;
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p.free;
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end;
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pointerdef:
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begin
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p:=comp_expr(true);
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if (p.nodetype=typeconvn) and
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(ttypeconvnode(p).left.nodetype in [addrn,niln]) and
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equal_defs(t.def,p.resulttype.def) then
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begin
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hp:=ttypeconvnode(p).left;
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ttypeconvnode(p).left:=nil;
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p.free;
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p:=hp;
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end;
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{ allows horrible ofs(typeof(TButton)^) code !! }
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if (p.nodetype=addrn) and
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(taddrnode(p).left.nodetype=derefn) then
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begin
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hp:=tderefnode(taddrnode(p).left).left;
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tderefnode(taddrnode(p).left).left:=nil;
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p.free;
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p:=hp;
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end;
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{ const pointer ? }
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if (p.nodetype = pointerconstn) then
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curconstsegment.concat(Tai_const.Create_32bit(
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tpointerconstnode(p).value))
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{ nil pointer ? }
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else if p.nodetype=niln then
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curconstSegment.concat(Tai_const.Create_32bit(0))
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{ maybe pchar ? }
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else
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if is_char(tpointerdef(t.def).pointertype.def) and
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(p.nodetype<>addrn) then
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begin
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objectlibrary.getdatalabel(ll);
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curconstSegment.concat(Tai_const_symbol.Create(ll));
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if p.nodetype=stringconstn then
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varalign:=tstringconstnode(p).len
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else
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varalign:=0;
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varalign:=const_align(varalign);
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Consts.concat(Tai_align.Create(varalign));
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Consts.concat(Tai_label.Create(ll));
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if p.nodetype=stringconstn then
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begin
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len:=tstringconstnode(p).len;
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{ For tp7 the maximum lentgh can be 255 }
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if (m_tp7 in aktmodeswitches) and
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(len>255) then
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len:=255;
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getmem(ca,len+2);
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move(tstringconstnode(p).value_str^,ca^,len+1);
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Consts.concat(Tai_string.Create_length_pchar(ca,len+1));
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end
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else
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if is_constcharnode(p) then
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Consts.concat(Tai_string.Create(char(byte(tordconstnode(p).value))+#0))
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else
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Message(cg_e_illegal_expression);
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end
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{ maybe pwidechar ? }
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else
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if is_widechar(tpointerdef(t.def).pointertype.def) and
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(p.nodetype<>addrn) then
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begin
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objectlibrary.getdatalabel(ll);
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curconstSegment.concat(Tai_const_symbol.Create(ll));
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Consts.concat(tai_align.create(const_align(pointer_size)));
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Consts.concat(Tai_label.Create(ll));
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if (p.nodetype in [stringconstn,ordconstn]) then
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begin
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{ convert to widestring stringconstn }
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inserttypeconv(p,cwidestringtype);
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if (p.nodetype=stringconstn) and
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(tstringconstnode(p).st_type=st_widestring) then
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begin
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pw:=pcompilerwidestring(tstringconstnode(p).value_str);
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for i:=0 to tstringconstnode(p).len-1 do
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Consts.concat(Tai_const.Create_16bit(pw^.data[i]));
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{ ending #0 }
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Consts.concat(Tai_const.Create_16bit(0))
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end;
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end
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else
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Message(cg_e_illegal_expression);
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end
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else
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if p.nodetype=addrn then
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begin
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inserttypeconv(p,t);
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{ if a typeconv node was inserted then check if it was an tc_equal. If
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true then we remove the node. If not tc_equal then we leave the typeconvn
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and the nodetype=loadn will always be false and generate the error (PFV) }
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if (p.nodetype=typeconvn) then
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begin
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if (ttypeconvnode(p).convtype=tc_equal) then
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hpstart:=taddrnode(ttypeconvnode(p).left).left
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else
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hpstart:=p;
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end
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else
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hpstart:=taddrnode(p).left;
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hp:=hpstart;
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while assigned(hp) and (hp.nodetype in [subscriptn,vecn]) do
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hp:=tunarynode(hp).left;
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if (hp.nodetype=loadn) then
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begin
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hp:=hpstart;
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offset:=0;
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while assigned(hp) and (hp.nodetype<>loadn) do
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begin
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case hp.nodetype of
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vecn :
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begin
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case tvecnode(hp).left.resulttype.def.deftype of
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stringdef :
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begin
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{ this seems OK for shortstring and ansistrings PM }
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{ it is wrong for widestrings !! }
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len:=1;
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base:=0;
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end;
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arraydef :
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begin
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len:=tarraydef(tvecnode(hp).left.resulttype.def).elesize;
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base:=tarraydef(tvecnode(hp).left.resulttype.def).lowrange;
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end
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else
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Message(cg_e_illegal_expression);
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end;
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if is_constintnode(tvecnode(hp).right) then
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inc(offset,len*(get_ordinal_value(tvecnode(hp).right)-base))
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else
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Message(cg_e_illegal_expression);
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end;
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subscriptn :
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inc(offset,tsubscriptnode(hp).vs.fieldoffset)
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else
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Message(cg_e_illegal_expression);
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end;
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hp:=tbinarynode(hp).left;
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end;
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srsym:=tloadnode(hp).symtableentry;
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case srsym.typ of
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procsym :
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begin
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if Tprocsym(srsym).procdef_count>1 then
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Message(parser_e_no_overloaded_procvars);
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if po_abstractmethod in tprocsym(srsym).first_procdef.procoptions then
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Message(type_e_cant_take_address_of_abstract_method)
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else
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curconstSegment.concat(Tai_const_symbol.Createname_offset(tprocsym(srsym).first_procdef.mangledname,offset));
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end;
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varsym :
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curconstSegment.concat(Tai_const_symbol.Createname_offset(tvarsym(srsym).mangledname,offset));
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typedconstsym :
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curconstSegment.concat(Tai_const_symbol.Createname_offset(ttypedconstsym(srsym).mangledname,offset));
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else
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Message(type_e_variable_id_expected);
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end;
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end
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else
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Message(cg_e_illegal_expression);
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end
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else
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{ allow typeof(Object type)}
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if (p.nodetype=inlinen) and
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(tinlinenode(p).inlinenumber=in_typeof_x) then
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begin
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if (tinlinenode(p).left.nodetype=typen) then
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begin
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curconstSegment.concat(Tai_const_symbol.createname(
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tobjectdef(tinlinenode(p).left.resulttype.def).vmt_mangledname));
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end
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else
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Message(cg_e_illegal_expression);
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end
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else
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Message(cg_e_illegal_expression);
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p.free;
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end;
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setdef:
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begin
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p:=comp_expr(true);
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if p.nodetype=setconstn then
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begin
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{ be sure to convert to the correct result, else
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it can generate smallset data instead of normalset (PFV) }
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inserttypeconv(p,t);
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{ we only allow const sets }
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if assigned(tsetconstnode(p).left) then
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Message(cg_e_illegal_expression)
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else
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begin
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{ this writing is endian independant }
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{ untrue - because they are considered }
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{ arrays of 32-bit values CEC }
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if source_info.endian = target_info.endian then
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begin
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for l:=0 to p.resulttype.def.size-1 do
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curconstsegment.concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[l]));
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end
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else
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begin
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{ store as longint values in swaped format }
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j:=0;
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for l:=0 to ((p.resulttype.def.size-1) div 4) do
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begin
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curconstsegment.concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+3]));
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curconstsegment.concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+2]));
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curconstsegment.concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+1]));
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curconstsegment.concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j]));
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Inc(j,4);
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end;
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end;
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end;
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end
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else
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Message(cg_e_illegal_expression);
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p.free;
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end;
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enumdef:
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begin
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p:=comp_expr(true);
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if p.nodetype=ordconstn then
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begin
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if equal_defs(p.resulttype.def,t.def) or
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is_subequal(p.resulttype.def,t.def) then
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begin
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case p.resulttype.def.size of
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1 : curconstSegment.concat(Tai_const.Create_8bit(tordconstnode(p).value));
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2 : curconstSegment.concat(Tai_const.Create_16bit(tordconstnode(p).value));
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4 : curconstSegment.concat(Tai_const.Create_32bit(tordconstnode(p).value));
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end;
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end
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else
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Message2(type_e_incompatible_types,t.def.typename,p.resulttype.def.typename);
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end
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else
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Message(cg_e_illegal_expression);
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p.free;
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end;
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stringdef:
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begin
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p:=comp_expr(true);
|
|
{ load strval and strlength of the constant tree }
|
|
if p.nodetype=stringconstn then
|
|
begin
|
|
{ convert to the expected string type so that
|
|
for widestrings strval is a pcompilerwidestring }
|
|
inserttypeconv(p,t);
|
|
strlength:=tstringconstnode(p).len;
|
|
strval:=tstringconstnode(p).value_str;
|
|
end
|
|
else if is_constcharnode(p) then
|
|
begin
|
|
{ strval:=pchar(@tordconstnode(p).value);
|
|
THIS FAIL on BIG_ENDIAN MACHINES PM }
|
|
c:=chr(tordconstnode(p).value and $ff);
|
|
strval:=@c;
|
|
strlength:=1
|
|
end
|
|
else if is_constresourcestringnode(p) then
|
|
begin
|
|
strval:=pchar(tconstsym(tloadnode(p).symtableentry).value.valueptr);
|
|
strlength:=tconstsym(tloadnode(p).symtableentry).value.len;
|
|
end
|
|
else
|
|
begin
|
|
Message(cg_e_illegal_expression);
|
|
strlength:=-1;
|
|
end;
|
|
if strlength>=0 then
|
|
begin
|
|
case tstringdef(t.def).string_typ of
|
|
st_shortstring:
|
|
begin
|
|
if strlength>=t.def.size then
|
|
begin
|
|
message2(parser_w_string_too_long,strpas(strval),tostr(t.def.size-1));
|
|
strlength:=t.def.size-1;
|
|
end;
|
|
curconstSegment.concat(Tai_const.Create_8bit(strlength));
|
|
{ this can also handle longer strings }
|
|
getmem(ca,strlength+1);
|
|
move(strval^,ca^,strlength);
|
|
ca[strlength]:=#0;
|
|
curconstSegment.concat(Tai_string.Create_length_pchar(ca,strlength));
|
|
{ fillup with spaces if size is shorter }
|
|
if t.def.size>strlength then
|
|
begin
|
|
getmem(ca,t.def.size-strlength);
|
|
{ def.size contains also the leading length, so we }
|
|
{ we have to subtract one }
|
|
fillchar(ca[0],t.def.size-strlength-1,' ');
|
|
ca[t.def.size-strlength-1]:=#0;
|
|
{ this can also handle longer strings }
|
|
curconstSegment.concat(Tai_string.Create_length_pchar(ca,t.def.size-strlength-1));
|
|
end;
|
|
end;
|
|
st_ansistring:
|
|
begin
|
|
{ an empty ansi string is nil! }
|
|
if (strlength=0) then
|
|
curconstSegment.concat(Tai_const.Create_32bit(0))
|
|
else
|
|
begin
|
|
objectlibrary.getdatalabel(ll);
|
|
curconstSegment.concat(Tai_const_symbol.Create(ll));
|
|
{ the actual structure starts at -12 from start label - CEC }
|
|
Consts.concat(tai_align.create(const_align(pointer_size)));
|
|
{ first write the maximum size }
|
|
Consts.concat(Tai_const.Create_32bit(strlength));
|
|
{ second write the real length }
|
|
Consts.concat(Tai_const.Create_32bit(strlength));
|
|
{ redondent with maxlength but who knows ... (PM) }
|
|
{ third write use count (set to -1 for safety ) }
|
|
Consts.concat(Tai_const.Create_32bit(-1));
|
|
Consts.concat(Tai_label.Create(ll));
|
|
getmem(ca,strlength+2);
|
|
move(strval^,ca^,strlength);
|
|
{ The terminating #0 to be stored in the .data section (JM) }
|
|
ca[strlength]:=#0;
|
|
{ End of the PChar. The memory has to be allocated because in }
|
|
{ tai_string.done, there is a freemem(len+1) (JM) }
|
|
ca[strlength+1]:=#0;
|
|
Consts.concat(Tai_string.Create_length_pchar(ca,strlength+1));
|
|
end;
|
|
end;
|
|
st_widestring:
|
|
begin
|
|
{ an empty ansi string is nil! }
|
|
if (strlength=0) then
|
|
curconstSegment.concat(Tai_const.Create_32bit(0))
|
|
else
|
|
begin
|
|
objectlibrary.getdatalabel(ll);
|
|
curconstSegment.concat(Tai_const_symbol.Create(ll));
|
|
{ the actual structure starts at -12 from start label - CEC }
|
|
Consts.concat(tai_align.create(const_align(pointer_size)));
|
|
Consts.concat(Tai_const.Create_32bit(strlength));
|
|
Consts.concat(Tai_const.Create_32bit(strlength));
|
|
Consts.concat(Tai_const.Create_32bit(-1));
|
|
Consts.concat(Tai_label.Create(ll));
|
|
for i:=0 to strlength-1 do
|
|
Consts.concat(Tai_const.Create_16bit(pcompilerwidestring(strval)^.data[i]));
|
|
{ ending #0 }
|
|
Consts.concat(Tai_const.Create_16bit(0))
|
|
end;
|
|
end;
|
|
st_longstring:
|
|
begin
|
|
internalerror(200107081);
|
|
{curconstSegment.concat(Tai_const.Create_32bit(strlength))));
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
getmem(ca,strlength+1);
|
|
move(strval^,ca^,strlength);
|
|
ca[strlength]:=#0;
|
|
generate_pascii(consts,ca,strlength);
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));}
|
|
end;
|
|
end;
|
|
end;
|
|
p.free;
|
|
end;
|
|
arraydef:
|
|
begin
|
|
if try_to_consume(_LKLAMMER) then
|
|
begin
|
|
for l:=tarraydef(t.def).lowrange to tarraydef(t.def).highrange-1 do
|
|
begin
|
|
readtypedconst(tarraydef(t.def).elementtype,nil,writable);
|
|
consume(_COMMA);
|
|
end;
|
|
readtypedconst(tarraydef(t.def).elementtype,nil,writable);
|
|
consume(_RKLAMMER);
|
|
end
|
|
else
|
|
{ if array of char then we allow also a string }
|
|
if is_char(tarraydef(t.def).elementtype.def) then
|
|
begin
|
|
p:=comp_expr(true);
|
|
if p.nodetype=stringconstn then
|
|
begin
|
|
len:=tstringconstnode(p).len;
|
|
{ For tp7 the maximum lentgh can be 255 }
|
|
if (m_tp7 in aktmodeswitches) and
|
|
(len>255) then
|
|
len:=255;
|
|
ca:=tstringconstnode(p).value_str;
|
|
end
|
|
else
|
|
if is_constcharnode(p) then
|
|
begin
|
|
c:=chr(tordconstnode(p).value and $ff);
|
|
ca:=@c;
|
|
len:=1;
|
|
end
|
|
else
|
|
begin
|
|
Message(cg_e_illegal_expression);
|
|
len:=0;
|
|
end;
|
|
if len>(tarraydef(t.def).highrange-tarraydef(t.def).lowrange+1) then
|
|
Message(parser_e_string_larger_array);
|
|
for i:=tarraydef(t.def).lowrange to tarraydef(t.def).highrange do
|
|
begin
|
|
if i+1-tarraydef(t.def).lowrange<=len then
|
|
begin
|
|
curconstSegment.concat(Tai_const.Create_8bit(byte(ca^)));
|
|
inc(ca);
|
|
end
|
|
else
|
|
{Fill the remaining positions with #0.}
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
end;
|
|
p.free;
|
|
end
|
|
else
|
|
{ dynamic array nil }
|
|
if is_dynamic_array(t.def) then
|
|
begin
|
|
{ Only allow nil initialization }
|
|
consume(_NIL);
|
|
curconstSegment.concat(Tai_const.Create_32bit(0));
|
|
end
|
|
else
|
|
begin
|
|
{ we want the ( }
|
|
consume(_LKLAMMER);
|
|
end;
|
|
end;
|
|
procvardef:
|
|
begin
|
|
{ Procvars and pointers are no longer compatible. }
|
|
{ under tp: =nil or =var under fpc: =nil or =@var }
|
|
if token=_NIL then
|
|
begin
|
|
curconstSegment.concat(Tai_const.Create_32bit(0));
|
|
if (po_methodpointer in tprocvardef(t.def).procoptions) then
|
|
curconstSegment.concat(Tai_const.Create_32bit(0));
|
|
consume(_NIL);
|
|
exit;
|
|
end;
|
|
{ you can't assign a value other than NIL to a typed constant }
|
|
{ which is a "procedure of object", because this also requires }
|
|
{ address of an object/class instance, which is not known at }
|
|
{ compile time (JM) }
|
|
if (po_methodpointer in tprocvardef(t.def).procoptions) then
|
|
Message(parser_e_no_procvarobj_const);
|
|
{ parse the rest too, so we can continue with error checking }
|
|
getprocvardef:=tprocvardef(t.def);
|
|
p:=comp_expr(true);
|
|
getprocvardef:=nil;
|
|
if codegenerror then
|
|
begin
|
|
p.free;
|
|
exit;
|
|
end;
|
|
{ let type conversion check everything needed }
|
|
inserttypeconv(p,t);
|
|
if codegenerror then
|
|
begin
|
|
p.free;
|
|
exit;
|
|
end;
|
|
{ remove typeconvn, that will normally insert a lea
|
|
instruction which is not necessary for us }
|
|
if p.nodetype=typeconvn then
|
|
begin
|
|
hp:=ttypeconvnode(p).left;
|
|
ttypeconvnode(p).left:=nil;
|
|
p.free;
|
|
p:=hp;
|
|
end;
|
|
{ remove addrn which we also don't need here }
|
|
if p.nodetype=addrn then
|
|
begin
|
|
hp:=taddrnode(p).left;
|
|
taddrnode(p).left:=nil;
|
|
p.free;
|
|
p:=hp;
|
|
end;
|
|
{ we now need to have a loadn with a procsym }
|
|
if (p.nodetype=loadn) and
|
|
(tloadnode(p).symtableentry.typ=procsym) then
|
|
begin
|
|
curconstSegment.concat(Tai_const_symbol.createname(
|
|
tprocsym(tloadnode(p).symtableentry).first_procdef.mangledname));
|
|
end
|
|
else
|
|
Message(cg_e_illegal_expression);
|
|
p.free;
|
|
end;
|
|
{ reads a typed constant record }
|
|
recorddef:
|
|
begin
|
|
{ KAZ }
|
|
if (trecorddef(t.def)=rec_tguid) and
|
|
((token=_CSTRING) or (token=_CCHAR) or (token=_ID)) then
|
|
begin
|
|
p:=comp_expr(true);
|
|
inserttypeconv(p,cshortstringtype);
|
|
if p.nodetype=stringconstn then
|
|
begin
|
|
s:=strpas(tstringconstnode(p).value_str);
|
|
p.free;
|
|
if string2guid(s,tmpguid) then
|
|
begin
|
|
curconstSegment.concat(Tai_const.Create_32bit(tmpguid.D1));
|
|
curconstSegment.concat(Tai_const.Create_16bit(tmpguid.D2));
|
|
curconstSegment.concat(Tai_const.Create_16bit(tmpguid.D3));
|
|
for i:=Low(tmpguid.D4) to High(tmpguid.D4) do
|
|
curconstSegment.concat(Tai_const.Create_8bit(tmpguid.D4[i]));
|
|
end
|
|
else
|
|
Message(parser_e_improper_guid_syntax);
|
|
end
|
|
else
|
|
begin
|
|
p.free;
|
|
Message(cg_e_illegal_expression);
|
|
exit;
|
|
end;
|
|
end
|
|
else
|
|
begin
|
|
consume(_LKLAMMER);
|
|
sorg:='';
|
|
aktpos:=0;
|
|
srsym := tsym(trecorddef(t.def).symtable.symindex.first);
|
|
recsym := nil;
|
|
while token<>_RKLAMMER do
|
|
begin
|
|
s:=pattern;
|
|
sorg:=orgpattern;
|
|
consume(_ID);
|
|
consume(_COLON);
|
|
error := false;
|
|
recsym := tsym(trecorddef(t.def).symtable.search(s));
|
|
if not assigned(recsym) then
|
|
begin
|
|
Message1(sym_e_illegal_field,sorg);
|
|
error := true;
|
|
end;
|
|
if (not error) and
|
|
(not assigned(srsym) or
|
|
(s <> srsym.name)) then
|
|
{ possible variant record (JM) }
|
|
begin
|
|
{ All parts of a variant start at the same offset }
|
|
{ Also allow jumping from one variant part to another, }
|
|
{ as long as the offsets match }
|
|
if (assigned(srsym) and
|
|
(tvarsym(recsym).fieldoffset = tvarsym(srsym).fieldoffset)) or
|
|
{ srsym is not assigned after parsing w2 in the }
|
|
{ typed const in the next example: }
|
|
{ type tr = record case byte of }
|
|
{ 1: (l1,l2: dword); }
|
|
{ 2: (w1,w2: word); }
|
|
{ end; }
|
|
{ const r: tr = (w1:1;w2:1;l2:5); }
|
|
(tvarsym(recsym).fieldoffset = aktpos) then
|
|
srsym := recsym
|
|
{ going backwards isn't allowed in any mode }
|
|
else if (tvarsym(recsym).fieldoffset<aktpos) then
|
|
begin
|
|
Message(parser_e_invalid_record_const);
|
|
error := true;
|
|
end
|
|
{ Delphi allows you to skip fields }
|
|
else if (m_delphi in aktmodeswitches) then
|
|
begin
|
|
Message1(parser_w_skipped_fields_before,sorg);
|
|
srsym := recsym;
|
|
end
|
|
{ FPC and TP don't }
|
|
else
|
|
begin
|
|
Message1(parser_e_skipped_fields_before,sorg);
|
|
error := true;
|
|
end;
|
|
end;
|
|
if error then
|
|
consume_all_until(_SEMICOLON)
|
|
else
|
|
begin
|
|
|
|
{ if needed fill (alignment) }
|
|
if tvarsym(srsym).fieldoffset>aktpos then
|
|
for i:=1 to tvarsym(srsym).fieldoffset-aktpos do
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
|
|
{ new position }
|
|
aktpos:=tvarsym(srsym).fieldoffset+tvarsym(srsym).vartype.def.size;
|
|
|
|
{ read the data }
|
|
readtypedconst(tvarsym(srsym).vartype,nil,writable);
|
|
|
|
{ keep previous field for checking whether whole }
|
|
{ record was initialized (JM) }
|
|
recsym := srsym;
|
|
{ goto next field }
|
|
srsym := tsym(srsym.indexnext);
|
|
|
|
if token=_SEMICOLON then
|
|
consume(_SEMICOLON)
|
|
else break;
|
|
end;
|
|
end;
|
|
|
|
{ are there any fields left? }
|
|
if assigned(srsym) and
|
|
{ don't complain if there only come other variant parts }
|
|
{ after the last initialized field }
|
|
((recsym=nil) or
|
|
(tvarsym(srsym).fieldoffset > tvarsym(recsym).fieldoffset)) then
|
|
Message1(parser_w_skipped_fields_after,sorg);
|
|
|
|
for i:=1 to t.def.size-aktpos do
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
|
|
consume(_RKLAMMER);
|
|
end;
|
|
end;
|
|
{ reads a typed object }
|
|
objectdef:
|
|
begin
|
|
if is_class_or_interface(t.def) then
|
|
begin
|
|
p:=comp_expr(true);
|
|
if p.nodetype<>niln then
|
|
begin
|
|
Message(parser_e_type_const_not_possible);
|
|
consume_all_until(_RKLAMMER);
|
|
end
|
|
else
|
|
begin
|
|
curconstSegment.concat(Tai_const.Create_32bit(0));
|
|
end;
|
|
p.free;
|
|
end
|
|
{ for objects we allow it only if it doesn't contain a vmt }
|
|
else if (oo_has_vmt in tobjectdef(t.def).objectoptions) and
|
|
(m_fpc in aktmodeswitches) then
|
|
Message(parser_e_type_const_not_possible)
|
|
else
|
|
begin
|
|
consume(_LKLAMMER);
|
|
aktpos:=0;
|
|
while token<>_RKLAMMER do
|
|
begin
|
|
s:=pattern;
|
|
sorg:=orgpattern;
|
|
consume(_ID);
|
|
consume(_COLON);
|
|
srsym:=nil;
|
|
obj:=tobjectdef(t.def);
|
|
symt:=obj.symtable;
|
|
while (srsym=nil) and assigned(symt) do
|
|
begin
|
|
srsym:=tsym(symt.search(s));
|
|
if assigned(obj) then
|
|
obj:=obj.childof;
|
|
if assigned(obj) then
|
|
symt:=obj.symtable
|
|
else
|
|
symt:=nil;
|
|
end;
|
|
|
|
if srsym=nil then
|
|
begin
|
|
Message1(sym_e_id_not_found,sorg);
|
|
consume_all_until(_SEMICOLON);
|
|
end
|
|
else
|
|
begin
|
|
{ check position }
|
|
if tvarsym(srsym).fieldoffset<aktpos then
|
|
Message(parser_e_invalid_record_const);
|
|
|
|
{ check in VMT needs to be added for TP mode }
|
|
if not(m_fpc in aktmodeswitches) and
|
|
(oo_has_vmt in tobjectdef(t.def).objectoptions) and
|
|
(tobjectdef(t.def).vmt_offset<tvarsym(srsym).fieldoffset) then
|
|
begin
|
|
for i:=1 to tobjectdef(t.def).vmt_offset-aktpos do
|
|
curconstsegment.concat(tai_const.create_8bit(0));
|
|
curconstsegment.concat(tai_const_symbol.createname(tobjectdef(t.def).vmt_mangledname));
|
|
{ this is more general }
|
|
aktpos:=tobjectdef(t.def).vmt_offset + pointer_size;
|
|
end;
|
|
|
|
{ if needed fill }
|
|
if tvarsym(srsym).fieldoffset>aktpos then
|
|
for i:=1 to tvarsym(srsym).fieldoffset-aktpos do
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
|
|
{ new position }
|
|
aktpos:=tvarsym(srsym).fieldoffset+tvarsym(srsym).vartype.def.size;
|
|
|
|
{ read the data }
|
|
readtypedconst(tvarsym(srsym).vartype,nil,writable);
|
|
|
|
if token=_SEMICOLON then
|
|
consume(_SEMICOLON)
|
|
else break;
|
|
end;
|
|
end;
|
|
if not(m_fpc in aktmodeswitches) and
|
|
(oo_has_vmt in tobjectdef(t.def).objectoptions) and
|
|
(tobjectdef(t.def).vmt_offset>=aktpos) then
|
|
begin
|
|
for i:=1 to tobjectdef(t.def).vmt_offset-aktpos do
|
|
curconstsegment.concat(tai_const.create_8bit(0));
|
|
curconstsegment.concat(tai_const_symbol.createname(tobjectdef(t.def).vmt_mangledname));
|
|
{ this is more general }
|
|
aktpos:=tobjectdef(t.def).vmt_offset + pointer_size;
|
|
end;
|
|
for i:=1 to t.def.size-aktpos do
|
|
curconstSegment.concat(Tai_const.Create_8bit(0));
|
|
consume(_RKLAMMER);
|
|
end;
|
|
end;
|
|
errordef:
|
|
begin
|
|
{ try to consume something useful }
|
|
if token=_LKLAMMER then
|
|
consume_all_until(_RKLAMMER)
|
|
else
|
|
consume_all_until(_SEMICOLON);
|
|
end;
|
|
else Message(parser_e_type_const_not_possible);
|
|
end;
|
|
end;
|
|
{$ifdef fpc}
|
|
{$maxfpuregisters default}
|
|
{$endif fpc}
|
|
|
|
end.
|
|
{
|
|
$Log$
|
|
Revision 1.71 2003-09-23 17:56:06 peter
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* locals and paras are allocated in the code generation
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* tvarsym.localloc contains the location of para/local when
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generating code for the current procedure
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Revision 1.70 2003/09/03 15:55:01 peter
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* NEWRA branch merged
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Revision 1.69 2003/05/09 17:47:03 peter
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* self moved to hidden parameter
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* removed hdisposen,hnewn,selfn
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Revision 1.68 2003/04/30 20:53:32 florian
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* error when address of an abstract method is taken
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* fixed some x86-64 problems
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* merged some more x86-64 and i386 code
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Revision 1.67 2003/04/24 22:29:58 florian
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* fixed a lot of PowerPC related stuff
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Revision 1.66 2003/04/06 21:11:23 olle
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* changed newasmsymbol to newasmsymboldata for data symbols
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Revision 1.65 2003/03/17 21:42:32 peter
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* allow nil initialization of dynamic array
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Revision 1.64 2003/01/02 20:45:08 peter
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* fix uninited var
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Revision 1.63 2002/12/26 12:34:54 florian
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* fixed support for type widechar consts
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Revision 1.62 2002/12/07 14:15:33 carl
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+ add some explicit typecasts to remove some warnings
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Revision 1.61 2002/11/25 18:43:33 carl
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- removed the invalid if <> checking (Delphi is strange on this)
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+ implemented abstract warning on instance creation of class with
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abstract methods.
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* some error message cleanups
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Revision 1.60 2002/11/25 17:43:23 peter
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* splitted defbase in defutil,symutil,defcmp
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* merged isconvertable and is_equal into compare_defs(_ext)
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* made operator search faster by walking the list only once
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Revision 1.59 2002/11/22 22:48:10 carl
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* memory optimization with tconstsym (1.5%)
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Revision 1.58 2002/11/09 15:31:57 carl
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+ align ansi/wide string constants
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Revision 1.57 2002/09/06 19:58:31 carl
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* start bugfix 1996
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* 64-bit typed constant now work correctly and fully (bugfix 2001)
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Revision 1.56 2002/09/03 16:26:27 daniel
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* Make Tprocdef.defs protected
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Revision 1.55 2002/08/11 14:32:27 peter
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* renamed current_library to objectlibrary
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Revision 1.54 2002/08/11 13:24:13 peter
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* saving of asmsymbols in ppu supported
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* asmsymbollist global is removed and moved into a new class
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tasmlibrarydata that will hold the info of a .a file which
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corresponds with a single module. Added librarydata to tmodule
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to keep the library info stored for the module. In the future the
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objectfiles will also be stored to the tasmlibrarydata class
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* all getlabel/newasmsymbol and friends are moved to the new class
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Revision 1.53 2002/07/23 12:34:30 daniel
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* Readded old set code. To use it define 'oldset'. Activated by default
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for ppc.
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Revision 1.52 2002/07/22 11:48:04 daniel
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* Sets are now internally sets.
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Revision 1.51 2002/07/20 11:57:56 florian
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* types.pas renamed to defbase.pas because D6 contains a types
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unit so this would conflicts if D6 programms are compiled
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+ Willamette/SSE2 instructions to assembler added
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Revision 1.50 2002/07/01 18:46:25 peter
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* internal linker
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* reorganized aasm layer
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Revision 1.49 2002/05/18 13:34:16 peter
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* readded missing revisions
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Revision 1.48 2002/05/16 19:46:44 carl
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+ defines.inc -> fpcdefs.inc to avoid conflicts if compiling by hand
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+ try to fix temp allocation (still in ifdef)
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+ generic constructor calls
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+ start of tassembler / tmodulebase class cleanup
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Revision 1.46 2002/05/12 16:53:09 peter
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* moved entry and exitcode to ncgutil and cgobj
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* foreach gets extra argument for passing local data to the
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iterator function
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* -CR checks also class typecasts at runtime by changing them
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into as
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* fixed compiler to cycle with the -CR option
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* fixed stabs with elf writer, finally the global variables can
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be watched
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* removed a lot of routines from cga unit and replaced them by
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calls to cgobj
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* u32bit-s32bit updates for and,or,xor nodes. When one element is
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u32bit then the other is typecasted also to u32bit without giving
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a rangecheck warning/error.
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* fixed pascal calling method with reversing also the high tree in
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the parast, detected by tcalcst3 test
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Revision 1.45 2002/04/23 19:16:35 peter
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* add pinline unit that inserts compiler supported functions using
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one or more statements
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* moved finalize and setlength from ninl to pinline
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Revision 1.44 2002/04/20 21:32:24 carl
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+ generic FPC_CHECKPOINTER
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+ first parameter offset in stack now portable
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* rename some constants
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+ move some cpu stuff to other units
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- remove unused constents
|
|
* fix stacksize for some targets
|
|
* fix generic size problems which depend now on EXTEND_SIZE constant
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Revision 1.43 2002/04/15 19:01:53 carl
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+ target_info.size_of_pointer -> pointer_Size
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Revision 1.42 2002/04/04 19:06:03 peter
|
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* removed unused units
|
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* use tlocation.size in cg.a_*loc*() routines
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Revision 1.41 2002/01/24 18:25:49 peter
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* implicit result variable generation for assembler routines
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* removed m_tp modeswitch, use m_tp7 or not(m_fpc) instead
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Revision 1.40 2002/01/06 21:47:32 peter
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* removed getprocvar, use only getprocvardef
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}
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