mirror of
https://gitlab.com/freepascal.org/fpc/source.git
synced 2025-04-12 08:30:25 +02:00
28381b1287
+ added automatic definition of FPC_REQUIRES_PROPER_ALIGNMENT define for PowerPC64 target git-svn-id: trunk@1278 -
1034 lines
45 KiB
ObjectPascal
1034 lines
45 KiB
ObjectPascal
{
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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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{$i fpcdefs.inc}
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interface
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uses symtype,symsym;
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{ this procedure reads typed constants }
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{ sym is only needed for ansi strings }
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{ the assembler label is in the middle (PM) }
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procedure readtypedconst(const t:ttype;sym : ttypedconstsym;writable : boolean);
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implementation
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uses
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strings,
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globtype,systems,tokens,verbose,
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cutils,globals,widestr,scanner,
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symconst,symbase,symdef,symtable,
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aasmbase,aasmtai,aasmcpu,defutil,defcmp,
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{ pass 1 }
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node,htypechk,procinfo,
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nmat,nadd,ncal,nmem,nset,ncnv,ninl,ncon,nld,nflw,
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{ parser specific stuff }
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pbase,pexpr,
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{ codegen }
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cpuinfo,cgbase,dbgbase
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;
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{$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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label
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myexit;
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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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var
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len,base : longint;
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p,hp : tnode;
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i,j,l,
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varalign : longint;
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offset,
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strlength : aint;
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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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intvalue : tconstexprint;
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strval : pchar;
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pw : pcompilerwidestring;
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error : boolean;
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old_block_type : tblock_type;
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storefilepos : tfileposinfo;
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cursectype : TAsmSectionType;
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cural : tasmlist;
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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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begin
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old_block_type:=block_type;
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block_type:=bt_const;
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if writable then
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begin
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cural:=al_typedconsts;
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cursectype:=sec_data;
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end
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else
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begin
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cural:=al_rotypedconsts;
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cursectype:=sec_rodata;
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end;
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{ Add symbol name if this is specified. For array
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elements sym=nil and we should skip this }
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if assigned(sym) then
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begin
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storefilepos:=aktfilepos;
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aktfilepos:=sym.fileinfo;
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{ insert cut for smartlinking or alignment }
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l:=sym.getsize;
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maybe_new_object_file(asmlist[cural]);
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new_section(asmlist[cural],cursectype,lower(sym.mangledname),const_align(l));
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if (cs_debuginfo in aktmoduleswitches) then
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debuginfo.insertsym(asmlist[cural],sym);
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if (sym.owner.symtabletype=globalsymtable) or
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maybe_smartlink_symbol or
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(assigned(current_procinfo) and
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(po_inline in current_procinfo.procdef.procoptions)) or
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DLLSource then
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asmlist[cural].concat(Tai_symbol.Createname_global(sym.mangledname,AT_DATA,l))
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else
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asmlist[cural].concat(Tai_symbol.Createname(sym.mangledname,AT_DATA,l));
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aktfilepos:=storefilepos;
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end;
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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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asmlist[cural].concat(Tai_const.Create_8bit(byte(tordconstnode(p).value)))
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else
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Message(parser_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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asmlist[cural].concat(Tai_const.Create_16bit(word(tordconstnode(p).value)))
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else
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Message(parser_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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asmlist[cural].concat(Tai_const.Create_32bit(longint(tordconstnode(p).value)))
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else
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Message(parser_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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asmlist[cural].concat(Tai_const.Create_8bit(byte(tordconstnode(p).value)))
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else
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Message(parser_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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asmlist[cural].concat(Tai_const.Create_16bit(word(tordconstnode(p).value)))
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else
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Message(parser_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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asmlist[cural].concat(Tai_const.Create_8bit(byte(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(parser_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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asmlist[cural].concat(Tai_const.Create_16bit(word(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(parser_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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asmlist[cural].concat(Tai_const.Create_32bit(longint(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(parser_e_illegal_expression);
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end;
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s64bit,
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u64bit,
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scurrency:
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begin
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if is_constintnode(p) then
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intvalue := tordconstnode(p).value
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else if is_constrealnode(p) and
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(torddef(t.def).typ=scurrency)
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{ allow bootstrapping }
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then
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begin
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intvalue:=round(trealconstnode(p).value_real*10000);
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end
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else
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begin
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intvalue:=0;
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Message(parser_e_illegal_expression);
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end;
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asmlist[cural].concat(Tai_const.Create_64bit(intvalue));
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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(parser_e_illegal_expression);
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case tfloatdef(t.def).typ of
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s32real :
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asmlist[cural].concat(Tai_real_32bit.Create(ts32real(value)));
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s64real :
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{$ifdef ARM}
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if aktfputype in [fpu_fpa,fpu_fpa10,fpu_fpa11] then
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asmlist[cural].concat(Tai_real_64bit.Create_hiloswapped(ts64real(value)))
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else
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{$endif ARM}
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asmlist[cural].concat(Tai_real_64bit.Create(ts64real(value)));
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s80real :
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asmlist[cural].concat(Tai_real_80bit.Create(value));
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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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asmlist[cural].concat(Tai_comp_64bit.Create(round(value)));
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s64currency:
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asmlist[cural].concat(Tai_comp_64bit.Create(round(value*10000)));
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s128real:
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asmlist[cural].concat(Tai_real_128bit.Create(value));
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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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with Tclassrefdef(p.resulttype.def) do
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begin
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if not Tobjectdef(pointertype.def).is_related(Tobjectdef(pointertype.def)) then
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message(parser_e_illegal_expression);
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asmlist[cural].concat(Tai_const.Create_sym(objectlibrary.newasmsymbol(
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Tobjectdef(pointertype.def).vmt_mangledname,AB_EXTERNAL,AT_DATA)));
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end;
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niln:
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asmlist[cural].concat(Tai_const.Create_sym(nil));
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else Message(parser_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) then
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with Ttypeconvnode(p) do
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if (left.nodetype in [addrn,niln]) and equal_defs(t.def,p.resulttype.def) then
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begin
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hp:=left;
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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) then
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with Taddrnode(p) do
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if left.nodetype=derefn then
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begin
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hp:=tderefnode(left).left;
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tderefnode(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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begin
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if sizeof(TConstPtrUInt)=8 then
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asmlist[cural].concat(Tai_const.Create_64bit(TConstPtrUInt(tpointerconstnode(p).value)))
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else
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if sizeof(TConstPtrUInt)=4 then
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asmlist[cural].concat(Tai_const.Create_32bit(TConstPtrUInt(tpointerconstnode(p).value)))
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else
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internalerror(200404122);
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end
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{ nil pointer ? }
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else if p.nodetype=niln then
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asmlist[cural].concat(Tai_const.Create_sym(nil))
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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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asmlist[cural].concat(Tai_const.Create_sym(ll));
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if p.nodetype=stringconstn then
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varalign:=size_2_align(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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asmlist[al_const].concat(Tai_align.Create(varalign));
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asmlist[al_const].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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asmlist[al_const].concat(Tai_string.Create_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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asmlist[al_const].concat(Tai_string.Create(char(byte(tordconstnode(p).value))+#0))
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else
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message(parser_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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asmlist[cural].concat(Tai_const.Create_sym(ll));
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asmlist[al_typedconsts].concat(tai_align.create(const_align(sizeof(aint))));
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asmlist[al_typedconsts].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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asmlist[al_typedconsts].concat(Tai_const.Create_16bit(pw^.data[i]));
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{ ending #0 }
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asmlist[al_typedconsts].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(parser_e_illegal_expression);
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end
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else
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if (p.nodetype=addrn) or
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is_procvar_load(p) then
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begin
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{ insert typeconv }
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inserttypeconv(p,t);
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hp:=p;
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while assigned(hp) and (hp.nodetype in [addrn,typeconvn,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:=p;
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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(parser_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(parser_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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typeconvn :
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begin
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if not(ttypeconvnode(hp).convtype in [tc_equal,tc_proc_2_procvar]) then
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Message(parser_e_illegal_expression);
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end;
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addrn :
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;
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else
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Message(parser_e_illegal_expression);
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end;
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hp:=tunarynode(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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asmlist[cural].concat(Tai_const.Createname(tprocsym(srsym).first_procdef.mangledname,AT_FUNCTION,offset));
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end;
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globalvarsym :
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asmlist[cural].concat(Tai_const.Createname(tglobalvarsym(srsym).mangledname,AT_DATA,offset));
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typedconstsym :
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asmlist[cural].concat(Tai_const.Createname(ttypedconstsym(srsym).mangledname,AT_DATA,offset));
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labelsym :
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asmlist[cural].concat(Tai_const.Createname(tlabelsym(srsym).mangledname,AT_LABEL,offset));
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constsym :
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if tconstsym(srsym).consttyp=constresourcestring then
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asmlist[cural].concat(Tai_const.Createname(make_mangledname('RESOURCESTRINGLIST',tconstsym(srsym).owner,''),AT_DATA,tconstsym(srsym).resstrindex*(4+sizeof(aint)*3)+4+sizeof(aint)))
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else
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Message(type_e_variable_id_expected);
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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(parser_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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asmlist[cural].concat(Tai_const.createname(
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tobjectdef(tinlinenode(p).left.resulttype.def).vmt_mangledname,AT_DATA,0));
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end
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else
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Message(parser_e_illegal_expression);
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end
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else
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Message(parser_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
|
|
{ be sure to convert to the correct result, else
|
|
it can generate smallset data instead of normalset (PFV) }
|
|
inserttypeconv(p,t);
|
|
{ we only allow const sets }
|
|
if assigned(tsetconstnode(p).left) then
|
|
Message(parser_e_illegal_expression)
|
|
else
|
|
begin
|
|
{ this writing is endian independant }
|
|
{ untrue - because they are considered }
|
|
{ arrays of 32-bit values CEC }
|
|
|
|
if source_info.endian = target_info.endian then
|
|
begin
|
|
for l:=0 to p.resulttype.def.size-1 do
|
|
asmlist[cural].concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[l]));
|
|
end
|
|
else
|
|
begin
|
|
{ store as longint values in swaped format }
|
|
j:=0;
|
|
for l:=0 to ((p.resulttype.def.size-1) div 4) do
|
|
begin
|
|
asmlist[cural].concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+3]));
|
|
asmlist[cural].concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+2]));
|
|
asmlist[cural].concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j+1]));
|
|
asmlist[cural].concat(tai_const.create_8bit(Psetbytes(tsetconstnode(p).value_set)^[j]));
|
|
Inc(j,4);
|
|
end;
|
|
end;
|
|
end;
|
|
end
|
|
else
|
|
Message(parser_e_illegal_expression);
|
|
p.free;
|
|
end;
|
|
enumdef:
|
|
begin
|
|
p:=comp_expr(true);
|
|
if p.nodetype=ordconstn then
|
|
begin
|
|
if equal_defs(p.resulttype.def,t.def) or
|
|
is_subequal(p.resulttype.def,t.def) then
|
|
begin
|
|
case longint(p.resulttype.def.size) of
|
|
1 : asmlist[cural].concat(Tai_const.Create_8bit(Byte(tordconstnode(p).value)));
|
|
2 : asmlist[cural].concat(Tai_const.Create_16bit(Word(tordconstnode(p).value)));
|
|
4 : asmlist[cural].concat(Tai_const.Create_32bit(Longint(tordconstnode(p).value)));
|
|
end;
|
|
end
|
|
else
|
|
IncompatibleTypes(p.resulttype.def,t.def);
|
|
end
|
|
else
|
|
Message(parser_e_illegal_expression);
|
|
p.free;
|
|
end;
|
|
stringdef:
|
|
begin
|
|
p:=comp_expr(true);
|
|
{ load strval and strlength of the constant tree }
|
|
if (p.nodetype=stringconstn) or is_widestring(t.def) 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(parser_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;
|
|
asmlist[cural].concat(Tai_const.Create_8bit(strlength));
|
|
{ this can also handle longer strings }
|
|
getmem(ca,strlength+1);
|
|
move(strval^,ca^,strlength);
|
|
ca[strlength]:=#0;
|
|
asmlist[cural].concat(Tai_string.Create_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 }
|
|
asmlist[cural].concat(Tai_string.Create_pchar(ca,t.def.size-strlength-1));
|
|
end;
|
|
end;
|
|
st_ansistring:
|
|
begin
|
|
{ an empty ansi string is nil! }
|
|
if (strlength=0) then
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil))
|
|
else
|
|
begin
|
|
objectlibrary.getdatalabel(ll);
|
|
asmlist[cural].concat(Tai_const.Create_sym(ll));
|
|
asmlist[al_const].concat(tai_align.create(const_align(sizeof(aint))));
|
|
asmlist[al_const].concat(Tai_const.Create_aint(-1));
|
|
asmlist[al_const].concat(Tai_const.Create_aint(strlength));
|
|
asmlist[al_const].concat(Tai_label.Create(ll));
|
|
getmem(ca,strlength+1);
|
|
move(strval^,ca^,strlength);
|
|
{ The terminating #0 to be stored in the .data section (JM) }
|
|
ca[strlength]:=#0;
|
|
asmlist[al_const].concat(Tai_string.Create_pchar(ca,strlength));
|
|
end;
|
|
end;
|
|
st_widestring:
|
|
begin
|
|
{ an empty ansi string is nil! }
|
|
if (strlength=0) then
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil))
|
|
else
|
|
begin
|
|
objectlibrary.getdatalabel(ll);
|
|
asmlist[cural].concat(Tai_const.Create_sym(ll));
|
|
asmlist[al_const].concat(tai_align.create(const_align(sizeof(aint))));
|
|
asmlist[al_const].concat(Tai_const.Create_aint(-1));
|
|
asmlist[al_const].concat(Tai_const.Create_aint(strlength));
|
|
asmlist[al_const].concat(Tai_label.Create(ll));
|
|
for i:=0 to strlength-1 do
|
|
asmlist[al_const].concat(Tai_const.Create_16bit(pcompilerwidestring(strval)^.data[i]));
|
|
{ ending #0 }
|
|
asmlist[al_const].concat(Tai_const.Create_16bit(0))
|
|
end;
|
|
end;
|
|
st_longstring:
|
|
begin
|
|
internalerror(200107081);
|
|
end;
|
|
end;
|
|
end;
|
|
p.free;
|
|
end;
|
|
arraydef:
|
|
begin
|
|
{ dynamic array nil }
|
|
if is_dynamic_array(t.def) then
|
|
begin
|
|
{ Only allow nil initialization }
|
|
consume(_NIL);
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil));
|
|
end
|
|
else
|
|
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(parser_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
|
|
asmlist[cural].concat(Tai_const.Create_8bit(byte(ca^)));
|
|
inc(ca);
|
|
end
|
|
else
|
|
{Fill the remaining positions with #0.}
|
|
asmlist[cural].concat(Tai_const.Create_8bit(0));
|
|
end;
|
|
p.free;
|
|
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
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil));
|
|
if (po_methodpointer in tprocvardef(t.def).procoptions) then
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil));
|
|
consume(_NIL);
|
|
goto myexit;
|
|
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;
|
|
goto myexit;
|
|
end;
|
|
{ let type conversion check everything needed }
|
|
inserttypeconv(p,t);
|
|
if codegenerror then
|
|
begin
|
|
p.free;
|
|
goto myexit;
|
|
end;
|
|
{ remove typeconvs, that will normally insert a lea
|
|
instruction which is not necessary for us }
|
|
while p.nodetype=typeconvn do
|
|
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
|
|
asmlist[cural].concat(Tai_const.createname(
|
|
tprocsym(tloadnode(p).symtableentry).first_procdef.mangledname,AT_FUNCTION,0));
|
|
end
|
|
else
|
|
Message(parser_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
|
|
asmlist[cural].concat(Tai_const.Create_32bit(longint(tmpguid.D1)));
|
|
asmlist[cural].concat(Tai_const.Create_16bit(tmpguid.D2));
|
|
asmlist[cural].concat(Tai_const.Create_16bit(tmpguid.D3));
|
|
for i:=Low(tmpguid.D4) to High(tmpguid.D4) do
|
|
asmlist[cural].concat(Tai_const.Create_8bit(tmpguid.D4[i]));
|
|
end
|
|
else
|
|
Message(parser_e_improper_guid_syntax);
|
|
end
|
|
else
|
|
begin
|
|
p.free;
|
|
Message(parser_e_illegal_expression);
|
|
goto myexit;
|
|
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
|
|
(tfieldvarsym(recsym).fieldoffset = tfieldvarsym(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); }
|
|
(tfieldvarsym(recsym).fieldoffset = aktpos) then
|
|
srsym := recsym
|
|
{ going backwards isn't allowed in any mode }
|
|
else if (tfieldvarsym(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 tfieldvarsym(srsym).fieldoffset>aktpos then
|
|
for i:=1 to tfieldvarsym(srsym).fieldoffset-aktpos do
|
|
asmlist[cural].concat(Tai_const.Create_8bit(0));
|
|
|
|
{ new position }
|
|
aktpos:=tfieldvarsym(srsym).fieldoffset+tfieldvarsym(srsym).vartype.def.size;
|
|
|
|
{ read the data }
|
|
readtypedconst(tfieldvarsym(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
|
|
(tfieldvarsym(srsym).fieldoffset > tfieldvarsym(recsym).fieldoffset)) then
|
|
Message1(parser_w_skipped_fields_after,sorg);
|
|
|
|
for i:=1 to t.def.size-aktpos do
|
|
asmlist[cural].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
|
|
asmlist[cural].concat(Tai_const.Create_sym(nil));
|
|
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
|
|
with tfieldvarsym(srsym) do
|
|
begin
|
|
{ check position }
|
|
if fieldoffset<aktpos then
|
|
message(parser_e_invalid_record_const);
|
|
|
|
{ check in VMT needs to be added for TP mode }
|
|
with Tobjectdef(t.def) do
|
|
if not(m_fpc in aktmodeswitches) and
|
|
(oo_has_vmt in objectoptions) and
|
|
(vmt_offset<fieldoffset) then
|
|
begin
|
|
for i:=1 to vmt_offset-aktpos do
|
|
asmlist[cural].concat(tai_const.create_8bit(0));
|
|
asmlist[cural].concat(tai_const.createname(vmt_mangledname,AT_DATA,0));
|
|
{ this is more general }
|
|
aktpos:=vmt_offset + sizeof(aint);
|
|
end;
|
|
|
|
{ if needed fill }
|
|
if fieldoffset>aktpos then
|
|
for i:=1 to fieldoffset-aktpos do
|
|
asmlist[cural].concat(Tai_const.Create_8bit(0));
|
|
|
|
{ new position }
|
|
aktpos:=fieldoffset+vartype.def.size;
|
|
|
|
{ read the data }
|
|
readtypedconst(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
|
|
asmlist[cural].concat(tai_const.create_8bit(0));
|
|
asmlist[cural].concat(tai_const.createname(tobjectdef(t.def).vmt_mangledname,AT_DATA,0));
|
|
{ this is more general }
|
|
aktpos:=tobjectdef(t.def).vmt_offset + sizeof(aint);
|
|
end;
|
|
for i:=1 to t.def.size-aktpos do
|
|
asmlist[cural].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;
|
|
myexit:
|
|
block_type:=old_block_type;
|
|
end;
|
|
{$ifdef fpc}
|
|
{$maxfpuregisters default}
|
|
{$endif fpc}
|
|
|
|
end.
|