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|
{
Copyright (c) 1998-2002 by Florian Klaempfl
Generates nodes for routines that need compiler support
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit pinline;
{$i fpcdefs.inc}
interface
uses
symtype,
node,
globals,
cpuinfo;
function new_dispose_statement(is_new:boolean) : tnode;
function new_function : tnode;
function inline_setlength : tnode;
function inline_setstring : tnode;
function inline_initialize : tnode;
function inline_finalize : tnode;
function inline_copy : tnode;
implementation
uses
{ common }
cutils,
{ global }
globtype,tokens,verbose,constexp,
systems,
{ symtable }
symbase,symconst,symdef,symsym,symtable,defutil,
{ pass 1 }
pass_1,htypechk,
nmat,nadd,ncal,nmem,nset,ncnv,ninl,ncon,nld,nflw,nbas,nutils,ngenutil,
{ parser }
scanner,
pbase,pexpr,
{ codegen }
cgbase
;
function new_dispose_statement(is_new:boolean) : tnode;
var
newstatement : tstatementnode;
temp : ttempcreatenode;
para : tcallparanode;
p,p2 : tnode;
again : boolean; { dummy for do_proc_call }
destructorname : TIDString;
sym : tsym;
classh : tobjectdef;
callflag : tcallnodeflag;
destructorpos,
storepos : tfileposinfo;
variantdesc : pvariantrecdesc;
found : boolean;
j,i : longint;
variantselectsymbol : tfieldvarsym;
begin
if target_info.system in systems_managed_vm then
message(parser_e_feature_unsupported_for_vm);
consume(_LKLAMMER);
p:=comp_expr(true,false);
{ calc return type }
if is_new then
begin
set_varstate(p,vs_written,[]);
valid_for_var(p,true);
end
else
set_varstate(p,vs_readwritten,[vsf_must_be_valid]);
if (m_mac in current_settings.modeswitches) and
is_class(p.resultdef) then
begin
classh:=tobjectdef(p.resultdef);
{ make sure we call ObjPas.TObject.Create/Free and not a random }
{ create/free method in a macpas descendent object (since those }
{ are not supposed to be called automatically when you call }
{ new/dispose) }
while assigned(classh.childof) do
classh := classh.childof;
if is_new then
begin
sym:=search_struct_member(classh,'CREATE');
p2 := cloadvmtaddrnode.create(ctypenode.create(p.resultdef));
end
else
begin
sym:=search_struct_member(classh,'FREE');
p2 := p;
end;
if not(assigned(sym)) then
begin
p.free;
if is_new then
p2.free;
new_dispose_statement := cerrornode.create;
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
exit;
end;
do_member_read(classh,false,sym,p2,again,[]);
{ we need the real called method }
do_typecheckpass(p2);
if (p2.nodetype=calln) and
assigned(tcallnode(p2).procdefinition) then
begin
if is_new then
begin
if (tcallnode(p2).procdefinition.proctypeoption<>potype_constructor) then
Message(parser_e_expr_have_to_be_constructor_call);
p2.resultdef:=p.resultdef;
p2:=cassignmentnode.create(p,p2);
typecheckpass(p2);
end
else
begin
{ Free is not a destructor
if (tcallnode(p2).procdefinition.proctypeoption<>potype_destructor) then
Message(parser_e_expr_have_to_be_destructor_call);
}
end
end
else
internalerror(2005061202);
new_dispose_statement := p2;
end
{ constructor,destructor specified }
else if (([m_mac,m_iso]*current_settings.modeswitches)=[]) and
try_to_consume(_COMMA) then
begin
{ extended syntax of new and dispose }
{ function styled new is handled in factor }
{ destructors have no parameters }
destructorname:=pattern;
destructorpos:=current_tokenpos;
consume(_ID);
if is_typeparam(p.resultdef) then
begin
p.free;
p:=factor(false,false);
p.free;
consume(_RKLAMMER);
new_dispose_statement:=cnothingnode.create;
exit;
end;
if (p.resultdef.typ<>pointerdef) then
begin
Message1(type_e_pointer_type_expected,p.resultdef.typename);
p.free;
p:=factor(false,false);
p.free;
consume(_RKLAMMER);
new_dispose_statement:=cerrornode.create;
exit;
end;
{ first parameter must be an object or class }
if tpointerdef(p.resultdef).pointeddef.typ<>objectdef then
begin
Message(parser_e_pointer_to_class_expected);
p.free;
new_dispose_statement:=factor(false,false);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
exit;
end;
{ check, if the first parameter is a pointer to a _class_ }
classh:=tobjectdef(tpointerdef(p.resultdef).pointeddef);
if is_class(classh) then
begin
Message(parser_e_no_new_or_dispose_for_classes);
new_dispose_statement:=factor(false,false);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
exit;
end;
{ search cons-/destructor, also in parent classes }
storepos:=current_tokenpos;
current_tokenpos:=destructorpos;
sym:=search_struct_member(classh,destructorname);
current_tokenpos:=storepos;
{ the second parameter of new/dispose must be a call }
{ to a cons-/destructor }
if (not assigned(sym)) or (sym.typ<>procsym) then
begin
if is_new then
Message(parser_e_expr_have_to_be_constructor_call)
else
Message(parser_e_expr_have_to_be_destructor_call);
p.free;
new_dispose_statement:=cerrornode.create;
end
else
begin
{ For new(var,constructor) we need to take a copy because
p is also used in the assignmentn below }
if is_new then
begin
p2:=cderefnode.create(p.getcopy);
include(p2.flags,nf_no_checkpointer);
end
else
p2:=cderefnode.create(p);
do_typecheckpass(p2);
if is_new then
callflag:=cnf_new_call
else
callflag:=cnf_dispose_call;
if is_new then
do_member_read(classh,false,sym,p2,again,[callflag])
else
begin
if not(m_fpc in current_settings.modeswitches) then
do_member_read(classh,false,sym,p2,again,[callflag])
else
begin
p2:=ccallnode.create(nil,tprocsym(sym),sym.owner,p2,[callflag]);
{ support dispose(p,done()); }
if try_to_consume(_LKLAMMER) then
begin
if not try_to_consume(_RKLAMMER) then
begin
Message(parser_e_no_paras_for_destructor);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
end;
end;
end;
end;
{ we need the real called method }
do_typecheckpass(p2);
if (p2.nodetype=calln) and
assigned(tcallnode(p2).procdefinition) then
begin
if is_new then
begin
if (tcallnode(p2).procdefinition.proctypeoption<>potype_constructor) then
Message(parser_e_expr_have_to_be_constructor_call);
p2.resultdef:=p.resultdef;
p2:=cassignmentnode.create(p,p2);
end
else
begin
if (tcallnode(p2).procdefinition.proctypeoption<>potype_destructor) then
Message(parser_e_expr_have_to_be_destructor_call);
end;
end
else
begin
if is_new then
CGMessage(parser_e_expr_have_to_be_constructor_call)
else
CGMessage(parser_e_expr_have_to_be_destructor_call);
end;
result:=p2;
end;
end
else
begin
if (p.resultdef.typ<>pointerdef) then
Begin
if is_typeparam(p.resultdef) then
begin
p.free;
consume(_RKLAMMER);
new_dispose_statement:=cnothingnode.create;
exit;
end
else
begin
Message1(type_e_pointer_type_expected,p.resultdef.typename);
new_dispose_statement:=cerrornode.create;
end;
end
else
begin
if (tpointerdef(p.resultdef).pointeddef.typ=objectdef) and
(oo_has_vmt in tobjectdef(tpointerdef(p.resultdef).pointeddef).objectoptions) then
Message(parser_w_use_extended_syntax_for_objects);
if (tpointerdef(p.resultdef).pointeddef.typ=orddef) and
(torddef(tpointerdef(p.resultdef).pointeddef).ordtype=uvoid) then
begin
if (m_tp7 in current_settings.modeswitches) or
(m_delphi in current_settings.modeswitches) then
Message(parser_w_no_new_dispose_on_void_pointers)
else
Message(parser_e_no_new_dispose_on_void_pointers);
end;
{ create statements with call to getmem+initialize or
finalize+freemem }
new_dispose_statement:=internalstatements(newstatement);
if is_new then
begin
{ create temp for result }
temp := ctempcreatenode.create(p.resultdef,p.resultdef.size,tt_persistent,true);
addstatement(newstatement,temp);
{ create call to fpc_getmem }
para := ccallparanode.create(cordconstnode.create
(tpointerdef(p.resultdef).pointeddef.size,s32inttype,true),nil);
addstatement(newstatement,cassignmentnode.create(
ctemprefnode.create(temp),
ccallnode.createintern('fpc_getmem',para)));
{ create call to fpc_initialize }
if is_managed_type(tpointerdef(p.resultdef).pointeddef) or
((m_iso in current_settings.modeswitches) and (tpointerdef(p.resultdef).pointeddef.typ=filedef)) then
addstatement(newstatement,cnodeutils.initialize_data_node(cderefnode.create(ctemprefnode.create(temp)),false));
{ copy the temp to the destination }
addstatement(newstatement,cassignmentnode.create(
p,
ctemprefnode.create(temp)));
if (m_iso in current_settings.modeswitches) and (is_record(tpointerdef(p.resultdef).pointeddef)) then
begin
variantdesc:=trecorddef(tpointerdef(p.resultdef).pointeddef).variantrecdesc;
while (token=_COMMA) and assigned(variantdesc) do
begin
consume(_COMMA);
p2:=factor(false,false);
do_typecheckpass(p2);
if p2.nodetype=ordconstn then
begin
found:=false;
{ we do not have dynamic dfa, so avoid warning on variantselectsymbol below }
variantselectsymbol:=nil;
for i:=0 to high(variantdesc^.branches) do
begin
for j:=0 to high(variantdesc^.branches[i].values) do
if variantdesc^.branches[i].values[j]=tordconstnode(p2).value then
begin
found:=true;
variantselectsymbol:=tfieldvarsym(variantdesc^.variantselector);
variantdesc:=variantdesc^.branches[i].nestedvariant;
break;
end;
if found then
break;
end;
if found then
begin
{ if no tag-field is given, do not create an assignment statement for it }
if assigned(variantselectsymbol) then
{ setup variant selector }
addstatement(newstatement,cassignmentnode.create(
csubscriptnode.create(variantselectsymbol,
cderefnode.create(ctemprefnode.create(temp))),
p2));
end
else
Message(parser_e_illegal_expression);
end
else
Message(parser_e_illegal_expression);
end;
end;
{ release temp }
addstatement(newstatement,ctempdeletenode.create(temp));
end
else
begin
{ create call to fpc_finalize }
if is_managed_type(tpointerdef(p.resultdef).pointeddef) then
addstatement(newstatement,cnodeutils.finalize_data_node(cderefnode.create(p.getcopy)));
{ create call to fpc_freemem }
para := ccallparanode.create(p,nil);
addstatement(newstatement,ccallnode.createintern('fpc_freemem',para));
end;
end;
end;
consume(_RKLAMMER);
end;
function new_function : tnode;
var
newstatement : tstatementnode;
newblock : tblocknode;
temp : ttempcreatenode;
para : tcallparanode;
p1,p2 : tnode;
classh : tobjectdef;
srsym : tsym;
srsymtable : TSymtable;
again : boolean; { dummy for do_proc_call }
begin
if target_info.system in systems_managed_vm then
message(parser_e_feature_unsupported_for_vm);
consume(_LKLAMMER);
p1:=factor(false,false);
if p1.nodetype<>typen then
begin
Message(type_e_type_id_expected);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
p1.destroy;
new_function:=cerrornode.create;
exit;
end;
if (p1.resultdef.typ<>pointerdef) then
begin
Message1(type_e_pointer_type_expected,p1.resultdef.typename);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
p1.destroy;
new_function:=cerrornode.create;
exit;
end;
if try_to_consume(_RKLAMMER) then
begin
if (tpointerdef(p1.resultdef).pointeddef.typ=objectdef) and
(oo_has_vmt in tobjectdef(tpointerdef(p1.resultdef).pointeddef).objectoptions) then
Message(parser_w_use_extended_syntax_for_objects);
if p1.nodetype=typen then
ttypenode(p1).allowed:=true;
p1:=cinlinenode.create(in_new_x,false,p1);
end
else
begin
consume(_COMMA);
if tpointerdef(p1.resultdef).pointeddef.typ<>objectdef then
begin
Message(parser_e_pointer_to_class_expected);
consume_all_until(_RKLAMMER);
consume(_RKLAMMER);
p1.destroy;
new_function:=cerrornode.create;
exit;
end;
classh:=tobjectdef(tpointerdef(p1.resultdef).pointeddef);
{ use the objectdef for loading the VMT }
p2:=p1;
p1:=ctypenode.create(tpointerdef(p1.resultdef).pointeddef);
do_typecheckpass(p1);
{ search the constructor also in the symbol tables of
the parents }
afterassignment:=false;
searchsym_in_class(classh,classh,pattern,srsym,srsymtable,[ssf_search_helper]);
consume(_ID);
do_member_read(classh,false,srsym,p1,again,[cnf_new_call]);
{ we need to know which procedure is called }
do_typecheckpass(p1);
if not(
(p1.nodetype=calln) and
assigned(tcallnode(p1).procdefinition) and
(tcallnode(p1).procdefinition.proctypeoption=potype_constructor)
) then
Message(parser_e_expr_have_to_be_constructor_call);
{ constructors return boolean, update resultdef to return
the pointer to the object }
p1.resultdef:=p2.resultdef;
p2.free;
consume(_RKLAMMER);
end;
new_function:=p1;
end;
function inline_setlength : tnode;
var
paras: tnode;
begin
consume(_LKLAMMER);
paras:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
if not assigned(paras) then
begin
result:=cerrornode.create;
CGMessage1(parser_e_wrong_parameter_size,'SetLength');
exit;
end;
result:=cinlinenode.create(in_setlength_x,false,paras);
end;
function inline_setstring : tnode;
var
paras, strpara, pcharpara: tnode;
procname: string;
begin
consume(_LKLAMMER);
paras:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
procname:='';
if assigned(paras) and
assigned(tcallparanode(paras).right) and
assigned(tcallparanode(tcallparanode(paras).right).right) then
begin
do_typecheckpass(tcallparanode(tcallparanode(paras).right).left);
do_typecheckpass(tcallparanode(tcallparanode(tcallparanode(paras).right).right).left);
pcharpara:=tcallparanode(tcallparanode(paras).right).left;
strpara:=tcallparanode(tcallparanode(tcallparanode(paras).right).right).left;
if strpara.resultdef.typ=stringdef then
begin
{ if there are three parameters and the first parameter
( = paras.right.right) is an ansistring, add a codepage
parameter }
if is_ansistring(strpara.resultdef) then
paras:=ccallparanode.create(genintconstnode(tstringdef(strpara.resultdef).encoding),paras);
procname:='fpc_setstring_'+tstringdef(strpara.resultdef).stringtypname;
{ decide which version to call based on the second parameter }
if not is_shortstring(strpara.resultdef) then
if is_pwidechar(pcharpara.resultdef) or
is_widechar(pcharpara.resultdef) or
((pcharpara.resultdef.typ=arraydef) and
is_widechar(tarraydef(pcharpara.resultdef).elementdef)) then
procname:=procname+'_pwidechar'
else
procname:=procname+'_pansichar';
end;
end;
{ default version (for error message) in case of missing or wrong
parameters }
if procname='' then
if m_default_unicodestring in current_settings.modeswitches then
procname:='fpc_setstring_unicodestr_pwidechar'
else if m_default_ansistring in current_settings.modeswitches then
procname:='fpc_setstring_ansistr_pansichar'
else
procname:='fpc_setstring_shortstr';
result:=ccallnode.createintern(procname,paras)
end;
function inline_initfinal(isinit: boolean): tnode;
var
newblock,
paras : tnode;
npara,
destppn,
ppn : tcallparanode;
begin
{ for easy exiting if something goes wrong }
result := cerrornode.create;
consume(_LKLAMMER);
paras:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
ppn:=tcallparanode(paras);
if not assigned(paras) or
(assigned(ppn.right) and
assigned(tcallparanode(ppn.right).right)) then
begin
if isinit then
CGMessage1(parser_e_wrong_parameter_size,'Initialize')
else
CGMessage1(parser_e_wrong_parameter_size,'Finalize');
exit;
end;
{ 2 arguments? }
if assigned(ppn.right) then
begin
destppn:=tcallparanode(ppn.right);
{ create call to fpc_initialize/finalize_array }
npara:=ccallparanode.create(ctypeconvnode.create
(ppn.left,s32inttype),
ccallparanode.create(caddrnode.create_internal
(crttinode.create(tstoreddef(destppn.left.resultdef),initrtti,rdt_normal)),
ccallparanode.create(caddrnode.create_internal
(destppn.left),nil)));
if isinit then
newblock:=ccallnode.createintern('fpc_initialize_array',npara)
else
newblock:=ccallnode.createintern('fpc_finalize_array',npara);
destppn.left:=nil;
end
else
begin
if isinit then
newblock:=cnodeutils.initialize_data_node(ppn.left,true)
else
newblock:=cnodeutils.finalize_data_node(ppn.left);
end;
ppn.left:=nil;
paras.free;
result.free;
result:=newblock;
end;
function inline_initialize : tnode;
begin
result:=inline_initfinal(true);
end;
function inline_finalize : tnode;
begin
result:=inline_initfinal(false);
end;
function inline_copy : tnode;
var
paras : tnode;
{ for easy exiting if something goes wrong }
begin
result := cerrornode.create;
consume(_LKLAMMER);
paras:=parse_paras(false,false,_RKLAMMER);
consume(_RKLAMMER);
if not assigned(paras) then
begin
CGMessage1(parser_e_wrong_parameter_size,'Copy');
exit;
end;
result.free;
result:=cinlinenode.create(in_copy_x,false,paras);
end;
end.
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