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fpc/compiler/types.pas
peter c8f444b65f * ag386bin updates 
+ coff writer
1999-02-25 21:02:16 +00:00

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{
$Id$
Copyright (C) 1993-98 by Florian Klaempfl
This unit provides some help routines for type handling
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 types;
interface
uses
cobjects,globals,symtable,aasm;
type
tmmxtype = (mmxno,mmxu8bit,mmxs8bit,mmxu16bit,mmxs16bit,
mmxu32bit,mmxs32bit,mmxfixed16,mmxsingle);
{ returns true, if def defines an ordinal type }
function is_ordinal(def : pdef) : boolean;
{ returns the min. value of the type }
function get_min_value(def : pdef) : longint;
{ returns true, if def defines an ordinal type }
function is_integer(def : pdef) : boolean;
{ true if p is a boolean }
function is_boolean(def : pdef) : boolean;
{ true if p is a char }
function is_char(def : pdef) : boolean;
{ true if p points to an open string def }
function is_open_string(p : pdef) : boolean;
{ true if p points to an open array def }
function is_open_array(p : pdef) : boolean;
{ true, if p points to an array of const def }
function is_array_constructor(p : pdef) : boolean;
{ true if p is an ansi string def }
function is_ansistring(p : pdef) : boolean;
{ true if p is a long string def }
function is_longstring(p : pdef) : boolean;
{ true if p is a wide string def }
function is_widestring(p : pdef) : boolean;
{ true if p is a short string def }
function is_shortstring(p : pdef) : boolean;
{ true if p is a char array def }
function is_chararray(p : pdef) : boolean;
{ true if p is a pchar def }
function is_pchar(p : pdef) : boolean;
{ true if p is a smallset def }
function is_smallset(p : pdef) : boolean;
{ returns true, if def defines a signed data type (only for ordinal types) }
function is_signed(def : pdef) : boolean;
{ returns true, if def uses FPU }
function is_fpu(def : pdef) : boolean;
{ true if the return value is in EAX }
function ret_in_acc(def : pdef) : boolean;
{ true if uses a parameter as return value }
function ret_in_param(def : pdef) : boolean;
{ true, if def is a 64 bit int type }
function is_64bitint(def : pdef) : boolean;
function push_high_param(def : pdef) : boolean;
{ true if a parameter is too large to copy and only the address is pushed }
function push_addr_param(def : pdef) : boolean;
{ true if we must never copy this parameter }
const
never_copy_const_param : boolean = false;
{ true, if def1 and def2 are semantical the same }
function is_equal(def1,def2 : pdef) : boolean;
{ checks for type compatibility (subgroups of type) }
{ used for case statements... probably missing stuff }
{ to use on other types }
function is_subequal(def1, def2: pdef): boolean;
{ true, if two parameter lists are equal }
{ if value_equal_const is true, call by value }
{ and call by const parameter are assumed as }
{ equal }
function equal_paras(def1,def2 : pdefcoll;value_equal_const : boolean) : boolean;
{ true if a function can be assigned to a procvar }
function proc_to_procvar_equal(def1,def2 : pabstractprocdef) : boolean;
{ if l isn't in the range of def a range check error is generated }
procedure testrange(def : pdef;l : longint);
{ returns the range of def }
procedure getrange(def : pdef;var l : longint;var h : longint);
{ generates a VMT for _class }
procedure genvmt(_class : pobjectdef);
{ generates the message tables for a class }
function genstrmsgtab(_class : pobjectdef) : plabel;
function genintmsgtab(_class : pobjectdef) : plabel;
{ some type helper routines for MMX support }
function is_mmx_able_array(p : pdef) : boolean;
{ returns the mmx type }
function mmx_type(p : pdef) : tmmxtype;
implementation
uses
strings,globtype,verbose;
function equal_paras(def1,def2 : pdefcoll;value_equal_const : boolean) : boolean;
begin
while (assigned(def1)) and (assigned(def2)) do
begin
if value_equal_const then
begin
if not(is_equal(def1^.data,def2^.data)) or
((def1^.paratyp<>def2^.paratyp) and
((def1^.paratyp=vs_var) or
(def1^.paratyp=vs_var)
)
) then
begin
equal_paras:=false;
exit;
end;
end
else
begin
if not(is_equal(def1^.data,def2^.data)) or
(def1^.paratyp<>def2^.paratyp) then
begin
equal_paras:=false;
exit;
end;
end;
def1:=def1^.next;
def2:=def2^.next;
end;
if (def1=nil) and (def2=nil) then
equal_paras:=true
else
equal_paras:=false;
end;
{ true if a function can be assigned to a procvar }
function proc_to_procvar_equal(def1,def2 : pabstractprocdef) : boolean;
begin
if is_equal(def1^.retdef,def2^.retdef) and
equal_paras(def1^.para1,def2^.para1,false) and
((def1^.options and po_compatibility_options)=
(def2^.options and po_compatibility_options)) then
proc_to_procvar_equal:=true
else
proc_to_procvar_equal:=false;
end;
{ returns true, if def uses FPU }
function is_fpu(def : pdef) : boolean;
begin
is_fpu:=(def^.deftype=floatdef) and (pfloatdef(def)^.typ<>f32bit);
end;
{ true if p is an ordinal }
function is_ordinal(def : pdef) : boolean;
var
dt : tbasetype;
begin
case def^.deftype of
orddef : begin
dt:=porddef(def)^.typ;
is_ordinal:=dt in [uchar,u8bit,u16bit,u32bit,u64bit,s8bit,s16bit,s32bit,
s64bitint,bool8bit,bool16bit,bool32bit];
end;
enumdef : is_ordinal:=true;
else
is_ordinal:=false;
end;
end;
{ returns the min. value of the type }
function get_min_value(def : pdef) : longint;
begin
case def^.deftype of
orddef:
get_min_value:=porddef(def)^.low;
enumdef:
get_min_value:=penumdef(def)^.min;
else
get_min_value:=0;
end;
end;
{ true if p is an integer }
function is_integer(def : pdef) : boolean;
begin
is_integer:=(def^.deftype=orddef) and
(porddef(def)^.typ in [uauto,u8bit,u16bit,u32bit,s8bit,s16bit,s32bit]);
end;
{ true if p is a boolean }
function is_boolean(def : pdef) : boolean;
begin
is_boolean:=(def^.deftype=orddef) and
(porddef(def)^.typ in [bool8bit,bool16bit,bool32bit]);
end;
{ true if p is a char }
function is_char(def : pdef) : boolean;
begin
is_char:=(def^.deftype=orddef) and
(porddef(def)^.typ=uchar);
end;
{ true if p is signed (integer) }
function is_signed(def : pdef) : boolean;
var
dt : tbasetype;
begin
case def^.deftype of
orddef : begin
dt:=porddef(def)^.typ;
is_signed:=(dt in [s8bit,s16bit,s32bit]);
end;
enumdef : is_signed:=false;
else
is_signed:=false;
end;
end;
{ true, if p points to an open array def }
function is_open_string(p : pdef) : boolean;
begin
is_open_string:=(p^.deftype=stringdef) and
(pstringdef(p)^.string_typ=st_shortstring) and
(pstringdef(p)^.len=0);
end;
{ true, if p points to an open array def }
function is_open_array(p : pdef) : boolean;
begin
is_open_array:=(p^.deftype=arraydef) and
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=-1);
end;
{ true, if p points to an array of const def }
function is_array_constructor(p : pdef) : boolean;
begin
is_array_constructor:=(p^.deftype=arraydef) and
(parraydef(p)^.IsConstructor);
end;
{ true if p is an ansi string def }
function is_ansistring(p : pdef) : boolean;
begin
is_ansistring:=(p^.deftype=stringdef) and
(pstringdef(p)^.string_typ=st_ansistring);
end;
{ true if p is an long string def }
function is_longstring(p : pdef) : boolean;
begin
is_longstring:=(p^.deftype=stringdef) and
(pstringdef(p)^.string_typ=st_longstring);
end;
{ true if p is an wide string def }
function is_widestring(p : pdef) : boolean;
begin
is_widestring:=(p^.deftype=stringdef) and
(pstringdef(p)^.string_typ=st_widestring);
end;
{ true if p is an short string def }
function is_shortstring(p : pdef) : boolean;
begin
is_shortstring:=(p^.deftype=stringdef) and
(pstringdef(p)^.string_typ=st_shortstring);
end;
{ true if p is a char array def }
function is_chararray(p : pdef) : boolean;
begin
is_chararray:=(p^.deftype=arraydef) and
(parraydef(p)^.lowrange=0) and
is_equal(parraydef(p)^.definition,cchardef);
end;
{ true if p is a pchar def }
function is_pchar(p : pdef) : boolean;
begin
is_pchar:=(p^.deftype=pointerdef) and
is_equal(Ppointerdef(p)^.definition,cchardef);
end;
{ true if p is a smallset def }
function is_smallset(p : pdef) : boolean;
begin
is_smallset:=(p^.deftype=setdef) and
(psetdef(p)^.settype=smallset);
end;
{ true if the return value is in accumulator (EAX for i386), D0 for 68k }
function ret_in_acc(def : pdef) : boolean;
begin
ret_in_acc:=(def^.deftype in [orddef,pointerdef,enumdef,classrefdef]) or
((def^.deftype=stringdef) and (pstringdef(def)^.string_typ in [st_ansistring,st_widestring])) or
((def^.deftype=procvardef) and ((pprocvardef(def)^.options and pomethodpointer)=0)) or
((def^.deftype=objectdef) and pobjectdef(def)^.isclass) or
((def^.deftype=setdef) and (psetdef(def)^.settype=smallset)) or
((def^.deftype=floatdef) and (pfloatdef(def)^.typ=f32bit));
end;
{ true, if def is a 64 bit int type }
function is_64bitint(def : pdef) : boolean;
begin
is_64bitint:=(def^.deftype=orddef) and (porddef(def)^.typ in [u64bit,s64bitint])
end;
{ true if uses a parameter as return value }
function ret_in_param(def : pdef) : boolean;
begin
ret_in_param:=(def^.deftype in [arraydef,recorddef]) or
((def^.deftype=stringdef) and (pstringdef(def)^.string_typ in [st_shortstring,st_longstring])) or
((def^.deftype=procvardef) and ((pprocvardef(def)^.options and pomethodpointer)<>0)) or
((def^.deftype=objectdef) and not(pobjectdef(def)^.isclass)) or
((def^.deftype=setdef) and (psetdef(def)^.settype<>smallset));
end;
function push_high_param(def : pdef) : boolean;
begin
push_high_param:=is_open_array(def) or is_open_string(def);
end;
{ true if a parameter is too large to copy and only the address is pushed }
function push_addr_param(def : pdef) : boolean;
begin
push_addr_param:=never_copy_const_param or
(def^.deftype in [arraydef,formaldef,recorddef]) or
((def^.deftype=objectdef) and not(pobjectdef(def)^.isclass)) or
((def^.deftype=stringdef) and (pstringdef(def)^.string_typ in [st_shortstring,st_longstring])) or
((def^.deftype=procvardef) and ((pprocvardef(def)^.options and pomethodpointer)<>0)) or
((def^.deftype=setdef) and (psetdef(def)^.settype<>smallset));
end;
{ test if l is in the range of def, outputs error if out of range }
procedure testrange(def : pdef;l : longint);
var
lv,hv: longint;
begin
getrange(def,lv,hv);
if (def^.deftype=orddef) and
(porddef(def)^.typ=u32bit) then
begin
if lv<=hv then
begin
if (l<lv) or (l>hv) then
begin
if (cs_check_range in aktlocalswitches) then
Message(parser_e_range_check_error)
else
Message(parser_w_range_check_error);
end;
end
else
{ this happens with the wrap around problem }
{ if lv is positive and hv is over $7ffffff }
{ so it seems negative }
begin
if ((l>=0) and (l<lv)) or
((l<0) and (l>hv)) then
begin
if (cs_check_range in aktlocalswitches) then
Message(parser_e_range_check_error)
else
Message(parser_w_range_check_error);
end;
end;
end
else if (l<lv) or (l>hv) then
begin
if (cs_check_range in aktlocalswitches) then
Message(parser_e_range_check_error)
else
Message(parser_w_range_check_error);
end;
end;
{ return the range from def in l and h }
procedure getrange(def : pdef;var l : longint;var h : longint);
begin
case def^.deftype of
orddef : begin
l:=porddef(def)^.low;
h:=porddef(def)^.high;
end;
enumdef : begin
l:=penumdef(def)^.min;
h:=penumdef(def)^.max;
end;
else
internalerror(987);
end;
end;
function mmx_type(p : pdef) : tmmxtype;
begin
mmx_type:=mmxno;
if is_mmx_able_array(p) then
begin
if parraydef(p)^.definition^.deftype=floatdef then
case pfloatdef(parraydef(p)^.definition)^.typ of
s32real:
mmx_type:=mmxsingle;
f16bit:
mmx_type:=mmxfixed16
end
else
case porddef(parraydef(p)^.definition)^.typ of
u8bit:
mmx_type:=mmxu8bit;
s8bit:
mmx_type:=mmxs8bit;
u16bit:
mmx_type:=mmxu16bit;
s16bit:
mmx_type:=mmxs16bit;
u32bit:
mmx_type:=mmxu32bit;
s32bit:
mmx_type:=mmxs32bit;
end;
end;
end;
function is_mmx_able_array(p : pdef) : boolean;
begin
{$ifdef SUPPORT_MMX}
if (cs_mmx_saturation in aktlocalswitches) then
begin
is_mmx_able_array:=(p^.deftype=arraydef) and
(
(
(parraydef(p)^.definition^.deftype=orddef) and
(
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=1) and
(porddef(parraydef(p)^.definition)^.typ in [u32bit,s32bit])
)
or
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=3) and
(porddef(parraydef(p)^.definition)^.typ in [u16bit,s16bit])
)
)
)
or
(
(
(parraydef(p)^.definition^.deftype=floatdef) and
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=3) and
(pfloatdef(parraydef(p)^.definition)^.typ=f16bit)
) or
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=1) and
(pfloatdef(parraydef(p)^.definition)^.typ=s32real)
)
)
)
);
end
else
begin
is_mmx_able_array:=(p^.deftype=arraydef) and
(
(
(parraydef(p)^.definition^.deftype=orddef) and
(
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=1) and
(porddef(parraydef(p)^.definition)^.typ in [u32bit,s32bit])
)
or
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=3) and
(porddef(parraydef(p)^.definition)^.typ in [u16bit,s16bit])
)
or
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=7) and
(porddef(parraydef(p)^.definition)^.typ in [u8bit,s8bit])
)
)
)
or
(
(parraydef(p)^.definition^.deftype=floatdef) and
(
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=3) and
(pfloatdef(parraydef(p)^.definition)^.typ=f32bit)
)
or
(
(parraydef(p)^.lowrange=0) and
(parraydef(p)^.highrange=1) and
(pfloatdef(parraydef(p)^.definition)^.typ=s32real)
)
)
)
);
end;
{$else SUPPORT_MMX}
is_mmx_able_array:=false;
{$endif SUPPORT_MMX}
end;
function is_equal(def1,def2 : pdef) : boolean;
var
b : boolean;
hd : pdef;
hp1,hp2 : pdefcoll;
begin
{ both types must exists }
if not (assigned(def1) and assigned(def2)) then
begin
is_equal:=false;
exit;
end;
{ be sure, that if there is a stringdef, that this is def1 }
if def2^.deftype=stringdef then
begin
hd:=def1;
def1:=def2;
def2:=hd;
end;
b:=false;
{ both point to the same definition ? }
if def1=def2 then
b:=true
else
{ pointer with an equal definition are equal }
if (def1^.deftype=pointerdef) and (def2^.deftype=pointerdef) then
{ here a problem detected in tabsolutesym }
{ the types can be forward type !! }
begin
if assigned(def1^.sym) and ((def1^.sym^.properties and sp_forwarddef)<>0) then
b:=(def1^.sym=def2^.sym)
else
b:=ppointerdef(def1)^.definition=ppointerdef(def2)^.definition;
end
else
{ ordinals are equal only when the ordinal type is equal }
if (def1^.deftype=orddef) and (def2^.deftype=orddef) then
begin
case porddef(def1)^.typ of
u8bit,u16bit,u32bit,
s8bit,s16bit,s32bit:
b:=((porddef(def1)^.typ=porddef(def2)^.typ) and
(porddef(def1)^.low=porddef(def2)^.low) and
(porddef(def1)^.high=porddef(def2)^.high));
uvoid,uchar,
bool8bit,bool16bit,bool32bit:
b:=(porddef(def1)^.typ=porddef(def2)^.typ);
end;
end
else
if (def1^.deftype=floatdef) and (def2^.deftype=floatdef) then
b:=pfloatdef(def1)^.typ=pfloatdef(def2)^.typ
else
{ strings with the same length are equal }
if (def1^.deftype=stringdef) and (def2^.deftype=stringdef) and
(pstringdef(def1)^.string_typ=pstringdef(def2)^.string_typ) then
begin
b:=not(is_shortstring(def1)) or
(pstringdef(def1)^.len=pstringdef(def2)^.len);
end
{ STRING[N] ist equivalent zu ARRAY[0..N] OF CHAR (N<256) }
{
else if ((def1^.deftype=stringdef) and (def2^.deftype=arraydef)) and
(parraydef(def2)^.definition^.deftype=orddef) and
(porddef(parraydef(def1)^.definition)^.typ=uchar) and
(parraydef(def2)^.lowrange=0) and
(parraydef(def2)^.highrange=pstringdef(def1)^.len) then
b:=true }
else
if (def1^.deftype=formaldef) and (def2^.deftype=formaldef) then
b:=true
{ file types with the same file element type are equal }
{ this is a problem for assign !! }
{ changed to allow if one is untyped }
{ all typed files are equal to the special }
{ typed file that has voiddef as elemnt type }
{ but must NOT match for text file !!! }
else
if (def1^.deftype=filedef) and (def2^.deftype=filedef) then
b:=(pfiledef(def1)^.filetype=pfiledef(def2)^.filetype) and
((
((pfiledef(def1)^.typed_as=nil) and
(pfiledef(def2)^.typed_as=nil)) or
(
(pfiledef(def1)^.typed_as<>nil) and
(pfiledef(def2)^.typed_as<>nil) and
is_equal(pfiledef(def1)^.typed_as,pfiledef(def2)^.typed_as)
) or
( (pfiledef(def1)^.typed_as=pdef(voiddef)) or
(pfiledef(def2)^.typed_as=pdef(voiddef))
)))
{ sets with the same element type are equal }
else
if (def1^.deftype=setdef) and (def2^.deftype=setdef) then
begin
if assigned(psetdef(def1)^.setof) and
assigned(psetdef(def2)^.setof) then
b:=(psetdef(def1)^.setof^.deftype=psetdef(def2)^.setof^.deftype)
else
b:=true;
end
else
if (def1^.deftype=procvardef) and (def2^.deftype=procvardef) then
begin
{ poassembler isn't important for compatibility }
{ if a method is assigned to a methodpointer }
{ is checked before }
b:=((pprocvardef(def1)^.options and not(poassembler or pomethodpointer or
povirtualmethod or pooverridingmethod))=
(pprocvardef(def2)^.options and not(poassembler or pomethodpointer or
povirtualmethod or pooverridingmethod))
) and
is_equal(pprocvardef(def1)^.retdef,pprocvardef(def2)^.retdef);
{ now evalute the parameters }
if b then
begin
hp1:=pprocvardef(def1)^.para1;
hp2:=pprocvardef(def1)^.para1;
while assigned(hp1) and assigned(hp2) do
begin
if not(is_equal(hp1^.data,hp2^.data)) or
not(hp1^.paratyp=hp2^.paratyp) then
begin
b:=false;
break;
end;
hp1:=hp1^.next;
hp2:=hp2^.next;
end;
b:=(hp1=nil) and (hp2=nil);
end;
end
else
if (def1^.deftype=arraydef) and (def2^.deftype=arraydef) and
(is_open_array(def1) or is_open_array(def2)) then
begin
if parraydef(def1)^.IsArrayOfConst or parraydef(def2)^.IsArrayOfConst then
b:=true
else
b:=is_equal(parraydef(def1)^.definition,parraydef(def2)^.definition);
end
else
if (def1^.deftype=classrefdef) and (def2^.deftype=classrefdef) then
begin
{ similar to pointerdef: }
if assigned(def1^.sym) and ((def1^.sym^.properties and sp_forwarddef)<>0) then
b:=(def1^.sym=def2^.sym)
else
b:=is_equal(pclassrefdef(def1)^.definition,pclassrefdef(def2)^.definition);
end;
is_equal:=b;
end;
function is_subequal(def1, def2: pdef): boolean;
Begin
if assigned(def1) and assigned(def2) then
Begin
is_subequal := FALSE;
if (def1^.deftype = orddef) and (def2^.deftype = orddef) then
Begin
{ see p.47 of Turbo Pascal 7.01 manual for the separation of types }
{ range checking for case statements is done with testrange }
case porddef(def1)^.typ of
u8bit,u16bit,u32bit,
s8bit,s16bit,s32bit : is_subequal:=(porddef(def2)^.typ in [s32bit,u32bit,u8bit,s8bit,s16bit,u16bit]);
bool8bit,bool16bit,bool32bit : is_subequal:=(porddef(def2)^.typ in [bool8bit,bool16bit,bool32bit]);
uchar : is_subequal:=(porddef(def2)^.typ=uchar);
end;
end
else
Begin
{ I assume that both enumerations are equal when the first }
{ pointers are equal. }
if (def1^.deftype = enumdef) and (def2^.deftype =enumdef) then
Begin
if penumdef(def1)^.first = penumdef(def2)^.first then
is_subequal := TRUE;
end;
end;
end; { endif assigned ... }
end;
type
pprocdeftree = ^tprocdeftree;
tprocdeftree = record
p : pprocdef;
nl : plabel;
l,r : pprocdeftree;
end;
var
root : pprocdeftree;
count : longint;
procedure insertstr(p : pprocdeftree;var at : pprocdeftree);
var
i : longint;
begin
if at=nil then
begin
at:=p;
inc(count);
end
else
begin
i:=strcomp(p^.p^.messageinf.str,at^.p^.messageinf.str);
if i<0 then
insertstr(p,at^.l)
else if i>0 then
insertstr(p,at^.r)
else
Message1(parser_e_duplicate_message_label,strpas(p^.p^.messageinf.str));
end;
end;
procedure disposeprocdeftree(p : pprocdeftree);
begin
if assigned(p^.l) then
disposeprocdeftree(p^.l);
if assigned(p^.r) then
disposeprocdeftree(p^.r);
dispose(p);
end;
procedure insertmsgstr(p : psym);{$ifndef FPC}far;{$endif FPC}
var
hp : pprocdef;
pt : pprocdeftree;
begin
if p^.typ=procsym then
begin
hp:=pprocsym(p)^.definition;
while assigned(hp) do
begin
if (hp^.options and pomsgstr)<>0 then
begin
new(pt);
pt^.p:=hp;
pt^.l:=nil;
pt^.r:=nil;
insertstr(pt,root);
end;
hp:=hp^.nextoverloaded;
end;
end;
end;
procedure writenames(p : pprocdeftree);
begin
getlabel(p^.nl);
if assigned(p^.l) then
writenames(p^.l);
datasegment^.concat(new(pai_label,init(p^.nl)));
datasegment^.concat(new(pai_const,init_8bit(strlen(p^.p^.messageinf.str))));
datasegment^.concat(new(pai_string,init_pchar(p^.p^.messageinf.str)));
if assigned(p^.r) then
writenames(p^.r);
end;
procedure writestrentry(p : pprocdeftree);
begin
if assigned(p^.l) then
writestrentry(p^.l);
{ write name label }
datasegment^.concat(new(pai_const_symbol,init(lab2str(p^.nl))));
datasegment^.concat(new(pai_const_symbol,init(p^.p^.mangledname)));
maybe_concat_external(p^.p^.owner,p^.p^.mangledname);
if assigned(p^.r) then
writestrentry(p^.r);
end;
function genstrmsgtab(_class : pobjectdef) : plabel;
var
r : plabel;
begin
root:=nil;
count:=0;
{ insert all message handlers into a tree, sorted by name }
_class^.publicsyms^.foreach(insertmsgstr);
{ write all names }
if assigned(root) then
writenames(root);
{ now start writing of the message string table }
getlabel(r);
datasegment^.concat(new(pai_label,init(r)));
genstrmsgtab:=r;
datasegment^.concat(new(pai_const,init_32bit(count)));
if assigned(root) then
begin
writestrentry(root);
disposeprocdeftree(root);
end;
end;
procedure insertint(p : pprocdeftree;var at : pprocdeftree);
var
i : longint;
begin
if at=nil then
begin
at:=p;
inc(count);
end
else
begin
i:=strcomp(p^.p^.messageinf.str,at^.p^.messageinf.str);
if p^.p^.messageinf.i<at^.p^.messageinf.i then
insertstr(p,at^.l)
else if p^.p^.messageinf.i>at^.p^.messageinf.i then
insertstr(p,at^.r)
else
Message1(parser_e_duplicate_message_label,tostr(p^.p^.messageinf.i));
end;
end;
procedure writeintentry(p : pprocdeftree);
begin
if assigned(p^.l) then
writeintentry(p^.l);
{ write name label }
datasegment^.concat(new(pai_const,init_32bit(p^.p^.messageinf.i)));
datasegment^.concat(new(pai_const_symbol,init(p^.p^.mangledname)));
maybe_concat_external(p^.p^.owner,p^.p^.mangledname);
if assigned(p^.r) then
writeintentry(p^.r);
end;
procedure insertmsgint(p : psym);{$ifndef FPC}far;{$endif FPC}
var
hp : pprocdef;
pt : pprocdeftree;
begin
if p^.typ=procsym then
begin
hp:=pprocsym(p)^.definition;
while assigned(hp) do
begin
if (hp^.options and pomsgint)<>0 then
begin
new(pt);
pt^.p:=hp;
pt^.l:=nil;
pt^.r:=nil;
insertint(pt,root);
end;
hp:=hp^.nextoverloaded;
end;
end;
end;
function genintmsgtab(_class : pobjectdef) : plabel;
var
r : plabel;
begin
root:=nil;
count:=0;
{ insert all message handlers into a tree, sorted by name }
_class^.publicsyms^.foreach(insertmsgint);
{ now start writing of the message string table }
getlabel(r);
datasegment^.concat(new(pai_label,init(r)));
genintmsgtab:=r;
datasegment^.concat(new(pai_const,init_32bit(count)));
if assigned(root) then
begin
writeintentry(root);
disposeprocdeftree(root);
end;
end;
type
pprocdefcoll = ^tprocdefcoll;
tprocdefcoll = record
next : pprocdefcoll;
data : pprocdef;
end;
psymcoll = ^tsymcoll;
tsymcoll = record
next : psymcoll;
name : pstring;
data : pprocdefcoll;
end;
var
wurzel : psymcoll;
nextvirtnumber : longint;
_c : pobjectdef;
has_constructor,has_virtual_method : boolean;
procedure eachsym(sym : psym);{$ifndef FPC}far;{$endif FPC}
var
procdefcoll : pprocdefcoll;
hp : pprocdef;
symcoll : psymcoll;
_name : string;
stored : boolean;
{ creates a new entry in the procsym list }
procedure newentry;
begin
{ if not, generate a new symbol item }
new(symcoll);
symcoll^.name:=stringdup(sym^.name);
symcoll^.next:=wurzel;
symcoll^.data:=nil;
wurzel:=symcoll;
hp:=pprocsym(sym)^.definition;
{ inserts all definitions }
while assigned(hp) do
begin
new(procdefcoll);
procdefcoll^.data:=hp;
procdefcoll^.next:=symcoll^.data;
symcoll^.data:=procdefcoll;
{ if it's a virtual method }
if (hp^.options and povirtualmethod)<>0 then
begin
{ then it gets a number ... }
hp^.extnumber:=nextvirtnumber;
{ and we inc the number }
inc(nextvirtnumber);
has_virtual_method:=true;
end;
if (hp^.options and poconstructor)<>0 then
has_constructor:=true;
{ check, if a method should be overridden }
if (hp^.options and pooverridingmethod)<>0 then
Message1(parser_e_nothing_to_be_overridden,_c^.name^+'.'+_name);
{ next overloaded method }
hp:=hp^.nextoverloaded;
end;
end;
begin
{ put only sub routines into the VMT }
if sym^.typ=procsym then
begin
_name:=sym^.name;
symcoll:=wurzel;
while assigned(symcoll) do
begin
{ does the symbol already exist in the list ? }
if _name=symcoll^.name^ then
begin
{ walk through all defs of the symbol }
hp:=pprocsym(sym)^.definition;
while assigned(hp) do
begin
{ compare with all stored definitions }
procdefcoll:=symcoll^.data;
stored:=false;
while assigned(procdefcoll) do
begin
{ compare parameters }
if equal_paras(procdefcoll^.data^.para1,hp^.para1,false) and
(
((procdefcoll^.data^.options and povirtualmethod)<>0) or
((hp^.options and povirtualmethod)<>0)
) then
begin
{ wenn sie gleich sind }
{ und eine davon virtual deklariert ist }
{ Fehler falls nur eine VIRTUAL }
if (procdefcoll^.data^.options and povirtualmethod)<>
(hp^.options and povirtualmethod) then
begin
{ in classes, we hide the old method }
if _c^.isclass then
begin
{ warn only if it is the first time,
we hide the method }
if _c=hp^._class then
Message1(parser_w_should_use_override,_c^.name^+'.'+_name);
newentry;
exit;
end
else
if _c=hp^._class then
begin
if (procdefcoll^.data^.options and povirtualmethod)<>0 then
Message1(parser_w_overloaded_are_not_both_virtual,_c^.name^+'.'+_name)
else
Message1(parser_w_overloaded_are_not_both_non_virtual,
_c^.name^+'.'+_name);
newentry;
exit;
end;
end;
{ check, if the overridden directive is set }
{ (povirtualmethod is set! }
{ class ? }
if _c^.isclass and
((hp^.options and pooverridingmethod)=0) then
begin
{ warn only if it is the first time,
we hide the method }
if _c=hp^._class then
Message1(parser_w_should_use_override,_c^.name^+'.'+_name);
newentry;
exit;
end;
{ error, if the return types aren't equal }
if not(is_equal(procdefcoll^.data^.retdef,hp^.retdef)) and
not((procdefcoll^.data^.retdef^.deftype=objectdef) and
(hp^.retdef^.deftype=objectdef) and
(pobjectdef(procdefcoll^.data^.retdef)^.isclass) and
(pobjectdef(hp^.retdef)^.isclass) and
(pobjectdef(hp^.retdef)^.isrelated(pobjectdef(procdefcoll^.data^.retdef)))) then
Message1(parser_e_overloaded_methodes_not_same_ret,_c^.name^+'.'+_name);
{ the flags have to match }
{ except abstract and override }
if (procdefcoll^.data^.options and not(poabstractmethod or pooverridingmethod))<>
(hp^.options and not(poabstractmethod or pooverridingmethod)) then
Message1(parser_e_header_dont_match_forward,_c^.name^+'.'+_name);
{ now set the number }
hp^.extnumber:=procdefcoll^.data^.extnumber;
{ and exchange }
procdefcoll^.data:=hp;
stored:=true;
end;
procdefcoll:=procdefcoll^.next;
end;
{ if it isn't saved in the list }
{ we create a new entry }
if not(stored) then
begin
new(procdefcoll);
procdefcoll^.data:=hp;
procdefcoll^.next:=symcoll^.data;
symcoll^.data:=procdefcoll;
{ if the method is virtual ... }
if (hp^.options and povirtualmethod)<>0 then
begin
{ ... it will get a number }
hp^.extnumber:=nextvirtnumber;
inc(nextvirtnumber);
end;
{ check, if a method should be overridden }
if (hp^.options and pooverridingmethod)<>0 then
Message1(parser_e_nothing_to_be_overridden,_c^.name^+'.'+_name);
end;
hp:=hp^.nextoverloaded;
end;
exit;
end;
symcoll:=symcoll^.next;
end;
newentry;
end;
end;
procedure genvmt(_class : pobjectdef);
procedure do_genvmt(p : pobjectdef);
begin
{ start with the base class }
if assigned(p^.childof) then
do_genvmt(p^.childof);
{ walk through all public syms }
_c:=_class;
{$ifdef tp}
p^.publicsyms^.foreach(eachsym);
{$else}
p^.publicsyms^.foreach(@eachsym);
{$endif}
end;
var
symcoll : psymcoll;
procdefcoll : pprocdefcoll;
i : longint;
begin
wurzel:=nil;
nextvirtnumber:=0;
has_constructor:=false;
has_virtual_method:=false;
{ generates a tree of all used methods }
do_genvmt(_class);
if has_virtual_method and not(has_constructor) then
Message1(parser_w_virtual_without_constructor,_class^.name^);
{ generates the VMT }
{ walk trough all numbers for virtual methods and search }
{ the method }
for i:=0 to nextvirtnumber-1 do
begin
symcoll:=wurzel;
{ walk trough all symbols }
while assigned(symcoll) do
begin
{ walk trough all methods }
procdefcoll:=symcoll^.data;
while assigned(procdefcoll) do
begin
{ writes the addresses to the VMT }
{ but only this which are declared as virtual }
if procdefcoll^.data^.extnumber=i then
begin
if (procdefcoll^.data^.options and povirtualmethod)<>0 then
begin
{ if a method is abstract, then is also the }
{ class abstract and it's not allow to }
{ generates an instance }
if (procdefcoll^.data^.options and poabstractmethod)<>0 then
begin
_class^.options:=_class^.options or oo_is_abstract;
datasegment^.concat(new(pai_const_symbol,
init('FPC_ABSTRACTERROR')));
end
else
begin
datasegment^.concat(new(pai_const_symbol,
init(procdefcoll^.data^.mangledname)));
maybe_concat_external(procdefcoll^.data^.owner,
procdefcoll^.data^.mangledname);
end;
end;
end;
procdefcoll:=procdefcoll^.next;
end;
symcoll:=symcoll^.next;
end;
end;
{ disposes the above generated tree }
symcoll:=wurzel;
while assigned(symcoll) do
begin
wurzel:=symcoll^.next;
stringdispose(symcoll^.name);
procdefcoll:=symcoll^.data;
while assigned(procdefcoll) do
begin
symcoll^.data:=procdefcoll^.next;
dispose(procdefcoll);
procdefcoll:=symcoll^.data;
end;
dispose(symcoll);
symcoll:=wurzel;
end;
end;
end.
{
$Log$
Revision 1.53 1999-02-25 21:02:57 peter
* ag386bin updates
+ coff writer
Revision 1.52 1999/02/24 09:51:44 florian
* wrong warning fixed, if a non-virtual method was hidden by a virtual
method (repoerted by Matthias Koeppe)
Revision 1.51 1999/02/22 23:33:31 florian
+ message directive for integers added
Revision 1.50 1999/02/22 20:13:42 florian
+ first implementation of message keyword
Revision 1.49 1999/02/16 00:45:30 peter
* fixed crashes by forgotten strpnew() for init_symbol
Revision 1.48 1999/02/09 23:03:08 florian
* check for duplicate field names in inherited classes/objects
* bug with self from the mailing list solved (the problem
was that classes were sometimes pushed wrong)
Revision 1.47 1999/01/27 00:14:01 florian
* "procedure of object"-stuff fixed
Revision 1.46 1999/01/21 22:10:54 peter
* fixed array of const
* generic platform independent high() support
Revision 1.45 1999/01/20 12:34:22 peter
* fixed typed file read/write
Revision 1.44 1999/01/15 11:33:03 pierre
* bug in mmx code removed
Revision 1.43 1998/12/30 13:41:20 peter
* released valuepara
Revision 1.42 1998/12/11 00:04:03 peter
+ globtype,tokens,version unit splitted from globals
Revision 1.41 1998/12/10 09:47:33 florian
+ basic operations with int64/qord (compiler with -dint64)
+ rtti of enumerations extended: names are now written
Revision 1.40 1998/12/04 10:18:14 florian
* some stuff for procedures of object added
* bug with overridden virtual constructors fixed (reported by Italo Gomes)
Revision 1.39 1998/11/27 14:50:55 peter
+ open strings, $P switch support
Revision 1.38 1998/11/18 15:44:24 peter
* VALUEPARA for tp7 compatible value parameters
Revision 1.37 1998/11/13 10:15:50 peter
* fixed ptr() with constants
Revision 1.36 1998/11/10 10:09:21 peter
* va_list -> array of const
Revision 1.35 1998/10/19 08:55:13 pierre
* wrong stabs info corrected once again !!
+ variable vmt offset with vmt field only if required
implemented now !!!
Revision 1.34 1998/10/12 09:50:06 florian
+ support of <procedure var type>:=<pointer> in delphi mode added
Revision 1.33 1998/10/06 20:43:30 peter
* fixed set of bugs. like set of false..true set of #1..#255 and
set of #1..true which was allowed
Revision 1.32 1998/10/05 21:33:35 peter
* fixed 161,165,166,167,168
Revision 1.31 1998/09/23 09:58:56 peter
* first working array of const things
Revision 1.30 1998/09/22 15:40:58 peter
* some extra ifdef GDB
Revision 1.29 1998/09/16 12:37:31 michael
Added FPC_ prefix to abstracterror
Revision 1.28 1998/09/09 16:44:23 florian
* I hope, the case bug is fixed now
Revision 1.27 1998/09/07 17:37:07 florian
* first fixes for published properties
Revision 1.26 1998/09/04 12:24:31 florian
* bug0159 fixed
Revision 1.25 1998/09/04 09:06:36 florian
* bug0132 fixed
Revision 1.24 1998/09/04 08:36:49 peter
* fixed boolean:=integer which is not explicit
Revision 1.23 1998/09/01 17:39:55 peter
+ internal constant functions
Revision 1.22 1998/09/01 12:53:28 peter
+ aktpackenum
Revision 1.21 1998/08/19 00:42:45 peter
+ subrange types for enums
+ checking for bounds type with ranges
Revision 1.20 1998/08/18 14:17:14 pierre
* bug about assigning the return value of a function to
a procvar fixed : warning
assigning a proc to a procvar need @ in FPC mode !!
* missing file/line info restored
Revision 1.19 1998/08/18 09:24:48 pierre
* small warning position bug fixed
* support_mmx switches splitting was missing
* rhide error and warning output corrected
Revision 1.18 1998/08/14 18:18:49 peter
+ dynamic set contruction
* smallsets are now working (always longint size)
Revision 1.17 1998/08/05 16:00:17 florian
* some fixes for ansi strings
Revision 1.16 1998/07/20 23:35:50 michael
Const ansistrings are not copied.
Revision 1.15 1998/07/18 22:54:32 florian
* some ansi/wide/longstring support fixed:
o parameter passing
o returning as result from functions
Revision 1.14 1998/06/12 14:50:50 peter
* removed the tree dependency to types.pas
* long_fil.pas support (not fully tested yet)
Revision 1.13 1998/06/03 22:49:07 peter
+ wordbool,longbool
* rename bis,von -> high,low
* moved some systemunit loading/creating to psystem.pas
Revision 1.12 1998/05/12 10:47:00 peter
* moved printstatus to verb_def
+ V_Normal which is between V_Error and V_Warning and doesn't have a
prefix like error: warning: and is included in V_Default
* fixed some messages
* first time parameter scan is only for -v and -T
- removed old style messages
Revision 1.11 1998/05/01 16:38:46 florian
* handling of private and protected fixed
+ change_keywords_to_tp implemented to remove
keywords which aren't supported by tp
* break and continue are now symbols of the system unit
+ widestring, longstring and ansistring type released
Revision 1.10 1998/04/29 10:34:08 pierre
+ added some code for ansistring (not complete nor working yet)
* corrected operator overloading
* corrected nasm output
+ started inline procedures
+ added starstarn : use ** for exponentiation (^ gave problems)
+ started UseTokenInfo cond to get accurate positions
Revision 1.9 1998/04/21 10:16:49 peter
* patches from strasbourg
* objects is not used anymore in the fpc compiled version
Revision 1.8 1998/04/12 22:39:44 florian
* problem with read access to properties solved
* correct handling of hidding methods via virtual (COM)
* correct result type of constructor calls (COM), the resulttype
depends now on the type of the class reference
Revision 1.7 1998/04/10 21:36:56 florian
+ some stuff to support method pointers (procedure of object) added
(declaration, parameter handling)
Revision 1.6 1998/04/10 15:39:49 florian
* more fixes to get classes.pas compiled
Revision 1.5 1998/04/09 23:02:16 florian
* small problems solved to get remake3 work
Revision 1.4 1998/04/08 16:58:09 pierre
* several bugfixes
ADD ADC and AND are also sign extended
nasm output OK (program still crashes at end
and creates wrong assembler files !!)
procsym types sym in tdef removed !!
Revision 1.3 1998/04/08 11:34:22 peter
* nasm works (linux only tested)
}
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