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{
Copyright (c) 1998-2005 by Florian Klaempfl
This unit handles the exports parsing
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 pexports;
{$i fpcdefs.inc}
interface
{ reads an exports statement in a library }
procedure read_exports;
implementation
uses
{ common }
cutils,
{ global }
globals,globtype,tokens,verbose,constexp,
systems,
ppu,fmodule,
{ symtable }
symconst,symbase,symdef,symtype,symsym,
{ pass 1 }
node,
ncon,
{ parser }
scanner,
pbase,pexpr,
{ obj-c }
objcutil,
{ link }
gendef,export
;
procedure read_exports;
var
orgs,
DefString,
InternalProcName : string;
pd : tprocdef;
pt : tnode;
srsym : tsym;
srsymtable : TSymtable;
hpname : shortstring;
index : longint;
options : word;
function IsGreater(hp1,hp2:texported_item):boolean;
var
i2 : boolean;
begin
i2:=(hp2.options and eo_index)<>0;
if (hp1.options and eo_index)<>0 then
begin
if i2 then
IsGreater:=hp1.index>hp2.index
else
IsGreater:=false;
end
else
IsGreater:=i2;
end;
begin
current_module.flags:=current_module.flags or uf_has_exports;
DefString:='';
InternalProcName:='';
consume(_EXPORTS);
repeat
hpname:='';
options:=0;
index:=0;
if token=_ID then
begin
consume_sym_orgid(srsym,srsymtable,orgs);
{ orgpattern is still valid here }
InternalProcName:='';
case srsym.typ of
staticvarsym :
InternalProcName:=tstaticvarsym(srsym).mangledname;
procsym :
begin
pd:=tprocdef(tprocsym(srsym).ProcdefList[0]);
if (Tprocsym(srsym).ProcdefList.Count>1) or
(po_kylixlocal in pd.procoptions) or
((tf_need_export in target_info.flags) and
not(po_exports in pd.procoptions)) then
Message(parser_e_illegal_symbol_exported)
else
InternalProcName:=pd.mangledname;
end;
typesym :
begin
if not is_objcclass(ttypesym(srsym).typedef) then
Message(parser_e_illegal_symbol_exported)
end;
else
Message(parser_e_illegal_symbol_exported)
end;
if (srsym.typ<>typesym) then
begin
if InternalProcName<>'' then
begin
{ This is wrong if the first is not
an underline }
if InternalProcName[1]='_' then
delete(InternalProcName,1,1)
else if (target_info.system in [system_i386_win32,system_i386_wdosx,system_arm_wince,system_i386_wince]) and UseDeffileForExports then
begin
Message(parser_e_dlltool_unit_var_problem);
Message(parser_e_dlltool_unit_var_problem2);
end;
if length(InternalProcName)<2 then
Message(parser_e_procname_to_short_for_export);
DefString:=srsym.realname+'='+InternalProcName;
end;
if try_to_consume(_INDEX) then
begin
pt:=comp_expr(true,false);
if pt.nodetype=ordconstn then
if (Tordconstnode(pt).value<int64(low(index))) or
(Tordconstnode(pt).value>int64(high(index))) then
begin
index:=0;
message3(type_e_range_check_error_bounds,tostr(Tordconstnode(pt).value),tostr(low(index)),tostr(high(index)))
end
else
index:=Tordconstnode(pt).value.svalue
else
begin
index:=0;
consume(_INTCONST);
end;
options:=options or eo_index;
pt.free;
if target_info.system in [system_i386_win32,system_i386_wdosx,system_arm_wince,system_i386_wince] then
DefString:=srsym.realname+'='+InternalProcName+' @ '+tostr(index)
else
DefString:=srsym.realname+'='+InternalProcName; {Index ignored!}
end;
if try_to_consume(_NAME) then
begin
pt:=comp_expr(true,false);
if pt.nodetype=stringconstn then
hpname:=strpas(tstringconstnode(pt).value_str)
else if is_constcharnode(pt) then
hpname:=chr(tordconstnode(pt).value.svalue and $ff)
else
consume(_CSTRING);
options:=options or eo_name;
pt.free;
DefString:=hpname+'='+InternalProcName;
end;
if try_to_consume(_RESIDENT) then
begin
options:=options or eo_resident;
DefString:=srsym.realname+'='+InternalProcName;{Resident ignored!}
end;
if (DefString<>'') and UseDeffileForExports then
DefFile.AddExport(DefString);
end;
case srsym.typ of
procsym:
begin
{ if no specific name or index was given, then if }
{ the procedure has aliases defined export those, }
{ otherwise export the name as it appears in the }
{ export section (it doesn't make sense to export }
{ the generic mangled name, because the name of }
{ the parent unit is used in that) }
if ((options and (eo_name or eo_index))=0) and
(tprocdef(tprocsym(srsym).procdeflist[0]).aliasnames.count>1) then
exportallprocsymnames(tprocsym(srsym),options)
else
begin
{ there's a name or an index -> export only one name }
{ correct? Or can you export multiple names with the }
{ same index? And/or should we also export the aliases }
{ if a name is specified? (JM) }
if ((options and eo_name)=0) then
{ Export names are not mangled on Windows and OS/2 }
if (target_info.system in (systems_all_windows+[system_i386_emx, system_i386_os2])) then
hpname:=orgs
{ Use set mangled name in case of cdecl/cppdecl/mwpascal }
{ and no name specified }
else if (tprocdef(tprocsym(srsym).procdeflist[0]).proccalloption in [pocall_cdecl,pocall_mwpascal]) then
hpname:=target_info.cprefix+tprocsym(srsym).realname
else if (tprocdef(tprocsym(srsym).procdeflist[0]).proccalloption in [pocall_cppdecl]) then
hpname:=target_info.cprefix+tprocdef(tprocsym(srsym).procdeflist[0]).cplusplusmangledname
else
hpname:=orgs;
exportprocsym(srsym,hpname,index,options);
end
end;
staticvarsym:
begin
if ((options and eo_name)=0) then
{ for "cvar" }
if (vo_has_mangledname in tstaticvarsym(srsym).varoptions) then
hpname:=srsym.mangledname
else
hpname:=orgs;
exportvarsym(srsym,hpname,index,options);
end;
typesym:
begin
case ttypesym(srsym).typedef.typ of
objectdef:
case tobjectdef(ttypesym(srsym).typedef).objecttype of
odt_objcclass:
exportobjcclass(tobjectdef(ttypesym(srsym).typedef));
else
internalerror(2009092601);
end;
else
internalerror(2009092602);
end;
end;
end
end
else
consume(_ID);
until not try_to_consume(_COMMA);
consume(_SEMICOLON);
if not DefFile.empty then
DefFile.writefile;
end;
end.
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