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{
Copyright (c) 1998-2002 by Peter Vreman
This unit implements the parsing of the switches like $I-
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
****************************************************************************
}
unit switches;
{$i fpcdefs.inc}
interface
procedure HandleSwitch(switch,state:char);
function CheckSwitch(switch,state:char):boolean;
implementation
uses
globtype,systems,
globals,verbose,fmodule;
{****************************************************************************
Main Switches Parsing
****************************************************************************}
type
TSwitchType=(ignoredsw,localsw,modulesw,globalsw,illegalsw,unsupportedsw,alignsw);
SwitchRec=record
typesw : TSwitchType;
setsw : byte;
end;
SwitchRecTable = array['A'..'Z'] of SwitchRec;
const
turboSwitchTable: SwitchRecTable =(
{A} (typesw:alignsw; setsw:ord(cs_localnone)),
{B} (typesw:localsw; setsw:ord(cs_full_boolean_eval)),
{C} (typesw:localsw; setsw:ord(cs_do_assertion)),
{D} (typesw:modulesw; setsw:ord(cs_debuginfo)),
{E} (typesw:modulesw; setsw:ord(cs_fp_emulation)),
{F} (typesw:ignoredsw; setsw:ord(cs_localnone)),
{G} (typesw:ignoredsw; setsw:ord(cs_localnone)),
{H} (typesw:localsw; setsw:ord(cs_ansistrings)),
{I} (typesw:localsw; setsw:ord(cs_check_io)),
{J} (typesw:localsw; setsw:ord(cs_typed_const_writable)),
{K} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{L} (typesw:modulesw; setsw:ord(cs_local_browser)),
{M} (typesw:localsw; setsw:ord(cs_generate_rtti)),
{N} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{O} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{P} (typesw:modulesw; setsw:ord(cs_openstring)),
{Q} (typesw:localsw; setsw:ord(cs_check_overflow)),
{R} (typesw:localsw; setsw:ord(cs_check_range)),
{S} (typesw:localsw; setsw:ord(cs_check_stack)),
{T} (typesw:localsw; setsw:ord(cs_typed_addresses)),
{U} (typesw:illegalsw; setsw:ord(cs_localnone)),
{V} (typesw:localsw; setsw:ord(cs_strict_var_strings)),
{W} (typesw:localsw; setsw:ord(cs_generate_stackframes)),
{X} (typesw:modulesw; setsw:ord(cs_extsyntax)),
{Y} (typesw:modulesw; setsw:ord(cs_browser)),
{Z} (typesw:illegalsw; setsw:ord(cs_localnone))
);
macSwitchTable: SwitchRecTable =(
{A} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{B} (typesw:localsw; setsw:ord(cs_full_boolean_eval)),
{C} (typesw:localsw; setsw:ord(cs_do_assertion)),
{D} (typesw:modulesw; setsw:ord(cs_debuginfo)),
{E} (typesw:modulesw; setsw:ord(cs_fp_emulation)),
{F} (typesw:ignoredsw; setsw:ord(cs_localnone)),
{G} (typesw:ignoredsw; setsw:ord(cs_localnone)),
{H} (typesw:localsw; setsw:ord(cs_ansistrings)),
{I} (typesw:localsw; setsw:ord(cs_check_io)),
{J} (typesw:localsw; setsw:ord(cs_external_var)),
{K} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{L} (typesw:modulesw; setsw:ord(cs_local_browser)),
{M} (typesw:localsw; setsw:ord(cs_generate_rtti)),
{N} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{O} (typesw:unsupportedsw; setsw:ord(cs_localnone)),
{P} (typesw:modulesw; setsw:ord(cs_openstring)),
{Q} (typesw:localsw; setsw:ord(cs_check_overflow)),
{R} (typesw:localsw; setsw:ord(cs_check_range)),
{S} (typesw:localsw; setsw:ord(cs_check_stack)),
{T} (typesw:localsw; setsw:ord(cs_typed_addresses)),
{U} (typesw:illegalsw; setsw:ord(cs_localnone)),
{V} (typesw:localsw; setsw:ord(cs_strict_var_strings)),
{W} (typesw:localsw; setsw:ord(cs_generate_stackframes)),
{X} (typesw:modulesw; setsw:ord(cs_extsyntax)),
{Y} (typesw:modulesw; setsw:ord(cs_browser)),
{Z} (typesw:localsw; setsw:ord(cs_externally_visible))
);
procedure HandleSwitch(switch,state:char);
var
switchTablePtr: ^SwitchRecTable;
begin
switch:=upcase(switch);
{ Is the Switch in the letters ? }
if not ((switch in ['A'..'Z']) and (state in ['-','+'])) then
begin
Message(scan_w_illegal_switch);
exit;
end;
{ Select switch table }
if m_mac in aktmodeswitches then
switchTablePtr:= @macSwitchTable
else
switchTablePtr:= @turboSwitchTable;
{ Handle the switch }
with switchTablePtr^[switch] do
begin
case typesw of
alignsw:
if state='+' then
aktpackrecords:=4
else
aktpackrecords:=1;
ignoredsw :
Message1(scan_n_ignored_switch,'$'+switch);
illegalsw :
Message1(scan_w_illegal_switch,'$'+switch);
unsupportedsw :
Message1(scan_w_unsupported_switch,'$'+switch);
localsw :
begin
if not localswitcheschanged then
nextaktlocalswitches:=aktlocalswitches;
if state='+' then
include(nextaktlocalswitches,tlocalswitch(setsw))
else
exclude(nextaktlocalswitches,tlocalswitch(setsw));
localswitcheschanged:=true;
end;
modulesw :
begin
if current_module.in_global then
begin
if state='+' then
include(aktmoduleswitches,tmoduleswitch(setsw))
else
begin
{ Turning off debuginfo when lineinfo is requested
is not possible }
if not((cs_use_lineinfo in aktglobalswitches) and
(tmoduleswitch(setsw)=cs_debuginfo)) then
exclude(aktmoduleswitches,tmoduleswitch(setsw));
end;
end
else
Message(scan_w_switch_is_global);
end;
globalsw :
begin
if current_module.in_global and (current_module=main_module) then
begin
if state='+' then
include(aktglobalswitches,tglobalswitch(setsw))
else
exclude(aktglobalswitches,tglobalswitch(setsw));
end
else
Message(scan_w_switch_is_global);
end;
end;
end;
end;
function CheckSwitch(switch,state:char):boolean;
var
found : boolean;
switchTablePtr: ^SwitchRecTable;
begin
switch:=upcase(switch);
{ Is the Switch in the letters ? }
if not ((switch in ['A'..'Z']) and (state in ['-','+'])) then
begin
Message(scan_w_illegal_switch);
CheckSwitch:=false;
exit;
end;
{ Select switch table }
if m_mac in aktmodeswitches then
switchTablePtr:= @macSwitchTable
else
switchTablePtr:= @turboSwitchTable;
{ Check the switch }
with switchTablePtr^[switch] do
begin
case typesw of
localsw : found:=(tlocalswitch(setsw) in aktlocalswitches);
modulesw : found:=(tmoduleswitch(setsw) in aktmoduleswitches);
globalsw : found:=(tglobalswitch(setsw) in aktglobalswitches);
else
found:=false;
end;
if state='-' then
found:=not found;
CheckSwitch:=found;
end;
end;
end.
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