{
Copyright (c) 1998-2002 by Florian Klaempfl
This unit implements the scanner part and handling of the switches
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 scanner;
{$i fpcdefs.inc}
interface
uses
cclasses,
globtype,globals,version,tokens,
verbose,comphook,
finput,
widestr;
const
max_include_nesting=32;
max_macro_nesting=16;
preprocbufsize=32*1024;
type
tcommentstyle = (comment_none,comment_tp,comment_oldtp,comment_delphi,comment_c);
tscannerfile = class;
preproctyp = (pp_ifdef,pp_ifndef,pp_if,pp_ifopt,pp_else,pp_elseif);
tpreprocstack = class
typ : preproctyp;
accept : boolean;
next : tpreprocstack;
name : TIDString;
line_nb : longint;
owner : tscannerfile;
constructor Create(atyp:preproctyp;a:boolean;n:tpreprocstack);
end;
tdirectiveproc=procedure;
tdirectiveitem = class(TFPHashObject)
public
is_conditional : boolean;
proc : tdirectiveproc;
constructor Create(AList:TFPHashObjectList;const n:string;p:tdirectiveproc);
constructor CreateCond(AList:TFPHashObjectList;const n:string;p:tdirectiveproc);
end;
tcompile_time_predicate = function(var valuedescr: String) : Boolean;
tspecialgenerictoken = (ST_LOADSETTINGS,ST_LINE,ST_COLUMN,ST_FILEINDEX);
tscannerfile = class
public
inputfile : tinputfile; { current inputfile list }
inputfilecount : longint;
inputbuffer, { input buffer }
inputpointer : pchar;
inputstart : longint;
line_no, { line }
lastlinepos : longint;
lasttokenpos : longint; { token }
lasttoken,
nexttoken : ttoken;
replaysavetoken : ttoken;
replaytokenbuf,
recordtokenbuf : tdynamicarray;
{ old settings, i.e. settings specialization was started }
old_settings,
{ last settings we stored }
last_settings : tsettings;
{ last filepos we stored }
last_filepos : tfileposinfo;
comment_level,
yylexcount : longint;
lastasmgetchar : char;
ignoredirectives : TFPHashList; { ignore directives, used to give warnings only once }
preprocstack : tpreprocstack;
in_asm_string : boolean;
preproc_pattern : string;
preproc_token : ttoken;
constructor Create(const fn:string);
destructor Destroy;override;
{ File buffer things }
function openinputfile:boolean;
procedure closeinputfile;
function tempopeninputfile:boolean;
procedure tempcloseinputfile;
procedure saveinputfile;
procedure restoreinputfile;
procedure firstfile;
procedure nextfile;
procedure addfile(hp:tinputfile);
procedure reload;
procedure insertmacro(const macname:string;p:pchar;len,line,fileindex:longint);
{ Scanner things }
procedure gettokenpos;
procedure inc_comment_level;
procedure dec_comment_level;
procedure illegal_char(c:char);
procedure end_of_file;
procedure checkpreprocstack;
procedure poppreprocstack;
procedure ifpreprocstack(atyp : preproctyp;compile_time_predicate:tcompile_time_predicate;messid:longint);
procedure elseifpreprocstack(compile_time_predicate:tcompile_time_predicate);
procedure elsepreprocstack;
procedure handleconditional(p:tdirectiveitem);
procedure handledirectives;
procedure linebreak;
procedure recordtoken;
procedure startrecordtokens(buf:tdynamicarray);
procedure stoprecordtokens;
procedure replaytoken;
procedure startreplaytokens(buf:tdynamicarray);
procedure readchar;
procedure readstring;
procedure readnumber;
function readid:string;
function readval:longint;
function readval_asstring:string;
function readcomment:string;
function readquotedstring:string;
function readstate:char;
function readstatedefault:char;
procedure skipspace;
procedure skipuntildirective;
procedure skipcomment;
procedure skipdelphicomment;
procedure skipoldtpcomment;
procedure readtoken(allowrecordtoken:boolean);
function readpreproc:ttoken;
function asmgetcharstart : char;
function asmgetchar:char;
end;
{$ifdef PREPROCWRITE}
tpreprocfile=class
f : text;
buf : pointer;
spacefound,
eolfound : boolean;
constructor create(const fn:string);
destructor destroy;
procedure Add(const s:string);
procedure AddSpace;
end;
{$endif PREPROCWRITE}
var
{ read strings }
c : char;
orgpattern,
pattern : string;
patternw : pcompilerwidestring;
{ token }
token, { current token being parsed }
idtoken : ttoken; { holds the token if the pattern is a known word }
current_scanner : tscannerfile; { current scanner in use }
aktcommentstyle : tcommentstyle; { needed to use read_comment from directives }
{$ifdef PREPROCWRITE}
preprocfile : tpreprocfile; { used with only preprocessing }
{$endif PREPROCWRITE}
type
tdirectivemode = (directive_all, directive_turbo, directive_mac);
procedure AddDirective(const s:string; dm: tdirectivemode; p:tdirectiveproc);
procedure AddConditional(const s:string; dm: tdirectivemode; p:tdirectiveproc);
procedure InitScanner;
procedure DoneScanner;
{To be called when the language mode is finally determined}
Function SetCompileMode(const s:string; changeInit: boolean):boolean;
implementation
uses
SysUtils,
cutils,cfileutils,
systems,
switches,
symbase,symtable,symtype,symsym,symconst,symdef,defutil,
fmodule;
var
{ dictionaries with the supported directives }
turbo_scannerdirectives : TFPHashObjectList; { for other modes }
mac_scannerdirectives : TFPHashObjectList; { for mode mac }
{*****************************************************************************
Helper routines
*****************************************************************************}
const
{ use any special name that is an invalid file name to avoid problems }
preprocstring : array [preproctyp] of string[7]
= ('$IFDEF','$IFNDEF','$IF','$IFOPT','$ELSE','$ELSEIF');
function is_keyword(const s:string):boolean;
var
low,high,mid : longint;
begin
if not (length(s) in [tokenlenmin..tokenlenmax]) or
not (s[1] in ['a'..'z','A'..'Z']) then
begin
is_keyword:=false;
exit;
end;
low:=ord(tokenidx^[length(s),s[1]].first);
high:=ord(tokenidx^[length(s),s[1]].last);
while low<high do
begin
mid:=(high+low+1) shr 1;
if pattern<tokeninfo^[ttoken(mid)].str then
high:=mid-1
else
low:=mid;
end;
is_keyword:=(pattern=tokeninfo^[ttoken(high)].str) and
(tokeninfo^[ttoken(high)].keyword in current_settings.modeswitches);
end;
Function SetCompileMode(const s:string; changeInit: boolean):boolean;
var
b : boolean;
oldmodeswitches : tmodeswitches;
begin
oldmodeswitches:=current_settings.modeswitches;
b:=true;
if s='DEFAULT' then
current_settings.modeswitches:=fpcmodeswitches
else
if s='DELPHI' then
current_settings.modeswitches:=delphimodeswitches
else
if s='TP' then
current_settings.modeswitches:=tpmodeswitches
else
if s='FPC' then begin
current_settings.modeswitches:=fpcmodeswitches;
{ TODO: enable this for 2.3/2.9 }
// include(current_settings.localswitches, cs_typed_addresses);
end else
if s='OBJFPC' then begin
current_settings.modeswitches:=objfpcmodeswitches;
{ TODO: enable this for 2.3/2.9 }
// include(current_settings.localswitches, cs_typed_addresses);
end
{$ifdef gpc_mode}
else if s='GPC' then
current_settings.modeswitches:=gpcmodeswitches
{$endif}
else
if s='MACPAS' then
current_settings.modeswitches:=macmodeswitches
else
b:=false;
if b and changeInit then
init_settings.modeswitches := current_settings.modeswitches;
if b then
begin
{ resolve all postponed switch changes }
if localswitcheschanged then
begin
current_settings.localswitches:=nextlocalswitches;
localswitcheschanged:=false;
end;
{ turn ansistrings on by default ? }
if (m_default_ansistring in current_settings.modeswitches) then
begin
include(current_settings.localswitches,cs_ansistrings);
if changeinit then
include(init_settings.localswitches,cs_ansistrings);
end
else
begin
exclude(current_settings.localswitches,cs_ansistrings);
if changeinit then
exclude(init_settings.localswitches,cs_ansistrings);
end;
{ turn inline on by default ? }
if (m_default_inline in current_settings.modeswitches) then
begin
include(current_settings.localswitches,cs_do_inline);
if changeinit then
include(init_settings.localswitches,cs_do_inline);
end
else
begin
exclude(current_settings.localswitches,cs_ansistrings);
if changeinit then
exclude(init_settings.localswitches,cs_ansistrings);
end;
{ turn on bitpacking for mode macpas }
if (m_mac in current_settings.modeswitches) then
begin
include(current_settings.localswitches,cs_bitpacking);
if changeinit then
include(init_settings.localswitches,cs_bitpacking);
end;
{ support goto/label by default in delphi/tp7/mac modes }
if ([m_delphi,m_tp7,m_mac] * current_settings.modeswitches <> []) then
begin
include(current_settings.moduleswitches,cs_support_goto);
if changeinit then
include(init_settings.moduleswitches,cs_support_goto);
end;
{ Default enum packing for delphi/tp7 }
if (m_tp7 in current_settings.modeswitches) or
(m_delphi in current_settings.modeswitches) then
current_settings.packenum:=1
else if (m_mac in current_settings.modeswitches) then
{ compatible with Metrowerks Pascal }
current_settings.packenum:=2
else
current_settings.packenum:=4;
if changeinit then
init_settings.packenum:=current_settings.packenum;
{$ifdef i386}
{ Default to intel assembler for delphi/tp7 on i386 }
if (m_delphi in current_settings.modeswitches) or
(m_tp7 in current_settings.modeswitches) then
current_settings.asmmode:=asmmode_i386_intel;
if changeinit then
init_settings.asmmode:=current_settings.asmmode;
{$endif i386}
{ Exception support explicitly turned on (mainly for macpas, to }
{ compensate for lack of interprocedural goto support) }
if (cs_support_exceptions in current_settings.globalswitches) then
include(current_settings.modeswitches,m_except);
{ Undefine old symbol }
if (m_delphi in oldmodeswitches) then
undef_system_macro('FPC_DELPHI')
else if (m_tp7 in oldmodeswitches) then
undef_system_macro('FPC_TP')
else if (m_objfpc in oldmodeswitches) then
undef_system_macro('FPC_OBJFPC')
{$ifdef gpc_mode}
else if (m_gpc in oldmodeswitches) then
undef_system_macro('FPC_GPC')
{$endif}
else if (m_mac in oldmodeswitches) then
undef_system_macro('FPC_MACPAS');
{ define new symbol in delphi,objfpc,tp,gpc,macpas mode }
if (m_delphi in current_settings.modeswitches) then
def_system_macro('FPC_DELPHI')
else if (m_tp7 in current_settings.modeswitches) then
def_system_macro('FPC_TP')
else if (m_objfpc in current_settings.modeswitches) then
def_system_macro('FPC_OBJFPC')
{$ifdef gpc_mode}
else if (m_gpc in current_settings.modeswitches) then
def_system_macro('FPC_GPC')
{$endif}
else if (m_mac in current_settings.modeswitches) then
def_system_macro('FPC_MACPAS');
end;
SetCompileMode:=b;
end;
{*****************************************************************************
Conditional Directives
*****************************************************************************}
procedure dir_else;
begin
current_scanner.elsepreprocstack;
end;
procedure dir_endif;
begin
current_scanner.poppreprocstack;
end;
function isdef(var valuedescr: String): Boolean;
var
hs : string;
mac : tmacro;
begin
current_scanner.skipspace;
hs:=current_scanner.readid;
valuedescr:= hs;
if hs='' then
Message(scan_e_error_in_preproc_expr);
mac:=tmacro(search_macro(hs));
if assigned(mac) then
mac.is_used:=true;
isdef:= assigned(mac) and mac.defined;
end;
procedure dir_ifdef;
begin
current_scanner.ifpreprocstack(pp_ifdef,@isdef,scan_c_ifdef_found);
end;
function isnotdef(var valuedescr: String): Boolean;
var
hs : string;
mac : tmacro;
begin
current_scanner.skipspace;
hs:=current_scanner.readid;
valuedescr:= hs;
if hs='' then
Message(scan_e_error_in_preproc_expr);
mac:=tmacro(search_macro(hs));
if assigned(mac) then
mac.is_used:=true;
isnotdef:= not (assigned(mac) and mac.defined);
end;
procedure dir_ifndef;
begin
current_scanner.ifpreprocstack(pp_ifndef,@isnotdef,scan_c_ifndef_found);
end;
function opt_check(var valuedescr: String): Boolean;
var
hs : string;
state : char;
begin
opt_check:= false;
current_scanner.skipspace;
hs:=current_scanner.readid;
valuedescr:= hs;
if (length(hs)>1) then
Message1(scan_w_illegal_switch,hs)
else
begin
state:=current_scanner.ReadState;
if state in ['-','+'] then
opt_check:=CheckSwitch(hs[1],state)
else
Message(scan_e_error_in_preproc_expr);
end;
end;
procedure dir_ifopt;
begin
current_scanner.ifpreprocstack(pp_ifopt,@opt_check,scan_c_ifopt_found);
end;
procedure dir_libprefix;
var
s : string;
begin
current_scanner.skipspace;
if c <> '''' then
Message2(scan_f_syn_expected, '''', c);
s := current_scanner.readquotedstring;
stringdispose(outputprefix);
outputprefix := stringdup(s);
with current_module do
setfilename(paramfn^, paramallowoutput);
end;
procedure dir_libsuffix;
var
s : string;
begin
current_scanner.skipspace;
if c <> '''' then
Message2(scan_f_syn_expected, '''', c);
s := current_scanner.readquotedstring;
stringdispose(outputsuffix);
outputsuffix := stringdup(s);
with current_module do
setfilename(paramfn^, paramallowoutput);
end;
procedure dir_extension;
var
s : string;
begin
current_scanner.skipspace;
if c <> '''' then
Message2(scan_f_syn_expected, '''', c);
s := current_scanner.readquotedstring;
if OutputFileName='' then
OutputFileName:=InputFileName;
OutputFileName:=ChangeFileExt(OutputFileName,'.'+s);
with current_module do
setfilename(paramfn^, paramallowoutput);
end;
{
Compile time expression type check
----------------------------------
Each subexpression returns its type to the caller, which then can
do type check. Since data types of compile time expressions is
not well defined, the type system does a best effort. The drawback is
that some errors might not be detected.
Instead of returning a particular data type, a set of possible data types
are returned. This way ambigouos types can be handled. For instance a
value of 1 can be both a boolean and and integer.
Booleans
--------
The following forms of boolean values are supported:
* C coded, that is 0 is false, non-zero is true.
* TRUE/FALSE for mac style compile time variables
Thus boolean mac compile time variables are always stored as TRUE/FALSE.
When a compile time expression is evaluated, they are then translated
to C coded booleans (0/1), to simplify for the expression evaluator.
Note that this scheme then also of support mac compile time variables which
are 0/1 but with a boolean meaning.
The TRUE/FALSE format is new from 22 august 2005, but the above scheme
means that units which is not recompiled, and thus stores
compile time variables as the old format (0/1), continue to work.
Short circuit evaluation
------------------------
For this to work, the part of a compile time expression which is short
circuited, should not be evaluated, while it still should be parsed.
Therefor there is a parameter eval, telling whether evaluation is needed.
In case not, the value returned can be arbitrary.
}
type
{Compile time expression types}
TCTEType = (ctetBoolean, ctetInteger, ctetString, ctetSet);
TCTETypeSet = set of TCTEType;
const
cteTypeNames : array[TCTEType] of string[10] = (
'BOOLEAN','INTEGER','STRING','SET');
{Subset of types which can be elements in sets.}
setelementdefs = [ctetBoolean, ctetInteger, ctetString];
function GetCTETypeName(t: TCTETypeSet): String;
var
i: TCTEType;
begin
result:= '';
for i:= Low(TCTEType) to High(TCTEType) do
if i in t then
if result = '' then
result:= cteTypeNames[i]
else
result:= result + ' or ' + cteTypeNames[i];
end;
procedure CTEError(actType, desiredExprType: TCTETypeSet; place: String);
begin
Message3(scan_e_compile_time_typeerror,
GetCTETypeName(desiredExprType),
GetCTETypeName(actType),
place
);
end;
function parse_compiler_expr(var compileExprType: TCTETypeSet):string;
function read_expr(var exprType: TCTETypeSet; eval : Boolean) : string; forward;
procedure preproc_consume(t : ttoken);
begin
if t<>current_scanner.preproc_token then
Message(scan_e_preproc_syntax_error);
current_scanner.preproc_token:=current_scanner.readpreproc;
end;
function preproc_substitutedtoken(var macroType: TCTETypeSet; eval : Boolean): string;
{ Currently this parses identifiers as well as numbers.
The result from this procedure can either be that the token
itself is a value, or that it is a compile time variable/macro,
which then is substituted for another value (for macros
recursivelly substituted).}
var
hs: string;
mac : tmacro;
macrocount,
len : integer;
numres : longint;
w: word;
begin
result := current_scanner.preproc_pattern;
if not eval then
exit;
mac:= nil;
{ Substitue macros and compiler variables with their content/value.
For real macros also do recursive substitution. }
macrocount:=0;
repeat
mac:=tmacro(search_macro(result));
inc(macrocount);
if macrocount>max_macro_nesting then
begin
Message(scan_w_macro_too_deep);
break;
end;
if assigned(mac) and mac.defined then
if assigned(mac.buftext) then
begin
if mac.buflen>255 then
begin
len:=255;
Message(scan_w_macro_cut_after_255_chars);
end
else
len:=mac.buflen;
hs[0]:=char(len);
move(mac.buftext^,hs[1],len);
result:=upcase(hs);
mac.is_used:=true;
end
else
begin
Message1(scan_e_error_macro_lacks_value, result);
break;
end
else
begin
break;
end;
if mac.is_compiler_var then
break;
until false;
{ At this point, result do contain the value. Do some decoding and
determine the type.}
val(result,numres,w);
if (w=0) then {It is an integer}
begin
if (numres = 0) or (numres = 1) then
macroType := [ctetInteger, ctetBoolean]
else
macroType := [ctetInteger];
end
else if assigned(mac) and (m_mac in current_settings.modeswitches) and (result='FALSE') then
begin
result:= '0';
macroType:= [ctetBoolean];
end
else if assigned(mac) and (m_mac in current_settings.modeswitches) and (result='TRUE') then
begin
result:= '1';
macroType:= [ctetBoolean];
end
else if (m_mac in current_settings.modeswitches) and
(not assigned(mac) or not mac.defined) and
(macrocount = 1) then
begin
{Errors in mode mac is issued here. For non macpas modes there is
more liberty, but the error will eventually be caught at a later stage.}
Message1(scan_e_error_macro_undefined, result);
macroType:= [ctetString]; {Just to have something}
end
else
macroType:= [ctetString];
end;
function read_factor(var factorType: TCTETypeSet; eval : Boolean) : string;
var
hs : string;
mac: tmacro;
srsym : tsym;
srsymtable : TSymtable;
l : longint;
w : integer;
hasKlammer: Boolean;
setElemType : TCTETypeSet;
begin
if current_scanner.preproc_token=_ID then
begin
if current_scanner.preproc_pattern='DEFINED' then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_LKLAMMER then
begin
preproc_consume(_LKLAMMER);
current_scanner.skipspace;
hasKlammer:= true;
end
else if (m_mac in current_settings.modeswitches) then
hasKlammer:= false
else
Message(scan_e_error_in_preproc_expr);
if current_scanner.preproc_token =_ID then
begin
hs := current_scanner.preproc_pattern;
mac := tmacro(search_macro(hs));
if assigned(mac) and mac.defined then
begin
hs := '1';
mac.is_used:=true;
end
else
hs := '0';
read_factor := hs;
preproc_consume(_ID);
current_scanner.skipspace;
end
else
Message(scan_e_error_in_preproc_expr);
if hasKlammer then
if current_scanner.preproc_token =_RKLAMMER then
preproc_consume(_RKLAMMER)
else
Message(scan_e_error_in_preproc_expr);
end
else
if (m_mac in current_settings.modeswitches) and (current_scanner.preproc_pattern='UNDEFINED') then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_ID then
begin
hs := current_scanner.preproc_pattern;
mac := tmacro(search_macro(hs));
if assigned(mac) then
begin
hs := '0';
mac.is_used:=true;
end
else
hs := '1';
read_factor := hs;
preproc_consume(_ID);
current_scanner.skipspace;
end
else
Message(scan_e_error_in_preproc_expr);
end
else
if (m_mac in current_settings.modeswitches) and (current_scanner.preproc_pattern='OPTION') then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_LKLAMMER then
begin
preproc_consume(_LKLAMMER);
current_scanner.skipspace;
end
else
Message(scan_e_error_in_preproc_expr);
if not (current_scanner.preproc_token = _ID) then
Message(scan_e_error_in_preproc_expr);
hs:=current_scanner.preproc_pattern;
if (length(hs) > 1) then
{This is allowed in Metrowerks Pascal}
Message(scan_e_error_in_preproc_expr)
else
begin
if CheckSwitch(hs[1],'+') then
read_factor := '1'
else
read_factor := '0';
end;
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_RKLAMMER then
preproc_consume(_RKLAMMER)
else
Message(scan_e_error_in_preproc_expr);
end
else
if current_scanner.preproc_pattern='SIZEOF' then
begin
factorType:= [ctetInteger];
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_LKLAMMER then
begin
preproc_consume(_LKLAMMER);
current_scanner.skipspace;
end
else
Message(scan_e_preproc_syntax_error);
if eval then
if searchsym(current_scanner.preproc_pattern,srsym,srsymtable) then
begin
l:=0;
case srsym.typ of
staticvarsym,
localvarsym,
paravarsym :
l:=tabstractvarsym(srsym).getsize;
typesym:
l:=ttypesym(srsym).typedef.size;
else
Message(scan_e_error_in_preproc_expr);
end;
str(l,read_factor);
end
else
Message1(sym_e_id_not_found,current_scanner.preproc_pattern);
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_RKLAMMER then
preproc_consume(_RKLAMMER)
else
Message(scan_e_preproc_syntax_error);
end
else
if current_scanner.preproc_pattern='DECLARED' then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
current_scanner.skipspace;
if current_scanner.preproc_token =_LKLAMMER then
begin
preproc_consume(_LKLAMMER);
current_scanner.skipspace;
end
else
Message(scan_e_error_in_preproc_expr);
if current_scanner.preproc_token =_ID then
begin
hs := upper(current_scanner.preproc_pattern);
if searchsym(hs,srsym,srsymtable) then
hs := '1'
else
hs := '0';
read_factor := hs;
preproc_consume(_ID);
current_scanner.skipspace;
end
else
Message(scan_e_error_in_preproc_expr);
if current_scanner.preproc_token =_RKLAMMER then
preproc_consume(_RKLAMMER)
else
Message(scan_e_error_in_preproc_expr);
end
else
if current_scanner.preproc_pattern='NOT' then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
hs:=read_factor(factorType, eval);
if eval then
begin
if not (ctetBoolean in factorType) then
CTEError(factorType, [ctetBoolean], 'NOT');
val(hs,l,w);
if l<>0 then
read_factor:='0'
else
read_factor:='1';
end
else
read_factor:='0'; {Just to have something}
end
else
if (m_mac in current_settings.modeswitches) and (current_scanner.preproc_pattern='TRUE') then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
read_factor:='1';
end
else
if (m_mac in current_settings.modeswitches) and (current_scanner.preproc_pattern='FALSE') then
begin
factorType:= [ctetBoolean];
preproc_consume(_ID);
read_factor:='0';
end
else
begin
hs:=preproc_substitutedtoken(factorType, eval);
{ Default is to return the original symbol }
read_factor:=hs;
if eval and (m_delphi in current_settings.modeswitches) and (ctetString in factorType) then
if searchsym(current_scanner.preproc_pattern,srsym,srsymtable) then
begin
case srsym.typ of
constsym :
begin
with tconstsym(srsym) do
begin
case consttyp of
constord :
begin
case constdef.typ of
orddef:
begin
if is_integer(constdef) then
begin
read_factor:=tostr(value.valueord);
factorType:= [ctetInteger];
end
else if is_boolean(constdef) then
begin
read_factor:=tostr(value.valueord);
factorType:= [ctetBoolean];
end
else if is_char(constdef) then
begin
read_factor:=chr(value.valueord);
factorType:= [ctetString];
end
end;
enumdef:
begin
read_factor:=tostr(value.valueord);
factorType:= [ctetInteger];
end;
end;
end;
conststring :
begin
read_factor := upper(pchar(value.valueptr));
factorType:= [ctetString];
end;
constset :
begin
hs:=',';
for l:=0 to 255 do
if l in pconstset(tconstsym(srsym).value.valueptr)^ then
hs:=hs+tostr(l)+',';
read_factor := hs;
factorType:= [ctetSet];
end;
end;
end;
end;
enumsym :
begin
read_factor:=tostr(tenumsym(srsym).value);
factorType:= [ctetInteger];
end;
end;
end;
preproc_consume(_ID);
current_scanner.skipspace;
end
end
else if current_scanner.preproc_token =_LKLAMMER then
begin
preproc_consume(_LKLAMMER);
read_factor:=read_expr(factorType, eval);
preproc_consume(_RKLAMMER);
end
else if current_scanner.preproc_token = _LECKKLAMMER then
begin
preproc_consume(_LECKKLAMMER);
read_factor := ',';
while current_scanner.preproc_token = _ID do
begin
read_factor := read_factor+read_factor(setElemType, eval)+',';
if current_scanner.preproc_token = _COMMA then
preproc_consume(_COMMA);
end;
// TODO Add check of setElemType
preproc_consume(_RECKKLAMMER);
factorType:= [ctetSet];
end
else
Message(scan_e_error_in_preproc_expr);
end;
function read_term(var termType: TCTETypeSet; eval : Boolean) : string;
var
hs1,hs2 : string;
l1,l2 : longint;
w : integer;
termType2: TCTETypeSet;
begin
hs1:=read_factor(termType, eval);
repeat
if (current_scanner.preproc_token<>_ID) then
break;
if current_scanner.preproc_pattern<>'AND' then
break;
val(hs1,l1,w);
if l1=0 then
eval:= false; {Short circuit evaluation of OR}
if eval then
begin
{Check if first expr is boolean. Must be done here, after we know
it is an AND expression.}
if not (ctetBoolean in termType) then
CTEError(termType, [ctetBoolean], 'AND');
termType:= [ctetBoolean];
end;
preproc_consume(_ID);
hs2:=read_factor(termType2, eval);
if eval then
begin
if not (ctetBoolean in termType2) then
CTEError(termType2, [ctetBoolean], 'AND');
val(hs2,l2,w);
if (l1<>0) and (l2<>0) then
hs1:='1'
else
hs1:='0';
end;
until false;
read_term:=hs1;
end;
function read_simple_expr(var simpleExprType: TCTETypeSet; eval : Boolean) : string;
var
hs1,hs2 : string;
l1,l2 : longint;
w : integer;
simpleExprType2: TCTETypeSet;
begin
hs1:=read_term(simpleExprType, eval);
repeat
if (current_scanner.preproc_token<>_ID) then
break;
if current_scanner.preproc_pattern<>'OR' then
break;
val(hs1,l1,w);
if l1<>0 then
eval:= false; {Short circuit evaluation of OR}
if eval then
begin
{Check if first expr is boolean. Must be done here, after we know
it is an OR expression.}
if not (ctetBoolean in simpleExprType) then
CTEError(simpleExprType, [ctetBoolean], 'OR');
simpleExprType:= [ctetBoolean];
end;
preproc_consume(_ID);
hs2:=read_term(simpleExprType2, eval);
if eval then
begin
if not (ctetBoolean in simpleExprType2) then
CTEError(simpleExprType2, [ctetBoolean], 'OR');
val(hs2,l2,w);
if (l1<>0) or (l2<>0) then
hs1:='1'
else
hs1:='0';
end;
until false;
read_simple_expr:=hs1;
end;
function read_expr(var exprType: TCTETypeSet; eval : Boolean) : string;
var
hs1,hs2 : string;
b : boolean;
op : ttoken;
w : integer;
l1,l2 : longint;
exprType2: TCTETypeSet;
begin
hs1:=read_simple_expr(exprType, eval);
op:=current_scanner.preproc_token;
if (op = _ID) and (current_scanner.preproc_pattern = 'IN') then
op := _IN;
if not (op in [_IN,_EQUAL,_UNEQUAL,_LT,_GT,_LTE,_GTE]) then
begin
read_expr:=hs1;
exit;
end;
if (op = _IN) then
preproc_consume(_ID)
else
preproc_consume(op);
hs2:=read_simple_expr(exprType2, eval);
if eval then
begin
if op = _IN then
begin
if exprType2 <> [ctetSet] then
CTEError(exprType2, [ctetSet], 'IN');
if exprType = [ctetSet] then
CTEError(exprType, setelementdefs, 'IN');
if is_number(hs1) and is_number(hs2) then
Message(scan_e_preproc_syntax_error)
else if hs2[1] = ',' then
b:=pos(','+hs1+',', hs2) > 0 { TODO For integer sets, perhaps check for numeric equivalence so that 0 = 00 }
else
Message(scan_e_preproc_syntax_error);
end
else
begin
if (exprType * exprType2) = [] then
CTEError(exprType2, exprType, tokeninfo^[op].str);
if is_number(hs1) and is_number(hs2) then
begin
val(hs1,l1,w);
val(hs2,l2,w);
case op of
_EQUAL :
b:=l1=l2;
_UNEQUAL :
b:=l1<>l2;
_LT :
b:=l1<l2;
_GT :
b:=l1>l2;
_GTE :
b:=l1>=l2;
_LTE :
b:=l1<=l2;
end;
end
else
begin
case op of
_EQUAL :
b:=hs1=hs2;
_UNEQUAL :
b:=hs1<>hs2;
_LT :
b:=hs1<hs2;
_GT :
b:=hs1>hs2;
_GTE :
b:=hs1>=hs2;
_LTE :
b:=hs1<=hs2;
end;
end;
end;
end
else
b:= false; {Just to have something}
if b then
read_expr:='1'
else
read_expr:='0';
exprType:= [ctetBoolean];
end;
begin
current_scanner.skipspace;
{ start preproc expression scanner }
current_scanner.preproc_token:=current_scanner.readpreproc;
parse_compiler_expr:=read_expr(compileExprType, true);
end;
function boolean_compile_time_expr(var valuedescr: String): Boolean;
var
hs : string;
exprType: TCTETypeSet;
begin
hs:=parse_compiler_expr(exprType);
if (exprType * [ctetBoolean]) = [] then
CTEError(exprType, [ctetBoolean], 'IF or ELSEIF');
boolean_compile_time_expr:= hs <> '0';
valuedescr:= hs;
end;
procedure dir_if;
begin
current_scanner.ifpreprocstack(pp_if,@boolean_compile_time_expr, scan_c_if_found);
end;
procedure dir_elseif;
begin
current_scanner.elseifpreprocstack(@boolean_compile_time_expr);
end;
procedure dir_define_impl(macstyle: boolean);
var
hs : string;
bracketcount : longint;
mac : tmacro;
macropos : longint;
macrobuffer : pmacrobuffer;
begin
current_scanner.skipspace;
hs:=current_scanner.readid;
mac:=tmacro(search_macro(hs));
if not assigned(mac) or (mac.owner <> current_module.localmacrosymtable) then
begin
mac:=tmacro.create(hs);
mac.defined:=true;
current_module.localmacrosymtable.insert(mac);
end
else
begin
mac.defined:=true;
mac.is_compiler_var:=false;
{ delete old definition }
if assigned(mac.buftext) then
begin
freemem(mac.buftext,mac.buflen);
mac.buftext:=nil;
end;
end;
Message1(parser_c_macro_defined,mac.name);
mac.is_used:=true;
if (cs_support_macro in current_settings.moduleswitches) then
begin
current_scanner.skipspace;
if not macstyle then
begin
{ may be a macro? }
if c <> ':' then
exit;
current_scanner.readchar;
if c <> '=' then
exit;
current_scanner.readchar;
current_scanner.skipspace;
end;
{ key words are never substituted }
if is_keyword(hs) then
Message(scan_e_keyword_cant_be_a_macro);
new(macrobuffer);
macropos:=0;
{ parse macro, brackets are counted so it's possible
to have a $ifdef etc. in the macro }
bracketcount:=0;
repeat
case c of
'}' :
if (bracketcount=0) then
break
else
dec(bracketcount);
'{' :
inc(bracketcount);
#10,#13 :
current_scanner.linebreak;
#26 :
current_scanner.end_of_file;
end;
macrobuffer^[macropos]:=c;
inc(macropos);
if macropos>=maxmacrolen then
Message(scan_f_macro_buffer_overflow);
current_scanner.readchar;
until false;
{ free buffer of macro ?}
if assigned(mac.buftext) then
freemem(mac.buftext,mac.buflen);
{ get new mem }
getmem(mac.buftext,macropos);
mac.buflen:=macropos;
{ copy the text }
move(macrobuffer^,mac.buftext^,macropos);
dispose(macrobuffer);
end
else
begin
{ check if there is an assignment, then we need to give a
warning }
current_scanner.skipspace;
if c=':' then
begin
current_scanner.readchar;
if c='=' then
Message(scan_w_macro_support_turned_off);
end;
end;
end;
procedure dir_define;
begin
dir_define_impl(false);
end;
procedure dir_definec;
begin
dir_define_impl(true);
end;
procedure dir_setc;
var
hs : string;
mac : tmacro;
exprType: TCTETypeSet;
l : longint;
w : integer;
begin
current_scanner.skipspace;
hs:=current_scanner.readid;
mac:=tmacro(search_macro(hs));
if not assigned(mac) or
(mac.owner <> current_module.localmacrosymtable) then
begin
mac:=tmacro.create(hs);
mac.defined:=true;
mac.is_compiler_var:=true;
current_module.localmacrosymtable.insert(mac);
end
else
begin
mac.defined:=true;
mac.is_compiler_var:=true;
{ delete old definition }
if assigned(mac.buftext) then
begin
freemem(mac.buftext,mac.buflen);
mac.buftext:=nil;
end;
end;
Message1(parser_c_macro_defined,mac.name);
mac.is_used:=true;
{ key words are never substituted }
if is_keyword(hs) then
Message(scan_e_keyword_cant_be_a_macro);
{ macro assignment can be both := and = }
current_scanner.skipspace;
if c=':' then
current_scanner.readchar;
if c='=' then
begin
current_scanner.readchar;
hs:= parse_compiler_expr(exprType);
if (exprType * [ctetBoolean, ctetInteger]) = [] then
CTEError(exprType, [ctetBoolean, ctetInteger], 'SETC');
if length(hs) <> 0 then
begin
{If we are absolutely shure it is boolean, translate
to TRUE/FALSE to increase possibility to do future type check}
if exprType = [ctetBoolean] then
begin
val(hs,l,w);
if l<>0 then
hs:='TRUE'
else
hs:='FALSE';
end;
Message2(parser_c_macro_set_to,mac.name,hs);
{ free buffer of macro ?}
if assigned(mac.buftext) then
freemem(mac.buftext,mac.buflen);
{ get new mem }
getmem(mac.buftext,length(hs));
mac.buflen:=length(hs);
{ copy the text }
move(hs[1],mac.buftext^,mac.buflen);
end
else
Message(scan_e_preproc_syntax_error);
end
else
Message(scan_e_preproc_syntax_error);
end;
procedure dir_undef;
var
hs : string;
mac : tmacro;
begin
current_scanner.skipspace;
hs:=current_scanner.readid;
mac:=tmacro(search_macro(hs));
if not assigned(mac) or
(mac.owner <> current_module.localmacrosymtable) then
begin
mac:=tmacro.create(hs);
mac.defined:=false;
current_module.localmacrosymtable.insert(mac);
end
else
begin
mac.defined:=false;
mac.is_compiler_var:=false;
{ delete old definition }
if assigned(mac.buftext) then
begin
freemem(mac.buftext,mac.buflen);
mac.buftext:=nil;
end;
end;
Message1(parser_c_macro_undefined,mac.name);
mac.is_used:=true;
end;
procedure dir_include;
function findincludefile(const path,name:TCmdStr;var foundfile:TCmdStr):boolean;
var
found : boolean;
hpath : TCmdStr;
begin
(* look for the include file
If path was specified as part of {$I } then
1. specified path (expanded with path of inputfile if relative)
else
1. path of current inputfile,current dir
2. local includepath
3. global includepath *)
found:=false;
foundfile:='';
hpath:='';
if path<>'' then
begin
if not path_absolute(path) then
hpath:=current_scanner.inputfile.path^+path
else
hpath:=path;
found:=FindFile(name, hpath,true,foundfile);
end
else
begin
hpath:=current_scanner.inputfile.path^+';'+CurDirRelPath(source_info);
found:=FindFile(name, hpath,true,foundfile);
if not found then
found:=current_module.localincludesearchpath.FindFile(name,true,foundfile);
if not found then
found:=includesearchpath.FindFile(name,true,foundfile);
end;
result:=found;
end;
var
foundfile : TCmdStr;
path,
name,
args,
hs : tpathstr;
hp : tinputfile;
found : boolean;
begin
current_scanner.skipspace;
args:=current_scanner.readcomment;
hs:=GetToken(args,' ');
if hs='' then
exit;
if (hs[1]='%') then
begin
{ case insensitive }
hs:=upper(hs);
{ remove %'s }
Delete(hs,1,1);
if hs[length(hs)]='%' then
Delete(hs,length(hs),1);
{ save old }
path:=hs;
{ first check for internal macros }
if hs='TIME' then
hs:=gettimestr
else
if hs='DATE' then
hs:=getdatestr
else
if hs='FILE' then
hs:=current_module.sourcefiles.get_file_name(current_filepos.fileindex)
else
if hs='LINE' then
hs:=tostr(current_filepos.line)
else
if hs='FPCVERSION' then
hs:=version_string
else
if hs='FPCDATE' then
hs:=date_string
else
if hs='FPCTARGET' then
hs:=target_cpu_string
else
if hs='FPCTARGETCPU' then
hs:=target_cpu_string
else
if hs='FPCTARGETOS' then
hs:=target_info.shortname
else
hs:=GetEnvironmentVariable(hs);
if hs='' then
Message1(scan_w_include_env_not_found,path);
{ make it a stringconst }
hs:=''''+hs+'''';
current_scanner.insertmacro(path,@hs[1],length(hs),
current_scanner.line_no,current_scanner.inputfile.ref_index);
end
else
begin
hs:=FixFileName(hs);
path:=ExtractFilePath(hs);
name:=ExtractFileName(hs);
{ try to find the file }
found:=findincludefile(path,name,foundfile);
if (ExtractFileExt(name)='') then
begin
{ try default extensions .inc , .pp and .pas }
if (not found) then
found:=findincludefile(path,ChangeFileExt(name,'.inc'),foundfile);
if (not found) then
found:=findincludefile(path,ChangeFileExt(name,sourceext),foundfile);
if (not found) then
found:=findincludefile(path,ChangeFileExt(name,pasext),foundfile);
end;
if current_scanner.inputfilecount<max_include_nesting then
begin
inc(current_scanner.inputfilecount);
{ we need to reread the current char }
dec(current_scanner.inputpointer);
{ shutdown current file }
current_scanner.tempcloseinputfile;
{ load new file }
hp:=do_openinputfile(foundfile);
current_scanner.addfile(hp);
current_module.sourcefiles.register_file(hp);
if (not found) then
Message1(scan_f_cannot_open_includefile,hs);
if (not current_scanner.openinputfile) then
Message1(scan_f_cannot_open_includefile,hs);
Message1(scan_t_start_include_file,current_scanner.inputfile.path^+current_scanner.inputfile.name^);
current_scanner.reload;
end
else
Message(scan_f_include_deep_ten);
end;
end;
{*****************************************************************************
Preprocessor writting
*****************************************************************************}
{$ifdef PREPROCWRITE}
constructor tpreprocfile.create(const fn:string);
begin
{ open outputfile }
assign(f,fn);
{$I-}
rewrite(f);
{$I+}
if ioresult<>0 then
Comment(V_Fatal,'can''t create file '+fn);
getmem(buf,preprocbufsize);
settextbuf(f,buf^,preprocbufsize);
{ reset }
eolfound:=false;
spacefound:=false;
end;
destructor tpreprocfile.destroy;
begin
close(f);
freemem(buf,preprocbufsize);
end;
procedure tpreprocfile.add(const s:string);
begin
write(f,s);
end;
procedure tpreprocfile.addspace;
begin
if eolfound then
begin
writeln(f,'');
eolfound:=false;
spacefound:=false;
end
else
if spacefound then
begin
write(f,' ');
spacefound:=false;
end;
end;
{$endif PREPROCWRITE}
{*****************************************************************************
TPreProcStack
*****************************************************************************}
constructor tpreprocstack.create(atyp : preproctyp;a:boolean;n:tpreprocstack);
begin
accept:=a;
typ:=atyp;
next:=n;
end;
{*****************************************************************************
TDirectiveItem
*****************************************************************************}
constructor TDirectiveItem.Create(AList:TFPHashObjectList;const n:string;p:tdirectiveproc);
begin
inherited Create(AList,n);
is_conditional:=false;
proc:=p;
end;
constructor TDirectiveItem.CreateCond(AList:TFPHashObjectList;const n:string;p:tdirectiveproc);
begin
inherited Create(AList,n);
is_conditional:=true;
proc:=p;
end;
{****************************************************************************
TSCANNERFILE
****************************************************************************}
constructor tscannerfile.create(const fn:string);
begin
inputfile:=do_openinputfile(fn);
if assigned(current_module) then
current_module.sourcefiles.register_file(inputfile);
{ reset localinput }
inputbuffer:=nil;
inputpointer:=nil;
inputstart:=0;
{ reset scanner }
preprocstack:=nil;
comment_level:=0;
yylexcount:=0;
block_type:=bt_general;
line_no:=0;
lastlinepos:=0;
lasttokenpos:=0;
lasttoken:=NOTOKEN;
nexttoken:=NOTOKEN;
lastasmgetchar:=#0;
ignoredirectives:=TFPHashList.Create;
in_asm_string:=false;
end;
procedure tscannerfile.firstfile;
begin
{ load block }
if not openinputfile then
Message1(scan_f_cannot_open_input,inputfile.name^);
reload;
end;
destructor tscannerfile.destroy;
begin
if assigned(current_module) and
(current_module.state=ms_compiled) and
(status.errorcount=0) then
checkpreprocstack
else
begin
while assigned(preprocstack) do
poppreprocstack;
end;
if not inputfile.closed then
closeinputfile;
ignoredirectives.free;
end;
function tscannerfile.openinputfile:boolean;
begin
openinputfile:=inputfile.open;
{ load buffer }
inputbuffer:=inputfile.buf;
inputpointer:=inputfile.buf;
inputstart:=inputfile.bufstart;
{ line }
line_no:=0;
lastlinepos:=0;
lasttokenpos:=0;
end;
procedure tscannerfile.closeinputfile;
begin
inputfile.close;
{ reset buffer }
inputbuffer:=nil;
inputpointer:=nil;
inputstart:=0;
{ reset line }
line_no:=0;
lastlinepos:=0;
lasttokenpos:=0;
end;
function tscannerfile.tempopeninputfile:boolean;
begin
if inputfile.is_macro then
exit;
tempopeninputfile:=inputfile.tempopen;
{ reload buffer }
inputbuffer:=inputfile.buf;
inputpointer:=inputfile.buf;
inputstart:=inputfile.bufstart;
end;
procedure tscannerfile.tempcloseinputfile;
begin
if inputfile.closed or inputfile.is_macro then
exit;
inputfile.setpos(inputstart+(inputpointer-inputbuffer));
inputfile.tempclose;
{ reset buffer }
inputbuffer:=nil;
inputpointer:=nil;
inputstart:=0;
end;
procedure tscannerfile.saveinputfile;
begin
inputfile.saveinputpointer:=inputpointer;
inputfile.savelastlinepos:=lastlinepos;
inputfile.saveline_no:=line_no;
end;
procedure tscannerfile.restoreinputfile;
begin
inputbuffer:=inputfile.buf;
inputpointer:=inputfile.saveinputpointer;
lastlinepos:=inputfile.savelastlinepos;
line_no:=inputfile.saveline_no;
if not inputfile.is_macro then
parser_current_file:=inputfile.name^;
end;
procedure tscannerfile.nextfile;
var
to_dispose : tinputfile;
begin
if assigned(inputfile.next) then
begin
if inputfile.is_macro then
to_dispose:=inputfile
else
begin
to_dispose:=nil;
dec(inputfilecount);
end;
{ we can allways close the file, no ? }
inputfile.close;
inputfile:=inputfile.next;
if assigned(to_dispose) then
to_dispose.free;
restoreinputfile;
end;
end;
procedure tscannerfile.startrecordtokens(buf:tdynamicarray);
begin
if not assigned(buf) then
internalerror(200511172);
if assigned(recordtokenbuf) then
internalerror(200511173);
recordtokenbuf:=buf;
fillchar(last_settings,sizeof(last_settings),0);
fillchar(last_filepos,sizeof(last_filepos),0);
end;
procedure tscannerfile.stoprecordtokens;
begin
if not assigned(recordtokenbuf) then
internalerror(200511174);
recordtokenbuf:=nil;
end;
procedure tscannerfile.recordtoken;
begin
if not assigned(recordtokenbuf) then
internalerror(200511176);
{ settings changed? }
if CompareByte(current_settings,last_settings,sizeof(current_settings))<>0 then
begin
{ use a special token to record it }
recordtokenbuf.write(_GENERICSPECIALTOKEN,1);
recordtokenbuf.write(ST_LOADSETTINGS,1);
recordtokenbuf.write(current_settings,sizeof(current_settings));
last_settings:=current_settings;
end;
{ file pos changes? }
if current_tokenpos.line<>last_filepos.line then
begin
recordtokenbuf.write(_GENERICSPECIALTOKEN,1);
recordtokenbuf.write(ST_LINE,1);
recordtokenbuf.write(current_tokenpos.line,sizeof(current_tokenpos.line));
last_filepos.line:=current_tokenpos.line;
end;
if current_tokenpos.column<>last_filepos.column then
begin
recordtokenbuf.write(_GENERICSPECIALTOKEN,1);
recordtokenbuf.write(ST_COLUMN,1);
recordtokenbuf.write(current_tokenpos.column,sizeof(current_tokenpos.column));
last_filepos.column:=current_tokenpos.column;
end;
if current_tokenpos.fileindex<>last_filepos.fileindex then
begin
recordtokenbuf.write(_GENERICSPECIALTOKEN,1);
recordtokenbuf.write(ST_FILEINDEX,1);
recordtokenbuf.write(current_tokenpos.fileindex,sizeof(current_tokenpos.fileindex));
last_filepos.fileindex:=current_tokenpos.fileindex;
end;
recordtokenbuf.write(token,1);
if token=_ID then
recordtokenbuf.write(idtoken,1);
case token of
_CWCHAR,
_CWSTRING :
begin
recordtokenbuf.write(patternw^.len,sizeof(sizeint));
recordtokenbuf.write(patternw^.data^,patternw^.len*sizeof(tcompilerwidechar));
end;
_CCHAR,
_CSTRING,
_INTCONST,
_REALNUMBER :
begin
recordtokenbuf.write(pattern[0],1);
recordtokenbuf.write(pattern[1],length(pattern));
end;
_ID :
begin
recordtokenbuf.write(orgpattern[0],1);
recordtokenbuf.write(orgpattern[1],length(orgpattern));
end;
end;
end;
procedure tscannerfile.startreplaytokens(buf:tdynamicarray);
begin
if not assigned(buf) then
internalerror(200511175);
{ save current token }
if token in [_CWCHAR,_CWSTRING,_CCHAR,_CSTRING,_INTCONST,_REALNUMBER,_ID] then
internalerror(200511178);
replaysavetoken:=token;
old_settings:=current_settings;
if assigned(inputpointer) then
dec(inputpointer);
{ install buffer }
replaytokenbuf:=buf;
{ reload next token }
replaytokenbuf.seek(0);
replaytoken;
end;
procedure tscannerfile.replaytoken;
var
wlen : sizeint;
specialtoken : tspecialgenerictoken;
begin
if not assigned(replaytokenbuf) then
internalerror(200511177);
{ End of replay buffer? Then load the next char from the file again }
if replaytokenbuf.pos>=replaytokenbuf.size then
begin
replaytokenbuf:=nil;
if assigned(inputpointer) then
begin
c:=inputpointer^;
inc(inputpointer);
end;
token:=replaysavetoken;
{ restore compiler settings }
current_settings:=old_settings;
exit;
end;
repeat
{ load token from the buffer }
replaytokenbuf.read(token,1);
if token=_ID then
replaytokenbuf.read(idtoken,1)
else
idtoken:=_NOID;
case token of
_CWCHAR,
_CWSTRING :
begin
replaytokenbuf.read(wlen,sizeof(SizeInt));
setlengthwidestring(patternw,wlen);
replaytokenbuf.read(patternw^.data^,patternw^.len*sizeof(tcompilerwidechar));
pattern:='';
end;
_CCHAR,
_CSTRING,
_INTCONST,
_REALNUMBER :
begin
replaytokenbuf.read(pattern[0],1);
replaytokenbuf.read(pattern[1],length(pattern));
orgpattern:='';
end;
_ID :
begin
replaytokenbuf.read(orgpattern[0],1);
replaytokenbuf.read(orgpattern[1],length(orgpattern));
pattern:=upper(orgpattern);
end;
_GENERICSPECIALTOKEN:
begin
replaytokenbuf.read(specialtoken,1);
case specialtoken of
ST_LOADSETTINGS:
replaytokenbuf.read(current_settings,sizeof(current_settings));
ST_LINE:
begin
replaytokenbuf.read(current_tokenpos.line,sizeof(current_tokenpos.line));
current_filepos:=current_tokenpos;
end;
ST_COLUMN:
begin
replaytokenbuf.read(current_tokenpos.column,sizeof(current_tokenpos.column));
current_filepos:=current_tokenpos;
end;
ST_FILEINDEX:
begin
replaytokenbuf.read(current_tokenpos.fileindex,sizeof(current_tokenpos.fileindex));
current_filepos:=current_tokenpos;
end;
else
internalerror(2006103010);
end;
continue;
end;
end;
break;
until false;
end;
procedure tscannerfile.addfile(hp:tinputfile);
begin
saveinputfile;
{ add to list }
hp.next:=inputfile;
inputfile:=hp;
{ load new inputfile }
restoreinputfile;
end;
procedure tscannerfile.reload;
begin
with inputfile do
begin
{ when nothing more to read then leave immediatly, so we
don't change the current_filepos and leave it point to the last
char }
if (c=#26) and (not assigned(next)) then
exit;
repeat
{ still more to read?, then change the #0 to a space so its seen
as a seperator, this can't be used for macro's which can change
the place of the #0 in the buffer with tempopen }
if (c=#0) and (bufsize>0) and
not(inputfile.is_macro) and
(inputpointer-inputbuffer<bufsize) then
begin
c:=' ';
inc(inputpointer);
exit;
end;
{ can we read more from this file ? }
if (c<>#26) and (not endoffile) then
begin
readbuf;
inputpointer:=buf;
inputbuffer:=buf;
inputstart:=bufstart;
{ first line? }
if line_no=0 then
begin
c:=inputpointer^;
{ eat utf-8 signature? }
if (ord(inputpointer^)=$ef) and
(ord((inputpointer+1)^)=$bb) and
(ord((inputpointer+2)^)=$bf) then
begin
inc(inputpointer,3);
message(scan_c_switching_to_utf8);
current_settings.sourcecodepage:='utf8';
end;
line_no:=1;
if cs_asm_source in current_settings.globalswitches then
inputfile.setline(line_no,bufstart);
end;
end
else
begin
{ load eof position in tokenpos/current_filepos }
gettokenpos;
{ close file }
closeinputfile;
{ no next module, than EOF }
if not assigned(inputfile.next) then
begin
c:=#26;
exit;
end;
{ load next file and reopen it }
nextfile;
tempopeninputfile;
{ status }
Message1(scan_t_back_in,inputfile.name^);
end;
{ load next char }
c:=inputpointer^;
inc(inputpointer);
until c<>#0; { if also end, then reload again }
end;
end;
procedure tscannerfile.insertmacro(const macname:string;p:pchar;len,line,fileindex:longint);
var
hp : tinputfile;
begin
{ save old postion }
dec(inputpointer);
tempcloseinputfile;
{ create macro 'file' }
{ use special name to dispose after !! }
hp:=do_openinputfile('_Macro_.'+macname);
addfile(hp);
with inputfile do
begin
setmacro(p,len);
{ local buffer }
inputbuffer:=buf;
inputpointer:=buf;
inputstart:=bufstart;
ref_index:=fileindex;
end;
{ reset line }
line_no:=line;
lastlinepos:=0;
lasttokenpos:=0;
{ load new c }
c:=inputpointer^;
inc(inputpointer);
end;
procedure tscannerfile.gettokenpos;
{ load the values of tokenpos and lasttokenpos }
begin
lasttokenpos:=inputstart+(inputpointer-inputbuffer);
current_tokenpos.line:=line_no;
current_tokenpos.column:=lasttokenpos-lastlinepos;
current_tokenpos.fileindex:=inputfile.ref_index;
current_tokenpos.moduleindex:=current_module.unit_index;
current_filepos:=current_tokenpos;
end;
procedure tscannerfile.inc_comment_level;
var
oldcurrent_filepos : tfileposinfo;
begin
if (m_nested_comment in current_settings.modeswitches) then
inc(comment_level)
else
comment_level:=1;
if (comment_level>1) then
begin
oldcurrent_filepos:=current_filepos;
gettokenpos; { update for warning }
Message1(scan_w_comment_level,tostr(comment_level));
current_filepos:=oldcurrent_filepos;
end;
end;
procedure tscannerfile.dec_comment_level;
begin
if (m_nested_comment in current_settings.modeswitches) then
dec(comment_level)
else
comment_level:=0;
end;
procedure tscannerfile.linebreak;
var
cur : char;
oldtokenpos,
oldcurrent_filepos : tfileposinfo;
begin
with inputfile do
begin
if (byte(inputpointer^)=0) and not(endoffile) then
begin
cur:=c;
reload;
if byte(cur)+byte(c)<>23 then
dec(inputpointer);
end
else
begin
{ Support all combination of #10 and #13 as line break }
if (byte(inputpointer^)+byte(c)=23) then
inc(inputpointer);
end;
{ Always return #10 as line break }
c:=#10;
{ increase line counters }
lastlinepos:=bufstart+(inputpointer-inputbuffer);
inc(line_no);
{ update linebuffer }
if cs_asm_source in current_settings.globalswitches then
inputfile.setline(line_no,lastlinepos);
{ update for status and call the show status routine,
but don't touch current_filepos ! }
oldcurrent_filepos:=current_filepos;
oldtokenpos:=current_tokenpos;
gettokenpos; { update for v_status }
inc(status.compiledlines);
ShowStatus;
current_filepos:=oldcurrent_filepos;
current_tokenpos:=oldtokenpos;
end;
end;
procedure tscannerfile.illegal_char(c:char);
var
s : string;
begin
if c in [#32..#255] then
s:=''''+c+''''
else
s:='#'+tostr(ord(c));
Message2(scan_f_illegal_char,s,'$'+hexstr(ord(c),2));
end;
procedure tscannerfile.end_of_file;
begin
checkpreprocstack;
Message(scan_f_end_of_file);
end;
{-------------------------------------------
IF Conditional Handling
-------------------------------------------}
procedure tscannerfile.checkpreprocstack;
begin
{ check for missing ifdefs }
while assigned(preprocstack) do
begin
Message4(scan_e_endif_expected,preprocstring[preprocstack.typ],preprocstack.name,
preprocstack.owner.inputfile.name^,tostr(preprocstack.line_nb));
poppreprocstack;
end;
end;
procedure tscannerfile.poppreprocstack;
var
hp : tpreprocstack;
begin
if assigned(preprocstack) then
begin
Message1(scan_c_endif_found,preprocstack.name);
hp:=preprocstack.next;
preprocstack.free;
preprocstack:=hp;
end
else
Message(scan_e_endif_without_if);
end;
procedure tscannerfile.ifpreprocstack(atyp : preproctyp;compile_time_predicate:tcompile_time_predicate;messid:longint);
var
condition: Boolean;
valuedescr: String;
begin
if (preprocstack=nil) or preprocstack.accept then
condition:= compile_time_predicate(valuedescr)
else
begin
condition:= false;
valuedescr:= '';
end;
preprocstack:=tpreprocstack.create(atyp, condition, preprocstack);
preprocstack.name:=valuedescr;
preprocstack.line_nb:=line_no;
preprocstack.owner:=self;
if preprocstack.accept then
Message2(messid,preprocstack.name,'accepted')
else
Message2(messid,preprocstack.name,'rejected');
end;
procedure tscannerfile.elsepreprocstack;
begin
if assigned(preprocstack) and
(preprocstack.typ<>pp_else) then
begin
if (preprocstack.typ=pp_elseif) then
preprocstack.accept:=false
else
if (not(assigned(preprocstack.next)) or (preprocstack.next.accept)) then
preprocstack.accept:=not preprocstack.accept;
preprocstack.typ:=pp_else;
preprocstack.line_nb:=line_no;
if preprocstack.accept then
Message2(scan_c_else_found,preprocstack.name,'accepted')
else
Message2(scan_c_else_found,preprocstack.name,'rejected');
end
else
Message(scan_e_endif_without_if);
end;
procedure tscannerfile.elseifpreprocstack(compile_time_predicate:tcompile_time_predicate);
var
valuedescr: String;
begin
if assigned(preprocstack) and
(preprocstack.typ in [pp_if,pp_elseif]) then
begin
{ when the branch is accepted we use pp_elseif so we know that
all the next branches need to be rejected. when this branch is still
not accepted then leave it at pp_if }
if (preprocstack.typ=pp_elseif) then
preprocstack.accept:=false
else if (preprocstack.typ=pp_if) and preprocstack.accept then
begin
preprocstack.accept:=false;
preprocstack.typ:=pp_elseif;
end
else if (not(assigned(preprocstack.next)) or (preprocstack.next.accept))
and compile_time_predicate(valuedescr) then
begin
preprocstack.name:=valuedescr;
preprocstack.accept:=true;
preprocstack.typ:=pp_elseif;
end;
preprocstack.line_nb:=line_no;
if preprocstack.accept then
Message2(scan_c_else_found,preprocstack.name,'accepted')
else
Message2(scan_c_else_found,preprocstack.name,'rejected');
end
else
Message(scan_e_endif_without_if);
end;
procedure tscannerfile.handleconditional(p:tdirectiveitem);
var
oldcurrent_filepos : tfileposinfo;
begin
oldcurrent_filepos:=current_filepos;
repeat
current_scanner.gettokenpos;
p.proc();
{ accept the text ? }
if (current_scanner.preprocstack=nil) or current_scanner.preprocstack.accept then
break
else
begin
current_scanner.gettokenpos;
Message(scan_c_skipping_until);
repeat
current_scanner.skipuntildirective;
if not (m_mac in current_settings.modeswitches) then
p:=tdirectiveitem(turbo_scannerdirectives.Find(current_scanner.readid))
else
p:=tdirectiveitem(mac_scannerdirectives.Find(current_scanner.readid));
until assigned(p) and (p.is_conditional);
current_scanner.gettokenpos;
Message1(scan_d_handling_switch,'$'+p.name);
end;
until false;
current_filepos:=oldcurrent_filepos;
end;
procedure tscannerfile.handledirectives;
var
t : tdirectiveitem;
hs : string;
begin
gettokenpos;
readchar; {Remove the $}
hs:=readid;
{ handle empty directive }
if hs='' then
begin
Message1(scan_w_illegal_switch,'$');
exit;
end;
{$ifdef PREPROCWRITE}
if parapreprocess then
begin
t:=Get_Directive(hs);
if not(is_conditional(t) or (t=_DIR_DEFINE) or (t=_DIR_UNDEF)) then
begin
preprocfile^.AddSpace;
preprocfile^.Add('{$'+hs+current_scanner.readcomment+'}');
exit;
end;
end;
{$endif PREPROCWRITE}
{ skip this directive? }
if (ignoredirectives.find(hs)<>nil) then
begin
if (comment_level>0) then
readcomment;
{ we've read the whole comment }
aktcommentstyle:=comment_none;
exit;
end;
{ Check for compiler switches }
while (length(hs)=1) and (c in ['-','+']) do
begin
HandleSwitch(hs[1],c);
current_scanner.readchar; {Remove + or -}
if c=',' then
begin
current_scanner.readchar; {Remove , }
{ read next switch, support $v+,$+}
hs:=current_scanner.readid;
if (hs='') then
begin
if (c='$') and (m_fpc in current_settings.modeswitches) then
begin
current_scanner.readchar; { skip $ }
hs:=current_scanner.readid;
end;
if (hs='') then
Message1(scan_w_illegal_directive,'$'+c);
end
else
Message1(scan_d_handling_switch,'$'+hs);
end
else
hs:='';
end;
{ directives may follow switches after a , }
if hs<>'' then
begin
if not (m_mac in current_settings.modeswitches) then
t:=tdirectiveitem(turbo_scannerdirectives.Find(hs))
else
t:=tdirectiveitem(mac_scannerdirectives.Find(hs));
if assigned(t) then
begin
if t.is_conditional then
handleconditional(t)
else
begin
Message1(scan_d_handling_switch,'$'+hs);
t.proc();
end;
end
else
begin
current_scanner.ignoredirectives.Add(hs,nil);
Message1(scan_w_illegal_directive,'$'+hs);
end;
{ conditionals already read the comment }
if (current_scanner.comment_level>0) then
current_scanner.readcomment;
{ we've read the whole comment }
aktcommentstyle:=comment_none;
end;
end;
procedure tscannerfile.readchar;
begin
c:=inputpointer^;
if c=#0 then
reload
else
inc(inputpointer);
end;
procedure tscannerfile.readstring;
var
i : longint;
err : boolean;
begin
err:=false;
i:=0;
repeat
case c of
'_',
'0'..'9',
'A'..'Z' :
begin
if i<255 then
begin
inc(i);
orgpattern[i]:=c;
pattern[i]:=c;
end
else
begin
if not err then
begin
Message(scan_e_string_exceeds_255_chars);
err:=true;
end;
end;
c:=inputpointer^;
inc(inputpointer);
end;
'a'..'z' :
begin
if i<255 then
begin
inc(i);
orgpattern[i]:=c;
pattern[i]:=chr(ord(c)-32)
end
else
begin
if not err then
begin
Message(scan_e_string_exceeds_255_chars);
err:=true;
end;
end;
c:=inputpointer^;
inc(inputpointer);
end;
#0 :
reload;
else
break;
end;
until false;
orgpattern[0]:=chr(i);
pattern[0]:=chr(i);
end;
procedure tscannerfile.readnumber;
var
base,
i : longint;
begin
case c of
'%' :
begin
readchar;
base:=2;
pattern[1]:='%';
i:=1;
end;
'&' :
begin
readchar;
base:=8;
pattern[1]:='&';
i:=1;
end;
'$' :
begin
readchar;
base:=16;
pattern[1]:='$';
i:=1;
end;
else
begin
base:=10;
i:=0;
end;
end;
while ((base>=10) and (c in ['0'..'9'])) or
((base=16) and (c in ['A'..'F','a'..'f'])) or
((base=8) and (c in ['0'..'7'])) or
((base=2) and (c in ['0'..'1'])) do
begin
if i<255 then
begin
inc(i);
pattern[i]:=c;
end;
readchar;
end;
pattern[0]:=chr(i);
end;
function tscannerfile.readid:string;
begin
readstring;
readid:=pattern;
end;
function tscannerfile.readval:longint;
var
l : longint;
w : integer;
begin
readnumber;
val(pattern,l,w);
readval:=l;
end;
function tscannerfile.readval_asstring:string;
begin
readnumber;
readval_asstring:=pattern;
end;
function tscannerfile.readcomment:string;
var
i : longint;
begin
i:=0;
repeat
case c of
'{' :
begin
if aktcommentstyle=comment_tp then
inc_comment_level;
end;
'}' :
begin
if aktcommentstyle=comment_tp then
begin
readchar;
dec_comment_level;
if comment_level=0 then
break
else
continue;
end;
end;
'*' :
begin
if aktcommentstyle=comment_oldtp then
begin
readchar;
if c=')' then
begin
readchar;
dec_comment_level;
break;
end
else
{ Add both characters !!}
if (i<255) then
begin
inc(i);
readcomment[i]:='*';
if (i<255) then
begin
inc(i);
readcomment[i]:=c;
end;
end;
end
else
{ Not old TP comment, so add...}
begin
if (i<255) then
begin
inc(i);
readcomment[i]:='*';
end;
end;
end;
#10,#13 :
linebreak;
#26 :
end_of_file;
else
begin
if (i<255) then
begin
inc(i);
readcomment[i]:=c;
end;
end;
end;
readchar;
until false;
readcomment[0]:=chr(i);
end;
function tscannerfile.readquotedstring:string;
var
i : longint;
msgwritten : boolean;
begin
i:=0;
msgwritten:=false;
if (c='''') then
begin
repeat
readchar;
case c of
#26 :
end_of_file;
#10,#13 :
Message(scan_f_string_exceeds_line);
'''' :
begin
readchar;
if c<>'''' then
break;
end;
end;
if i<255 then
begin
inc(i);
result[i]:=c;
end
else
begin
if not msgwritten then
begin
Message(scan_e_string_exceeds_255_chars);
msgwritten:=true;
end;
end;
until false;
end;
result[0]:=chr(i);
end;
function tscannerfile.readstate:char;
var
state : char;
begin
state:=' ';
if c=' ' then
begin
current_scanner.skipspace;
current_scanner.readid;
if pattern='ON' then
state:='+'
else
if pattern='OFF' then
state:='-';
end
else
state:=c;
if not (state in ['+','-']) then
Message(scan_e_wrong_switch_toggle);
readstate:=state;
end;
function tscannerfile.readstatedefault:char;
var
state : char;
begin
state:=' ';
if c=' ' then
begin
current_scanner.skipspace;
current_scanner.readid;
if pattern='ON' then
state:='+'
else
if pattern='OFF' then
state:='-'
else
if pattern='DEFAULT' then
state:='*';
end
else
state:=c;
if not (state in ['+','-','*']) then
Message(scan_e_wrong_switch_toggle_default);
readstatedefault:=state;
end;
procedure tscannerfile.skipspace;
begin
repeat
case c of
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
break;
continue;
end;
#10,
#13 :
linebreak;
#9,#11,#12,' ' :
;
else
break;
end;
readchar;
until false;
end;
procedure tscannerfile.skipuntildirective;
var
found : longint;
next_char_loaded : boolean;
begin
found:=0;
next_char_loaded:=false;
repeat
case c of
#10,
#13 :
linebreak;
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
end_of_file;
continue;
end;
'{' :
begin
if (aktcommentstyle in [comment_tp,comment_none]) then
begin
aktcommentstyle:=comment_tp;
if (comment_level=0) then
found:=1;
inc_comment_level;
end;
end;
'*' :
begin
if (aktcommentstyle=comment_oldtp) then
begin
readchar;
if c=')' then
begin
dec_comment_level;
found:=0;
aktcommentstyle:=comment_none;
end
else
next_char_loaded:=true;
end
else
found := 0;
end;
'}' :
begin
if (aktcommentstyle=comment_tp) then
begin
dec_comment_level;
if (comment_level=0) then
aktcommentstyle:=comment_none;
found:=0;
end;
end;
'$' :
begin
if found=1 then
found:=2;
end;
'''' :
if (aktcommentstyle=comment_none) then
begin
repeat
readchar;
case c of
#26 :
end_of_file;
#10,#13 :
break;
'''' :
begin
readchar;
if c<>'''' then
begin
next_char_loaded:=true;
break;
end;
end;
end;
until false;
end;
'(' :
begin
if (aktcommentstyle=comment_none) then
begin
readchar;
if c='*' then
begin
readchar;
if c='$' then
begin
found:=2;
inc_comment_level;
aktcommentstyle:=comment_oldtp;
end
else
begin
skipoldtpcomment;
next_char_loaded:=true;
end;
end
else
next_char_loaded:=true;
end
else
found:=0;
end;
'/' :
begin
if (aktcommentstyle=comment_none) then
begin
readchar;
if c='/' then
skipdelphicomment;
next_char_loaded:=true;
end
else
found:=0;
end;
else
found:=0;
end;
if next_char_loaded then
next_char_loaded:=false
else
readchar;
until (found=2);
end;
{****************************************************************************
Comment Handling
****************************************************************************}
procedure tscannerfile.skipcomment;
begin
aktcommentstyle:=comment_tp;
readchar;
inc_comment_level;
{ handle compiler switches }
if (c='$') then
handledirectives;
{ handle_switches can dec comment_level, }
while (comment_level>0) do
begin
case c of
'{' :
inc_comment_level;
'}' :
dec_comment_level;
#10,#13 :
linebreak;
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
end_of_file;
continue;
end;
end;
readchar;
end;
aktcommentstyle:=comment_none;
end;
procedure tscannerfile.skipdelphicomment;
begin
aktcommentstyle:=comment_delphi;
inc_comment_level;
readchar;
{ this is not supported }
if c='$' then
Message(scan_w_wrong_styled_switch);
{ skip comment }
while not (c in [#10,#13,#26]) do
readchar;
dec_comment_level;
aktcommentstyle:=comment_none;
end;
procedure tscannerfile.skipoldtpcomment;
var
found : longint;
begin
aktcommentstyle:=comment_oldtp;
inc_comment_level;
{ only load a char if last already processed,
was cause of bug1634 PM }
if c=#0 then
readchar;
{ this is now supported }
if (c='$') then
handledirectives;
{ skip comment }
while (comment_level>0) do
begin
found:=0;
repeat
case c of
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
end_of_file;
continue;
end;
#10,#13 :
linebreak;
'*' :
begin
if found=3 then
found:=4
else
found:=1;
end;
')' :
begin
if found in [1,4] then
begin
dec_comment_level;
if comment_level=0 then
found:=2
else
found:=0;
end;
end;
'(' :
begin
if found=4 then
inc_comment_level;
found:=3;
end;
else
begin
if found=4 then
inc_comment_level;
found:=0;
end;
end;
readchar;
until (found=2);
end;
aktcommentstyle:=comment_none;
end;
{****************************************************************************
Token Scanner
****************************************************************************}
procedure tscannerfile.readtoken(allowrecordtoken:boolean);
var
code : integer;
len,
low,high,mid : longint;
w : word;
m : longint;
mac : tmacro;
asciinr : string[6];
msgwritten,
iswidestring : boolean;
label
exit_label;
begin
if localswitcheschanged then
begin
current_settings.localswitches:=nextlocalswitches;
localswitcheschanged:=false;
end;
{ record tokens? }
if allowrecordtoken and
assigned(recordtokenbuf) then
recordtoken;
{ replay tokens? }
if assigned(replaytokenbuf) then
begin
replaytoken;
goto exit_label;
end;
{ was there already a token read, then return that token }
if nexttoken<>NOTOKEN then
begin
token:=nexttoken;
nexttoken:=NOTOKEN;
goto exit_label;
end;
{ Skip all spaces and comments }
repeat
case c of
'{' :
skipcomment;
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
break;
end;
' ',#9..#13 :
begin
{$ifdef PREPROCWRITE}
if parapreprocess then
begin
if c=#10 then
preprocfile.eolfound:=true
else
preprocfile.spacefound:=true;
end;
{$endif PREPROCWRITE}
skipspace;
end
else
break;
end;
until false;
{ Save current token position, for EOF its already loaded }
if c<>#26 then
gettokenpos;
{ Check first for a identifier/keyword, this is 20+% faster (PFV) }
if c in ['A'..'Z','a'..'z','_'] then
begin
readstring;
token:=_ID;
idtoken:=_ID;
{ keyword or any other known token,
pattern is always uppercased }
if (pattern[1]<>'_') and (length(pattern) in [tokenlenmin..tokenlenmax]) then
begin
low:=ord(tokenidx^[length(pattern),pattern[1]].first);
high:=ord(tokenidx^[length(pattern),pattern[1]].last);
while low<high do
begin
mid:=(high+low+1) shr 1;
if pattern<tokeninfo^[ttoken(mid)].str then
high:=mid-1
else
low:=mid;
end;
with tokeninfo^[ttoken(high)] do
if pattern=str then
begin
if keyword in current_settings.modeswitches then
if op=NOTOKEN then
token:=ttoken(high)
else
token:=op;
idtoken:=ttoken(high);
end;
end;
{ Only process identifiers and not keywords }
if token=_ID then
begin
{ this takes some time ... }
if (cs_support_macro in current_settings.moduleswitches) then
begin
mac:=tmacro(search_macro(pattern));
if assigned(mac) and (not mac.is_compiler_var) and (assigned(mac.buftext)) then
begin
if yylexcount<max_macro_nesting then
begin
mac.is_used:=true;
inc(yylexcount);
insertmacro(pattern,mac.buftext,mac.buflen,
mac.fileinfo.line,mac.fileinfo.fileindex);
{ handle empty macros }
if c=#0 then
reload;
readtoken(false);
{ that's all folks }
dec(yylexcount);
exit;
end
else
Message(scan_w_macro_too_deep);
end;
end;
end;
{ return token }
goto exit_label;
end
else
begin
idtoken:=_NOID;
case c of
'$' :
begin
readnumber;
token:=_INTCONST;
goto exit_label;
end;
'%' :
begin
if not(m_fpc in current_settings.modeswitches) then
Illegal_Char(c)
else
begin
readnumber;
token:=_INTCONST;
goto exit_label;
end;
end;
'&' :
begin
if m_fpc in current_settings.modeswitches then
begin
readnumber;
token:=_INTCONST;
goto exit_label;
end
else if m_mac in current_settings.modeswitches then
begin
readchar;
token:=_AMPERSAND;
goto exit_label;
end
else
Illegal_Char(c);
end;
'0'..'9' :
begin
readnumber;
if (c in ['.','e','E']) then
begin
{ first check for a . }
if c='.' then
begin
readchar;
{ is it a .. from a range? }
case c of
'.' :
begin
readchar;
token:=_INTCONST;
nexttoken:=_POINTPOINT;
goto exit_label;
end;
')' :
begin
readchar;
token:=_INTCONST;
nexttoken:=_RECKKLAMMER;
goto exit_label;
end;
end;
{ insert the number after the . }
pattern:=pattern+'.';
while c in ['0'..'9'] do
begin
pattern:=pattern+c;
readchar;
end;
end;
{ E can also follow after a point is scanned }
if c in ['e','E'] then
begin
pattern:=pattern+'E';
readchar;
if c in ['-','+'] then
begin
pattern:=pattern+c;
readchar;
end;
if not(c in ['0'..'9']) then
Illegal_Char(c);
while c in ['0'..'9'] do
begin
pattern:=pattern+c;
readchar;
end;
end;
token:=_REALNUMBER;
goto exit_label;
end;
token:=_INTCONST;
goto exit_label;
end;
';' :
begin
readchar;
token:=_SEMICOLON;
goto exit_label;
end;
'[' :
begin
readchar;
token:=_LECKKLAMMER;
goto exit_label;
end;
']' :
begin
readchar;
token:=_RECKKLAMMER;
goto exit_label;
end;
'(' :
begin
readchar;
case c of
'*' :
begin
c:=#0;{Signal skipoldtpcomment to reload a char }
skipoldtpcomment;
readtoken(false);
exit;
end;
'.' :
begin
readchar;
token:=_LECKKLAMMER;
goto exit_label;
end;
end;
token:=_LKLAMMER;
goto exit_label;
end;
')' :
begin
readchar;
token:=_RKLAMMER;
goto exit_label;
end;
'+' :
begin
readchar;
if (c='=') and (cs_support_c_operators in current_settings.moduleswitches) then
begin
readchar;
token:=_PLUSASN;
goto exit_label;
end;
token:=_PLUS;
goto exit_label;
end;
'-' :
begin
readchar;
if (c='=') and (cs_support_c_operators in current_settings.moduleswitches) then
begin
readchar;
token:=_MINUSASN;
goto exit_label;
end;
token:=_MINUS;
goto exit_label;
end;
':' :
begin
readchar;
if c='=' then
begin
readchar;
token:=_ASSIGNMENT;
goto exit_label;
end;
token:=_COLON;
goto exit_label;
end;
'*' :
begin
readchar;
if (c='=') and (cs_support_c_operators in current_settings.moduleswitches) then
begin
readchar;
token:=_STARASN;
end
else
if c='*' then
begin
readchar;
token:=_STARSTAR;
end
else
token:=_STAR;
goto exit_label;
end;
'/' :
begin
readchar;
case c of
'=' :
begin
if (cs_support_c_operators in current_settings.moduleswitches) then
begin
readchar;
token:=_SLASHASN;
goto exit_label;
end;
end;
'/' :
begin
skipdelphicomment;
readtoken(false);
exit;
end;
end;
token:=_SLASH;
goto exit_label;
end;
'|' :
if m_mac in current_settings.modeswitches then
begin
readchar;
token:=_PIPE;
goto exit_label;
end
else
Illegal_Char(c);
'=' :
begin
readchar;
token:=_EQUAL;
goto exit_label;
end;
'.' :
begin
readchar;
case c of
'.' :
begin
readchar;
case c of
'.' :
begin
readchar;
token:=_POINTPOINTPOINT;
goto exit_label;
end;
else
begin
token:=_POINTPOINT;
goto exit_label;
end;
end;
end;
')' :
begin
readchar;
token:=_RECKKLAMMER;
goto exit_label;
end;
end;
token:=_POINT;
goto exit_label;
end;
'@' :
begin
readchar;
token:=_KLAMMERAFFE;
goto exit_label;
end;
',' :
begin
readchar;
token:=_COMMA;
goto exit_label;
end;
'''','#','^' :
begin
len:=0;
msgwritten:=false;
pattern:='';
iswidestring:=false;
if c='^' then
begin
readchar;
c:=upcase(c);
if (block_type in [bt_type,bt_specialize]) or
(lasttoken=_ID) or (lasttoken=_NIL) or
(lasttoken=_RKLAMMER) or (lasttoken=_RECKKLAMMER) or (lasttoken=_CARET) then
begin
token:=_CARET;
goto exit_label;
end
else
begin
inc(len);
if c<#64 then
pattern[len]:=chr(ord(c)+64)
else
pattern[len]:=chr(ord(c)-64);
readchar;
end;
end;
repeat
case c of
'#' :
begin
readchar; { read # }
if c='$' then
begin
readchar; { read leading $ }
asciinr:='$';
while (upcase(c) in ['A'..'F','0'..'9']) and (length(asciinr)<6) do
begin
asciinr:=asciinr+c;
readchar;
end;
end
else
begin
asciinr:='';
while (c in ['0'..'9']) and (length(asciinr)<6) do
begin
asciinr:=asciinr+c;
readchar;
end;
end;
val(asciinr,m,code);
if (asciinr='') or (code<>0) then
Message(scan_e_illegal_char_const)
else if (m<0) or (m>255) or (length(asciinr)>3) then
begin
if (m>=0) and (m<=65535) then
begin
if not iswidestring then
begin
ascii2unicode(@pattern[1],len,patternw);
iswidestring:=true;
len:=0;
end;
concatwidestringchar(patternw,tcompilerwidechar(m));
end
else
Message(scan_e_illegal_char_const)
end
else if iswidestring then
concatwidestringchar(patternw,asciichar2unicode(char(m)))
else
begin
if len<255 then
begin
inc(len);
pattern[len]:=chr(m);
end
else
begin
if not msgwritten then
begin
Message(scan_e_string_exceeds_255_chars);
msgwritten:=true;
end;
end;
end;
end;
'''' :
begin
repeat
readchar;
case c of
#26 :
end_of_file;
#10,#13 :
Message(scan_f_string_exceeds_line);
'''' :
begin
readchar;
if c<>'''' then
break;
end;
end;
{ interpret as utf-8 string? }
if (ord(c)>=$80) and (current_settings.sourcecodepage='utf8') then
begin
{ convert existing string to an utf-8 string }
if not iswidestring then
begin
ascii2unicode(@pattern[1],len,patternw);
iswidestring:=true;
len:=0;
end;
{ four or more chars aren't handled }
if (ord(c) and $f0)=$f0 then
message(scan_e_utf8_bigger_than_65535)
{ three chars }
else if (ord(c) and $e0)=$e0 then
begin
w:=ord(c) and $f;
readchar;
if (ord(c) and $c0)<>$80 then
message(scan_e_utf8_malformed);
w:=(w shl 6) or (ord(c) and $3f);
readchar;
if (ord(c) and $c0)<>$80 then
message(scan_e_utf8_malformed);
w:=(w shl 6) or (ord(c) and $3f);
concatwidestringchar(patternw,w);
end
{ two chars }
else if (ord(c) and $c0)<>0 then
begin
w:=ord(c) and $1f;
readchar;
if (ord(c) and $c0)<>$80 then
message(scan_e_utf8_malformed);
w:=(w shl 6) or (ord(c) and $3f);
concatwidestringchar(patternw,w);
end
{ illegal }
else if (ord(c) and $80)<>0 then
message(scan_e_utf8_malformed)
else
concatwidestringchar(patternw,tcompilerwidechar(c))
end
else if iswidestring then
begin
if current_settings.sourcecodepage='utf8' then
concatwidestringchar(patternw,ord(c))
else
concatwidestringchar(patternw,asciichar2unicode(c))
end
else
begin
if len<255 then
begin
inc(len);
pattern[len]:=c;
end
else
begin
if not msgwritten then
begin
Message(scan_e_string_exceeds_255_chars);
msgwritten:=true;
end;
end;
end;
until false;
end;
'^' :
begin
readchar;
c:=upcase(c);
if c<#64 then
c:=chr(ord(c)+64)
else
c:=chr(ord(c)-64);
if iswidestring then
concatwidestringchar(patternw,asciichar2unicode(c))
else
begin
if len<255 then
begin
inc(len);
pattern[len]:=c;
end
else
begin
if not msgwritten then
begin
Message(scan_e_string_exceeds_255_chars);
msgwritten:=true;
end;
end;
end;
readchar;
end;
else
break;
end;
until false;
{ strings with length 1 become const chars }
if iswidestring then
begin
if patternw^.len=1 then
token:=_CWCHAR
else
token:=_CWSTRING;
end
else
begin
pattern[0]:=chr(len);
if len=1 then
token:=_CCHAR
else
token:=_CSTRING;
end;
goto exit_label;
end;
'>' :
begin
readchar;
if (block_type in [bt_type,bt_specialize]) then
token:=_RSHARPBRACKET
else
begin
case c of
'=' :
begin
readchar;
token:=_GTE;
goto exit_label;
end;
'>' :
begin
readchar;
token:=_OP_SHR;
goto exit_label;
end;
'<' :
begin { >< is for a symetric diff for sets }
readchar;
token:=_SYMDIF;
goto exit_label;
end;
end;
token:=_GT;
end;
goto exit_label;
end;
'<' :
begin
readchar;
if (block_type in [bt_type,bt_specialize]) then
token:=_LSHARPBRACKET
else
begin
case c of
'>' :
begin
readchar;
token:=_UNEQUAL;
goto exit_label;
end;
'=' :
begin
readchar;
token:=_LTE;
goto exit_label;
end;
'<' :
begin
readchar;
token:=_OP_SHL;
goto exit_label;
end;
end;
token:=_LT;
end;
goto exit_label;
end;
#26 :
begin
token:=_EOF;
checkpreprocstack;
goto exit_label;
end;
else
Illegal_Char(c);
end;
end;
exit_label:
lasttoken:=token;
end;
function tscannerfile.readpreproc:ttoken;
begin
skipspace;
case c of
'_',
'A'..'Z',
'a'..'z' :
begin
current_scanner.preproc_pattern:=readid;
readpreproc:=_ID;
end;
'0'..'9' :
begin
current_scanner.preproc_pattern:=readval_asstring;
{ realnumber? }
if c='.' then
begin
readchar;
while c in ['0'..'9'] do
begin
current_scanner.preproc_pattern:=current_scanner.preproc_pattern+c;
readchar;
end;
end;
readpreproc:=_ID;
end;
'$','%','&' :
begin
current_scanner.preproc_pattern:=readval_asstring;
readpreproc:=_ID;
end;
',' :
begin
readchar;
readpreproc:=_COMMA;
end;
'}' :
begin
readpreproc:=_END;
end;
'(' :
begin
readchar;
readpreproc:=_LKLAMMER;
end;
')' :
begin
readchar;
readpreproc:=_RKLAMMER;
end;
'[' :
begin
readchar;
readpreproc:=_LECKKLAMMER;
end;
']' :
begin
readchar;
readpreproc:=_RECKKLAMMER;
end;
'+' :
begin
readchar;
readpreproc:=_PLUS;
end;
'-' :
begin
readchar;
readpreproc:=_MINUS;
end;
'*' :
begin
readchar;
readpreproc:=_STAR;
end;
'/' :
begin
readchar;
readpreproc:=_SLASH;
end;
'=' :
begin
readchar;
readpreproc:=_EQUAL;
end;
'>' :
begin
readchar;
if c='=' then
begin
readchar;
readpreproc:=_GTE;
end
else
readpreproc:=_GT;
end;
'<' :
begin
readchar;
case c of
'>' :
begin
readchar;
readpreproc:=_UNEQUAL;
end;
'=' :
begin
readchar;
readpreproc:=_LTE;
end;
else
readpreproc:=_LT;
end;
end;
#26 :
begin
readpreproc:=_EOF;
checkpreprocstack;
end;
else
Illegal_Char(c);
end;
end;
function tscannerfile.asmgetcharstart : char;
begin
{ return first the character already
available in c }
lastasmgetchar:=c;
result:=asmgetchar;
end;
function tscannerfile.asmgetchar : char;
begin
if lastasmgetchar<>#0 then
begin
c:=lastasmgetchar;
lastasmgetchar:=#0;
end
else
readchar;
if in_asm_string then
begin
asmgetchar:=c;
exit;
end;
repeat
case c of
// the { ... } is used in ARM assembler to define register sets, so we can't used
// it as comment, either (* ... *), /* ... */ or // ... should be used instead.
// But compiler directives {$...} are allowed in ARM assembler.
'{' :
begin
{$ifdef arm}
readchar;
dec(inputpointer);
if c<>'$' then
begin
asmgetchar:='{';
exit;
end
else
{$endif arm}
skipcomment;
end;
#10,#13 :
begin
linebreak;
asmgetchar:=c;
exit;
end;
#26 :
begin
reload;
if (c=#26) and not assigned(inputfile.next) then
end_of_file;
continue;
end;
'/' :
begin
readchar;
if c='/' then
skipdelphicomment
else
begin
asmgetchar:='/';
lastasmgetchar:=c;
exit;
end;
end;
'(' :
begin
readchar;
if c='*' then
begin
c:=#0;{Signal skipoldtpcomment to reload a char }
skipoldtpcomment;
end
else
begin
asmgetchar:='(';
lastasmgetchar:=c;
exit;
end;
end;
else
begin
asmgetchar:=c;
exit;
end;
end;
until false;
end;
{*****************************************************************************
Helpers
*****************************************************************************}
procedure AddDirective(const s:string; dm: tdirectivemode; p:tdirectiveproc);
begin
if dm in [directive_all, directive_turbo] then
tdirectiveitem.create(turbo_scannerdirectives,s,p);
if dm in [directive_all, directive_mac] then
tdirectiveitem.create(mac_scannerdirectives,s,p);
end;
procedure AddConditional(const s:string; dm: tdirectivemode; p:tdirectiveproc);
begin
if dm in [directive_all, directive_turbo] then
tdirectiveitem.createcond(turbo_scannerdirectives,s,p);
if dm in [directive_all, directive_mac] then
tdirectiveitem.createcond(mac_scannerdirectives,s,p);
end;
{*****************************************************************************
Initialization
*****************************************************************************}
procedure InitScanner;
begin
InitWideString(patternw);
turbo_scannerdirectives:=TFPHashObjectList.Create;
mac_scannerdirectives:=TFPHashObjectList.Create;
{ Common directives and conditionals }
AddDirective('I',directive_all, @dir_include);
AddDirective('DEFINE',directive_all, @dir_define);
AddDirective('UNDEF',directive_all, @dir_undef);
AddConditional('IF',directive_all, @dir_if);
AddConditional('IFDEF',directive_all, @dir_ifdef);
AddConditional('IFNDEF',directive_all, @dir_ifndef);
AddConditional('ELSE',directive_all, @dir_else);
AddConditional('ELSEIF',directive_all, @dir_elseif);
AddConditional('ENDIF',directive_all, @dir_endif);
{ Directives and conditionals for all modes except mode macpas}
AddDirective('INCLUDE',directive_turbo, @dir_include);
AddDirective('LIBPREFIX',directive_turbo, @dir_libprefix);
AddDirective('LIBSUFFIX',directive_turbo, @dir_libsuffix);
AddDirective('EXTENSION',directive_turbo, @dir_extension);
AddConditional('IFEND',directive_turbo, @dir_endif);
AddConditional('IFOPT',directive_turbo, @dir_ifopt);
{ Directives and conditionals for mode macpas: }
AddDirective('SETC',directive_mac, @dir_setc);
AddDirective('DEFINEC',directive_mac, @dir_definec);
AddDirective('UNDEFC',directive_mac, @dir_undef);
AddConditional('IFC',directive_mac, @dir_if);
AddConditional('ELSEC',directive_mac, @dir_else);
AddConditional('ELIFC',directive_mac, @dir_elseif);
AddConditional('ENDC',directive_mac, @dir_endif);
end;
procedure DoneScanner;
begin
turbo_scannerdirectives.Free;
mac_scannerdirectives.Free;
DoneWideString(patternw);
end;
end.
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