{
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2000 by the Free Pascal development team.
Processor independent implementation for the system unit
(adapted for intel i386.inc file)
See the file COPYING.FPC, included in this distribution,
for details about the copyright.
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.
**********************************************************************}
{****************************************************************************
Primitives
****************************************************************************}
type
pstring = ^shortstring;
{$ifndef FPC_SYSTEM_HAS_MOVE}
procedure Move(const source;var dest;count:SizeInt);[public, alias: 'FPC_MOVE'];
type
bytearray = array [0..high(sizeint)-1] of byte;
var
i:longint;
begin
if count <= 0 then exit;
Dec(count);
if @source<@dest then
begin
for i:=count downto 0 do
bytearray(dest)[i]:=bytearray(source)[i];
end
else
begin
for i:=0 to count do
bytearray(dest)[i]:=bytearray(source)[i];
end;
end;
{$endif not FPC_SYSTEM_HAS_MOVE}
{$ifndef FPC_SYSTEM_HAS_FILLCHAR}
Procedure FillChar(var x;count:SizeInt;value:byte);
type
longintarray = array [0..high(sizeint) div 4-1] of longint;
bytearray = array [0..high(sizeint)-1] of byte;
var
i,v : longint;
begin
if count <= 0 then exit;
v := 0;
{ aligned? }
if (PtrUInt(@x) mod sizeof(PtrUInt))<>0 then
begin
for i:=0 to count-1 do
bytearray(x)[i]:=value;
end
else
begin
v:=(value shl 8) or (value and $FF);
v:=(v shl 16) or (v and $ffff);
for i:=0 to (count div 4)-1 do
longintarray(x)[i]:=v;
for i:=(count div 4)*4 to count-1 do
bytearray(x)[i]:=value;
end;
end;
{$endif FPC_SYSTEM_HAS_FILLCHAR}
{$ifndef INTERNALMOVEFILLCHAR}
{$ifndef FPC_SYSTEM_HAS_FILLBYTE}
procedure FillByte (var x;count : SizeInt;value : byte );
begin
FillChar (X,Count,CHR(VALUE));
end;
{$endif not FPC_SYSTEM_HAS_FILLBYTE}
{$endif INTERNALMOVEFILLCHAR}
{$ifndef FPC_SYSTEM_HAS_FILLWORD}
procedure fillword(var x;count : SizeInt;value : word);
type
longintarray = array [0..high(sizeint) div 4-1] of longint;
wordarray = array [0..high(sizeint) div 2-1] of word;
var
i,v : longint;
begin
if Count <= 0 then exit;
{ aligned? }
if (PtrUInt(@x) mod sizeof(PtrUInt))<>0 then
begin
for i:=0 to count-1 do
wordarray(x)[i]:=value;
end
else
begin
v:=value*$10000+value;
for i:=0 to (count div 2) -1 do
longintarray(x)[i]:=v;
for i:=(count div 2)*2 to count-1 do
wordarray(x)[i]:=value;
end;
end;
{$endif not FPC_SYSTEM_HAS_FILLWORD}
{$ifndef FPC_SYSTEM_HAS_FILLDWORD}
procedure FillDWord(var x;count : SizeInt;value : DWord);
type
longintarray = array [0..high(sizeint) div 4-1] of longint;
begin
if count <= 0 then exit;
while Count<>0 do
begin
{ range checking must be disabled here }
longintarray(x)[count-1]:=longint(value);
Dec(count);
end;
end;
{$endif FPC_SYSTEM_HAS_FILLDWORD}
{$ifndef FPC_SYSTEM_HAS_INDEXCHAR}
function IndexChar(Const buf;len:SizeInt;b:char):SizeInt;
begin
IndexChar:=IndexByte(Buf,Len,byte(B));
end;
{$endif not FPC_SYSTEM_HAS_INDEXCHAR}
{$ifndef FPC_SYSTEM_HAS_INDEXBYTE}
function IndexByte(Const buf;len:SizeInt;b:byte):SizeInt;
type
bytearray = array [0..high(sizeint)-1] of byte;
var
I : longint;
begin
I:=0;
{ simulate assembler implementations behaviour, which is expected }
{ fpc_pchar_to_ansistr in astrings.inc }
if (len < 0) then
len := high(longint);
while (I<Len) and (bytearray(buf)[I]<>b) do
inc(I);
if (i=Len) then
i:=-1; {Can't use 0, since it is a possible value}
IndexByte:=I;
end;
{$endif not FPC_SYSTEM_HAS_INDEXBYTE}
{$ifndef FPC_SYSTEM_HAS_INDEXWORD}
function Indexword(Const buf;len:SizeInt;b:word):SizeInt;
type
wordarray = array [0..high(sizeint) div 2-1] of word;
var
I : longint;
begin
I:=0;
if (len < 0) then
len := high(longint);
while (I<Len) and (wordarray(buf)[I]<>b) do
inc(I);
if (i=Len) then
i:=-1; {Can't use 0, since it is a possible value for index}
Indexword:=I;
end;
{$endif not FPC_SYSTEM_HAS_INDEXWORD}
{$ifndef FPC_SYSTEM_HAS_INDEXDWORD}
function IndexDWord(Const buf;len:SizeInt;b:DWord):SizeInt;
type
dwordarray = array [0..high(sizeint) div 4-1] of dword;
var
I : longint;
begin
I:=0;
if (len < 0) then
len := high(longint);
while (I<Len) and (dwordarray(buf)[I]<>b) do
inc(I);
if (i=Len) then
i:=-1; {Can't use 0, since it is a possible value for index}
IndexDWord:=I;
end;
{$endif not FPC_SYSTEM_HAS_INDEXDWORD}
{$ifndef FPC_SYSTEM_HAS_COMPARECHAR}
function CompareChar(Const buf1,buf2;len:SizeInt):SizeInt;
begin
CompareChar:=CompareByte(buf1,buf2,len);
end;
{$endif not FPC_SYSTEM_HAS_COMPARECHAR}
{$ifndef FPC_SYSTEM_HAS_COMPAREBYTE}
function CompareByte(Const buf1,buf2;len:SizeInt):SizeInt;
type
bytearray = array [0..high(sizeint)-1] of byte;
var
I : longint;
begin
I:=0;
if (Len<>0) and (@Buf1<>@Buf2) then
begin
while (bytearray(Buf1)[I]=bytearray(Buf2)[I]) and (I<Len) do
inc(I);
if I=Len then {No difference}
I:=0
else
begin
I:=bytearray(Buf1)[I]-bytearray(Buf2)[I];
if I>0 then
I:=1
else
if I<0 then
I:=-1;
end;
end;
CompareByte:=I;
end;
{$endif not FPC_SYSTEM_HAS_COMPAREBYTE}
{$ifndef FPC_SYSTEM_HAS_COMPAREWORD}
function CompareWord(Const buf1,buf2;len:SizeInt):SizeInt;
type
wordarray = array [0..high(sizeint) div 2-1] of word;
var
I : longint;
begin
I:=0;
if (Len<>0) and (@Buf1<>@Buf2) then
begin
while (wordarray(Buf1)[I]=wordarray(Buf2)[I]) and (I<Len) do
inc(I);
if I=Len then {No difference}
I:=0
else
begin
I:=wordarray(Buf1)[I]-wordarray(Buf2)[I];
if I>0 then
I:=1
else
if I<0 then
I:=-1;
end;
end;
CompareWord:=I;
end;
{$endif not FPC_SYSTEM_HAS_COMPAREWORD}
{$ifndef FPC_SYSTEM_HAS_COMPAREDWORD}
function CompareDWord(Const buf1,buf2;len:SizeInt):SizeInt;
type
longintarray = array [0..high(sizeint) div 4-1] of longint;
var
I : longint;
begin
I:=0;
if (Len<>0) and (@Buf1<>@Buf2) then
begin
while (longintarray(Buf1)[I]=longintarray(Buf2)[I]) and (I<Len) do
inc(I);
if I=Len then {No difference}
I:=0
else
begin
I:=longintarray(Buf1)[I]-longintarray(Buf2)[I];
if I>0 then
I:=1
else
if I<0 then
I:=-1;
end;
end;
CompareDWord:=I;
end;
{$endif ndef FPC_SYSTEM_HAS_COMPAREDWORD}
{$ifndef FPC_SYSTEM_HAS_MOVECHAR0}
procedure MoveChar0(Const buf1;var buf2;len:SizeInt);
var
I : longint;
begin
if Len = 0 then exit;
I:=IndexByte(Buf1,Len,0);
if I<>-1 then
Move(Buf1,Buf2,I)
else
Move(Buf1,Buf2,len);
end;
{$endif ndef FPC_SYSTEM_HAS_MOVECHAR0}
{$ifndef FPC_SYSTEM_HAS_INDEXCHAR0}
function IndexChar0(Const buf;len:SizeInt;b:Char):SizeInt;
var
I : longint;
begin
if Len<>0 then
begin
I:=IndexByte(Buf,Len,0);
If (I=-1) then
I:=Len;
IndexChar0:=IndexByte(Buf,I,byte(b));
end
else
IndexChar0:=0;
end;
{$endif ndef FPC_SYSTEM_HAS_INDEXCHAR0}
{$ifndef FPC_SYSTEM_HAS_COMPARECHAR0}
function CompareChar0(Const buf1,buf2;len:SizeInt):SizeInt;
type
bytearray = array [0..high(sizeint)-1] of byte;
var
i : longint;
begin
I:=0;
if (Len<>0) and (@Buf1<>@Buf2) then
begin
while (I<Len) And
((Pbyte(@Buf1)[i]<>0) and (PByte(@buf2)[i]<>0)) and
(pbyte(@Buf1)[I]=pbyte(@Buf2)[I]) do
inc(I);
if (I=Len) or
(PByte(@Buf1)[i]=0) or
(PByte(@buf2)[I]=0) then {No difference or 0 reached }
I:=0
else
begin
I:=bytearray(Buf1)[I]-bytearray(Buf2)[I];
if I>0 then
I:=1
else
if I<0 then
I:=-1;
end;
end;
CompareChar0:=I;
end;
{$endif not FPC_SYSTEM_HAS_COMPARECHAR0}
{****************************************************************************
Object Helpers
****************************************************************************}
{$ifdef FPC_HAS_FEATURE_OBJECTS}
{$ifndef FPC_SYSTEM_HAS_FPC_HELP_CONSTRUCTOR}
{ Note: _vmt will be reset to -1 when memory is allocated,
this is needed for fpc_help_fail }
function fpc_help_constructor(_self:pointer;var _vmt:pointer;_vmt_pos:cardinal):pointer;[public,alias:'FPC_HELP_CONSTRUCTOR'];compilerproc;
type
ppointer = ^pointer;
pvmt = ^tvmt;
tvmt=packed record
size,msize:ptrint;
parent:pointer;
end;
var
vmtcopy : pointer;
begin
{ Inherited call? }
if _vmt=nil then
begin
fpc_help_constructor:=_self;
exit;
end;
vmtcopy:=_vmt;
if (_self=nil) and
(pvmt(_vmt)^.size>0) then
begin
getmem(_self,pvmt(_vmt)^.size);
{ reset vmt needed for fail }
_vmt:=pointer(-1);
end;
if _self<>nil then
begin
fillchar(_self^,pvmt(vmtcopy)^.size,#0);
ppointer(_self+_vmt_pos)^:=vmtcopy;
end;
fpc_help_constructor:=_self;
end;
{$endif FPC_SYSTEM_HAS_FPC_HELP_CONSTRUCTOR}
{$ifndef FPC_SYSTEM_HAS_FPC_HELP_DESTRUCTOR}
{ Note: _self will not be reset, the compiler has to generate the reset }
procedure fpc_help_destructor(_self,_vmt:pointer;vmt_pos:cardinal);[public,alias:'FPC_HELP_DESTRUCTOR']; compilerproc;
type
ppointer = ^pointer;
pvmt = ^tvmt;
tvmt = packed record
size,msize : ptrint;
parent : pointer;
end;
begin
{ already released? }
if (_self=nil) or
(_vmt=nil) or
(ppointer(_self+vmt_pos)^=nil) then
exit;
if (pvmt(ppointer(_self+vmt_pos)^)^.size=0) or
(pvmt(ppointer(_self+vmt_pos)^)^.size+pvmt(ppointer(_self+vmt_pos)^)^.msize<>0) then
RunError(210);
{ reset vmt to nil for protection }
ppointer(_self+vmt_pos)^:=nil;
freemem(_self);
end;
{$endif FPC_SYSTEM_HAS_FPC_HELP_DESTRUCTOR}
{$ifndef FPC_SYSTEM_HAS_FPC_HELP_FAIL}
{ Note: _self will not be reset, the compiler has to generate the reset }
procedure fpc_help_fail(_self:pointer;var _vmt:pointer;vmt_pos:cardinal);[public,alias:'FPC_HELP_FAIL'];compilerproc;
type
ppointer = ^pointer;
pvmt = ^tvmt;
tvmt = packed record
size,msize : ptrint;
parent : pointer;
end;
begin
if (_self=nil) or (_vmt=nil) then
exit;
{ vmt=-1 when memory was allocated }
if ptrint(_vmt)=-1 then
begin
if (_self=nil) or (ppointer(_self+vmt_pos)^=nil) then
HandleError(210)
else
begin
ppointer(_self+vmt_pos)^:=nil;
freemem(_self);
{ reset _vmt to nil so it will not be freed a
second time }
_vmt:=nil;
end;
end
else
ppointer(_self+vmt_pos)^:=nil;
end;
{$endif FPC_SYSTEM_HAS_FPC_HELP_FAIL}
{$ifndef FPC_SYSTEM_HAS_FPC_CHECK_OBJECT}
procedure fpc_check_object(_vmt : pointer); [public,alias:'FPC_CHECK_OBJECT']; compilerproc;
type
pvmt = ^tvmt;
tvmt = packed record
size,msize : ptrint;
parent : pointer;
end;
begin
if (_vmt=nil) or
(pvmt(_vmt)^.size=0) or
(pvmt(_vmt)^.size+pvmt(_vmt)^.msize<>0) then
RunError(210);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_CHECK_OBJECT}
{$ifndef FPC_SYSTEM_HAS_FPC_CHECK_OBJECT_EXT}
{ checks for a correct vmt pointer }
{ deeper check to see if the current object is }
{ really related to the true }
procedure fpc_check_object_ext(vmt, expvmt : pointer); [public,alias:'FPC_CHECK_OBJECT_EXT']; compilerproc;
type
pvmt = ^tvmt;
tvmt = packed record
size,msize : ptrint;
parent : pointer;
end;
begin
if (vmt=nil) or
(pvmt(vmt)^.size=0) or
(pvmt(vmt)^.size+pvmt(vmt)^.msize<>0) then
RunError(210);
while assigned(vmt) do
if vmt=expvmt then
exit
else
vmt:=pvmt(vmt)^.parent;
RunError(219);
end;
{$endif not FPC_SYSTEM_HAS_FPC_CHECK_OBJECT_EXT}
{$endif FPC_HAS_FEATURE_OBJECTS}
{****************************************************************************
String
****************************************************************************}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_ASSIGN}
function fpc_shortstr_to_shortstr(len:longint;const sstr:shortstring): shortstring;[public,alias:'FPC_SHORTSTR_TO_SHORTSTR']; compilerproc;
var
slen : byte;
begin
slen:=length(sstr);
if slen<len then
len:=slen;
move(sstr[0],result[0],len+1);
if slen>len then
result[0]:=chr(len);
end;
procedure fpc_shortstr_assign(len:longint;sstr,dstr:pointer);[public,alias:'FPC_SHORTSTR_ASSIGN']; {$ifdef HAS_COMPILER_PROC} compilerproc; {$endif}
var
slen : byte;
type
pstring = ^string;
begin
slen:=length(pstring(sstr)^);
if slen<len then
len:=slen;
move(sstr^,dstr^,len+1);
if slen>len then
pchar(dstr)^:=chr(len);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_SHORTSTR_ASSIGN}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_CONCAT}
{$ifndef STR_CONCAT_PROCS}
function fpc_shortstr_concat(const s1,s2:shortstring): shortstring;[public,alias:'FPC_SHORTSTR_CONCAT']; compilerproc;
var
s1l, s2l : byte;
begin
s1l:=length(s1);
s2l:=length(s2);
if s1l+s2l>255 then
s2l:=255-s1l;
move(s1[1],fpc_shortstr_concat[1],s1l);
move(s2[1],fpc_shortstr_concat[s1l+1],s2l);
fpc_shortstr_concat[0]:=chr(s1l+s2l);
end;
{$else STR_CONCAT_PROCS}
procedure fpc_shortstr_concat(var dests:shortstring;const s1,s2:shortstring);compilerproc;
var
s1l, s2l : longint;
begin
s1l:=length(s1);
s2l:=length(s2);
if s1l+s2l>high(dests) then
s2l:=high(dests)-s1l;
if @dests=@s1 then
move(s2[1],dests[s1l+1],s2l)
else
if @dests=@s2 then
begin
move(dests[1],dests[s1l+1],s2l);
move(s1[1],dests[1],s1l);
end
else
begin
move(s1[1],dests[1],s1l);
move(s2[1],dests[s1l+1],s2l);
end;
dests[0]:=chr(s1l+s2l);
end;
procedure fpc_shortstr_concat_multi(var dests:shortstring;const sarr:array of pshortstring);compilerproc;
var
s2l : byte;
LowStart,i,
Len : longint;
pc : pchar;
needtemp : boolean;
tmpstr : shortstring;
p,pdest : pshortstring;
begin
if high(sarr)=0 then
begin
DestS:='';
exit;
end;
lowstart:=low(sarr);
if Pointer(@DestS)=Pointer(sarr[lowstart]) then
inc(lowstart);
{ Check for another reuse, then we can't use
the append optimization and need to use a temp }
needtemp:=false;
for i:=lowstart to high(sarr) do
begin
if Pointer(@DestS)=Pointer(sarr[i]) then
begin
needtemp:=true;
break;
end;
end;
if needtemp then
begin
lowstart:=low(sarr);
tmpstr:='';
pdest:=@tmpstr
end
else
begin
{ Start with empty DestS if we start with concatting
the first array element }
if lowstart=low(sarr) then
DestS:='';
pdest:=@DestS;
end;
{ Concat all strings, except the string we already
copied in DestS }
Len:=length(pdest^);
pc:=@pdest^[1+Length(pdest^)];
for i:=lowstart to high(sarr) do
begin
p:=sarr[i];
if assigned(p) then
begin
s2l:=length(p^);
if Len+s2l>high(dests) then
s2l:=high(dests)-Len;
Move(p^[1],pc^,s2l);
inc(pc,s2l);
inc(Len,s2l);
end;
end;
pdest^[0]:=Chr(Len);
if needtemp then
DestS:=TmpStr;
end;
{$endif STR_CONCAT_PROCS}
{$endif ndef FPC_SYSTEM_HAS_FPC_SHORTSTR_CONCAT}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_APPEND_SHORTSTR}
procedure fpc_shortstr_append_shortstr(var s1:shortstring;const s2:shortstring);compilerproc;
[public,alias:'FPC_SHORTSTR_APPEND_SHORTSTR'];
var
s1l, s2l : integer;
begin
s1l:=length(s1);
s2l:=length(s2);
if s1l+s2l>high(s1) then
s2l:=high(s1)-s1l;
move(s2[1],s1[s1l+1],s2l);
s1[0]:=chr(s1l+s2l);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_SHORTSTR_APPEND_SHORTSTR}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_COMPARE}
function fpc_shortstr_compare(const left,right:shortstring) : longint;[public,alias:'FPC_SHORTSTR_COMPARE']; compilerproc;
var
s1,s2,max,i : byte;
d : longint;
begin
s1:=length(left);
s2:=length(right);
if s1<s2 then
max:=s1
else
max:=s2;
for i:=1 to max do
begin
d:=byte(left[i])-byte(right[i]);
if d>0 then
exit(1)
else if d<0 then
exit(-1);
end;
if s1>s2 then
exit(1)
else if s1<s2 then
exit(-1)
else
exit(0);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_SHORTSTR_COMPARE}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_COMPARE_EQUAL}
function fpc_shortstr_compare_equal(const left,right:shortstring): longint; [public,alias:'FPC_SHORTSTR_COMPARE_EQUAL']; compilerproc;
begin
Result := longint(left[0]) - longint(right[0]);
if Result = 0 then
Result := CompareByte(left[1],right[1], longint(left[0]));
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_SHORTSTR_COMPARE_EQUAL}
{$ifndef FPC_SYSTEM_HAS_FPC_PCHAR_TO_SHORTSTR}
function fpc_pchar_to_shortstr(p:pchar):shortstring;[public,alias:'FPC_PCHAR_TO_SHORTSTR']; compilerproc;
var
l : longint;
s: shortstring;
begin
if p=nil then
l:=0
else
l:=strlen(p);
if l>255 then
l:=255;
if l>0 then
move(p^,s[1],l);
s[0]:=chr(l);
fpc_pchar_to_shortstr := s;
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_PCHAR_TO_SHORTSTR}
{$ifndef FPC_SYSTEM_HAS_FPC_CHARARRAY_TO_SHORTSTR}
function fpc_chararray_to_shortstr(const arr: array of char; zerobased: boolean = true):shortstring;[public,alias:'FPC_CHARARRAY_TO_SHORTSTR']; compilerproc;
var
l: longint;
index: longint;
len: byte;
begin
l := high(arr)+1;
if l>=256 then
l:=255
else if l<0 then
l:=0;
if (zerobased) then
begin
index:=IndexByte(arr[0],l,0);
if (index < 0) then
len := l
else
len := index;
end
else
len := l;
move(arr[0],fpc_chararray_to_shortstr[1],len);
fpc_chararray_to_shortstr[0]:=chr(len);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_CHARARRAY_TO_SHORTSTR}
{$ifndef FPC_SYSTEM_HAS_FPC_SHORTSTR_TO_CHARARRAY}
{$ifndef FPC_STRTOCHARARRAYPROC}
{ inside the compiler, the resulttype is modified to that of the actual }
{ chararray we're converting to (JM) }
function fpc_shortstr_to_chararray(arraysize: longint; const src: ShortString): fpc_big_chararray;[public,alias: 'FPC_SHORTSTR_TO_CHARARRAY']; compilerproc;
var
len: longint;
begin
len := length(src);
if len > arraysize then
len := arraysize;
{$r-}
{ make sure we don't access char 1 if length is 0 (JM) }
if len > 0 then
move(src[1],fpc_shortstr_to_chararray[0],len);
fillchar(fpc_shortstr_to_chararray[len],arraysize-len,0);
{$ifdef RangeCheckWasOn}
{$r+}
{$endif}
end;
{$else ndef FPC_STRTOCHARARRAYPROC}
procedure fpc_shortstr_to_chararray(out res: array of char; const src: ShortString); compilerproc;
var
len: longint;
begin
len := length(src);
if len > length(res) then
len := length(res);
{$r-}
{ make sure we don't access char 1 if length is 0 (JM) }
if len > 0 then
move(src[1],res[0],len);
fillchar(res[len],length(res)-len,0);
{$ifdef RangeCheckWasOn}
{$r+}
{$endif}
end;
{$endif ndef FPC_STRTOCHARARRAYPROC}
{$endif FPC_SYSTEM_HAS_FPC_SHORTSTR_TO_CHARARRAY}
{$ifndef FPC_SYSTEM_HAS_FPC_PCHAR_LENGTH}
function fpc_pchar_length(p:pchar):longint;[public,alias:'FPC_PCHAR_LENGTH']; compilerproc;
var i : longint;
begin
i:=0;
while p[i]<>#0 do inc(i);
exit(i);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_PCHAR_LENGTH}
{$ifndef FPC_SYSTEM_HAS_FPC_PWIDECHAR_LENGTH}
function fpc_pwidechar_length(p:pwidechar):longint;[public,alias:'FPC_PWIDECHAR_LENGTH']; compilerproc;
var i : longint;
begin
i:=0;
while p[i]<>#0 do inc(i);
exit(i);
end;
{$endif ndef FPC_SYSTEM_HAS_FPC_PWIDECHAR_LENGTH}
{****************************************************************************
Caller/StackFrame Helpers
****************************************************************************}
{$ifndef FPC_SYSTEM_HAS_GET_FRAME}
{_$error Get_frame must be defined for each processor }
{$endif ndef FPC_SYSTEM_HAS_GET_FRAME}
{$ifndef FPC_SYSTEM_HAS_GET_CALLER_ADDR}
{_$error Get_caller_addr must be defined for each processor }
{$endif ndef FPC_SYSTEM_HAS_GET_CALLER_ADDR}
{$ifndef FPC_SYSTEM_HAS_GET_CALLER_FRAME}
{_$error Get_caller_frame must be defined for each processor }
{$endif ndef FPC_SYSTEM_HAS_GET_CALLER_FRAME}
{****************************************************************************
Math
****************************************************************************}
{****************************************************************************
Software longint/dword division
****************************************************************************}
{$ifdef FPC_INCLUDE_SOFTWARE_MOD_DIV}
function count_leading_zeros_32bit(l : longint) : longint;
var
i : longint;
begin
for i:=0 to 31 do
begin
if (l and (longint($80000000) shr i))<>0 then
begin
result:=i;
exit;
end;
end;
result:=i;
end;
{$ifndef FPC_SYSTEM_HAS_DIV_DWORD}
function fpc_div_dword(n,z : dword) : dword; [public,alias: 'FPC_DIV_DWORD']; compilerproc;
var
shift,lzz,lzn : longint;
begin
result:=0;
if n=0 then
HandleErrorFrame(200,get_frame);
lzz:=count_leading_zeros_32bit(z);
lzn:=count_leading_zeros_32bit(n);
{ if the denominator contains less zeros
then the numerator
the d is greater than the n }
if lzn<lzz then
exit;
shift:=lzn-lzz;
n:=n shl shift;
repeat
if z>=n then
begin
z:=z-n;
result:=result+dword(1 shl shift);
end;
dec(shift);
n:=n shr 1;
until shift<0;
end;
{$endif FPC_SYSTEM_HAS_DIV_DWORD}
{$ifndef FPC_SYSTEM_HAS_MOD_DWORD}
function fpc_mod_dword(n,z : dword) : dword; [public,alias: 'FPC_MOD_DWORD']; compilerproc;
var
shift,lzz,lzn : longint;
begin
result:=0;
if n=0 then
HandleErrorFrame(200,get_frame);
lzz:=count_leading_zeros_32bit(z);
lzn:=count_leading_zeros_32bit(n);
{ if the denominator contains less zeros
then the numerator
the d is greater than the n }
if lzn<lzz then
begin
result:=z;
exit;
end;
shift:=lzn-lzz;
n:=n shl shift;
repeat
if z>=n then
z:=z-n;
dec(shift);
n:=n shr 1;
until shift<0;
result:=z;
end;
{$endif FPC_SYSTEM_HAS_MOD_DWORD}
{$ifndef FPC_SYSTEM_HAS_DIV_LONGINT}
function fpc_div_longint(n,z : longint) : longint; [public,alias: 'FPC_DIV_LONGINT']; compilerproc;
var
sign : boolean;
d1,d2 : dword;
begin
if n=0 then
HandleErrorFrame(200,get_frame);
sign:=false;
if z<0 then
begin
sign:=not(sign);
d1:=dword(-z);
end
else
d1:=z;
if n<0 then
begin
sign:=not(sign);
d2:=dword(-n);
end
else
d2:=n;
{ the div is coded by the compiler as call to divdword }
if sign then
result:=-(d1 div d2)
else
result:=d1 div d2;
end;
{$endif FPC_SYSTEM_HAS_DIV_LONGINT}
{$ifndef FPC_SYSTEM_HAS_MOD_LONGINT}
function fpc_mod_longint(n,z : longint) : longint; [public,alias: 'FPC_MOD_LONGINT']; compilerproc;
var
signed : boolean;
r,nq,zq : dword;
begin
if n=0 then
HandleErrorFrame(200,get_frame);
nq:=abs(n);
if z<0 then
begin
zq:=dword(-z);
signed:=true;
end
else
begin
zq:=z;
signed:=false;
end;
r:=zq mod nq;
if signed then
result:=-longint(r)
else
result:=r;
end;
{$endif FPC_SYSTEM_HAS_MOD_LONGINT}
{$endif FPC_INCLUDE_SOFTWARE_MOD_DIV}
{****************************************************************************}
{$ifndef FPC_SYSTEM_HAS_ABS_LONGINT}
function abs(l:longint):longint;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
if l<0 then
abs:=-l
else
abs:=l;
end;
{$endif not FPC_SYSTEM_HAS_ABS_LONGINT}
{$ifndef FPC_SYSTEM_HAS_ODD_LONGINT}
function odd(l:longint):boolean;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
odd:=boolean(l and 1);
end;
{$endif ndef FPC_SYSTEM_HAS_ODD_LONGINT}
{$ifndef FPC_SYSTEM_HAS_ODD_LONGWORD}
function odd(l:longword):boolean;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
odd:=boolean(l and 1);
end;
{$endif ndef FPC_SYSTEM_HAS_ODD_LONGWORD}
{$ifndef FPC_SYSTEM_HAS_ODD_INT64}
function odd(l:int64):boolean;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
odd:=boolean(longint(l) and 1);
end;
{$endif ndef FPC_SYSTEM_HAS_ODD_INT64}
{$ifndef FPC_SYSTEM_HAS_ODD_QWORD}
function odd(l:qword):boolean;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
odd:=boolean(longint(l) and 1);
end;
{$endif ndef FPC_SYSTEM_HAS_ODD_QWORD}
{$ifndef FPC_SYSTEM_HAS_SQR_LONGINT}
function sqr(l:longint):longint;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
sqr:=l*l;
end;
{$endif ndef FPC_SYSTEM_HAS_SQR_LONGINT}
{$ifndef FPC_SYSTEM_HAS_ABS_INT64}
function abs(l: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
if l < 0 then
abs := -l
else
abs := l;
end;
{$endif ndef FPC_SYSTEM_HAS_ABS_INT64}
{$ifndef FPC_SYSTEM_HAS_SQR_INT64}
function sqr(l: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
sqr := l*l;
end;
{$endif ndef FPC_SYSTEM_HAS_SQR_INT64}
{$ifndef FPC_SYSTEM_HAS_SQR_QWORD}
function sqr(l: QWord): QWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
sqr := l*l;
end;
{$endif ndef FPC_SYSTEM_HAS_SQR_INT64}
{$ifndef FPC_SYSTEM_HAS_DECLOCKED_LONGINT}
function declocked(var l:longint):boolean;
begin
Dec(l);
declocked:=(l=0);
end;
{$endif FPC_SYSTEM_HAS_DECLOCKED_LONGINT}
{$ifndef FPC_SYSTEM_HAS_DECLOCKED_INT64}
function declocked(var l:int64):boolean;
begin
Dec(l);
declocked:=(l=0);
end;
{$endif FPC_SYSTEM_HAS_DECLOCKED_INT64}
{$ifndef FPC_SYSTEM_HAS_INCLOCKED_LONGINT}
procedure inclocked(var l:longint);
begin
Inc(l);
end;
{$endif FPC_SYSTEM_HAS_INCLOCKED_LONGINT}
{$ifndef FPC_SYSTEM_HAS_INCLOCKED_INT64}
procedure inclocked(var l:int64);
begin
Inc(l);
end;
{$endif FPC_SYSTEM_HAS_INCLOCKED_INT64}
{$ifndef FPC_SYSTEM_HAS_SPTR}
{_$error Sptr must be defined for each processor }
{$endif ndef FPC_SYSTEM_HAS_SPTR}
function align(addr : PtrUInt;alignment : PtrUInt) : PtrUInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
if addr mod alignment<>0 then
result:=addr+(alignment-(addr mod alignment))
else
result:=addr;
end;
function align(addr : Pointer;alignment : PtrUInt) : Pointer;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
if PtrUInt(addr) mod alignment<>0 then
result:=pointer(addr+(alignment-(PtrUInt(addr) mod alignment)))
else
result:=addr;
end;
{****************************************************************************
Str()
****************************************************************************}
{$ifndef FPC_SYSTEM_HAS_INT_STR_LONGINT}
procedure int_str(l:longint;out s:string);
var
m,m1 : longword;
pc,pc2 : pchar;
hs : string[32];
begin
pc2:=@s[1];
if (l<0) then
begin
pc2^:='-';
inc(pc2);
m:=longword(-l);
end
else
m:=longword(l);
pc:=@hs[0];
repeat
inc(pc);
m1:=m div 10;
pc^:=char(m-(m1*10)+byte('0'));
m:=m1;
until m=0;
while (pc>pchar(@hs[0])) do
begin
pc2^:=pc^;
dec(pc);
inc(pc2);
end;
s[0]:=char(pc2-pchar(@s[1]));
end;
{$endif ndef FPC_SYSTEM_HAS_INT_STR_LONGINT}
{$ifndef FPC_SYSTEM_HAS_INT_STR_LONGWORD}
procedure int_str(l:longword;out s:string);
var
m1 : longword;
pc,pc2 : pchar;
hs : string[32];
begin
pc2:=@s[1];
pc:=@hs[0];
repeat
inc(pc);
m1:=l div 10;
pc^:=char(l-(m1*10)+byte('0'));
l:=m1;
until l=0;
while (pc>pchar(@hs[0])) do
begin
pc2^:=pc^;
dec(pc);
inc(pc2);
end;
s[0]:=char(pc2-pchar(@s[1]));
end;
{$endif ndef FPC_SYSTEM_HAS_INT_STR_LONGWORD}
{$ifndef FPC_SYSTEM_HAS_INT_STR_INT64}
procedure int_str(l:int64;out s:string);
var
m,m1 : qword;
pc,pc2 : pchar;
hs : string[64];
begin
pc2:=@s[1];
if (l<0) then
begin
pc2^:='-';
inc(pc2);
m:=qword(-l);
end
else
m:=qword(l);
pc:=@hs[0];
repeat
inc(pc);
m1:=m div 10;
pc^:=char(m-(m1*10)+byte('0'));
m:=m1;
until m=0;
while (pc>pchar(@hs[0])) do
begin
pc2^:=pc^;
dec(pc);
inc(pc2);
end;
s[0]:=char(pc2-pchar(@s[1]));
end;
{$endif ndef FPC_SYSTEM_HAS_INT_STR_INT64}
{$ifndef FPC_SYSTEM_HAS_INT_STR_QWORD}
procedure int_str(l:qword;out s:string);
var
m1 : qword;
pc,pc2 : pchar;
hs : string[64];
begin
pc2:=@s[1];
pc:=@hs[0];
repeat
inc(pc);
m1:=l div 10;
pc^:=char(l-(m1*10)+byte('0'));
l:=m1;
until l=0;
while (pc>pchar(@hs[0])) do
begin
pc2^:=pc^;
dec(pc);
inc(pc2);
end;
s[0]:=char(pc2-pchar(@s[1]));
end;
{$endif ndef FPC_SYSTEM_HAS_INT_STR_QWORD}
{$ifndef FPC_SYSTEM_HAS_SYSRESETFPU}
procedure SysResetFpu;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
softfloat_exception_flags:=0;
softfloat_exception_mask:=float_flag_underflow or float_flag_inexact or float_flag_denormal;
end;
{$endif FPC_SYSTEM_HAS_SYSRESETFPU}
{$ifndef FPC_SYSTEM_HAS_SWAPENDIAN}
function SwapEndian(const AValue: SmallInt): SmallInt;
begin
Result := (AValue shr 8) or (AValue shl 8);
end;
function SwapEndian(const AValue: Word): Word;
begin
Result := (AValue shr 8) or (AValue shl 8);
end;
function SwapEndian(const AValue: LongInt): LongInt;
begin
Result := (AValue shl 24)
or ((AValue and $0000FF00) shl 8)
or ((AValue and $00FF0000) shr 8)
or (AValue shr 24);
end;
function SwapEndian(const AValue: DWord): DWord;
begin
Result := (AValue shl 24)
or ((AValue and $0000FF00) shl 8)
or ((AValue and $00FF0000) shr 8)
or (AValue shr 24);
end;
function SwapEndian(const AValue: Int64): Int64;
begin
Result := (AValue shl 56)
or ((AValue and $000000000000FF00) shl 40)
or ((AValue and $0000000000FF0000) shl 24)
or ((AValue and $00000000FF000000) shl 8)
or ((AValue and $000000FF00000000) shr 8)
or ((AValue and $0000FF0000000000) shr 24)
or ((AValue and $00FF000000000000) shr 40)
or (AValue shr 56);
end;
function SwapEndian(const AValue: QWord): QWord;
begin
Result := (AValue shl 56)
or ((AValue and $000000000000FF00) shl 40)
or ((AValue and $0000000000FF0000) shl 24)
or ((AValue and $00000000FF000000) shl 8)
or ((AValue and $000000FF00000000) shr 8)
or ((AValue and $0000FF0000000000) shr 24)
or ((AValue and $00FF000000000000) shr 40)
or (AValue shr 56);
end;
{$endif FPC_SYSTEM_HAS_SWAPENDIAN}
function BEtoN(const AValue: SmallInt): SmallInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function BEtoN(const AValue: Word): Word;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function BEtoN(const AValue: LongInt): LongInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function BEtoN(const AValue: DWord): DWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function BEtoN(const AValue: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function BEtoN(const AValue: QWord): QWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: SmallInt): SmallInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: Word): Word;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: LongInt): LongInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: DWord): DWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function LEtoN(const AValue: QWord): QWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: SmallInt): SmallInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: Word): Word;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: LongInt): LongInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: DWord): DWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoBE(const AValue: QWord): QWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_BIG}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: SmallInt): SmallInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: Word): Word;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: LongInt): LongInt;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: DWord): DWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: Int64): Int64;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
function NtoLE(const AValue: QWord): QWord;{$ifdef SYSTEMINLINE}inline;{$endif}
begin
{$IFDEF ENDIAN_LITTLE}
Result := AValue;
{$ELSE}
Result := SwapEndian(AValue);
{$ENDIF}
end;
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