{
$Id: wstrings.inc,v 1.34 2003/11/29 17:27:05 michael Exp $
This file is part of the Free Pascal run time library.
Copyright (c) 1999-2001 by Florian Klaempfl,
member of the Free Pascal development team.
This file implements support routines for WideStrings with FPC
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.
**********************************************************************}
{
This file contains the implementation of the WideString type,
and all things that are needed for it.
WideString is defined as a 'silent' pwidechar :
a pwidechar that points to :
@-12 : Longint for maximum size;
@-8 : Longint for size;
@-4 : Longint for reference count;
@ : String + Terminating #0;
Pwidechar(Widestring) is a valid typecast.
So WS[i] is converted to the address @WS+i-1.
Constants should be assigned a reference count of -1
Meaning that they can't be disposed of.
}
Type
PWideRec = ^TWideRec;
TWideRec = Packed Record
Maxlen,
len,
ref : Longint;
First : WideChar;
end;
Const
WideRecLen = SizeOf(TWideRec);
WideFirstOff = SizeOf(TWideRec)-sizeof(WideChar);
{
Default WideChar <-> Char conversion is to only convert the
lower 127 chars, all others are translated to spaces.
These routines can be overwritten for the Current Locale
}
procedure Wide2AnsiMove(source:pwidechar;dest:pchar;len:longint);
var
i : longint;
begin
for i:=1 to len do
begin
if word(source^)<128 then
dest^:=char(word(source^))
else
dest^:=' ';
inc(dest);
inc(source);
end;
end;
procedure Ansi2WideMove(source:pchar;dest:pwidechar;len:longint);
var
i : longint;
begin
for i:=1 to len do
begin
if byte(source^)<128 then
dest^:=widechar(byte(source^))
else
dest^:=' ';
inc(dest);
inc(source);
end;
end;
Const
Wide2AnsiMoveProc:TWide2AnsiMove=@Wide2AnsiMove;
Ansi2WideMoveProc:TAnsi2WideMove=@Ansi2WideMove;
Procedure GetWideStringManager (Var Manager : TWideStringManager);
begin
Manager.Wide2AnsiMove:=Wide2AnsiMoveProc;
Manager.Ansi2WideMove:=Ansi2WideMoveProc;
end;
Procedure SetWideStringManager (Const New : TWideStringManager; Var Old: TWideStringManager);
begin
GetWideStringManager(Old);
SetWideStringManager(New);
end;
Procedure SetWideStringManager (Const New : TWideStringManager);
begin
Wide2AnsiMoveProc:=New.Wide2AnsiMove;
Ansi2WideMoveProc:=New.Ansi2WideMove;
end;
(*
Procedure UniqueWideString(Var S : WideString); [Public,Alias : 'FPC_WIDESTR_UNIQUE'];
{
Make sure reference count of S is 1,
using copy-on-write semantics.
}
begin
end;
*)
{****************************************************************************
Internal functions, not in interface.
****************************************************************************}
{$ifdef WideStrDebug}
Procedure DumpWideRec(S : Pointer);
begin
If S=Nil then
Writeln ('String is nil')
Else
Begin
With PWideRec(S-WideFirstOff)^ do
begin
Write ('(Maxlen: ',maxlen);
Write (' Len:',len);
Writeln (' Ref: ',ref,')');
end;
end;
end;
{$endif}
Function NewWideString(Len : Longint) : Pointer;
{
Allocate a new WideString on the heap.
initialize it to zero length and reference count 1.
}
Var
P : Pointer;
l : Longint;
begin
{ request a multiple of 16 because the heap manager alloctes anyways chunks of 16 bytes }
L := (Len*sizeof(WideChar)+WideRecLen+15) and (not 15);
GetMem(P,l);
If P<>Nil then
begin
PWideRec(P)^.Maxlen:=(l-WideRecLen) div sizeof(WideChar); { Maximal length }
PWideRec(P)^.Len:=0; { Initial length }
PWideRec(P)^.Ref:=1; { Set reference count }
PWideRec(P)^.First:=#0; { Terminating #0 }
inc(p,WideFirstOff); { Points to string now }
end;
NewWideString:=P;
end;
Procedure DisposeWideString(Var S : Pointer);
{
Deallocates a WideString From the heap.
}
begin
If S=Nil then
exit;
Dec (S,WideFirstOff);
FreeMem (S);
S:=Nil;
end;
Procedure fpc_WideStr_Decr_Ref (Var S : Pointer);saveregisters;[Public,Alias:'FPC_WIDESTR_DECR_REF']; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Decreases the ReferenceCount of a non constant widestring;
If the reference count is zero, deallocate the string;
}
Type
plongint = ^longint;
Var
l : plongint;
Begin
{ Zero string }
If S=Nil then exit;
{ check for constant strings ...}
l:=@PWIDEREC(S-WideFirstOff)^.Ref;
If l^<0 then exit;
{ declocked does a MT safe dec and returns true, if the counter is 0 }
If declocked(l^) then
{ Ref count dropped to zero }
DisposeWideString (S); { Remove...}
{ this pointer is not valid anymore, so set it to zero }
S:=nil;
end;
{$ifdef hascompilerproc}
{ alias for internal use }
Procedure fpc_WideStr_Decr_Ref (Var S : Pointer);saveregisters;[external name 'FPC_WIDESTR_DECR_REF'];
{$endif compilerproc}
{$ifdef hascompilerproc}
Procedure fpc_WideStr_Incr_Ref (S : Pointer);saveregisters;[Public,Alias:'FPC_WIDESTR_INCR_REF']; {$ifdef hascompilerproc} compilerproc; {$endif}
{$else}
Procedure fpc_WideStr_Incr_Ref (Var S : Pointer);saveregisters;[Public,Alias:'FPC_WIDESTR_INCR_REF'];
{$endif compilerproc}
Begin
If S=Nil then
exit;
{ Let's be paranoid : Constant string ??}
If PWideRec(S-WideFirstOff)^.Ref<0 then exit;
inclocked(PWideRec(S-WideFirstOff)^.Ref);
end;
{$ifdef hascompilerproc}
{ alias for internal use }
Procedure fpc_WideStr_Incr_Ref (S : Pointer);saveregisters;[external name 'FPC_WIDESTR_INCR_REF'];
{$endif compilerproc}
function fpc_WideStr_To_ShortStr (high_of_res: longint;const S2 : WideString): shortstring;[Public, alias: 'FPC_WIDESTR_TO_SHORTSTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Converts a WideString to a ShortString;
}
Var
Size : Longint;
begin
if S2='' then
fpc_WideStr_To_ShortStr:=''
else
begin
Size:=Length(S2);
If Size>high_of_res then
Size:=high_of_res;
Wide2AnsiMoveProc(PWideChar(S2),PChar(@fpc_WideStr_To_ShortStr[1]),Size);
byte(fpc_WideStr_To_ShortStr[0]):=byte(Size);
end;
end;
Function fpc_ShortStr_To_WideStr (Const S2 : ShortString): WideString; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Converts a ShortString to a WideString;
}
Var
Size : Longint;
begin
Size:=Length(S2);
Setlength (fpc_ShortStr_To_WideStr,Size);
if Size>0 then
begin
Ansi2WideMoveProc(PChar(@S2[1]),PWideChar(Pointer(fpc_ShortStr_To_WideStr)),Size);
{ Terminating Zero }
PWideChar(Pointer(fpc_ShortStr_To_WideStr)+Size*sizeof(WideChar))^:=#0;
end;
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_ShortStr_To_WideStr (Var S1 : Pointer; Const S2 : ShortString);[Public, alias: 'FPC_SHORTSTR_TO_WIDESTR'];
begin
s1 := pointer(fpc_ShortStr_To_WideStr(s2));
end;
{$endif hascompilerproc}
Function fpc_WideStr_To_AnsiStr (const S2 : WideString): AnsiString; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Converts a WideString to an AnsiString
}
Var
Size : Longint;
begin
if s2='' then
exit;
Size:=Length(WideString(S2));
Setlength (fpc_WideStr_To_AnsiStr,Size);
if Size>0 then
begin
Wide2AnsiMoveProc(PWideChar(Pointer(S2)),PChar(Pointer(fpc_WideStr_To_AnsiStr)),Size);
{ Terminating Zero }
PChar(Pointer(fpc_WideStr_To_AnsiStr)+Size)^:=#0;
end;
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_WideStr_To_AnsiStr (Var S1 : Pointer;const S2 : WideString);[Public, alias: 'FPC_WIDESTR_TO_ANSISTR'];
begin
s1 := pointer(fpc_WideStr_To_AnsiStr(s2));
end;
{$endif hascompilerproc}
Function fpc_AnsiStr_To_WideStr (Const S2 : AnsiString): WideString; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Converts an AnsiString to a WideString;
}
Var
Size : Longint;
begin
if s2='' then
exit;
Size:=Length(S2);
Setlength (result,Size);
if Size>0 then
begin
Ansi2WideMoveProc(PChar(S2),PWideChar(Pointer(result)),Size);
{ Terminating Zero }
PWideChar(Pointer(result)+Size*sizeof(WideChar))^:=#0;
end;
end;
{ compilers with widestrings should have compiler procs }
Function fpc_PWideChar_To_AnsiStr(const p : pwidechar): ansistring; compilerproc;
var
Size : longint;
begin
if p=nil then
exit;
Size := IndexWord(p^, -1, 0);
Setlength (result,Size);
if Size>0 then
begin
Wide2AnsiMoveProc(P,PChar(Pointer(result)),Size);
{ Terminating Zero }
PChar(Pointer(result)+Size)^:=#0;
end;
end;
Function fpc_PWideChar_To_WideStr(const p : pwidechar): widestring; compilerproc;
var
Size : longint;
begin
if p=nil then
exit;
Size := IndexWord(p^, -1, 0);
Setlength (result,Size);
if Size>0 then
begin
Move(p^,PWideChar(Pointer(result))^,Size*sizeof(WideChar));
{ Terminating Zero }
PWideChar(Pointer(result)+Size*sizeof(WideChar))^:=#0;
end;
end;
Function fpc_PWideChar_To_ShortStr(const p : pwidechar): shortstring; compilerproc;
var
Size : longint;
begin
if p=nil then
begin
fpc_PWideChar_To_ShortStr:='';
exit;
end;
Size := IndexWord(p^, $7fffffff, 0);
Setlength (result,Size+1);
if Size>0 then
begin
If Size>255 then
Size:=255;
Wide2AnsiMoveProc(p,PChar(@result[1]),Size);
byte(result[0]):=byte(Size);
end;
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_AnsiStr_To_WideStr (Var S1 : Pointer; Const S2 : AnsiString);[Public, alias: 'FPC_ANSISTR_TO_WIDESTR'];
begin
s1 := pointer(fpc_AnsiStr_To_WideStr(s2));
end;
{$endif hascompilerproc}
{ checked against the ansistring routine, 2001-05-27 (FK) }
Procedure fpc_WideStr_Assign (Var S1 : Pointer;S2 : Pointer);[Public,Alias:'FPC_WIDESTR_ASSIGN']; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Assigns S2 to S1 (S1:=S2), taking in account reference counts.
}
begin
If S2<>nil then
If PWideRec(S2-WideFirstOff)^.Ref>0 then
Inc(PWideRec(S2-WideFirstOff)^.ref);
{ Decrease the reference count on the old S1 }
fpc_widestr_decr_ref (S1);
{ And finally, have S1 pointing to S2 (or its copy) }
S1:=S2;
end;
{$ifdef hascompilerproc}
{ alias for internal use }
Procedure fpc_WideStr_Assign (Var S1 : Pointer;S2 : Pointer);[external name 'FPC_WIDESTR_ASSIGN'];
{$endif hascompilerproc}
{ checked against the ansistring routine, 2001-05-27 (FK) }
{$ifdef hascompilerproc}
function fpc_WideStr_Concat (const S1,S2 : WideString): WideString; compilerproc;
var
S3: WideString absolute result;
{$else hascompilerproc}
Procedure fpc_WideStr_Concat (S1,S2 : WideString;var S3 : WideString);[Public, alias: 'FPC_WIDESTR_CONCAT'];
{$endif hascompilerproc}
{
Concatenates 2 WideStrings : S1+S2.
Result Goes to S3;
}
Var
Size,Location : Longint;
begin
{ only assign if s1 or s2 is empty }
if (S1='') then
S3 := S2
else
if (S2='') then
S3 := S1
else
begin
{ create new result }
Size:=Length(S2);
Location:=Length(S1);
SetLength (S3,Size+Location);
Move (S1[1],S3[1],Location*sizeof(WideChar));
Move (S2[1],S3[location+1],(Size+1)*sizeof(WideChar));
end;
end;
Function fpc_Char_To_WideStr(const c : Char): WideString; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Converts a Char to a WideString;
}
begin
if c = #0 then
{ result is automatically set to '' }
exit;
Setlength (fpc_Char_To_WideStr,1);
fpc_Char_To_WideStr[1]:=c;
{ Terminating Zero }
PWideChar(Pointer(fpc_Char_To_WideStr)+sizeof(WideChar))^:=#0;
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_Char_To_WideStr(var S1 : Pointer; c : Char);[Public, alias: 'FPC_CHAR_TO_WIDESTR'];
begin
s1 := pointer(fpc_Char_To_WideStr(c));
end;
{$endif hascompilerproc}
Function fpc_PChar_To_WideStr(const p : pchar): WideString; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
L : Longint;
begin
if (not assigned(p)) or (p[0]=#0) Then
{ result is automatically set to '' }
exit;
l:=IndexChar(p^,-1,#0);
SetLength(fpc_PChar_To_WideStr,L);
Ansi2WideMoveProc(P,PWideChar(Pointer(fpc_PChar_To_WideStr)),l);
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_PChar_To_WideStr(var a : WideString;p : pchar);[Public,Alias : 'FPC_PCHAR_TO_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
begin
pointer(a) := pointer(fpc_PChar_To_WideStr(p));
end;
{$endif hascompilerproc}
Function fpc_CharArray_To_WideStr(const arr: array of char): WideString; {$ifdef hascompilerproc} compilerproc; {$endif}
var
i : longint;
begin
if arr[0]=#0 Then
{ result is automatically set to '' }
exit;
i:=IndexChar(arr,high(arr)+1,#0);
if i = -1 then
i := high(arr)+1;
SetLength(fpc_CharArray_To_WideStr,i);
Ansi2WideMoveProc (pchar(@arr),PWideChar(Pointer(fpc_CharArray_To_WideStr)),i);
end;
{ old style helper }
{$ifndef hascompilerproc}
Procedure fpc_CharArray_To_WideStr(var a : WideString; p: pointer; len: longint); [Public,Alias : 'FPC_CHARARRAY_TO_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
var
src: pchar;
i: longint;
begin
src := pchar(p);
if src[0]=#0 Then
begin
pointer(a) := nil;
exit;
end;
i:=IndexChar(src^,len,#0);
if i = -1 then
i := len;
pointer(a) := NewWideString(i);
Ansi2WideMoveProc (src,PWideChar(Pointer(@a[1])),i);
end;
{$endif not hascompilerproc}
{$ifdef hascompilerproc}
{ inside the compiler, the resulttype is modified to that of the actual }
{ chararray we're converting to (JM) }
function fpc_widestr_to_chararray(arraysize: longint; const src: WideString): fpc_big_chararray;[public,alias: 'FPC_WIDESTR_TO_CHARARRAY']; compilerproc;
var
len: longint;
begin
len := length(src);
if len > arraysize then
len := arraysize;
{ make sure we don't dereference src if it can be nil (JM) }
if len > 0 then
wide2ansimoveproc(pwidechar(@src[1]),pchar(@fpc_widestr_to_chararray[0]),len);
fillchar(fpc_widestr_to_chararray[len],arraysize-len,0);
end;
{$endif hascompilerproc}
Function fpc_WideStr_Compare(const S1,S2 : WideString): Longint;[Public,Alias : 'FPC_WIDESTR_COMPARE']; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Compares 2 WideStrings;
The result is
<0 if S1<S2
0 if S1=S2
>0 if S1>S2
}
Var
MaxI,Temp : Longint;
begin
if pointer(S1)=pointer(S2) then
begin
fpc_WideStr_Compare:=0;
exit;
end;
Maxi:=Length(S1);
temp:=Length(S2);
If MaxI>Temp then
MaxI:=Temp;
Temp:=CompareWord(S1[1],S2[1],MaxI);
if temp=0 then
temp:=Length(S1)-Length(S2);
fpc_WideStr_Compare:=Temp;
end;
Procedure fpc_WideStr_CheckZero(p : pointer);[Public,Alias : 'FPC_WIDESTR_CHECKZERO']; {$ifdef hascompilerproc} compilerproc; {$endif}
begin
if p=nil then
HandleErrorFrame(201,get_frame);
end;
Procedure fpc_WideStr_CheckRange(len,index : longint);[Public,Alias : 'FPC_WIDESTR_RANGECHECK']; {$ifdef hascompilerproc} compilerproc; {$endif}
begin
if (index>len) or (Index<1) then
HandleErrorFrame(201,get_frame);
end;
{$ifndef INTERNSETLENGTH}
Procedure SetLength (Var S : WideString; l : Longint);
{$else INTERNSETLENGTH}
Procedure fpc_WideStr_SetLength (Var S : WideString; l : Longint);[Public,Alias : 'FPC_WIDESTR_SETLENGTH']; {$ifdef hascompilerproc} compilerproc; {$endif}
{$endif INTERNSETLENGTH}
{
Sets The length of string S to L.
Makes sure S is unique, and contains enough room.
}
Var
Temp : Pointer;
movelen, NewLen: longint;
begin
if (l>0) then
begin
if Pointer(S)=nil then
begin
{ Need a complete new string...}
Pointer(s):=NewWideString(l);
end
else if (PWideRec(Pointer(S)-WideFirstOff)^.Ref = 1) then
begin
if (PWideRec(Pointer(S)-WideFirstOff)^.Maxlen < L) then
begin
Dec(Pointer(S),WideFirstOff);
NewLen := (L*sizeof(WideChar)+WideRecLen+15) and (not 15);
reallocmem(pointer(S), NewLen);
PAnsiRec(S)^.MaxLen := (NewLen - WideRecLen) div sizeof(WideChar);
Inc(Pointer(S), WideFirstOff);
end;
PWideRec(Pointer(S)-WideFirstOff)^.Len := L;
PWord(Pointer(S)+L*sizeof(WideChar))^:=0;
end
else
begin
{ Reallocation is needed... }
Temp:=Pointer(NewWideString(L));
if Length(S)>0 then
begin
if l < succ(length(s)) then
movelen := l
{ also move terminating null }
else movelen := succ(length(s));
Move(Pointer(S)^,Temp^,movelen * Sizeof(WideChar));
end;
fpc_widestr_decr_ref(Pointer(S));
Pointer(S):=Temp;
end;
{ Force nil termination in case it gets shorter }
PWord(Pointer(S)+l*sizeof(WideChar))^:=0;
PWideRec(Pointer(S)-FirstOff)^.Len:=l;
end
else
begin
{ Length=0 }
if Pointer(S)<>nil then
fpc_widestr_decr_ref (Pointer(S));
Pointer(S):=Nil;
end;
end;
{*****************************************************************************
Public functions, In interface.
*****************************************************************************}
function WideCharToString(S : PWideChar) : AnsiString;
begin
result:=WideCharLenToString(s,Length(WideString(s)));
end;
function StringToWideChar(const Src : AnsiString;Dest : PWideChar;DestSize : LongInt) : PWideChar;
begin
if Length(Src)<DestSize then
Ansi2WideMoveProc(PChar(Src),Dest,Length(Src))
else
Ansi2WideMoveProc(PChar(Src),Dest,DestSize);
result:=Dest;
end;
function WideCharLenToString(S : PWideChar;Len : LongInt) : AnsiString;
begin
SetLength(result,Len);
Wide2AnsiMove(S,PChar(result),Len);
end;
procedure WideCharLenToStrVar(Src : PWideChar;Len : LongInt;var Dest : AnsiString);
begin
Dest:=WideCharLenToString(Src,Len);
end;
procedure WideCharToStrVar(S : PWideChar;var Dest : AnsiString);
begin
Dest:=WideCharToString(S);
end;
{$ifndef INTERNLENGTH}
Function Length (Const S : WideString) : Longint;
{
Returns the length of an WideString.
Takes in acount that zero strings are NIL;
}
begin
If Pointer(S)=Nil then
Length:=0
else
Length:=PWideRec(Pointer(S)-WideFirstOff)^.Len;
end;
{$endif INTERNLENGTH}
{ overloaded version of UniqueString for interface }
procedure UniqueString(Var S : WideString); [external name 'FPC_WIDESTR_UNIQUE'];
Function fpc_widestr_Unique(Var S : Pointer): Pointer; [Public,Alias : 'FPC_WIDESTR_UNIQUE']; {$ifdef hascompilerproc} compilerproc; {$endif}
{
Make sure reference count of S is 1,
using copy-on-write semantics.
}
Var
SNew : Pointer;
L : Longint;
begin
pointer(result) := pointer(s);
If Pointer(S)=Nil then
exit;
if PWideRec(Pointer(S)-WideFirstOff)^.Ref<>1 then
begin
L:=PWideRec(Pointer(S)-WideFirstOff)^.len;
SNew:=NewWideString (L);
Move (PWideChar(S)^,SNew^,(L+1)*sizeof(WideChar));
PWideRec(SNew-WideFirstOff)^.len:=L;
fpc_widestr_decr_ref (Pointer(S)); { Thread safe }
pointer(S):=SNew;
pointer(result):=SNew;
end;
end;
{$ifdef interncopy}
Function Fpc_WideStr_Copy (Const S : WideString; Index,Size : Longint) : WideString;compilerproc;
{$else}
Function Copy (Const S : WideString; Index,Size : Longint) : WideString;
{$endif}
var
ResultAddress : Pointer;
begin
ResultAddress:=Nil;
dec(index);
if Index < 0 then
Index := 0;
{ Check Size. Accounts for Zero-length S, the double check is needed because
Size can be maxint and will get <0 when adding index }
if (Size>Length(S)) or
(Index+Size>Length(S)) then
Size:=Length(S)-Index;
If Size>0 then
begin
If Index<0 Then
Index:=0;
ResultAddress:=Pointer(NewWideString (Size));
if ResultAddress<>Nil then
begin
Move (PWideChar(S)[Index],ResultAddress^,Size*sizeof(WideChar));
PWideRec(ResultAddress-WideFirstOff)^.Len:=Size;
PWideChar(ResultAddress+Size*sizeof(WideChar))^:=#0;
end;
end;
{$ifdef interncopy}
Pointer(fpc_widestr_Copy):=ResultAddress;
{$else}
Pointer(Copy):=ResultAddress;
{$endif}
end;
Function Pos (Const Substr : WideString; Const Source : WideString) : Longint;
var
i,MaxLen : StrLenInt;
pc : pwidechar;
begin
Pos:=0;
if Length(SubStr)>0 then
begin
MaxLen:=Length(source)-Length(SubStr);
i:=0;
pc:=@source[1];
while (i<=MaxLen) do
begin
inc(i);
if (SubStr[1]=pc^) and
(CompareWord(Substr[1],pc^,Length(SubStr))=0) then
begin
Pos:=i;
exit;
end;
inc(pc);
end;
end;
end;
{ Faster version for a widechar alone }
Function Pos (c : WideChar; Const s : WideString) : Longint;
var
i: longint;
pc : pwidechar;
begin
pc:=@s[1];
for i:=1 to length(s) do
begin
if pc^=c then
begin
pos:=i;
exit;
end;
inc(pc);
end;
pos:=0;
end;
{ Faster version for a char alone. Must be implemented because }
{ pos(c: char; const s: shortstring) also exists, so otherwise }
{ using pos(char,pchar) will always call the shortstring version }
{ (exact match for first argument), also with $h+ (JM) }
Function Pos (c : Char; Const s : WideString) : Longint;
var
i: longint;
wc : widechar;
pc : pwidechar;
begin
wc:=c;
pc:=@s[1];
for i:=1 to length(s) do
begin
if pc^=wc then
begin
pos:=i;
exit;
end;
inc(pc);
end;
pos:=0;
end;
Procedure Delete (Var S : WideString; Index,Size: Longint);
Var
LS : Longint;
begin
If Length(S)=0 then
exit;
if index<=0 then
exit;
LS:=PWideRec(Pointer(S)-WideFirstOff)^.Len;
if (Index<=LS) and (Size>0) then
begin
UniqueString (S);
if Size+Index>LS then
Size:=LS-Index+1;
if Index+Size<=LS then
begin
Dec(Index);
Move(PWideChar(S)[Index+Size],PWideChar(S)[Index],(LS-Index+1)*sizeof(WideChar));
end;
Setlength(s,LS-Size);
end;
end;
Procedure Insert (Const Source : WideString; Var S : WideString; Index : Longint);
var
Temp : WideString;
LS : Longint;
begin
If Length(Source)=0 then
exit;
if index <= 0 then
index := 1;
Ls:=Length(S);
if index > LS then
index := LS+1;
Dec(Index);
Pointer(Temp) := NewWideString(Length(Source)+LS);
SetLength(Temp,Length(Source)+LS);
If Index>0 then
move (PWideChar(S)^,PWideChar(Temp)^,Index*sizeof(WideChar));
Move (PWideChar(Source)^,PWideChar(Temp)[Index],Length(Source)*sizeof(WideChar));
If (LS-Index)>0 then
Move(PWideChar(S)[Index],PWideChar(temp)[Length(Source)+index],(LS-Index)*sizeof(WideChar));
S:=Temp;
end;
Procedure SetString (Var S : WideString; Buf : PWideChar; Len : Longint);
var
BufLen: longint;
begin
SetLength(S,Len);
If (Buf<>Nil) and (Len>0) then
begin
BufLen := IndexWord(Buf^, Len+1, 0);
If (BufLen>0) and (BufLen < Len) then
Len := BufLen;
Move (Buf[0],S[1],Len*sizeof(WideChar));
PWideChar(Pointer(S)+Len*sizeof(WideChar))^:=#0;
end;
end;
Procedure SetString (Var S : WideString; Buf : PChar; Len : Longint);
var
BufLen: longint;
begin
SetLength(S,Len);
If (Buf<>Nil) and (Len>0) then
begin
BufLen := IndexByte(Buf^, Len+1, 0);
If (BufLen>0) and (BufLen < Len) then
Len := BufLen;
Ansi2WideMoveProc(Buf,PWideChar(S),Len);
PWideChar(Pointer(S)+Len*sizeof(WideChar))^:=#0;
end;
end;
Function fpc_Val_Real_WideStr(Const S : WideString; Var Code : ValSInt): ValReal; [public, alias:'FPC_VAL_REAL_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : String;
begin
fpc_Val_Real_WideStr := 0;
if length(S) > 255 then
code := 256
else
begin
SS := S;
Val(SS,fpc_Val_Real_WideStr,code);
end;
end;
Function fpc_Val_UInt_WideStr (Const S : WideString; Var Code : ValSInt): ValUInt; [public, alias:'FPC_VAL_UINT_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
fpc_Val_UInt_WideStr := 0;
if length(S) > 255 then
code := 256
else
begin
SS := S;
Val(SS,fpc_Val_UInt_WideStr,code);
end;
end;
Function fpc_Val_SInt_WideStr (DestSize: longint; Const S : WideString; Var Code : ValSInt): ValSInt; [public, alias:'FPC_VAL_SINT_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
fpc_Val_SInt_WideStr:=0;
if length(S)>255 then
code:=256
else
begin
SS := S;
fpc_Val_SInt_WideStr := fpc_Val_SInt_ShortStr(DestSize,SS,Code);
end;
end;
Function fpc_Val_qword_WideStr (Const S : WideString; Var Code : ValSInt): qword; [public, alias:'FPC_VAL_QWORD_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
fpc_Val_qword_WideStr:=0;
if length(S)>255 then
code:=256
else
begin
SS := S;
Val(SS,fpc_Val_qword_WideStr,Code);
end;
end;
Function fpc_Val_int64_WideStr (Const S : WideString; Var Code : ValSInt): Int64; [public, alias:'FPC_VAL_INT64_WIDESTR']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
fpc_Val_int64_WideStr:=0;
if length(S)>255 then
code:=256
else
begin
SS := S;
Val(SS,fpc_Val_int64_WideStr,Code);
end;
end;
procedure fpc_WideStr_Float(d : ValReal;len,fr,rt : longint;var s : WideString);[public,alias:'FPC_WIDESTR_FLOAT']; {$ifdef hascompilerproc} compilerproc; {$endif}
var
ss : shortstring;
begin
str_real(len,fr,d,treal_type(rt),ss);
s:=ss;
end;
Procedure fpc_WideStr_Longword(C : Longword;Len : Longint; Var S : WideString);[Public,Alias : 'FPC_WIDESTR_CARDINAL']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
str(C:Len,SS);
S:=SS;
end;
Procedure fpc_WideStr_Longint(L : Longint; Len : Longint; Var S : WideString);[Public,Alias : 'FPC_WIDESTR_LONGINT']; {$ifdef hascompilerproc} compilerproc; {$endif}
Var
SS : ShortString;
begin
Str (L:Len,SS);
S:=SS;
end;
{
$Log: wstrings.inc,v $
Revision 1.34 2003/11/29 17:27:05 michael
+ Added overloaded version of SetWideStringManager without old parameter
Revision 1.33 2003/11/28 20:36:13 michael
+ Added WideStringManager
Revision 1.32 2003/11/05 15:33:51 florian
* made Index* usage consistent with astrings.inc
Revision 1.31 2003/06/17 19:24:08 jonas
* fixed conversion of fpc_*str_unique to compilerproc
Revision 1.30 2003/06/17 16:38:53 jonas
* fpc_{ansistr|widestr}_unique is now a function so it can be used as
compilerproc
Revision 1.29 2003/05/01 08:05:23 florian
* started to make the rtl 64 bit save by introducing SizeInt and SizeUInt (similar to size_t of C)
Revision 1.28 2002/12/29 16:59:17 peter
* implemented some more conversions
Revision 1.27 2002/12/15 22:33:12 peter
* SetString(WideString,[PChar|PWideChar],Len) added
Revision 1.26 2002/12/14 19:16:45 sg
* Ported improvements from the AnsiString equivalents to NewWideString and
fpc_WideStr_SetLength
Revision 1.25 2002/12/07 14:35:34 carl
- avoid warnings (add typecast)
Revision 1.24 2002/10/10 16:08:50 florian
+ several widestring/pwidechar related helpers added
Revision 1.23 2002/10/02 18:21:52 peter
* Copy() changed to internal function calling compilerprocs
* FPC_SHORTSTR_COPY renamed to FPC_SHORTSTR_ASSIGN because of the
new copy functions
Revision 1.22 2002/09/26 21:50:38 florian
+ some WideString<->AnsiString conversion functions added
Revision 1.21 2002/09/14 11:20:50 carl
* Delphi compatibility fix (with string routines)
Revision 1.20 2002/09/07 21:16:45 carl
* cardinal -> longword
Revision 1.19 2002/09/07 15:07:46 peter
* old logs removed and tabs fixed
Revision 1.18 2002/07/29 21:28:17 florian
* several fixes to get further with linux/ppc system unit compilation
Revision 1.17 2002/04/26 15:19:05 peter
* use saveregisters for incr routines, saves also problems with
the optimizer
Revision 1.16 2002/04/25 20:14:57 peter
* updated compilerprocs
* incr ref count has now a value argument instead of var
}
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