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|
{*****************************************************************************}
{ }
{ Tnt Delphi Unicode Controls }
{ http://www.tntware.com/delphicontrols/unicode/ }
{ Version: 2.3.0 }
{ }
{ Copyright (c) 2002-2007, Troy Wolbrink (troy.wolbrink@tntware.com) }
{ }
{*****************************************************************************}
unit TntSystem;
{$INCLUDE TntCompilers.inc}
{*****************************************************************************}
{ Special thanks go to Francisco Leong for originating the design for }
{ WideString-enabled resourcestrings. }
{*****************************************************************************}
interface
uses
Windows;
// These functions should not be used by Delphi code since conversions are implicit.
{TNT-WARN WideCharToString}
{TNT-WARN WideCharLenToString}
{TNT-WARN WideCharToStrVar}
{TNT-WARN WideCharLenToStrVar}
{TNT-WARN StringToWideChar}
// ................ ANSI TYPES ................
{TNT-WARN Char}
{TNT-WARN PChar}
{TNT-WARN String}
{TNT-WARN CP_ACP} // <-- use DefaultSystemCodePage
function DefaultSystemCodePage: Cardinal; // implicitly used when converting AnsiString <--> WideString.
var
WideCustomLoadResString: function(ResStringRec: PResStringRec; var Value: WideString): Boolean;
{TNT-WARN LoadResString}
function WideLoadResString(ResStringRec: PResStringRec): WideString;
{TNT-WARN ParamCount}
function WideParamCount: Integer;
{TNT-WARN ParamStr}
function WideParamStr(Index: Integer): WideString;
// ......... introduced .........
const
{ Each Unicode stream should begin with the code U+FEFF, }
{ which the standard defines as the *byte order mark*. }
UNICODE_BOM = WideChar($FEFF);
UNICODE_BOM_SWAPPED = WideChar($FFFE);
UTF8_BOM = AnsiString(#$EF#$BB#$BF);
function WideStringToUTF8(const S: WideString): AnsiString;
function UTF8ToWideString(const S: AnsiString): WideString;
function WideStringToUTF7(const W: WideString): AnsiString;
function UTF7ToWideString(const S: AnsiString): WideString;
function StringToWideStringEx(const S: AnsiString; CodePage: Cardinal): WideString;
function WideStringToStringEx(const WS: WideString; CodePage: Cardinal): AnsiString;
function UCS2ToWideString(const Value: AnsiString): WideString;
function WideStringToUCS2(const Value: WideString): AnsiString;
function CharSetToCodePage(ciCharset: UINT): Cardinal;
function LCIDToCodePage(ALcid: LCID): Cardinal;
function KeyboardCodePage: Cardinal;
function KeyUnicode(CharCode: Word): WideChar;
procedure StrSwapByteOrder(Str: PWideChar);
type
TTntSystemUpdate =
(tsWideResourceStrings
{$IFNDEF COMPILER_9_UP}, tsFixImplicitCodePage, tsFixWideStrConcat, tsFixWideFormat {$ENDIF}
);
TTntSystemUpdateSet = set of TTntSystemUpdate;
const
AllTntSystemUpdates = [Low(TTntSystemUpdate)..High(TTntSystemUpdate)];
procedure InstallTntSystemUpdates(Updates: TTntSystemUpdateSet = AllTntSystemUpdates);
implementation
uses
SysUtils, Variants, TntWindows, TntSysUtils;
var
GDefaultSystemCodePage: Cardinal;
function DefaultSystemCodePage: Cardinal;
begin
Result := GDefaultSystemCodePage;
end;
var
IsDebugging: Boolean;
function WideLoadResString(ResStringRec: PResStringRec): WideString;
const
MAX_RES_STRING_SIZE = 4097; { MSDN documents this as the maximum size of a string in table. }
var
Buffer: array [0..MAX_RES_STRING_SIZE] of WideChar; { Buffer leaves room for null terminator. }
PCustom: PAnsiChar;
begin
if Assigned(WideCustomLoadResString) and WideCustomLoadResString(ResStringRec, Result) then
exit; { a custom resourcestring has been loaded. }
if ResStringRec = nil then
Result := ''
else if ResStringRec.Identifier < 64*1024 then
SetString(Result, Buffer,
Tnt_LoadStringW(FindResourceHInstance(ResStringRec.Module^),
ResStringRec.Identifier, Buffer, MAX_RES_STRING_SIZE))
else begin
// custom string pointer
PCustom := PAnsiChar(ResStringRec.Identifier); { I would like to use PWideChar, but this would break legacy code. }
if (StrLen{TNT-ALLOW StrLen}(PCustom) > Cardinal(Length(UTF8_BOM)))
and CompareMem(PCustom, PAnsiChar(UTF8_BOM), Length(UTF8_BOM)) then
// detected UTF8
Result := UTF8ToWideString(PAnsiChar(PCustom + Length(UTF8_BOM)))
else
// normal
Result := PCustom;
end;
end;
function WideGetParamStr(P: PWideChar; var Param: WideString): PWideChar;
var
i, Len: Integer;
Start, S, Q: PWideChar;
begin
while True do
begin
while (P[0] <> #0) and (P[0] <= ' ') do
Inc(P);
if (P[0] = '"') and (P[1] = '"') then Inc(P, 2) else Break;
end;
Len := 0;
Start := P;
while P[0] > ' ' do
begin
if P[0] = '"' then
begin
Inc(P);
while (P[0] <> #0) and (P[0] <> '"') do
begin
Q := P + 1;
Inc(Len, Q - P);
P := Q;
end;
if P[0] <> #0 then
Inc(P);
end
else
begin
Q := P + 1;
Inc(Len, Q - P);
P := Q;
end;
end;
SetLength(Param, Len);
P := Start;
S := PWideChar(Param);
i := 0;
while P[0] > ' ' do
begin
if P[0] = '"' then
begin
Inc(P);
while (P[0] <> #0) and (P[0] <> '"') do
begin
Q := P + 1;
while P < Q do
begin
S[i] := P^;
Inc(P);
Inc(i);
end;
end;
if P[0] <> #0 then Inc(P);
end
else
begin
Q := P + 1;
while P < Q do
begin
S[i] := P^;
Inc(P);
Inc(i);
end;
end;
end;
Result := P;
end;
function WideParamCount: Integer;
var
P: PWideChar;
S: WideString;
begin
P := WideGetParamStr(GetCommandLineW, S);
Result := 0;
while True do
begin
P := WideGetParamStr(P, S);
if S = '' then Break;
Inc(Result);
end;
end;
function WideParamStr(Index: Integer): WideString;
var
P: PWideChar;
begin
if Index = 0 then
Result := WideGetModuleFileName(0)
else
begin
P := GetCommandLineW;
while True do
begin
P := WideGetParamStr(P, Result);
if (Index = 0) or (Result = '') then Break;
Dec(Index);
end;
end;
end;
function WideStringToUTF8(const S: WideString): AnsiString;
begin
Result := UTF8Encode(S);
end;
function UTF8ToWideString(const S: AnsiString): WideString;
begin
Result := UTF8Decode(S);
end;
{ ======================================================================= }
{ Original File: ConvertUTF7.c }
{ Author: David B. Goldsmith }
{ Copyright (C) 1994, 1996 Taligent, Inc. All rights reserved. }
{ }
{ This code is copyrighted. Under the copyright laws, this code may not }
{ be copied, in whole or part, without prior written consent of Taligent. }
{ }
{ Taligent grants the right to use this code as long as this ENTIRE }
{ copyright notice is reproduced in the code. The code is provided }
{ AS-IS, AND TALIGENT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR }
{ IMPLIED, INCLUDING, BUT NOT LIMITED TO IMPLIED WARRANTIES OF }
{ MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT }
{ WILL TALIGENT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING, }
{ WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS }
{ INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER PECUNIARY }
{ LOSS) ARISING OUT OF THE USE OR INABILITY TO USE THIS CODE, EVEN }
{ IF TALIGENT HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. }
{ BECAUSE SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF }
{ LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE }
{ LIMITATION MAY NOT APPLY TO YOU. }
{ }
{ RESTRICTED RIGHTS LEGEND: Use, duplication, or disclosure by the }
{ government is subject to restrictions as set forth in subparagraph }
{ (c)(l)(ii) of the Rights in Technical Data and Computer Software }
{ clause at DFARS 252.227-7013 and FAR 52.227-19. }
{ }
{ This code may be protected by one or more U.S. and International }
{ Patents. }
{ }
{ TRADEMARKS: Taligent and the Taligent Design Mark are registered }
{ trademarks of Taligent, Inc. }
{ ======================================================================= }
type UCS2 = Word;
const
_base64: AnsiString = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/';
_direct: AnsiString = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789''(),-./:?';
_optional: AnsiString = '!"#$%&*;<=>@[]^_`{|}';
_spaces: AnsiString = #9#13#10#32;
var
base64: PAnsiChar;
invbase64: array[0..127] of SmallInt;
direct: PAnsiChar;
optional: PAnsiChar;
spaces: PAnsiChar;
mustshiftsafe: array[0..127] of AnsiChar;
mustshiftopt: array[0..127] of AnsiChar;
var
needtables: Boolean = True;
procedure Initialize_UTF7_Data;
begin
base64 := PAnsiChar(_base64);
direct := PAnsiChar(_direct);
optional := PAnsiChar(_optional);
spaces := PAnsiChar(_spaces);
end;
procedure tabinit;
var
i: Integer;
limit: Integer;
begin
i := 0;
while (i < 128) do
begin
mustshiftopt[i] := #1;
mustshiftsafe[i] := #1;
invbase64[i] := -1;
Inc(i);
end { For };
limit := Length(_Direct);
i := 0;
while (i < limit) do
begin
mustshiftopt[Integer(direct[i])] := #0;
mustshiftsafe[Integer(direct[i])] := #0;
Inc(i);
end { For };
limit := Length(_Spaces);
i := 0;
while (i < limit) do
begin
mustshiftopt[Integer(spaces[i])] := #0;
mustshiftsafe[Integer(spaces[i])] := #0;
Inc(i);
end { For };
limit := Length(_Optional);
i := 0;
while (i < limit) do
begin
mustshiftopt[Integer(optional[i])] := #0;
Inc(i);
end { For };
limit := Length(_Base64);
i := 0;
while (i < limit) do
begin
invbase64[Integer(base64[i])] := i;
Inc(i);
end { For };
needtables := False;
end; { tabinit }
function WRITE_N_BITS(x: UCS2; n: Integer; var BITbuffer: Cardinal; var bufferbits: Integer): Integer;
begin
BITbuffer := BITbuffer or (x and (not (-1 shl n))) shl (32 - n - bufferbits);
bufferbits := bufferbits + n;
Result := bufferbits;
end; { WRITE_N_BITS }
function READ_N_BITS(n: Integer; var BITbuffer: Cardinal; var bufferbits: Integer): UCS2;
var
buffertemp: Cardinal;
begin
buffertemp := BITbuffer shr (32 - n);
BITbuffer := BITbuffer shl n;
bufferbits := bufferbits - n;
Result := UCS2(buffertemp);
end; { READ_N_BITS }
function ConvertUCS2toUTF7(var sourceStart: PWideChar; sourceEnd: PWideChar;
var targetStart: PAnsiChar; targetEnd: PAnsiChar; optional: Boolean;
verbose: Boolean): Integer;
var
r: UCS2;
target: PAnsiChar;
source: PWideChar;
BITbuffer: Cardinal;
bufferbits: Integer;
shifted: Boolean;
needshift: Boolean;
done: Boolean;
mustshift: PAnsiChar;
begin
Initialize_UTF7_Data;
Result := 0;
BITbuffer := 0;
bufferbits := 0;
shifted := False;
source := sourceStart;
target := targetStart;
r := 0;
if needtables then
tabinit;
if optional then
mustshift := @mustshiftopt[0]
else
mustshift := @mustshiftsafe[0];
repeat
done := source >= sourceEnd;
if not Done then
begin
r := Word(source^);
Inc(Source);
end { If };
needshift := (not done) and ((r > $7F) or (mustshift[r] <> #0));
if needshift and (not shifted) then
begin
if (Target >= TargetEnd) then
begin
Result := 2;
break;
end { If };
target^ := '+';
Inc(target);
{ Special case handling of the SHIFT_IN character }
if (r = UCS2('+')) then
begin
if (target >= targetEnd) then
begin
Result := 2;
break;
end;
target^ := '-';
Inc(target);
end
else
shifted := True;
end { If };
if shifted then
begin
{ Either write the character to the bit buffer, or pad }
{ the bit buffer out to a full base64 character. }
{ }
if needshift then
WRITE_N_BITS(r, 16, BITbuffer, bufferbits)
else
WRITE_N_BITS(0, (6 - (bufferbits mod 6)) mod 6, BITbuffer,
bufferbits);
{ Flush out as many full base64 characters as possible }
{ from the bit buffer. }
{ }
while (target < targetEnd) and (bufferbits >= 6) do
begin
Target^ := base64[READ_N_BITS(6, BITbuffer, bufferbits)];
Inc(Target);
end { While };
if (bufferbits >= 6) then
begin
if (target >= targetEnd) then
begin
Result := 2;
break;
end { If };
end { If };
if (not needshift) then
begin
{ Write the explicit shift out character if }
{ 1) The caller has requested we always do it, or }
{ 2) The directly encoded character is in the }
{ base64 set, or }
{ 3) The directly encoded character is SHIFT_OUT. }
{ }
if verbose or ((not done) and ((invbase64[r] >= 0) or (r =
Integer('-')))) then
begin
if (target >= targetEnd) then
begin
Result := 2;
Break;
end { If };
Target^ := '-';
Inc(Target);
end { If };
shifted := False;
end { If };
{ The character can be directly encoded as ASCII. }
end { If };
if (not needshift) and (not done) then
begin
if (target >= targetEnd) then
begin
Result := 2;
break;
end { If };
Target^ := AnsiChar(r);
Inc(Target);
end { If };
until (done);
sourceStart := source;
targetStart := target;
end; { ConvertUCS2toUTF7 }
function ConvertUTF7toUCS2(var sourceStart: PAnsiChar; sourceEnd: PAnsiChar;
var targetStart: PWideChar; targetEnd: PWideChar): Integer;
var
target: PWideChar { Register };
source: PAnsiChar { Register };
BITbuffer: Cardinal { & "Address Of" Used };
bufferbits: Integer { & "Address Of" Used };
shifted: Boolean { Used In Boolean Context };
first: Boolean { Used In Boolean Context };
wroteone: Boolean;
base64EOF: Boolean;
base64value: Integer;
done: Boolean;
c: UCS2;
prevc: UCS2;
junk: UCS2 { Used In Boolean Context };
begin
Initialize_UTF7_Data;
Result := 0;
BITbuffer := 0;
bufferbits := 0;
shifted := False;
first := False;
wroteone := False;
source := sourceStart;
target := targetStart;
c := 0;
if needtables then
tabinit;
repeat
{ read an ASCII character c }
done := Source >= SourceEnd;
if (not done) then
begin
c := Word(Source^);
Inc(Source);
end { If };
if shifted then
begin
{ We're done with a base64 string if we hit EOF, it's not a valid }
{ ASCII character, or it's not in the base64 set. }
{ }
base64value := invbase64[c];
base64EOF := (done or (c > $7F)) or (base64value < 0);
if base64EOF then
begin
shifted := False;
{ If the character causing us to drop out was SHIFT_IN or }
{ SHIFT_OUT, it may be a special escape for SHIFT_IN. The }
{ test for SHIFT_IN is not necessary, but allows an alternate }
{ form of UTF-7 where SHIFT_IN is escaped by SHIFT_IN. This }
{ only works for some values of SHIFT_IN. }
{ }
if ((not done) and ((c = Integer('+')) or (c = Integer('-')))) then
begin
{ get another character c }
prevc := c;
Done := Source >= SourceEnd;
if (not Done) then
begin
c := Word(Source^);
Inc(Source);
{ If no base64 characters were encountered, and the }
{ character terminating the shift sequence was }
{ SHIFT_OUT, then it's a special escape for SHIFT_IN. }
{ }
end;
if first and (prevc = Integer('-')) then
begin
{ write SHIFT_IN unicode }
if (target >= targetEnd) then
begin
Result := 2;
break;
end { If };
Target^ := WideChar('+');
Inc(Target);
end
else
begin
if (not wroteone) then
begin
Result := 1;
end { If };
end { Else };
;
end { If }
else
begin
if (not wroteone) then
begin
Result := 1;
end { If };
end { Else };
end { If }
else
begin
{ Add another 6 bits of base64 to the bit buffer. }
WRITE_N_BITS(base64value, 6, BITbuffer,
bufferbits);
first := False;
end { Else };
{ Extract as many full 16 bit characters as possible from the }
{ bit buffer. }
{ }
while (bufferbits >= 16) and (target < targetEnd) do
begin
{ write a unicode }
Target^ := WideChar(READ_N_BITS(16, BITbuffer, bufferbits));
Inc(Target);
wroteone := True;
end { While };
if (bufferbits >= 16) then
begin
if (target >= targetEnd) then
begin
Result := 2;
Break;
end;
end { If };
if (base64EOF) then
begin
junk := READ_N_BITS(bufferbits, BITbuffer, bufferbits);
if (junk <> 0) then
begin
Result := 1;
end { If };
end { If };
end { If };
if (not shifted) and (not done) then
begin
if (c = Integer('+')) then
begin
shifted := True;
first := True;
wroteone := False;
end { If }
else
begin
{ It must be a directly encoded character. }
if (c > $7F) then
begin
Result := 1;
end { If };
if (target >= targetEnd) then
begin
Result := 2;
break;
end { If };
Target^ := WideChar(c);
Inc(Target);
end { Else };
end { If };
until (done);
sourceStart := source;
targetStart := target;
end; { ConvertUTF7toUCS2 }
{*****************************************************************************}
{ Thanks to Francisco Leong for providing the Pascal conversion of }
{ ConvertUTF7.c (by David B. Goldsmith) }
{*****************************************************************************}
resourcestring
SBufferOverflow = 'Buffer overflow';
SInvalidUTF7 = 'Invalid UTF7';
function WideStringToUTF7(const W: WideString): AnsiString;
var
SourceStart, SourceEnd: PWideChar;
TargetStart, TargetEnd: PAnsiChar;
begin
if W = '' then
Result := ''
else
begin
SetLength(Result, Length(W) * 7); // Assume worst case
SourceStart := PWideChar(@W[1]);
SourceEnd := PWideChar(@W[Length(W)]) + 1;
TargetStart := PAnsiChar(@Result[1]);
TargetEnd := PAnsiChar(@Result[Length(Result)]) + 1;
if ConvertUCS2toUTF7(SourceStart, SourceEnd, TargetStart,
TargetEnd, True, False) <> 0
then
raise ETntInternalError.Create(SBufferOverflow);
SetLength(Result, TargetStart - PAnsiChar(@Result[1]));
end;
end;
function UTF7ToWideString(const S: AnsiString): WideString;
var
SourceStart, SourceEnd: PAnsiChar;
TargetStart, TargetEnd: PWideChar;
begin
if (S = '') then
Result := ''
else
begin
SetLength(Result, Length(S)); // Assume Worst case
SourceStart := PAnsiChar(@S[1]);
SourceEnd := PAnsiChar(@S[Length(S)]) + 1;
TargetStart := PWideChar(@Result[1]);
TargetEnd := PWideChar(@Result[Length(Result)]) + 1;
case ConvertUTF7toUCS2(SourceStart, SourceEnd, TargetStart,
TargetEnd) of
1: raise ETntGeneralError.Create(SInvalidUTF7);
2: raise ETntInternalError.Create(SBufferOverflow);
end;
SetLength(Result, TargetStart - PWideChar(@Result[1]));
end;
end;
function StringToWideStringEx(const S: AnsiString; CodePage: Cardinal): WideString;
var
InputLength,
OutputLength: Integer;
begin
if CodePage = CP_UTF7 then
Result := UTF7ToWideString(S) // CP_UTF7 not supported on Windows 95
else if CodePage = CP_UTF8 then
Result := UTF8ToWideString(S) // CP_UTF8 not supported on Windows 95
else begin
InputLength := Length(S);
OutputLength := MultiByteToWideChar(CodePage, 0, PAnsiChar(S), InputLength, nil, 0);
SetLength(Result, OutputLength);
MultiByteToWideChar(CodePage, 0, PAnsiChar(S), InputLength, PWideChar(Result), OutputLength);
end;
end;
function WideStringToStringEx(const WS: WideString; CodePage: Cardinal): AnsiString;
var
InputLength,
OutputLength: Integer;
begin
if CodePage = CP_UTF7 then
Result := WideStringToUTF7(WS) // CP_UTF7 not supported on Windows 95
else if CodePage = CP_UTF8 then
Result := WideStringToUTF8(WS) // CP_UTF8 not supported on Windows 95
else begin
InputLength := Length(WS);
OutputLength := WideCharToMultiByte(CodePage, 0, PWideChar(WS), InputLength, nil, 0, nil, nil);
SetLength(Result, OutputLength);
WideCharToMultiByte(CodePage, 0, PWideChar(WS), InputLength, PAnsiChar(Result), OutputLength, nil, nil);
end;
end;
function UCS2ToWideString(const Value: AnsiString): WideString;
begin
if Length(Value) = 0 then
Result := ''
else
SetString(Result, PWideChar(@Value[1]), Length(Value) div SizeOf(WideChar))
end;
function WideStringToUCS2(const Value: WideString): AnsiString;
begin
if Length(Value) = 0 then
Result := ''
else
SetString(Result, PAnsiChar(@Value[1]), Length(Value) * SizeOf(WideChar))
end;
{ Windows.pas doesn't declare TranslateCharsetInfo() correctly. }
function TranslateCharsetInfo(lpSrc: PDWORD; var lpCs: TCharsetInfo; dwFlags: DWORD): BOOL; stdcall; external gdi32 name 'TranslateCharsetInfo';
function CharSetToCodePage(ciCharset: UINT): Cardinal;
var
C: TCharsetInfo;
begin
Win32Check(TranslateCharsetInfo(PDWORD(ciCharset), C, TCI_SRCCHARSET));
Result := C.ciACP
end;
function LCIDToCodePage(ALcid: LCID): Cardinal;
var
Buf: array[0..6] of AnsiChar;
begin
GetLocaleInfo(ALcid, LOCALE_IDefaultAnsiCodePage, Buf, 6);
Result := StrToIntDef(Buf, GetACP);
end;
function KeyboardCodePage: Cardinal;
begin
Result := LCIDToCodePage(GetKeyboardLayout(0) and $FFFF);
end;
function KeyUnicode(CharCode: Word): WideChar;
var
AChar: AnsiChar;
begin
// converts the given character (as it comes with a WM_CHAR message) into its
// corresponding Unicode character depending on the active keyboard layout
if CharCode <= Word(High(AnsiChar)) then begin
AChar := AnsiChar(CharCode);
MultiByteToWideChar(KeyboardCodePage, MB_USEGLYPHCHARS, @AChar, 1, @Result, 1);
end else
Result := WideChar(CharCode);
end;
procedure StrSwapByteOrder(Str: PWideChar);
var
P: PWord;
begin
P := PWord(Str);
While (P^ <> 0) do begin
P^ := MakeWord(HiByte(P^), LoByte(P^));
Inc(P);
end;
end;
//--------------------------------------------------------------------
// LoadResString()
//
// This system function is used to retrieve a resourcestring and
// return the result as an AnsiString. If we believe that the result
// is only a temporary value, and that it will be immediately
// assigned to a WideString or a Variant, then we will save the
// Unicode result as well as a reference to the original Ansi string.
// WStrFromPCharLen() or VarFromLStr() will return this saved
// Unicode string if it appears to receive the most recent result
// of LoadResString.
//--------------------------------------------------------------------
//===========================================================================================
//
// function CodeMatchesPatternForUnicode(...);
//
// GIVEN: SomeWideString := SSomeResString; { WideString := resourcestring }
//
// Delphi will compile this statement into the following:
// -------------------------------------------------
// TempAnsiString := LoadResString(@SSomeResString);
// LINE 1: lea edx,[SomeTempAnsiString]
// LINE 2: mov eax,[@SomeResString]
// LINE 3: call LoadResString
//
// WStrFromLStr(SomeWideString, TempAnsiString); { SomeWideString := TempAnsiString }
// LINE 4: mov edx,[SomeTempAnsiString]
// LINE 5: mov/lea eax [@SomeWideString]
// LINE 6: call @WStrFromLStr
// -------------------------------------------------
//
// The order in which the parameters are prepared for WStrFromLStr (ie LINE 4 & 5) is
// reversed when assigning a non-temporary AnsiString to a WideString.
//
// This code, for example, results in LINE 4 and LINE 5 being swapped.
//
// SomeAnsiString := SSomeResString;
// SomeWideString := SomeAnsiString;
//
// Since we know the "signature" used by the compiler, we can detect this pattern.
// If we believe it is only temporary, we can save the Unicode results for later
// retrieval from WStrFromLStr.
//
// One final note: When assigning a resourcestring to a Variant, the same patterns exist.
//===========================================================================================
function CodeMatchesPatternForUnicode(PLine4: PAnsiChar): Boolean;
const
SIZEOF_OPCODE = 1 {byte};
MOV_16_OPCODE = AnsiChar($8B); { we'll assume operand size is 16 bits }
MOV_32_OPCODE = AnsiChar($B8); { we'll assume operand size is 32 bits }
LEA_OPCODE = AnsiChar($8D); { operand size can be 16 or 40 bits }
CALL_OPCODE = AnsiChar($E8); { assumed operand size is 32 bits }
BREAK_OPCODE = AnsiChar($CC); {in a breakpoint}
var
PLine1: PAnsiChar;
PLine2: PAnsiChar;
PLine3: PAnsiChar;
DataSize: Integer; // bytes in first LEA operand
begin
Result := False;
PLine3 := PLine4 - SizeOf(CALL_OPCODE) - 4;
PLine2 := PLine3 - SizeOf(MOV_32_OPCODE) - 4;
// figure PLine1 and operand size
DataSize := 2; { try 16 bit operand for line 1 }
PLine1 := PLine2 - DataSize - SizeOf(LEA_OPCODE);
if (PLine1^ <> LEA_OPCODE) and (not (IsDebugging and (PLine1^ = BREAK_OPCODE))) then
begin
DataSize := 5; { try 40 bit operand for line 1 }
PLine1 := PLine2 - DataSize - SizeOf(LEA_OPCODE);
end;
if (PLine1^ = LEA_OPCODE) or (IsDebugging and (PLine1^ = BREAK_OPCODE)) then
begin
if CompareMem(PLine1 + SIZEOF_OPCODE, PLine4 + SIZEOF_OPCODE, DataSize) then
begin
// After this check, it seems to match the WideString <- (temp) AnsiString pattern
Result := True; // It is probably OK. (The side effects of being wrong aren't very bad.)
end;
end;
end;
threadvar
PLastResString: PAnsiChar;
LastResStringValue: AnsiString;
LastWideResString: WideString;
procedure FreeTntSystemThreadVars;
begin
LastResStringValue := '';
LastWideResString := '';
end;
procedure Custom_System_EndThread(ExitCode: Integer);
begin
FreeTntSystemThreadVars;
{$IFDEF COMPILER_10_UP}
if Assigned(SystemThreadEndProc) then
SystemThreadEndProc(ExitCode);
{$ENDIF}
ExitThread(ExitCode);
end;
function Custom_System_LoadResString(ResStringRec: PResStringRec): AnsiString;
var
ReturnAddr: Pointer;
begin
// get return address
asm
PUSH ECX
MOV ECX, [EBP + 4]
MOV ReturnAddr, ECX
POP ECX
end;
// check calling code pattern
if CodeMatchesPatternForUnicode(ReturnAddr) then begin
// result will probably be assigned to an intermediate AnsiString
// on its way to either a WideString or Variant.
LastWideResString := WideLoadResString(ResStringRec);
Result := LastWideResString;
LastResStringValue := Result;
if Result = '' then
PLastResString := nil
else
PLastResString := PAnsiChar(Result);
end else begin
// result will probably be assigned to an actual AnsiString variable.
PLastResString := nil;
Result := WideLoadResString(ResStringRec);
end;
end;
//--------------------------------------------------------------------
// WStrFromPCharLen()
//
// This system function is used to assign an AnsiString to a WideString.
// It has been modified to assign Unicode results from LoadResString.
// Another purpose of this function is to specify the code page.
//--------------------------------------------------------------------
procedure Custom_System_WStrFromPCharLen(var Dest: WideString; Source: PAnsiChar; Length: Integer);
var
DestLen: Integer;
Buffer: array[0..2047] of WideChar;
Local_PLastResString: Pointer;
begin
Local_PLastResString := PLastResString;
if (Local_PLastResString <> nil)
and (Local_PLastResString = Source)
and (System.Length(LastResStringValue) = Length)
and (LastResStringValue = Source) then begin
// use last unicode resource string
PLastResString := nil; { clear for further use }
Dest := LastWideResString;
end else begin
if Local_PLastResString <> nil then
PLastResString := nil; { clear for further use }
if Length <= 0 then
begin
Dest := '';
Exit;
end;
if Length + 1 < High(Buffer) then
begin
DestLen := MultiByteToWideChar(DefaultSystemCodePage, 0, Source, Length, Buffer,
High(Buffer));
if DestLen > 0 then
begin
SetLength(Dest, DestLen);
Move(Pointer(@Buffer[0])^, Pointer(Dest)^, DestLen * SizeOf(WideChar));
Exit;
end;
end;
DestLen := (Length + 1);
SetLength(Dest, DestLen); // overallocate, trim later
DestLen := MultiByteToWideChar(DefaultSystemCodePage, 0, Source, Length, Pointer(Dest),
DestLen);
if DestLen < 0 then
DestLen := 0;
SetLength(Dest, DestLen);
end;
end;
{$IFNDEF COMPILER_9_UP}
//--------------------------------------------------------------------
// LStrFromPWCharLen()
//
// This system function is used to assign an WideString to an AnsiString.
// It has not been modified from its original purpose other than to specify the code page.
//--------------------------------------------------------------------
procedure Custom_System_LStrFromPWCharLen(var Dest: AnsiString; Source: PWideChar; Length: Integer);
var
DestLen: Integer;
Buffer: array[0..4095] of AnsiChar;
begin
if Length <= 0 then
begin
Dest := '';
Exit;
end;
if Length + 1 < (High(Buffer) div sizeof(WideChar)) then
begin
DestLen := WideCharToMultiByte(DefaultSystemCodePage, 0, Source,
Length, Buffer, High(Buffer),
nil, nil);
if DestLen >= 0 then
begin
SetLength(Dest, DestLen);
Move(Pointer(@Buffer[0])^, PAnsiChar(Dest)^, DestLen);
Exit;
end;
end;
DestLen := (Length + 1) * sizeof(WideChar);
SetLength(Dest, DestLen); // overallocate, trim later
DestLen := WideCharToMultiByte(DefaultSystemCodePage, 0, Source, Length, Pointer(Dest), DestLen,
nil, nil);
if DestLen < 0 then
DestLen := 0;
SetLength(Dest, DestLen);
end;
//--------------------------------------------------------------------
// WStrToString()
//
// This system function is used to assign an WideString to an short string.
// It has not been modified from its original purpose other than to specify the code page.
//--------------------------------------------------------------------
procedure Custom_System_WStrToString(Dest: PShortString; const Source: WideString; MaxLen: Integer);
var
SourceLen, DestLen: Integer;
Buffer: array[0..511] of AnsiChar;
begin
if MaxLen > 255 then MaxLen := 255;
SourceLen := Length(Source);
if SourceLen >= MaxLen then SourceLen := MaxLen;
if SourceLen = 0 then
DestLen := 0
else begin
DestLen := WideCharToMultiByte(DefaultSystemCodePage, 0, Pointer(Source), SourceLen,
Buffer, SizeOf(Buffer), nil, nil);
if DestLen > MaxLen then DestLen := MaxLen;
end;
Dest^[0] := Chr(DestLen);
if DestLen > 0 then Move(Buffer, Dest^[1], DestLen);
end;
{$ENDIF}
//--------------------------------------------------------------------
// VarFromLStr()
//
// This system function is used to assign an AnsiString to a Variant.
// It has been modified to assign Unicode results from LoadResString.
//--------------------------------------------------------------------
procedure Custom_System_VarFromLStr(var V: TVarData; const Value: AnsiString);
const
varDeepData = $BFE8;
var
Local_PLastResString: Pointer;
begin
if (V.VType and varDeepData) <> 0 then
VarClear(PVariant(@V)^);
Local_PLastResString := PLastResString;
if (Local_PLastResString <> nil)
and (Local_PLastResString = PAnsiChar(Value))
and (LastResStringValue = Value) then begin
// use last unicode resource string
PLastResString := nil; { clear for further use }
V.VOleStr := nil;
V.VType := varOleStr;
WideString(Pointer(V.VOleStr)) := Copy(LastWideResString, 1, MaxInt);
end else begin
if Local_PLastResString <> nil then
PLastResString := nil; { clear for further use }
V.VString := nil;
V.VType := varString;
AnsiString(V.VString) := Value;
end;
end;
{$IFNDEF COMPILER_9_UP}
//--------------------------------------------------------------------
// WStrCat3() A := B + C;
//
// This system function is used to concatenate two strings into one result.
// This function is added because A := '' + '' doesn't necessarily result in A = '';
//--------------------------------------------------------------------
procedure Custom_System_WStrCat3(var Dest: WideString; const Source1, Source2: WideString);
function NewWideString(CharLength: Longint): Pointer;
var
_NewWideString: function(CharLength: Longint): Pointer;
begin
asm
PUSH ECX
MOV ECX, offset System.@NewWideString;
MOV _NewWideString, ECX
POP ECX
end;
Result := _NewWideString(CharLength);
end;
procedure WStrSet(var S: WideString; P: PWideChar);
var
Temp: Pointer;
begin
Temp := Pointer(InterlockedExchange(Integer(S), Integer(P)));
if Temp <> nil then
WideString(Temp) := '';
end;
var
Source1Len, Source2Len: Integer;
NewStr: PWideChar;
begin
Source1Len := Length(Source1);
Source2Len := Length(Source2);
if (Source1Len <> 0) or (Source2Len <> 0) then
begin
NewStr := NewWideString(Source1Len + Source2Len);
Move(Pointer(Source1)^, Pointer(NewStr)^, Source1Len * sizeof(WideChar));
Move(Pointer(Source2)^, NewStr[Source1Len], Source2Len * sizeof(WideChar));
WStrSet(Dest, NewStr);
end else
Dest := '';
end;
{$ENDIF}
//--------------------------------------------------------------------
// System proc replacements
//--------------------------------------------------------------------
type
POverwrittenData = ^TOverwrittenData;
TOverwrittenData = record
Location: Pointer;
OldCode: array[0..6] of Byte;
end;
procedure OverwriteProcedure(OldProcedure, NewProcedure: pointer; Data: POverwrittenData = nil);
{ OverwriteProcedure originally from Igor Siticov }
{ Modified by Jacques Garcia Vazquez }
var
x: PAnsiChar;
y: integer;
ov2, ov: cardinal;
p: pointer;
begin
if Assigned(Data) and (Data.Location <> nil) then
exit; { procedure already overwritten }
// need six bytes in place of 5
x := PAnsiChar(OldProcedure);
if not VirtualProtect(Pointer(x), 6, PAGE_EXECUTE_READWRITE, @ov) then
RaiseLastOSError;
// if a jump is present then a redirect is found
// $FF25 = jmp dword ptr [xxx]
// This redirect is normally present in bpl files, but not in exe files
p := OldProcedure;
if Word(p^) = $25FF then
begin
Inc(Integer(p), 2); // skip the jump
// get the jump address p^ and dereference it p^^
p := Pointer(Pointer(p^)^);
// release the memory
if not VirtualProtect(Pointer(x), 6, ov, @ov2) then
RaiseLastOSError;
// re protect the correct one
x := PAnsiChar(p);
if not VirtualProtect(Pointer(x), 6, PAGE_EXECUTE_READWRITE, @ov) then
RaiseLastOSError;
end;
if Assigned(Data) then
begin
Move(x^, Data.OldCode, 6);
{ Assign Location last so that Location <> nil only if OldCode is properly initialized. }
Data.Location := x;
end;
x[0] := AnsiChar($E9);
y := integer(NewProcedure) - integer(p) - 5;
x[1] := AnsiChar(y and 255);
x[2] := AnsiChar((y shr 8) and 255);
x[3] := AnsiChar((y shr 16) and 255);
x[4] := AnsiChar((y shr 24) and 255);
if not VirtualProtect(Pointer(x), 6, ov, @ov2) then
RaiseLastOSError;
end;
procedure RestoreProcedure(OriginalProc: Pointer; Data: TOverwrittenData);
var
ov, ov2: Cardinal;
begin
if Data.Location <> nil then begin
if not VirtualProtect(Data.Location, 6, PAGE_EXECUTE_READWRITE, @ov) then
RaiseLastOSError;
Move(Data.OldCode, Data.Location^, 6);
if not VirtualProtect(Data.Location, 6, ov, @ov2) then
RaiseLastOSError;
end;
end;
function Addr_System_EndThread: Pointer;
begin
Result := @System.EndThread;
end;
function Addr_System_LoadResString: Pointer;
begin
Result := @System.LoadResString{TNT-ALLOW LoadResString};
end;
function Addr_System_WStrFromPCharLen: Pointer;
asm
mov eax, offset System.@WStrFromPCharLen;
end;
{$IFNDEF COMPILER_9_UP}
function Addr_System_LStrFromPWCharLen: Pointer;
asm
mov eax, offset System.@LStrFromPWCharLen;
end;
function Addr_System_WStrToString: Pointer;
asm
mov eax, offset System.@WStrToString;
end;
{$ENDIF}
function Addr_System_VarFromLStr: Pointer;
asm
mov eax, offset System.@VarFromLStr;
end;
function Addr_System_WStrCat3: Pointer;
asm
mov eax, offset System.@WStrCat3;
end;
var
System_EndThread_Code,
System_LoadResString_Code,
System_WStrFromPCharLen_Code,
{$IFNDEF COMPILER_9_UP}
System_LStrFromPWCharLen_Code,
System_WStrToString_Code,
{$ENDIF}
System_VarFromLStr_Code
{$IFNDEF COMPILER_9_UP}
,
System_WStrCat3_Code,
SysUtils_WideFmtStr_Code
{$ENDIF}
: TOverwrittenData;
procedure InstallEndThreadOverride;
begin
OverwriteProcedure(Addr_System_EndThread, @Custom_System_EndThread, @System_EndThread_Code);
end;
procedure InstallStringConversionOverrides;
begin
OverwriteProcedure(Addr_System_WStrFromPCharLen, @Custom_System_WStrFromPCharLen, @System_WStrFromPCharLen_Code);
{$IFNDEF COMPILER_9_UP}
OverwriteProcedure(Addr_System_LStrFromPWCharLen, @Custom_System_LStrFromPWCharLen, @System_LStrFromPWCharLen_Code);
OverwriteProcedure(Addr_System_WStrToString, @Custom_System_WStrToString, @System_WStrToString_Code);
{$ENDIF}
end;
procedure InstallWideResourceStrings;
begin
OverwriteProcedure(Addr_System_LoadResString, @Custom_System_LoadResString, @System_LoadResString_Code);
OverwriteProcedure(Addr_System_VarFromLStr, @Custom_System_VarFromLStr, @System_VarFromLStr_Code);
end;
{$IFNDEF COMPILER_9_UP}
procedure InstallWideStringConcatenationFix;
begin
OverwriteProcedure(Addr_System_WStrCat3, @Custom_System_WStrCat3, @System_WStrCat3_Code);
end;
procedure InstallWideFormatFixes;
begin
OverwriteProcedure(@SysUtils.WideFmtStr, @TntSysUtils.Tnt_WideFmtStr, @SysUtils_WideFmtStr_Code);
end;
{$ENDIF}
procedure InstallTntSystemUpdates(Updates: TTntSystemUpdateSet = AllTntSystemUpdates);
begin
InstallEndThreadOverride;
if tsWideResourceStrings in Updates then begin
InstallStringConversionOverrides;
InstallWideResourceStrings;
end;
{$IFNDEF COMPILER_9_UP}
if tsFixImplicitCodePage in Updates then begin
InstallStringConversionOverrides;
{ CP_ACP is the code page used by the non-Unicode Windows API. }
GDefaultSystemCodePage := CP_ACP{TNT-ALLOW CP_ACP};
end;
if tsFixWideStrConcat in Updates then begin
InstallWideStringConcatenationFix;
end;
if tsFixWideFormat in Updates then begin
InstallWideFormatFixes;
end;
{$ENDIF}
end;
{$IFNDEF COMPILER_9_UP}
var
StartupDefaultUserCodePage: Cardinal;
{$ENDIF}
procedure UninstallSystemOverrides;
begin
RestoreProcedure(Addr_System_EndThread, System_EndThread_Code);
// String Conversion
RestoreProcedure(Addr_System_WStrFromPCharLen, System_WStrFromPCharLen_Code);
{$IFNDEF COMPILER_9_UP}
RestoreProcedure(Addr_System_LStrFromPWCharLen, System_LStrFromPWCharLen_Code);
RestoreProcedure(Addr_System_WStrToString, System_WStrToString_Code);
GDefaultSystemCodePage := StartupDefaultUserCodePage;
{$ENDIF}
// Wide resourcestring
RestoreProcedure(Addr_System_LoadResString, System_LoadResString_Code);
RestoreProcedure(Addr_System_VarFromLStr, System_VarFromLStr_Code);
{$IFNDEF COMPILER_9_UP}
// WideString concat fix
RestoreProcedure(Addr_System_WStrCat3, System_WStrCat3_Code);
// WideFormat fixes
RestoreProcedure(@SysUtils.WideFmtStr, SysUtils_WideFmtStr_Code);
{$ENDIF}
end;
initialization
{$IFDEF COMPILER_9_UP}
GDefaultSystemCodePage := GetACP;
{$ELSE}
{$IFDEF COMPILER_7_UP}
if (Win32Platform = VER_PLATFORM_WIN32_NT) and (Win32MajorVersion >= 5) then
GDefaultSystemCodePage := CP_THREAD_ACP // Win 2K/XP/...
else
GDefaultSystemCodePage := LCIDToCodePage(GetThreadLocale); // Win NT4/95/98/ME
{$ELSE}
GDefaultSystemCodePage := CP_ACP{TNT-ALLOW CP_ACP};
{$ENDIF}
{$ENDIF}
{$IFNDEF COMPILER_9_UP}
StartupDefaultUserCodePage := DefaultSystemCodePage;
{$ENDIF}
IsDebugging := DebugHook > 0;
finalization
UninstallSystemOverrides;
FreeTntSystemThreadVars; { Make MemorySleuth happy. }
end.
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