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DISystemCompat.pas
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DISystemCompat.pas
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{-------------------------------------------------------------------------------
Copyright (c) 1999-2012 Ralf Junker, The Delphi Inspiration
Internet: http://www.yunqa.de/delphi/
E-Mail: [email protected]
-------------------------------------------------------------------------------}
unit DISystemCompat;
interface
{$I DICompilers.inc}
{$IFDEF FPC}
type
RawByteString = AnsiString;
{$ELSE FPC}
{$IFNDEF COMPILER_6_UP}
uses
Windows;
{$ENDIF COMPILER_6_UP}
{$IFNDEF COMPILER_3_UP}
type
PByte = ^Byte;
{$ENDIF ~COMPILER_3_UP}
{$IFNDEF COMPILER_4_UP}
type
Int64 = packed record
i1, i2: Integer;
end;
PInt64 = ^Int64;
{$ENDIF ~COMPILER_4_UP}
{$IFNDEF COMPILER_5_UP}
procedure FreeAndNil(var Obj);
{$ENDIF ~COMPILER_5_UP}
{$IFNDEF COMPILER_6_UP}
type
TMethod = record
Code, Data: Pointer;
end;
PBoolean = ^Boolean;
PCardinal = ^Cardinal;
PDouble = ^Double;
PInteger = Windows.PInteger;
PPAnsiChar = ^PAnsiChar;
PPointer = ^Pointer;
PPWideChar = ^PWideChar;
PWord = ^Word;
PWordBool = ^WordBool;
Utf8String = type AnsiString;
PUtf8String = ^Utf8String;
IntegerArray = array[0..MaxInt div SizeOf(Integer) - 1] of Integer;
PIntegerArray = ^IntegerArray;
TPointerArray = array[0..MaxInt div SizeOf(Pointer) - 1] of Pointer;
PPointerArray = ^TPointerArray;
TIntegerDynArray = array of Integer;
TInt64DynArray = array of Int64;
function UnicodeToUtf8(
Dest: PAnsiChar;
Source: PWideChar;
MaxBytes: Integer): Integer; overload; {$IFDEF SUPPORTS_DEPRECATED}deprecated; {$ENDIF}
function UnicodeToUtf8(
Dest: PAnsiChar;
MaxDestBytes: Cardinal;
Source: PWideChar;
SourceChars: Cardinal): Cardinal; overload;
function Utf8Decode(const s: Utf8String): WideString; {$IFDEF SUPPORTS_DEPRECATED}deprecated; {$ENDIF}
function Utf8Encode(const WS: WideString): Utf8String;
function Utf8ToUnicode(
Dest: PWideChar;
Source: PChar;
MaxChars: Integer): Integer; overload; {$IFDEF SUPPORTS_DEPRECATED}deprecated; {$ENDIF}
function Utf8ToUnicode(
Dest: PWideChar;
MaxDestChars: Cardinal;
Source: PChar;
SourceBytes: Cardinal): Cardinal; overload;
{$ENDIF ~COMPILER_6_UP}
{$IFNDEF COMPILER_12_UP}
type
NativeInt = Integer;
RawByteString = AnsiString;
PRawByteString = ^RawByteString;
UnicodeString = WideString;
PUnicodeString = ^UnicodeString;
function StringRefCount(const s: RawByteString): Integer; overload; {$IFDEF SUPPORTS_INLINE}inline; {$ENDIF}
function StringRefCount(const s: UnicodeString): Integer; overload; {$IFDEF SUPPORTS_INLINE}inline; {$ENDIF}
function Utf8ToString(const s: RawByteString): UnicodeString; {$IFDEF SUPPORTS_INLINE}inline; {$ENDIF}overload;
function Utf8ToString(const s: PAnsiChar): UnicodeString; {$IFDEF SUPPORTS_INLINE}inline; {$ENDIF}overload;
function UTF8ToUnicodeString(const s: RawByteString): UnicodeString; overload;
function UTF8ToUnicodeString(const s: PAnsiChar): UnicodeString; overload;
{$ENDIF ~COMPILER_12_UP}
{$IFNDEF COMPILER_14_UP}
type
NativeUInt = Cardinal;
{$ENDIF ~COMPILER_14_UP}
{$IFNDEF COMPILER_15_UP}
function IsRelativePath(
const Path: string): Boolean; {$IFDEF SUPPORTS_INLINE}inline; {$ENDIF}
function IsRelativePathA(
const Path: RawByteString): Boolean;
function IsRelativePathW(
const Path: UnicodeString): Boolean;
{$ENDIF ~COMPILER_15_UP}
{$ENDIF FPC}
type
TPAnsiCharArray = array[0..MaxInt div SizeOf(PAnsiChar) - 1] of PAnsiChar;
PPAnsiCharArray = ^TPAnsiCharArray;
PPPAnsiCharArray = ^PPAnsiCharArray;
PUtf8Char = PAnsiChar;
PPUtf8Char = ^PUtf8Char;
TPUtf8CharArray = array[0..MaxInt div SizeOf(PUtf8Char) - 1] of PUtf8Char;
PPUtf8CharArray = ^TPUtf8CharArray;
PPPUtf8CharArray = ^PPUtf8CharArray;
implementation
{$IFDEF FPC}
{$ELSE FPC}
{$IFNDEF COMPILER_5_UP}
procedure FreeAndNil(var Obj);
var
Temp: TObject;
begin
Temp := TObject(Obj);
Pointer(Obj) := nil;
Temp.Free;
end;
{$ENDIF ~COMPILER_5_UP}
{$IFNDEF COMPILER_6_UP}
function UnicodeToUtf8(Dest: PChar; Source: PWideChar; MaxBytes: Integer): Integer;
var
Len: Cardinal;
begin
Len := 0;
if Source <> nil then
while Source[Len] <> #0 do
Inc(Len);
Result := UnicodeToUtf8(Dest, MaxBytes, Source, Len);
end;
function UnicodeToUtf8(Dest: PAnsiChar; MaxDestBytes: Cardinal; Source: PWideChar; SourceChars: Cardinal): Cardinal;
var
i, Count: Cardinal;
c: Cardinal;
begin
Result := 0;
if Source = nil then Exit;
Count := 0;
i := 0;
if Dest <> nil then
begin
while (i < SourceChars) and (Count < MaxDestBytes) do
begin
c := Cardinal(Source[i]);
Inc(i);
if c <= $7F then
begin
Dest[Count] := Char(c);
Inc(Count);
end
else if c > $7FF then
begin
if Count + 3 > MaxDestBytes then
Break;
Dest[Count] := Char($E0 or (c shr 12));
Dest[Count + 1] := Char($80 or ((c shr 6) and $3F));
Dest[Count + 2] := Char($80 or (c and $3F));
Inc(Count, 3);
end
else
begin
if Count + 2 > MaxDestBytes then
Break;
Dest[Count] := Char($C0 or (c shr 6));
Dest[Count + 1] := Char($80 or (c and $3F));
Inc(Count, 2);
end;
end;
if Count >= MaxDestBytes then Count := MaxDestBytes - 1;
Dest[Count] := #0;
end
else
begin
while i < SourceChars do
begin
c := Integer(Source[i]);
Inc(i);
if c > $7F then
begin
if c > $7FF then
Inc(Count);
Inc(Count);
end;
Inc(Count);
end;
end;
Result := Count + 1;
end;
function Utf8Decode(const s: Utf8String): WideString;
var
l: Integer;
Temp: WideString;
begin
Result := '';
if s = '' then Exit;
SetLength(Temp, Length(s));
l := Utf8ToUnicode(PWideChar(Temp), Length(Temp) + 1, PChar(s), Length(s));
if l > 0 then
SetLength(Temp, l - 1)
else
Temp := '';
Result := Temp;
end;
function Utf8Encode(const WS: WideString): Utf8String;
var
l: Integer;
Temp: Utf8String;
begin
Result := '';
if WS = '' then Exit;
SetLength(Temp, Length(WS) * 3);
l := UnicodeToUtf8(PChar(Temp), Length(Temp) + 1, PWideChar(WS), Length(WS));
if l > 0 then
SetLength(Temp, l - 1)
else
Temp := '';
Result := Temp;
end;
function Utf8ToUnicode(Dest: PWideChar; Source: PChar; MaxChars: Integer): Integer;
var
Len: Cardinal;
begin
Len := 0;
if Source <> nil then
while Source[Len] <> #0 do
Inc(Len);
Result := Utf8ToUnicode(Dest, MaxChars, Source, Len);
end;
function Utf8ToUnicode(Dest: PWideChar; MaxDestChars: Cardinal; Source: PChar; SourceBytes: Cardinal): Cardinal;
var
i, Count: Cardinal;
c: Byte;
wc: Cardinal;
begin
if Source = nil then
begin
Result := 0;
Exit;
end;
Result := Cardinal(-1);
Count := 0;
i := 0;
if Dest <> nil then
begin
while (i < SourceBytes) and (Count < MaxDestChars) do
begin
wc := Cardinal(Source[i]);
Inc(i);
if (wc and $80) <> 0 then
begin
if i >= SourceBytes then Exit;
wc := wc and $3F;
if (wc and $20) <> 0 then
begin
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit;
if i >= SourceBytes then Exit;
wc := (wc shl 6) or (c and $3F);
end;
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit;
Dest[Count] := WideChar((wc shl 6) or (c and $3F));
end
else
Dest[Count] := WideChar(wc);
Inc(Count);
end;
if Count >= MaxDestChars then Count := MaxDestChars - 1;
Dest[Count] := #0;
end
else
begin
while (i < SourceBytes) do
begin
c := Byte(Source[i]);
Inc(i);
if (c and $80) <> 0 then
begin
if i >= SourceBytes then Exit;
c := c and $3F;
if (c and $20) <> 0 then
begin
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit;
if i >= SourceBytes then Exit;
end;
c := Byte(Source[i]);
Inc(i);
if (c and $C0) <> $80 then Exit;
end;
Inc(Count);
end;
end;
Result := Count + 1;
end;
{$ENDIF ~COMPILER_6_UP}
{$IFNDEF COMPILER_12_UP}
function StringRefCount(const s: RawByteString): Integer;
begin
Result := Integer(s);
if Result <> 0 then
Result := PInteger(Result - 8)^;
end;
function StringRefCount(const s: UnicodeString): Integer;
begin
Result := Integer(s);
if Result <> 0 then
Result := PInteger(Result - 8)^;
end;
function Utf8ToString(const s: RawByteString): UnicodeString;
begin
Result := UTF8ToUnicodeString(s);
end;
function Utf8ToString(const s: PAnsiChar): UnicodeString;
begin
Result := UTF8ToUnicodeString(s);
end;
function UTF8ToUnicodeString(const s: RawByteString): UnicodeString;
var
l: Cardinal;
begin
l := Length(s);
if l > 0 then
begin
SetString(Result, nil, l);
l := Utf8ToUnicode(Pointer(Result), l + 1, Pointer(s), l);
if l > 0 then
begin
SetLength(Result, l - 1);
Exit;
end;
end;
Result := '';
end;
function UTF8ToUnicodeString(const s: PAnsiChar): UnicodeString; overload;
var
l: Integer;
begin
l := 0;
if Assigned(s) then
while s[l] <> #0 do
Inc(l);
if l > 0 then
begin
SetString(Result, nil, l);
l := Utf8ToUnicode(Pointer(Result), l + 1, s, l);
if l > 0 then
begin
SetLength(Result, l - 1);
Exit;
end;
end;
Result := '';
end;
{$ENDIF ~COMPILER_12_UP}
{$IFNDEF COMPILER_15_UP}
function IsRelativePath(const Path: string): Boolean;
begin
Result := {$IFDEF UNICODE}IsRelativePathW{$ELSE}IsRelativePathA{$ENDIF}(Path);
end;
function IsRelativePathA(const Path: RawByteString): Boolean;
var
l: Integer;
begin
l := Length(Path);
Result := (l > 0) and (Path[1] <> '/')
{$IFDEF MSWINDOWS} and (l > 1) and (Path[2] <> ':'){$ENDIF MSWINDOWS};
end;
function IsRelativePathW(const Path: UnicodeString): Boolean;
var
l: Integer;
begin
l := Length(Path);
Result := (l > 0) and (Path[1] <> '/')
{$IFDEF MSWINDOWS} and (l > 1) and (Path[2] <> ':'){$ENDIF MSWINDOWS};
end;
{$ENDIF ~COMPILER_15_UP}
{$ENDIF FPC}
end.