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AnsiChar and WideChar implementation

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git-svn-id: https://svn.code.sf.net/p/lazarus-ccr/svn@1853 8e941d3f-bd1b-0410-a28a-d453659cc2b4
This commit is contained in:
inoussa 2011-08-29 02:44:55 +00:00
parent bdfc17f284
commit 6a2cfcfb33
1 changed files with 130 additions and 14 deletions
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144
wst/trunk/basex_encode.pas
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@ -32,19 +32,26 @@ type
function Base64Decode(const AInBuffer : string; const AOptions : TBaseXOptions) : TByteDynArray;overload;
function Base32Encode(const ALength : PtrInt; const AInBuffer) : string; overload;
function Base32Encode(const AInBuffer : TBinaryString) : string; overload;
function Base32Encode(const AInBuffer : TBinaryString) : string; overload;
function Base32Decode(const AInBuffer : string; const AOptions : TBaseXOptions) : TByteDynArray;
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PChar); overload;
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PAnsiChar); overload;
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PWideChar); overload;
function Base16Encode(const ABin; const ALen : Integer) : string; overload;
function Base16Encode(const AInBuffer : TBinaryString) : string;overload;
function Base16Decode(
const AHex : PChar;
const AHex : PAnsiChar;
var ABin;
const ABinLen : Integer;
const AOptions : TBaseXOptions = [xoDecodeIgnoreIllegalChar]
) : Integer;overload;
function Base16Decode(const AInBuffer : string; const AOptions : TBaseXOptions) : TByteDynArray;overload;
function Base16Decode(
const AHex : PWideChar;
var ABin;
const ABinLen : Integer;
const AOptions : TBaseXOptions = [xoDecodeIgnoreIllegalChar]
) : Integer;overload;
function Base16Decode(const AInBuffer : ansistring; const AOptions : TBaseXOptions) : TByteDynArray;overload;
implementation
@ -398,12 +405,12 @@ begin
end;
end;
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PChar);
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PAnsiChar);
const
HEX_MAP : array[0..15] of Char = '0123456789ABCDEF';
HEX_MAP : array[0..15] of AnsiChar = '0123456789ABCDEF';
var
p : PByte;
pres : PChar;
pres : PAnsiChar;
i : Integer;
begin
if ( ALen > 0 ) then begin
@ -411,7 +418,27 @@ begin
p := PByte(@Abin);
for i := 1 to ALen do begin
pres^ := HEX_MAP[p^ shr 4];
PChar(PtrUInt(pres) + SizeOf(Char))^ := HEX_MAP[p^ and $F];
PAnsiChar(PtrUInt(pres) + SizeOf(AnsiChar))^ := HEX_MAP[p^ and $F];
Inc(pres,2);
Inc(p);
end;
end;
end;
procedure Base16Encode(const ABin; const ALen : Integer; AOutBuffer : PWideChar);
const
HEX_MAP : array[0..15] of WideChar = ('0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F');
var
p : PByte;
pres : PWideChar;
i : Integer;
begin
if ( ALen > 0 ) then begin
pres := AOutBuffer;
p := PByte(@Abin);
for i := 1 to ALen do begin
pres^ := HEX_MAP[p^ shr 4];
PWideChar(PtrUInt(pres) + SizeOf(WideChar))^ := HEX_MAP[p^ and $F];
Inc(pres,2);
Inc(p);
end;
@ -422,7 +449,7 @@ function Base16Encode(const ABin; const ALen : Integer) : string;
begin
if ( ALen > 0 ) then begin
SetLength(Result,(2 * ALen));
Base16Encode(ABin,ALen,@Result[1]);
Base16Encode(ABin,ALen,PChar(@Result[1]));
end else begin
Result := '';
end;
@ -435,7 +462,7 @@ end;
// Returns the actual bytes count.
function Base16Decode(
const AHex : PChar;
const AHex : PAnsiChar;
var ABin;
const ABinLen : Integer;
const AOptions : TBaseXOptions = [xoDecodeIgnoreIllegalChar]
@ -446,7 +473,7 @@ const
ALPHA_LOW_MAP : array['a'..'f'] of Byte = ( 10, 11, 12, 13, 14, 15 );
var
i : Integer;
hp : PChar;
hp : PAnsiChar;
bp : PByte;
binVal : Byte;
locFailOnIllegalChar : Boolean;
@ -522,13 +549,102 @@ begin
end;
end;
function Base16Decode(const AInBuffer : string; const AOptions : TBaseXOptions) : TByteDynArray;
// Returns the actual bytes count.
function Base16Decode(
const AHex : PWideChar;
var ABin;
const ABinLen : Integer;
const AOptions : TBaseXOptions = [xoDecodeIgnoreIllegalChar]
) : Integer;
const
DIGIT_MAP : array['0'..'9'] of Byte = ( 0, 1, 2, 3, 4, 5, 6, 7, 8, 9);
ALPHA_UP_MAP : array['A'..'F'] of Byte = ( 10, 11, 12, 13, 14, 15 );
ALPHA_LOW_MAP : array['a'..'f'] of Byte = ( 10, 11, 12, 13, 14, 15 );
var
i : Integer;
hp : PWideChar;
bp : PByte;
binVal : Byte;
locFailOnIllegalChar : Boolean;
begin
Result := 0;
if ( ABinLen > 0 ) then begin
binVal := 0;
bp := PByte(@Abin);
hp := AHex;
locFailOnIllegalChar := not ( xoDecodeIgnoreIllegalChar in AOptions );
for i := 0 to Pred(ABinLen) do begin
if ( hp^ = #0 ) then
Break;
while ( hp^ <> #0 ) do begin
case hp^ of
'0'..'9' :
begin
binVal := ( DIGIT_MAP[AnsiChar(hp^)] shl 4);
Break;
end;
'A'..'Z' :
begin
binVal := ( ALPHA_UP_MAP[AnsiChar(hp^)] shl 4);
Break;
end;
'a'..'z' :
begin
binVal := ( ALPHA_LOW_MAP[AnsiChar(hp^)] shl 4);
Break;
end;
else
begin
if locFailOnIllegalChar then
raise EBase16Exception.Create(SERR_UnexpectedEndOfData);
end;
end;
Inc(hp);
end;
if ( hp^ = #0 ) then
raise EBase16Exception.Create(SERR_UnexpectedEndOfData);
Inc(hp);
while ( hp^ <> #0 ) do begin
case hp^ of
'0'..'9' :
begin
bp^ := binVal or DIGIT_MAP[AnsiChar(hp^)];
Break;
end;
'A'..'Z' :
begin
bp^ := binVal or ALPHA_UP_MAP[AnsiChar(hp^)];
Break;
end;
'a'..'z' :
begin
bp^ := binVal or ALPHA_LOW_MAP[AnsiChar(hp^)];
Break;
end;
else
begin
if locFailOnIllegalChar then
raise EBase16Exception.CreateFmt(SERR_IllegalChar,[hp^]);
end;
end;
Inc(hp);
end;
if ( hp^ = #0 ) then
raise EBase16Exception.Create(SERR_UnexpectedEndOfData);
Inc(hp);
Inc(bp);
end;
Result := PtrUInt(bp) - PtrUInt(@Abin);
end;
end;
function Base16Decode(const AInBuffer : ansistring; const AOptions : TBaseXOptions) : TByteDynArray;
var
i : Integer;
begin
if ( Length(AInBuffer) > 0 ) then begin
SetLength(Result,Length(AInBuffer) div 2);
i := Base16Decode(PChar(AInBuffer),Result[0],Length(Result),AOptions);
i := Base16Decode(PAnsiChar(AInBuffer),Result[0],Length(Result),AOptions);
if ( i <> Length(Result) ) then
SetLength(Result,i);
end;