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Last change
on this file was 97, checked in by chronos, 2 years ago |
- Fixed: Quoted-printable encoded text was not handled correctly for multiple lines.
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File size:
1.9 KB
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| 1 | unit UQuotedPrintable;
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| 2 |
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| 3 | {$mode delphi}
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| 4 |
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| 5 | interface
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| 6 |
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| 7 | uses
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| 8 | Classes, SysUtils;
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| 9 |
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| 10 | function DecodeQuotedPrintable(Text: string; IgnoreErrors: Boolean = False): string;
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| 11 | function EncodeQuotedPrintable(Text: string; EncodeSpaces: Boolean = False): string;
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| 12 |
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| 13 | const
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| 14 | QuotedPrintableEscapeCharacter = '=';
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| 15 |
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| 16 | implementation
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| 17 |
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| 18 | uses
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| 19 | UCommon;
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| 20 |
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| 21 | resourcestring
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| 22 | SDecodeError = 'Decode error';
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| 23 |
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| 24 | function DecodeQuotedPrintable(Text: string; IgnoreErrors: Boolean = False): string;
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| 25 | var
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| 26 | I: Integer;
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| 27 | J: Integer;
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| 28 | C: Char;
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| 29 | IntValue: Integer;
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| 30 | begin
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| 31 | Result := '';
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| 32 | SetLength(Result, Length(Text));
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| 33 | I := 1;
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| 34 | J := 1;
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| 35 | while I <= Length(Text) do begin
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| 36 | C := Text[I];
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| 37 | if C = QuotedPrintableEscapeCharacter then begin
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| 38 | if ((I + 2) <= Length(Text)) and TryHexToInt(Text[I + 1] + Text[I + 2], IntValue) then begin
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| 39 | Result[J] := Chr(IntValue);
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| 40 | Inc(I, 2);
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| 41 | Inc(J);
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| 42 | SetLength(Result, Length(Result) - 2);
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| 43 | end else begin
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| 44 | if not IgnoreErrors then raise Exception.Create(SDecodeError)
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| 45 | else begin
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| 46 | Result[J] := '?';
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| 47 | Inc(J);
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| 48 | end;
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| 49 | end;
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| 50 | end else begin
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| 51 | Result[J] := C;
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| 52 | Inc(J);
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| 53 | end;
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| 54 | Inc(I);
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| 55 | end;
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| 56 | end;
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| 57 |
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| 58 | function EncodeQuotedPrintable(Text: string; EncodeSpaces: Boolean): string;
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| 59 | var
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| 60 | I: Integer;
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| 61 | J: Integer;
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| 62 | C: Char;
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| 63 | LowerLimit: Char;
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| 64 | const
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| 65 | HexDigits : array[0..$F] of AnsiChar = '0123456789ABCDEF';
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| 66 | begin
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| 67 | if EncodeSpaces then LowerLimit := #33
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| 68 | else LowerLimit := #32;
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| 69 | Result := '';
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| 70 | SetLength(Result, Length(Text));
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| 71 | I := 1;
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| 72 | J := 1;
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| 73 | while I <= Length(Text) do begin
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| 74 | C := Text[I];
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| 75 | if (C = QuotedPrintableEscapeCharacter) or (C < LowerLimit) or (C > #126) then begin
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| 76 | SetLength(Result, Length(Result) + 2);
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| 77 | Result[J] := QuotedPrintableEscapeCharacter;
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| 78 | Result[J + 1] := HexDigits[Ord(C) shr 4];
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| 79 | Result[J + 2] := HexDigits[Ord(C) and $f];
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| 80 | Inc(J, 3);
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| 81 | end else begin
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| 82 | Result[J] := C;
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| 83 | Inc(J);
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| 84 | end;
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| 85 | Inc(I);
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| 86 | end;
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| 87 | end;
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| 88 |
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| 89 | end.
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| 90 |
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