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Last change
on this file was 148, checked in by chronos, 3 years ago |
- Modified: Update Common and VCard package. Remove U prefix from unit names.
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File size:
1.9 KB
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| 1 | unit QuotedPrintable;
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| 2 |
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| 3 | interface
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| 4 |
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| 5 | uses
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| 6 | Classes, SysUtils;
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| 7 |
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| 8 | function DecodeQuotedPrintable(Text: string; IgnoreErrors: Boolean = False): string;
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| 9 | function EncodeQuotedPrintable(Text: string; EncodeSpaces: Boolean = False): string;
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| 10 |
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| 11 | const
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| 12 | QuotedPrintableEscapeCharacter = '=';
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| 13 |
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| 14 | implementation
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| 15 |
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| 16 | uses
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| 17 | Common;
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| 18 |
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| 19 | resourcestring
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| 20 | SDecodeError = 'Decode error';
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| 21 |
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| 22 | function DecodeQuotedPrintable(Text: string; IgnoreErrors: Boolean = False): string;
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| 23 | var
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| 24 | I: Integer;
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| 25 | J: Integer;
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| 26 | C: Char;
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| 27 | IntValue: Integer;
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| 28 | begin
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| 29 | Result := '';
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| 30 | SetLength(Result, Length(Text));
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| 31 | I := 1;
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| 32 | J := 1;
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| 33 | while I <= Length(Text) do begin
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| 34 | C := Text[I];
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| 35 | if C = QuotedPrintableEscapeCharacter then begin
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| 36 | if ((I + 2) <= Length(Text)) and TryHexToInt(Text[I + 1] + Text[I + 2], IntValue) then begin
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| 37 | Result[J] := Chr(IntValue);
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| 38 | Inc(I, 2);
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| 39 | Inc(J);
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| 40 | SetLength(Result, Length(Result) - 2);
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| 41 | end else begin
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| 42 | if not IgnoreErrors then raise Exception.Create(SDecodeError)
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| 43 | else begin
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| 44 | Result[J] := '?';
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| 45 | Inc(J);
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| 46 | end;
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| 47 | end;
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| 48 | end else begin
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| 49 | Result[J] := C;
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| 50 | Inc(J);
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| 51 | end;
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| 52 | Inc(I);
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| 53 | end;
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| 54 | end;
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| 55 |
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| 56 | function EncodeQuotedPrintable(Text: string; EncodeSpaces: Boolean): string;
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| 57 | var
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| 58 | I: Integer;
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| 59 | J: Integer;
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| 60 | C: Char;
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| 61 | LowerLimit: Char;
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| 62 | const
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| 63 | HexDigits : array[0..$F] of AnsiChar = '0123456789ABCDEF';
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| 64 | begin
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| 65 | if EncodeSpaces then LowerLimit := #33
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| 66 | else LowerLimit := #32;
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| 67 | Result := '';
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| 68 | SetLength(Result, Length(Text));
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| 69 | I := 1;
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| 70 | J := 1;
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| 71 | while I <= Length(Text) do begin
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| 72 | C := Text[I];
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| 73 | if (C = QuotedPrintableEscapeCharacter) or (C < LowerLimit) or (C > #126) then begin
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| 74 | SetLength(Result, Length(Result) + 2);
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| 75 | Result[J] := QuotedPrintableEscapeCharacter;
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| 76 | Result[J + 1] := HexDigits[Ord(C) shr 4];
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| 77 | Result[J + 2] := HexDigits[Ord(C) and $f];
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| 78 | Inc(J, 3);
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| 79 | end else begin
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| 80 | Result[J] := C;
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| 81 | Inc(J);
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| 82 | end;
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| 83 | Inc(I);
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| 84 | end;
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| 85 | end;
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| 86 |
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| 87 | end.
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| 88 |
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