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unit IBCodePage;
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{$mode objfpc}{$H+}
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{$IF FPC_FULLVERSION >= 20700 }
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{$codepage UTF8}
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{$DEFINE HAS_ANSISTRING_CODEPAGE}
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{$ENDIF}
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interface
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uses
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Classes, SysUtils;
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type
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TFirebirdCharacterSets = class
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public
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class function GetCharsetName(CharSetID: integer): string;
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{$IFDEF HAS_ANSISTRING_CODEPAGE}
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class function CharSetID2CodePage(CharSetID: integer; var CodePage: TSystemCodePage): boolean;
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class function CodePage2CharSetID(CodePage: TSystemCodePage; var CharSetID: integer): boolean;
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{$ENDIF}
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class function CharSetName2CharSetID(CharSetName: string; var CharSetID: integer): boolean;
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class function CharSetWidth(CharSetID: integer; var Width: integer): boolean;
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end;
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implementation
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type
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TCharsetMap = record
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CharsetID: integer;
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CharSetName: string;
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CharSetWidth: integer;
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{$IFDEF HAS_ANSISTRING_CODEPAGE}
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CodePage: TSystemCodePage;
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{$ELSE}
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CodePage: integer;
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{$ENDIF}
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end;
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{$IFNDEF HAS_ANSISTRING_CODEPAGE}
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{necessary to ensure compilation}
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const
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CP_ACP = 0; // default to ANSI code page
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CP_OEMCP = 1; // default to OEM (console) code page
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CP_UTF16 = 1200; // utf-16
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CP_UTF16BE = 1201; // unicodeFFFE
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CP_UTF7 = 65000; // utf-7
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CP_UTF8 = 65001; // utf-8
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CP_ASCII = 20127; // us-ascii
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CP_NONE = $FFFF; // rawbytestring encoding
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{$ENDIF}
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const
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CharSetMap: array [0..69] of TCharsetMap = (
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(CharsetID: 0; CharSetName: 'NONE'; CharSetWidth: 1; CodePage: CP_NONE),
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(CharsetID: 1; CharSetName: 'OCTETS'; CharSetWidth: 1; CodePage: CP_NONE),
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(CharsetID: 2; CharSetName: 'ASCII'; CharSetWidth: 1; CodePage: CP_ASCII),
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(CharsetID: 3; CharSetName: 'UNICODE_FSS'; CharSetWidth: 3; CodePage: CP_UTF8),
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(CharsetID: 4; CharSetName: 'UTF8'; CharSetWidth: 4; CodePage: CP_UTF8),
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(CharsetID: 5; CharSetName: 'SJIS_0208'; CharSetWidth: 2; CodePage: 20932),
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(CharsetID: 6; CharSetName: 'EUCJ_0208'; CharSetWidth: 2; CodePage: 20932),
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(CharsetID: 7; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 8; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 9; CharSetName: 'DOS737'; CharSetWidth: 1; CodePage: 737),
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(CharsetID: 10; CharSetName: 'DOS437'; CharSetWidth: 1; CodePage: 437),
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(CharsetID: 11; CharSetName: 'DOS850'; CharSetWidth: 1; CodePage: 850),
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(CharsetID: 12; CharSetName: 'DOS865'; CharSetWidth: 1; CodePage: 865),
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(CharsetID: 13; CharSetName: 'DOS860'; CharSetWidth: 1; CodePage: 860),
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(CharsetID: 14; CharSetName: 'DOS863'; CharSetWidth: 1; CodePage: 863),
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(CharsetID: 15; CharSetName: 'DOS775'; CharSetWidth: 1; CodePage: 775),
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(CharsetID: 16; CharSetName: 'DOS858'; CharSetWidth: 1; CodePage: 858),
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(CharsetID: 17; CharSetName: 'DOS862'; CharSetWidth: 1; CodePage: 862),
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(CharsetID: 18; CharSetName: 'DOS864'; CharSetWidth: 1; CodePage: 864),
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(CharsetID: 19; CharSetName: 'NEXT'; CharSetWidth: 1; CodePage: CP_NONE),
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(CharsetID: 20; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 21; CharSetName: 'ISO8859_1'; CharSetWidth: 1; CodePage: 28591),
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(CharsetID: 22; CharSetName: 'ISO8859_2'; CharSetWidth: 1; CodePage: 28592),
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(CharsetID: 23; CharSetName: 'ISO8859_3'; CharSetWidth: 1; CodePage: 28593),
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(CharsetID: 24; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 25; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 26; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 27; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 28; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 29; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 30; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 31; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 32; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 33; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 34; CharSetName: 'ISO8859_4'; CharSetWidth: 1; CodePage: 28594),
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(CharsetID: 35; CharSetName: 'ISO8859_5'; CharSetWidth: 1; CodePage: 28595),
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(CharsetID: 36; CharSetName: 'ISO8859_6'; CharSetWidth: 1; CodePage: 28596),
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(CharsetID: 37; CharSetName: 'ISO8859_7'; CharSetWidth: 1; CodePage: 28597),
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(CharsetID: 38; CharSetName: 'ISO8859_8'; CharSetWidth: 1; CodePage: 28598),
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(CharsetID: 39; CharSetName: 'ISO8859_9'; CharSetWidth: 1; CodePage: 28599),
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(CharsetID: 40; CharSetName: 'ISO8859_13'; CharSetWidth: 1; CodePage: 28603),
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(CharsetID: 41; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 42; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 43; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 44; CharSetName: 'KSC_5601'; CharSetWidth: 2; CodePage: 949),
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(CharsetID: 45; CharSetName: 'DOS852'; CharSetWidth: 1; CodePage: 852),
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(CharsetID: 46; CharSetName: 'DOS857'; CharSetWidth: 1; CodePage: 857),
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(CharsetID: 47; CharSetName: 'DOS861'; CharSetWidth: 1; CodePage: 861),
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(CharsetID: 48; CharSetName: 'DOS866'; CharSetWidth: 1; CodePage: 866),
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(CharsetID: 49; CharSetName: 'DOS869'; CharSetWidth: 1; CodePage: 869),
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(CharsetID: 50; CharSetName: 'CYRL'; CharSetWidth: 1; CodePage: 1251),
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(CharsetID: 51; CharSetName: 'WIN1250'; CharSetWidth: 1; CodePage: 1250),
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(CharsetID: 52; CharSetName: 'WIN1251'; CharSetWidth: 1; CodePage: 1251),
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(CharsetID: 53; CharSetName: 'WIN1252'; CharSetWidth: 1; CodePage: 1252),
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(CharsetID: 54; CharSetName: 'WIN1253'; CharSetWidth: 1; CodePage: 1253),
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(CharsetID: 55; CharSetName: 'WIN1254'; CharSetWidth: 1; CodePage: 1254),
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(CharsetID: 56; CharSetName: 'BIG_5'; CharSetWidth: 2; CodePage: 950),
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(CharsetID: 57; CharSetName: 'GB_2312'; CharSetWidth: 2; CodePage: 936),
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(CharsetID: 58; CharSetName: 'WIN1255'; CharSetWidth: 1; CodePage: 1255),
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(CharsetID: 59; CharSetName: 'WIN1256'; CharSetWidth: 1; CodePage: 1256),
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(CharsetID: 60; CharSetName: 'WIN1257'; CharSetWidth: 1; CodePage: 1257),
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(CharsetID: 61; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 62; CharSetName: 'Unknown'; CharSetWidth: 0; CodePage: CP_NONE),
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(CharsetID: 63; CharSetName: 'KOI8R'; CharSetWidth: 1; CodePage: 20866),
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(CharsetID: 64; CharSetName: 'KOI8U'; CharSetWidth: 1; CodePage: 21866),
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(CharsetID: 65; CharSetName: 'WIN1258'; CharSetWidth: 1; CodePage: 1258),
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(CharsetID: 66; CharSetName: 'TIS620'; CharSetWidth: 1; CodePage: 874),
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(CharsetID: 67; CharSetName: 'GBK'; CharSetWidth: 2; CodePage: 936),
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(CharsetID: 68; CharSetName: 'CP943C'; CharSetWidth: 2; CodePage: 943),
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(CharsetID: 69; CharSetName: 'GB18030'; CharSetWidth: 4; CodePage: 54936)
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);
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class function TFirebirdCharacterSets.GetCharsetName(CharSetID: integer): string;
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begin
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Result := '';
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if (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap)) and
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(CharSetMap[CharSetID].CharSetID = CharSetID) then
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begin
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Result := CharSetMap[CharSetID].CharSetName;
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Exit;
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end;
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end;
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{$IFDEF HAS_ANSISTRING_CODEPAGE}
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class function TFirebirdCharacterSets.CharSetID2CodePage(CharSetID: integer;
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var CodePage: TSystemCodePage): boolean;
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begin
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Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
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and (CharSetMap[CharSetID].CharSetID = CharSetID);
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if Result then
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begin
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CodePage := CharSetMap[CharSetID].CodePage;
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Result := true;
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Exit;
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end;
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end;
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class function TFirebirdCharacterSets.CodePage2CharSetID(CodePage: TSystemCodePage;
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var CharSetID: integer): boolean;
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var i: integer;
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begin
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Result := false;
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for i := Low(CharSetMap) to High(CharSetMap) do
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if CharSetMap[i].CodePage = CodePage then
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begin
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CharSetID := CharSetMap[i].CharSetID;
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Result := true;
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Exit;
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end;
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end;
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{$ENDIF}
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class function TFirebirdCharacterSets.CharSetName2CharSetID(CharSetName: string;
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var CharSetID: integer): boolean;
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var i: integer;
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begin
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Result := false;
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for i := Low(CharSetMap) to High(CharSetMap) do
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if CompareStr(CharSetMap[i].CharSetName, CharSetName) = 0 then
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begin
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CharSetID := CharSetMap[i].CharSetID;
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Result := true;
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Exit;
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end;
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end;
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class function TFirebirdCharacterSets.CharSetWidth(CharSetID: integer; var Width: integer
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): boolean;
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begin
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Result := (CharSetID >= Low(CharSetMap)) and (CharSetID <= High(CharSetMap))
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and (CharSetMap[CharSetID].CharSetID = CharSetID);
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if Result then
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begin
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Width := CharSetMap[CharSetID].CharSetWidth;
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Result := true;
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Exit;
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end;
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end;
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end.
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