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| 盒子资源分类 |
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| uEncoding字符串UNICODE处理单元 |
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| 关键字：TEncoding UTF8 UTF16 UTF32 BIG5 GB UNICODE |
| 来 自：原创 |
| 平 台：Win2k/XP/NT,Win2003 |
下载所需：0 火柴 |
| 深浅度：中级 |
完成时间：2009/1/30 |
| 发布者：senfore |
发布时间：2009/2/4 |
| 编辑器：D2007 |
语 种：简体中文 |
| 分 类：字符串 |
下载浏览：889/15595 |
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{* |<PRE>
==========
* 软件名称：FcpEditor
* 单元名称：uEncoding
* 单元作者：Senfore
* 备 注：UNICODE读写支持
* 开发平台：Windows Xp Sp3 + Delphi 2007/Delphi2009
* 兼容测试：
* 本 地 化：使Delphi2007能使用Delphi2009的Encoding方式处理文本
* 单元标识：$Id: uEncoding.pas,v 1.1 2009/01/28
* 修改记录：
* 2009.01.28 V1.1
* 让Delphi2007环境下支持UTF32格式读写
* 2009.01.06 V1.0
* 创建单元，实现功能
==========
|</PRE>}
unit uEncoding;
{$DEFINE UCS4_ENCODING_SUPPORT}
interface
uses Classes,Windows,SysUtils;
{$IFNDEF UNICODE}
function InterlockedCompareExchangePointer(var Destination: Pointer; Exchange: Pointer; Comperand: Pointer): Pointer;
{$ENDIF}
{$IFNDEF UNICODE}
type
UnicodeString=WideString;
RawByteString=AnsiString;
{$ENDIF}
{$IFNDEF UNICODE}
type
TCharArray = array of Char;
EEncodingError = class(Exception);
TEncoding = class
strict private
class var
FASCIIEncoding: TEncoding;
FBigEndianUnicodeEncoding: TEncoding;
FDefaultEncoding: TEncoding;
FUnicodeEncoding: TEncoding;
FUTF7Encoding: TEncoding;
FUTF8Encoding: TEncoding;
class function GetASCII: TEncoding; static;
class function GetBigEndianUnicode: TEncoding; static;
class function GetDefault: TEncoding; static;
class function GetUnicode: TEncoding; static;
class function GetUTF7: TEncoding; static;
class function GetUTF8: TEncoding; static;
strict protected
FIsSingleByte: Boolean;
FMaxCharSize: Integer;
function GetByteCount(Chars: PChar; CharCount: Integer): Integer; overload; virtual; abstract;
function GetBytes(Chars: PChar; CharCount: Integer; Bytes: PByte; ByteCount: Integer): Integer; overload; virtual; abstract;
function GetCharCount(Bytes: PByte; ByteCount: Integer): Integer; overload; virtual; abstract;
function GetChars(Bytes: PByte; ByteCount: Integer; Chars: PChar; CharCount: Integer): Integer; overload; virtual; abstract;
public
class function Convert(Source, Destination: TEncoding; Bytes: TBytes): TBytes; overload;
class function Convert(Source, Destination: TEncoding; Bytes: TBytes; StartIndex, Count: Integer): TBytes; overload;
class procedure FreeEncodings;
class function IsStandardEncoding(AEncoding: TEncoding): Boolean; static;
class function GetBufferEncoding(const Buffer: TBytes; var AEncoding: TEncoding): Integer; static;
function GetByteCount(const Chars: TCharArray): Integer; overload;
function GetByteCount(const Chars: TCharArray; CharIndex, CharCount: Integer): Integer; overload;
function GetByteCount(const S: string): Integer; overload;
function GetByteCount(const S: string; CharIndex, CharCount: Integer): Integer; overload;
function GetBytes(const Chars: TCharArray): TBytes; overload;
function GetBytes(const Chars: TCharArray; CharIndex, CharCount: Integer;
var Bytes: TBytes; ByteIndex: Integer): Integer; overload;
function GetBytes(const S: string): TBytes; overload;
function GetBytes(const S: string; CharIndex, CharCount: Integer;
var Bytes: TBytes; ByteIndex: Integer): Integer; overload;
function GetCharCount(const Bytes: TBytes): Integer; overload;
function GetCharCount(const Bytes: TBytes; ByteIndex, ByteCount: Integer): Integer; overload;
function GetChars(const Bytes: TBytes): TCharArray; overload;
function GetChars(const Bytes: TBytes; ByteIndex, ByteCount: Integer): TCharArray; overload;
function GetChars(const Bytes: TBytes; ByteIndex, ByteCount: Integer;
var Chars: TCharArray; CharIndex: Integer): Integer; overload;
class function GetEncoding(CodePage: Integer): TEncoding; static;
function GetMaxByteCount(CharCount: Integer): Integer; virtual; abstract;
function GetMaxCharCount(ByteCount: Integer): Integer; virtual; abstract;
function GetPreamble: TBytes; virtual; abstract;
function GetString(const Bytes: TBytes): string; overload;
function GetString(const Bytes: TBytes; ByteIndex, ByteCount: Integer): string; overload;
class property ASCII: TEncoding read GetASCII;
class property BigEndianUnicode: TEncoding read GetBigEndianUnicode;
class property Default: TEncoding read GetDefault;
property IsSingleByte: Boolean read FIsSingleByte;
class property Unicode: TEncoding read GetUnicode;
class property UTF7: TEncoding read GetUTF7;
class property UTF8: TEncoding read GetUTF8;
end;
是一个进行UNICODE格式读写处理的单元，仿照Delphi2009的TEncoding类编写，可以进行UTF8、UTF16、UTF32或指定代码页对文本进行读写。 |
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