我對DELPHI寫的幾個基類型

2019-11-18 18:05:35

字體：大中小

來源：轉載

供稿：網友

//用慣java或C#的人可能對DELPHI非常生氣,連基本的類型都沒有,我平時工作中,經常會曾試著把一些函數集合在一起,也經常做一些屬于自己的基礎類型的函數,此處把它們弄出來,有不當之處,請大家點評.
unit BaseClass;

interface

uses
SysUtils, Classes, StrUtils, IdGlobal, Math;

type
TCharSet = set of char;
var
TNormalCharSet: TCharSet = [#13, #10, #32, '.', ',', ';'];
type

TString = class
PRivate
    FText: string;
public
    function CharAt(APosition: Integer): Char;
      //指定位置的字母
    function toLowerCase: string; overload;
    class function toLowerCase(AString: string): string; overload;
      //小寫

    function toUpperCase: string; overload;
    class function toUpperCase(AString: string): string; overload;
      //大寫

class function ValueOf(AValue: string): Boolean; overload;
class function ValueOf(AValue: Boolean): string; overload;

class function StringIn(AValue: string; AValues: array of string): Boolean;

class function Left(AValue: string; ALength: Integer): string;
class function Right(AValue: string; ALength: Integer): string;

    class function DeletePrefix(AValue: string; FixedString: TCharSet = [#32]): string; //刪除前綴
    class function DeleteSuffix(AValue: string; FixedString: TCharSet = [#32]): string; //刪除后綴
    //
    class function CompareString(AValue1: string; AValue2: string): Boolean;

class function HashCode(AValue: string): Integer;

class function LastChar(AValue: string): Char;

    class function StringReplace(const S, OldPattern, NewPattern: string;
                   Flags: TReplaceFlags): string;
    class function StringOfChar(Ch: Char; Count: Integer): string;

class function SetString(var s: string; buffer: PChar; len: Integer): string;

    class function GetPy(AStr: string): string;
          //得到對應的拼音.
    class function IsAllChinese(AStr: string): Boolean;
    class function IsAllEnglish(AStr: string): Boolean;

class function GetFirstWord(AValue: string; var AWord: string; ASeparator: TCharSet): Integer; overload;

class function GetFirstWord(AValue: string; var AWord: string; ASeparator: string): Integer; overload;
//返回值為從開始到該單據的長度。

    class function GetAllWord(AValue: string; ASeparator: string): TStringList; overload;
                   //返回所有的關鍵字。使用完后，請將結果集Free;
                   //注：在以后的使用中，請不要使用該函數。請使用它的重載版
                   //GetAllWord(AValue: string; ASeparator: string; AStringList: TStringList);
    class procedure GetAllWord(AValue: string; ASeparator: string; AStringList: TStrings); overload;
                   //把所有的結果集裝入AStringList;

    class procedure GetAllWordWithAll(AValue: string; ASeparator: string; AStringList: TStrings);
    class function StringToCharSet(AValue: string): TCharSet;
    class function CharSetToString(AValue: TCharSet): string;

    class function UpdateSentence(AOldString: string; //被操作字符串
                                  AUpdateSource: string; //查找的單詞。
                                  AUpdateString: string; //替換的單據。
                                  ASentenceSeparator: string; //句子分隔符。
                                  AWordSeparator: string //單據分隔符;
                                  ): string; //返回結果。
       //如 ' dbarcode ASC, dname DESC', 'dbarcode', '', ',', ' '的返回值為
            //' dname DESC';

    class function DeleteRepeat(AOldString: string;          //要處理字符
                                ADeleteString: Char;         //要刪除的字符
                                ARepeat: Char): string;      //重復字符

    class function IfThen(AExpression: Boolean; ATrue: string; AFalse: string): string;
                   //根據表達式的值，返回相應的字符串。
    class function AbsoluteToRelate(AAbsolute: string; ACurrent: string): string;
                   //給定兩個文件，將絕對路徑轉換成相對路徑。
    class function RelateToAbsolute(ARelate: string; ACurrent: string): string;
    class function SimilarPosition(AOne, ATwo: string): Integer;

class function GetCharNum(AString: string; AChar: Char): Integer;

class function IndexOf(AString, ASubString: string): Integer;

class function ZeroToInt(AString: string): Integer;
class function ZeroToFloat(AString: string): Double;

class function ZeroToStr(AString: string): string;

class function SameText(AString, AString1: string): Boolean;

class function Reverse(AString: string): string;

class function IsValidip(const S: String): Boolean;

class function FillString(AChar: Char; ALength: Integer): string;

class function StuffString(const AText: string; AStart, ALength: Cardinal;
const ASubText: string): string;

class function GetNextString(var SourceString: string; asplitChar: string): string;
end;

//整型類。
TInteger = class
class function IntToStr(AInteger: Integer): string; overload;
class function IntToStr(AInteger: Int64): string; overload;

class function IsValidInt(AString: string): Boolean;
class function IsValidInt64(AString: string): Boolean;

    class function MaxInt: Integer;
    class function MaxLongInt: Integer;
    class function HashCode(AInteger: Integer): Integer;

class function IntToBin(AInteger: Cardinal): string;
class function IntToHex(AInteger: Integer): string;

class function HexToInt(AString: string): Integer;
class function MakeSerialNo(AInteger: Integer; ADigit: Integer): string;
end;

TFloat = class
    class function IsValidFloat(AString: string): Boolean;
    class function MaxDouble: Double;
    class function MinDouble: Double;
    class function MaxExtended: Extended;
    class function MinExtended: Extended;

    class function SameValue(const A, B: Single; Epsilon: Single = 0): Boolean; overload;
    class function SameValue(const A, B: Double; Epsilon: Double = 0): Boolean; overload;
    class function SameValue(const A, B: Extended; Epsilon: Extended = 0): Boolean; overload;

class function FloatToMoney(const Value: Double; Round: Boolean = True): string;
end;

TBoolean = class
class function BoolToStr(ABoolean: Boolean): string;
class function StrToBool(AString: string): Boolean; //如果不為'true'則為false;
end;
implementation

{ TString }
function GetPYIndexChar(AChar: string): Char;
begin
case WORD(AChar[1]) shl 8 + WORD(AChar[2]) of
    $B0A1..$B0C4: Result := 'A';
    $B0C5..$B2C0: Result := 'B';
    $B2C1..$B4ED: Result := 'C';
    $B4EE..$B6E9: Result := 'D';
    $B6EA..$B7A1: Result := 'E';
    $B7A2..$B8C0: Result := 'F';
    $B8C1..$B9FD: Result := 'G';
    $B9FE..$BBF6: Result := 'H';
    $BBF7..$BFA5: Result := 'J';
    $BFA6..$C0AB: Result := 'K';
    $C0AC..$C2E7: Result := 'L';
    $C2E8..$C4C2: Result := 'M';
    $C4C3..$C5B5: Result := 'N';
    $C5B6..$C5BD: Result := 'O';
    $C5BE..$C6D9: Result := 'P';
    $C6DA..$C8BA: Result := 'Q';
    $C8BB..$C8F5: Result := 'R';
    $C8F6..$CBF9: Result := 'S';
    $CBFA..$CDD9: Result := 'T';
    $CDDA..$CEF3: Result := 'W';
    $CEF4..$D188: Result := 'X';
    $D1B9..$D4D0: Result := 'Y';
    $D4D1..$D7F9: Result := 'Z';
else
    Result := Char(0);
end;
end;

class function TString.GetPy(AStr: string): string;
var
I: Integer;
begin
Result := '';
for I := 1 to Length(AStr) do
begin

    if ByteType(AStr, i) = mbTrailByte then
      Result := Result + GetPYIndexChar(AStr[i - 1] + AStr[i])
    else
      if ByteType(AStr, i) = mbSingleByte then
        Result := Result + AStr[i];
end;

end;

function TString.CharAt(APosition: Integer): Char;
begin
Result := FText[APosition];
end;

class function TString.CharSetToString(AValue: TCharSet): string;
begin

end;

class function TString.CompareString(AValue1, AValue2: string): Boolean;
begin
Result := UpperCase(AValue1) = UpperCase(AValue2);
end;

class function TString.DeletePrefix(AValue: string;
FixedString: TCharSet): string;
begin
while System.Length(AValue) > 0 do
begin
    if AValue[1] in FixedString then
      Delete(AValue, 1, 1)
    else
      Break;
end;
Result := AValue;
end;

class function TString.GetFirstWord(AValue: string; var AWord: string; ASeparator: TCharSet
): Integer;
var
tmpStr: string;
tmpPos: Integer;
begin
tmpStr := DeleteSuffix(AValue, ASeparator);
tmpStr := DeletePrefix(AValue, ASeparator);

Result := Length(AValue) - Length(tmpStr);
{ if Length(tmpStr) = 0 then Exit;

if (tmpStr[1] = '''') and (tmpStr[2] = '''')then
begin
    for tmpPos := 3 to Length(tmpStr) do
    begin
      if tmpStr[tmpPos] in [''''] then
        Break;
    end;
end;

if tmpPos > 3 then tmpPos :=tmpPos + 2;
}
for tmpPos := 1 to Length(tmpStr) do
begin
if tmpStr[tmpPos] in ASeparator then
Break;
end;

tmpPos := tmpPos -1;

// {TODO : -oghs 修復最后一個參數解析不正確}
if (tmpPos = 0) and (AValue <> '') then
tmpPos := Length(AValue);

AWord := Copy(AValue, Result + 1, tmpPos);

Result := Result + tmpPos;
end;

class function TString.HashCode(AValue: string): Integer;
var
i: Integer;
tmpValue: Integer;
begin
tmpValue := 0;
for I := 1 to System.Length(AValue) do
begin
tmpValue := 3 * tmpValue + Ord(AValue[I]);
end;
Result := tmpValue;
end;

class function TString.IsAllChinese(AStr: string): Boolean;
var
I: Integer;
begin
Result := True;
for I := 1 to Length(AStr) do
begin
    if ByteType(AStr, I) = mbSingleByte then
    begin
      Result := False;
      Break;
    end;
end;
end;

class function TString.IsAllEnglish(AStr: string): Boolean;
var
I: Integer;
begin
Result := True;
for I := 1 to Length(AStr) do
begin
    if ByteType(AStr, I) <> mbSingleByte then
    begin
      Result := False;
      Break;
    end;
end;
end;

class function TString.LastChar(AValue: string): Char;
begin
Result := AValue[System.Length(AValue)];
end;

class function TString.Left(AValue: string; ALength: Integer): string;
begin
Result := Copy(AValue, 1, ALength);
end;

class function TString.Right(AValue: string; ALength: Integer): string;
begin
Result := StrUtils.RightStr(AValue, ALength);
end;

class function TString.SetString(var s: string; buffer: PChar;
len: Integer): string;
begin
System.SetString(s, buffer, len);
Result := s;
end;

class function TString.StringIn(AValue: string;
   AValues: array of string): Boolean;
var
I: Integer;
begin
Result := False;
for I := Low(AValues) to High(AValues) do
begin
    if UpperCase(AValue) = UpperCase(AValues[I]) then
    begin
      Result := True;
      Break;
    end;
end;
end;

class function TString.StringOfChar(Ch: Char; Count: Integer): string;
begin
Result := System.StringOfChar(Ch, Count);
end;

class function TString.StringReplace(const S, OldPattern,
NewPattern: string; Flags: TReplaceFlags): string;
begin
Result := Sysutils.StringReplace(S, OldPattern, NewPattern, Flags);
end;

class function TString.StringToCharSet(AValue: string): TCharSet;
var
I: Integer;
begin
Result := [];
for I := 1 to Length(AValue) do
begin
Result := Result + [AValue[I]];
end;
end;

function TString.toLowerCase: string;
begin
Result := LowerCase(FText);
end;

function TString.toUpperCase: string;
begin
Result := Uppercase(FText);
end;

class function TString.ValueOf(AValue: Boolean): string;
begin
if AValue then
Result := '是'
else
Result := '否';
end;

class function TString.ValueOf(AValue: string): Boolean;
begin
Result := StringIn(AValue, ['是', 'yes', 'ok']);
end;

class function TString.GetFirstWord(AValue: string; var AWord: string;
ASeparator: string): Integer;
begin
Result := GetFirstWord(AValue, AWord, StringToCharSet(ASeparator));
end;

class function TString.GetAllWord(AValue, ASeparator: string): TStringList;
var
tmpList: TStringList;
tmpWord: string;
begin
tmpList := TStringList.Create;
while Length(AValue) > 0 do
begin
    tmpWord := '';
    Delete(AValue, 1, GetFirstWord(AValue, tmpWord, ASeparator));
    if tmpWord <> '' then
      tmpList.Add(tmpWord)
    else
      Break;
end;
Result := tmpList;
end;

class function TString.UpdateSentence(AOldString, AUpdateSource,
AUpdateString, ASentenceSeparator, AWordSeparator: string): string;
var
tmpSentence: string;
tmpWord: string;
tmpWord1: string;
i: Integer;
tmpResult: string;
begin
//得到第一個句子
tmpSentence := AOldString;
tmpResult := '';
while Length(tmpSentence) > 0 do
begin
    i := GetFirstWord(tmpSentence, tmpWord, ASentenceSeparator);
    tmpResult := tmpResult + Left(tmpSentence, i - Length(tmpWord));
    Delete(tmpSentence, 1, I);
    if tmpWord <> '' then
    begin
      i := GetFirstWord(tmpWord, tmpWord1, AWordSeparator);
      tmpResult := tmpResult + Left(tmpWord, i - Length(tmpWord1));
      if CompareString(tmpWord1, AUpdateSource) then
      begin
        tmpResult := tmpResult + AUpdateString;
      end
      else
      begin
        tmpResult := tmpResult + tmpWord;
      end;
    end;
end;
tmpResult := DeletePrefix(tmpResult, [' ', ',']);
tmpResult := DeleteSuffix(tmpResult, [' ', ',']);
tmpResult := DeleteRepeat(tmpResult, ',', ' ');
tmpResult := DeleteRepeat(tmpResult, ' ', ' ');
Result := tmpResult;

end;

class function TString.DeleteRepeat(AOldString: string; ADeleteString,
ARepeat: Char): string;
var
I: Integer;
tmpfind1: Boolean;
begin
tmpfind1 := False;
for I := Length(AOldString) downto 1 do
begin
    if tmpfind1 then
    begin
      if AOldString[I] = ADeleteString then
        Delete(AOldString, I, 1)
      else
      begin
        if AOldString[I] = ARepeat then
        Continue;
        tmpfind1 := AOldString[I] = ADeleteString;
      end;
    end
    else
    begin
      if ADeleteString <> ARepeat then
        if AOldString[I] = ARepeat then
          Continue;

      tmpfind1 := AOldString[I] = ADeleteString
    end;
end;
Result := AOldString;
end;

class function TString.DeleteSuffix(AValue: string;
FixedString: TCharSet): string;
begin
while System.Length(AValue) > 0 do
begin
    if AValue[System.Length(AValue)] in FixedString then
      Delete(AValue, System.Length(AValue), 1)
    else
      Break;
end;
Result := AValue;
end;

class procedure TString.GetAllWord(AValue, ASeparator: string;
AStringList: TStrings);
var
tmpWord: string;
begin
if AStringList = nil then
AStringList := TStringList.Create;

while Length(AValue) > 0 do
begin
    tmpWord := '';
    Delete(AValue, 1, GetFirstWord(AValue, tmpWord, ASeparator));
    if tmpWord <> '' then
      AStringList.Add(tmpWord)
    else
      Break;
end;

end;

class function TString.IfThen(AExpression: Boolean; ATrue,
AFalse: string): string;
begin
if AExpression then
Result := ATrue
else
Result := AFalse;
end;

class function TString.AbsoluteToRelate(AAbsolute,
ACurrent: string): string;
var
tmpSimilarString: string;
AOldFile: string;
i: Integer;
tmpPos: Integer;
begin
//轉換后形成 ../../a.ini;
//如果不在同一個驅動器上,則直接返回絕對路徑.
if ExtractFileDrive(AAbsolute) <> ExtractFileDrive(ACurrent) then
    Result := AAbsolute
else
begin
    tmpSimilarString := '';
    AOldFile := AAbsolute;
    AAbsolute := ExtractFilePath(AAbsolute);
    tmpPos := SimilarPosition(AAbsolute, ACurrent);
    Delete(AOldFile, 1, tmpPos - 1);
    Delete(ACurrent, 1, tmpPos - 1);
    for i := 0 to GetCharNum(ACurrent, '/') -1 do
    begin
      tmpSimilarString := tmpSimilarString + '../';
    end;
    Result := tmpSimilarString + AOldFile;
end;
end;

class function TString.RelateToAbsolute(ARelate, ACurrent: string): string;
var
tmpSimilarString: string;
tmpRootCount: Integer;
i: Integer;
begin
if Length(ARelate) > 2 then
begin
    if ARelate[2] = ':' then
    begin
      Result := ARelate;
      Exit;
    end;
end;

tmpSimilarString := '';
tmpRootCount := 0;
while True do
begin
    if LeftStr(ARelate, 3) = '../' then
    begin
      Inc(tmpRootCount);
      Delete(ARelate, 1, 3);
    end
    else
      break;
end;

tmpSimilarString := ReverseString(ExtractFilePath(ACurrent));
for i := 0 to tmpRootCount do
begin
Delete(tmpSimilarString, 1, Pos('/', tmpSimilarString));
end;

Result := ReverseString(tmpSimilarString) + ARelate;
end;

class function TString.SimilarPosition(AOne, ATwo: string): Integer;
var
i: Integer;
Max: Integer;
begin
if Length(AOne) < Length(ATwo) then
    Max := Length(AOne)
else
    Max := Length(ATwo);
for i := 1 to Max do
begin
    if AOne[i] <> ATwo[i] then
      Break;
end;
Result := i;
end;

class function TString.GetCharNum(AString: string; AChar: Char): Integer;
var
i: Integer;
begin
Result := 0;
for i := 1 to Length(AString) do
begin
if AString[i] = AChar then
Inc(Result);
end;
end;

class procedure TString.GetAllWordWithAll(AValue, ASeparator: string;
AStringList: TStrings);
var
tmpI: Integer;
tmpPos: Integer;
begin
if AStringList = nil then
AStringList := TStringList.Create;

tmpPos := 0;
while Length(AValue) > 0 do
begin
    for tmpI := 1 to Length(AValue) do
    begin
      tmpPos := Pos(AValue[tmpPos], ASeparator);
      if tmpPos > 0 then
      begin
        AStringList.Add(Copy(AValue, 1, tmpPos - 1));
        AStringList.Add(Copy(AValue, tmpPos, 1));
        Delete(AValue, 1, tmpPos);
        Break;
      end
    end;

end; // while

end;

class function TString.toLowerCase(AString: string): string;
begin
Result := LowerCase(AString);
end;

class function TString.toUpperCase(AString: string): string;
begin
Result := Uppercase(AString);
end;

class function TString.IndexOf(AString, ASubString: string): Integer;
begin
Result := Pos(ASubstring, AString);
end;

class function TString.ZeroToInt(AString: string): Integer;
begin
if Trim(AString) = '' then
AString := '0';

Result := StrToInt(AString);
end;

class function TString.ZeroToFloat(AString: string): Double;
begin
if Trim(AString) = '' then
AString := '0.0';
Result := StrToFloat(AString);
end;

class function TString.SameText(AString, AString1: string): Boolean;
begin
Result := SysUtils.SameText(AString, AString1);
end;

class function TString.Reverse(AString: string): string;
begin
Result := ReverseString(AString);
end;

class function TString.IsValidIP(const S: String): Boolean;
var
j, i: Integer;
LTmp: String;
begin
Result := True;
LTmp := Trim(S);
for i := 1 to 4 do begin
    j := StrToIntDef(Fetch(LTmp, '.'), -1);
    Result := Result and (j > -1) and (j < 256);
    if NOT Result then begin
      Break;
    end;
end;
end;

class function TString.ZeroToStr(AString: string): string;
begin
if Trim(AString) = '' then
Result := '0'
else
Result := AString;
end;

class function TString.FillString(AChar: Char; ALength: Integer): string;
var
i: Integer;
begin
Result := '';
for I := 1 to ALength do    // Iterate
begin
    Result := Result + AChar;
end;    // for
end;

class function TString.StuffString(const AText: string; AStart,
ALength: Cardinal; const ASubText: string): string;
begin
Result := StrUtils.StuffString(AText, AStart, ALength, ASubText);
end;

class function TString.GetNextString(var SourceString: string;
ASplitChar: string): string;
var
tmpPos: Integer;
begin
tmpPos := Pos(ASplitChar, SourceString);
if tmpPos = 0 then
begin
    Result := SourceString;
    SourceString := ''
end
else
begin
    Result := TString.Left(SourceString, tmpPos -1);
    Delete(SourceString, 1, tmpPos);
end;
end;

{ TInteger }

class function TInteger.IntToStr(AInteger: Integer): string;
begin
Result := Sysutils.IntToStr(AInteger);
end;

class function TInteger.HashCode(AInteger: Integer): Integer;
begin
Result := AInteger;
end;

class function TInteger.IntToStr(AInteger: Int64): string;
begin
Result := Sysutils.IntToStr(AInteger);
end;

class function TInteger.IsValidInt(AString: string): Boolean;
begin
Result := True;
try
StrToInt(AString);
except
Result := False;
end;
end;

class function TInteger.IsValidInt64(AString: string): Boolean;
begin
Result := True;
try
StrToInt(AString);
except
Result := False;
end;
end;

class function TInteger.MaxInt: Integer;
begin
Result := System.MaxInt;
end;

class function TInteger.MaxLongInt: Integer;
begin
Result := System.MaxLongint;
end;

class function TInteger.IntToBin(AInteger: Cardinal): string;
var
i: Integer;
begin
SetLength(Result, 32);
for i := 1 to 32 do
begin
    if ((AInteger shl (i-1)) shr 31) = 0 then
      Result[i] := '0'
    else
      Result[i] := '1';
end;

end;

class function TInteger.IntToHex(AInteger: Integer): string;
begin
Result := SysUtils.IntToHex(AInteger, 0);
end;

class function TInteger.HexToInt(AString: string): Integer;
begin
if TString.Left(AString, 1) = '$' then
Result := StrToInt(AString)
else
Result := StrToInt('$' + AString);
end;

class function TInteger.MakeSerialNo(AInteger, ADigit: Integer): string;
var
tmpStr: string;
i: Integer;
begin
tmpStr := '';
for I := 0 to ADigit - 1 do    // Iterate
begin
    tmpStr := tmpStr + '0';
end;    // for

Result := FormatFloat(tmpStr, AInteger);

end;

{ TFloat }

class function TFloat.FloatToMoney(const Value: Double; Round: Boolean): string;
begin
//金額默認采用四舍五入

end;

class function TFloat.IsValidFloat(AString: string): Boolean;
begin
Result := True;
try
StrToFloat(AString);
except
Result := False;
end;
end;

class function TFloat.MaxDouble: Double;
begin
Result := 1.7e+308;
end;

class function TFloat.MaxExtended: Extended;
begin
Result := 1.1e+4932;
end;

class function TFloat.MinDouble: Double;
begin
Result := 5.0e-324;
end;

class function TFloat.MinExtended: Extended;
begin
Result := 3.4e-4932;
end;

class function TFloat.SameValue(const A, B: Single;
Epsilon: Single): Boolean;
begin
Result := Math.SameValue(A, B, Epsilon);
end;

class function TFloat.SameValue(const A, B: Double;
Epsilon: Double): Boolean;
begin
Result := Math.SameValue(A, B, Epsilon);
end;

class function TFloat.SameValue(const A, B: Extended;
Epsilon: Extended): Boolean;
begin
Result := Math.SameValue(A, B, Epsilon);
end;

{ TBoolean }

class function TBoolean.BoolToStr(ABoolean: Boolean): string;
begin
if ABoolean then
Result := 'True'
else
Result := 'False';
end;

class function TBoolean.StrToBool(AString: string): Boolean;
begin
if UpperCase(AString) = 'TRUE' then
    Result := True
else
    Result := False;

end;

end.

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