to: 轻松虎,呵呵.偶是浙大的,你已经毕业叻么?88delphi板上没有见到过好像,呵呵
模delphi时间不长,多多指教的说,呵呵
发现用SOCKET配合着链表(自己写或者用TLIST做),做网络通讯的协议非常方便,呵呵.
tlist做链表更是方便的不得了.偶的项目原来不稳定,只好用它重新改写叻协议,效果
不错的说,呵呵.
另外,偶再贴一下<delphi深度历险>中的xstring公用单元吧,这个在自己做网络协议的
时候打包,解包必备,嘿嘿.偶不知没有它的化协议不知定义成什么样子叻.
unit xStrings;
interface
uses SysUtils, Classes, Windows, FileCtrl, Dialogs;
const
DEFAULT_DELIMITERS = [' ', #9, #10, #13];
function GetToken(const S: string; index: Integer; bTrail: Boolean = False; Delimiters: TSysCharSet = DEFAULT_DELIMITERS): string;
function CountWords(S: string; Delimiters: TSysCharSet = DEFAULT_DELIMITERS): Integer;
//上面这两个配合着用的最多.
function BracketString(const S: string): string;
procedure TruncateCRLF(var S: string);
function IsContainingCRLF(const S: string): Boolean;
function ReplaceString(var S: string; const Token, NewToken: string; bCaseSensitive: Boolean): Boolean;
procedure Simple_ReplaceString(var S: string; const Substr: string; index, Count: Integer);
function UnquoteString(const S: string): string;
function FirstToken(var S: string; const Delimiter: string; Remove: Boolean): string;
function AddTimeStamp(const S: string): string;
function PartialIndexOf(SL: TStrings; S: string; StartIndex: Integer; bForward: Boolean): Integer;
function CompositeStrings(SL: TStrings; const Delimiter: string): string;
function SafeLoadStrings(SL: TStrings; const Filename: string): Boolean;
procedure SafeSaveStrings(SL: TStrings; const Filename: string);
procedure RemoveDuplicates(SL: TStrings);
function ParseRPLNo(var Msg: string): Integer;
function RPos(const C: Char; const S: string): Integer;
function AnsiIPos(const Substr, S: string): Integer;
function MatchString(S, SubS: string; Options: TFindOptions): Integer;
implementation
function GetToken(const S: string; index: Integer; bTrail: Boolean = False; Delimiters: TSysCharSet = DEFAULT_DELIMITERS): string;
var
I, W, head, tail: Integer;
bInWord : Boolean;
begin
I := 1;
W := 0;
bInWord := False;
head := 1;
tail := Length(S);
while (I <= Length(S)) and (W <= index) do
begin
if S in Delimiters then
begin
if (W = index) and bInWord then tail := I - 1;
bInWord := False;
end else
begin
if not bInWord then
begin
bInWord := True;
Inc(W);
if W = index then head := I;
end;
end;
Inc(I);
end;
if bTrail then tail := Length(S);
if W >= index then Result := Copy(S, head, tail - head + 1)
else Result := '';
end;
function CountWords(S: string; Delimiters: TSysCharSet = DEFAULT_DELIMITERS): Integer;
var
bInWord: Boolean;
I : Integer;
begin
Result := 0;
I := 1;
bInWord := False;
while I <= Length(S) do
begin
if S in Delimiters then bInWord := False
else
begin
if not bInWord then
begin
bInWord := True;
Inc(Result);
end;
end;
Inc(I);
end;
end;
function IsContainingCRLF(const S: string): Boolean;
var
len: Integer;
begin
len := Length(S);
Result := (len >= 2) and (S[len - 1] = #13) and (S[len] = #10);
end;
procedure TruncateCRLF(var S: string);
var
I: Integer;
begin
I := 1;
while I <= Length(S) do
if (S = #13) or (S = #10) then Delete(S, I, 1)
else Inc(I);
end;
function ReplaceString(var S: string; const Token, NewToken: string; bCaseSensitive: Boolean): Boolean;
var
I : Integer;
sFirstPart: string;
begin
if bCaseSensitive then
I := AnsiPos(Token, S)
else
I := AnsiPos(AnsiUpperCase(Token), AnsiUpperCase(S));
if I <> 0 then
begin
sFirstPart := Copy(S, 1, I - 1) + NewToken; // 磷?礚絘患癹
S := Copy(S, I + Length(Token), Maxint);
end;
Result := I <> 0;
if Result then
begin
ReplaceString(S, Token, NewToken, bCaseSensitive);
S := sFirstPart + S;
end;
end;
procedure Simple_ReplaceString(var S: string; const Substr: string; index, Count: Integer);
begin
S := Format('%s%s%s',[Copy(S, 1, index - 1), Substr, Copy(S, index + Count, Maxint)]);
end;
function BracketString(const S: string): string;
begin
Result := S;
if (Result = '') or (Result[1] <> '[') then Result := '[' + Result;
if Result[Length(Result)] <> ']' then Result := Result + ']';
end;
function UnquoteString(const S: string): string;
begin
if S = '' then Exit;
Result := S;
if Result[1] = '"' then Delete(Result, 1, 1);
if Result = '' then Exit;
if Result[Length(Result)] = '"' then Delete(Result, Length(Result), 1);
end;
function FirstToken(var S: string; const Delimiter: string; Remove: Boolean): string;
var
I: Integer;
begin
I := Pos(Delimiter, S);
if I <> 0 then
begin
Result := Copy(S, 1, I - 1);
if Remove then S := Trim(Copy(S, I + 1, Maxint));
end else
begin
Result := S;
if Remove then S := '';
end;
end;
function CompositeStrings(SL: TStrings; const Delimiter: string): string;
var
I: Integer;
begin
Result := '';
with SL do
begin
for I := 0 to Count - 2 do
Result := Result + Strings + Delimiter;
if Count > 0 then
Result := Result + Strings[Count - 1];
end;
end;
function AddTimeStamp(const S: string): string;
begin
if S = '' then
Result := DateTimeToStr(Now)
else if S[Length(S)] = #10 then
Result := Copy(S, 1, Length(S) - 2) + ' at ' + DateTimeToStr(Now) + #13#10
else
Result := S + ' at ' + DateTimeToStr(Now);
end;
function SafeLoadStrings(SL: TStrings; const Filename: string): Boolean;
begin
Result := False;
repeat
try
if not FileExists(Filename) then Exit;
SL.LoadFromFile(Filename);
Result := True;
Break;
except
Sleep(500);
end;
until False;
end;
procedure SafeSaveStrings(SL: TStrings; const Filename: string);
begin
ForceDirectories(ExtractFilePath(Filename));
repeat
try
SL.SaveToFile(Filename);
Break;
except
Sleep(500);
end;
until False;
end;
function PartialIndexOf(SL: TStrings; S: string; StartIndex: Integer; bForward: Boolean): Integer;
begin
with SL do
begin
if bForward then
begin
for Result := StartIndex to Count - 1 do
if AnsiCompareText(S, Copy(Strings[Result], 1, Length(S))) = 0 then Exit;
end else
begin
for Result := StartIndex downto 0 do
if AnsiCompareText(S, Copy(Strings[Result], 1, Length(S))) = 0 then Exit;
end;
end;
Result := -1;
end;
// duplicated string must be adjacent ..
procedure RemoveDuplicates(SL: TStrings);
var
I: Integer;
begin
with SL do
begin
I := 1;
while I < Count do
if CompareText(Strings, Strings[I - 1]) = 0 then
Delete(I)
else
Inc(I);
end;
end;
function ParseRPLNo(var Msg: string): Integer;
var
S: string;
begin
S := GetToken(Msg, 1, False);
Result := StrToIntDef(S, 0);
Msg := GetToken(Msg, 2, True);
end;
function RPos(const C: Char; const S: string): Integer;
var
I: Integer;
begin
Result := 0;
I := Length(S);
repeat
if S = C then
begin
Result := I;
Exit;
end;
dec(I);
until I < 1;
end;
function AnsiIPos(const Substr, S: string): Integer;
begin
Result := AnsiPos(AnsiLowerCase(Substr), AnsiLowerCase(S));
end;
function MatchString(S, SubS: string; Options: TFindOptions): Integer;
const
Delimiters = [#0..#47, #58..#64, #123..#255];
var
EndI: Integer;
begin
if not (frMatchCase in Options) then
begin
S := AnsiUpperCase(S);
SubS := AnsiUpperCase(SubS);
end;
if frWholeWord in Options then
begin
Result := 1;
EndI := Length(SubS);
while EndI <= Length(S) do
begin
if ((Result = 1) or (S[Result - 1] in Delimiters)) and ((EndI = Length(S)) or (S[EndI + 1] in Delimiters)) and
(AnsiCompareStr(Copy(S, Result, Length(SubS)), SubS) = 0) then Break;
Inc(Result);
Inc(EndI);
end;
Result := EndI;
if Result > Length(S) then Result := 0;
end else Result := AnsiPos(SubS, S);
end;
end.
]