communal.pas

自己整理的 适合新人看 集合有点乱 内容都不错的

function GetRelativePath(Source, Dest: string): string;
  // 比较两路径字符串头部相同串的函数
  function GetPathComp(s1, s2: string): Integer;
  begin
    if Length(s1) > Length(s2) then swapStr(s1, s2);
    Result := Pos(s1, s2);
    while (Result = 0) and (Length(s1) > 3) do
    begin
      if s1 = '' then Exit;
      s1 := ExtractFileDir(s1);
      Result := Pos(s1, s2);
    end;
    if Result <> 0 then Result := Length(s1);
    if Result = 3 then Result := 2;
    // 修正因ExtractFileDir()处理'c:\'时产生的错误.
  end;
  // 取Dest的相对根路径的函数
  function GetRoot(s: ShortString): string;
  var
    i: Integer;
  begin
    Result := '';
    for i := 1 to Length(s) do
      if s[i] = '\' then Result := Result + '..\';
    if Result = '' then Result := '.\';
    // 如果不想处理成".\"的路径格式，可去掉本行
  end;

var
  RelativRoot, RelativSub: string;
  HeadNum: Integer;
begin
  Source := UpperCase(Source);
  Dest := UpperCase(Dest);              // 比较两路径字符串头部相同串
  HeadNum := GetPathComp(Source, Dest); // 取Dest的相对根路径
  RelativRoot := GetRoot(StrRight(Dest, Length(Dest) - HeadNum));
  // 取Source的相对子路径
  RelativSub := StrRight(Source, Length(Source) - HeadNum - 1);
  // 返回
  Result := RelativRoot + RelativSub;
end;

// 运行一个文件
procedure RunFile(const FName: string; Handle: THandle;
  const Param: string);
begin
  ShellExecute(Handle, nil, PChar(FName), PChar(Param), nil, SW_SHOWNORMAL);
end;

// 运行一个文件并等待其结束
function WinExecAndWait32(FileName: string; Visibility: Integer): Integer;
var
  zAppName: array[0..512] of Char;
  zCurDir: array[0..255] of Char;
  WorkDir: string;
  StartupInfo: TStartupInfo;
  ProcessInfo: TProcessInformation;
begin
  StrPCopy(zAppName, FileName);
  GetDir(0, WorkDir);
  StrPCopy(zCurDir, WorkDir);
  FillChar(StartupInfo, SizeOf(StartupInfo), #0);
  StartupInfo.cb := SizeOf(StartupInfo);

  StartupInfo.dwFlags := STARTF_USESHOWWINDOW;
  StartupInfo.wShowWindow := Visibility;
  if not CreateProcess(nil,
    zAppName,                           { pointer to command line string }
    nil,                                { pointer to process security attributes }
    nil,                                { pointer to thread security attributes }
    False,                              { handle inheritance flag }
    CREATE_NEW_CONSOLE or               { creation flags }
    NORMAL_PRIORITY_CLASS,
    nil,                                { pointer to new environment block }
    nil,                                { pointer to current directory name }
    StartupInfo,                        { pointer to STARTUPINFO }
    ProcessInfo) then
    Result := -1                        { pointer to PROCESS_INF }

  else
  begin
    WaitforSingleObject(ProcessInfo.hProcess, INFINITE);
    GetExitCodeProcess(ProcessInfo.hProcess, Cardinal(Result));
  end;
end;

// 应用程序路径
function AppPath: string;
begin
  Result := ExtractFilePath(Application.ExeName);
end;

// 取Windows系统目录
function GetWindowsDir: string;
var
  Buf: array[0..MAX_PATH] of Char;
begin
  GetWindowsDirectory(Buf, MAX_PATH);
  Result := AddDirSuffix(Buf);
end;

// 取临时文件目录
function GetWinTempDir: string;
var
  Buf: array[0..MAX_PATH] of Char;
begin
  GetTempPath(MAX_PATH, Buf);
  Result := AddDirSuffix(Buf);
end;

// 目录尾加'\'修正
function AddDirSuffix(Dir: string): string;
begin
  Result := Trim(Dir);
  if Result = '' then Exit;
  if Result[Length(Result)] <> '\' then Result := Result + '\';
end;

function MakePath(Dir: string): string;
begin
  Result := AddDirSuffix(Dir);
end;

// 判断文件是否正在使用
function IsFileInUse(FName: string): Boolean;
var
  HFileRes: HFILE;
begin
  Result := False;
  if not FileExists(FName) then
    Exit;
  HFileRes := CreateFile(PChar(FName), GENERIC_READ or GENERIC_WRITE, 0,
    nil, OPEN_EXISTING, FILE_ATTRIBUTE_NORMAL, 0);
  Result := (HFileRes = INVALID_HANDLE_VALUE);
  if not Result then
    CloseHandle(HFileRes);
end;

// 取文件长度
function GetFileSize(FileName: string): Integer;
var
  FileVar: file of Byte;
begin
  {$I-}
  try
    AssignFile(FileVar, FileName);
    Reset(FileVar);
    Result := FileSize(FileVar);
    CloseFile(FileVar);
  except
    Result := 0;
  end;
  {$I+}
end;

// 设置文件时间
function SetFileDate(FileName: string; CreationTime, LastWriteTime, LastAccessTime:
  TFileTime): Boolean;
var
  FileHandle: Integer;
begin
  FileHandle := FileOpen(FileName, fmOpenWrite or fmShareDenyNone);
  if FileHandle > 0 then
  begin
    SetFileTime(FileHandle, @CreationTime, @LastAccessTime, @LastWriteTime);
    FileClose(FileHandle);
    Result := True;
  end
  else
    Result := False;
end;

// 取文件时间
function GetFileDate(FileName: string; var CreationTime, LastWriteTime, LastAccessTime:
  TFileTime): Boolean;
var
  FileHandle: Integer;
begin
  FileHandle := FileOpen(FileName, fmOpenRead or fmShareDenyNone);
  if FileHandle > 0 then
  begin
    GetFileTime(FileHandle, @CreationTime, @LastAccessTime, @LastWriteTime);
    FileClose(FileHandle);
    Result := True;
  end
  else
    Result := False;
end;

// 取得与文件相关的图标
// FileName: e.g. "e:\hao\a.txt"
// 成功则返回True
function GetFileIcon(FileName: string; var Icon: TIcon): Boolean;
var
  SHFileInfo: TSHFileInfo;
  h: HWND;
begin
  if not Assigned(Icon) then
    Icon := TIcon.Create;
  h := SHGetFileInfo(PChar(FileName),
    0,
    SHFileInfo,
    SizeOf(SHFileInfo),
    SHGFI_ICON or SHGFI_SYSICONINDEX);
  Icon.Handle := SHFileInfo.hIcon;
  Result := (h <> 0);
end;

// 文件时间转本地时间
function FileTimeToLocalSystemTime(FTime: TFileTime): TSystemTime;
var
  STime: TSystemTime;
begin
  FileTimeToLocalFileTime(FTime, FTime);
  FileTimeToSystemTime(FTime, STime);
  Result := STime;
end;

// 本地时间转文件时间
function LocalSystemTimeToFileTime(STime: TSystemTime): TFileTime;
var
  FTime: TFileTime;
begin
  SystemTimeToFileTime(STime, FTime);
  LocalFileTimeToFileTime(FTime, FTime);
  Result := FTime;
end;

// 创建备份文件
function CreateBakFile(FileName, Ext: string): Boolean;
var
  BakFileName: string;
begin
  BakFileName := FileName + '.' + Ext;
  Result := CopyFile(PChar(FileName), PChar(BakFileName), False);
end;

// 删除整个目录
function Deltree(Dir: string): Boolean;
var
  sr: TSearchRec;
  fr: Integer;
begin
  if not DirectoryExists(Dir) then
  begin
    Result := True;
    Exit;
  end;
  fr := FindFirst(AddDirSuffix(Dir) + '*.*', faAnyFile, sr);
  try
    while fr = 0 do
    begin
      if (sr.Name <> '.') and (sr.Name <> '..') then
      begin
        if sr.Attr and faDirectory = faDirectory then
          Result := Deltree(AddDirSuffix(Dir) + sr.Name)
        else
          Result := DeleteFile(AddDirSuffix(Dir) + sr.Name);
        if not Result then
          Exit;
      end;
      fr := FindNext(sr);
    end;
  finally
    FindClose(sr);
  end;
  Result := RemoveDir(Dir);
end;

// 取文件夹文件数
function GetDirFiles(Dir: string): Integer;
var
  sr: TSearchRec;
  fr: Integer;
begin
  Result := 0;
  fr := FindFirst(AddDirSuffix(Dir) + '*.*', faAnyFile, sr);
  while fr = 0 do
  begin
    if (sr.Name <> '.') and (sr.Name <> '..') then
      Inc(Result);
    fr := FindNext(sr);
  end;
  FindClose(sr);
end;

var
  FindAbort: Boolean;

// 查找指定目录下文件
procedure FindFile(const Path: string; const FileName: string = '*.*';
  Proc: TFindCallBack = nil; bSub: Boolean = True; const bMsg: Boolean = True);
var
  APath: string;
  Info: TSearchRec;
  Succ: Integer;
begin
  FindAbort := False;
  APath := MakePath(Path);
  try
    Succ := FindFirst(APath + FileName, faAnyFile - faVolumeID, Info);
    while Succ = 0 do
    begin
      if (Info.Name <> '.') and (Info.Name <> '..') then
      begin
        if (Info.Attr and faDirectory) <> faDirectory then
        begin
          if Assigned(Proc) then
            Proc(APath + Info.FindData.cFileName, Info, FindAbort);
        end
        else if bSub then
          FindFile(APath + Info.Name, FileName, Proc, bSub, bMsg);
      end;
      if bMsg then Application.ProcessMessages;
      if FindAbort then Exit;
      Succ := FindNext(Info);
    end;
  finally
    FindClose(Info);
  end;
end;

{ 功能说明：查找一个路径下的所有文件。
  参数：path:路径, filter:文件扩展名过滤, FileList:文件列表, ContainSubDir:是否包含子目录}
procedure FindFileList(Path,Filter:string;FileList:TStrings;ContainSubDir:Boolean);
var
  FSearchRec,DSearchRec:TSearchRec;
  FindResult:shortint;
begin
  FindResult:=FindFirst(path+Filter,sysutils.faAnyFile,FSearchRec);

  try
  while FindResult=0 do
  begin
    FileList.Add(FSearchRec.Name);
    FindResult:=FindNext(FSearchRec);
  end;
  
  if ContainSubDir then
  begin
    FindResult:=FindFirst(path+Filter,faDirectory,DSearchRec);
    while FindResult=0 do
    begin
      if ((DSearchRec.Attr and faDirectory)=faDirectory)
        and (DSearchRec.Name<>'.') and (DSearchRec.Name<>'..') then
        FindFileList(Path,Filter,FileList,ContainSubDir);
        FindResult:=FindNext(DSearchRec);
    end;
  end;
  finally
    FindClose(FSearchRec);
  end;
end;
  
//返回一文本文件的行数
function Txtline(const txt: string): integer;
var
  F : TextFile; {设定为文本文件}
  StrLine : string; {每行字符串}
  line : Integer; {行数}
begin
  AssignFile(F, txt); {建立文件}
  Reset(F);
  Line := 0;
  while not SeekEof(f) do {文件没到尾}
  begin
    if SeekEoln(f) then {判断是否到行尾}
      Readln;
    Readln(F, StrLine);
    if SeekEof(f) then
      break
    else
      inc(Line);
  end;
  CloseFile(F); {关闭文件}
  Result := Line;
end;

//Html文件转化成文本文件
function Html2Txt(htmlfilename: string): string;
var Mystring:TStrings;
    s,lineS:string;
    line,Llen,i,j:integer;
    rloop:boolean;
begin
   rloop:=False;
   Mystring:=TStringlist.Create;
   s:='';
   Mystring.LoadFromFile(htmlfilename);
   line:=Mystring.Count;
   try
      for i:=0 to line-1 do
         Begin
            lineS:=Mystring[i];
            Llen:=length(lineS);
            j:=1;
            while (j<=Llen)and(lineS[j]=' ')do
            begin
               j:=j+1;
               s:=s+' ';
            End;
            while j<=Llen do
            Begin
               if lineS[j]='<'then
                  rloop:=True;
                  if lineS[j]='>'then
                     Begin
                        rloop:=False;
                        j:=j+1;
                        continue;
                     End;
                  if rloop then
                     begin
                        j:=j+1;
                        continue;
                     end
                  else
                    s:=s+lineS[j];
                     j:=j+1;
            End;
            s:=s+#13#10;
         End;
   finally
      Mystring.Free;
   end;{try}
   result:=s;
end;

// 文件打开方式
function OpenWith(const FileName: string): Integer;