Subversion Repositories userdetect2

unit UD2_Utils;

interface

{$IF CompilerVersion >= 25.0}

{$LEGACYIFEND ON}

{$IFEND}

{$INCLUDE 'UserDetect2.inc'}

uses

  Windows, SysUtils, Dialogs, ShellAPI, Classes, UD2_Parsing;

const

  EXITCODE_OK = 0;

  EXITCODE_TASK_NOTHING_MATCHES = 1;

  EXITCODE_RUN_FAILURE = 2;

  EXITCODE_TASK_NOT_EXISTS = 10;

  EXITCODE_INI_NOT_FOUND = 11;

  EXITCODE_RUNCMD_SYNTAX_ERROR = 12;

  EXITCODE_SYNTAX_ERROR = 13;

type

  TArrayOfString = array of string;

  TIconFileIdx = record

    FileName: string;

    IconIndex: integer;

  end;

function SplitString(const aSeparator, aString: string; aMax: Integer = 0): TArrayOfString;

function MergeString(ary: TArrayOfString; glue: string): string;

function BetterInterpreteBool(str: string): boolean;

function GetOwnCmdName: string;

function ExpandEnvStr(const szInput: string): string;

procedure UD2_RunCMD(cmd: TUD2Command);

function SplitIconString(IconString: string): TIconFileIdx;

// function GetHTML(AUrl: string): string;

procedure VTS_CheckUpdates(VTSID, CurVer: string);

function FormatOSError(ec: DWORD): string;

function CheckBoolParam(idx: integer; name: string): boolean;

function IndexOf_CS(aStrings: TStrings; aToken: string): Integer;

function UD2_GetThreadErrorMode: DWORD;

function UD2_SetThreadErrorMode(dwNewMode: DWORD; lpOldMode: LPDWORD): BOOL;

implementation

uses

  idhttp, Forms;

function SplitString(const aSeparator, aString: string; aMax: Integer = 0): TArrayOfString;

// http://stackoverflow.com/a/2626991/3544341

var

  i, strt, cnt: Integer;

  sepLen: Integer;

  procedure AddString(aEnd: Integer = -1);

  var

    endPos: Integer;

  begin

    if (aEnd = -1) then

      endPos := i

    else

      endPos := aEnd + 1;

    if (strt < endPos) then

      result[cnt] := Copy(aString, strt, endPos - strt)

    else

      result[cnt] := '';

    Inc(cnt);

  end;

begin

  if (aString = '') or (aMax < 0) then

  begin

    SetLength(result, 0);

    EXIT;

  end;

  if (aSeparator = '') then

  begin

    SetLength(result, 1);

    result[0] := aString;

    EXIT;

  end;

  sepLen := Length(aSeparator);

  SetLength(result, (Length(aString) div sepLen) + 1);

  i     := 1;

  strt  := i;

  cnt   := 0;

  while (i <= (Length(aString)- sepLen + 1)) do

  begin

    if (aString[i] = aSeparator[1]) then

      if (Copy(aString, i, sepLen) = aSeparator) then

      begin

        AddString;

        if (cnt = aMax) then

        begin

          SetLength(result, cnt);

          EXIT;

        end;

        Inc(i, sepLen - 1);

        strt := i + 1;

      end;

    Inc(i);

  end;

  AddString(Length(aString));

  SetLength(result, cnt);

end;

function BetterInterpreteBool(str: string): boolean;

resourcestring

  LNG_CANNOT_INTERPRETE_BOOL = 'Cannot determinate the boolean value of "%s"';

begin

  str := LowerCase(str);

  if (str = 'yes') or (str = 'true') or (str = '1') then

    result := true

  else if (str = 'no') or (str = 'false') or (str = '0') then

    result := false

  else

    raise EConvertError.CreateFmt(LNG_CANNOT_INTERPRETE_BOOL, [str]);

end;

function GetOwnCmdName: string;

begin

  result := ParamStr(0);

  result := ExtractFileName(result);

  result := ChangeFileExt(result, '');

  result := UpperCase(result);

end;

function ExpandEnvStr(const szInput: string): string;

// http://stackoverflow.com/a/2833147/3544341

const

  MAXSIZE = 32768;

begin

  SetLength(Result, MAXSIZE);

  SetLength(Result, ExpandEnvironmentStrings(pchar(szInput),

    @Result[1],length(Result)));

end;

function FormatOSError(ec: DWORD): string;

resourcestring

  LNG_UNKNOWN_ERROR = 'Operating system error %d';

begin

  result := SysErrorMessage(ec);

  // Some errors have no error message, e.g. error 193 (BAD_EXE_FORMAT) in the German version of Windows 10

  if result = '' then result := Format(LNG_UNKNOWN_ERROR, [ec]);

end;

function CheckLastOSCall(AThrowException: boolean): boolean;

var

  LastError: Cardinal;

begin

  LastError := GetLastError;

  result := LastError = 0;

  if not result then

  begin

    if AThrowException then

    begin

      RaiseLastOSError;

    end

    else

    begin

      MessageDlg(FormatOSError(LastError), mtError, [mbOK], 0);

    end;

  end;

end;

function SplitIconString(IconString: string): TIconFileIdx;

var

  p: integer;

begin

  p := Pos(',', IconString);

  if p = 0 then

  begin

    result.FileName := IconString;

    result.IconIndex := 0;

  end

  else

  begin

    result.FileName  := ExpandEnvStr(copy(IconString, 0, p-1));

    result.IconIndex := StrToInt(Copy(IconString, p+1, Length(IconString)-p));

  end;

end;

procedure UD2_RunCMD(cmd: TUD2Command);

// Discussion: http://stackoverflow.com/questions/32802679/acceptable-replacement-for-winexec/32804669#32804669

// Version 1: http://pastebin.com/xQjDmyVe

// --> CreateProcess + ShellExecuteEx

// --> Problem: Run-In-Same-Directory functionality is not possible

//              (requires manual command and argument separation)

// Version 2: http://pastebin.com/YpUmF5rd

// --> Splits command and arguments manually, and uses ShellExecute

// --> Problem: error handling wrong

// --> Problem: Run-In-Same-Directory functionality is not implemented

// Current version:

// --> Splits command and arguments manually, and uses ShellExecute

// --> Run-In-Same-Directory functionality is implemented

resourcestring

  LNG_INVALID_SYNTAX = 'The command line has an invalid syntax';

var

  cmdFile, cmdArgs, cmdDir: string;

  p: integer;

  sei: TShellExecuteInfo;

  cmdLine: string;

begin

  // We need a function which does following:

  // 1. Replace the Environment strings, e.g. %SystemRoot%

  // 2. Runs EXE files with parameters (e.g. "cmd.exe /?")

  // 3. Runs EXE files without path (e.g. "calc.exe")

  // 4. Runs EXE files without extension (e.g. "calc")

  // 5. Runs non-EXE files (e.g. "Letter.doc")

  // 6. Commands with white spaces (e.g. "C:\Program Files\xyz.exe") must be enclosed in quotes.

  cmdLine := ExpandEnvStr(cmd.executable);

  // Split command line from argument list

  if Copy(cmdLine, 1, 1) = '"' then

  begin

    cmdLine := Copy(cmdLine, 2, Length(cmdLine)-1);

    p := Pos('"', cmdLine);

    if p = 0 then

    begin

      // No matching quotes

      // CreateProcess() handles the whole command line as single file name  ("abc -> "abc")

      // ShellExecuteEx() does not accept the command line

      ExitCode := EXITCODE_RUNCMD_SYNTAX_ERROR;

      MessageDlg(LNG_INVALID_SYNTAX, mtError, [mbOK], 0);

      Exit;

    end;

    cmdFile := Copy(cmdLine, 1, p-1);

    cmdArgs := Copy(cmdLine, p+2, Length(cmdLine)-p-1);

  end

  else

  begin

    p := Pos(' ', cmdLine);

    if p = 0 then

    begin

      cmdFile := cmdLine;

      cmdArgs := '';

    end

    else

    begin

      cmdFile := Copy(cmdLine, 1, p-1);

      cmdArgs := Copy(cmdLine, p+1, Length(cmdLine)-p);

    end;

  end;

  ZeroMemory(@sei, SizeOf(sei));

  if cmd.runAsAdmin then

  begin

    sei.lpVerb := 'runas';

  end;

  if cmd.runInOwnDirectory then

  begin

    cmdFile := ExtractFileName(cmdLine);

    cmdDir  := ExtractFilePath(cmdLine);

  end

  else

  begin

    cmdFile := cmdLine;

    cmdDir := '';

  end;

  sei.cbSize       := SizeOf(sei);

  sei.lpFile       := PChar(cmdFile);

  {$IFNDEF PREFER_SHELLEXECUTEEX_MESSAGES}

  sei.fMask        := SEE_MASK_FLAG_NO_UI;

  {$ENDIF}

  if cmdArgs <> '' then sei.lpParameters := PChar(cmdArgs);

  if cmdDir  <> '' then sei.lpDirectory  := PChar(cmdDir);

  sei.nShow        := cmd.windowMode;

  if ShellExecuteEx(@sei) then Exit;

  {$IFNDEF PREFER_SHELLEXECUTEEX_MESSAGES}

  if not CheckLastOSCall(false) then ExitCode := EXITCODE_RUN_FAILURE;

  {$ENDIF}

end;

function GetHTML(const url: string): string;

var

  idhttp :Tidhttp;

begin

  idhttp := Tidhttp.Create(nil);

  try

    result := idhttp.Get(url);

  finally

    idhttp.Free;

  end;

end;

procedure VTS_CheckUpdates(VTSID, CurVer: string);

resourcestring

  (*

  LNG_DOWNLOAD_ERR = 'Ein Fehler ist aufgetreten. Wahrscheinlich ist keine Internetverbindung aufgebaut, oder der der ViaThinkSoft-Server temporär offline.';

  LNG_NEW_VERSION = 'Eine neue Programmversion ist vorhanden. Möchten Sie diese jetzt herunterladen?';

  LNG_NO_UPDATE = 'Es ist keine neue Programmversion vorhanden.';

  *)

  LNG_DOWNLOAD_ERR = 'An error occurred while searching for updates. Please check your internet connection and firewall.';

  LNG_NEW_VERSION = 'A new version is available. Do you want to download it now?';

  LNG_NO_UPDATE = 'You already have the newest program version.';

var

  status: string;

begin

  status := GetHTML('http://www.viathinksoft.de/update/?id='+VTSID);

  if Copy(status, 0, 7) = 'Status:' then

  begin

    MessageDlg(LNG_DOWNLOAD_ERR, mtError, [mbOK], 0);

  end

  else

  begin

    if status <> CurVer then

    begin

      if MessageDlg(LNG_NEW_VERSION, mtConfirmation, mbYesNoCancel, 0) = ID_YES then

      begin

        shellexecute(application.handle, 'open', pchar('http://www.viathinksoft.de/update/?id=@'+VTSID), '', '', SW_Normal);

      end;

    end

    else

    begin

      MessageDlg(LNG_NO_UPDATE, mtInformation, [mbOk], 0);

    end;

  end;

end;

function CheckBoolParam(idx: integer; name: string): boolean;

begin

  Result := ('/'+LowerCase(name) = LowerCase(ParamStr(idx))) or

            ('-'+LowerCase(name) = LowerCase(ParamStr(idx)));

end;

// function GetThreadErrorMode: DWORD; stdcall; external kernel32 name 'GetThreadErrorMode';

function UD2_GetThreadErrorMode: DWORD;

type

  TFuncGetThreadErrorMode = function: DWORD; stdcall;

var

  dllHandle: Cardinal;

  fGetThreadErrorMode: TFuncGetThreadErrorMode;

begin

  dllHandle := LoadLibrary(kernel32);

  if dllHandle = 0 then

  begin

    result := 0;

    Exit;

  end;

  try

    @fGetThreadErrorMode := GetProcAddress(dllHandle, 'GetThreadErrorMode');

    if not Assigned(fGetThreadErrorMode) then

    begin

      result := 0; // Windows Vista and prior

      Exit;

    end;

    result := fGetThreadErrorMode();

  finally

    FreeLibrary(dllHandle);

  end;

end;

// function SetThreadErrorMode(dwNewMode: DWORD; lpOldMode: LPDWORD): BOOL; stdcall; external kernel32 name 'SetThreadErrorMode';

function UD2_SetThreadErrorMode(dwNewMode: DWORD; lpOldMode: LPDWORD): BOOL;

type

  TFuncSetThreadErrorMode = function(dwNewMode: DWORD; lpOldMode: LPDWORD): BOOL; stdcall;

var

  dllHandle: Cardinal;

  fSetThreadErrorMode: TFuncSetThreadErrorMode;

begin

  dllHandle := LoadLibrary(kernel32);

  if dllHandle = 0 then

  begin

    result := FALSE;

    if Assigned(lpOldMode) then lpOldMode^ := UD2_GetThreadErrorMode;

    Exit;

  end;

  try

    @fSetThreadErrorMode := GetProcAddress(dllHandle, 'SetThreadErrorMode');

    if not Assigned(fSetThreadErrorMode) then

    begin

      result := FALSE; // Windows Vista and prior

      if Assigned(lpOldMode) then lpOldMode^ := UD2_GetThreadErrorMode;

      Exit;

    end;

    result := fSetThreadErrorMode(dwNewMode, lpOldMode);

  finally

    FreeLibrary(dllHandle);

  end;

end;

function IndexOf_CS(aStrings: TStrings; aToken: String): Integer;

var

  i: Integer;

begin

  Result := -1;

  for i := 0 to aStrings.Count-1 do

  begin

    if aStrings[i] = aToken then

    begin

      Result := i;

      Break;

    end;

  end;

end;

function MergeString(ary: TArrayOfString; glue: string): string;

var

  i: integer;

begin

  result := '';

  for i := Low(ary) to High(ary) do

  begin

    if result <> '' then result := result + glue;

    result := result + ary[i];

  end;

end;

end.