Solved

Unicode file

Posted on 2002-05-13
2
336 Views
Last Modified: 2010-04-04
I need to read a file in Unicode format. How can  i do this.
If i do something like this, it does not work.


var F: TextFile;
  S, SQLText: widestring;
 
begin
    AssignFile(F, FileName);
    Reset(F);
    while not EOF(F) do
    begin
     Readln(F, S);
    end;

0
Comment
Question by:fish_r63
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
2 Comments
 
LVL 8

Expert Comment

by:Cesario
ID: 7007033
Check http://www.lischke-online.de/Unicode.html .

You can probably read this file by a routine like this, which converts it to
ANSI.

Procedure LoadUnicodeFile( const filename: String; strings: TStrings );
  Procedure SwapWideChars( p: PWideChar );
    Begin
      While p^ <> #0000 Do Begin
        p^ := WideChar(Swap( Word(p^)));
        Inc( p );
      End; { While }
    End; { SwapWideChars }
  Var
    ms: TMemoryStream;
    wc: WideChar;
    pWc: PWideChar;
  Begin
    ms:= TMemoryStream.Create;
    try
      ms.LoadFromFile( filename );
      ms.Seek( 0, soFromend );
      wc := #0000;
      ms.Write( wc, sizeof(wc));

      pWC := ms.Memory;
      If pWc^ = #$FEFF Then // normal byte order mark
        Inc(pWc)  
      Else If pWc^ = #$FFFE Then Begin // byte order is big-endian
        SwapWideChars( pWc );
        Inc( pWc );
      End { If }
      Else ;  // no byte order mark
      strings.Text := WideCharToString( pWc );
    finally
      ms.free;
    end;
  End; { LoadUnicodeFile }
 
Use this like

  LoadUnicodeFile( filename, memo1.lines );  

Untested!

Best Regards

Cesario
0
 
LVL 1

Accepted Solution

by:
Alone earned 50 total points
ID: 7007052
Please, ty this sample:

var
  F: TStream;
  UnicodeString: WideString;
  UnicodeSign: Word;
  FileName: string;
  FileSize: Cardinal;
begin
  F := TFileStream.Create(FileName, fmOpenRead);
  try
    FileSize := F.Size;
    if FileSize >= SizeOf(UnicodeSign) then
    begin
      F.ReadBuffer(UnicodeSign, SizeOf(UnicodeSign));
      if UnicodeSign = $FEFF then
      begin
        Dec(FileSize, SizeOf(UnicodeSign);
        SetLength(UnicodeString, FileSize div SizeOf(WideChar));
        F.ReadBuffer(UnicodeString[1], FileSize);
        // now UnicodeString contains Unicode string read from stream
      end
      else
        // not a Unicode format;
    end;
  finally
    F.Free;
  end;
end;

WBR...
0

Featured Post

[Webinar] Learn How Hackers Steal Your Credentials

Do You Know How Hackers Steal Your Credentials? Join us and Skyport Systems to learn how hackers steal your credentials and why Active Directory must be secure to stop them. Thursday, July 13, 2017 10:00 A.M. PDT

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The uses clause is one of those things that just tends to grow and grow. Most of the time this is in the main form, as it's from this form that all others are called. If you have a big application (including many forms), the uses clause in the in…
This article explains how to create forms/units independent of other forms/units object names in a delphi project. Have you ever created a form for user input in a Delphi project and then had the need to have that same form in a other Delphi proj…
This video Micro Tutorial shows how to password-protect PDF files with free software. Many software products can do this, such as Adobe Acrobat (but not Adobe Reader), Nuance PaperPort, and Nuance Power PDF, but they are not free products. This vide…
Monitoring a network: why having a policy is the best policy? Michael Kulchisky, MCSE, MCSA, MCP, VTSP, VSP, CCSP outlines the enormous benefits of having a policy-based approach when monitoring medium and large networks. Software utilized in this v…

724 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question