Hi,

There MoveChars* function (or similar) native on Free Pascal?

(*) - http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/System_MoveChars.html

Thanks,

silvioprog wrote

There MoveChars* function (or similar) native on Free Pascal? (*) - http://docs.embarcadero.com/products/rad_studio/delphiAndcpp2009/HelpUpdate2/EN/html/delphivclwin32/System_MoveChars.html

As far as I can tell,

  MoveChars(Source,Dest,Length);

is exactly the same as

  Move(Source,Dest,Length*2);

Jonas

2012/7/22, Jonas Maebe :

Hm... I think that MoveChars copy a string to another string, but maintaining the contents of the second string (I'm without delphi for test it).

So, I'll try to explain my problem ...

I am needing to move a string to another string, eg:

var
  d, s: string;
begin
  d := 'the on the table';
  s := 'books ';
  SetLength(d, Length(d) + Length(s));
  Move(s, d[4], Length(s));
  writeln(d); // the result should be 'the books on the table', but I
get 'the|?S  |?e table  ?'
end;

I could easily do this using "copy", but I'm trying (without success) to do this at low level.

Thank you Jonas! :)

2012/7/22, silvioprog :
[...]

to do this at low level.

... in low level ...

MoveChars just moves data. It has no special support for strings or anything else. See the example code on the Embarcadero site.

This moves the contents of the string pointer (I suppose you are in a mode where string=ansistring), you have to use s[1] instead.

writeln(d); // the result should be 'the books on the table', but I get 'the|?S |?e table ?'

What you want is

var
 d, s: string;
begin
 d := 'the on the table';
 s := 'books ';
 insert(s,d,4);
 writeln(d);

end; I could easily do this using "copy", but I'm trying (without success) to do this at low level.

I would strongly recommend against it. You'll mainly run into problems by combining reference counted data and low level routines. The RTL versions already use the low level routines in the correct ways.

Jonas

2012/7/22, Jonas Maebe :

I'll use Insert, because now I can see what is really recommended. :)

Thank you again Jonas!

I could easily do this using "copy", but I'm trying (without success) to do this at low level.

...where you get what you asked for ;-)

Why do you want to do things at low level, which can be done easily on high level?

DoDi

2012/7/22, Hans-Peter Diettrich :

:)

Why do you want to do things at low level, which can be done easily on high level? DoDi

Is only in a specific case... I'm creating some useful functions for working with CGI (I'm extracting some ideas from PHP).